kernel/suspend_64.c and power/cpu.c were equivalent. Move them into
power/cpu_*.c for consistency.
power/swsusp.S and kernel/suspend_asm_64.S were both misnamed and
equivalent. Merge then minto power/hibernation_*.S.
Signed-off-by: Pavel Machek <pavel@xxxxxxx>
---
commit 2a4fbaecebafff5b3114d0e87ecf73c45bc57f7b
tree a13462c0ae1fa640a9b9d08cfea0bf6056b26385
parent eafb847ccc4f73c2737157b510dcf7b040f53147
author Pavel <pavel@xxxxxxxxxx> Mon, 07 Jan 2008 14:50:25 +0100
committer Pavel <pavel@xxxxxxxxxx> Mon, 07 Jan 2008 14:50:25 +0100
arch/x86/Makefile_64 | 1
arch/x86/kernel/Makefile_64 | 2
arch/x86/kernel/suspend_64.c | 294 --------------------------------------
arch/x86/kernel/suspend_asm_64.S | 141 ------------------
arch/x86/power/Makefile | 10 +
arch/x86/power/cpu.c | 133 -----------------
arch/x86/power/cpu_32.c | 133 +++++++++++++++++
arch/x86/power/cpu_64.c | 294 ++++++++++++++++++++++++++++++++++++++
arch/x86/power/hibernation_32.S | 78 ++++++++++
arch/x86/power/hibernation_64.S | 141 ++++++++++++++++++
arch/x86/power/swsusp.S | 78 ----------
11 files changed, 655 insertions(+), 650 deletions(-)
diff --git a/arch/x86/Makefile_64 b/arch/x86/Makefile_64
index a804860..4938b6b 100644
--- a/arch/x86/Makefile_64
+++ b/arch/x86/Makefile_64
@@ -87,6 +87,7 @@ core-y += arch/x86/kernel/ \
core-$(CONFIG_IA32_EMULATION) += arch/x86/ia32/
drivers-$(CONFIG_PCI) += arch/x86/pci/
drivers-$(CONFIG_OPROFILE) += arch/x86/oprofile/
+drivers-$(CONFIG_PM) += arch/x86/power/
boot := arch/x86/boot
diff --git a/arch/x86/kernel/Makefile_64 b/arch/x86/kernel/Makefile_64
index 5a88890..cc79834 100644
--- a/arch/x86/kernel/Makefile_64
+++ b/arch/x86/kernel/Makefile_64
@@ -24,8 +24,6 @@ obj-y += apic_64.o nmi_64.o
obj-y += io_apic_64.o mpparse_64.o genapic_64.o genapic_flat_64.o
obj-$(CONFIG_KEXEC) += machine_kexec_64.o relocate_kernel_64.o crash.o
obj-$(CONFIG_CRASH_DUMP) += crash_dump_64.o
-obj-$(CONFIG_PM) += suspend_64.o
-obj-$(CONFIG_HIBERNATION) += suspend_asm_64.o
obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
obj-$(CONFIG_GART_IOMMU) += pci-gart_64.o aperture_64.o
obj-$(CONFIG_CALGARY_IOMMU) += pci-calgary_64.o tce_64.o
diff --git a/arch/x86/kernel/suspend_64.c b/arch/x86/kernel/suspend_64.c
deleted file mode 100644
index 2e5efaa..0000000
--- a/arch/x86/kernel/suspend_64.c
+++ /dev/null
@@ -1,294 +0,0 @@
-/*
- * Suspend support specific for i386.
- *
- * Distribute under GPLv2
- *
- * Copyright (c) 2002 Pavel Machek <pavel@xxxxxxx>
- * Copyright (c) 2001 Patrick Mochel <mochel@xxxxxxxx>
- */
-
-#include <linux/smp.h>
-#include <linux/suspend.h>
-#include <asm/proto.h>
-#include <asm/page.h>
-#include <asm/pgtable.h>
-#include <asm/mtrr.h>
-
-/* References to section boundaries */
-extern const void __nosave_begin, __nosave_end;
-
-struct saved_context saved_context;
-
-void __save_processor_state(struct saved_context *ctxt)
-{
- kernel_fpu_begin();
-
- /*
- * descriptor tables
- */
- store_gdt((struct desc_ptr *)&ctxt->gdt_limit);
- store_idt((struct desc_ptr *)&ctxt->idt_limit);
- store_tr(ctxt->tr);
-
- /* XMM0..XMM15 should be handled by kernel_fpu_begin(). */
- /*
- * segment registers
- */
- asm volatile ("movw %%ds, %0" : "=m" (ctxt->ds));
- asm volatile ("movw %%es, %0" : "=m" (ctxt->es));
- asm volatile ("movw %%fs, %0" : "=m" (ctxt->fs));
- asm volatile ("movw %%gs, %0" : "=m" (ctxt->gs));
- asm volatile ("movw %%ss, %0" : "=m" (ctxt->ss));
-
- rdmsrl(MSR_FS_BASE, ctxt->fs_base);
- rdmsrl(MSR_GS_BASE, ctxt->gs_base);
- rdmsrl(MSR_KERNEL_GS_BASE, ctxt->gs_kernel_base);
- mtrr_save_fixed_ranges(NULL);
-
- /*
- * control registers
- */
- rdmsrl(MSR_EFER, ctxt->efer);
- ctxt->cr0 = read_cr0();
- ctxt->cr2 = read_cr2();
- ctxt->cr3 = read_cr3();
- ctxt->cr4 = read_cr4();
- ctxt->cr8 = read_cr8();
-}
-
-void save_processor_state(void)
-{
- __save_processor_state(&saved_context);
-}
-
-static void do_fpu_end(void)
-{
- /*
- * Restore FPU regs if necessary
- */
- kernel_fpu_end();
-}
-
-void __restore_processor_state(struct saved_context *ctxt)
-{
- /*
- * control registers
- */
- wrmsrl(MSR_EFER, ctxt->efer);
- write_cr8(ctxt->cr8);
- write_cr4(ctxt->cr4);
- write_cr3(ctxt->cr3);
- write_cr2(ctxt->cr2);
- write_cr0(ctxt->cr0);
-
- /*
- * now restore the descriptor tables to their proper values
- * ltr is done i fix_processor_context().
