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ARM: sunxi: smp: Move assembly code into a file 

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>
Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
This commit is contained in:
Mylène Josserand 2018-05-04 21:05:35 +02:00 коммит произвёл Maxime Ripard
Родитель 17e49a9e90
Коммит dff052ccf3
3 изменённых файлов: 85 добавлений и 79 удалений
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2
arch/arm/mach-sunxi/Makefile
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@ -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

80
arch/arm/mach-sunxi/headsmp.S Normal file
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@ -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)

82
arch/arm/mach-sunxi/mc_smp.c
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@ -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;