[U-Boot] [PATCH 00/12] ARC: more improvements

[U-Boot] [PATCH 00/12] ARC: more improvements

[Alexey Brodkin]

This series is focused on following items:
 * Move more config options to Kconfig
   - Cache settings
   - Endianess
   - Monitor base

 * Clean-up of board configuration headers

 * Build libgcc in U-Boot for portability

Alexey Brodkin (11):
  arc: remove CPU hard-coded selection from board description in
    include/configs
  arc: add more flavours of ARC700 series CPU
  arc: define and use PTAG AUX regs for MMUv3 only
  arc: select cache settings via menuconfig
  arc: add selection of endianess in Kconfig
  arc: hard-code CONFIG_SYS_GENERIC_BOARD into asm/config.h
  arc: get rid of useless CONFIG_SKIP_LOWLEVEL_INIT
  arc: hard-code CONFIG_ARCH_EARLY_INIT_R in asm/config.h
  arc: move SYS_MONITOR_BASE setup in Konfig
  arc: move CPU flags selection to the main "config.mk"
  arc: build libgcc in U-Boot

Igor Guryanov (1):
  arc: memcmp - fix zero-delay loop utilization

 Kconfig                        |   2 +-
 arch/Kconfig                   |   1 +
 arch/arc/Kconfig               |  71 ++++++++++++-
 arch/arc/config.mk             |  15 ++-
 arch/arc/cpu/arcv1/config.mk   |   7 --
 arch/arc/include/asm/arcregs.h |   6 +-
 arch/arc/include/asm/cache.h   |  19 ++--
 arch/arc/include/asm/config.h  |   2 +
 arch/arc/lib/Makefile          |   2 +
 arch/arc/lib/_millicodethunk.S | 226 +++++++++++++++++++++++++++++++++++++++++
 arch/arc/lib/cache.c           |   7 +-
 arch/arc/lib/libgcc2.c         | 161 +++++++++++++++++++++++++++++
 arch/arc/lib/libgcc2.h         | 132 ++++++++++++++++++++++++
 arch/arc/lib/memcmp.S          |   2 +
 board/synopsys/Kconfig         |  10 --
 board/synopsys/MAINTAINERS     |   1 -
 configs/arcangel4-be_defconfig |   4 +-
 configs/arcangel4_defconfig    |   1 +
 configs/axs101_defconfig       |   5 +-
 configs/tb100_defconfig        |   4 +-
 include/configs/arcangel4-be.h |  91 -----------------
 include/configs/arcangel4.h    |  12 ---
 include/configs/axs101.h       |  15 ---
 include/configs/tb100.h        |  10 --
 24 files changed, 639 insertions(+), 167 deletions(-)
 delete mode 100644 arch/arc/cpu/arcv1/config.mk
 create mode 100644 arch/arc/lib/_millicodethunk.S
 create mode 100644 arch/arc/lib/libgcc2.c
 create mode 100644 arch/arc/lib/libgcc2.h
 delete mode 100644 include/configs/arcangel4-be.h

-- 
2.1.0

[U-Boot] [PATCH 01/12] arc: memcmp - fix zero-delay loop utilization

[Alexey Brodkin]

From: Igor Guryanov <guryanov@synopsys.com>

It's prohibited to put branch instruction in the very end of zero-delay
loop. On execution this causes "Illegal instruction" exception.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Signed-off-by: Igor Guryanov <guryanov@synopsys.com>
---
 arch/arc/lib/memcmp.S | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arc/lib/memcmp.S b/arch/arc/lib/memcmp.S
index fa5aac5..87bccab 100644
--- a/arch/arc/lib/memcmp.S
+++ b/arch/arc/lib/memcmp.S
@@ -29,6 +29,7 @@ memcmp:
 	ld.a	%r4, [%r0, 8]
 	ld.a	%r5, [%r1, 8]
 	brne	WORD2, %r12, .Lodd
+	nop
 .Loop_end:
 	asl_s	SHIFT, SHIFT, 3
 	bhs_s	.Last_cmp
@@ -105,6 +106,7 @@ memcmp:
 	ldb.a	%r4, [%r0, 2]
 	ldb.a	%r5, [%r1, 2]
 	brne	%r3, %r12, .Lbyte_odd
+	nop
 .Lbyte_end:
 	bcc	.Lbyte_even
 	brne	%r4, %r5, .Lbyte_even
-- 
2.1.0

[U-Boot] [PATCH 02/12] arc: remove CPU hard-coded selection from board description in include/configs

[Alexey Brodkin]

With switch to Kconfig we only need very board-specific descriptions in
include/configs.

CPU selection is performed with either defconfig or manually via
menuconfig.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
---
 include/configs/arcangel4-be.h | 1 -
 include/configs/arcangel4.h    | 1 -
 include/configs/axs101.h       | 1 -
 include/configs/tb100.h        | 1 -
 4 files changed, 4 deletions(-)

diff --git a/include/configs/arcangel4-be.h b/include/configs/arcangel4-be.h
index 76163ab..2ca209e 100644
--- a/include/configs/arcangel4-be.h
+++ b/include/configs/arcangel4-be.h
@@ -11,7 +11,6 @@
  *  CPU configuration
  */
 #define CONFIG_SYS_BIG_ENDIAN
-#define CONFIG_ARC700
 #define CONFIG_ARC_MMU_VER		3
 #define CONFIG_SYS_CACHELINE_SIZE	64
 #define CONFIG_SYS_TIMER_RATE		CONFIG_SYS_CLK_FREQ
diff --git a/include/configs/arcangel4.h b/include/configs/arcangel4.h
index 81934a4..2afb63d 100644
--- a/include/configs/arcangel4.h
+++ b/include/configs/arcangel4.h
@@ -10,7 +10,6 @@
 /*
  *  CPU configuration
  */
-#define CONFIG_ARC700
 #define CONFIG_ARC_MMU_VER		3
 #define CONFIG_SYS_CACHELINE_SIZE	64
 #define CONFIG_SYS_TIMER_RATE		CONFIG_SYS_CLK_FREQ
diff --git a/include/configs/axs101.h b/include/configs/axs101.h
index c61ddd6..a8a9cb3 100644
--- a/include/configs/axs101.h
+++ b/include/configs/axs101.h
@@ -10,7 +10,6 @@
 /*
  *  CPU configuration
  */
-#define CONFIG_ARC700
 #define CONFIG_ARC_MMU_VER		3
 #define CONFIG_SYS_CACHELINE_SIZE	32
 #define CONFIG_SYS_TIMER_RATE		CONFIG_SYS_CLK_FREQ
diff --git a/include/configs/tb100.h b/include/configs/tb100.h
index e9218f7..a598343 100644
--- a/include/configs/tb100.h
+++ b/include/configs/tb100.h
@@ -12,7 +12,6 @@
 /*
  *  CPU configuration
  */
-#define CONFIG_ARC700
 #define CONFIG_ARC_MMU_VER		3
 #define CONFIG_SYS_CACHELINE_SIZE	32
 #define CONFIG_SYS_TIMER_RATE		CONFIG_SYS_CLK_FREQ
-- 
2.1.0

[U-Boot] [PATCH 03/12] arc: add more flavours of ARC700 series CPU

[Alexey Brodkin]

Now we may select a particular version of ARC700:
 * ARC750D or
 * ARC770D

It allows more flexible (or more fine tuned) configuration of U-Boot.
Before that change we relied on minimal configuration but now we may
use specific features of each CPU.

Moreover allows us to escape manual selection of options that
exist in both CPUs but may have say different version like MMUv2 in
ARC750D vs MMUv3 in ARC770D.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
---
 arch/arc/Kconfig               | 40 ++++++++++++++++++++++++++++++++++++++++
 arch/arc/config.mk             |  4 ++++
 arch/arc/include/asm/arcregs.h |  2 ++
 arch/arc/include/asm/cache.h   |  6 ++++++
 include/configs/arcangel4-be.h |  1 -
 include/configs/arcangel4.h    |  1 -
 include/configs/axs101.h       |  1 -
 include/configs/tb100.h        |  1 -
 8 files changed, 52 insertions(+), 4 deletions(-)

diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index c6b1efe..f7d2964 100644
--- a/arch/arc/Kconfig
+++ b/arch/arc/Kconfig
@@ -8,6 +8,46 @@ config SYS_CPU
 	default "arcv1"
 
 choice
+	prompt "CPU selection"
+	default CPU_ARC770D
+
+config CPU_ARC750D
+	bool "ARC 750D"
+	select ARC_MMU_V2
+	help
+	  Choose this option to build an U-Boot for ARC750D CPU.
+
+config CPU_ARC770D
+	bool "ARC 770D"
+	select ARC_MMU_V3
+	help
+	  Choose this option to build an U-Boot for ARC770D CPU.
+
+endchoice
+
+choice
+	prompt "MMU Version"
+	default ARC_MMU_V3 if CPU_ARC770D
+	default ARC_MMU_V2 if CPU_ARC750D
+
+config ARC_MMU_V2
+	bool "MMU v2"
+	depends on CPU_ARC750D
+	help
+	  Fixed the deficiency of v1 - possible thrashing in memcpy sceanrio
+	  when 2 D-TLB and 1 I-TLB entries index into same 2way set.
+
+config ARC_MMU_V3
+	bool "MMU v3"
+	depends on CPU_ARC770D
+	help
+	  Introduced with ARC700 4.10: New Features
+	  Variable Page size (1k-16k), var JTLB size 128 x (2 or 4)
+	  Shared Address Spaces (SASID)
+
+endchoice
+
+choice
 	prompt "Target select"
 
 config TARGET_TB100
diff --git a/arch/arc/config.mk b/arch/arc/config.mk
index 5321987..dd180ef 100644
--- a/arch/arc/config.mk
+++ b/arch/arc/config.mk
@@ -25,6 +25,10 @@ ifdef CONFIG_ARC_MMU_VER
 CONFIG_MMU = 1
 endif
 
