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| author |   Sergio Luis <sergio@larces.uece.br> | 2009-04-28 00:27:00 +0200 |
|---|---|---|
| committer |   Rafael J. Wysocki <rjw@sisk.pl> | 2009-06-12 21:32:30 +0200 |
| commit | f9ebbe53e79c5978d0e8ead0843a3717b41ad3d5 (patch) | |
| tree | bceb57f37200a72cbca2ffd15881306fecffd649 /arch/x86/power/cpu_64.c | |
| parent | x86: unify power/cpu_(32|64) global variables (diff) | |
| download | linux-dev-f9ebbe53e79c5978d0e8ead0843a3717b41ad3d5.tar.xz linux-dev-f9ebbe53e79c5978d0e8ead0843a3717b41ad3d5.zip | |
x86: unify power/cpu_(32|64) regarding saving processor state
In this step we do unify cpu_32.c and cpu_64.c functions that
work on saving the processor state.
Signed-off-by: Sergio Luis <sergio@larces.uece.br>
Signed-off-by: Lauro Salmito <laurosalmito@gmail.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Diffstat (limited to 'arch/x86/power/cpu_64.c')
| -rw-r--r-- | arch/x86/power/cpu_64.c | 29 |
1 files changed, 28 insertions, 1 deletions
diff --git a/arch/x86/power/cpu_64.c b/arch/x86/power/cpu_64.c index 6ce0eca847c3..11ea7d0ba5d9 100644 --- a/arch/x86/power/cpu_64.c +++ b/arch/x86/power/cpu_64.c @@ -50,19 +50,35 @@ struct saved_context saved_context; */ static void __save_processor_state(struct saved_context *ctxt) { +#ifdef CONFIG_X86_32 + mtrr_save_fixed_ranges(NULL); +#endif kernel_fpu_begin(); /* * descriptor tables */ +#ifdef CONFIG_X86_32 + store_gdt(&ctxt->gdt); + store_idt(&ctxt->idt); +#else +/* CONFIG_X86_64 */ store_gdt((struct desc_ptr *)&ctxt->gdt_limit); store_idt((struct desc_ptr *)&ctxt->idt_limit); +#endif store_tr(ctxt->tr); /* XMM0..XMM15 should be handled by kernel_fpu_begin(). */ /* * segment registers */ +#ifdef CONFIG_X86_32 + savesegment(es, ctxt->es); + savesegment(fs, ctxt->fs); + savesegment(gs, ctxt->gs); + savesegment(ss, ctxt->ss); +#else +/* CONFIG_X86_64 */ asm volatile ("movw %%ds, %0" : "=m" (ctxt->ds)); asm volatile ("movw %%es, %0" : "=m" (ctxt->es)); asm volatile ("movw %%fs, %0" : "=m" (ctxt->fs)); @@ -74,21 +90,32 @@ static void __save_processor_state(struct saved_context *ctxt) rdmsrl(MSR_KERNEL_GS_BASE, ctxt->gs_kernel_base); mtrr_save_fixed_ranges(NULL); + rdmsrl(MSR_EFER, ctxt->efer); +#endif + /* * control registers */ - rdmsrl(MSR_EFER, ctxt->efer); ctxt->cr0 = read_cr0(); ctxt->cr2 = read_cr2(); ctxt->cr3 = read_cr3(); +#ifdef CONFIG_X86_32 + ctxt->cr4 = read_cr4_safe(); +#else +/* CONFIG_X86_64 */ ctxt->cr4 = read_cr4(); ctxt->cr8 = read_cr8(); +#endif } +/* Needed by apm.c */ void save_processor_state(void) { __save_processor_state(&saved_context); } +#ifdef CONFIG_X86_32 +EXPORT_SYMBOL(save_processor_state); +#endif static void do_fpu_end(void) { |