Add support for the currituck 476 platform from IBM

Add support for the currituck 476 platform from IBM

[Tony Breeds]

Patches 1 and 2
	Modify the 44x PCI code to work with currituck.
Patch 3
	Is an old patch by Christoph Egger that fell through the cracks somehow.
Patches 4 and 5
	Modify the bootwrapper to handle currituck
Patch 6 
	The platform itself.

 arch/powerpc/boot/Makefile                   |    5 +-
 arch/powerpc/boot/dcr.h                      |    6 +
 arch/powerpc/boot/div64.S                    |   52 ++++++
 arch/powerpc/boot/dts/currituck.dts          |  240 ++++++++++++++++++++++++++
 arch/powerpc/boot/treeboot-currituck.c       |  129 ++++++++++++++
 arch/powerpc/boot/wrapper                    |    3 +
 arch/powerpc/configs/44x/currituck_defconfig |  110 ++++++++++++
 arch/powerpc/include/asm/reg.h               |    1 +
 arch/powerpc/kernel/cputable.c               |   14 ++
 arch/powerpc/kernel/head_44x.S               |    2 +
 arch/powerpc/mm/44x_mmu.c                    |    4 -
 arch/powerpc/platforms/44x/Kconfig           |   10 +
 arch/powerpc/platforms/44x/Makefile          |    1 +
 arch/powerpc/platforms/44x/ppc47x.c          |  198 +++++++++++++++++++++
 arch/powerpc/sysdev/ppc4xx_pci.c             |   69 +++++++-
 arch/powerpc/sysdev/ppc4xx_pci.h             |    7 +
 16 files changed, 842 insertions(+), 9 deletions(-)

[PATCH 1/6] 44x/pci: Continue pci setup even if there is no sdr-base in the device-tree

[Tony Breeds]

Signed-off-by: Tony Breeds <tony@bakeyournoodle.com>
---
 arch/powerpc/sysdev/ppc4xx_pci.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/powerpc/sysdev/ppc4xx_pci.c b/arch/powerpc/sysdev/ppc4xx_pci.c
index 16f5eba..d3fa380 100644
--- a/arch/powerpc/sysdev/ppc4xx_pci.c
+++ b/arch/powerpc/sysdev/ppc4xx_pci.c
@@ -1974,11 +1974,11 @@ static void __init ppc4xx_probe_pciex_bridge(struct device_node *np)
 	port->node = of_node_get(np);
 	pval = of_get_property(np, "sdr-base", NULL);
 	if (pval == NULL) {
-		printk(KERN_ERR "PCIE: missing sdr-base for %s\n",
+		printk(KERN_INFO "PCIE: missing sdr-base for %s\n",
 		       np->full_name);
-		return;
+	} else {
+		port->sdr_base = *pval;
 	}
-	port->sdr_base = *pval;
 
 	/* Check if device_type property is set to "pci" or "pci-endpoint".
 	 * Resulting from this setup this PCIe port will be configured
-- 
1.7.6.4

[PATCH 2/6] 44x/pci: Setup the dma_window properties for each pci_controller

[Tony Breeds]

Needed if you want to use swiotlb, harmless otherwise.

Signed-off-by: Tony Breeds <tony@bakeyournoodle.com>
---
 arch/powerpc/sysdev/ppc4xx_pci.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/arch/powerpc/sysdev/ppc4xx_pci.c b/arch/powerpc/sysdev/ppc4xx_pci.c
index d3fa380..d766068 100644
--- a/arch/powerpc/sysdev/ppc4xx_pci.c
+++ b/arch/powerpc/sysdev/ppc4xx_pci.c
@@ -185,9 +185,15 @@ static int __init ppc4xx_parse_dma_ranges(struct pci_controller *hose,
  out:
 	dma_offset_set = 1;
 	pci_dram_offset = res->start;
+	hose->dma_window_base_cur = res->start;
+	hose->dma_window_size = resource_size(res);
 
 	printk(KERN_INFO "4xx PCI DMA offset set to 0x%08lx\n",
 	       pci_dram_offset);
+	printk(KERN_INFO "4xx PCI DMA window base to 0x%016llx\n",
+	       (unsigned long long)hose->dma_window_base_cur);
+	printk(KERN_INFO "DMA window size 0x%016llx\n",
+	       (unsigned long long)hose->dma_window_size);
 	return 0;
 }
 
-- 
1.7.6.4

[PATCH 3/6] 44x: Removing dead CONFIG_PPC47x

[Tony Breeds]

From: Christoph Egger <siccegge@cs.fau.de>

CONFIG_PPC47x doesn't exist in Kconfig, therefore removing all
references for it from the source code.

Signed-off-by: Christoph Egger <siccegge@cs.fau.de>
---
 arch/powerpc/mm/44x_mmu.c |    4 ----
 1 files changed, 0 insertions(+), 4 deletions(-)

diff --git a/arch/powerpc/mm/44x_mmu.c b/arch/powerpc/mm/44x_mmu.c
index f60e006..5d4e3ff 100644
--- a/arch/powerpc/mm/44x_mmu.c
+++ b/arch/powerpc/mm/44x_mmu.c
@@ -78,11 +78,7 @@ static void __init ppc44x_pin_tlb(unsigned int virt, unsigned int phys)
 		"tlbwe	%1,%3,%5\n"
 		"tlbwe	%0,%3,%6\n"
 	:
-#ifdef CONFIG_PPC47x
-	: "r" (PPC47x_TLB2_S_RWX),
-#else
 	: "r" (PPC44x_TLB_SW | PPC44x_TLB_SR | PPC44x_TLB_SX | PPC44x_TLB_G),
-#endif
 	  "r" (phys),
 	  "r" (virt | PPC44x_TLB_VALID | PPC44x_TLB_256M),
 	  "r" (entry),
-- 
1.7.6.4

[PATCH 4/6] powerpc/boot: Add extended precision shifts to the boot wrapper.

[Tony Breeds]

Code copied from arch/powerpc/kernel/misc_32.S

Signed-off-by: Tony Breeds <tony@bakeyournoodle.com>
---
 arch/powerpc/boot/div64.S |   52 +++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 52 insertions(+), 0 deletions(-)

diff --git a/arch/powerpc/boot/div64.S b/arch/powerpc/boot/div64.S
index d271ab5..bbcb8a4 100644
--- a/arch/powerpc/boot/div64.S
+++ b/arch/powerpc/boot/div64.S
@@ -57,3 +57,55 @@ __div64_32:
 	stw	r8,4(r3)
 	mr	r3,r6		# return the remainder in r3
 	blr
+
+/*
+ * Extended precision shifts.
+ *
+ * Updated to be valid for shift counts from 0 to 63 inclusive.
+ * -- Gabriel
+ *
+ * R3/R4 has 64 bit value
+ * R5    has shift count
+ * result in R3/R4
+ *
+ *  ashrdi3: arithmetic right shift (sign propagation)	
+ *  lshrdi3: logical right shift
+ *  ashldi3: left shift
+ */
+	.globl __ashrdi3
+__ashrdi3:
+	subfic	r6,r5,32
+	srw	r4,r4,r5	# LSW = count > 31 ? 0 : LSW >> count
+	addi	r7,r5,32	# could be xori, or addi with -32
+	slw	r6,r3,r6	# t1 = count > 31 ? 0 : MSW << (32-count)
+	rlwinm	r8,r7,0,32	# t3 = (count < 32) ? 32 : 0
+	sraw	r7,r3,r7	# t2 = MSW >> (count-32)
+	or	r4,r4,r6	# LSW |= t1
+	slw	r7,r7,r8	# t2 = (count < 32) ? 0 : t2
+	sraw	r3,r3,r5	# MSW = MSW >> count
+	or	r4,r4,r7	# LSW |= t2
+	blr
+
+	.globl __ashldi3
+__ashldi3:
+	subfic	r6,r5,32
+	slw	r3,r3,r5	# MSW = count > 31 ? 0 : MSW << count
+	addi	r7,r5,32	# could be xori, or addi with -32
+	srw	r6,r4,r6	# t1 = count > 31 ? 0 : LSW >> (32-count)
+	slw	r7,r4,r7	# t2 = count < 32 ? 0 : LSW << (count-32)
+	or	r3,r3,r6	# MSW |= t1
+	slw	r4,r4,r5	# LSW = LSW << count
+	or	r3,r3,r7	# MSW |= t2
+	blr
+
+	.globl __lshrdi3
+__lshrdi3:
+	subfic	r6,r5,32
+	srw	r4,r4,r5	# LSW = count > 31 ? 0 : LSW >> count
+	addi	r7,r5,32	# could be xori, or addi with -32
+	slw	r6,r3,r6	# t1 = count > 31 ? 0 : MSW << (32-count)
+	srw	r7,r3,r7	# t2 = count < 32 ? 0 : MSW >> (count-32)
+	or	r4,r4,r6	# LSW |= t1
+	srw	r3,r3,r5	# MSW = MSW >> count
+	or	r4,r4,r7	# LSW |= t2
+	blr
-- 
1.7.6.4

[PATCH 5/6] powerpc/boot: Add mfdcrx

[Tony Breeds]

Signed-off-by: Tony Breeds <tony@bakeyournoodle.com>
---
 arch/powerpc/boot/dcr.h |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/arch/powerpc/boot/dcr.h b/arch/powerpc/boot/dcr.h
index 645a7c9..51b5893 100644
--- a/arch/powerpc/boot/dcr.h
+++ b/arch/powerpc/boot/dcr.h
@@ -9,6 +9,12 @@
 	})
 #define mtdcr(rn, val) \
 	asm volatile("mtdcr %0,%1" : : "i"(rn), "r"(val))
+#define mfdcrx(rn) \
+	({	\
+		unsigned long rval; \
+		asm volatile("mfdcrx %0,%1" : "=r"(rval) : "g"(rn)); \
+		rval; \
+	})
 
 /* 440GP/440GX SDRAM controller DCRs */
 #define DCRN_SDRAM0_CFGADDR				0x010
-- 
1.7.6.4

[PATCH 6/6] 44x/currituck: Add support for the new IBM currituck platform

[Tony Breeds]

Based on original work by David 'Shaggy' Kliekamp.

Signed-off-by: Tony Breeds <tony@bakeyournoodle.com>
---
 arch/powerpc/boot/Makefile                   |    5 +-
 arch/powerpc/boot/dts/currituck.dts          |  240 ++++++++++++++++++++++++++
 arch/powerpc/boot/treeboot-currituck.c       |  129 ++++++++++++++
 arch/powerpc/boot/wrapper                    |    3 +
 arch/powerpc/configs/44x/currituck_defconfig |  110 ++++++++++++
 arch/powerpc/include/asm/reg.h               |    1 +
 arch/powerpc/kernel/cputable.c               |   14 ++
 arch/powerpc/kernel/head_44x.S               |    2 +
 arch/powerpc/platforms/44x/Kconfig           |   10 +
 arch/powerpc/platforms/44x/Makefile          |    1 +
 arch/powerpc/platforms/44x/ppc47x.c          |  198 +++++++++++++++++++++
 arch/powerpc/sysdev/ppc4xx_pci.c             |   57 ++++++-
 arch/powerpc/sysdev/ppc4xx_pci.h             |    7 +
 13 files changed, 775 insertions(+), 2 deletions(-)
 create mode 100644 arch/powerpc/boot/dts/currituck.dts
 create mode 100644 arch/powerpc/boot/treeboot-currituck.c
 create mode 100644 arch/powerpc/configs/44x/currituck_defconfig
 create mode 100644 arch/powerpc/platforms/44x/ppc47x.c

diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile
index 72ee8c1..ff0057f 100644
--- a/arch/powerpc/boot/Makefile
+++ b/arch/powerpc/boot/Makefile
@@ -45,6 +45,7 @@ $(obj)/cuboot-katmai.o: BOOTCFLAGS += -mcpu=405
 $(obj)/cuboot-acadia.o: BOOTCFLAGS += -mcpu=405
 $(obj)/treeboot-walnut.o: BOOTCFLAGS += -mcpu=405
 $(obj)/treeboot-iss4xx.o: BOOTCFLAGS += -mcpu=405
+$(obj)/treeboot-currituck.o: BOOTCFLAGS += -mcpu=405
 $(obj)/virtex405-head.o: BOOTAFLAGS += -mcpu=405
 
 
@@ -79,7 +80,8 @@ src-plat := of.c cuboot-52xx.c cuboot-824x.c cuboot-83xx.c cuboot-85xx.c holly.c
 		cuboot-warp.c cuboot-85xx-cpm2.c cuboot-yosemite.c simpleboot.c \
 		virtex405-head.S virtex.c redboot-83xx.c cuboot-sam440ep.c \
 		cuboot-acadia.c cuboot-amigaone.c cuboot-kilauea.c \
-		gamecube-head.S gamecube.c wii-head.S wii.c treeboot-iss4xx.c
+		gamecube-head.S gamecube.c wii-head.S wii.c treeboot-iss4xx.c \
+		treeboot-currituck.c
 src-boot := $(src-wlib) $(src-plat) empty.c
 
 src-boot := $(addprefix $(obj)/, $(src-boot))
@@ -212,6 +214,7 @@ image-$(CONFIG_WARP)			+= cuImage.warp
 image-$(CONFIG_YOSEMITE)		+= cuImage.yosemite
 image-$(CONFIG_ISS4xx)			+= treeImage.iss4xx \
 					   treeImage.iss4xx-mpic
+image-$(CONFIG_CURRITUCK)			+= treeImage.currituck
 