- */
- load_gdt((const struct desc_ptr *)&ctxt->gdt_limit);
- load_idt((const struct desc_ptr *)&ctxt->idt_limit);
-
-
- /*
- * segment registers
- */
- asm volatile ("movw %0, %%ds" :: "r" (ctxt->ds));
- asm volatile ("movw %0, %%es" :: "r" (ctxt->es));
- asm volatile ("movw %0, %%fs" :: "r" (ctxt->fs));
- load_gs_index(ctxt->gs);
- asm volatile ("movw %0, %%ss" :: "r" (ctxt->ss));
-
- wrmsrl(MSR_FS_BASE, ctxt->fs_base);
- wrmsrl(MSR_GS_BASE, ctxt->gs_base);
- wrmsrl(MSR_KERNEL_GS_BASE, ctxt->gs_kernel_base);
-
- fix_processor_context();
-
- do_fpu_end();
- mtrr_ap_init();
-}
-
-void restore_processor_state(void)
-{
- __restore_processor_state(&saved_context);
-}
-
-void fix_processor_context(void)
-{
- int cpu = smp_processor_id();
- struct tss_struct *t = &per_cpu(init_tss, cpu);
-
- set_tss_desc(cpu,t); /* This just modifies memory; should not be necessary. But... This is necessary, because 386 hardware has concept of busy TSS or some similar stupidity. */
-
- cpu_gdt(cpu)[GDT_ENTRY_TSS].type = 9;
-
- syscall_init(); /* This sets MSR_*STAR and related */
- load_TR_desc(); /* This does ltr */
- load_LDT(¤t->active_mm->context); /* This does lldt */
-
- /*
- * Now maybe reload the debug registers
- */
- if (current->thread.debugreg7){
- loaddebug(¤t->thread, 0);
- loaddebug(¤t->thread, 1);
- loaddebug(¤t->thread, 2);
- loaddebug(¤t->thread, 3);
- /* no 4 and 5 */
- loaddebug(¤t->thread, 6);
- loaddebug(¤t->thread, 7);
- }
-
-}
-
-#ifdef CONFIG_HIBERNATION
-/* Defined in arch/x86_64/kernel/suspend_asm.S */
-extern int restore_image(void);
-
-/*
- * Address to jump to in the last phase of restore in order to get to the image
- * kernel's text (this value is passed in the image header).
- */
-unsigned long restore_jump_address;
-
-/*
- * Value of the cr3 register from before the hibernation (this value is passed
- * in the image header).
- */
-unsigned long restore_cr3;
-
-pgd_t *temp_level4_pgt;
-
-void *relocated_restore_code;
-
-static int res_phys_pud_init(pud_t *pud, unsigned long address, unsigned long end)
-{
- long i, j;
-
- i = pud_index(address);
- pud = pud + i;
- for (; i < PTRS_PER_PUD; pud++, i++) {
- unsigned long paddr;
- pmd_t *pmd;
-
- paddr = address + i*PUD_SIZE;
- if (paddr >= end)
- break;
-
- pmd = (pmd_t *)get_safe_page(GFP_ATOMIC);
- if (!pmd)
- return -ENOMEM;
- set_pud(pud, __pud(__pa(pmd) | _KERNPG_TABLE));
- for (j = 0; j < PTRS_PER_PMD; pmd++, j++, paddr += PMD_SIZE) {
- unsigned long pe;
-
- if (paddr >= end)
- break;
- pe = __PAGE_KERNEL_LARGE_EXEC | paddr;
- pe &= __supported_pte_mask;
- set_pmd(pmd, __pmd(pe));
- }
- }
- return 0;
-}
-
-static int set_up_temporary_mappings(void)
-{
- unsigned long start, end, next;
- int error;
-
- temp_level4_pgt = (pgd_t *)get_safe_page(GFP_ATOMIC);
- if (!temp_level4_pgt)
- return -ENOMEM;
-
- /* It is safe to reuse the original kernel mapping */
- set_pgd(temp_level4_pgt + pgd_index(__START_KERNEL_map),
- init_level4_pgt[pgd_index(__START_KERNEL_map)]);
-
- /* Set up the direct mapping from scratch */
- start = (unsigned long)pfn_to_kaddr(0);
- end = (unsigned long)pfn_to_kaddr(end_pfn);
-
- for (; start < end; start = next) {
- pud_t *pud = (pud_t *)get_safe_page(GFP_ATOMIC);
- if (!pud)
- return -ENOMEM;
- next = start + PGDIR_SIZE;
- if (next > end)
- next = end;
- if ((error = res_phys_pud_init(pud, __pa(start), __pa(next))))
- return error;
- set_pgd(temp_level4_pgt + pgd_index(start),
- mk_kernel_pgd(__pa(pud)));
- }
- return 0;
-}
-
-int swsusp_arch_resume(void)
-{
- int error;
-
- /* We have got enough memory and from now on we cannot recover */
- if ((error = set_up_temporary_mappings()))
- return error;
-
- relocated_restore_code = (void *)get_safe_page(GFP_ATOMIC);
- if (!relocated_restore_code)
- return -ENOMEM;
- memcpy(relocated_restore_code, &core_restore_code,
- &restore_registers - &core_restore_code);
-
- restore_image();
- return 0;
-}
-
-/*
- * pfn_is_nosave - check if given pfn is in the 'nosave' section
- */
-
-int pfn_is_nosave(unsigned long pfn)
-{
- unsigned long nosave_begin_pfn = __pa_symbol(&__nosave_begin) >> PAGE_SHIFT;
- unsigned long nosave_end_pfn = PAGE_ALIGN(__pa_symbol(&__nosave_end)) >> PAGE_SHIFT;
- return (pfn >= nosave_begin_pfn) && (pfn < nosave_end_pfn);
-}
-
-struct restore_data_record {
- unsigned long jump_address;
- unsigned long cr3;
- unsigned long magic;
-};
-
-#define RESTORE_MAGIC 0x0123456789ABCDEFUL
-
-/**
- * arch_hibernation_header_save - populate the architecture specific part
- * of a hibernation image header
- * @addr: address to save the data at
- */
-int arch_hibernation_header_save(void *addr, unsigned int max_size)
-{
- struct restore_data_record *rdr = addr;
-
- if (max_size < sizeof(struct restore_data_record))
- return -EOVERFLOW;
- rdr->jump_address = restore_jump_address;
- rdr->cr3 = restore_cr3;
- rdr->magic = RESTORE_MAGIC;
- return 0;
-}
-
-/**
- * arch_hibernation_header_restore - read the architecture specific data
- * from the hibernation image header
- * @addr: address to read the data from
- */
-int arch_hibernation_header_restore(void *addr)
-{
- struct restore_data_record *rdr = addr;
-
- restore_jump_address = rdr->jump_address;
- restore_cr3 = rdr->cr3;
- return (rdr->magic == RESTORE_MAGIC) ? 0 : -EINVAL;
-}
-#endif /* CONFIG_HIBERNATION */
diff --git a/arch/x86/kernel/suspend_asm_64.S b/arch/x86/kernel/suspend_asm_64.S
deleted file mode 100644
index 72f9521..0000000
--- a/arch/x86/kernel/suspend_asm_64.S
+++ /dev/null
@@ -1,141 +0,0 @@
-/* Copyright 2004,2005 Pavel Machek <pavel@xxxxxxx>, Andi Kleen <ak@xxxxxxx>, Rafael J. Wysocki <rjw@xxxxxxx>
- *
- * Distribute under GPLv2.
