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authorThomas Gleixner <tglx@linutronix.de>2007-10-11 05:16:34 -0400
committerThomas Gleixner <tglx@linutronix.de>2007-10-11 05:16:34 -0400
commit4b60eb8380a0b588a03b6052d7ac93e1964c75b8 (patch)
tree0b66caf260001230144ba3d09bde84d3bd58dc81 /arch/i386
parent44f0257fc316ff4b33aa3438dd8d891b7d6d72b9 (diff)
i386: move power
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/i386')
-rw-r--r--arch/i386/Makefile2
-rw-r--r--arch/i386/power/Makefile2
-rw-r--r--arch/i386/power/cpu.c133
-rw-r--r--arch/i386/power/suspend.c172
-rw-r--r--arch/i386/power/swsusp.S78
5 files changed, 1 insertions, 386 deletions
diff --git a/arch/i386/Makefile b/arch/i386/Makefile
index 93492b37061c..da64799484a7 100644
--- a/arch/i386/Makefile
+++ b/arch/i386/Makefile
@@ -110,7 +110,7 @@ drivers-$(CONFIG_MATH_EMULATION) += arch/x86/math-emu/
110drivers-$(CONFIG_PCI) += arch/i386/pci/ 110drivers-$(CONFIG_PCI) += arch/i386/pci/
111# must be linked after kernel/ 111# must be linked after kernel/
112drivers-$(CONFIG_OPROFILE) += arch/i386/oprofile/ 112drivers-$(CONFIG_OPROFILE) += arch/i386/oprofile/
113drivers-$(CONFIG_PM) += arch/i386/power/ 113drivers-$(CONFIG_PM) += arch/x86/power/
114drivers-$(CONFIG_FB) += arch/i386/video/ 114drivers-$(CONFIG_FB) += arch/i386/video/
115 115
116CFLAGS += $(mflags-y) 116CFLAGS += $(mflags-y)
diff --git a/arch/i386/power/Makefile b/arch/i386/power/Makefile
deleted file mode 100644
index d764ec950065..000000000000
--- a/arch/i386/power/Makefile
+++ /dev/null
@@ -1,2 +0,0 @@
1obj-$(CONFIG_PM) += cpu.o
2obj-$(CONFIG_HIBERNATION) += swsusp.o suspend.o
diff --git a/arch/i386/power/cpu.c b/arch/i386/power/cpu.c
deleted file mode 100644
index 998fd3ec0d68..000000000000
--- a/arch/i386/power/cpu.c
+++ /dev/null
@@ -1,133 +0,0 @@
1/*
2 * Suspend support specific for i386.
3 *
4 * Distribute under GPLv2
5 *
6 * Copyright (c) 2002 Pavel Machek <pavel@suse.cz>
7 * Copyright (c) 2001 Patrick Mochel <mochel@osdl.org>
8 */
9
10#include <linux/module.h>
11#include <linux/suspend.h>
12#include <asm/mtrr.h>
13#include <asm/mce.h>
14
15static struct saved_context saved_context;
16
17unsigned long saved_context_ebx;
18unsigned long saved_context_esp, saved_context_ebp;
19unsigned long saved_context_esi, saved_context_edi;
20unsigned long saved_context_eflags;
21
22void __save_processor_state(struct saved_context *ctxt)
23{
24 mtrr_save_fixed_ranges(NULL);
25 kernel_fpu_begin();
26
27 /*
28 * descriptor tables
29 */
30 store_gdt(&ctxt->gdt);
31 store_idt(&ctxt->idt);
32 store_tr(ctxt->tr);
33
34 /*
35 * segment registers
36 */
37 savesegment(es, ctxt->es);
38 savesegment(fs, ctxt->fs);
39 savesegment(gs, ctxt->gs);
40 savesegment(ss, ctxt->ss);
41
42 /*
43 * control registers
44 */
45 ctxt->cr0 = read_cr0();
46 ctxt->cr2 = read_cr2();
47 ctxt->cr3 = read_cr3();
48 ctxt->cr4 = read_cr4();
49}
50
51void save_processor_state(void)
52{
53 __save_processor_state(&saved_context);
54}
55
56static void do_fpu_end(void)
57{
58 /*
59 * Restore FPU regs if necessary.
60 */
61 kernel_fpu_end();
62}
63
64static void fix_processor_context(void)
65{
66 int cpu = smp_processor_id();
67 struct tss_struct * t = &per_cpu(init_tss, cpu);
68
69 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. */
70
71 load_TR_desc(); /* This does ltr */
72 load_LDT(&current->active_mm->context); /* This does lldt */
73
74 /*
75 * Now maybe reload the debug registers
76 */
77 if (current->thread.debugreg[7]){
78 set_debugreg(current->thread.debugreg[0], 0);
79 set_debugreg(current->thread.debugreg[1], 1);
80 set_debugreg(current->thread.debugreg[2], 2);
81 set_debugreg(current->thread.debugreg[3], 3);
82 /* no 4 and 5 */
83 set_debugreg(current->thread.debugreg[6], 6);
84 set_debugreg(current->thread.debugreg[7], 7);
85 }
86
87}
88
89void __restore_processor_state(struct saved_context *ctxt)
90{
91 /*
92 * control registers
93 */
94 write_cr4(ctxt->cr4);
95 write_cr3(ctxt->cr3);
96 write_cr2(ctxt->cr2);
97 write_cr0(ctxt->cr0);
98
99 /*
100 * now restore the descriptor tables to their proper values
101 * ltr is done i fix_processor_context().