 # Board ports in arch/powerpc/platform/8xx/Kconfig
 image-$(CONFIG_MPC86XADS)		+= cuImage.mpc866ads
diff --git a/arch/powerpc/boot/dts/currituck.dts b/arch/powerpc/boot/dts/currituck.dts
new file mode 100644
index 0000000..7a021a8
--- /dev/null
+++ b/arch/powerpc/boot/dts/currituck.dts
@@ -0,0 +1,240 @@
+/*
+ * Device Tree Source for IBM Embedded PPC 476 Platform
+ *
+ * Copyright © 2011 Tony Breeds IBM Corporation
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without
+ * any warranty of any kind, whether express or implied.
+ */
+
+/dts-v1/;
+
+/memreserve/ 0x01f00000 0x00100000;	// spin table
+
+/ {
+	#address-cells = <2>;
+	#size-cells = <2>;
+	model = "ibm,currituck";
+	compatible = "ibm,currituck", "ibm,476";
+	dcr-parent = <&{/cpus/cpu@0}>;
+
+	aliases {
+		serial0 = &UART0;
+	};
+
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		cpu@0 {
+			device_type = "cpu";
+			model = "PowerPC,476";
+			reg = <0>;
+			clock-frequency = <1600000000>; // 1.6 GHz
+			timebase-frequency = <100000000>; // 100Mhz
+			i-cache-line-size = <32>;
+			d-cache-line-size = <32>;
+			i-cache-size = <32768>;
+			d-cache-size = <32768>;
+			dcr-controller;
+			dcr-access-method = "native";
+			status = "ok";
+		};
+		cpu@1 {
+			device_type = "cpu";
+			model = "PowerPC,476";
+			reg = <1>;
+			clock-frequency = <1600000000>; // 1.6 GHz
+			timebase-frequency = <100000000>; // 100Mhz
+			i-cache-line-size = <32>;
+			d-cache-line-size = <32>;
+			i-cache-size = <32768>;
+			d-cache-size = <32768>;
+			dcr-controller;
+			dcr-access-method = "native";
+			status = "disabled";
+			enable-method = "spin-table";
+			cpu-release-addr = <0x0 0x01f00000>;
+		};
+	};
+
+	memory {
+		device_type = "memory";
+		reg = <0x0 0x0 0x0 0x0>; // filled in by zImage
+	};
+
+	MPIC: interrupt-controller {
+		compatible = "chrp,open-pic";
+		interrupt-controller;
+		dcr-reg = <0xffc00000 0x00040000>;
+		#address-cells = <0>;
+		#size-cells = <0>;
+		#interrupt-cells = <2>;
+
+	};
+
+	plb {
+		compatible = "ibm,plb-4xx", "ibm,plb4"; /* Could be PLB6, doesn't matter */
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+		clock-frequency = <200000000>; // 200Mhz
+
+		POB0: opb {
+			compatible = "ibm,opb-4xx", "ibm,opb";
+			#address-cells = <1>;
+			#size-cells = <1>;
+			/* Wish there was a nicer way of specifying a full
+			 * 32-bit range
+			 *
+			 * XXX: 1 TB address space, do we really care past
+			 * 4 GB and should we expand cell width?
+			 */
+			ranges = <0x00000000 0x00000200 0x00000000 0x80000000
+				  0x80000000 0x00000200 0x80000000 0x80000000>;
+			clock-frequency = <100000000>;
+
+			UART0: serial@10000000 {
+				device_type = "serial";
+				compatible = "ns16750", "ns16550";
+				reg = <0x10000000 0x00000008>;
+				virtual-reg = <0xe1000000>;
+				clock-frequency = <1851851>; // PCIe refclk/MCGC0_CTL[UART]
+				current-speed = <115200>;
+				interrupt-parent = <&MPIC>;
+				interrupts = <34 2>;
+			};
+
+			IIC0: i2c@00000000 {
+				compatible = "ibm,iic-currituck", "ibm,iic";
+				reg = <0x0 0x00000014>;
+				interrupt-parent = <&MPIC>;
+				interrupts = <79 2>;
+				#address-cells = <1>;
+				#size-cells = <0>;
+                                rtc@68 {
+                                        compatible = "stm,m41t80", "m41st85";
+                                        reg = <0x68>;
+                                };
+			};
+		};
+
+		PCIE0: pciex@10100000000 {		// 4xGBIF1
+			device_type = "pci";
+			#interrupt-cells = <1>;
+			#size-cells = <2>;
+			#address-cells = <3>;
+			compatible = "ibm,plb-pciex-currituck", "ibm,plb-pciex";
+			primary;
+			port = <0x0>; /* port number */
+			reg = <0x00000101 0x00000000 0x0 0x10000000		/* Config space access */
+			       0x00000100 0x00000000 0x0 0x00001000>;	/* UTL Registers space access */
+			dcr-reg = <0x80 0x20>;
+
+//                                pci_space  < pci_addr          > < cpu_addr          > < size       >
+			ranges = <0x02000000 0x00000000 0x80000000 0x00000110 0x80000000 0x0 0x80000000
+			          0x01000000 0x0        0x0        0x00000140 0x0        0x0 0x00010000>;
+
+			/* Inbound starting at 0 to memsize filled in by zImage */
+			dma-ranges = <0x42000000 0x0 0x0 0x0 0x0 0x0 0x0>;
+
+			/* This drives busses 0 to 0xf */
+			bus-range = <0x0 0xf>;
+
+			/* Legacy interrupts (note the weird polarity, the bridge seems
+			 * to invert PCIe legacy interrupts).
+			 * We are de-swizzling here because the numbers are actually for
+			 * port of the root complex virtual P2P bridge. But I want
+			 * to avoid putting a node for it in the tree, so the numbers
+			 * below are basically de-swizzled numbers.
+			 * The real slot is on idsel 0, so the swizzling is 1:1
+			 */
+			interrupt-map-mask = <0x0 0x0 0x0 0x7>;
+			interrupt-map = <
+				0x0 0x0 0x0 0x1 &MPIC 46 0x2 /* int A */
+				0x0 0x0 0x0 0x2 &MPIC 47 0x2 /* int B */
+				0x0 0x0 0x0 0x3 &MPIC 48 0x2 /* int C */
+				0x0 0x0 0x0 0x4 &MPIC 49 0x2 /* int D */>;
+		};
+
+		PCIE1: pciex@30100000000 {		// 4xGBIF0
+			device_type = "pci";
+			#interrupt-cells = <1>;
+			#size-cells = <2>;
+			#address-cells = <3>;
+			compatible = "ibm,plb-pciex-currituck", "ibm,plb-pciex";
+			primary;
+			port = <0x1>; /* port number */
+			reg = <0x00000301 0x00000000 0x0 0x10000000		/* Config space access */
+			       0x00000300 0x00000000 0x0 0x00001000>;	/* UTL Registers space access */
+			dcr-reg = <0x60 0x20>;
+
+			ranges = <0x02000000 0x00000000 0x80000000 0x00000310 0x80000000 0x0 0x80000000
+			          0x01000000 0x0        0x0        0x00000340 0x0        0x0 0x00010000>;
+
+			/* Inbound starting at 0 to memsize filled in by zImage */
+			dma-ranges = <0x42000000 0x0 0x0 0x0 0x0 0x0 0x0>;
+
+			/* This drives busses 0 to 0xf */
+			bus-range = <0x0 0xf>;
+
+			/* Legacy interrupts (note the weird polarity, the bridge seems
+			 * to invert PCIe legacy interrupts).
+			 * We are de-swizzling here because the numbers are actually for
+			 * port of the root complex virtual P2P bridge. But I want
+			 * to avoid putting a node for it in the tree, so the numbers
+			 * below are basically de-swizzled numbers.
+			 * The real slot is on idsel 0, so the swizzling is 1:1
+			 */
+			interrupt-map-mask = <0x0 0x0 0x0 0x7>;
+			interrupt-map = <
+				0x0 0x0 0x0 0x1 &MPIC 38 0x2 /* int A */
+				0x0 0x0 0x0 0x2 &MPIC 39 0x2 /* int B */
+				0x0 0x0 0x0 0x3 &MPIC 40 0x2 /* int C */
+				0x0 0x0 0x0 0x4 &MPIC 41 0x2 /* int D */>;
+		};
+
+		PCIE2: pciex@38100000000 {		// 2xGBIF0
+			device_type = "pci";
+			#interrupt-cells = <1>;
+			#size-cells = <2>;
+			#address-cells = <3>;
+			compatible = "ibm,plb-pciex-currituck", "ibm,plb-pciex";
+			primary;
+			port = <0x2>; /* port number */
+			reg = <0x00000381 0x00000000 0x0 0x10000000		/* Config space access */
+			       0x00000380 0x00000000 0x0 0x00001000>;	/* UTL Registers space access */
+			dcr-reg = <0xA0 0x20>;
+
+			ranges = <0x02000000 0x00000000 0x80000000 0x00000390 0x80000000 0x0 0x80000000
+			          0x01000000 0x0        0x0        0x000003C0 0x0        0x0 0x00010000>;
+
+			/* Inbound starting at 0 to memsize filled in by zImage */
+			dma-ranges = <0x42000000 0x0 0x0 0x0 0x0 0x0 0x0>;
+
+			/* This drives busses 0 to 0xf */
+			bus-range = <0x0 0xf>;
+
+			/* Legacy interrupts (note the weird polarity, the bridge seems
+			 * to invert PCIe legacy interrupts).
+			 * We are de-swizzling here because the numbers are actually for
+			 * port of the root complex virtual P2P bridge. But I want
+			 * to avoid putting a node for it in the tree, so the numbers
+			 * below are basically de-swizzled numbers.
+			 * The real slot is on idsel 0, so the swizzling is 1:1
+			 */
+			interrupt-map-mask = <0x0 0x0 0x0 0x7>;
+			interrupt-map = <
+				0x0 0x0 0x0 0x1 &MPIC 54 0x2 /* int A */
+				0x0 0x0 0x0 0x2 &MPIC 55 0x2 /* int B */
+				0x0 0x0 0x0 0x3 &MPIC 56 0x2 /* int C */
+				0x0 0x0 0x0 0x4 &MPIC 57 0x2 /* int D */>;
+		};
+
+	};
+
+	chosen {
+		linux,stdout-path = &UART0;
+	};
+};
diff --git a/arch/powerpc/boot/treeboot-currituck.c b/arch/powerpc/boot/treeboot-currituck.c
new file mode 100644
index 0000000..aaf9dbf
--- /dev/null
+++ b/arch/powerpc/boot/treeboot-currituck.c
@@ -0,0 +1,129 @@
+/*
+ * Copyright © 2011 Tony Breeds IBM Corporation
+ *
+ * Based on earlier code:
+ *   Copyright (C) Paul Mackerras 1997.
+ *
+ *   Matt Porter <mporter@kernel.crashing.org>
+ *   Copyright 2002-2005 MontaVista Software Inc.
+ *
+ *   Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
+ *   Copyright (c) 2003, 2004 Zultys Technologies
+ *
+ *    Copyright 2007 David Gibson, IBM Corporation.
+ *    Copyright 2010 Ben. Herrenschmidt, IBM Corporation.
+ *    Copyright © 2011 David Kleikamp IBM Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#include <stdarg.h>
+#include <stddef.h>
+#include "types.h"
+#include "elf.h"
+#include "string.h"
+#include "stdio.h"
+#include "page.h"
+#include "ops.h"
+#include "reg.h"
+#include "io.h"
+#include "dcr.h"
+#include "4xx.h"
+#include "44x.h"
+#include "libfdt.h"
+
+#define DBG(fmt...)
+
+BSS_STACK(4096);
+
+#define MAX_RANKS	0x4
+#define DDR3_MR0CF	0x80010011U
+
+static unsigned long long ibm_currituck_memsize;
+static void ibm_currituck_detect_memsize(void)
+{
+	u32 reg;
+	unsigned i;
+
+	ibm_currituck_memsize = 0;
+	DBG("%s: initial memsize=0x%016llx\r\n", __func__,
+	    ibm_currituck_memsize);
+
+	for(i = 0; i < MAX_RANKS; i++){
+		reg = mfdcrx(DDR3_MR0CF + i);
+		printf("%s: reg=0x%08x\r\n", __func__, reg);
+		if (reg & 0x01) {
+			reg &= 0x0000f000;
+			reg >>= 12;
+			DBG("%s: reg=0x%08x, mem=0x%016llx\r\n",
+			    __func__, reg, (0x800000ULL << reg));
+			ibm_currituck_memsize += (0x800000ULL << reg);
+			DBG("%s: memsize=0x%016llx\r\n", __func__, ibm_currituck_memsize);
+		}
+	}
+
+	DBG("\r\n\r\n");
+}
+
+static void ibm_currituck_fixups(void)
+{
+	int i;
+	void *devp = finddevice("/");
+	u32 dma_ranges[7];
+
+	dt_fixup_memory(0x0ULL,  ibm_currituck_memsize);
+
+	while ((devp = find_node_by_devtype(devp, "pci"))) {
+		if (getprop(devp, "dma-ranges", &dma_ranges[0], sizeof(dma_ranges)) < 0) {
+			printf("%s: Failed to get dma-ranges\r\n", __func__);
+			continue;
+		}
+
+		dma_ranges[5] = ibm_currituck_memsize >> 32;
+		dma_ranges[6] = ibm_currituck_memsize & 0xffffffffUL;
+
+		setprop(devp, "dma-ranges", &dma_ranges[0], sizeof(dma_ranges));
+		DBG("%s: Setting DMA-ranges to <0x%x", __func__, dma_ranges[0]);
+		for (i = 1; i < 7; i++)
+			DBG(" 0x%x", dma_ranges[i]);
+		DBG(">\n\r");
+	}
+}
+
+#define SPRN_PIR	0x11E	/* Processor Indentification Register */
+void platform_init(void)
+{
+	/* Cap the zImage to 512MB */
+	unsigned long end_of_ram = 0x20000000;
+	unsigned long avail_ram = end_of_ram - (unsigned long)_end;
+	u32 pir_reg;
+	int node, size;
+	const u32 *timebase;
+
+	simple_alloc_init(_end, avail_ram, 128, 64);
+	platform_ops.fixups = ibm_currituck_fixups;
+	platform_ops.exit = ibm44x_dbcr_reset;
+	pir_reg = mfspr(SPRN_PIR);
+
+	/* Make sure FDT blob is sane */
+	if (fdt_check_header(_dtb_start) != 0)
+		fatal("Invalid device tree blob\n");
+
+	node = fdt_node_offset_by_prop_value(_dtb_start, -1, "device_type",
+	                                     "cpu", sizeof("cpu"));
+	if (!node)
+		fatal("Cannot find cpu node\n");
+	/* FIXME: Check this works */
+	timebase = fdt_getprop(_dtb_start, node, "timebase-frequency", &size);
+	if (timebase && (size == 4))
+		timebase_period_ns = 1000000000 / *timebase;
+
+	fdt_set_boot_cpuid_phys(_dtb_start, pir_reg);
+	fdt_init(_dtb_start);
+
+	serial_console_init();
+
+	ibm_currituck_detect_memsize();
+}
diff --git a/arch/powerpc/boot/wrapper b/arch/powerpc/boot/wrapper
index c74531a..87f4950 100755
--- a/arch/powerpc/boot/wrapper
+++ b/arch/powerpc/boot/wrapper
@@ -244,6 +244,9 @@ gamecube|wii)
     link_address='0x600000'
     platformo="$object/$platform-head.o $object/$platform.o"
     ;;
+treeboot-currituck)
+    link_address='0x1000000'
+    ;;
 treeboot-iss4xx-mpic)
     platformo="$object/treeboot-iss4xx.o"
     ;;
diff --git a/arch/powerpc/configs/44x/currituck_defconfig b/arch/powerpc/configs/44x/currituck_defconfig
new file mode 100644
index 0000000..4192322
--- /dev/null
+++ b/arch/powerpc/configs/44x/currituck_defconfig
@@ -0,0 +1,110 @@
+CONFIG_44x=y
+CONFIG_SMP=y
+CONFIG_EXPERIMENTAL=y
+CONFIG_SYSVIPC=y
+CONFIG_POSIX_MQUEUE=y
+CONFIG_SPARSE_IRQ=y
+CONFIG_LOG_BUF_SHIFT=14
+CONFIG_EXPERT=y
+CONFIG_KALLSYMS_ALL=y
+CONFIG_PROFILING=y
+CONFIG_OPROFILE=y
+CONFIG_MODULES=y
+CONFIG_MODULE_UNLOAD=y
+# CONFIG_BLK_DEV_BSG is not set
+CONFIG_PPC_47x=y
+# CONFIG_EBONY is not set
+CONFIG_CURRITUCK=y
+CONFIG_HIGHMEM=y
+CONFIG_HZ_100=y
+CONFIG_MATH_EMULATION=y
+CONFIG_IRQ_ALL_CPUS=y
+CONFIG_CMDLINE_BOOL=y
+CONFIG_CMDLINE=""
+# CONFIG_SUSPEND is not set
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_UNIX=y
+CONFIG_INET=y
+CONFIG_IP_PNP=y
+CONFIG_IP_PNP_DHCP=y
+CONFIG_IP_PNP_BOOTP=y
+# CONFIG_INET_XFRM_MODE_TRANSPORT is not set
+# CONFIG_INET_XFRM_MODE_TUNNEL is not set
+# CONFIG_INET_XFRM_MODE_BEET is not set
+# CONFIG_INET_LRO is not set
+# CONFIG_IPV6 is not set
+CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
+CONFIG_DEVTMPFS=y
+CONFIG_DEVTMPFS_MOUNT=y
+CONFIG_CONNECTOR=y
+CONFIG_MTD=y
+CONFIG_MTD_CHAR=y
+CONFIG_MTD_BLOCK=y
+CONFIG_MTD_JEDECPROBE=y
+CONFIG_MTD_CFI_AMDSTD=y
+CONFIG_MTD_PHYSMAP_OF=y
+CONFIG_PROC_DEVICETREE=y
+CONFIG_BLK_DEV_RAM=y
+CONFIG_BLK_DEV_RAM_SIZE=35000
+# CONFIG_SCSI_PROC_FS is not set
+CONFIG_BLK_DEV_SD=y
+# CONFIG_SCSI_LOWLEVEL is not set
+CONFIG_ATA=y
+# CONFIG_SATA_PMP is not set
+CONFIG_SATA_SIL24=y
+# CONFIG_ATA_SFF is not set
+CONFIG_NETDEVICES=y
+CONFIG_E1000E=y
+# CONFIG_NETDEV_10000 is not set
+# CONFIG_INPUT is not set
+# CONFIG_SERIO is not set
+# CONFIG_VT is not set
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_SERIAL_8250_EXTENDED=y
+CONFIG_SERIAL_8250_SHARE_IRQ=y
+CONFIG_SERIAL_OF_PLATFORM=y
+# CONFIG_HW_RANDOM is not set
+CONFIG_I2C=y
+CONFIG_I2C_IBM_IIC=y
+# CONFIG_HWMON is not set
+CONFIG_THERMAL=y
+CONFIG_USB=y
+CONFIG_USB_DEBUG=y
+CONFIG_USB_EHCI_HCD=y
+CONFIG_USB_OHCI_HCD=y
+CONFIG_RTC_CLASS=y
+CONFIG_RTC_DRV_M41T80=y
+CONFIG_EXT2_FS=y
+CONFIG_EXT3_FS=y
+# CONFIG_EXT3_DEFAULTS_TO_ORDERED is not set
+CONFIG_EXT3_FS_POSIX_ACL=y
+CONFIG_EXT3_FS_SECURITY=y
+CONFIG_PROC_KCORE=y
+CONFIG_TMPFS=y
+CONFIG_CRAMFS=y
+CONFIG_NFS_FS=y
+CONFIG_NFS_V3=y
+CONFIG_NFS_V3_ACL=y
+CONFIG_NFS_V4=y
+CONFIG_NLS_DEFAULT="n"
+CONFIG_MAGIC_SYSRQ=y
+CONFIG_DEBUG_FS=y
+CONFIG_DEBUG_KERNEL=y
+CONFIG_DETECT_HUNG_TASK=y
+CONFIG_DEBUG_INFO=y
+CONFIG_SYSCTL_SYSCALL_CHECK=y
+CONFIG_XMON=y
+CONFIG_XMON_DEFAULT=y
+CONFIG_PPC_EARLY_DEBUG=y
+CONFIG_PPC_EARLY_DEBUG_44x_PHYSLOW=0x10000000
+CONFIG_PPC_EARLY_DEBUG_44x_PHYSHIGH=0x200
+CONFIG_CRYPTO=y
+CONFIG_CRYPTO_CBC=y
+CONFIG_CRYPTO_ECB=y
+CONFIG_CRYPTO_PCBC=y
+CONFIG_CRYPTO_MD5=y
+CONFIG_CRYPTO_DES=y
+# CONFIG_CRYPTO_ANSI_CPRNG is not set
+# CONFIG_CRYPTO_HW is not set
diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h
index 559da19..aa38de6 100644
--- a/arch/powerpc/include/asm/reg.h
+++ b/arch/powerpc/include/asm/reg.h
@@ -951,6 +951,7 @@
 #define PVR_403GCX	0x00201400
 #define PVR_405GP	0x40110000
 #define PVR_476		0x11a52000
+#define PVR_476CURRITUCK	0x7ff50000
 #define PVR_STB03XXX	0x40310000
 #define PVR_NP405H	0x41410000
 #define PVR_NP405L	0x41610000
diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
index edae5bb..02e0749 100644
--- a/arch/powerpc/kernel/cputable.c
+++ b/arch/powerpc/kernel/cputable.c
@@ -1830,6 +1830,20 @@ static struct cpu_spec __initdata cpu_specs[] = {
 		.machine_check		= machine_check_47x,
 		.platform		= "ppc470",
 	},
+	{ /* 476 core Currituck */
+		.pvr_mask		= 0xffff0000,
+		.pvr_value		= 0x7ff50000,
+		.cpu_name		= "476",
+		.cpu_features		= CPU_FTRS_47X | CPU_FTR_476_DD2,
+		.cpu_user_features	= COMMON_USER_BOOKE |
+			PPC_FEATURE_HAS_FPU,
+		.mmu_features		= MMU_FTR_TYPE_47x |
+			MMU_FTR_USE_TLBIVAX_BCAST | MMU_FTR_LOCK_BCAST_INVAL,
+		.icache_bsize		= 32,
+		.dcache_bsize		= 128,
+		.machine_check		= machine_check_47x,
+		.platform		= "ppc470",
+	},
 	{ /* 476 iss */
 		.pvr_mask		= 0xffff0000,
 		.pvr_value		= 0x00050000,
diff --git a/arch/powerpc/kernel/head_44x.S b/arch/powerpc/kernel/head_44x.S
index b725dab..3aca1e2 100644
--- a/arch/powerpc/kernel/head_44x.S
+++ b/arch/powerpc/kernel/head_44x.S
@@ -732,6 +732,8 @@ _GLOBAL(init_cpu_state)
 	/* We use the PVR to differenciate 44x cores from 476 */
 	mfspr	r3,SPRN_PVR
 	srwi	r3,r3,16
+	cmplwi	cr0,r3,PVR_476CURRITUCK@h
+	beq	head_start_47x
 	cmplwi	cr0,r3,PVR_476@h
 	beq	head_start_47x
 	cmplwi	cr0,r3,PVR_476_ISS@h
diff --git a/arch/powerpc/platforms/44x/Kconfig b/arch/powerpc/platforms/44x/Kconfig
index 762322c..245d121 100644
--- a/arch/powerpc/platforms/44x/Kconfig
+++ b/arch/powerpc/platforms/44x/Kconfig
@@ -186,6 +186,16 @@ config ISS4xx
 	help
 	  This option enables support for the IBM ISS simulation environment
 
