diff options
Diffstat (limited to 'arch/x86/kernel/trampoline.c')
-rw-r--r-- | arch/x86/kernel/trampoline.c | 42 |
1 files changed, 0 insertions, 42 deletions
diff --git a/arch/x86/kernel/trampoline.c b/arch/x86/kernel/trampoline.c deleted file mode 100644 index a73b61055ad6..000000000000 --- a/arch/x86/kernel/trampoline.c +++ /dev/null | |||
@@ -1,42 +0,0 @@ | |||
1 | #include <linux/io.h> | ||
2 | #include <linux/memblock.h> | ||
3 | |||
4 | #include <asm/trampoline.h> | ||
5 | #include <asm/cacheflush.h> | ||
6 | #include <asm/pgtable.h> | ||
7 | |||
8 | unsigned char *x86_trampoline_base; | ||
9 | |||
10 | void __init setup_trampolines(void) | ||
11 | { | ||
12 | phys_addr_t mem; | ||
13 | size_t size = PAGE_ALIGN(x86_trampoline_end - x86_trampoline_start); | ||
14 | |||
15 | /* Has to be in very low memory so we can execute real-mode AP code. */ | ||
16 | mem = memblock_find_in_range(0, 1<<20, size, PAGE_SIZE); | ||
17 | if (!mem) | ||
18 | panic("Cannot allocate trampoline\n"); | ||
19 | |||
20 | x86_trampoline_base = __va(mem); | ||
21 | memblock_reserve(mem, size); | ||
22 | |||
23 | printk(KERN_DEBUG "Base memory trampoline at [%p] %llx size %zu\n", | ||
24 | x86_trampoline_base, (unsigned long long)mem, size); | ||
25 | |||
26 | memcpy(x86_trampoline_base, x86_trampoline_start, size); | ||
27 | } | ||
28 | |||
29 | /* | ||
30 | * setup_trampolines() gets called very early, to guarantee the | ||
31 | * availability of low memory. This is before the proper kernel page | ||
32 | * tables are set up, so we cannot set page permissions in that | ||
33 | * function. Thus, we use an arch_initcall instead. | ||
34 | */ | ||
35 | static int __init configure_trampolines(void) | ||
36 | { | ||
37 | size_t size = PAGE_ALIGN(x86_trampoline_end - x86_trampoline_start); | ||
38 | |||
39 | set_memory_x((unsigned long)x86_trampoline_base, size >> PAGE_SHIFT); | ||
40 | return 0; | ||
41 | } | ||
42 | arch_initcall(configure_trampolines); | ||