Commit 58834eec authored by Jonathan Austin's avatar Jonathan Austin Committed by Russell King

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: default avatarWill Deacon <will.deacon@arm.com>
Signed-off-by: default avatarJonathan Austin <jonathan.austin@arm.com>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent ce94df9c
...@@ -20,6 +20,7 @@ ...@@ -20,6 +20,7 @@
#include <linux/kernel.h> #include <linux/kernel.h>
#include <linux/init.h> #include <linux/init.h>
#include <asm/cputype.h>
#include <asm/system_info.h> #include <asm/system_info.h>
#include <asm/thread_notify.h> #include <asm/thread_notify.h>
...@@ -67,8 +68,7 @@ static int __init thumbee_init(void) ...@@ -67,8 +68,7 @@ static int __init thumbee_init(void)
if (cpu_arch < CPU_ARCH_ARMv7) if (cpu_arch < CPU_ARCH_ARMv7)
return 0; return 0;
/* processor feature register 0 */ pfr0 = read_cpuid_ext(CPUID_EXT_PFR0);
asm("mrc p15, 0, %0, c0, c1, 0\n" : "=r" (pfr0));
if ((pfr0 & 0x0000f000) != 0x00001000) if ((pfr0 & 0x0000f000) != 0x00001000)
return 0; return 0;
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment