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x86: Add processor functions to halt and get stack pointer

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Add a function to get the stack pointer and another to halt the CPU.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass 2014-11-10 18:00:24 -07:00
parent 880a3cc438
commit 21b9b14b49
1 changed files with 19 additions and 0 deletions
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19
arch/x86/include/asm/processor.h
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@ -30,4 +30,23 @@ enum {
#define X86_GDT_SIZE (X86_GDT_NUM_ENTRIES * X86_GDT_ENTRY_SIZE)
#ifndef __ASSEMBLY__
static inline __attribute__((always_inline)) void cpu_hlt(void)
{
asm("hlt");
}
static inline ulong cpu_get_sp(void)
{
ulong result;
asm volatile(
"mov %%esp, %%eax"
: "=a" (result));
return result;
}
#endif /* __ASSEMBLY__ */
#endif