+ifdef CONFIG_CPU_ARC770D
+PLATFORM_CPPFLAGS += -mlock -mswape
+endif
+
 PLATFORM_CPPFLAGS += -ffixed-r25 -D__ARC__ -gdwarf-2
 
 # Needed for relocation
diff --git a/arch/arc/include/asm/arcregs.h b/arch/arc/include/asm/arcregs.h
index 8ace87f..31627e6 100644
--- a/arch/arc/include/asm/arcregs.h
+++ b/arch/arc/include/asm/arcregs.h
@@ -7,6 +7,8 @@
 #ifndef _ASM_ARC_ARCREGS_H
 #define _ASM_ARC_ARCREGS_H
 
+#include <asm/cache.h>
+
 /*
  * ARC architecture has additional address space - auxiliary registers.
  * These registers are mostly used for configuration purposes.
diff --git a/arch/arc/include/asm/cache.h b/arch/arc/include/asm/cache.h
index 16e7568..368d1f0 100644
--- a/arch/arc/include/asm/cache.h
+++ b/arch/arc/include/asm/cache.h
@@ -20,4 +20,10 @@
 #define ARCH_DMA_MINALIGN	128
 #endif
 
+#if defined(CONFIG_ARC_MMU_V2)
+#define CONFIG_ARC_MMU_VER 2
+#elif defined(CONFIG_ARC_MMU_V3)
+#define CONFIG_ARC_MMU_VER 3
+#endif
+
 #endif /* __ASM_ARC_CACHE_H */
diff --git a/include/configs/arcangel4-be.h b/include/configs/arcangel4-be.h
index 2ca209e..a43590b 100644
--- a/include/configs/arcangel4-be.h
+++ b/include/configs/arcangel4-be.h
@@ -11,7 +11,6 @@
  *  CPU configuration
  */
 #define CONFIG_SYS_BIG_ENDIAN
-#define CONFIG_ARC_MMU_VER		3
 #define CONFIG_SYS_CACHELINE_SIZE	64
 #define CONFIG_SYS_TIMER_RATE		CONFIG_SYS_CLK_FREQ
 
diff --git a/include/configs/arcangel4.h b/include/configs/arcangel4.h
index 2afb63d..565f70e 100644
--- a/include/configs/arcangel4.h
+++ b/include/configs/arcangel4.h
@@ -10,7 +10,6 @@
 /*
  *  CPU configuration
  */
-#define CONFIG_ARC_MMU_VER		3
 #define CONFIG_SYS_CACHELINE_SIZE	64
 #define CONFIG_SYS_TIMER_RATE		CONFIG_SYS_CLK_FREQ
 
diff --git a/include/configs/axs101.h b/include/configs/axs101.h
index a8a9cb3..b94687c 100644
--- a/include/configs/axs101.h
+++ b/include/configs/axs101.h
@@ -10,7 +10,6 @@
 /*
  *  CPU configuration
  */
-#define CONFIG_ARC_MMU_VER		3
 #define CONFIG_SYS_CACHELINE_SIZE	32
 #define CONFIG_SYS_TIMER_RATE		CONFIG_SYS_CLK_FREQ
 
diff --git a/include/configs/tb100.h b/include/configs/tb100.h
index a598343..f353950 100644
--- a/include/configs/tb100.h
+++ b/include/configs/tb100.h
@@ -12,7 +12,6 @@
 /*
  *  CPU configuration
  */
-#define CONFIG_ARC_MMU_VER		3
 #define CONFIG_SYS_CACHELINE_SIZE	32
 #define CONFIG_SYS_TIMER_RATE		CONFIG_SYS_CLK_FREQ
 
-- 
2.1.0

[U-Boot] [PATCH 04/12] arc: define and use PTAG AUX regs for MMUv3 only

[Alexey Brodkin]

DC_PTAG and IC_PTAG registers only exist in MMUv3.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
---
 arch/arc/include/asm/arcregs.h | 4 ++--
 arch/arc/lib/cache.c           | 6 +++---
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/arch/arc/include/asm/arcregs.h b/arch/arc/include/asm/arcregs.h
index 31627e6..6a36a81 100644
--- a/arch/arc/include/asm/arcregs.h
+++ b/arch/arc/include/asm/arcregs.h
@@ -23,7 +23,7 @@
 #define ARC_AUX_IC_IVIC		0x10
 #define ARC_AUX_IC_CTRL		0x11
 #define ARC_AUX_IC_IVIL		0x19
-#if (CONFIG_ARC_MMU_VER > 2)
+#if (CONFIG_ARC_MMU_VER == 3)
 #define ARC_AUX_IC_PTAG		0x1E
 #endif
 #define ARC_BCR_IC_BUILD	0x77
@@ -42,7 +42,7 @@
 #define ARC_AUX_DC_IVDL		0x4A
 #define ARC_AUX_DC_FLSH		0x4B
 #define ARC_AUX_DC_FLDL		0x4C
-#if (CONFIG_ARC_MMU_VER > 2)
+#if (CONFIG_ARC_MMU_VER == 3)
 #define ARC_AUX_DC_PTAG		0x5C
 #endif
 #define ARC_BCR_DC_BUILD	0x72
diff --git a/arch/arc/lib/cache.c b/arch/arc/lib/cache.c
index fa19a13..fa2a1e7 100644
--- a/arch/arc/lib/cache.c
+++ b/arch/arc/lib/cache.c
@@ -101,7 +101,7 @@ void flush_dcache_all(void)
 #ifndef CONFIG_SYS_DCACHE_OFF
 static void dcache_flush_line(unsigned addr)
 {
-#if (CONFIG_ARC_MMU_VER > 2)
+#if (CONFIG_ARC_MMU_VER == 3)
 	write_aux_reg(ARC_AUX_DC_PTAG, addr);
 #endif
 	write_aux_reg(ARC_AUX_DC_FLDL, addr);
@@ -115,7 +115,7 @@ static void dcache_flush_line(unsigned addr)
 	 * Invalidate I$ for addresses range just flushed from D$.
 	 * If we try to execute data flushed above it will be valid/correct
 	 */
-#if (CONFIG_ARC_MMU_VER > 2)
+#if (CONFIG_ARC_MMU_VER == 3)
 	write_aux_reg(ARC_AUX_IC_PTAG, addr);
 #endif
 	write_aux_reg(ARC_AUX_IC_IVIL, addr);
@@ -145,7 +145,7 @@ void invalidate_dcache_range(unsigned long start, unsigned long end)
 	end = end & (~(CONFIG_SYS_CACHELINE_SIZE - 1));
 
 	for (addr = start; addr <= end; addr += CONFIG_SYS_CACHELINE_SIZE) {
-#if (CONFIG_ARC_MMU_VER > 2)
+#if (CONFIG_ARC_MMU_VER == 3)
 		write_aux_reg(ARC_AUX_DC_PTAG, addr);
 #endif
 		write_aux_reg(ARC_AUX_DC_IVDL, addr);
-- 
2.1.0

[U-Boot] [PATCH 05/12] arc: select cache settings via menuconfig

[Alexey Brodkin]

This change allows to keep board description clean and minimalistic.
This is especially helpful if one board may house different CPUs with
different features.