+config CURRITUCK
+	bool "IBM Currituck (476fpe) Support"
+	depends on PPC_47x
+	default n
+	select SWIOTLB
+	select PPC_FPU
+	select PPC4xx_PCI_EXPRESS
+	help
+	  This option enables support for the IBM Currituck (476fpe) evaluation board
+
 config ICON
 	bool "Icon"
 	depends on 44x
diff --git a/arch/powerpc/platforms/44x/Makefile b/arch/powerpc/platforms/44x/Makefile
index 553db60..5cd2725 100644
--- a/arch/powerpc/platforms/44x/Makefile
+++ b/arch/powerpc/platforms/44x/Makefile
@@ -10,3 +10,4 @@ obj-$(CONFIG_XILINX_VIRTEX_5_FXT) += virtex.o
 obj-$(CONFIG_XILINX_ML510) += virtex_ml510.o
 obj-$(CONFIG_ISS4xx)	+= iss4xx.o
 obj-$(CONFIG_CANYONLANDS)+= canyonlands.o
+obj-$(CONFIG_PPC_47x)	+= ppc47x.o
diff --git a/arch/powerpc/platforms/44x/ppc47x.c b/arch/powerpc/platforms/44x/ppc47x.c
new file mode 100644
index 0000000..a4989b1
--- /dev/null
+++ b/arch/powerpc/platforms/44x/ppc47x.c
@@ -0,0 +1,198 @@
+/*
+ * Currituck board specific routines
+ *
+ * Copyright © 2011 Tony Breeds IBM Corporation
+ *
+ * Based on earlier code:
+ *    Matt Porter <mporter@kernel.crashing.org>
+ *    Copyright 2002-2005 MontaVista Software Inc.
+ *
+ *    Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
+ *    Copyright (c) 2003-2005 Zultys Technologies
+ *
+ *    Rewritten and ported to the merged powerpc tree:
+ *    Copyright 2007 David Gibson <dwg@au1.ibm.com>, IBM Corporation.
+ *    Copyright © 2011 David Kliekamp IBM Corporation
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/init.h>
+#include <linux/memblock.h>
+#include <linux/of_platform.h>
+#include <linux/rtc.h>
+
+#include <asm/machdep.h>
+#include <asm/prom.h>
+#include <asm/udbg.h>
+#include <asm/time.h>
+#include <asm/uic.h>
+#include <asm/ppc4xx.h>
+#include <asm/mpic.h>
+#include <asm/mmu.h>
+
+#include <linux/pci.h>
+
+static __initdata struct of_device_id ppc47x_of_bus[] = {
+	{ .compatible = "ibm,plb4", },
+	{ .compatible = "ibm,plb6", },
+	{ .compatible = "ibm,opb", },
+	{ .compatible = "ibm,ebc", },
+	{},
+};
+
+static void __devinit quirk_ppc_currituck_usb_fixup(struct pci_dev *dev)
+{
+	pci_write_config_dword(dev, 0xe0, 0x0114231f);
+	pci_write_config_dword(dev, 0xe4, 0x00006c40);
+}
+DECLARE_PCI_FIXUP_HEADER(0x1033, 0x0035, quirk_ppc_currituck_usb_fixup);
+
+static int __init ppc47x_device_probe(void)
+{
+	of_platform_bus_probe(NULL, ppc47x_of_bus, NULL);
+
+	return 0;
+}
+machine_device_initcall(ppc47x, ppc47x_device_probe);
+
+/* We can have either UICs or MPICs */
+static void __init ppc47x_init_irq(void)
+{
+	struct device_node *np;
+
+	/* Find top level interrupt controller */
+	for_each_node_with_property(np, "interrupt-controller") {
+		if (of_get_property(np, "interrupts", NULL) == NULL)
+			break;
+	}
+	if (np == NULL)
+		panic("Can't find top level interrupt controller");
+
+	/* Check type and do appropriate initialization */
+	if (of_device_is_compatible(np, "chrp,open-pic")) {
+		/* The MPIC driver will get everything it needs from the
+		 * device-tree, just pass 0 to all arguments
+		 */
+		struct mpic *mpic =
+			mpic_alloc(np, 0, MPIC_PRIMARY, 0, 0, " MPIC     ");
+		BUG_ON(mpic == NULL);
+		mpic_init(mpic);
+		ppc_md.get_irq = mpic_get_irq;
+	} else
+		panic("Unrecognized top level interrupt controller");
+}
+
+#ifdef CONFIG_SMP
+static void __cpuinit smp_ppc47x_setup_cpu(int cpu)
+{
+	mpic_setup_this_cpu();
+}
+
+static int __cpuinit smp_ppc47x_kick_cpu(int cpu)
+{
+	struct device_node *cpunode = of_get_cpu_node(cpu, NULL);
+	const u64 *spin_table_addr_prop;
+	u32 *spin_table;
+	extern void start_secondary_47x(void);
+
+	BUG_ON(cpunode == NULL);
+
+	/* Assume spin table. We could test for the enable-method in
+	 * the device-tree but currently there's little point as it's
+	 * our only supported method
+	 */
+	spin_table_addr_prop =
+		of_get_property(cpunode, "cpu-release-addr", NULL);
+
+	if (spin_table_addr_prop == NULL) {
+		pr_err("CPU%d: Can't start, missing cpu-release-addr !\n",
+		       cpu);
+		return 1;
+	}
+
+	/* Assume it's mapped as part of the linear mapping. This is a bit
+	 * fishy but will work fine for now
+	 *
+	 * XXX: Is there any reason to assume differently?
+	 */
+	spin_table = (u32 *)__va(*spin_table_addr_prop);
+	pr_debug("CPU%d: Spin table mapped at %p\n", cpu, spin_table);
+
+	spin_table[3] = cpu;
+	smp_wmb();
+	spin_table[1] = __pa(start_secondary_47x);
+	mb();
+
+	return 0;
+}
+
+static struct smp_ops_t ppc47x_smp_ops = {
+	.probe		= smp_mpic_probe,
+	.message_pass	= smp_mpic_message_pass,
+	.setup_cpu	= smp_ppc47x_setup_cpu,
+	.kick_cpu	= smp_ppc47x_kick_cpu,
+	.give_timebase	= smp_generic_give_timebase,
+	.take_timebase	= smp_generic_take_timebase,
+};
+
+static void __init ppc47x_smp_init(void)
+{
+	if (mmu_has_feature(MMU_FTR_TYPE_47x))
+		smp_ops = &ppc47x_smp_ops;
+}
+
+#else /* CONFIG_SMP */
+static void __init ppc47x_smp_init(void) { }
+#endif /* CONFIG_SMP */
+
+static void __init ppc47x_setup_arch(void)
+{
+
+	/* No need to check the DMA config as we /know/ our windows are all of
+ 	 * RAM.  Lets hope that doesn't change */
+#ifdef CONFIG_SWIOTLB
+	if (memblock_end_of_DRAM() > 0xffffffff) {
+		ppc_swiotlb_enable = 1;
+		set_pci_dma_ops(&swiotlb_dma_ops);
+		ppc_md.pci_dma_dev_setup = pci_dma_dev_setup_swiotlb;
+	}
+#endif
+	ppc47x_smp_init();
+}
+
+/*
+ * Called very early, MMU is off, device-tree isn't unflattened
+ */
+static int __init ppc47x_probe(void)
+{
+	unsigned long root = of_get_flat_dt_root();
+
+	if (!of_flat_dt_is_compatible(root, "ibm,476"))
+		return 0;
+
+	return 1;
+}
+
+static void ppc47x_pci_irq_fixup(struct pci_dev *dev)
+{
+	if (dev->vendor == 0x1033 && (dev->device == 0x0035 ||
+	                              dev->device == 0x00e0)) {
+		dev->irq = irq_create_mapping(NULL, 47);
+		pr_info("%s: Mapping irq 47 %d\n", __func__, dev->irq);
+	}
+}
+
+define_machine(ppc47x) {
+	.name			= "PowerPC 47x",
+	.probe			= ppc47x_probe,
+	.progress		= udbg_progress,
+	.init_IRQ		= ppc47x_init_irq,
+	.setup_arch		= ppc47x_setup_arch,
+	.pci_irq_fixup		= ppc47x_pci_irq_fixup,
+	.restart		= ppc4xx_reset_system,
+	.calibrate_decr		= generic_calibrate_decr,
+};
diff --git a/arch/powerpc/sysdev/ppc4xx_pci.c b/arch/powerpc/sysdev/ppc4xx_pci.c
index d766068..49b711b 100644
--- a/arch/powerpc/sysdev/ppc4xx_pci.c
+++ b/arch/powerpc/sysdev/ppc4xx_pci.c
@@ -1290,6 +1290,52 @@ static struct ppc4xx_pciex_hwops ppc405ex_pcie_hwops __initdata =
 
 #endif /* CONFIG_40x */
 
+#ifdef CONFIG_CURRITUCK
+static int __init ppc_currituck_pciex_core_init(struct device_node *np)
+{
+	return 4;
+}
+
+static void __init ppc_currituck_pciex_check_link(struct ppc4xx_pciex_port *port)
+{
+	u32 timeout_ms = 20;
+	u32 val = 0, mask = (PECFG_TLDLP_LNKUP|PECFG_TLDLP_PRESENT);
+	void __iomem *mbase = ioremap(port->cfg_space.start + 0x10000000,
+	                              0x1000);
+
+	printk(KERN_INFO "PCIE%d: Checking link...\n", port->index);
+
+	if (mbase == NULL) {
+		printk(KERN_WARNING "PCIE%d: failed to get cfg space\n",
+		                    port->index);
+		return;
+	}
+		
+	while (timeout_ms--) {
+		val = in_le32(mbase + PECFG_TLDLP);
+
+		if ((val & mask) == mask)
+			break;
+		msleep(10);
+	}
+
+	if (val & PECFG_TLDLP_PRESENT) {
+		printk(KERN_INFO "PCIE%d: link is up !\n", port->index);
+		port->link = 1;
+	} else
+		printk(KERN_WARNING "PCIE%d: Link up failed\n", port->index);
+
+	iounmap(mbase);
+	return;
+}
+
+static struct ppc4xx_pciex_hwops ppc_currituck_pcie_hwops __initdata =
+{
+	.core_init	= ppc_currituck_pciex_core_init,
+	.check_link	= ppc_currituck_pciex_check_link,
+};
+#endif /* CONFIG_CURRITUCK */
+
 /* Check that the core has been initied and if not, do it */
 static int __init ppc4xx_pciex_check_core_init(struct device_node *np)
 {
@@ -1315,6 +1361,10 @@ static int __init ppc4xx_pciex_check_core_init(struct device_node *np)
 	if (of_device_is_compatible(np, "ibm,plb-pciex-405ex"))
 		ppc4xx_pciex_hwops = &ppc405ex_pcie_hwops;
 #endif
+#ifdef CONFIG_CURRITUCK
+	if (of_device_is_compatible(np, "ibm,plb-pciex-currituck"))
+		ppc4xx_pciex_hwops = &ppc_currituck_pcie_hwops;
+#endif
 	if (ppc4xx_pciex_hwops == NULL) {
 		printk(KERN_WARNING "PCIE: unknown host type %s\n",
 		       np->full_name);
@@ -1623,6 +1673,10 @@ static int __init ppc4xx_setup_one_pciex_POM(struct ppc4xx_pciex_port	*port,
 			dcr_write(port->dcrs, DCRO_PEGPL_OMR1MSKL,
 				sa | DCRO_PEGPL_460SX_OMR1MSKL_UOT
 					| DCRO_PEGPL_OMRxMSKL_VAL);
+		else if (of_device_is_compatible(port->node, "ibm,plb-pciex-currituck"))
+			dcr_write(port->dcrs, DCRO_PEGPL_OMR1MSKL,
+				sa | DCRO_PEGPL_CURRITUCK_OMR1MSKL_UOT
+					| DCRO_PEGPL_OMRxMSKL_VAL);
 		else
 			dcr_write(port->dcrs, DCRO_PEGPL_OMR1MSKL,
 				sa | DCRO_PEGPL_OMR1MSKL_UOT
@@ -1747,7 +1801,8 @@ static void __init ppc4xx_configure_pciex_PIMs(struct ppc4xx_pciex_port *port,
 		if (res->flags & IORESOURCE_PREFETCH)
 			sa |= PCI_BASE_ADDRESS_MEM_PREFETCH;
 
-		if (of_device_is_compatible(port->node, "ibm,plb-pciex-460sx"))
+		if (of_device_is_compatible(port->node, "ibm,plb-pciex-460sx") ||
+		    of_device_is_compatible(port->node, "ibm,plb-pciex-currituck"))
 			sa |= PCI_BASE_ADDRESS_MEM_TYPE_64;
 
 		out_le32(mbase + PECFG_BAR0HMPA, RES_TO_U32_HIGH(sa));
diff --git a/arch/powerpc/sysdev/ppc4xx_pci.h b/arch/powerpc/sysdev/ppc4xx_pci.h
index 32ce763..81f60d9 100644
--- a/arch/powerpc/sysdev/ppc4xx_pci.h
+++ b/arch/powerpc/sysdev/ppc4xx_pci.h
@@ -476,6 +476,13 @@
 #define DCRO_PEGPL_OMR1MSKL_UOT	 0x00000002
 #define DCRO_PEGPL_OMR3MSKL_IO	 0x00000002
 
+/* Currituck - 476 FPE */
+#define PCCFG_LCPA			0x270
+#define PECFG_TLDLP			0x3F8
+#define PECFG_TLDLP_LNKUP		0x00000008
+#define PECFG_TLDLP_PRESENT		0x00000010
+#define DCRO_PEGPL_CURRITUCK_OMR1MSKL_UOT	 0x00000004
+
 /* SDR Bit Mappings */
 #define PESDRx_RCSSET_HLDPLB	0x10000000
 #define PESDRx_RCSSET_RSTGU	0x01000000
-- 
1.7.6.4

Re: [PATCH 1/6] 44x/pci: Continue pci setup even if there is no sdr-base in the device-tree

[Benjamin Herrenschmidt]

On Wed, 2011-11-30 at 16:23 +1100, Tony Breeds wrote:
> Signed-off-by: Tony Breeds <tony@bakeyournoodle.com>
> ---
>  arch/powerpc/sysdev/ppc4xx_pci.c |    6 +++---
>  1 files changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/arch/powerpc/sysdev/ppc4xx_pci.c b/arch/powerpc/sysdev/ppc4xx_pci.c
> index 16f5eba..d3fa380 100644
> --- a/arch/powerpc/sysdev/ppc4xx_pci.c
> +++ b/arch/powerpc/sysdev/ppc4xx_pci.c
> @@ -1974,11 +1974,11 @@ static void __init ppc4xx_probe_pciex_bridge(struct device_node *np)
>  	port->node = of_node_get(np);
>  	pval = of_get_property(np, "sdr-base", NULL);
>  	if (pval == NULL) {
> -		printk(KERN_ERR "PCIE: missing sdr-base for %s\n",
> +		printk(KERN_INFO "PCIE: missing sdr-base for %s\n",
>  		       np->full_name);

If you don't expect an sdr-base as part of the normal operations of that
bridge, don't bring a message that makes me think something is wrong :-)

Just changing the severity isn't enough. you should just remove the
message and later on, print/warn/error out if you decide you actually
need an sdr-base (such as in the backend).