- *
- * swsusp_arch_resume must not use any stack or any nonlocal variables while
- * copying pages:
- *
- * Its rewriting one kernel image with another. What is stack in "old"
- * image could very well be data page in "new" image, and overwriting
- * your own stack under you is bad idea.
- */
-
- .text
-#include <linux/linkage.h>
-#include <asm/segment.h>
-#include <asm/page.h>
-#include <asm/asm-offsets.h>
-
-ENTRY(swsusp_arch_suspend)
- movq $saved_context, %rax
- movq %rsp, pt_regs_rsp(%rax)
- movq %rbp, pt_regs_rbp(%rax)
- movq %rsi, pt_regs_rsi(%rax)
- movq %rdi, pt_regs_rdi(%rax)
- movq %rbx, pt_regs_rbx(%rax)
- movq %rcx, pt_regs_rcx(%rax)
- movq %rdx, pt_regs_rdx(%rax)
- movq %r8, pt_regs_r8(%rax)
- movq %r9, pt_regs_r9(%rax)
- movq %r10, pt_regs_r10(%rax)
- movq %r11, pt_regs_r11(%rax)
- movq %r12, pt_regs_r12(%rax)
- movq %r13, pt_regs_r13(%rax)
- movq %r14, pt_regs_r14(%rax)
- movq %r15, pt_regs_r15(%rax)
- pushfq
- popq pt_regs_eflags(%rax)
-
- /* save the address of restore_registers */
- movq $restore_registers, %rax
- movq %rax, restore_jump_address(%rip)
- /* save cr3 */
- movq %cr3, %rax
- movq %rax, restore_cr3(%rip)
-
- call swsusp_save
- ret
-
-ENTRY(restore_image)
- /* switch to temporary page tables */
- movq $__PAGE_OFFSET, %rdx
- movq temp_level4_pgt(%rip), %rax
- subq %rdx, %rax
- movq %rax, %cr3
- /* Flush TLB */
- movq mmu_cr4_features(%rip), %rax
- movq %rax, %rdx
- andq $~(1<<7), %rdx # PGE
- movq %rdx, %cr4; # turn off PGE
- movq %cr3, %rcx; # flush TLB
- movq %rcx, %cr3;
- movq %rax, %cr4; # turn PGE back on
-
- /* prepare to jump to the image kernel */
- movq restore_jump_address(%rip), %rax
- movq restore_cr3(%rip), %rbx
-
- /* prepare to copy image data to their original locations */
- movq restore_pblist(%rip), %rdx
- movq relocated_restore_code(%rip), %rcx
- jmpq *%rcx
-
- /* code below has been relocated to a safe page */
-ENTRY(core_restore_code)
-loop:
- testq %rdx, %rdx
- jz done
-
- /* get addresses from the pbe and copy the page */
- movq pbe_address(%rdx), %rsi
- movq pbe_orig_address(%rdx), %rdi
- movq $(PAGE_SIZE >> 3), %rcx
- rep
- movsq
-
- /* progress to the next pbe */
- movq pbe_next(%rdx), %rdx
- jmp loop
-done:
- /* jump to the restore_registers address from the image header */
- jmpq *%rax
- /*
- * NOTE: This assumes that the boot kernel's text mapping covers the
- * image kernel's page containing restore_registers and the address of
- * this page is the same as in the image kernel's text mapping (it
- * should always be true, because the text mapping is linear, starting
- * from 0, and is supposed to cover the entire kernel text for every
- * kernel).
