Commit | Line | Data |
---|---|---|
77ad386e | 1 | #include <linux/io.h> |
a9ce6bc1 | 2 | #include <linux/memblock.h> |
77ad386e IM |
3 | |
4 | #include <asm/trampoline.h> | |
fd89a137 | 5 | #include <asm/pgtable.h> |
77ad386e | 6 | |
7a4b7e5e JB |
7 | #if defined(CONFIG_X86_64) && defined(CONFIG_ACPI_SLEEP) |
8 | #define __trampinit | |
9 | #define __trampinitdata | |
10 | #else | |
11 | #define __trampinit __cpuinit | |
12 | #define __trampinitdata __cpuinitdata | |
13 | #endif | |
14 | ||
a4c81cf6 | 15 | /* ready for x86_64 and x86 */ |
893f38d1 | 16 | unsigned char *__trampinitdata trampoline_base; |
77ad386e | 17 | |
3e1e9002 RW |
18 | void __init reserve_trampoline_memory(void) |
19 | { | |
a9ce6bc1 | 20 | phys_addr_t mem; |
893f38d1 | 21 | |
3e1e9002 | 22 | /* Has to be in very low memory so we can execute real-mode AP code. */ |
a9ce6bc1 YL |
23 | mem = memblock_find_in_range(0, 1<<20, TRAMPOLINE_SIZE, PAGE_SIZE); |
24 | if (mem == MEMBLOCK_ERROR) | |
893f38d1 YL |
25 | panic("Cannot allocate trampoline\n"); |
26 | ||
27 | trampoline_base = __va(mem); | |
a9ce6bc1 | 28 | memblock_x86_reserve_range(mem, mem + TRAMPOLINE_SIZE, "TRAMPOLINE"); |
3e1e9002 RW |
29 | } |
30 | ||
77ad386e IM |
31 | /* |
32 | * Currently trivial. Write the real->protected mode | |
33 | * bootstrap into the page concerned. The caller | |
34 | * has made sure it's suitably aligned. | |
35 | */ | |
7a4b7e5e | 36 | unsigned long __trampinit setup_trampoline(void) |
77ad386e | 37 | { |
3e1e9002 | 38 | memcpy(trampoline_base, trampoline_data, TRAMPOLINE_SIZE); |
77ad386e IM |
39 | return virt_to_phys(trampoline_base); |
40 | } | |
fd89a137 JR |
41 | |
42 | void __init setup_trampoline_page_table(void) | |
43 | { | |
44 | #ifdef CONFIG_X86_32 | |
45 | /* Copy kernel address range */ | |
46 | clone_pgd_range(trampoline_pg_dir + KERNEL_PGD_BOUNDARY, | |
47 | swapper_pg_dir + KERNEL_PGD_BOUNDARY, | |
b7d46089 | 48 | KERNEL_PGD_PTRS); |
fd89a137 JR |
49 | |
50 | /* Initialize low mappings */ | |
51 | clone_pgd_range(trampoline_pg_dir, | |
52 | swapper_pg_dir + KERNEL_PGD_BOUNDARY, | |
53 | min_t(unsigned long, KERNEL_PGD_PTRS, | |
54 | KERNEL_PGD_BOUNDARY)); | |
55 | #endif | |
56 | } |