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From: "Mylène Josserand" <mylene.josserand@bootlin.com>
To: linux@armlinux.org.uk, maxime.ripard@bootlin.com, wens@csie.org,
	marc.zyngier@arm.com, mark.rutland@arm.com, robh+dt@kernel.org,
	horms@verge.net.au, geert@linux-m68k.org, magnus.damm@gmail.com
Cc: linux-renesas-soc@vger.kernel.org, devicetree@vger.kernel.org,
	clabbe.montjoie@gmail.com, quentin.schulz@bootlin.com,
	thomas.petazzoni@bootlin.com,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, mylene.josserand@bootlin.com
Subject: [PATCH v8 02/12] ARM: sunxi: smp: Move assembly code into a file
Date: Tue,  1 May 2018 14:31:21 +0200	[thread overview]
Message-ID: <20180501123131.7738-3-mylene.josserand@bootlin.com> (raw)
In-Reply-To: <20180501123131.7738-1-mylene.josserand@bootlin.com>

Move the assembly code for cluster cache enabling and resuming
into an assembly file instead of having it directly in C code.

Remove the CFLAGS because we are using the ARM directive "arch"
instead.

Signed-off-by: Mylène Josserand <mylene.josserand@bootlin.com>
---
 arch/arm/mach-sunxi/Makefile  |  2 +-
 arch/arm/mach-sunxi/headsmp.S | 80 +++++++++++++++++++++++++++++++++++++++++
 arch/arm/mach-sunxi/mc_smp.c  | 82 +++----------------------------------------
 3 files changed, 85 insertions(+), 79 deletions(-)
 create mode 100644 arch/arm/mach-sunxi/headsmp.S

diff --git a/arch/arm/mach-sunxi/Makefile b/arch/arm/mach-sunxi/Makefile
index 7de9cc286d53..71429aa85143 100644
--- a/arch/arm/mach-sunxi/Makefile
+++ b/arch/arm/mach-sunxi/Makefile
@@ -1,5 +1,5 @@
 CFLAGS_mc_smp.o	+= -march=armv7-a
 