- *
- * code below belongs to the image kernel
- */
-
-ENTRY(restore_registers)
- /* go back to the original page tables */
- movq %rbx, %cr3
-
- /* Flush TLB, including "global" things (vmalloc) */
- movq mmu_cr4_features(%rip), %rax
- movq %rax, %rdx
- andq $~(1<<7), %rdx; # PGE
- movq %rdx, %cr4; # turn off PGE
- movq %cr3, %rcx; # flush TLB
- movq %rcx, %cr3
- movq %rax, %cr4; # turn PGE back on
-
- /* We don't restore %rax, it must be 0 anyway */
- movq $saved_context, %rax
- movq pt_regs_rsp(%rax), %rsp
- movq pt_regs_rbp(%rax), %rbp
- movq pt_regs_rsi(%rax), %rsi
- movq pt_regs_rdi(%rax), %rdi
- movq pt_regs_rbx(%rax), %rbx
- movq pt_regs_rcx(%rax), %rcx
- movq pt_regs_rdx(%rax), %rdx
- movq pt_regs_r8(%rax), %r8
- movq pt_regs_r9(%rax), %r9
- movq pt_regs_r10(%rax), %r10
- movq pt_regs_r11(%rax), %r11
- movq pt_regs_r12(%rax), %r12
- movq pt_regs_r13(%rax), %r13
- movq pt_regs_r14(%rax), %r14
- movq pt_regs_r15(%rax), %r15
- pushq pt_regs_eflags(%rax)
- popfq
-
- xorq %rax, %rax
-
- /* tell the hibernation core that we've just restored the memory */
- movq %rax, in_suspend(%rip)
-
- ret
diff --git a/arch/x86/power/Makefile b/arch/x86/power/Makefile
index d764ec9..dd99371 100644
--- a/arch/x86/power/Makefile
+++ b/arch/x86/power/Makefile
@@ -1,2 +1,8 @@
-obj-$(CONFIG_PM) += cpu.o
-obj-$(CONFIG_HIBERNATION) += swsusp.o suspend.o
+ifeq ($(CONFIG_X86_32),y)
+obj-$(CONFIG_PM) += cpu_32.o
+obj-$(CONFIG_HIBERNATION) += hibernation_32.o suspend.o
+else
+obj-$(CONFIG_PM) += cpu_64.o
+obj-$(CONFIG_HIBERNATION) += hibernation_64.o
+endif
+
diff --git a/arch/x86/power/cpu.c b/arch/x86/power/cpu.c
deleted file mode 100644
index 998fd3e..0000000
--- a/arch/x86/power/cpu.c
+++ /dev/null
@@ -1,133 +0,0 @@
-/*
- * Suspend support specific for i386.
- *
- * Distribute under GPLv2
- *
- * Copyright (c) 2002 Pavel Machek <pavel@xxxxxxx>
- * Copyright (c) 2001 Patrick Mochel <mochel@xxxxxxxx>
- */
-
-#include <linux/module.h>
-#include <linux/suspend.h>
-#include <asm/mtrr.h>
-#include <asm/mce.h>
-
-static struct saved_context saved_context;
-
-unsigned long saved_context_ebx;
-unsigned long saved_context_esp, saved_context_ebp;
-unsigned long saved_context_esi, saved_context_edi;
-unsigned long saved_context_eflags;
-
-void __save_processor_state(struct saved_context *ctxt)
-{
- mtrr_save_fixed_ranges(NULL);
- kernel_fpu_begin();
-
- /*
- * descriptor tables
- */
- store_gdt(&ctxt->gdt);
- store_idt(&ctxt->idt);
- store_tr(ctxt->tr);
-
- /*
- * segment registers
- */
- savesegment(es, ctxt->es);
- savesegment(fs, ctxt->fs);
- savesegment(gs, ctxt->gs);
- savesegment(ss, ctxt->ss);
-
- /*
- * control registers
- */
- ctxt->cr0 = read_cr0();
- ctxt->cr2 = read_cr2();
- ctxt->cr3 = read_cr3();
- ctxt->cr4 = read_cr4();
-}
-
-void save_processor_state(void)
-{
- __save_processor_state(&saved_context);
-}
-
-static void do_fpu_end(void)
-{
- /*
- * Restore FPU regs if necessary.
- */
- kernel_fpu_end();
-}
-
-static void fix_processor_context(void)
-{
- int cpu = smp_processor_id();
- struct tss_struct * t = &per_cpu(init_tss, cpu);
-
- set_tss_desc(cpu,t); /* This just modifies memory; should not be necessary. But... This is necessary, because 386 hardware has concept of busy TSS or some similar stupidity. */
-
- load_TR_desc(); /* This does ltr */
- load_LDT(¤t->active_mm->context); /* This does lldt */
-
- /*
- * Now maybe reload the debug registers
- */
- if (current->thread.debugreg[7]){
- set_debugreg(current->thread.debugreg[0], 0);
- set_debugreg(current->thread.debugreg[1], 1);
- set_debugreg(current->thread.debugreg[2], 2);
- set_debugreg(current->thread.debugreg[3], 3);
- /* no 4 and 5 */
- set_debugreg(current->thread.debugreg[6], 6);
- set_debugreg(current->thread.debugreg[7], 7);
- }
-
-}
-
-void __restore_processor_state(struct saved_context *ctxt)
-{
- /*
- * control registers
- */
- write_cr4(ctxt->cr4);
- write_cr3(ctxt->cr3);
- write_cr2(ctxt->cr2);
- write_cr0(ctxt->cr0);
-
- /*
- * now restore the descriptor tables to their proper values
- * ltr is done i fix_processor_context().
- */
- load_gdt(&ctxt->gdt);
- load_idt(&ctxt->idt);
-
- /*
- * segment registers
- */
- loadsegment(es, ctxt->es);
- loadsegment(fs, ctxt->fs);
- loadsegment(gs, ctxt->gs);
- loadsegment(ss, ctxt->ss);
-
- /*
- * sysenter MSRs
- */
- if (boot_cpu_has(X86_FEATURE_SEP))
- enable_sep_cpu();
-
- fix_processor_context();
- do_fpu_end();
- mtrr_ap_init();
- mcheck_init(&boot_cpu_data);
-}
-
-void restore_processor_state(void)
-{
- __restore_processor_state(&saved_context);
-}
-
-/* Needed by apm.c */
-EXPORT_SYMBOL(save_processor_state);
-EXPORT_SYMBOL(restore_processor_state);
diff --git a/arch/x86/power/cpu_32.c b/arch/x86/power/cpu_32.c
new file mode 100644
index 0000000..998fd3e
--- /dev/null
+++ b/arch/x86/power/cpu_32.c
@@ -0,0 +1,133 @@
+/*
+ * Suspend support specific for i386.
