]>
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 */ |
893f38d1 | 15 | unsigned char *__trampinitdata trampoline_base; |
77ad386e | 16 | |
3e1e9002 RW |
17 | void __init reserve_trampoline_memory(void) |
18 | { | |
893f38d1 YL |
19 | unsigned long mem; |
20 | ||
3e1e9002 | 21 | /* Has to be in very low memory so we can execute real-mode AP code. */ |
893f38d1 YL |
22 | mem = find_e820_area(0, 1<<20, TRAMPOLINE_SIZE, PAGE_SIZE); |
23 | if (mem == -1L) | |
24 | panic("Cannot allocate trampoline\n"); | |
25 | ||
26 | trampoline_base = __va(mem); | |
27 | reserve_early(mem, mem + TRAMPOLINE_SIZE, "TRAMPOLINE"); | |
3e1e9002 RW |
28 | } |
29 | ||
77ad386e IM |
30 | /* |
31 | * Currently trivial. Write the real->protected mode | |
32 | * bootstrap into the page concerned. The caller | |
33 | * has made sure it's suitably aligned. | |
34 | */ | |
7a4b7e5e | 35 | unsigned long __trampinit setup_trampoline(void) |
77ad386e | 36 | { |
3e1e9002 | 37 | memcpy(trampoline_base, trampoline_data, TRAMPOLINE_SIZE); |
77ad386e IM |
38 | return virt_to_phys(trampoline_base); |
39 | } |