diff options
| author | Simon Glass <sjg@chromium.org> | 2014-11-14 20:56:29 -0700 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2014-11-25 06:34:14 -0700 |
| commit | e34aef1de36893250a788a272b6242e46da31b86 (patch) | |
| tree | fd0dd027502cc1cf79376e59a8463b3e2ecce229 /arch/x86/cpu/cpu.c | |
| parent | 176bf4ce0cb8ddf380f116860951641c4a700271 (diff) | |
x86: Add GDT descriptors for option ROMs
Option ROMs require a few additional descriptors. Add these, and remove the
enum since we now have to access several descriptors from assembler.
Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'arch/x86/cpu/cpu.c')
| -rw-r--r-- | arch/x86/cpu/cpu.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/arch/x86/cpu/cpu.c b/arch/x86/cpu/cpu.c index cf421faf66..30e5069698 100644 --- a/arch/x86/cpu/cpu.c +++ b/arch/x86/cpu/cpu.c @@ -124,7 +124,7 @@ static void load_gdt(const u64 *boot_gdt, u16 num_entries) { struct gdt_ptr gdt; - gdt.len = (num_entries * 8) - 1; + gdt.len = (num_entries * X86_GDT_ENTRY_SIZE) - 1; gdt.ptr = (u32)boot_gdt; asm volatile("lgdtl %0\n" : : "m" (gdt)); @@ -144,10 +144,13 @@ void setup_gdt(gd_t *id, u64 *gdt_addr) (ulong)&id->arch.gd_addr, 0xfffff); /* 16-bit CS: code, read/execute, 64 kB, base 0 */ - gdt_addr[X86_GDT_ENTRY_16BIT_CS] = GDT_ENTRY(0x109b, 0, 0x0ffff); + gdt_addr[X86_GDT_ENTRY_16BIT_CS] = GDT_ENTRY(0x009b, 0, 0x0ffff); /* 16-bit DS: data, read/write, 64 kB, base 0 */ - gdt_addr[X86_GDT_ENTRY_16BIT_DS] = GDT_ENTRY(0x1093, 0, 0x0ffff); + gdt_addr[X86_GDT_ENTRY_16BIT_DS] = GDT_ENTRY(0x0093, 0, 0x0ffff); + + gdt_addr[X86_GDT_ENTRY_16BIT_FLAT_CS] = GDT_ENTRY(0x809b, 0, 0xfffff); + gdt_addr[X86_GDT_ENTRY_16BIT_FLAT_DS] = GDT_ENTRY(0x8093, 0, 0xfffff); load_gdt(gdt_addr, X86_GDT_NUM_ENTRIES); load_ds(X86_GDT_ENTRY_32BIT_DS); |