It is applicable to both FPGA-based boards or those that have CPUs
mounted on interchnagable daughter-boards.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
---
 arch/arc/Kconfig               | 19 +++++++++++++++++++
 arch/arc/include/asm/cache.h   | 13 +++++--------
 arch/arc/lib/cache.c           |  1 +
 configs/axs101_defconfig       |  4 +++-
 configs/tb100_defconfig        |  3 ++-
 include/configs/arcangel4-be.h |  1 -
 include/configs/arcangel4.h    |  1 -
 include/configs/axs101.h       |  4 ----
 include/configs/tb100.h        |  1 -
 9 files changed, 30 insertions(+), 17 deletions(-)

diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index f7d2964..397b179 100644
--- a/arch/arc/Kconfig
+++ b/arch/arc/Kconfig
@@ -47,6 +47,25 @@ config ARC_MMU_V3
 
 endchoice
 
+config SYS_ICACHE_OFF
+	bool "Do not use Instruction Cache"
+	default n
+
+config SYS_DCACHE_OFF
+	bool "Do not use Data Cache"
+	default n
+
+config ARC_CACHE_LINE_SHIFT
+	int "Cache Line Length (as power of 2)"
+	range 5 7
+	default "6"
+	depends on !SYS_DCACHE_OFF || !SYS_DCACHE_OFF
+	help
+	  Starting with ARC700 4.9, Cache line length is configurable,
+	  This option specifies "N", with Line-len = 2 power N
+	  So line lengths of 32, 64, 128 are specified by 5,6,7, respectively
+	  Linux only supports same line lengths for I and D caches.
+
 choice
 	prompt "Target select"
 
diff --git a/arch/arc/include/asm/cache.h b/arch/arc/include/asm/cache.h
index 368d1f0..2725961 100644
--- a/arch/arc/include/asm/cache.h
+++ b/arch/arc/include/asm/cache.h
@@ -9,15 +9,12 @@
 
 #include <config.h>
 
-/*
- * The current upper bound for ARC L1 data cache line sizes is 128 bytes.
- * We use that value for aligning DMA buffers unless the board config has
- * specified an alternate cache line size.
- */
-#ifdef CONFIG_SYS_CACHELINE_SIZE
-#define ARCH_DMA_MINALIGN	CONFIG_SYS_CACHELINE_SIZE
+#ifdef CONFIG_ARC_CACHE_LINE_SHIFT
+#define CONFIG_SYS_CACHELINE_SIZE	(1 << CONFIG_ARC_CACHE_LINE_SHIFT)
+#define ARCH_DMA_MINALIGN		CONFIG_SYS_CACHELINE_SIZE
 #else
-#define ARCH_DMA_MINALIGN	128
+/* Satisfy users of ARCH_DMA_MINALIGN */
+#define ARCH_DMA_MINALIGN		128
 #endif
 
 #if defined(CONFIG_ARC_MMU_V2)
diff --git a/arch/arc/lib/cache.c b/arch/arc/lib/cache.c
index fa2a1e7..a227723 100644
--- a/arch/arc/lib/cache.c
+++ b/arch/arc/lib/cache.c
@@ -6,6 +6,7 @@
 
 #include <config.h>
 #include <asm/arcregs.h>
+#include <asm/cache.h>
 
 /* Bit values in IC_CTRL */
 #define IC_CTRL_CACHE_DISABLE	(1 << 0)
diff --git a/configs/axs101_defconfig b/configs/axs101_defconfig
index 5c0ca11..d165e41 100644
--- a/configs/axs101_defconfig
+++ b/configs/axs101_defconfig
@@ -1,3 +1,5 @@
 CONFIG_ARC=y
 CONFIG_TARGET_AXS101=y
-CONFIG_SYS_CLK_FREQ=750000000
\ No newline at end of file
+CONFIG_SYS_CLK_FREQ=750000000
+CONFIG_ARC_CACHE_LINE_SHIFT=5
+CONFIG_SYS_DCACHE_OFF=y
\ No newline at end of file
diff --git a/configs/tb100_defconfig b/configs/tb100_defconfig
index d2de03b..e17a495 100644
--- a/configs/tb100_defconfig
+++ b/configs/tb100_defconfig
@@ -1,3 +1,4 @@
 CONFIG_ARC=y
 CONFIG_TARGET_TB100=y
-CONFIG_SYS_CLK_FREQ=500000000
\ No newline@end of file
+CONFIG_SYS_CLK_FREQ=500000000
+CONFIG_ARC_CACHE_LINE_SHIFT=5
diff --git a/include/configs/arcangel4-be.h b/include/configs/arcangel4-be.h
index a43590b..b0bc8bc 100644
--- a/include/configs/arcangel4-be.h
+++ b/include/configs/arcangel4-be.h
@@ -11,7 +11,6 @@
  *  CPU configuration
  */
 #define CONFIG_SYS_BIG_ENDIAN
-#define CONFIG_SYS_CACHELINE_SIZE	64
 #define CONFIG_SYS_TIMER_RATE		CONFIG_SYS_CLK_FREQ
 
 /*
diff --git a/include/configs/arcangel4.h b/include/configs/arcangel4.h
index 565f70e..3268c56 100644
--- a/include/configs/arcangel4.h
+++ b/include/configs/arcangel4.h
@@ -10,7 +10,6 @@
 /*
  *  CPU configuration
  */
-#define CONFIG_SYS_CACHELINE_SIZE	64
 #define CONFIG_SYS_TIMER_RATE		CONFIG_SYS_CLK_FREQ
 
 /*
diff --git a/include/configs/axs101.h b/include/configs/axs101.h
index b94687c..ff3fad3 100644
--- a/include/configs/axs101.h
+++ b/include/configs/axs101.h
@@ -10,12 +10,8 @@
 /*
  *  CPU configuration
  */
-#define CONFIG_SYS_CACHELINE_SIZE	32
 #define CONFIG_SYS_TIMER_RATE		CONFIG_SYS_CLK_FREQ
 
-/* NAND controller DMA doesn't work correctly with D$ enabled */
-#define CONFIG_SYS_DCACHE_OFF
-
 /*
  * Board configuration
  */
diff --git a/include/configs/tb100.h b/include/configs/tb100.h
index f353950..32675c4 100644
--- a/include/configs/tb100.h
+++ b/include/configs/tb100.h
@@ -12,7 +12,6 @@
 /*
  *  CPU configuration
  */
-#define CONFIG_SYS_CACHELINE_SIZE	32
 #define CONFIG_SYS_TIMER_RATE		CONFIG_SYS_CLK_FREQ
 
 /*
-- 
2.1.0

[U-Boot] [PATCH 06/12] arc: add selection of endianess in Kconfig

[Alexey Brodkin]

This change allows to keep board description clean and minimalistic.
This is especially helpful if one board may house different CPUs with
different features.

It is applicable to both FPGA-based boards or those that have CPUs
mounted on interchnagable daughter-boards.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
---
 arch/arc/Kconfig               |  9 +++--
 arch/arc/config.mk             |  4 +-
 board/synopsys/Kconfig         | 10 -----
 board/synopsys/MAINTAINERS     |  1 -
 configs/arcangel4-be_defconfig |  3 +-
 include/configs/arcangel4-be.h | 88 ------------------------------------------
 6 files changed, 11 insertions(+), 104 deletions(-)
 delete mode 100644 include/configs/arcangel4-be.h

diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index 397b179..04fc7b6 100644
--- a/arch/arc/Kconfig
+++ b/arch/arc/Kconfig
@@ -47,6 +47,12 @@ config ARC_MMU_V3
 
 endchoice
 
+config CPU_BIG_ENDIAN
+	bool "Enable Big Endian Mode"
+	default n
+	help
+	  Build kernel for Big Endian Mode of ARC CPU
+
 config SYS_ICACHE_OFF
 	bool "Do not use Instruction Cache"
 	default n
@@ -75,9 +81,6 @@ config TARGET_TB100
 config TARGET_ARCANGEL4
 	bool "Support arcangel4"
 
