diff options
| author | Simon Glass <sjg@chromium.org> | 2012-12-13 20:48:42 +0000 |
|---|---|---|
| committer | Tom Rini <trini@ti.com> | 2013-02-01 15:36:53 -0500 |
| commit | 0cecc3b67938147bc9b9dfe55a8464b4dd4092de (patch) | |
| tree | 5b112ad73ac1b4b8bd6def5ea7df1e28dfec1aec /arch/x86/cpu/cpu.c | |
| parent | df4aa625a2a6dbc3151ca7aa5e0656f281416cfe (diff) | |
x86: Set up the global data pointer in C instead of asm
We currently assume that the global data pointer is at the start of
struct global_data. We want to remove this restriction, and it is
easiest to do this in C.
Remove the asm code and add equivalent code in C.
This idea was proposed by Graeme Russ here:
http://patchwork.ozlabs.org/patch/199741/
Signed-off-by: Simon Glass <sjg@chromium.org>
[trini: Apply Graeme Russ' comments
http://patchwork.ozlabs.org/patch/206305/ here, re-order]
Signed-off-by: Tom Rini <trini@ti.com>
Diffstat (limited to 'arch/x86/cpu/cpu.c')
| -rw-r--r-- | arch/x86/cpu/cpu.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/x86/cpu/cpu.c b/arch/x86/cpu/cpu.c index 315e87afeb2..4902f8bccc6 100644 --- a/arch/x86/cpu/cpu.c +++ b/arch/x86/cpu/cpu.c @@ -100,7 +100,9 @@ void setup_gdt(gd_t *id, u64 *gdt_addr) gdt_addr[X86_GDT_ENTRY_32BIT_DS] = GDT_ENTRY(0xc093, 0, 0xfffff); /* FS: data, read/write, 4 GB, base (Global Data Pointer) */ - gdt_addr[X86_GDT_ENTRY_32BIT_FS] = GDT_ENTRY(0xc093, (ulong)id, 0xfffff); + id->gd_addr = id; + gdt_addr[X86_GDT_ENTRY_32BIT_FS] = GDT_ENTRY(0xc093, + (ulong)&id->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); |