 obj-$(CONFIG_ARCH_SUNXI) += sunxi.o
-obj-$(CONFIG_ARCH_SUNXI_MC_SMP) += mc_smp.o
+obj-$(CONFIG_ARCH_SUNXI_MC_SMP) += mc_smp.o headsmp.o
 obj-$(CONFIG_SMP) += platsmp.o
diff --git a/arch/arm/mach-sunxi/headsmp.S b/arch/arm/mach-sunxi/headsmp.S
new file mode 100644
index 000000000000..37dc772701f3
--- /dev/null
+++ b/arch/arm/mach-sunxi/headsmp.S
@@ -0,0 +1,80 @@
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * Copyright (c) 2018 Chen-Yu Tsai
+ * Copyright (c) 2018 Bootlin
+ *
+ * Chen-Yu Tsai <wens@csie.org>
+ * Mylène Josserand <mylene.josserand@bootlin.com>
+ *
+ * SMP support for sunxi based systems with Cortex A7/A15
+ *
+ */
+
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+#include <asm/cputype.h>
+
+ENTRY(sunxi_mc_smp_cluster_cache_enable)
+	.arch	armv7-a
+	/*
+	 * Enable cluster-level coherency, in preparation for turning on the MMU.
+	 *
+	 * Also enable regional clock gating and L2 data latency settings for
+	 * Cortex-A15. These settings are from the vendor kernel.
+	 */
+	mrc	p15, 0, r1, c0, c0, 0
+	movw	r2, #(ARM_CPU_PART_MASK & 0xffff)
+	movt	r2, #(ARM_CPU_PART_MASK >> 16)
+	and	r1, r1, r2
+	movw	r2, #(ARM_CPU_PART_CORTEX_A15 & 0xffff)
+	movt	r2, #(ARM_CPU_PART_CORTEX_A15 >> 16)
+	cmp	r1, r2
+	bne	not_a15
+
+	/* The following is Cortex-A15 specific */
+
+	/* ACTLR2: Enable CPU regional clock gates */
+	mrc p15, 1, r1, c15, c0, 4
+	orr r1, r1, #(0x1 << 31)
+	mcr p15, 1, r1, c15, c0, 4
+
+	/* L2ACTLR */
+	mrc p15, 1, r1, c15, c0, 0
+	/* Enable L2, GIC, and Timer regional clock gates */
+	orr r1, r1, #(0x1 << 26)
+	/* Disable clean/evict from being pushed to external */
+	orr r1, r1, #(0x1<<3)
+	mcr p15, 1, r1, c15, c0, 0
+
+	/* L2CTRL: L2 data RAM latency */
+	mrc p15, 1, r1, c9, c0, 2
+	bic r1, r1, #(0x7 << 0)
+	orr r1, r1, #(0x3 << 0)
+	mcr p15, 1, r1, c9, c0, 2
+
+	/* End of Cortex-A15 specific setup */
+	not_a15:
+
+	/* Get value of sunxi_mc_smp_first_comer */
+	adr	r1, first
+	ldr	r0, [r1]
+	ldr	r0, [r1, r0]
+
+	/* Skip cci_enable_port_for_self if not first comer */
+	cmp	r0, #0
+	bxeq	lr
+	b	cci_enable_port_for_self
+
+	.align 2
+	first: .word sunxi_mc_smp_first_comer - .
+ENDPROC(sunxi_mc_smp_cluster_cache_enable)
+
+ENTRY(sunxi_mc_smp_secondary_startup)
+	bl	sunxi_mc_smp_cluster_cache_enable
+	b	secondary_startup
+ENDPROC(sunxi_mc_smp_secondary_startup)
+
+ENTRY(sunxi_mc_smp_resume)
+	bl	sunxi_mc_smp_cluster_cache_enable
+	b	cpu_resume
+ENDPROC(sunxi_mc_smp_resume)
diff --git a/arch/arm/mach-sunxi/mc_smp.c b/arch/arm/mach-sunxi/mc_smp.c
index c0246ec54a0a..727968d6a3e5 100644
--- a/arch/arm/mach-sunxi/mc_smp.c
+++ b/arch/arm/mach-sunxi/mc_smp.c
@@ -72,6 +72,9 @@ static void __iomem *cpucfg_base;
 static void __iomem *prcm_base;
 static void __iomem *sram_b_smp_base;
 
+extern void sunxi_mc_smp_secondary_startup(void);
+extern void sunxi_mc_smp_resume(void);
+
 static bool sunxi_core_is_cortex_a15(unsigned int core, unsigned int cluster)
 {
 	struct device_node *node;
@@ -300,74 +303,7 @@ static void sunxi_cluster_cache_disable_without_axi(void)
 }
 