-config TARGET_ARCANGEL4_BE
-	bool "Support arcangel4-be"
-
 config TARGET_AXS101
 	bool "Support axs101"
 
diff --git a/arch/arc/config.mk b/arch/arc/config.mk
index dd180ef..4f2d31f 100644
--- a/arch/arc/config.mk
+++ b/arch/arc/config.mk
@@ -4,8 +4,10 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-ifndef CONFIG_SYS_BIG_ENDIAN
+ifndef CONFIG_CPU_BIG_ENDIAN
 CONFIG_SYS_LITTLE_ENDIAN = 1
+else
+CONFIG_SYS_BIG_ENDIAN = 1
 endif
 
 ifdef CONFIG_SYS_LITTLE_ENDIAN
diff --git a/board/synopsys/Kconfig b/board/synopsys/Kconfig
index f614f88..8ab48cd 100644
--- a/board/synopsys/Kconfig
+++ b/board/synopsys/Kconfig
@@ -7,13 +7,3 @@ config SYS_CONFIG_NAME
 	default "arcangel4"
 
 endif
-
-if TARGET_ARCANGEL4_BE
-
-config SYS_VENDOR
-	default "synopsys"
-
-config SYS_CONFIG_NAME
-	default "arcangel4-be"
-
-endif
diff --git a/board/synopsys/MAINTAINERS b/board/synopsys/MAINTAINERS
index 720edd8..43114ce 100644
--- a/board/synopsys/MAINTAINERS
+++ b/board/synopsys/MAINTAINERS
@@ -3,5 +3,4 @@ M:	Alexey Brodkin <abrodkin@synopsys.com>
 S:	Maintained
 F:	include/configs/arcangel4.h
 F:	configs/arcangel4_defconfig
-F:	include/configs/arcangel4-be.h
 F:	configs/arcangel4-be_defconfig
diff --git a/configs/arcangel4-be_defconfig b/configs/arcangel4-be_defconfig
index 0c3ab4e..5d2e126 100644
--- a/configs/arcangel4-be_defconfig
+++ b/configs/arcangel4-be_defconfig
@@ -1,3 +1,4 @@
 CONFIG_ARC=y
-CONFIG_TARGET_ARCANGEL4_BE=y
+CONFIG_TARGET_ARCANGEL4=y
 CONFIG_SYS_CLK_FREQ=70000000
+CONFIG_CPU_BIG_ENDIAN=y
diff --git a/include/configs/arcangel4-be.h b/include/configs/arcangel4-be.h
deleted file mode 100644
index b0bc8bc..0000000
--- a/include/configs/arcangel4-be.h
+++ /dev/null
@@ -1,88 +0,0 @@
-/*
- * Copyright (C) 2013-2014 Synopsys, Inc. All rights reserved.
- *
- * SPDX-License-Identifier:	GPL-2.0+
- */
-
-#ifndef _CONFIG_ARCANGEL4_H_
-#define _CONFIG_ARCANGEL4_H_
-
-/*
- *  CPU configuration
- */
-#define CONFIG_SYS_BIG_ENDIAN
-#define CONFIG_SYS_TIMER_RATE		CONFIG_SYS_CLK_FREQ
-
-/*
- * Board configuration
- */
-#define CONFIG_SYS_GENERIC_BOARD
-#define CONFIG_SKIP_LOWLEVEL_INIT	/* U-Boot is in RAM already */
-
-#define CONFIG_ARCH_EARLY_INIT_R
-
-/*
- * Memory configuration
- */
-#define CONFIG_SYS_TEXT_BASE		0x81000000
-#define CONFIG_SYS_MONITOR_BASE		CONFIG_SYS_TEXT_BASE
-
-#define CONFIG_SYS_DDR_SDRAM_BASE	0x80000000
-#define CONFIG_SYS_SDRAM_BASE		CONFIG_SYS_DDR_SDRAM_BASE
-#define CONFIG_SYS_SDRAM_SIZE		0x10000000	/* 256 Mb */
-
-#define CONFIG_SYS_INIT_SP_ADDR		\
-	(CONFIG_SYS_SDRAM_BASE + 0x1000 - GENERATED_GBL_DATA_SIZE)
-
-#define CONFIG_SYS_MALLOC_LEN		0x200000	/* 2 MB */
-#define CONFIG_SYS_BOOTM_LEN		0x2000000	/* 32 MB */
-#define CONFIG_SYS_LOAD_ADDR		0x82000000
-
-#define CONFIG_SYS_NO_FLASH
-
-/*
- * UART configuration
- *
- */
-#define CONFIG_ARC_SERIAL
-#define CONFIG_ARC_UART_BASE		0xC0FC1000
-#define CONFIG_BAUDRATE			115200
-
-/*
- * Command line configuration
- */
-#include <config_cmd_default.h>
-
-#define CONFIG_CMD_ELF
-
-#define CONFIG_OF_LIBFDT
-
-#define CONFIG_AUTO_COMPLETE
-#define CONFIG_SYS_MAXARGS		16
-
-/*
- * Environment settings
- */
-#define CONFIG_ENV_IS_NOWHERE
-#define CONFIG_ENV_SIZE			0x00200		/* 512 bytes */
-#define CONFIG_ENV_OFFSET		0
-
-/*
- * Environment configuration
- */
-#define CONFIG_BOOTDELAY		3
-#define CONFIG_BOOTFILE			"uImage"
-#define CONFIG_BOOTARGS			"console=ttyARC0,115200n8"
-#define CONFIG_LOADADDR			CONFIG_SYS_LOAD_ADDR
-
-/*
- * Console configuration
- */
-#define CONFIG_SYS_LONGHELP
-#define CONFIG_SYS_PROMPT		"arcangel4# "
-#define CONFIG_SYS_CBSIZE		256
-#define CONFIG_SYS_BARGSIZE		CONFIG_SYS_CBSIZE
-#define CONFIG_SYS_PBSIZE		(CONFIG_SYS_CBSIZE + \
-						sizeof(CONFIG_SYS_PROMPT) + 16)
-
-#endif /* _CONFIG_ARCANGEL4_H_ */
-- 
2.1.0

[U-Boot] [PATCH 07/12] arc: hard-code CONFIG_SYS_GENERIC_BOARD into asm/config.h

[Alexey Brodkin]

There're no other options for ARC except "generic board" so ther's no
point to define CONFIG_SYS_GENERIC_BOARD per board.

We now have it set fo all ARC boards.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
---
 arch/arc/include/asm/config.h | 1 +
 include/configs/arcangel4.h   | 1 -
 include/configs/axs101.h      | 1 -
 include/configs/tb100.h       | 1 -
 4 files changed, 1 insertion(+), 3 deletions(-)

diff --git a/arch/arc/include/asm/config.h b/arch/arc/include/asm/config.h
index e5be078..c1e9b44 100644
--- a/arch/arc/include/asm/config.h
+++ b/arch/arc/include/asm/config.h
@@ -7,6 +7,7 @@
 #ifndef __ASM_ARC_CONFIG_H_
 #define __ASM_ARC_CONFIG_H_
 
+#define CONFIG_SYS_GENERIC_BOARD
 #define CONFIG_SYS_GENERIC_GLOBAL_DATA
 #define CONFIG_SYS_BOOT_RAMDISK_HIGH
 
diff --git a/include/configs/arcangel4.h b/include/configs/arcangel4.h
index 3268c56..60f3077 100644
--- a/include/configs/arcangel4.h
+++ b/include/configs/arcangel4.h
@@ -15,7 +15,6 @@
 /*
  * Board configuration
  */
-#define CONFIG_SYS_GENERIC_BOARD
 #define CONFIG_SKIP_LOWLEVEL_INIT	/* U-Boot is in RAM already */
 
 #define CONFIG_ARCH_EARLY_INIT_R
diff --git a/include/configs/axs101.h b/include/configs/axs101.h
index ff3fad3..2340d99 100644
--- a/include/configs/axs101.h
+++ b/include/configs/axs101.h
@@ -15,7 +15,6 @@
 /*
  * Board configuration
  */
-#define CONFIG_SYS_GENERIC_BOARD
 #define CONFIG_SKIP_LOWLEVEL_INIT	/* U-Boot is in RAM already */
 
 #define CONFIG_ARCH_EARLY_INIT_R
diff --git a/include/configs/tb100.h b/include/configs/tb100.h
index 32675c4..c6878fc 100644
--- a/include/configs/tb100.h
+++ b/include/configs/tb100.h
@@ -17,7 +17,6 @@
 /*
  * Board configuration
  */
-#define CONFIG_SYS_GENERIC_BOARD
 #define CONFIG_ARCH_EARLY_INIT_R
 
 /*
-- 
2.1.0

[U-Boot] [PATCH 08/12] arc: get rid of useless CONFIG_SKIP_LOWLEVEL_INIT

[Alexey Brodkin]

Currently there's nothing related to really low-level init on ARC so
CONFIG_SKIP_LOWLEVEL_INIT definition makes no sense.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
---
 include/configs/arcangel4.h | 2 --
 include/configs/axs101.h    | 2 --
 2 files changed, 4 deletions(-)

diff --git a/include/configs/arcangel4.h b/include/configs/arcangel4.h
index 60f3077..003a45d 100644
--- a/include/configs/arcangel4.h
+++ b/include/configs/arcangel4.h
@@ -15,8 +15,6 @@
 /*
  * Board configuration
  */
-#define CONFIG_SKIP_LOWLEVEL_INIT	/* U-Boot is in RAM already */
-
 #define CONFIG_ARCH_EARLY_INIT_R
 
 /*
diff --git a/include/configs/axs101.h b/include/configs/axs101.h
index 2340d99..4064ed2 100644
--- a/include/configs/axs101.h
+++ b/include/configs/axs101.h
@@ -15,8 +15,6 @@
 /*
  * Board configuration
  */
-#define CONFIG_SKIP_LOWLEVEL_INIT	/* U-Boot is in RAM already */
-
 #define CONFIG_ARCH_EARLY_INIT_R
 