+ *
+ * Distribute under GPLv2
+ *
+ * Copyright (c) 2002 Pavel Machek <pavel@xxxxxxx>
+ * Copyright (c) 2001 Patrick Mochel <mochel@xxxxxxxx>
+ */
+
+#include <linux/module.h>
+#include <linux/suspend.h>
+#include <asm/mtrr.h>
+#include <asm/mce.h>
+
+static struct saved_context saved_context;
+
+unsigned long saved_context_ebx;
+unsigned long saved_context_esp, saved_context_ebp;
+unsigned long saved_context_esi, saved_context_edi;
+unsigned long saved_context_eflags;
+
+void __save_processor_state(struct saved_context *ctxt)
+{
+ mtrr_save_fixed_ranges(NULL);
+ kernel_fpu_begin();
+
+ /*
+ * descriptor tables
+ */
+ store_gdt(&ctxt->gdt);
+ store_idt(&ctxt->idt);
+ store_tr(ctxt->tr);
+
+ /*
+ * segment registers
+ */
+ savesegment(es, ctxt->es);
+ savesegment(fs, ctxt->fs);
+ savesegment(gs, ctxt->gs);
+ savesegment(ss, ctxt->ss);
+
+ /*
+ * control registers
+ */
+ ctxt->cr0 = read_cr0();
+ ctxt->cr2 = read_cr2();
+ ctxt->cr3 = read_cr3();
+ ctxt->cr4 = read_cr4();
+}
+
+void save_processor_state(void)
+{
+ __save_processor_state(&saved_context);
+}
+
+static void do_fpu_end(void)
+{
+ /*
+ * Restore FPU regs if necessary.
+ */
+ kernel_fpu_end();
+}
+
+static void fix_processor_context(void)
+{
+ int cpu = smp_processor_id();
+ struct tss_struct * t = &per_cpu(init_tss, cpu);
+
+ set_tss_desc(cpu,t); /* This just modifies memory; should not be necessary. But... This is necessary, because 386 hardware has concept of busy TSS or some similar stupidity. */
+
+ load_TR_desc(); /* This does ltr */
+ load_LDT(¤t->active_mm->context); /* This does lldt */
+
+ /*
+ * Now maybe reload the debug registers
+ */
+ if (current->thread.debugreg[7]){
+ set_debugreg(current->thread.debugreg[0], 0);
+ set_debugreg(current->thread.debugreg[1], 1);
+ set_debugreg(current->thread.debugreg[2], 2);
+ set_debugreg(current->thread.debugreg[3], 3);
+ /* no 4 and 5 */
+ set_debugreg(current->thread.debugreg[6], 6);
+ set_debugreg(current->thread.debugreg[7], 7);
+ }
+
+}
+
+void __restore_processor_state(struct saved_context *ctxt)
+{
+ /*
+ * control registers
+ */
+ write_cr4(ctxt->cr4);
+ write_cr3(ctxt->cr3);
+ write_cr2(ctxt->cr2);
+ write_cr0(ctxt->cr0);
+
+ /*
+ * now restore the descriptor tables to their proper values
+ * ltr is done i fix_processor_context().
+ */
+ load_gdt(&ctxt->gdt);
+ load_idt(&ctxt->idt);
+
+ /*
+ * segment registers
+ */
+ loadsegment(es, ctxt->es);
+ loadsegment(fs, ctxt->fs);
+ loadsegment(gs, ctxt->gs);
+ loadsegment(ss, ctxt->ss);
+
+ /*
+ * sysenter MSRs
+ */
+ if (boot_cpu_has(X86_FEATURE_SEP))
+ enable_sep_cpu();
+
+ fix_processor_context();
+ do_fpu_end();
+ mtrr_ap_init();
+ mcheck_init(&boot_cpu_data);
+}
+
+void restore_processor_state(void)
+{
+ __restore_processor_state(&saved_context);
+}
+
+/* Needed by apm.c */
+EXPORT_SYMBOL(save_processor_state);
+EXPORT_SYMBOL(restore_processor_state);
diff --git a/arch/x86/power/cpu_64.c b/arch/x86/power/cpu_64.c
new file mode 100644
index 0000000..2e5efaa
--- /dev/null
+++ b/arch/x86/power/cpu_64.c
@@ -0,0 +1,294 @@
+/*
+ * Suspend support specific for i386.
+ *
+ * Distribute under GPLv2
+ *
+ * Copyright (c) 2002 Pavel Machek <pavel@xxxxxxx>
+ * Copyright (c) 2001 Patrick Mochel <mochel@xxxxxxxx>
+ */
+
+#include <linux/smp.h>
+#include <linux/suspend.h>
+#include <asm/proto.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/mtrr.h>
+
+/* References to section boundaries */
+extern const void __nosave_begin, __nosave_end;
+
+struct saved_context saved_context;
+
+void __save_processor_state(struct saved_context *ctxt)
+{
+ kernel_fpu_begin();
+
+ /*
+ * descriptor tables
+ */
+ store_gdt((struct desc_ptr *)&ctxt->gdt_limit);
+ store_idt((struct desc_ptr *)&ctxt->idt_limit);
+ store_tr(ctxt->tr);
+
+ /* XMM0..XMM15 should be handled by kernel_fpu_begin(). */
+ /*
+ * segment registers
+ */
+ asm volatile ("movw %%ds, %0" : "=m" (ctxt->ds));
+ asm volatile ("movw %%es, %0" : "=m" (ctxt->es));
+ asm volatile ("movw %%fs, %0" : "=m" (ctxt->fs));
+ asm volatile ("movw %%gs, %0" : "=m" (ctxt->gs));
+ asm volatile ("movw %%ss, %0" : "=m" (ctxt->ss));
+
+ rdmsrl(MSR_FS_BASE, ctxt->fs_base);
+ rdmsrl(MSR_GS_BASE, ctxt->gs_base);
+ rdmsrl(MSR_KERNEL_GS_BASE, ctxt->gs_kernel_base);
+ mtrr_save_fixed_ranges(NULL);
+
+ /*
+ * control registers
+ */
+ rdmsrl(MSR_EFER, ctxt->efer);
+ ctxt->cr0 = read_cr0();
+ ctxt->cr2 = read_cr2();
+ ctxt->cr3 = read_cr3();
+ ctxt->cr4 = read_cr4();
+ ctxt->cr8 = read_cr8();
+}
+
+void save_processor_state(void)
+{
+ __save_processor_state(&saved_context);
+}
+
+static void do_fpu_end(void)
+{
+ /*
+ * Restore FPU regs if necessary
+ */
+ kernel_fpu_end();
+}
+
+void __restore_processor_state(struct saved_context *ctxt)
+{
+ /*
+ * control registers
+ */
+ wrmsrl(MSR_EFER, ctxt->efer);
+ write_cr8(ctxt->cr8);
+ write_cr4(ctxt->cr4);
+ write_cr3(ctxt->cr3);
+ write_cr2(ctxt->cr2);
+ write_cr0(ctxt->cr0);
+
+ /*
+ * now restore the descriptor tables to their proper values
+ * ltr is done i fix_processor_context().
