3 #include <asm/trampoline.h>
4 #include <asm/pgtable.h>
7 #if defined(CONFIG_X86_64) && defined(CONFIG_ACPI_SLEEP)
9 #define __trampinitdata
11 #define __trampinit __cpuinit
12 #define __trampinitdata __cpuinitdata
15 /* ready for x86_64 and x86 */
16 unsigned char *__trampinitdata trampoline_base;
18 void __init reserve_trampoline_memory(void)
22 /* Has to be in very low memory so we can execute real-mode AP code. */
23 mem = find_e820_area(0, 1<<20, TRAMPOLINE_SIZE, PAGE_SIZE);
25 panic("Cannot allocate trampoline\n");
27 trampoline_base = __va(mem);
28 reserve_early(mem, mem + TRAMPOLINE_SIZE, "TRAMPOLINE");
32 * Currently trivial. Write the real->protected mode
33 * bootstrap into the page concerned. The caller
34 * has made sure it's suitably aligned.
36 unsigned long __trampinit setup_trampoline(void)
38 memcpy(trampoline_base, trampoline_data, TRAMPOLINE_SIZE);
39 return virt_to_phys(trampoline_base);
42 void __init setup_trampoline_page_table(void)
45 /* Copy kernel address range */
46 clone_pgd_range(trampoline_pg_dir + KERNEL_PGD_BOUNDARY,
47 swapper_pg_dir + KERNEL_PGD_BOUNDARY,
48 min_t(unsigned long, KERNEL_PGD_PTRS,
49 KERNEL_PGD_BOUNDARY));
51 /* Initialize low mappings */
52 clone_pgd_range(trampoline_pg_dir,
53 swapper_pg_dir + KERNEL_PGD_BOUNDARY,
54 min_t(unsigned long, KERNEL_PGD_PTRS,
55 KERNEL_PGD_BOUNDARY));