Cheers,
Ben.

> -		return;
> +	} else {
> +		port->sdr_base = *pval;
>  	}
> -	port->sdr_base = *pval;
>  
>  	/* Check if device_type property is set to "pci" or "pci-endpoint".
>  	 * Resulting from this setup this PCIe port will be configured

Re: [PATCH 4/6] powerpc/boot: Add extended precision shifts to the boot wrapper.

[Benjamin Herrenschmidt]

On Wed, 2011-11-30 at 16:23 +1100, Tony Breeds wrote:
> Code copied from arch/powerpc/kernel/misc_32.S
> 
> Signed-off-by: Tony Breeds <tony@bakeyournoodle.com>
> ---
>  arch/powerpc/boot/div64.S |   52 +++++++++++++++++++++++++++++++++++++++++++++
>  1 files changed, 52 insertions(+), 0 deletions(-)

Should we just link with libgcc ? :-)

Cheers,
Ben.

> diff --git a/arch/powerpc/boot/div64.S b/arch/powerpc/boot/div64.S
> index d271ab5..bbcb8a4 100644
> --- a/arch/powerpc/boot/div64.S
> +++ b/arch/powerpc/boot/div64.S
> @@ -57,3 +57,55 @@ __div64_32:
>  	stw	r8,4(r3)
>  	mr	r3,r6		# return the remainder in r3
>  	blr
> +
> +/*
> + * Extended precision shifts.
> + *
> + * Updated to be valid for shift counts from 0 to 63 inclusive.
> + * -- Gabriel
> + *
> + * R3/R4 has 64 bit value
> + * R5    has shift count
> + * result in R3/R4
> + *
> + *  ashrdi3: arithmetic right shift (sign propagation)	
> + *  lshrdi3: logical right shift
> + *  ashldi3: left shift
> + */
> +	.globl __ashrdi3
> +__ashrdi3:
> +	subfic	r6,r5,32
> +	srw	r4,r4,r5	# LSW = count > 31 ? 0 : LSW >> count
> +	addi	r7,r5,32	# could be xori, or addi with -32
> +	slw	r6,r3,r6	# t1 = count > 31 ? 0 : MSW << (32-count)
> +	rlwinm	r8,r7,0,32	# t3 = (count < 32) ? 32 : 0
> +	sraw	r7,r3,r7	# t2 = MSW >> (count-32)
> +	or	r4,r4,r6	# LSW |= t1
> +	slw	r7,r7,r8	# t2 = (count < 32) ? 0 : t2
> +	sraw	r3,r3,r5	# MSW = MSW >> count
> +	or	r4,r4,r7	# LSW |= t2
> +	blr
> +
> +	.globl __ashldi3
> +__ashldi3:
> +	subfic	r6,r5,32
> +	slw	r3,r3,r5	# MSW = count > 31 ? 0 : MSW << count
> +	addi	r7,r5,32	# could be xori, or addi with -32
> +	srw	r6,r4,r6	# t1 = count > 31 ? 0 : LSW >> (32-count)
> +	slw	r7,r4,r7	# t2 = count < 32 ? 0 : LSW << (count-32)
> +	or	r3,r3,r6	# MSW |= t1
> +	slw	r4,r4,r5	# LSW = LSW << count
> +	or	r3,r3,r7	# MSW |= t2
> +	blr
> +
> +	.globl __lshrdi3
> +__lshrdi3:
> +	subfic	r6,r5,32
> +	srw	r4,r4,r5	# LSW = count > 31 ? 0 : LSW >> count
> +	addi	r7,r5,32	# could be xori, or addi with -32
> +	slw	r6,r3,r6	# t1 = count > 31 ? 0 : MSW << (32-count)
> +	srw	r7,r3,r7	# t2 = count < 32 ? 0 : MSW >> (count-32)
> +	or	r4,r4,r6	# LSW |= t1
> +	srw	r3,r3,r5	# MSW = MSW >> count
> +	or	r4,r4,r7	# LSW |= t2
> +	blr

Re: [PATCH 6/6] 44x/currituck: Add support for the new IBM currituck platform

[Benjamin Herrenschmidt]

On Wed, 2011-11-30 at 16:24 +1100, Tony Breeds wrote:

> +		cpu@1 {
> +			device_type = "cpu";
> +			model = "PowerPC,476";
> +			reg = <1>;
> +			clock-frequency = <1600000000>; // 1.6 GHz
> +			timebase-frequency = <100000000>; // 100Mhz
> +			i-cache-line-size = <32>;
> +			d-cache-line-size = <32>;
> +			i-cache-size = <32768>;
> +			d-cache-size = <32768>;
> +			dcr-controller;
> +			dcr-access-method = "native";
> +			status = "disabled";

disabled ? really ?

> +			enable-method = "spin-table";
> +			cpu-release-addr = <0x0 0x01f00000>;
> +		};
> +	};
> +
> +	memory {
> +		device_type = "memory";
> +		reg = <0x0 0x0 0x0 0x0>; // filled in by zImage
> +	};
> +
> +	MPIC: interrupt-controller {
> +		compatible = "chrp,open-pic";
> +		interrupt-controller;
> +		dcr-reg = <0xffc00000 0x00040000>;
> +		#address-cells = <0>;
> +		#size-cells = <0>;
> +		#interrupt-cells = <2>;
> +
> +	};
> +
> +	plb {
> +		compatible = "ibm,plb-4xx", "ibm,plb4"; /* Could be PLB6, doesn't matter */

Then make it plb6 and add it to the probe list. Might have to whack it's
configuration registers one day etc...

> +		#address-cells = <2>;
> +		#size-cells = <2>;
> +		ranges;
> +		clock-frequency = <200000000>; // 200Mhz
> +
> +		POB0: opb {
> +			compatible = "ibm,opb-4xx", "ibm,opb";
> +			#address-cells = <1>;
> +			#size-cells = <1>;
> +			/* Wish there was a nicer way of specifying a full
> +			 * 32-bit range
> +			 *
> +			 * XXX: 1 TB address space, do we really care past
> +			 * 4 GB and should we expand cell width?
> +			 */

For OPB probably not :-)

  .../...

> +#define DBG(fmt...)
> +
> +BSS_STACK(4096);
> +
> +#define MAX_RANKS	0x4
> +#define DDR3_MR0CF	0x80010011U
> +
> +static unsigned long long ibm_currituck_memsize;
> +static void ibm_currituck_detect_memsize(void)
> +{
> +	u32 reg;
> +	unsigned i;
> +
> +	ibm_currituck_memsize = 0;
> +	DBG("%s: initial memsize=0x%016llx\r\n", __func__,
> +	    ibm_currituck_memsize);

That doesn't seem like a very useful pair of statements or useful debug
message....

Any reason why you aren't returning what you detect rather than using a
global ?

> +	for(i = 0; i < MAX_RANKS; i++){
> +		reg = mfdcrx(DDR3_MR0CF + i);
> +		printf("%s: reg=0x%08x\r\n", __func__, reg);

All that debug is pretty gross, keep it if you wish but make it a bit
neater and/or wrap it in DBG

> +		if (reg & 0x01) {

	if (!(reg & 1))
		continue;

avoids too much indent

> +			reg &= 0x0000f000;
> +			reg >>= 12;
> +			DBG("%s: reg=0x%08x, mem=0x%016llx\r\n",
> +			    __func__, reg, (0x800000ULL << reg));

Similar comment about making the debug output neater

> +			ibm_currituck_memsize += (0x800000ULL << reg);
> +			DBG("%s: memsize=0x%016llx\r\n", __func__, ibm_currituck_memsize);
> +		}
> +	}
> +
> +	DBG("\r\n\r\n");
> +}
> +
> +static void ibm_currituck_fixups(void)
> +{
> +	int i;
> +	void *devp = finddevice("/");
> +	u32 dma_ranges[7];
> +
> +	dt_fixup_memory(0x0ULL,  ibm_currituck_memsize);

Ok, I see why the global... I'd still prefer if the detect function just
returned the value and the caller whacks the global.

> +	while ((devp = find_node_by_devtype(devp, "pci"))) {
> +		if (getprop(devp, "dma-ranges", &dma_ranges[0], sizeof(dma_ranges)) < 0) {

Can't you replace &dma_ranges[0] with just dma_ranges ?

> +			printf("%s: Failed to get dma-ranges\r\n", __func__);
> +			continue;
> +		}
> +
> +		dma_ranges[5] = ibm_currituck_memsize >> 32;
> +		dma_ranges[6] = ibm_currituck_memsize & 0xffffffffUL;
> +
> +		setprop(devp, "dma-ranges", &dma_ranges[0], sizeof(dma_ranges));

Ditto.

> +		DBG("%s: Setting DMA-ranges to <0x%x", __func__, dma_ranges[0]);
> +		for (i = 1; i < 7; i++)
> +			DBG(" 0x%x", dma_ranges[i]);
> +		DBG(">\n\r");

Do you really need that added debug ? Once you've displayed the memory
size and tested that code once it doesn't look like you really care much
anymore

> +	}
> +}
> +
> +#define SPRN_PIR	0x11E	/* Processor Indentification Register */

That should go elsewhere along with the other SPR definitions.

> +void platform_init(void)
> +{
> +	/* Cap the zImage to 512MB */

Any reason ? If yes, please document it a bit more.

> +	unsigned long end_of_ram = 0x20000000;
> +	unsigned long avail_ram = end_of_ram - (unsigned long)_end;
> +	u32 pir_reg;
> +	int node, size;
> +	const u32 *timebase;
> +
> +	simple_alloc_init(_end, avail_ram, 128, 64);
> +	platform_ops.fixups = ibm_currituck_fixups;
> +	platform_ops.exit = ibm44x_dbcr_reset;
> +	pir_reg = mfspr(SPRN_PIR);
> +
> +	/* Make sure FDT blob is sane */
> +	if (fdt_check_header(_dtb_start) != 0)
> +		fatal("Invalid device tree blob\n");
> +
> +	node = fdt_node_offset_by_prop_value(_dtb_start, -1, "device_type",
> +	                                     "cpu", sizeof("cpu"));
> +	if (!node)
> +		fatal("Cannot find cpu node\n");

The above will return -a- CPU node... you have several and you don't
know which one. You should probably iterate accross all of them.

> +	/* FIXME: Check this works */
> +	timebase = fdt_getprop(_dtb_start, node, "timebase-frequency", &size);
> +	if (timebase && (size == 4))
> +		timebase_period_ns = 1000000000 / *timebase;
> +
> +	fdt_set_boot_cpuid_phys(_dtb_start, pir_reg);
> +	fdt_init(_dtb_start);
> +
> +	serial_console_init();
> +
> +	ibm_currituck_detect_memsize();
> +}

> diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h
> index 559da19..aa38de6 100644
> --- a/arch/powerpc/include/asm/reg.h
> +++ b/arch/powerpc/include/asm/reg.h
> @@ -951,6 +951,7 @@
>  #define PVR_403GCX	0x00201400
>  #define PVR_405GP	0x40110000
>  #define PVR_476		0x11a52000
> +#define PVR_476CURRITUCK	0x7ff50000

My understanding is that the currituck was the platform, not the chip,
and that the chip was called something like 476FPE, am I wrong ?

>  #define PVR_STB03XXX	0x40310000
>  #define PVR_NP405H	0x41410000
>  #define PVR_NP405L	0x41610000
> diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
> index edae5bb..02e0749 100644
> --- a/arch/powerpc/kernel/cputable.c
> +++ b/arch/powerpc/kernel/cputable.c
> @@ -1830,6 +1830,20 @@ static struct cpu_spec __initdata cpu_specs[] = {
>  		.machine_check		= machine_check_47x,
>  		.platform		= "ppc470",
>  	},
> +	{ /* 476 core Currituck */
> +		.pvr_mask		= 0xffff0000,
> +		.pvr_value		= 0x7ff50000,
> +		.cpu_name		= "476",
> +		.cpu_features		= CPU_FTRS_47X | CPU_FTR_476_DD2,
> +		.cpu_user_features	= COMMON_USER_BOOKE |
> +			PPC_FEATURE_HAS_FPU,
> +		.mmu_features		= MMU_FTR_TYPE_47x |
> +			MMU_FTR_USE_TLBIVAX_BCAST | MMU_FTR_LOCK_BCAST_INVAL,
> +		.icache_bsize		= 32,
> +		.dcache_bsize		= 128,
> +		.machine_check		= machine_check_47x,
> +		.platform		= "ppc470",
> +	},

Same comment.