 #define ARC_FPGA_PERIPHERAL_BASE	0xE0000000
-- 
2.1.0

[U-Boot] [PATCH 09/12] arc: hard-code CONFIG_ARCH_EARLY_INIT_R in asm/config.h

[Alexey Brodkin]

Common arch_early_init_r() is used in "arc/lib/cpu.c" for all ARC boards
so there's no sense in separate per-board definitions.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
---
 arch/arc/include/asm/config.h | 1 +
 include/configs/arcangel4.h   | 5 -----
 include/configs/axs101.h      | 5 -----
 include/configs/tb100.h       | 5 -----
 4 files changed, 1 insertion(+), 15 deletions(-)

diff --git a/arch/arc/include/asm/config.h b/arch/arc/include/asm/config.h
index c1e9b44..b4e9099 100644
--- a/arch/arc/include/asm/config.h
+++ b/arch/arc/include/asm/config.h
@@ -10,6 +10,7 @@
 #define CONFIG_SYS_GENERIC_BOARD
 #define CONFIG_SYS_GENERIC_GLOBAL_DATA
 #define CONFIG_SYS_BOOT_RAMDISK_HIGH
+#define CONFIG_ARCH_EARLY_INIT_R
 
 #define CONFIG_LMB
 
diff --git a/include/configs/arcangel4.h b/include/configs/arcangel4.h
index 003a45d..80d6438 100644
--- a/include/configs/arcangel4.h
+++ b/include/configs/arcangel4.h
@@ -13,11 +13,6 @@
 #define CONFIG_SYS_TIMER_RATE		CONFIG_SYS_CLK_FREQ
 
 /*
- * Board configuration
- */
-#define CONFIG_ARCH_EARLY_INIT_R
-
-/*
  * Memory configuration
  */
 #define CONFIG_SYS_TEXT_BASE		0x81000000
diff --git a/include/configs/axs101.h b/include/configs/axs101.h
index 4064ed2..e9a3231 100644
--- a/include/configs/axs101.h
+++ b/include/configs/axs101.h
@@ -12,11 +12,6 @@
  */
 #define CONFIG_SYS_TIMER_RATE		CONFIG_SYS_CLK_FREQ
 
-/*
- * Board configuration
- */
-#define CONFIG_ARCH_EARLY_INIT_R
-
 #define ARC_FPGA_PERIPHERAL_BASE	0xE0000000
 #define ARC_APB_PERIPHERAL_BASE		0xF0000000
 #define ARC_DWMMC_BASE			(ARC_FPGA_PERIPHERAL_BASE + 0x15000)
diff --git a/include/configs/tb100.h b/include/configs/tb100.h
index c6878fc..54eca6f 100644
--- a/include/configs/tb100.h
+++ b/include/configs/tb100.h
@@ -15,11 +15,6 @@
 #define CONFIG_SYS_TIMER_RATE		CONFIG_SYS_CLK_FREQ
 
 /*
- * Board configuration
- */
-#define CONFIG_ARCH_EARLY_INIT_R
-
-/*
  * Memory configuration
  */
 #define CONFIG_SYS_TEXT_BASE		0x84000000
-- 
2.1.0

[U-Boot] [PATCH 10/12] arc: move SYS_MONITOR_BASE setup in Konfig

[Alexey Brodkin]

Following SPARK ARC now has SYS_MONITOR_BASE setup via Kconfig.
This makes "include/configs/*.h" cleaner and more flexible.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
---
 Kconfig                        | 2 +-
 configs/arcangel4-be_defconfig | 1 +
 configs/arcangel4_defconfig    | 1 +
 configs/axs101_defconfig       | 3 ++-
 configs/tb100_defconfig        | 1 +
 include/configs/arcangel4.h    | 1 -
 include/configs/axs101.h       | 1 -
 include/configs/tb100.h        | 1 -
 8 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/Kconfig b/Kconfig
index 4157da3..145421a 100644
--- a/Kconfig
+++ b/Kconfig
@@ -138,7 +138,7 @@ config SYS_EXTRA_OPTIONS
 	  new boards should not use this option.
 
 config SYS_TEXT_BASE
-	depends on SPARC
+	depends on SPARC || ARC
 	hex "Text Base"
 	help
 	  TODO: Move CONFIG_SYS_TEXT_BASE for all the architecture
diff --git a/configs/arcangel4-be_defconfig b/configs/arcangel4-be_defconfig
index 5d2e126..979f26e 100644
--- a/configs/arcangel4-be_defconfig
+++ b/configs/arcangel4-be_defconfig
@@ -2,3 +2,4 @@ CONFIG_ARC=y
 CONFIG_TARGET_ARCANGEL4=y
 CONFIG_SYS_CLK_FREQ=70000000
 CONFIG_CPU_BIG_ENDIAN=y
+CONFIG_SYS_TEXT_BASE=0x81000000
diff --git a/configs/arcangel4_defconfig b/configs/arcangel4_defconfig
index a63ef21..797595f 100644
--- a/configs/arcangel4_defconfig
+++ b/configs/arcangel4_defconfig
@@ -1,3 +1,4 @@
 CONFIG_ARC=y
 CONFIG_TARGET_ARCANGEL4=y
 CONFIG_SYS_CLK_FREQ=70000000
+CONFIG_SYS_TEXT_BASE=0x81000000
diff --git a/configs/axs101_defconfig b/configs/axs101_defconfig
index d165e41..34ed963 100644
--- a/configs/axs101_defconfig
+++ b/configs/axs101_defconfig
@@ -2,4 +2,5 @@ CONFIG_ARC=y
 CONFIG_TARGET_AXS101=y
 CONFIG_SYS_CLK_FREQ=750000000
 CONFIG_ARC_CACHE_LINE_SHIFT=5
-CONFIG_SYS_DCACHE_OFF=y
\ No newline at end of file
+CONFIG_SYS_DCACHE_OFF=y
+CONFIG_SYS_TEXT_BASE=0x81000000
\ No newline at end of file
diff --git a/configs/tb100_defconfig b/configs/tb100_defconfig
index e17a495..b0e8c9f 100644
--- a/configs/tb100_defconfig
+++ b/configs/tb100_defconfig
@@ -2,3 +2,4 @@ CONFIG_ARC=y
 CONFIG_TARGET_TB100=y
 CONFIG_SYS_CLK_FREQ=500000000
 CONFIG_ARC_CACHE_LINE_SHIFT=5
+CONFIG_SYS_TEXT_BASE=0x84000000
diff --git a/include/configs/arcangel4.h b/include/configs/arcangel4.h
index 80d6438..5e4097f 100644
--- a/include/configs/arcangel4.h
+++ b/include/configs/arcangel4.h
@@ -15,7 +15,6 @@
 /*
  * Memory configuration
  */
-#define CONFIG_SYS_TEXT_BASE		0x81000000
 #define CONFIG_SYS_MONITOR_BASE		CONFIG_SYS_TEXT_BASE
 
 #define CONFIG_SYS_DDR_SDRAM_BASE	0x80000000
diff --git a/include/configs/axs101.h b/include/configs/axs101.h
index e9a3231..5fb8aca 100644
--- a/include/configs/axs101.h
+++ b/include/configs/axs101.h
@@ -20,7 +20,6 @@
 /*
  * Memory configuration
  */
-#define CONFIG_SYS_TEXT_BASE		0x81000000
 #define CONFIG_SYS_MONITOR_BASE		CONFIG_SYS_TEXT_BASE
 
 #define CONFIG_SYS_DDR_SDRAM_BASE	0x80000000
diff --git a/include/configs/tb100.h b/include/configs/tb100.h
index 54eca6f..46df406 100644
--- a/include/configs/tb100.h
+++ b/include/configs/tb100.h
@@ -17,7 +17,6 @@
 /*
  * Memory configuration
  */
-#define CONFIG_SYS_TEXT_BASE		0x84000000
 #define CONFIG_SYS_MONITOR_BASE		CONFIG_SYS_TEXT_BASE
 
 #define CONFIG_SYS_DDR_SDRAM_BASE	0x80000000
-- 
2.1.0

[U-Boot] [PATCH 11/12] arc: move CPU flags selection to the main "config.mk"

[Alexey Brodkin]