 static int sunxi_mc_smp_cpu_table[SUNXI_NR_CLUSTERS][SUNXI_CPUS_PER_CLUSTER];
-static int sunxi_mc_smp_first_comer;
-
-/*
- * Enable cluster-level coherency, in preparation for turning on the MMU.
- *
- * Also enable regional clock gating and L2 data latency settings for
- * Cortex-A15. These settings are from the vendor kernel.
- */
-static void __naked sunxi_mc_smp_cluster_cache_enable(void)
-{
-	asm volatile (
-		"mrc	p15, 0, r1, c0, c0, 0\n"
-		"movw	r2, #" __stringify(ARM_CPU_PART_MASK & 0xffff) "\n"
-		"movt	r2, #" __stringify(ARM_CPU_PART_MASK >> 16) "\n"
-		"and	r1, r1, r2\n"
-		"movw	r2, #" __stringify(ARM_CPU_PART_CORTEX_A15 & 0xffff) "\n"
-		"movt	r2, #" __stringify(ARM_CPU_PART_CORTEX_A15 >> 16) "\n"
-		"cmp	r1, r2\n"
-		"bne	not_a15\n"
-
-		/* The following is Cortex-A15 specific */
-
-		/* ACTLR2: Enable CPU regional clock gates */
-		"mrc p15, 1, r1, c15, c0, 4\n"
-		"orr r1, r1, #(0x1<<31)\n"
-		"mcr p15, 1, r1, c15, c0, 4\n"
-
-		/* L2ACTLR */
-		"mrc p15, 1, r1, c15, c0, 0\n"
-		/* Enable L2, GIC, and Timer regional clock gates */
-		"orr r1, r1, #(0x1<<26)\n"
-		/* Disable clean/evict from being pushed to external */
-		"orr r1, r1, #(0x1<<3)\n"
-		"mcr p15, 1, r1, c15, c0, 0\n"
-
-		/* L2CTRL: L2 data RAM latency */
-		"mrc p15, 1, r1, c9, c0, 2\n"
-		"bic r1, r1, #(0x7<<0)\n"
-		"orr r1, r1, #(0x3<<0)\n"
-		"mcr p15, 1, r1, c9, c0, 2\n"
-
-		/* End of Cortex-A15 specific setup */
-		"not_a15:\n"
-
-		/* Get value of sunxi_mc_smp_first_comer */
-		"adr	r1, first\n"
-		"ldr	r0, [r1]\n"
-		"ldr	r0, [r1, r0]\n"
-
-		/* Skip cci_enable_port_for_self if not first comer */
-		"cmp	r0, #0\n"
-		"bxeq	lr\n"
-		"b	cci_enable_port_for_self\n"
-
-		".align 2\n"
-		"first: .word sunxi_mc_smp_first_comer - .\n"
-	);
-}
-
-static void __naked sunxi_mc_smp_secondary_startup(void)
-{
-	asm volatile(
-		"bl	sunxi_mc_smp_cluster_cache_enable\n"
-		"b	secondary_startup"
-		/* Let compiler know about sunxi_mc_smp_cluster_cache_enable */
-		:: "i" (sunxi_mc_smp_cluster_cache_enable)
-	);
-}
+int sunxi_mc_smp_first_comer;
 
 static DEFINE_SPINLOCK(boot_lock);
 
@@ -637,16 +573,6 @@ static bool __init sunxi_mc_smp_cpu_table_init(void)
  */
 typedef typeof(cpu_reset) phys_reset_t;
 
-static void __init __naked sunxi_mc_smp_resume(void)
-{
-	asm volatile(
-		"bl	sunxi_mc_smp_cluster_cache_enable\n"
-		"b	cpu_resume"
-		/* Let compiler know about sunxi_mc_smp_cluster_cache_enable */
-		:: "i" (sunxi_mc_smp_cluster_cache_enable)
-	);
-}
-
 static int __init nocache_trampoline(unsigned long __unused)
 {
 	phys_reset_t phys_reset;
-- 
2.11.0

WARNING: multiple messages have this Message-ID (diff)
From: mylene.josserand@bootlin.com (Mylène Josserand)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v8 02/12] ARM: sunxi: smp: Move assembly code into a file
Date: Tue,  1 May 2018 14:31:21 +0200	[thread overview]
Message-ID: <20180501123131.7738-3-mylene.josserand@bootlin.com> (raw)
In-Reply-To: <20180501123131.7738-1-mylene.josserand@bootlin.com>

Move the assembly code for cluster cache enabling and resuming
into an assembly file instead of having it directly in C code.

Remove the CFLAGS because we are using the ARM directive "arch"
instead.

Signed-off-by: Myl?ne Josserand <mylene.josserand@bootlin.com>
---
 arch/arm/mach-sunxi/Makefile  |  2 +-
 arch/arm/mach-sunxi/headsmp.S | 80 +++++++++++++++++++++++++++++++++++++++++
 arch/arm/mach-sunxi/mc_smp.c  | 82 +++----------------------------------------
 3 files changed, 85 insertions(+), 79 deletions(-)
 create mode 100644 arch/arm/mach-sunxi/headsmp.S

diff --git a/arch/arm/mach-sunxi/Makefile b/arch/arm/mach-sunxi/Makefile
index 7de9cc286d53..71429aa85143 100644
--- a/arch/arm/mach-sunxi/Makefile
+++ b/arch/arm/mach-sunxi/Makefile
@@ -1,5 +1,5 @@
 CFLAGS_mc_smp.o	+= -march=armv7-a
 