>  	{ /* 476 iss */
>  		.pvr_mask		= 0xffff0000,
>  		.pvr_value		= 0x00050000,
> diff --git a/arch/powerpc/kernel/head_44x.S b/arch/powerpc/kernel/head_44x.S
> index b725dab..3aca1e2 100644
> --- a/arch/powerpc/kernel/head_44x.S
> +++ b/arch/powerpc/kernel/head_44x.S
> @@ -732,6 +732,8 @@ _GLOBAL(init_cpu_state)
>  	/* We use the PVR to differenciate 44x cores from 476 */
>  	mfspr	r3,SPRN_PVR
>  	srwi	r3,r3,16
> +	cmplwi	cr0,r3,PVR_476CURRITUCK@h
> +	beq	head_start_47x

So at some point, they gave us the magic foo to do with the PVR to
identify any 476... I'll try to dig that out of my email archives.

>  	cmplwi	cr0,r3,PVR_476@h
>  	beq	head_start_47x
>  	cmplwi	cr0,r3,PVR_476_ISS@h
> diff --git a/arch/powerpc/platforms/44x/Kconfig b/arch/powerpc/platforms/44x/Kconfig
> index 762322c..245d121 100644
> --- a/arch/powerpc/platforms/44x/Kconfig
> +++ b/arch/powerpc/platforms/44x/Kconfig
> @@ -186,6 +186,16 @@ config ISS4xx
>  	help
>  	  This option enables support for the IBM ISS simulation environment
>  
> +config CURRITUCK
> +	bool "IBM Currituck (476fpe) Support"
> +	depends on PPC_47x
> +	default n
> +	select SWIOTLB
> +	select PPC_FPU
> +	select PPC4xx_PCI_EXPRESS
> +	help
> +	  This option enables support for the IBM Currituck (476fpe) evaluation board
> +
>
>  config ICON
>  	bool "Icon"
>  	depends on 44x
> diff --git a/arch/powerpc/platforms/44x/Makefile b/arch/powerpc/platforms/44x/Makefile
> index 553db60..5cd2725 100644
> --- a/arch/powerpc/platforms/44x/Makefile
> +++ b/arch/powerpc/platforms/44x/Makefile
> @@ -10,3 +10,4 @@ obj-$(CONFIG_XILINX_VIRTEX_5_FXT) += virtex.o
>  obj-$(CONFIG_XILINX_ML510) += virtex_ml510.o
>  obj-$(CONFIG_ISS4xx)	+= iss4xx.o
>  obj-$(CONFIG_CANYONLANDS)+= canyonlands.o
> +obj-$(CONFIG_PPC_47x)	+= ppc47x.o
> diff --git a/arch/powerpc/platforms/44x/ppc47x.c b/arch/powerpc/platforms/44x/ppc47x.c
> new file mode 100644
> index 0000000..a4989b1
> --- /dev/null
> +++ b/arch/powerpc/platforms/44x/ppc47x.c

Call the file currituck.c

> @@ -0,0 +1,198 @@
> +/*
> + * Currituck board specific routines
> + *
> + * Copyright © 2011 Tony Breeds IBM Corporation
> + *
> + * Based on earlier code:
> + *    Matt Porter <mporter@kernel.crashing.org>
> + *    Copyright 2002-2005 MontaVista Software Inc.
> + *
> + *    Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
> + *    Copyright (c) 2003-2005 Zultys Technologies
> + *
> + *    Rewritten and ported to the merged powerpc tree:
> + *    Copyright 2007 David Gibson <dwg@au1.ibm.com>, IBM Corporation.
> + *    Copyright © 2011 David Kliekamp IBM Corporation
> + *
> + * This program is free software; you can redistribute  it and/or modify it
> + * under  the terms of  the GNU General  Public License as published by the
> + * Free Software Foundation;  either version 2 of the  License, or (at your
> + * option) any later version.
> + */
> +
> +#include <linux/init.h>
> +#include <linux/memblock.h>
> +#include <linux/of_platform.h>
> +#include <linux/rtc.h>
> +
> +#include <asm/machdep.h>
> +#include <asm/prom.h>
> +#include <asm/udbg.h>
> +#include <asm/time.h>
> +#include <asm/uic.h>
> +#include <asm/ppc4xx.h>
> +#include <asm/mpic.h>
> +#include <asm/mmu.h>
> +
> +#include <linux/pci.h>
> +
> +static __initdata struct of_device_id ppc47x_of_bus[] = {
> +	{ .compatible = "ibm,plb4", },
> +	{ .compatible = "ibm,plb6", },
> +	{ .compatible = "ibm,opb", },
> +	{ .compatible = "ibm,ebc", },
> +	{},
> +};
> +
> +static void __devinit quirk_ppc_currituck_usb_fixup(struct pci_dev *dev)
> +{
> +	pci_write_config_dword(dev, 0xe0, 0x0114231f);
> +	pci_write_config_dword(dev, 0xe4, 0x00006c40);
> +}

Pleae document better what you are doing here and also test
that you are indeed on the right platform so you don't end up
whacking bits on USB controllers on other platforms that happen
to be compiled in the same binary.

> +DECLARE_PCI_FIXUP_HEADER(0x1033, 0x0035, quirk_ppc_currituck_usb_fixup);
> +
> +static int __init ppc47x_device_probe(void)
> +{
> +	of_platform_bus_probe(NULL, ppc47x_of_bus, NULL);
> +
> +	return 0;
> +}
> +machine_device_initcall(ppc47x, ppc47x_device_probe);
> +
> +/* We can have either UICs or MPICs */
> +static void __init ppc47x_init_irq(void)
> +{
> +	struct device_node *np;
> +
> +	/* Find top level interrupt controller */
> +	for_each_node_with_property(np, "interrupt-controller") {
> +		if (of_get_property(np, "interrupts", NULL) == NULL)
> +			break;
> +	}
> +	if (np == NULL)
> +		panic("Can't find top level interrupt controller");
> +
> +	/* Check type and do appropriate initialization */
> +	if (of_device_is_compatible(np, "chrp,open-pic")) {
> +		/* The MPIC driver will get everything it needs from the
> +		 * device-tree, just pass 0 to all arguments
> +		 */
> +		struct mpic *mpic =
> +			mpic_alloc(np, 0, MPIC_PRIMARY, 0, 0, " MPIC     ");
> +		BUG_ON(mpic == NULL);
> +		mpic_init(mpic);
> +		ppc_md.get_irq = mpic_get_irq;
> +	} else
> +		panic("Unrecognized top level interrupt controller");
> +}

Ok, I'll have to fixup that vs. Kyle patches but the good thing is that
it will make things even simpler.

> +#ifdef CONFIG_SMP
> +static void __cpuinit smp_ppc47x_setup_cpu(int cpu)
> +{
> +	mpic_setup_this_cpu();
> +}
> +
> +static int __cpuinit smp_ppc47x_kick_cpu(int cpu)
> +{
> +	struct device_node *cpunode = of_get_cpu_node(cpu, NULL);
> +	const u64 *spin_table_addr_prop;
> +	u32 *spin_table;
> +	extern void start_secondary_47x(void);
> +
> +	BUG_ON(cpunode == NULL);
> +
> +	/* Assume spin table. We could test for the enable-method in
> +	 * the device-tree but currently there's little point as it's
> +	 * our only supported method
> +	 */
> +	spin_table_addr_prop =
> +		of_get_property(cpunode, "cpu-release-addr", NULL);
> +
> +	if (spin_table_addr_prop == NULL) {
> +		pr_err("CPU%d: Can't start, missing cpu-release-addr !\n",
> +		       cpu);
> +		return 1;
> +	}
> +
> +	/* Assume it's mapped as part of the linear mapping. This is a bit
> +	 * fishy but will work fine for now
> +	 *
> +	 * XXX: Is there any reason to assume differently?
> +	 */
> +	spin_table = (u32 *)__va(*spin_table_addr_prop);
> +	pr_debug("CPU%d: Spin table mapped at %p\n", cpu, spin_table);
> +
> +	spin_table[3] = cpu;
> +	smp_wmb();
> +	spin_table[1] = __pa(start_secondary_47x);
> +	mb();
> +
> +	return 0;
> +}

Now pretty much everything in this platform file is generic I believe.
We could move it all to ppc44x_simple.c. The only things that are not
are the USB quirk and the interrupt fixup.

The USB quirk which should have a compatible test for the platform to
make sure we don't run it on something else. For such a simple quirk, I
think it's fine ot have it in ppc44x_simple.c or in drivers/pci/quirk.c

For the interrupt fixup, we can probably address it entirely in the
device-tree, though that means exposing a bunch of on-board bridges
which is only midly annoying.

Anyways, we can discuss that (or maybe an even better option)
tomorrow :-) 

> +static struct smp_ops_t ppc47x_smp_ops = {
> +	.probe		= smp_mpic_probe,
> +	.message_pass	= smp_mpic_message_pass,
> +	.setup_cpu	= smp_ppc47x_setup_cpu,
> +	.kick_cpu	= smp_ppc47x_kick_cpu,
> +	.give_timebase	= smp_generic_give_timebase,
> +	.take_timebase	= smp_generic_take_timebase,
> +};
> +
> +static void __init ppc47x_smp_init(void)
> +{
> +	if (mmu_has_feature(MMU_FTR_TYPE_47x))
> +		smp_ops = &ppc47x_smp_ops;
> +}
> +
> +#else /* CONFIG_SMP */
> +static void __init ppc47x_smp_init(void) { }
> +#endif /* CONFIG_SMP */
> +
> +static void __init ppc47x_setup_arch(void)
> +{
> +
> +	/* No need to check the DMA config as we /know/ our windows are all of
> + 	 * RAM.  Lets hope that doesn't change */
> +#ifdef CONFIG_SWIOTLB
> +	if (memblock_end_of_DRAM() > 0xffffffff) {
> +		ppc_swiotlb_enable = 1;
> +		set_pci_dma_ops(&swiotlb_dma_ops);
> +		ppc_md.pci_dma_dev_setup = pci_dma_dev_setup_swiotlb;
> +	}
> +#endif
> +	ppc47x_smp_init();
> +}
> +
> +/*
> + * Called very early, MMU is off, device-tree isn't unflattened
> + */
> +static int __init ppc47x_probe(void)
> +{
> +	unsigned long root = of_get_flat_dt_root();
> +
> +	if (!of_flat_dt_is_compatible(root, "ibm,476"))
> +		return 0;

> +	return 1;
> +}
> +
> +static void ppc47x_pci_irq_fixup(struct pci_dev *dev)
> +{
> +	if (dev->vendor == 0x1033 && (dev->device == 0x0035 ||
> +	                              dev->device == 0x00e0)) {
> +		dev->irq = irq_create_mapping(NULL, 47);
> +		pr_info("%s: Mapping irq 47 %d\n", __func__, dev->irq);
> +	}
> +}
> +
> +define_machine(ppc47x) {
> +	.name			= "PowerPC 47x",
> +	.probe			= ppc47x_probe,
> +	.progress		= udbg_progress,
> +	.init_IRQ		= ppc47x_init_irq,
> +	.setup_arch		= ppc47x_setup_arch,
> +	.pci_irq_fixup		= ppc47x_pci_irq_fixup,
> +	.restart		= ppc4xx_reset_system,
> +	.calibrate_decr		= generic_calibrate_decr,
> +};
> diff --git a/arch/powerpc/sysdev/ppc4xx_pci.c b/arch/powerpc/sysdev/ppc4xx_pci.c
> index d766068..49b711b 100644
> --- a/arch/powerpc/sysdev/ppc4xx_pci.c
> +++ b/arch/powerpc/sysdev/ppc4xx_pci.c
> @@ -1290,6 +1290,52 @@ static struct ppc4xx_pciex_hwops ppc405ex_pcie_hwops __initdata =
>  
>  #endif /* CONFIG_40x */
>  
> +#ifdef CONFIG_CURRITUCK

Again, you are mixing the SoC with the board here. afaik, currituck is
the board, not the SoC.