As a preparation to ARCv2 port submission we're moving CPU slection
flags to a common location.
Also it will allow us to have more flexible CPU specification, not only
ISA version but CPU family as well checking CONFIG_ARC_CPU_xxx.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
---
 arch/arc/config.mk           | 6 +++++-
 arch/arc/cpu/arcv1/config.mk | 7 -------
 2 files changed, 5 insertions(+), 8 deletions(-)
 delete mode 100644 arch/arc/cpu/arcv1/config.mk

diff --git a/arch/arc/config.mk b/arch/arc/config.mk
index 4f2d31f..3e75e60 100644
--- a/arch/arc/config.mk
+++ b/arch/arc/config.mk
@@ -27,8 +27,12 @@ ifdef CONFIG_ARC_MMU_VER
 CONFIG_MMU = 1
 endif
 
+ifdef CONFIG_CPU_ARC750D
+PLATFORM_CPPFLAGS += -marc700
+endif
+
 ifdef CONFIG_CPU_ARC770D
-PLATFORM_CPPFLAGS += -mlock -mswape
+PLATFORM_CPPFLAGS += -marc700 -mlock -mswape
 endif
 
 PLATFORM_CPPFLAGS += -ffixed-r25 -D__ARC__ -gdwarf-2
diff --git a/arch/arc/cpu/arcv1/config.mk b/arch/arc/cpu/arcv1/config.mk
deleted file mode 100644
index 3206ff4..0000000
--- a/arch/arc/cpu/arcv1/config.mk
+++ /dev/null
@@ -1,7 +0,0 @@
-#
-# Copyright (C) 2013-2014 Synopsys, Inc. All rights reserved.
-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
-
-PLATFORM_CPPFLAGS += -mA7
-- 
2.1.0

[U-Boot] [PATCH 12/12] arc: build libgcc in U-Boot

[Alexey Brodkin]

This way we may have very limited set of functions implemented so we
save some space.

Also it allows us to build U-Boot for any ARC core with the same one
toolchain because we don't rely on pre-built libgcc.

For example:
 * we may use little-endian toolchain but build U-Boot for ether
endianess
 * we may use non-multilibbed uClibc toolchain but build U-Boot for
whatever ARC CPU flavour that current GCC supports

Private libgcc built from generic C implementation contributes only 144
bytes to .text section so we don't see significant degradation of size:
--->8---
$ arc-linux-size u-boot.libgcc-prebuilt
   text	   data	    bss	    dec	    hex	filename
 222217	  24912	 214820	 461949	  70c7d	u-boot.libgcc-prebuilt

$ arc-linux-size u-boot.libgcc-private
   text	   data	    bss	    dec	    hex	filename
 222361	  24912	 214820	 462093	  70d0d	u-boot.libgcc-private
--->8---

Also I don't notice visible performance degradation compared to
pre-built libgcc (where at least "*div*" functions are had-written in
assembly) on typical operations of downloading 10Mb uImage over TFTP and
bootm.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
---
 arch/Kconfig                   |   1 +
 arch/arc/Kconfig               |   3 +
 arch/arc/config.mk             |   3 +
 arch/arc/lib/Makefile          |   2 +
 arch/arc/lib/_millicodethunk.S | 226 +++++++++++++++++++++++++++++++++++++++++
 arch/arc/lib/libgcc2.c         | 161 +++++++++++++++++++++++++++++
 arch/arc/lib/libgcc2.h         | 132 ++++++++++++++++++++++++
 7 files changed, 528 insertions(+)
 create mode 100644 arch/arc/lib/_millicodethunk.S
 create mode 100644 arch/arc/lib/libgcc2.c
 create mode 100644 arch/arc/lib/libgcc2.h

diff --git a/arch/Kconfig b/arch/Kconfig
index f63cc5a..132123b 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -4,6 +4,7 @@ choice
 
 config ARC
 	bool "ARC architecture"
+	select HAVE_PRIVATE_LIBGCC
 
 config ARM
 	bool "ARM architecture"
diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index 04fc7b6..a8dc4e2 100644
--- a/arch/arc/Kconfig
+++ b/arch/arc/Kconfig
@@ -4,6 +4,9 @@ menu "ARC architecture"
 config SYS_ARCH
 	default "arc"
 
+config USE_PRIVATE_LIBGCC
+	default y
+
 config SYS_CPU
 	default "arcv1"
 
diff --git a/arch/arc/config.mk b/arch/arc/config.mk
index 3e75e60..f1e81b6 100644
--- a/arch/arc/config.mk
+++ b/arch/arc/config.mk
@@ -12,11 +12,14 @@ endif
 
 ifdef CONFIG_SYS_LITTLE_ENDIAN
 ARC_CROSS_COMPILE := arc-buildroot-linux-uclibc-
+PLATFORM_LDFLAGS += -EL
+PLATFORM_CPPFLAGS += -mlittle-endian
 endif
 
 ifdef CONFIG_SYS_BIG_ENDIAN
 ARC_CROSS_COMPILE := arceb-buildroot-linux-uclibc-
 PLATFORM_LDFLAGS += -EB
+PLATFORM_CPPFLAGS += -mbig-endian
 endif
 
 ifeq ($(CROSS_COMPILE),)
diff --git a/arch/arc/lib/Makefile b/arch/arc/lib/Makefile
index bae4419..b8028c9 100644
--- a/arch/arc/lib/Makefile
+++ b/arch/arc/lib/Makefile
@@ -20,3 +20,5 @@ obj-y += reset.o
 obj-y += timer.o
 
