linux_dsm_epyc7002/arch/x86/include/asm/trampoline.h
H. Peter Anvin d1ee433539 x86, trampoline: Use the unified trampoline setup for ACPI wakeup
Use the unified trampoline allocation setup to allocate and install
the ACPI wakeup code in low memory.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
LKML-Reference: <4D5DFBE4.7090104@intel.com>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Matthieu Castet <castet.matthieu@free.fr>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
2011-02-17 21:05:06 -08:00

40 lines
1.0 KiB
C

#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 */