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Diffstat (limited to 'arch/x86/include/asm/trampoline.h')
| -rw-r--r-- | arch/x86/include/asm/trampoline.h | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/arch/x86/include/asm/trampoline.h b/arch/x86/include/asm/trampoline.h new file mode 100644 index 00000000..feca3118 --- /dev/null +++ b/arch/x86/include/asm/trampoline.h @@ -0,0 +1,39 @@ +#ifndef _ASM_X86_TRAMPOLINE_H +#define _ASM_X86_TRAMPOLINE_H + +#ifndef __ASSEMBLY__ + +#include <linux/types.h> +#include <asm/io.h> + +/* + * Trampoline 80x86 program as an array. These are in the init rodata + * segment, but that's okay, because we only care about the relative + * addresses of the symbols. + */ +extern const unsigned char x86_trampoline_start []; +extern const unsigned char x86_trampoline_end []; +extern unsigned char *x86_trampoline_base; + +extern unsigned long init_rsp; +extern unsigned long initial_code; +extern unsigned long initial_gs; + +extern void __init setup_trampolines(void); + +extern const unsigned char trampoline_data[]; +extern const unsigned char trampoline_status[]; + +#define TRAMPOLINE_SYM(x) \ + ((void *)(x86_trampoline_base + \ + ((const unsigned char *)(x) - x86_trampoline_start))) + +/* Address of the SMP trampoline */ +static inline unsigned long trampoline_address(void) +{ + return virt_to_phys(TRAMPOLINE_SYM(trampoline_data)); +} + +#endif /* __ASSEMBLY__ */ + +#endif /* _ASM_X86_TRAMPOLINE_H */ |