Commit | Line | Data |
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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 */ |
7a4b7e5e | 15 | unsigned char *__trampinitdata trampoline_base = __va(TRAMPOLINE_BASE); |
77ad386e | 16 | |
3e1e9002 RW |
17 | void __init reserve_trampoline_memory(void) |
18 | { | |
19 | #ifdef CONFIG_X86_32 | |
20 | /* | |
21 | * But first pinch a few for the stack/trampoline stuff | |
22 | * FIXME: Don't need the extra page at 4K, but need to fix | |
23 | * trampoline before removing it. (see the GDT stuff) | |
24 | */ | |
25 | reserve_early(PAGE_SIZE, PAGE_SIZE + PAGE_SIZE, "EX TRAMPOLINE"); | |
26 | #endif | |
27 | /* Has to be in very low memory so we can execute real-mode AP code. */ | |
28 | reserve_early(TRAMPOLINE_BASE, TRAMPOLINE_BASE + TRAMPOLINE_SIZE, | |
29 | "TRAMPOLINE"); | |
30 | } | |
31 | ||
77ad386e IM |
32 | /* |
33 | * Currently trivial. Write the real->protected mode | |
34 | * bootstrap into the page concerned. The caller | |
35 | * has made sure it's suitably aligned. | |
36 | */ | |
7a4b7e5e | 37 | unsigned long __trampinit setup_trampoline(void) |
77ad386e | 38 | { |
3e1e9002 | 39 | memcpy(trampoline_base, trampoline_data, TRAMPOLINE_SIZE); |
77ad386e IM |
40 | return virt_to_phys(trampoline_base); |
41 | } |