 obj-$(CONFIG_ARCH_SUNXI) += sunxi.o
-obj-$(CONFIG_ARCH_SUNXI_MC_SMP) += mc_smp.o
+obj-$(CONFIG_ARCH_SUNXI_MC_SMP) += mc_smp.o headsmp.o
 obj-$(CONFIG_SMP) += platsmp.o
diff --git a/arch/arm/mach-sunxi/headsmp.S b/arch/arm/mach-sunxi/headsmp.S
new file mode 100644
index 000000000000..37dc772701f3
--- /dev/null
+++ b/arch/arm/mach-sunxi/headsmp.S
@@ -0,0 +1,80 @@
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * Copyright (c) 2018 Chen-Yu Tsai
+ * Copyright (c) 2018 Bootlin
+ *
+ * Chen-Yu Tsai <wens@csie.org>
+ * Myl?ne Josserand <mylene.josserand@bootlin.com>
+ *
+ * SMP support for sunxi based systems with Cortex A7/A15
+ *
+ */
+
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+#include <asm/cputype.h>
+
+ENTRY(sunxi_mc_smp_cluster_cache_enable)
+	.arch	armv7-a
+	/*
+	 * Enable cluster-level coherency, in preparation for turning on the MMU.
+	 *
+	 * Also enable regional clock gating and L2 data latency settings for
+	 * Cortex-A15. These settings are from the vendor kernel.
+	 */
+	mrc	p15, 0, r1, c0, c0, 0
+	movw	r2, #(ARM_CPU_PART_MASK & 0xffff)
+	movt	r2, #(ARM_CPU_PART_MASK >> 16)
+	and	r1, r1, r2
+	movw	r2, #(ARM_CPU_PART_CORTEX_A15 & 0xffff)
+	movt	r2, #(ARM_CPU_PART_CORTEX_A15 >> 16)
+	cmp	r1, r2
+	bne	not_a15
+
+	/* The following is Cortex-A15 specific */
+
+	/* ACTLR2: Enable CPU regional clock gates */
+	mrc p15, 1, r1, c15, c0, 4
+	orr r1, r1, #(0x1 << 31)
+	mcr p15, 1, r1, c15, c0, 4
+
+	/* L2ACTLR */
+	mrc p15, 1, r1, c15, c0, 0
+	/* Enable L2, GIC, and Timer regional clock gates */
+	orr r1, r1, #(0x1 << 26)
+	/* Disable clean/evict from being pushed to external */
+	orr r1, r1, #(0x1<<3)
+	mcr p15, 1, r1, c15, c0, 0
+
+	/* L2CTRL: L2 data RAM latency */
+	mrc p15, 1, r1, c9, c0, 2
+	bic r1, r1, #(0x7 << 0)
+	orr r1, r1, #(0x3 << 0)
+	mcr p15, 1, r1, c9, c0, 2
+
+	/* End of Cortex-A15 specific setup */
+	not_a15:
+
+	/* Get value of sunxi_mc_smp_first_comer */
+	adr	r1, first
+	ldr	r0, [r1]
+	ldr	r0, [r1, r0]
+
+	/* Skip cci_enable_port_for_self if not first comer */
+	cmp	r0, #0
+	bxeq	lr
+	b	cci_enable_port_for_self
+
+	.align 2
+	first: .word sunxi_mc_smp_first_comer - .
+ENDPROC(sunxi_mc_smp_cluster_cache_enable)
+
+ENTRY(sunxi_mc_smp_secondary_startup)
+	bl	sunxi_mc_smp_cluster_cache_enable
+	b	secondary_startup
+ENDPROC(sunxi_mc_smp_secondary_startup)
+
+ENTRY(sunxi_mc_smp_resume)
+	bl	sunxi_mc_smp_cluster_cache_enable
+	b	cpu_resume
+ENDPROC(sunxi_mc_smp_resume)
diff --git a/arch/arm/mach-sunxi/mc_smp.c b/arch/arm/mach-sunxi/mc_smp.c
index c0246ec54a0a..727968d6a3e5 100644
--- a/arch/arm/mach-sunxi/mc_smp.c
+++ b/arch/arm/mach-sunxi/mc_smp.c
@@ -72,6 +72,9 @@ static void __iomem *cpucfg_base;
 static void __iomem *prcm_base;
 static void __iomem *sram_b_smp_base;
 
