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author | Dave Martin <dave.martin@linaro.org> | 2011-08-19 16:58:35 (GMT) |
---|---|---|
committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2011-10-17 08:12:40 (GMT) |
commit | 2ecccf90f2a6d821af4d33f086d59895e5d3bedc (patch) | |
tree | d12438e595a0cfa5051187f69a1badddb1b317b3 /arch/arm/kernel/setup.c | |
parent | 40c6d8aee40e373db75e6b0b4230fc8e8259d7a6 (diff) | |
download | linux-fsl-qoriq-2ecccf90f2a6d821af4d33f086d59895e5d3bedc.tar.xz |
ARM: 7029/1: Make cpu_architecture into a global variable
The CPU architecture really should not be changing at runtime, so
make it a global variable instead of a function.
The cpu_architecture() function declared in <asm/system.h> remains
the correct way to read this variable from C code.
Signed-off-by: Dave Martin <dave.martin@linaro.org>
Reviewed-by: Jon Medhurst <tixy@yxit.co.uk>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/kernel/setup.c')
-rw-r--r-- | arch/arm/kernel/setup.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c index e514c76..10fce61 100644 --- a/arch/arm/kernel/setup.c +++ b/arch/arm/kernel/setup.c @@ -29,6 +29,8 @@ #include <linux/fs.h> #include <linux/proc_fs.h> #include <linux/memblock.h> +#include <linux/bug.h> +#include <linux/compiler.h> #include <asm/unified.h> #include <asm/cpu.h> @@ -42,6 +44,7 @@ #include <asm/cacheflush.h> #include <asm/cachetype.h> #include <asm/tlbflush.h> +#include <asm/system.h> #include <asm/prom.h> #include <asm/mach/arch.h> @@ -115,6 +118,13 @@ struct outer_cache_fns outer_cache __read_mostly; EXPORT_SYMBOL(outer_cache); #endif +/* + * Cached cpu_architecture() result for use by assembler code. + * C code should use the cpu_architecture() function instead of accessing this + * variable directly. + */ +int __cpu_architecture __read_mostly = CPU_ARCH_UNKNOWN; + struct stack { u32 irq[3]; u32 abt[3]; @@ -210,7 +220,7 @@ static const char *proc_arch[] = { "?(17)", }; -int cpu_architecture(void) +static int __get_cpu_architecture(void) { int cpu_arch; @@ -243,6 +253,13 @@ int cpu_architecture(void) return cpu_arch; } +int __pure cpu_architecture(void) +{ + BUG_ON(__cpu_architecture == CPU_ARCH_UNKNOWN); + + return __cpu_architecture; +} + static int cpu_has_aliasing_icache(unsigned int arch) { int aliasing_icache; @@ -414,6 +431,7 @@ static void __init setup_processor(void) } cpu_name = list->cpu_name; + __cpu_architecture = __get_cpu_architecture(); #ifdef MULTI_CPU processor = *list->proc; |