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x86, trampoline: Use the unified trampoline setup for ACPI wakeup

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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>
This commit is contained in:
H. Peter Anvin
2011-02-14 15:42:46 -08:00
parent 4822b7fc6d
commit d1ee433539
10 changed files with 69 additions and 108 deletions
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33
arch/x86/include/asm/trampoline.h
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@@ -3,25 +3,36 @@
#ifndef __ASSEMBLY__
#ifdef CONFIG_X86_TRAMPOLINE
#include <linux/types.h>
#include <asm/io.h>
/*
* Trampoline 80x86 program as an array.
* 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 trampoline_data [];
extern const unsigned char trampoline_end [];
extern unsigned char *trampoline_base;
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;
#define TRAMPOLINE_SIZE roundup(trampoline_end - trampoline_data, PAGE_SIZE)
extern void __init setup_trampolines(void);
extern unsigned long setup_trampoline(void);
extern void __init reserve_trampoline_memory(void);
#else
static inline void reserve_trampoline_memory(void) {}
#endif /* CONFIG_X86_TRAMPOLINE */
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__ */