+ */
+ load_gdt((const struct desc_ptr *)&ctxt->gdt_limit);
+ load_idt((const struct desc_ptr *)&ctxt->idt_limit);
+
+
+ /*
+ * segment registers
+ */
+ asm volatile ("movw %0, %%ds" :: "r" (ctxt->ds));
+ asm volatile ("movw %0, %%es" :: "r" (ctxt->es));
+ asm volatile ("movw %0, %%fs" :: "r" (ctxt->fs));
+ load_gs_index(ctxt->gs);
+ asm volatile ("movw %0, %%ss" :: "r" (ctxt->ss));
+
+ wrmsrl(MSR_FS_BASE, ctxt->fs_base);
+ wrmsrl(MSR_GS_BASE, ctxt->gs_base);
+ wrmsrl(MSR_KERNEL_GS_BASE, ctxt->gs_kernel_base);
+
+ fix_processor_context();
+
+ do_fpu_end();
+ mtrr_ap_init();
+}
+
+void restore_processor_state(void)
+{
+ __restore_processor_state(&saved_context);
+}
+
+void fix_processor_context(void)
+{
+ int cpu = smp_processor_id();
+ struct tss_struct *t = &per_cpu(init_tss, cpu);
+
+ set_tss_desc(cpu,t); /* This just modifies memory; should not be necessary. But... This is necessary, because 386 hardware has concept of busy TSS or some similar stupidity. */
+
+ cpu_gdt(cpu)[GDT_ENTRY_TSS].type = 9;
+
+ syscall_init(); /* This sets MSR_*STAR and related */
+ load_TR_desc(); /* This does ltr */
+ load_LDT(¤t->active_mm->context); /* This does lldt */
+
+ /*
+ * Now maybe reload the debug registers
+ */
+ if (current->thread.debugreg7){
+ loaddebug(¤t->thread, 0);
+ loaddebug(¤t->thread, 1);
+ loaddebug(¤t->thread, 2);
+ loaddebug(¤t->thread, 3);
+ /* no 4 and 5 */
+ loaddebug(¤t->thread, 6);
+ loaddebug(¤t->thread, 7);
+ }
+
+}
+
+#ifdef CONFIG_HIBERNATION
+/* Defined in arch/x86_64/kernel/suspend_asm.S */
+extern int restore_image(void);
+
+/*
+ * Address to jump to in the last phase of restore in order to get to the image
+ * kernel's text (this value is passed in the image header).
+ */
+unsigned long restore_jump_address;
+
+/*
+ * Value of the cr3 register from before the hibernation (this value is passed
+ * in the image header).
+ */
+unsigned long restore_cr3;
+
+pgd_t *temp_level4_pgt;
+
+void *relocated_restore_code;
+
+static int res_phys_pud_init(pud_t *pud, unsigned long address, unsigned long end)
+{
+ long i, j;
+
+ i = pud_index(address);
+ pud = pud + i;
+ for (; i < PTRS_PER_PUD; pud++, i++) {
+ unsigned long paddr;
+ pmd_t *pmd;
+
+ paddr = address + i*PUD_SIZE;
+ if (paddr >= end)
+ break;
+
+ pmd = (pmd_t *)get_safe_page(GFP_ATOMIC);
+ if (!pmd)
+ return -ENOMEM;
+ set_pud(pud, __pud(__pa(pmd) | _KERNPG_TABLE));
+ for (j = 0; j < PTRS_PER_PMD; pmd++, j++, paddr += PMD_SIZE) {
+ unsigned long pe;
+
+ if (paddr >= end)
+ break;
+ pe = __PAGE_KERNEL_LARGE_EXEC | paddr;
+ pe &= __supported_pte_mask;
+ set_pmd(pmd, __pmd(pe));
+ }
+ }
+ return 0;
+}
+
+static int set_up_temporary_mappings(void)
+{
+ unsigned long start, end, next;
+ int error;
+
+ temp_level4_pgt = (pgd_t *)get_safe_page(GFP_ATOMIC);
+ if (!temp_level4_pgt)
+ return -ENOMEM;
+
+ /* It is safe to reuse the original kernel mapping */
+ set_pgd(temp_level4_pgt + pgd_index(__START_KERNEL_map),
+ init_level4_pgt[pgd_index(__START_KERNEL_map)]);
+
+ /* Set up the direct mapping from scratch */
+ start = (unsigned long)pfn_to_kaddr(0);
+ end = (unsigned long)pfn_to_kaddr(end_pfn);
+
+ for (; start < end; start = next) {
+ pud_t *pud = (pud_t *)get_safe_page(GFP_ATOMIC);
+ if (!pud)
+ return -ENOMEM;
+ next = start + PGDIR_SIZE;
+ if (next > end)
+ next = end;
+ if ((error = res_phys_pud_init(pud, __pa(start), __pa(next))))
+ return error;
+ set_pgd(temp_level4_pgt + pgd_index(start),
+ mk_kernel_pgd(__pa(pud)));
+ }
+ return 0;
+}
+
+int swsusp_arch_resume(void)
+{
+ int error;
+
+ /* We have got enough memory and from now on we cannot recover */
+ if ((error = set_up_temporary_mappings()))
+ return error;
+
+ relocated_restore_code = (void *)get_safe_page(GFP_ATOMIC);
+ if (!relocated_restore_code)
+ return -ENOMEM;
+ memcpy(relocated_restore_code, &core_restore_code,
+ &restore_registers - &core_restore_code);
+
+ restore_image();
