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| author | Jonathan Austin <Jonathan.Austin@arm.com> | 2012-04-12 18:52:10 +0200 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2012-04-25 20:49:26 +0200 |
| commit | 58834eecdeaab191b7c07a5eba8fdf9b637156e8 (patch) | |
| tree | 1f12c3157e9f07885eb30f5a61b33b71876cb596 /arch/arm/kernel/thumbee.c | |
| parent | ARM: 7395/1: VIC: use the domain mapping function to assign handlers (diff) | |
| download | linux-58834eecdeaab191b7c07a5eba8fdf9b637156e8.tar.xz linux-58834eecdeaab191b7c07a5eba8fdf9b637156e8.zip | |
ARM: 7385/1: ThumbEE: Use cpuid macros to read ID_PFR0 for ThumbEE
The ThumbEE probe code uses inline assembly to read ID_PFR0 in order to
detect whether ThumbEE is implemented by the processor.
This patch replaces the inline asm with the read_cpuid_ext macro.
Reviewed-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Jonathan Austin <jonathan.austin@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/kernel/thumbee.c')
| -rw-r--r-- | arch/arm/kernel/thumbee.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/arm/kernel/thumbee.c b/arch/arm/kernel/thumbee.c index aab899764053..7b8403b76666 100644 --- a/arch/arm/kernel/thumbee.c +++ b/arch/arm/kernel/thumbee.c @@ -20,6 +20,7 @@ #include <linux/kernel.h> #include <linux/init.h> +#include <asm/cputype.h> #include <asm/system_info.h> #include <asm/thread_notify.h> @@ -67,8 +68,7 @@ static int __init thumbee_init(void) if (cpu_arch < CPU_ARCH_ARMv7) return 0; - /* processor feature register 0 */ - asm("mrc p15, 0, %0, c0, c1, 0\n" : "=r" (pfr0)); + pfr0 = read_cpuid_ext(CPUID_EXT_PFR0); if ((pfr0 & 0x0000f000) != 0x00001000) return 0; |