 obj-$(CONFIG_CMD_BOOTM) += bootm.o
+
+lib-$(CONFIG_USE_PRIVATE_LIBGCC) += _millicodethunk.o libgcc2.o
diff --git a/arch/arc/lib/_millicodethunk.S b/arch/arc/lib/_millicodethunk.S
new file mode 100644
index 0000000..b332416
--- /dev/null
+++ b/arch/arc/lib/_millicodethunk.S
@@ -0,0 +1,226 @@
+/*
+ * Copyright (C) 1995, 1997, 2007-2013 Free Software Foundation, Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+ /* ANSI concatenation macros.  */
+
+ #define CONCAT1(a, b) CONCAT2(a, b)
+ #define CONCAT2(a, b) a ## b
+
+ /* Use the right prefix for global labels.  */
+
+ #define SYM(x) CONCAT1 (__USER_LABEL_PREFIX__, x)
+
+#ifndef WORKING_ASSEMBLER
+#define abs_l abs
+#define asl_l asl
+#define mov_l mov
+#endif
+
+#define FUNC(X)         .type SYM(X), at function
+#define HIDDEN_FUNC(X)	FUNC(X)` .hidden X
+#define ENDFUNC0(X)     .Lfe_##X: .size X,.Lfe_##X-X
+#define ENDFUNC(X)      ENDFUNC0(X)
+
+	.section .text
+	.align 4
+	.global SYM(__st_r13_to_r15)
+	.global SYM(__st_r13_to_r16)
+	.global SYM(__st_r13_to_r17)
+	.global SYM(__st_r13_to_r18)
+	.global SYM(__st_r13_to_r19)
+	.global SYM(__st_r13_to_r20)
+	.global SYM(__st_r13_to_r21)
+	.global SYM(__st_r13_to_r22)
+	.global SYM(__st_r13_to_r23)
+	.global SYM(__st_r13_to_r24)
+	.global SYM(__st_r13_to_r25)
+	HIDDEN_FUNC(__st_r13_to_r15)
+	HIDDEN_FUNC(__st_r13_to_r16)
+	HIDDEN_FUNC(__st_r13_to_r17)
+	HIDDEN_FUNC(__st_r13_to_r18)
+	HIDDEN_FUNC(__st_r13_to_r19)
+	HIDDEN_FUNC(__st_r13_to_r20)
+	HIDDEN_FUNC(__st_r13_to_r21)
+	HIDDEN_FUNC(__st_r13_to_r22)
+	HIDDEN_FUNC(__st_r13_to_r23)
+	HIDDEN_FUNC(__st_r13_to_r24)
+	HIDDEN_FUNC(__st_r13_to_r25)
+	.align 4
+SYM(__st_r13_to_r25):
+	st r25, [sp,48]
+SYM(__st_r13_to_r24):
+	st r24, [sp,44]
+SYM(__st_r13_to_r23):
+	st r23, [sp,40]
+SYM(__st_r13_to_r22):
+	st r22, [sp,36]
+SYM(__st_r13_to_r21):
+	st r21, [sp,32]
+SYM(__st_r13_to_r20):
+	st r20, [sp,28]
+SYM(__st_r13_to_r19):
+	st r19, [sp,24]
+SYM(__st_r13_to_r18):
+	st r18, [sp,20]
+SYM(__st_r13_to_r17):
+	st r17, [sp,16]
+SYM(__st_r13_to_r16):
+	st r16, [sp,12]
+SYM(__st_r13_to_r15):
+#ifdef __ARC700__
+	st r15, [sp,8] ; minimum function size to avoid stall: 6 bytes.
+#else
+	st_s r15, [sp,8]
+#endif
+	st_s r14, [sp,4]
+	j_s.d [%blink]
+	st_s r13, [sp,0]
+	ENDFUNC(__st_r13_to_r15)
+	ENDFUNC(__st_r13_to_r16)
+	ENDFUNC(__st_r13_to_r17)
+	ENDFUNC(__st_r13_to_r18)
+	ENDFUNC(__st_r13_to_r19)
+	ENDFUNC(__st_r13_to_r20)
+	ENDFUNC(__st_r13_to_r21)
+	ENDFUNC(__st_r13_to_r22)
+	ENDFUNC(__st_r13_to_r23)
+	ENDFUNC(__st_r13_to_r24)
+	ENDFUNC(__st_r13_to_r25)
+
+	.section .text
+	.align 4
+;	==================================
+;	the loads
+
+	.global SYM(__ld_r13_to_r15)
+	.global SYM(__ld_r13_to_r16)
+	.global SYM(__ld_r13_to_r17)
+	.global SYM(__ld_r13_to_r18)
+	.global SYM(__ld_r13_to_r19)
+	.global SYM(__ld_r13_to_r20)
+	.global SYM(__ld_r13_to_r21)
+	.global SYM(__ld_r13_to_r22)
+	.global SYM(__ld_r13_to_r23)
+	.global SYM(__ld_r13_to_r24)
+	.global SYM(__ld_r13_to_r25)
+	HIDDEN_FUNC(__ld_r13_to_r15)
+	HIDDEN_FUNC(__ld_r13_to_r16)
+	HIDDEN_FUNC(__ld_r13_to_r17)
+	HIDDEN_FUNC(__ld_r13_to_r18)
+	HIDDEN_FUNC(__ld_r13_to_r19)
+	HIDDEN_FUNC(__ld_r13_to_r20)
+	HIDDEN_FUNC(__ld_r13_to_r21)
+	HIDDEN_FUNC(__ld_r13_to_r22)
+	HIDDEN_FUNC(__ld_r13_to_r23)
+	HIDDEN_FUNC(__ld_r13_to_r24)
+	HIDDEN_FUNC(__ld_r13_to_r25)
+SYM(__ld_r13_to_r25):
+	ld r25, [sp,48]
+SYM(__ld_r13_to_r24):
+	ld r24, [sp,44]
+SYM(__ld_r13_to_r23):
+	ld r23, [sp,40]
+SYM(__ld_r13_to_r22):
+	ld r22, [sp,36]
+SYM(__ld_r13_to_r21):
+	ld r21, [sp,32]
+SYM(__ld_r13_to_r20):
+	ld r20, [sp,28]
+SYM(__ld_r13_to_r19):
+	ld r19, [sp,24]
+SYM(__ld_r13_to_r18):
+	ld r18, [sp,20]
+SYM(__ld_r13_to_r17):
+	ld r17, [sp,16]
+SYM(__ld_r13_to_r16):
+	ld r16, [sp,12]
+SYM(__ld_r13_to_r15):
+#ifdef __ARC700__
+	ld r15, [sp,8] ; minimum function size to avoid stall: 6 bytes.
+#else
+	ld_s r15, [sp,8]
+#endif
+	ld_s r14, [sp,4]
+	j_s.d [%blink]
+	ld_s r13, [sp,0]
+	ENDFUNC(__ld_r13_to_r15)
+	ENDFUNC(__ld_r13_to_r16)
+	ENDFUNC(__ld_r13_to_r17)
+	ENDFUNC(__ld_r13_to_r18)
+	ENDFUNC(__ld_r13_to_r19)
+	ENDFUNC(__ld_r13_to_r20)
+	ENDFUNC(__ld_r13_to_r21)
+	ENDFUNC(__ld_r13_to_r22)
+	ENDFUNC(__ld_r13_to_r23)
+	ENDFUNC(__ld_r13_to_r24)
+	ENDFUNC(__ld_r13_to_r25)
+
+	.global SYM(__ld_r13_to_r14_ret)
+	.global SYM(__ld_r13_to_r15_ret)
+	.global SYM(__ld_r13_to_r16_ret)
+	.global SYM(__ld_r13_to_r17_ret)
+	.global SYM(__ld_r13_to_r18_ret)
+	.global SYM(__ld_r13_to_r19_ret)
+	.global SYM(__ld_r13_to_r20_ret)
+	.global SYM(__ld_r13_to_r21_ret)
+	.global SYM(__ld_r13_to_r22_ret)
+	.global SYM(__ld_r13_to_r23_ret)
+	.global SYM(__ld_r13_to_r24_ret)
+	.global SYM(__ld_r13_to_r25_ret)
+	HIDDEN_FUNC(__ld_r13_to_r14_ret)
+	HIDDEN_FUNC(__ld_r13_to_r15_ret)
+	HIDDEN_FUNC(__ld_r13_to_r16_ret)
+	HIDDEN_FUNC(__ld_r13_to_r17_ret)
+	HIDDEN_FUNC(__ld_r13_to_r18_ret)
+	HIDDEN_FUNC(__ld_r13_to_r19_ret)
+	HIDDEN_FUNC(__ld_r13_to_r20_ret)
+	HIDDEN_FUNC(__ld_r13_to_r21_ret)
+	HIDDEN_FUNC(__ld_r13_to_r22_ret)
+	HIDDEN_FUNC(__ld_r13_to_r23_ret)
+	HIDDEN_FUNC(__ld_r13_to_r24_ret)
+	HIDDEN_FUNC(__ld_r13_to_r25_ret)
+	.section .text
+	.align 4
+SYM(__ld_r13_to_r25_ret):
+	ld r25, [sp,48]
+SYM(__ld_r13_to_r24_ret):
+	ld r24, [sp,44]
+SYM(__ld_r13_to_r23_ret):
+	ld r23, [sp,40]
+SYM(__ld_r13_to_r22_ret):
+	ld r22, [sp,36]
+SYM(__ld_r13_to_r21_ret):
+	ld r21, [sp,32]
+SYM(__ld_r13_to_r20_ret):
+	ld r20, [sp,28]
+SYM(__ld_r13_to_r19_ret):
+	ld r19, [sp,24]
+SYM(__ld_r13_to_r18_ret):
+	ld r18, [sp,20]
+SYM(__ld_r13_to_r17_ret):
+	ld r17, [sp,16]
+SYM(__ld_r13_to_r16_ret):
+	ld r16, [sp,12]
+SYM(__ld_r13_to_r15_ret):
+	ld r15, [sp,8]
+SYM(__ld_r13_to_r14_ret):
+	ld blink,[sp,r12]
+	ld_s r14, [sp,4]
+	ld.ab r13, [sp,r12]
+	j_s.d [%blink]
+	add_s sp,sp,4
+	ENDFUNC(__ld_r13_to_r14_ret)
+	ENDFUNC(__ld_r13_to_r15_ret)
+	ENDFUNC(__ld_r13_to_r16_ret)
+	ENDFUNC(__ld_r13_to_r17_ret)
+	ENDFUNC(__ld_r13_to_r18_ret)
+	ENDFUNC(__ld_r13_to_r19_ret)
+	ENDFUNC(__ld_r13_to_r20_ret)
+	ENDFUNC(__ld_r13_to_r21_ret)
+	ENDFUNC(__ld_r13_to_r22_ret)
+	ENDFUNC(__ld_r13_to_r23_ret)
+	ENDFUNC(__ld_r13_to_r24_ret)
+	ENDFUNC(__ld_r13_to_r25_ret)
diff --git a/arch/arc/lib/libgcc2.c b/arch/arc/lib/libgcc2.c
new file mode 100644
index 0000000..d5ad327
--- /dev/null
+++ b/arch/arc/lib/libgcc2.c
@@ -0,0 +1,161 @@
+/*
+ * Copyright (C) 1989-2013 Free Software Foundation, Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include "libgcc2.h"
+
+DWtype
+__ashldi3(DWtype u, shift_count_type b)
