[net-next-2.6.git] / arch / x86 / kernel / trampoline.c

#include <linux/io.h>

#include <asm/trampoline.h>
#include <asm/e820.h>

#if defined(CONFIG_X86_64) && defined(CONFIG_ACPI_SLEEP)
#define __trampinit
#define __trampinitdata
#else
#define __trampinit __cpuinit
#define __trampinitdata __cpuinitdata
#endif

/* ready for x86_64 and x86 */
unsigned char *__trampinitdata trampoline_base = __va(TRAMPOLINE_BASE);

void __init reserve_trampoline_memory(void)
{
#ifdef CONFIG_X86_32
	/*
	 * But first pinch a few for the stack/trampoline stuff
	 * FIXME: Don't need the extra page at 4K, but need to fix
	 * trampoline before removing it. (see the GDT stuff)
	 */
	reserve_early(PAGE_SIZE, PAGE_SIZE + PAGE_SIZE, "EX TRAMPOLINE");
#endif
	/* Has to be in very low memory so we can execute real-mode AP code. */
	reserve_early(TRAMPOLINE_BASE, TRAMPOLINE_BASE + TRAMPOLINE_SIZE,
			"TRAMPOLINE");
}

/*
 * Currently trivial. Write the real->protected mode
 * bootstrap into the page concerned. The caller
 * has made sure it's suitably aligned.
 */
unsigned long __trampinit setup_trampoline(void)
{
	memcpy(trampoline_base, trampoline_data, TRAMPOLINE_SIZE);
	return virt_to_phys(trampoline_base);
}
Commit	Line	Data
77ad386e IM	1	#include <linux/io.h>
	2
	3	#include <asm/trampoline.h>
3e1e9002	4	#include <asm/e820.h>
77ad386e	5
7a4b7e5e JB	6	#if defined(CONFIG_X86_64) && defined(CONFIG_ACPI_SLEEP)
	7	#define __trampinit
	8	#define __trampinitdata
	9	#else
	10	#define __trampinit __cpuinit
	11	#define __trampinitdata __cpuinitdata
	12	#endif
	13
a4c81cf6	14	/* ready for x86_64 and x86 */
7a4b7e5e	15	unsigned char *__trampinitdata trampoline_base = __va(TRAMPOLINE_BASE);
77ad386e	16
3e1e9002 RW	17	void __init reserve_trampoline_memory(void)
	18	{
	19	#ifdef CONFIG_X86_32
	20	/*
	21	* But first pinch a few for the stack/trampoline stuff
	22	* FIXME: Don't need the extra page at 4K, but need to fix
	23	* trampoline before removing it. (see the GDT stuff)
	24	*/
	25	reserve_early(PAGE_SIZE, PAGE_SIZE + PAGE_SIZE, "EX TRAMPOLINE");
	26	#endif
	27	/* Has to be in very low memory so we can execute real-mode AP code. */
	28	reserve_early(TRAMPOLINE_BASE, TRAMPOLINE_BASE + TRAMPOLINE_SIZE,
	29	"TRAMPOLINE");
	30	}
	31
77ad386e IM	32	/*
	33	* Currently trivial. Write the real->protected mode
	34	* bootstrap into the page concerned. The caller
	35	* has made sure it's suitably aligned.
	36	*/
7a4b7e5e	37	unsigned long __trampinit setup_trampoline(void)
77ad386e	38	{
3e1e9002	39	memcpy(trampoline_base, trampoline_data, TRAMPOLINE_SIZE);
77ad386e IM	40	return virt_to_phys(trampoline_base);
77ad386e IM	41	}