+ return 0;
+}
+
+/*
+ * pfn_is_nosave - check if given pfn is in the 'nosave' section
+ */
+
+int pfn_is_nosave(unsigned long pfn)
+{
+ unsigned long nosave_begin_pfn = __pa_symbol(&__nosave_begin) >> PAGE_SHIFT;
+ unsigned long nosave_end_pfn = PAGE_ALIGN(__pa_symbol(&__nosave_end)) >> PAGE_SHIFT;
+ return (pfn >= nosave_begin_pfn) && (pfn < nosave_end_pfn);
+}
+
+struct restore_data_record {
+ unsigned long jump_address;
+ unsigned long cr3;
+ unsigned long magic;
+};
+
+#define RESTORE_MAGIC 0x0123456789ABCDEFUL
+
+/**
+ * arch_hibernation_header_save - populate the architecture specific part
+ * of a hibernation image header
+ * @addr: address to save the data at
+ */
+int arch_hibernation_header_save(void *addr, unsigned int max_size)
+{
+ struct restore_data_record *rdr = addr;
+
+ if (max_size < sizeof(struct restore_data_record))
+ return -EOVERFLOW;
+ rdr->jump_address = restore_jump_address;
+ rdr->cr3 = restore_cr3;
+ rdr->magic = RESTORE_MAGIC;
+ return 0;
+}
+
+/**
+ * arch_hibernation_header_restore - read the architecture specific data
+ * from the hibernation image header
+ * @addr: address to read the data from
+ */
+int arch_hibernation_header_restore(void *addr)
+{
+ struct restore_data_record *rdr = addr;
+
+ restore_jump_address = rdr->jump_address;
+ restore_cr3 = rdr->cr3;
+ return (rdr->magic == RESTORE_MAGIC) ? 0 : -EINVAL;
+}
+#endif /* CONFIG_HIBERNATION */
diff --git a/arch/x86/power/hibernation_32.S b/arch/x86/power/hibernation_32.S
new file mode 100644
index 0000000..53662e0
--- /dev/null
+++ b/arch/x86/power/hibernation_32.S
@@ -0,0 +1,78 @@
+.text
+
+/* Originally gcc generated, modified by hand
+ *
+ * This may not use any stack, nor any variable that is not "NoSave":
+ *
+ * Its rewriting one kernel image with another. What is stack in "old"
+ * image could very well be data page in "new" image, and overwriting
+ * your own stack under you is bad idea.
+ */
+
+#include <linux/linkage.h>
+#include <asm/segment.h>
+#include <asm/page.h>
+#include <asm/asm-offsets.h>
+
+ .text
+
+ENTRY(swsusp_arch_suspend)
+
+ movl %esp, saved_context_esp
+ movl %ebx, saved_context_ebx
+ movl %ebp, saved_context_ebp
+ movl %esi, saved_context_esi
+ movl %edi, saved_context_edi
+ pushfl ; popl saved_context_eflags
+
+ call swsusp_save
+ ret
+
+ENTRY(restore_image)
+ movl resume_pg_dir, %ecx
+ subl $__PAGE_OFFSET, %ecx
+ movl %ecx, %cr3
+
+ movl restore_pblist, %edx
+ .p2align 4,,7
+
+copy_loop:
+ testl %edx, %edx
+ jz done
+
+ movl pbe_address(%edx), %esi
+ movl pbe_orig_address(%edx), %edi
+
+ movl $1024, %ecx
+ rep
+ movsl
+
+ movl pbe_next(%edx), %edx
+ jmp copy_loop
+ .p2align 4,,7
+
+done:
+ /* go back to the original page tables */
+ movl $swapper_pg_dir, %ecx
+ subl $__PAGE_OFFSET, %ecx
+ movl %ecx, %cr3
+ /* Flush TLB, including "global" things (vmalloc) */
+ movl mmu_cr4_features, %eax
+ movl %eax, %edx
+ andl $~(1<<7), %edx; # PGE
+ movl %edx, %cr4; # turn off PGE
+ movl %cr3, %ecx; # flush TLB
+ movl %ecx, %cr3
+ movl %eax, %cr4; # turn PGE back on
+
+ movl saved_context_esp, %esp
+ movl saved_context_ebp, %ebp
+ movl saved_context_ebx, %ebx
+ movl saved_context_esi, %esi
+ movl saved_context_edi, %edi
+
+ pushl saved_context_eflags ; popfl
+
+ xorl %eax, %eax
+
+ ret
diff --git a/arch/x86/power/hibernation_64.S b/arch/x86/power/hibernation_64.S
new file mode 100644
index 0000000..72f9521
--- /dev/null
+++ b/arch/x86/power/hibernation_64.S
@@ -0,0 +1,141 @@
+/* Copyright 2004,2005 Pavel Machek <pavel@xxxxxxx>, Andi Kleen <ak@xxxxxxx>, Rafael J. Wysocki <rjw@xxxxxxx>
+ *
+ * Distribute under GPLv2.
+ *
+ * swsusp_arch_resume must not use any stack or any nonlocal variables while
+ * copying pages:
+ *
+ * Its rewriting one kernel image with another. What is stack in "old"
+ * image could very well be data page in "new" image, and overwriting
+ * your own stack under you is bad idea.