+extern void sunxi_mc_smp_secondary_startup(void);
+extern void sunxi_mc_smp_resume(void);
+
 static bool sunxi_core_is_cortex_a15(unsigned int core, unsigned int cluster)
 {
 	struct device_node *node;
@@ -300,74 +303,7 @@ static void sunxi_cluster_cache_disable_without_axi(void)
 }
 
 static int sunxi_mc_smp_cpu_table[SUNXI_NR_CLUSTERS][SUNXI_CPUS_PER_CLUSTER];
-static int sunxi_mc_smp_first_comer;
-
-/*
- * Enable cluster-level coherency, in preparation for turning on the MMU.
- *
- * Also enable regional clock gating and L2 data latency settings for
- * Cortex-A15. These settings are from the vendor kernel.
- */
-static void __naked sunxi_mc_smp_cluster_cache_enable(void)
-{
-	asm volatile (
-		"mrc	p15, 0, r1, c0, c0, 0\n"
-		"movw	r2, #" __stringify(ARM_CPU_PART_MASK & 0xffff) "\n"
-		"movt	r2, #" __stringify(ARM_CPU_PART_MASK >> 16) "\n"
-		"and	r1, r1, r2\n"
-		"movw	r2, #" __stringify(ARM_CPU_PART_CORTEX_A15 & 0xffff) "\n"
-		"movt	r2, #" __stringify(ARM_CPU_PART_CORTEX_A15 >> 16) "\n"
-		"cmp	r1, r2\n"
-		"bne	not_a15\n"
-
-		/* The following is Cortex-A15 specific */
-
-		/* ACTLR2: Enable CPU regional clock gates */
-		"mrc p15, 1, r1, c15, c0, 4\n"
-		"orr r1, r1, #(0x1<<31)\n"
-		"mcr p15, 1, r1, c15, c0, 4\n"
-
-		/* L2ACTLR */
-		"mrc p15, 1, r1, c15, c0, 0\n"
-		/* Enable L2, GIC, and Timer regional clock gates */
-		"orr r1, r1, #(0x1<<26)\n"
-		/* Disable clean/evict from being pushed to external */
-		"orr r1, r1, #(0x1<<3)\n"
-		"mcr p15, 1, r1, c15, c0, 0\n"
-
-		/* L2CTRL: L2 data RAM latency */
-		"mrc p15, 1, r1, c9, c0, 2\n"
-		"bic r1, r1, #(0x7<<0)\n"
-		"orr r1, r1, #(0x3<<0)\n"
-		"mcr p15, 1, r1, c9, c0, 2\n"
-
-		/* End of Cortex-A15 specific setup */
-		"not_a15:\n"
-
-		/* Get value of sunxi_mc_smp_first_comer */
-		"adr	r1, first\n"
-		"ldr	r0, [r1]\n"
-		"ldr	r0, [r1, r0]\n"
-
-		/* Skip cci_enable_port_for_self if not first comer */
-		"cmp	r0, #0\n"
-		"bxeq	lr\n"
-		"b	cci_enable_port_for_self\n"
-
-		".align 2\n"
-		"first: .word sunxi_mc_smp_first_comer - .\n"
-	);
-}
-
-static void __naked sunxi_mc_smp_secondary_startup(void)
-{
-	asm volatile(
-		"bl	sunxi_mc_smp_cluster_cache_enable\n"
-		"b	secondary_startup"
-		/* Let compiler know about sunxi_mc_smp_cluster_cache_enable */
-		:: "i" (sunxi_mc_smp_cluster_cache_enable)
-	);
-}
+int sunxi_mc_smp_first_comer;
 
 static DEFINE_SPINLOCK(boot_lock);
 