> +static int __init ppc_currituck_pciex_core_init(struct device_node *np)
> +{
> +	return 4;
> +}
> +
> +static void __init ppc_currituck_pciex_check_link(struct ppc4xx_pciex_port *port)
> +{
> +	u32 timeout_ms = 20;
> +	u32 val = 0, mask = (PECFG_TLDLP_LNKUP|PECFG_TLDLP_PRESENT);
> +	void __iomem *mbase = ioremap(port->cfg_space.start + 0x10000000,
> +	                              0x1000);
> +
> +	printk(KERN_INFO "PCIE%d: Checking link...\n", port->index);
> +
> +	if (mbase == NULL) {
> +		printk(KERN_WARNING "PCIE%d: failed to get cfg space\n",
> +		                    port->index);
> +		return;
> +	}
> +		
> +	while (timeout_ms--) {
> +		val = in_le32(mbase + PECFG_TLDLP);
> +
> +		if ((val & mask) == mask)
> +			break;
> +		msleep(10);
> +	}
> +
> +	if (val & PECFG_TLDLP_PRESENT) {
> +		printk(KERN_INFO "PCIE%d: link is up !\n", port->index);
> +		port->link = 1;
> +	} else
> +		printk(KERN_WARNING "PCIE%d: Link up failed\n", port->index);
> +
> +	iounmap(mbase);
> +	return;
> +}
> +
> +static struct ppc4xx_pciex_hwops ppc_currituck_pcie_hwops __initdata =
> +{
> +	.core_init	= ppc_currituck_pciex_core_init,
> +	.check_link	= ppc_currituck_pciex_check_link,
> +};
> +#endif /* CONFIG_CURRITUCK */
> +
>  /* Check that the core has been initied and if not, do it */
>  static int __init ppc4xx_pciex_check_core_init(struct device_node *np)
>  {
> @@ -1315,6 +1361,10 @@ static int __init ppc4xx_pciex_check_core_init(struct device_node *np)
>  	if (of_device_is_compatible(np, "ibm,plb-pciex-405ex"))
>  		ppc4xx_pciex_hwops = &ppc405ex_pcie_hwops;
>  #endif
> +#ifdef CONFIG_CURRITUCK
> +	if (of_device_is_compatible(np, "ibm,plb-pciex-currituck"))
> +		ppc4xx_pciex_hwops = &ppc_currituck_pcie_hwops;
> +#endif
>  	if (ppc4xx_pciex_hwops == NULL) {
>  		printk(KERN_WARNING "PCIE: unknown host type %s\n",
>  		       np->full_name);
> @@ -1623,6 +1673,10 @@ static int __init ppc4xx_setup_one_pciex_POM(struct ppc4xx_pciex_port	*port,
>  			dcr_write(port->dcrs, DCRO_PEGPL_OMR1MSKL,
>  				sa | DCRO_PEGPL_460SX_OMR1MSKL_UOT
>  					| DCRO_PEGPL_OMRxMSKL_VAL);
> +		else if (of_device_is_compatible(port->node, "ibm,plb-pciex-currituck"))
> +			dcr_write(port->dcrs, DCRO_PEGPL_OMR1MSKL,
> +				sa | DCRO_PEGPL_CURRITUCK_OMR1MSKL_UOT
> +					| DCRO_PEGPL_OMRxMSKL_VAL);
>  		else
>  			dcr_write(port->dcrs, DCRO_PEGPL_OMR1MSKL,
>  				sa | DCRO_PEGPL_OMR1MSKL_UOT
> @@ -1747,7 +1801,8 @@ static void __init ppc4xx_configure_pciex_PIMs(struct ppc4xx_pciex_port *port,
>  		if (res->flags & IORESOURCE_PREFETCH)
>  			sa |= PCI_BASE_ADDRESS_MEM_PREFETCH;
>  
> -		if (of_device_is_compatible(port->node, "ibm,plb-pciex-460sx"))
> +		if (of_device_is_compatible(port->node, "ibm,plb-pciex-460sx") ||
> +		    of_device_is_compatible(port->node, "ibm,plb-pciex-currituck"))
>  			sa |= PCI_BASE_ADDRESS_MEM_TYPE_64;
>  
>  		out_le32(mbase + PECFG_BAR0HMPA, RES_TO_U32_HIGH(sa));
> diff --git a/arch/powerpc/sysdev/ppc4xx_pci.h b/arch/powerpc/sysdev/ppc4xx_pci.h
> index 32ce763..81f60d9 100644
> --- a/arch/powerpc/sysdev/ppc4xx_pci.h
> +++ b/arch/powerpc/sysdev/ppc4xx_pci.h
> @@ -476,6 +476,13 @@
>  #define DCRO_PEGPL_OMR1MSKL_UOT	 0x00000002
>  #define DCRO_PEGPL_OMR3MSKL_IO	 0x00000002
>  
> +/* Currituck - 476 FPE */
> +#define PCCFG_LCPA			0x270
> +#define PECFG_TLDLP			0x3F8
> +#define PECFG_TLDLP_LNKUP		0x00000008
> +#define PECFG_TLDLP_PRESENT		0x00000010
> +#define DCRO_PEGPL_CURRITUCK_OMR1MSKL_UOT	 0x00000004
> +
>  /* SDR Bit Mappings */
>  #define PESDRx_RCSSET_HLDPLB	0x10000000
>  #define PESDRx_RCSSET_RSTGU	0x01000000

Cheers,
Ben.

Re: [PATCH 6/6] 44x/currituck: Add support for the new IBM currituck platform

[David Gibson]

On Wed, Nov 30, 2011 at 05:20:22PM +1100, Benjamin Herrenschmidt wrote:
> On Wed, 2011-11-30 at 16:24 +1100, Tony Breeds wrote:
> 
> > +		cpu@1 {
> > +			device_type = "cpu";
> > +			model = "PowerPC,476";
> > +			reg = <1>;
> > +			clock-frequency = <1600000000>; // 1.6 GHz
> > +			timebase-frequency = <100000000>; // 100Mhz
> > +			i-cache-line-size = <32>;
> > +			d-cache-line-size = <32>;
> > +			i-cache-size = <32768>;
> > +			d-cache-size = <32768>;
> > +			dcr-controller;
> > +			dcr-access-method = "native";
> > +			status = "disabled";
> 
> disabled ? really ?

This is ePAPR.  All non-boot CPUs are supposed to have status =
"disabled" to indicate that they won't be available until explicitly
enabled via the enable-method.

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson

Re: [PATCH 3/6] 44x: Removing dead CONFIG_PPC47x

[Josh Boyer]

On Wed, Nov 30, 2011 at 12:23 AM, Tony Breeds <tony@bakeyournoodle.com> wro=
te:
> From: Christoph Egger <siccegge@cs.fau.de>
>
> CONFIG_PPC47x doesn't exist in Kconfig, therefore removing all
> references for it from the source code.
>
> Signed-off-by: Christoph Egger <siccegge@cs.fau.de>
> ---
> =A0arch/powerpc/mm/44x_mmu.c | =A0 =A04 ----
> =A01 files changed, 0 insertions(+), 4 deletions(-)
>
> diff --git a/arch/powerpc/mm/44x_mmu.c b/arch/powerpc/mm/44x_mmu.c
> index f60e006..5d4e3ff 100644
> --- a/arch/powerpc/mm/44x_mmu.c
> +++ b/arch/powerpc/mm/44x_mmu.c
> @@ -78,11 +78,7 @@ static void __init ppc44x_pin_tlb(unsigned int virt, u=
nsigned int phys)
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0"tlbwe =A0%1,%3,%5\n"
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0"tlbwe =A0%0,%3,%6\n"
> =A0 =A0 =A0 =A0:
> -#ifdef CONFIG_PPC47x
> - =A0 =A0 =A0 : "r" (PPC47x_TLB2_S_RWX),
> -#else
> =A0 =A0 =A0 =A0: "r" (PPC44x_TLB_SW | PPC44x_TLB_SR | PPC44x_TLB_SX | PPC=
44x_TLB_G),
> -#endif

That doesn't look right.  The code is there doing something, why is it
just being removed?  I would think the change would be to use
CONFIG_PPC_47x?

Or if the code there isn't needed any longer, the changelog should say why.

josh

Re: [PATCH 4/6] powerpc/boot: Add extended precision shifts to the boot wrapper.

[Josh Boyer]

On Wed, Nov 30, 2011 at 12:48 AM, Benjamin Herrenschmidt
<benh@kernel.crashing.org> wrote:
> On Wed, 2011-11-30 at 16:23 +1100, Tony Breeds wrote:
>> Code copied from arch/powerpc/kernel/misc_32.S
>>
>> Signed-off-by: Tony Breeds <tony@bakeyournoodle.com>
>> ---
>> =A0arch/powerpc/boot/div64.S | =A0 52 ++++++++++++++++++++++++++++++++++=
+++++++++++
>> =A01 files changed, 52 insertions(+), 0 deletions(-)
>
> Should we just link with libgcc ? :-)

Please tell me you're joking.

However, adding this code and wonderful and all but why do we need to
add it?  Changelog should say why.

josh

Re: [PATCH 5/6] powerpc/boot: Add mfdcrx

[Segher Boessenkool]

> +#define mfdcrx(rn) \
> +	({	\
> +		unsigned long rval; \
> +		asm volatile("mfdcrx %0,%1" : "=r"(rval) : "g"(rn)); \
> +		rval; \
> +	})

"g" is never correct on PowerPC, you want "r" here.  You can write
this as a static inline btw, you only need the #define stuff when
there is an "i" constraint involved.


Segher

Re: [PATCH 6/6] 44x/currituck: Add support for the new IBM currituck platform

[Kumar Gala]

On Nov 29, 2011, at 11:24 PM, Tony Breeds wrote:

> Based on original work by David 'Shaggy' Kliekamp.
>=20
> Signed-off-by: Tony Breeds <tony@bakeyournoodle.com>
> ---
> arch/powerpc/boot/Makefile                   |    5 +-
> arch/powerpc/boot/dts/currituck.dts          |  240 =
++++++++++++++++++++++++++
> arch/powerpc/boot/treeboot-currituck.c       |  129 ++++++++++++++
> arch/powerpc/boot/wrapper                    |    3 +
> arch/powerpc/configs/44x/currituck_defconfig |  110 ++++++++++++
> arch/powerpc/include/asm/reg.h               |    1 +
> arch/powerpc/kernel/cputable.c               |   14 ++
> arch/powerpc/kernel/head_44x.S               |    2 +
> arch/powerpc/platforms/44x/Kconfig           |   10 +
> arch/powerpc/platforms/44x/Makefile          |    1 +
> arch/powerpc/platforms/44x/ppc47x.c          |  198 =
+++++++++++++++++++++
> arch/powerpc/sysdev/ppc4xx_pci.c             |   57 ++++++-
> arch/powerpc/sysdev/ppc4xx_pci.h             |    7 +
> 13 files changed, 775 insertions(+), 2 deletions(-)
> create mode 100644 arch/powerpc/boot/dts/currituck.dts
> create mode 100644 arch/powerpc/boot/treeboot-currituck.c
> create mode 100644 arch/powerpc/configs/44x/currituck_defconfig
> create mode 100644 arch/powerpc/platforms/44x/ppc47x.c

Split the board support patches from the SoC support.



> diff --git a/arch/powerpc/include/asm/reg.h =
b/arch/powerpc/include/asm/reg.h
> index 559da19..aa38de6 100644
> --- a/arch/powerpc/include/asm/reg.h
> +++ b/arch/powerpc/include/asm/reg.h
> @@ -951,6 +951,7 @@
> #define PVR_403GCX	0x00201400
> #define PVR_405GP	0x40110000
> #define PVR_476		0x11a52000
> +#define PVR_476CURRITUCK	0x7ff50000

This seems like it should be PVR_476FPE

> #define PVR_STB03XXX	0x40310000
> #define PVR_NP405H	0x41410000
> #define PVR_NP405L	0x41610000
> diff --git a/arch/powerpc/kernel/cputable.c =
b/arch/powerpc/kernel/cputable.c
> index edae5bb..02e0749 100644
> --- a/arch/powerpc/kernel/cputable.c
> +++ b/arch/powerpc/kernel/cputable.c
> @@ -1830,6 +1830,20 @@ static struct cpu_spec __initdata cpu_specs[] =3D=
 {
> 		.machine_check		=3D machine_check_47x,
> 		.platform		=3D "ppc470",
> 	},
> +	{ /* 476 core Currituck */

comment should probably be:
	 /* 476FPE */

> +		.pvr_mask		=3D 0xffff0000,
> +		.pvr_value		=3D 0x7ff50000,
> +		.cpu_name		=3D "476",

should probably be "476FPE"

> +		.cpu_features		=3D CPU_FTRS_47X | =
CPU_FTR_476_DD2,
> +		.cpu_user_features	=3D COMMON_USER_BOOKE |
> +			PPC_FEATURE_HAS_FPU,
> +		.mmu_features		=3D MMU_FTR_TYPE_47x |
> +			MMU_FTR_USE_TLBIVAX_BCAST | =
MMU_FTR_LOCK_BCAST_INVAL,
> +		.icache_bsize		=3D 32,
> +		.dcache_bsize		=3D 128,
> +		.machine_check		=3D machine_check_47x,
> +		.platform		=3D "ppc470",
> +	},
> 	{ /* 476 iss */
> 		.pvr_mask		=3D 0xffff0000,
> 		.pvr_value		=3D 0x00050000,
> diff --git a/arch/powerpc/kernel/head_44x.S =
b/arch/powerpc/kernel/head_44x.S
> index b725dab..3aca1e2 100644
> --- a/arch/powerpc/kernel/head_44x.S
> +++ b/arch/powerpc/kernel/head_44x.S
> @@ -732,6 +732,8 @@ _GLOBAL(init_cpu_state)
> 	/* We use the PVR to differenciate 44x cores from 476 */
> 	mfspr	r3,SPRN_PVR
> 	srwi	r3,r3,16
> +	cmplwi	cr0,r3,PVR_476CURRITUCK@h
> +	beq	head_start_47x
> 	cmplwi	cr0,r3,PVR_476@h
> 	beq	head_start_47x
> 	cmplwi	cr0,r3,PVR_476_ISS@h

- k=

RE: [PATCH 5/6] powerpc/boot: Add mfdcrx

[David Laight]

=20
> > +#define mfdcrx(rn) \
> > +	({	\
> > +		unsigned long rval; \
> > +		asm volatile("mfdcrx %0,%1" : "=3Dr"(rval) : "g"(rn)); \
> > +		rval; \
> > +	})
>=20
> "g" is never correct on PowerPC, you want "r" here.  You can write
> this as a static inline btw, you only need the #define stuff when
> there is an "i" constraint involved.