+{
+	if (b == 0)
+		return u;
+
+	const DWunion uu = {.ll = u};
+	const shift_count_type bm = W_TYPE_SIZE - b;
+	DWunion w;
+
+	if (bm <= 0) {
+		w.s.low = 0;
+		w.s.high = (UWtype)uu.s.low << -bm;
+	} else {
+		const UWtype carries = (UWtype) uu.s.low >> bm;
+
+		w.s.low = (UWtype)uu.s.low << b;
+		w.s.high = ((UWtype)uu.s.high << b) | carries;
+	}
+
+	return w.ll;
+}
+
+DWtype
+__ashrdi3(DWtype u, shift_count_type b)
+{
+	if (b == 0)
+		return u;
+
+	const DWunion uu = {.ll = u};
+	const shift_count_type bm = W_TYPE_SIZE - b;
+	DWunion w;
+
+	if (bm <= 0) {
+		/* w.s.high = 1..1 or 0..0 */
+		w.s.high = uu.s.high >> (W_TYPE_SIZE - 1);
+		w.s.low = uu.s.high >> -bm;
+	} else {
+		const UWtype carries = (UWtype) uu.s.high << bm;
+
+		w.s.high = uu.s.high >> b;
+		w.s.low = ((UWtype)uu.s.low >> b) | carries;
+	}
+
+	return w.ll;
+}
+
+DWtype
+__lshrdi3(DWtype u, shift_count_type b)
+{
+	if (b == 0)
+		return u;
+
+	const DWunion uu = {.ll = u};
+	const shift_count_type bm = W_TYPE_SIZE - b;
+	DWunion w;
+
+	if (bm <= 0) {
+		w.s.high = 0;
+		w.s.low = (UWtype)uu.s.high >> -bm;
+	} else {
+		const UWtype carries = (UWtype)uu.s.high << bm;
+
+		w.s.high = (UWtype)uu.s.high >> b;
+		w.s.low = ((UWtype)uu.s.low >> b) | carries;
+	}
+
+	return w.ll;
+}
+
+unsigned long
+udivmodsi4(unsigned long num, unsigned long den, int modwanted)
+{
+	unsigned long bit = 1;
+	unsigned long res = 0;
+
+	while (den < num && bit && !(den & (1L<<31))) {
+		den <<= 1;
+		bit <<= 1;
+	}
+
+	while (bit) {
+		if (num >= den) {
+			num -= den;
+			res |= bit;
+		}
+		bit >>= 1;
+		den >>= 1;
+	}
+
+	if (modwanted)
+		return num;
+
+	return res;
+}
+
+long
+__divsi3(long a, long b)
+{
+	int neg = 0;
+	long res;
+
+	if (a < 0) {
+		a = -a;
+		neg = !neg;
+	}
+
+	if (b < 0) {
+		b = -b;
+		neg = !neg;
+	}
+
+	res = udivmodsi4(a, b, 0);
+
+	if (neg)
+		res = -res;
+
+	return res;
+}
+
+long
+__modsi3(long a, long b)
+{
+	int neg = 0;
+	long res;
+
+	if (a < 0) {
+		a = -a;
+		neg = 1;
+	}
+
+	if (b < 0)
+		b = -b;
+
+	res = udivmodsi4(a, b, 1);
+
+	if (neg)
+		res = -res;
+
+	return res;
+}
+
+long
+__udivsi3(long a, long b)
+{
+	return udivmodsi4(a, b, 0);
+}
+
+long
+__umodsi3(long a, long b)
+{
+	return udivmodsi4(a, b, 1);
+}
diff --git a/arch/arc/lib/libgcc2.h b/arch/arc/lib/libgcc2.h
new file mode 100644
index 0000000..8813c3b
--- /dev/null
+++ b/arch/arc/lib/libgcc2.h
@@ -0,0 +1,132 @@
+/*
+ * Copyright (C) 1989-2013 Free Software Foundation, Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef __ASM_LIBGCC_H
+#define __ASM_LIBGCC_H
+
+#define UNITS_PER_WORD 4	/* for ARC */
+#define BITS_PER_UNIT 8		/* for ARC */
+
+#define W_TYPE_SIZE (4 * BITS_PER_UNIT)
+
+#define MIN_UNITS_PER_WORD UNITS_PER_WORD
+
+/* Work out the largest "word" size that we can deal with on this target.  */
+#if MIN_UNITS_PER_WORD > 4
+# define LIBGCC2_MAX_UNITS_PER_WORD 8
+#elif (MIN_UNITS_PER_WORD > 2 \
+       || (MIN_UNITS_PER_WORD > 1 && __SIZEOF_LONG_LONG__ > 4))
+# define LIBGCC2_MAX_UNITS_PER_WORD 4
+#else
+# define LIBGCC2_MAX_UNITS_PER_WORD MIN_UNITS_PER_WORD
+#endif
+
+/* Work out what word size we are using for this compilation.
+   The value can be set on the command line.  */
+#ifndef LIBGCC2_UNITS_PER_WORD
+#define LIBGCC2_UNITS_PER_WORD LIBGCC2_MAX_UNITS_PER_WORD
+#endif
+
+typedef		 int QItype	__attribute__ ((mode (QI)));
+typedef unsigned int UQItype	__attribute__ ((mode (QI)));
+typedef		 int HItype	__attribute__ ((mode (HI)));
+typedef unsigned int UHItype	__attribute__ ((mode (HI)));
+#if MIN_UNITS_PER_WORD > 1
+/* These typedefs are usually forbidden on dsp's with UNITS_PER_WORD 1.  */
+typedef 	 int SItype	__attribute__ ((mode (SI)));
+typedef unsigned int USItype	__attribute__ ((mode (SI)));
+#if __SIZEOF_LONG_LONG__ > 4
+/* These typedefs are usually forbidden on archs with UNITS_PER_WORD 2.  */
+typedef		 int DItype	__attribute__ ((mode (DI)));
+typedef unsigned int UDItype	__attribute__ ((mode (DI)));
+#if MIN_UNITS_PER_WORD > 4
+/* These typedefs are usually forbidden on archs with UNITS_PER_WORD 4.  */
+typedef		 int TItype	__attribute__ ((mode (TI)));
+typedef unsigned int UTItype	__attribute__ ((mode (TI)));
+#endif
+#endif
+#endif
+
+#if LIBGCC2_UNITS_PER_WORD == 8
+#define W_TYPE_SIZE (8 * BITS_PER_UNIT)
+#define Wtype	DItype
+#define UWtype	UDItype
+#define HWtype	DItype
+#define UHWtype	UDItype
+#define DWtype	TItype
+#define UDWtype	UTItype
+#ifdef LIBGCC2_GNU_PREFIX
+#define __NW(a,b)	__gnu_ ## a ## di ## b
+#define __NDW(a,b)	__gnu_ ## a ## ti ## b
+#else
+#define __NW(a,b)	__ ## a ## di ## b
+#define __NDW(a,b)	__ ## a ## ti ## b
+#endif
+#elif LIBGCC2_UNITS_PER_WORD == 4
+#define W_TYPE_SIZE (4 * BITS_PER_UNIT)
+#define Wtype	SItype
+#define UWtype	USItype
+#define HWtype	SItype
+#define UHWtype	USItype
+#define DWtype	DItype
+#define UDWtype	UDItype
+#ifdef LIBGCC2_GNU_PREFIX
+#define __NW(a,b)	__gnu_ ## a ## si ## b
+#define __NDW(a,b)	__gnu_ ## a ## di ## b
+#else
+#define __NW(a,b)	__ ## a ## si ## b
+#define __NDW(a,b)	__ ## a ## di ## b
+#endif
+#elif LIBGCC2_UNITS_PER_WORD == 2
+#define W_TYPE_SIZE (2 * BITS_PER_UNIT)
+#define Wtype	HItype
+#define UWtype	UHItype
+#define HWtype	HItype
+#define UHWtype	UHItype
+#define DWtype	SItype
+#define UDWtype	USItype
+#ifdef LIBGCC2_GNU_PREFIX
+#define __NW(a,b)	__gnu_ ## a ## hi ## b
+#define __NDW(a,b)	__gnu_ ## a ## si ## b
+#else
+#define __NW(a,b)	__ ## a ## hi ## b
+#define __NDW(a,b)	__ ## a ## si ## b
+#endif
+#else
+#define W_TYPE_SIZE BITS_PER_UNIT
+#define Wtype	QItype
+#define UWtype  UQItype
+#define HWtype	QItype
+#define UHWtype	UQItype
+#define DWtype	HItype
+#define UDWtype	UHItype
+#ifdef LIBGCC2_GNU_PREFIX
+#define __NW(a,b)	__gnu_ ## a ## qi ## b
+#define __NDW(a,b)	__gnu_ ## a ## hi ## b
+#else
+#define __NW(a,b)	__ ## a ## qi ## b
+#define __NDW(a,b)	__ ## a ## hi ## b
+#endif
+#endif
+
+typedef int shift_count_type __attribute__((mode (__libgcc_shift_count__)));
+
+#if __BYTE_ORDER__ != __ORDER_LITTLE_ENDIAN__
+	struct DWstruct {Wtype high, low;};
+#else
+	struct DWstruct {Wtype low, high;};
+#endif
+
+/* We need this union to unpack/pack DImode values, since we don't have
+   any arithmetic yet.  Incoming DImode parameters are stored into the
+   `ll' field, and the unpacked result is read from the struct `s'.  */
+
+typedef union {
+	struct DWstruct s;
+	DWtype ll;
+} DWunion;
+
+#endif /* __ASM_LIBGCC_H */
-- 
2.1.0