+ */
+
+ .text
+#include <linux/linkage.h>
+#include <asm/segment.h>
+#include <asm/page.h>
+#include <asm/asm-offsets.h>
+
+ENTRY(swsusp_arch_suspend)
+ movq $saved_context, %rax
+ movq %rsp, pt_regs_rsp(%rax)
+ movq %rbp, pt_regs_rbp(%rax)
+ movq %rsi, pt_regs_rsi(%rax)
+ movq %rdi, pt_regs_rdi(%rax)
+ movq %rbx, pt_regs_rbx(%rax)
+ movq %rcx, pt_regs_rcx(%rax)
+ movq %rdx, pt_regs_rdx(%rax)
+ movq %r8, pt_regs_r8(%rax)
+ movq %r9, pt_regs_r9(%rax)
+ movq %r10, pt_regs_r10(%rax)
+ movq %r11, pt_regs_r11(%rax)
+ movq %r12, pt_regs_r12(%rax)
+ movq %r13, pt_regs_r13(%rax)
+ movq %r14, pt_regs_r14(%rax)
+ movq %r15, pt_regs_r15(%rax)
+ pushfq
+ popq pt_regs_eflags(%rax)
+
+ /* save the address of restore_registers */
+ movq $restore_registers, %rax
+ movq %rax, restore_jump_address(%rip)
+ /* save cr3 */
+ movq %cr3, %rax
+ movq %rax, restore_cr3(%rip)
+
+ call swsusp_save
+ ret
+
+ENTRY(restore_image)
+ /* switch to temporary page tables */
+ movq $__PAGE_OFFSET, %rdx
+ movq temp_level4_pgt(%rip), %rax
+ subq %rdx, %rax
+ movq %rax, %cr3
+ /* Flush TLB */
+ movq mmu_cr4_features(%rip), %rax
+ movq %rax, %rdx
+ andq $~(1<<7), %rdx # PGE
+ movq %rdx, %cr4; # turn off PGE
+ movq %cr3, %rcx; # flush TLB
+ movq %rcx, %cr3;
+ movq %rax, %cr4; # turn PGE back on
+
+ /* prepare to jump to the image kernel */
+ movq restore_jump_address(%rip), %rax
+ movq restore_cr3(%rip), %rbx
+
+ /* prepare to copy image data to their original locations */
+ movq restore_pblist(%rip), %rdx
+ movq relocated_restore_code(%rip), %rcx
+ jmpq *%rcx
+
+ /* code below has been relocated to a safe page */
+ENTRY(core_restore_code)
+loop:
+ testq %rdx, %rdx
+ jz done
+
+ /* get addresses from the pbe and copy the page */
+ movq pbe_address(%rdx), %rsi
+ movq pbe_orig_address(%rdx), %rdi
+ movq $(PAGE_SIZE >> 3), %rcx
+ rep
+ movsq
+
+ /* progress to the next pbe */
+ movq pbe_next(%rdx), %rdx
+ jmp loop
+done:
+ /* jump to the restore_registers address from the image header */
+ jmpq *%rax
+ /*
+ * NOTE: This assumes that the boot kernel's text mapping covers the
+ * image kernel's page containing restore_registers and the address of
+ * this page is the same as in the image kernel's text mapping (it
+ * should always be true, because the text mapping is linear, starting
+ * from 0, and is supposed to cover the entire kernel text for every
+ * kernel).
+ *
+ * code below belongs to the image kernel
+ */
+
+ENTRY(restore_registers)
+ /* go back to the original page tables */
+ movq %rbx, %cr3
+
+ /* Flush TLB, including "global" things (vmalloc) */
+ movq mmu_cr4_features(%rip), %rax
+ movq %rax, %rdx
+ andq $~(1<<7), %rdx; # PGE
+ movq %rdx, %cr4; # turn off PGE
+ movq %cr3, %rcx; # flush TLB
+ movq %rcx, %cr3
+ movq %rax, %cr4; # turn PGE back on
+
+ /* We don't restore %rax, it must be 0 anyway */
+ movq $saved_context, %rax
+ movq pt_regs_rsp(%rax), %rsp
+ movq pt_regs_rbp(%rax), %rbp
+ movq pt_regs_rsi(%rax), %rsi
+ movq pt_regs_rdi(%rax), %rdi
+ movq pt_regs_rbx(%rax), %rbx
+ movq pt_regs_rcx(%rax), %rcx
+ movq pt_regs_rdx(%rax), %rdx
+ movq pt_regs_r8(%rax), %r8
+ movq pt_regs_r9(%rax), %r9
+ movq pt_regs_r10(%rax), %r10
+ movq pt_regs_r11(%rax), %r11
+ movq pt_regs_r12(%rax), %r12
+ movq pt_regs_r13(%rax), %r13
+ movq pt_regs_r14(%rax), %r14
+ movq pt_regs_r15(%rax), %r15
+ pushq pt_regs_eflags(%rax)
+ popfq
+
+ xorq %rax, %rax
+
+ /* tell the hibernation core that we've just restored the memory */
+ movq %rax, in_suspend(%rip)
+
+ ret
diff --git a/arch/x86/power/swsusp.S b/arch/x86/power/swsusp.S
deleted file mode 100644
index 53662e0..0000000
--- a/arch/x86/power/swsusp.S
+++ /dev/null
@@ -1,78 +0,0 @@
-.text
-
-/* Originally gcc generated, modified by hand
- *
- * This may not use any stack, nor any variable that is not "NoSave":
- *
- * Its rewriting one kernel image with another. What is stack in "old"
- * image could very well be data page in "new" image, and overwriting
- * your own stack under you is bad idea.
- */
-
-#include <linux/linkage.h>
-#include <asm/segment.h>
-#include <asm/page.h>
-#include <asm/asm-offsets.h>
-
- .text
-
-ENTRY(swsusp_arch_suspend)
-
- movl %esp, saved_context_esp
- movl %ebx, saved_context_ebx
- movl %ebp, saved_context_ebp
- movl %esi, saved_context_esi
- movl %edi, saved_context_edi
- pushfl ; popl saved_context_eflags
-
- call swsusp_save
- ret
-
-ENTRY(restore_image)
- movl resume_pg_dir, %ecx
- subl $__PAGE_OFFSET, %ecx
- movl %ecx, %cr3
-
- movl restore_pblist, %edx
- .p2align 4,,7
-
-copy_loop:
- testl %edx, %edx
- jz done
-
- movl pbe_address(%edx), %esi
- movl pbe_orig_address(%edx), %edi
-
- movl $1024, %ecx
- rep
- movsl
-
- movl pbe_next(%edx), %edx
- jmp copy_loop
- .p2align 4,,7
-
-done:
- /* go back to the original page tables */
- movl $swapper_pg_dir, %ecx
- subl $__PAGE_OFFSET, %ecx
- movl %ecx, %cr3
- /* Flush TLB, including "global" things (vmalloc) */
- movl mmu_cr4_features, %eax
- movl %eax, %edx
- andl $~(1<<7), %edx; # PGE
- movl %edx, %cr4; # turn off PGE
- movl %cr3, %ecx; # flush TLB
- movl %ecx, %cr3
- movl %eax, %cr4; # turn PGE back on
-
- movl saved_context_esp, %esp
- movl saved_context_ebp, %ebp
- movl saved_context_ebx, %ebx
- movl saved_context_esi, %esi
- movl saved_context_edi, %edi
-
- pushl saved_context_eflags ; popfl
-
- xorl %eax, %eax
-
- ret
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
_______________________________________________
linux-pm mailing list
linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx
https://lists.linux-foundation.org/mailman/listinfo/linux-pm
