| Message ID | 1430174911-27538-14-git-send-email-sjg@chromium.org |
|---|---|
| State | Superseded |
| Delegated to: | Simon Glass |
| Headers | show |
On Tue, Apr 28, 2015 at 6:48 AM, Simon Glass <sjg@chromium.org> wrote: > When we start up additional CPUs we want them to use the same Global > Descriptor Table. Store the address of this in global_data so we can > reference it later. > > Signed-off-by: Simon Glass <sjg@chromium.org> > --- > > arch/x86/cpu/cpu.c | 1 + > arch/x86/include/asm/global_data.h | 1 + > 2 files changed, 2 insertions(+) > > diff --git a/arch/x86/cpu/cpu.c b/arch/x86/cpu/cpu.c > index 13b3baa..74bfed2 100644 > --- a/arch/x86/cpu/cpu.c > +++ b/arch/x86/cpu/cpu.c > @@ -133,6 +133,7 @@ static void load_gdt(const u64 *boot_gdt, u16 num_entries) > > void setup_gdt(gd_t *id, u64 *gdt_addr) > { > + id->arch.gdt = gdt_addr; > /* CS: code, read/execute, 4 GB, base 0 */ > gdt_addr[X86_GDT_ENTRY_32BIT_CS] = GDT_ENTRY(0xc09b, 0, 0xfffff); > > diff --git a/arch/x86/include/asm/global_data.h b/arch/x86/include/asm/global_data.h > index 5ee06eb..4d9eac6 100644 > --- a/arch/x86/include/asm/global_data.h > +++ b/arch/x86/include/asm/global_data.h > @@ -68,6 +68,7 @@ struct arch_global_data { > /* MRC training data to save for the next boot */ > char *mrc_output; > unsigned int mrc_output_len; > + void *gdt; /* Global descriptor table */ > }; > > #endif > -- Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/arch/x86/cpu/cpu.c b/arch/x86/cpu/cpu.c index 13b3baa..74bfed2 100644 --- a/arch/x86/cpu/cpu.c +++ b/arch/x86/cpu/cpu.c @@ -133,6 +133,7 @@ static void load_gdt(const u64 *boot_gdt, u16 num_entries) void setup_gdt(gd_t *id, u64 *gdt_addr) { + id->arch.gdt = gdt_addr; /* CS: code, read/execute, 4 GB, base 0 */ gdt_addr[X86_GDT_ENTRY_32BIT_CS] = GDT_ENTRY(0xc09b, 0, 0xfffff); diff --git a/arch/x86/include/asm/global_data.h b/arch/x86/include/asm/global_data.h index 5ee06eb..4d9eac6 100644 --- a/arch/x86/include/asm/global_data.h +++ b/arch/x86/include/asm/global_data.h @@ -68,6 +68,7 @@ struct arch_global_data { /* MRC training data to save for the next boot */ char *mrc_output; unsigned int mrc_output_len; + void *gdt; /* Global descriptor table */ }; #endif
When we start up additional CPUs we want them to use the same Global Descriptor Table. Store the address of this in global_data so we can reference it later. Signed-off-by: Simon Glass <sjg@chromium.org> --- arch/x86/cpu/cpu.c | 1 + arch/x86/include/asm/global_data.h | 1 + 2 files changed, 2 insertions(+)