diff options
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/include/asm/realmode.h | 3 | ||||
| -rw-r--r-- | arch/x86/kernel/setup.c | 4 | ||||
| -rw-r--r-- | arch/x86/realmode/init.c | 32 |
3 files changed, 25 insertions, 14 deletions
diff --git a/arch/x86/include/asm/realmode.h b/arch/x86/include/asm/realmode.h index fe1ec5b..9c6b890 100644 --- a/arch/x86/include/asm/realmode.h +++ b/arch/x86/include/asm/realmode.h @@ -58,6 +58,7 @@ extern unsigned char boot_gdt[]; extern unsigned char secondary_startup_64[]; #endif -extern void __init setup_real_mode(void); +void reserve_real_mode(void); +void setup_real_mode(void); #endif /* _ARCH_X86_REALMODE_H */ diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c index 5552d04..85a8290 100644 --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c @@ -999,12 +999,14 @@ void __init setup_arch(char **cmdline_p) printk(KERN_DEBUG "initial memory mapped: [mem 0x00000000-%#010lx]\n", (max_pfn_mapped<<PAGE_SHIFT) - 1); - setup_real_mode(); + reserve_real_mode(); trim_platform_memory_ranges(); init_mem_mapping(); + setup_real_mode(); + memblock.current_limit = get_max_mapped(); dma_contiguous_reserve(0); diff --git a/arch/x86/realmode/init.c b/arch/x86/realmode/init.c index ffee06a..4b5bdc8 100644 --- a/arch/x86/realmode/init.c +++ b/arch/x86/realmode/init.c @@ -8,9 +8,26 @@ struct real_mode_header *real_mode_header; u32 *trampoline_cr4_features; -void __init setup_real_mode(void) +void __init reserve_real_mode(void) { phys_addr_t mem; + unsigned char *base; + size_t size = PAGE_ALIGN(real_mode_blob_end - real_mode_blob); + + /* Has to be under 1M so we can execute real-mode AP code. */ + mem = memblock_find_in_range(0, 1<<20, size, PAGE_SIZE); + if (!mem) + panic("Cannot allocate trampoline\n"); + + base = __va(mem); + memblock_reserve(mem, size); + real_mode_header = (struct real_mode_header *) base; + printk(KERN_DEBUG "Base memory trampoline at [%p] %llx size %zu\n", + base, (unsigned long long)mem, size); +} + +void __init setup_real_mode(void) +{ u16 real_mode_seg; u32 *rel; u32 count; @@ -25,16 +42,7 @@ void __init setup_real_mode(void) u64 efer; #endif - /* Has to be in very low memory so we can execute real-mode AP code. */ - mem = memblock_find_in_range(0, 1<<20, size, PAGE_SIZE); - if (!mem) - panic("Cannot allocate trampoline\n"); - - base = __va(mem); - memblock_reserve(mem, size); - real_mode_header = (struct real_mode_header *) base; - printk(KERN_DEBUG "Base memory trampoline at [%p] %llx size %zu\n", - base, (unsigned long long)mem, size); + base = (unsigned char *)real_mode_header; memcpy(base, real_mode_blob, size); @@ -84,7 +92,7 @@ void __init setup_real_mode(void) } /* - * setup_real_mode() gets called very early, to guarantee the + * reserve_real_mode() gets called very early, to guarantee the * availability of low memory. This is before the proper kernel page * tables are set up, so we cannot set page permissions in that * function. Also trampoline code will be executed by APs so we |