I think you can still use static inlines even when a
constraint is one that requires a compile time constant.
eg (not ppc, but the "n" become part of the instruction
word):

static __inline__ uint32_t
custom_inic(const uint32_t op, uint32_t a, const uint32_t b)
{
    uint32_t result;

    __asm__ ( "custom\t%1, %0, %2, c%3"
        : "=3Dr" (result) : "n" (op), "r" (a), "n" (b));
    return result;
}

	David

Re: [PATCH 3/6] 44x: Removing dead CONFIG_PPC47x

[Benjamin Herrenschmidt]

On Wed, 2011-11-30 at 06:43 -0500, Josh Boyer wrote:
> 
> That doesn't look right.  The code is there doing something, why is it
> just being removed?  I would think the change would be to use
> CONFIG_PPC_47x?
> 
> Or if the code there isn't needed any longer, the changelog should say
> why.

Ah right, I tripped on this one too when reviewing then figured it out
but I agree, the changelog should be clearer.

If you notice, the original ifdef was in a function that is only ever
used on 44x. There's a separate function that handles 47x. I suppose
this is a leftover of the initial port which somebody forgot to remove.

So the patch is fine, but yes, the changelog could be made clearer.

Cheers,
Ben.

Re: [PATCH 4/6] powerpc/boot: Add extended precision shifts to the boot wrapper.

[Benjamin Herrenschmidt]

On Wed, 2011-11-30 at 06:45 -0500, Josh Boyer wrote:
> On Wed, Nov 30, 2011 at 12:48 AM, Benjamin Herrenschmidt
> <benh@kernel.crashing.org> wrote:
> > On Wed, 2011-11-30 at 16:23 +1100, Tony Breeds wrote:
> >> Code copied from arch/powerpc/kernel/misc_32.S
> >>
> >> Signed-off-by: Tony Breeds <tony@bakeyournoodle.com>
> >> ---
> >>  arch/powerpc/boot/div64.S |   52 +++++++++++++++++++++++++++++++++++++++++++++
> >>  1 files changed, 52 insertions(+), 0 deletions(-)
> >
> > Should we just link with libgcc ? :-)
> 
> Please tell me you're joking.

Only half... I wonder what it would look like. Wouldn't ld only pickup
what we use anyway ?

> However, adding this code and wonderful and all but why do we need to
> add it?  Changelog should say why.

Agreed.

Cheers,
Ben.

Re: [PATCH 4/6] powerpc/boot: Add extended precision shifts to the boot wrapper.

[Scott Wood]

On 11/30/2011 02:21 PM, Benjamin Herrenschmidt wrote:
> On Wed, 2011-11-30 at 06:45 -0500, Josh Boyer wrote:
>> On Wed, Nov 30, 2011 at 12:48 AM, Benjamin Herrenschmidt
>> <benh@kernel.crashing.org> wrote:
>>> On Wed, 2011-11-30 at 16:23 +1100, Tony Breeds wrote:
>>>> Code copied from arch/powerpc/kernel/misc_32.S
>>>>
>>>> Signed-off-by: Tony Breeds <tony@bakeyournoodle.com>
>>>> ---
>>>>  arch/powerpc/boot/div64.S |   52 +++++++++++++++++++++++++++++++++++++++++++++
>>>>  1 files changed, 52 insertions(+), 0 deletions(-)
>>>
>>> Should we just link with libgcc ? :-)
>>
>> Please tell me you're joking.
> 
> Only half... I wonder what it would look like. Wouldn't ld only pickup
> what we use anyway ?

We do it in U-Boot...

Only problem I see is that it would need to be built as soft-float, and
apparently that isn't supported by gcc on 64-bit ppc.  Unfortunately
there's isn't a "no float" mode.

-Scott

Re: [PATCH 4/6] powerpc/boot: Add extended precision shifts to the boot wrapper.

[Tony Breeds]

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On Wed, Nov 30, 2011 at 06:45:37AM -0500, Josh Boyer wrote:

> However, adding this code and wonderful and all but why do we need to
> add it?  Changelog should say why.

Okay changelog updated to:

    powerpc/boot: Add extended precision shifts to the boot wrapper.
    
    The upcoming currituck patches will need to do 64-bit shifts which will
    fail with undefined symbol without this patch.
    
    I looked at linking against libgcc but we can't guarantee that libgcc
    was compiled with soft-float.  Also Using ../lib/div64.S or
    ../kernel/misc_32.S, this will break the build as the .o's need to be
    built with different flags for the bootwrapper vs the kernel.  So for
    now the easiest option is to just copy code from
    arch/powerpc/kernel/misc_32.S  I don't think this code changes too often ;P

Yours Tony

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Re: [PATCH 5/6] powerpc/boot: Add mfdcrx

[Tony Breeds]

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On Wed, Nov 30, 2011 at 02:09:20PM +0100, Segher Boessenkool wrote:
> >+#define mfdcrx(rn) \
> >+	({	\
> >+		unsigned long rval; \
> >+		asm volatile("mfdcrx %0,%1" : "=r"(rval) : "g"(rn)); \
> >+		rval; \
> >+	})
> 
> "g" is never correct on PowerPC, you want "r" here.  You can write
> this as a static inline btw, you only need the #define stuff when
> there is an "i" constraint involved.

Okay I'll change it to "i", mostly I used a #define to match the style
of m[tf]dcr.  To be honnest I didn't know about the issue with "i"
constraints and static inlines.

Yours Tony

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Re: [PATCH 5/6] powerpc/boot: Add mfdcrx

[Tony Breeds]

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On Thu, Dec 01, 2011 at 10:30:27AM +1100, Tony Breeds wrote:

> Okay I'll change it to "i", mostly I used a #define to match the style

Of course I menat "r" here.

Yours Tony

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Re: [PATCH 1/6] 44x/pci: Continue pci setup even if there is no sdr-base in the device-tree

[Tony Breeds]

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On Wed, Nov 30, 2011 at 04:46:13PM +1100, Benjamin Herrenschmidt wrote:

> If you don't expect an sdr-base as part of the normal operations of that
> bridge, don't bring a message that makes me think something is wrong :-)
> 
> Just changing the severity isn't enough. you should just remove the
> message and later on, print/warn/error out if you decide you actually
> need an sdr-base (such as in the backend).

Okay no problem.

Yours Tony

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Re: [PATCH 6/6] 44x/currituck: Add support for the new IBM currituck platform

[Tony Breeds]

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On Wed, Nov 30, 2011 at 05:20:22PM +1100, Benjamin Herrenschmidt wrote:
> On Wed, 2011-11-30 at 16:24 +1100, Tony Breeds wrote:
> > +	plb {
> > +		compatible = "ibm,plb-4xx", "ibm,plb4"; /* Could be PLB6, doesn't matter */
> 
> Then make it plb6 and add it to the probe list. Might have to whack it's
> configuration registers one day etc...

Done.

> > +			 * XXX: 1 TB address space, do we really care past
> > +			 * 4 GB and should we expand cell width?
> > +			 */
> 
> For OPB probably not :-)

Fixed.

> That doesn't seem like a very useful pair of statements or useful debug
> message....

All the DBG cruft is gone.
 
> > +	for(i = 0; i < MAX_RANKS; i++){
> > +		reg = mfdcrx(DDR3_MR0CF + i);
> > +		printf("%s: reg=0x%08x\r\n", __func__, reg);
> 
> All that debug is pretty gross, keep it if you wish but make it a bit
> neater and/or wrap it in DBG

Yeah that was an oversight.
 
> > +		if (reg & 0x01) {
> 
> 	if (!(reg & 1))
> 		continue;
> 
> avoids too much indent

Done.

> > +	dt_fixup_memory(0x0ULL,  ibm_currituck_memsize);
> 
> Ok, I see why the global... I'd still prefer if the detect function just
> returned the value and the caller whacks the global.

Fixed.
 
> > +	while ((devp = find_node_by_devtype(devp, "pci"))) {
> > +		if (getprop(devp, "dma-ranges", &dma_ranges[0], sizeof(dma_ranges)) < 0) {
> 
> Can't you replace &dma_ranges[0] with just dma_ranges ?

Yes, Fixed.

> > +#define SPRN_PIR	0x11E	/* Processor Indentification Register */
> 
> That should go elsewhere along with the other SPR definitions.

There isn't a std. place in the bootwrapper.
> 
> > +void platform_init(void)
> > +{
> > +	/* Cap the zImage to 512MB */
> 
> Any reason ? If yes, please document it a bit more.

XXX

> > +	node = fdt_node_offset_by_prop_value(_dtb_start, -1, "device_type",
> > +	                                     "cpu", sizeof("cpu"));
> > +	if (!node)
> > +		fatal("Cannot find cpu node\n");
> 
> The above will return -a- CPU node... you have several and you don't
> know which one. You should probably iterate accross all of them.

I'm just trying to get the timebase-frequency, this willbe the same on
all CPUs (at least I hope so ;P) so I don't really care which CPU node I
get.
 
> > +	/* FIXME: Check this works */

Grr that comment shouldn't be there.  It does work :)

> > +#define PVR_476CURRITUCK	0x7ff50000
> 
> My understanding is that the currituck was the platform, not the chip,
> and that the chip was called something like 476FPE, am I wrong ?

No you're correct, I was confused about the boundry between 476fpe and
currituck.

> > +	cmplwi	cr0,r3,PVR_476CURRITUCK@h
> > +	beq	head_start_47x
> 
> So at some point, they gave us the magic foo to do with the PVR to
> identify any 476... I'll try to dig that out of my email archives.

Yeah I have that I'll work out the correct way to the the mask and
test.

> > +++ b/arch/powerpc/platforms/44x/ppc47x.c
> 
> Call the file currituck.c

Sure.
 
> > +static void __devinit quirk_ppc_currituck_usb_fixup(struct pci_dev *dev)
> > +{
> > +	pci_write_config_dword(dev, 0xe0, 0x0114231f);
> > +	pci_write_config_dword(dev, 0xe4, 0x00006c40);
> > +}
> 
> Pleae document better what you are doing here and also test
> that you are indeed on the right platform so you don't end up
> whacking bits on USB controllers on other platforms that happen
> to be compiled in the same binary.

Sure, no problem.
 
> Ok, I'll have to fixup that vs. Kyle patches but the good thing is that
> it will make things even simpler.

Thanks.
 
> Now pretty much everything in this platform file is generic I believe.
> We could move it all to ppc44x_simple.c. The only things that are not
> are the USB quirk and the interrupt fixup.
> 
> The USB quirk which should have a compatible test for the platform to
> make sure we don't run it on something else. For such a simple quirk, I
> think it's fine ot have it in ppc44x_simple.c or in drivers/pci/quirk.c
> 
> For the interrupt fixup, we can probably address it entirely in the
> device-tree, though that means exposing a bunch of on-board bridges
> which is only midly annoying.
> 
> Anyways, we can discuss that (or maybe an even better option)
> tomorrow :-) 

Okay I look forward to it :)
 
> Again, you are mixing the SoC with the board here. afaik, currituck is
> the board, not the SoC.

Fixed.

Yours Tony

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Re: [PATCH 6/6] 44x/currituck: Add support for the new IBM currituck platform

[Tony Breeds]

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On Wed, Nov 30, 2011 at 07:23:40AM -0600, Kumar Gala wrote:

> Split the board support patches from the SoC support.

Will do, as I said to Ben I was confused.

> This seems like it should be PVR_476FPE

Yup.  Fixed.

Yours Tony

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Re: [PATCH 6/6] 44x/currituck: Add support for the new IBM currituck platform

[Tony Breeds]

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On Thu, Dec 01, 2011 at 03:05:24PM +1100, Tony Breeds wrote:
> On Wed, Nov 30, 2011 at 05:20:22PM +1100, Benjamin Herrenschmidt wrote:
> > On Wed, 2011-11-30 at 16:24 +1100, Tony Breeds wrote:

<snip>

> > > +void platform_init(void)
> > > +{
> > > +	/* Cap the zImage to 512MB */
> > 
> > Any reason ? If yes, please document it a bit more.
> 
> XXX
 
Where 'XXX' means come back and anser this point /before/ hitting send.

Basically is was lazyness.

Now that I know the memsize I'll allow the zImage to use it all but
512MB should be enought for anywone right?

Yours Tony

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Re: [PATCH 5/6] powerpc/boot: Add mfdcrx

[Segher Boessenkool]

>>> +#define mfdcrx(rn) \
>>> +	({	\
>>> +		unsigned long rval; \
>>> +		asm volatile("mfdcrx %0,%1" : "=r"(rval) : "g"(rn)); \
>>> +		rval; \
>>> +	})
>>
>> "g" is never correct on PowerPC, you want "r" here.  You can write
>> this as a static inline btw, you only need the #define stuff when
>> there is an "i" constraint involved.
>
> I think you can still use static inlines even when a
> constraint is one that requires a compile time constant.

Marking a function inline does not guarantee the compiler will
perform inline substitution on it, which you need here.  I don't
think it's a problem with recent GCC in the context of the Linux
kernel though, if you use __always_inline that is.


Segher