| #include <linux/io.h> |
| |
| #include <asm/trampoline.h> |
| #include <asm/pgtable.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; |
| |
| void __init reserve_trampoline_memory(void) |
| { |
| unsigned long mem; |
| |
| /* Has to be in very low memory so we can execute real-mode AP code. */ |
| mem = find_e820_area(0, 1<<20, TRAMPOLINE_SIZE, PAGE_SIZE); |
| if (mem == -1L) |
| panic("Cannot allocate trampoline\n"); |
| |
| trampoline_base = __va(mem); |
| reserve_early(mem, mem + 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); |
| } |
| |
| void __init setup_trampoline_page_table(void) |
| { |
| #ifdef CONFIG_X86_32 |
| /* Copy kernel address range */ |
| clone_pgd_range(trampoline_pg_dir + KERNEL_PGD_BOUNDARY, |
| swapper_pg_dir + KERNEL_PGD_BOUNDARY, |
| min_t(unsigned long, KERNEL_PGD_PTRS, |
| KERNEL_PGD_BOUNDARY)); |
| |
| /* Initialize low mappings */ |
| clone_pgd_range(trampoline_pg_dir, |
| swapper_pg_dir + KERNEL_PGD_BOUNDARY, |
| min_t(unsigned long, KERNEL_PGD_PTRS, |
| KERNEL_PGD_BOUNDARY)); |
| #endif |
| } |