3 #include <asm/trampoline.h>
6 #if defined(CONFIG_X86_64) && defined(CONFIG_ACPI_SLEEP)
8 #define __trampinitdata
10 #define __trampinit __cpuinit
11 #define __trampinitdata __cpuinitdata
14 /* ready for x86_64 and x86 */
15 unsigned char *__trampinitdata trampoline_base;
17 void __init reserve_trampoline_memory(void)
21 /* Has to be in very low memory so we can execute real-mode AP code. */
22 mem = find_e820_area(0, 1<<20, TRAMPOLINE_SIZE, PAGE_SIZE);
24 panic("Cannot allocate trampoline\n");
26 trampoline_base = __va(mem);
27 reserve_early(mem, mem + TRAMPOLINE_SIZE, "TRAMPOLINE");
31 * Currently trivial. Write the real->protected mode
32 * bootstrap into the page concerned. The caller
33 * has made sure it's suitably aligned.
35 unsigned long __trampinit setup_trampoline(void)
37 memcpy(trampoline_base, trampoline_data, TRAMPOLINE_SIZE);
38 return virt_to_phys(trampoline_base);