@@ -637,16 +573,6 @@ static bool __init sunxi_mc_smp_cpu_table_init(void)
  */
 typedef typeof(cpu_reset) phys_reset_t;
 
-static void __init __naked sunxi_mc_smp_resume(void)
-{
-	asm volatile(
-		"bl	sunxi_mc_smp_cluster_cache_enable\n"
-		"b	cpu_resume"
-		/* Let compiler know about sunxi_mc_smp_cluster_cache_enable */
-		:: "i" (sunxi_mc_smp_cluster_cache_enable)
-	);
-}
-
 static int __init nocache_trampoline(unsigned long __unused)
 {
 	phys_reset_t phys_reset;
-- 
2.11.0

  parent reply	other threads:[~2018-05-01 12:32 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-01 12:31 [PATCH v8 00/12] Sunxi: Add SMP support on A83T Mylène Josserand
2018-05-01 12:31 ` Mylène Josserand
2018-05-01 12:31 ` [PATCH v8 01/12] ARM: Allow this header to be included by assembly files Mylène Josserand
2018-05-01 12:31   ` Mylène Josserand
2018-05-01 12:31 ` Mylène Josserand [this message]
2018-05-01 12:31   ` [PATCH v8 02/12] ARM: sunxi: smp: Move assembly code into a file Mylène Josserand
2018-05-02 13:18   ` Maxime Ripard
2018-05-02 13:18     ` Maxime Ripard
2018-05-01 12:31 ` [PATCH v8 03/12] ARM: dts: sun8i: Add CPUCFG device node for A83T dtsi Mylène Josserand
2018-05-01 12:31   ` Mylène Josserand
2018-05-01 12:31 ` [PATCH v8 04/12] ARM: dts: sun8i: Add R_CPUCFG device node for the " Mylène Josserand
2018-05-01 12:31   ` Mylène Josserand
2018-05-01 12:31 ` [PATCH v8 05/12] ARM: dts: sun8i: a83t: Add CCI-400 node Mylène Josserand
2018-05-01 12:31   ` Mylène Josserand
2018-05-01 12:31 ` [PATCH v8 06/12] ARM: smp: Add initialization of CNTVOFF Mylène Josserand
2018-05-01 12:31   ` Mylène Josserand
2018-05-01 12:31 ` [PATCH v8 07/12] ARM: sunxi: " Mylène Josserand
2018-05-01 12:31   ` Mylène Josserand
2018-05-02 13:08   ` Maxime Ripard
2018-05-02 13:08     ` Maxime Ripard
2018-05-02 13:28     ` Mylène Josserand
2018-05-02 13:28       ` Mylène Josserand
2018-05-01 12:31 ` [PATCH v8 08/12] ARM: sun9i: smp: Rename clusters's power-off Mylène Josserand
2018-05-01 12:31   ` Mylène Josserand
2018-05-01 12:31 ` [PATCH v8 09/12] ARM: sun9i: smp: Add is_a83t field Mylène Josserand
2018-05-01 12:31   ` Mylène Josserand
2018-05-02 13:09   ` Maxime Ripard
2018-05-02 13:09     ` Maxime Ripard
2018-05-01 12:31 ` [PATCH v8 10/12] ARM: sun8i: smp: Add support for A83T Mylène Josserand
2018-05-01 12:31   ` Mylène Josserand
2018-05-02 13:14   ` Maxime Ripard
2018-05-02 13:14     ` Maxime Ripard
2018-05-01 12:31 ` [PATCH v8 11/12] ARM: dts: sun8i: Add enable-method for SMP support for the A83T SoC Mylène Josserand
2018-05-01 12:31   ` Mylène Josserand
2018-05-01 12:31 ` [PATCH v8 12/12] ARM: shmobile: Convert file to use cntvoff Mylène Josserand
2018-05-01 12:31   ` Mylène Josserand
2018-05-02  6:36   ` Simon Horman
2018-05-02  6:36     ` Simon Horman
2018-05-02 13:18     ` Maxime Ripard
2018-05-02 13:18       ` Maxime Ripard

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