102 */
103 load_gdt(&ctxt->gdt);
104 load_idt(&ctxt->idt);
105
106 /*
107 * segment registers
108 */
109 loadsegment(es, ctxt->es);
110 loadsegment(fs, ctxt->fs);
111 loadsegment(gs, ctxt->gs);
112 loadsegment(ss, ctxt->ss);
113
114 /*
115 * sysenter MSRs
116 */
117 if (boot_cpu_has(X86_FEATURE_SEP))
118 enable_sep_cpu();
119
120 fix_processor_context();
121 do_fpu_end();
122 mtrr_ap_init();
123 mcheck_init(&boot_cpu_data);
124}
125
126void restore_processor_state(void)
127{
128 __restore_processor_state(&saved_context);
129}
130
131/* Needed by apm.c */
132EXPORT_SYMBOL(save_processor_state);
133EXPORT_SYMBOL(restore_processor_state);
diff --git a/arch/i386/power/suspend.c b/arch/i386/power/suspend.c
deleted file mode 100644
index a0020b913f31..000000000000
--- a/arch/i386/power/suspend.c
+++ /dev/null
@@ -1,172 +0,0 @@
1/*
2 * Suspend support specific for i386 - temporary page tables
3 *
4 * Distribute under GPLv2
5 *
6 * Copyright (c) 2006 Rafael J. Wysocki <rjw@sisk.pl>
7 */
8
9#include <linux/suspend.h>
10#include <linux/bootmem.h>
11
12#include <asm/system.h>
13#include <asm/page.h>
14#include <asm/pgtable.h>
15
16/* Defined in arch/i386/power/swsusp.S */
17extern int restore_image(void);
18
19/* References to section boundaries */
20extern const void __nosave_begin, __nosave_end;
21
22/* Pointer to the temporary resume page tables */
23pgd_t *resume_pg_dir;
24
25/* The following three functions are based on the analogous code in
26 * arch/i386/mm/init.c
27 */
28
29/*
30 * Create a middle page table on a resume-safe page and put a pointer to it in
31 * the given global directory entry. This only returns the gd entry
32 * in non-PAE compilation mode, since the middle layer is folded.
33 */
34static pmd_t *resume_one_md_table_init(pgd_t *pgd)
35{
36 pud_t *pud;
37 pmd_t *pmd_table;
38
39#ifdef CONFIG_X86_PAE
40 pmd_table = (pmd_t *)get_safe_page(GFP_ATOMIC);
41 if (!pmd_table)
42 return NULL;
43
44 set_pgd(pgd, __pgd(__pa(pmd_table) | _PAGE_PRESENT));
45 pud = pud_offset(pgd, 0);
46
47 BUG_ON(pmd_table != pmd_offset(pud, 0));
48#else
49 pud = pud_offset(pgd, 0);
50 pmd_table = pmd_offset(pud, 0);
51#endif
52
53 return pmd_table;
54}
55
56/*
57 * Create a page table on a resume-safe page and place a pointer to it in
58 * a middle page directory entry.
59 */
60static pte_t *resume_one_page_table_init(pmd_t *pmd)
61{
62 if (pmd_none(*pmd)) {
63 pte_t *page_table = (pte_t *)get_safe_page(GFP_ATOMIC);
64 if (!page_table)
65 return NULL;
66
67 set_pmd(pmd, __pmd(__pa(page_table) | _PAGE_TABLE));
68
69 BUG_ON(page_table != pte_offset_kernel(pmd, 0));
70
71 return page_table;
72 }
73
74 return pte_offset_kernel(pmd, 0);
75}
76
77/*
78 * This maps the physical memory to kernel virtual address space, a total
79 * of max_low_pfn pages, by creating page tables starting from address
80 * PAGE_OFFSET. The page tables are allocated out of resume-safe pages.
81 */
82static int resume_physical_mapping_init(pgd_t *pgd_base)
83{
84 unsigned long pfn;
85 pgd_t *pgd;
86 pmd_t *pmd;
87 pte_t *pte;
88 int pgd_idx, pmd_idx;
89
90 pgd_idx = pgd_index(PAGE_OFFSET);
91 pgd = pgd_base + pgd_idx;
92 pfn = 0;
93
94 for (; pgd_idx < PTRS_PER_PGD; pgd++, pgd_idx++) {
95 pmd = resume_one_md_table_init(pgd);
96 if (!pmd)
97 return -ENOMEM;
98
99 if (pfn >= max_low_pfn)
100 continue;
101
102 for (pmd_idx = 0; pmd_idx < PTRS_PER_PMD; pmd++, pmd_idx++) {
103 if (pfn >= max_low_pfn)
104 break;
105
106 /* Map with big pages if possible, otherwise create
107 * normal page tables.
108 * NOTE: We can mark everything as executable here
109 */
110 if (cpu_has_pse) {
111 set_pmd(pmd, pfn_pmd(pfn, PAGE_KERNEL_LARGE_EXEC));
112 pfn += PTRS_PER_PTE;
113 } else {
114 pte_t *max_pte;
115
116 pte = resume_one_page_table_init(pmd);
117 if (!pte)
118 return -ENOMEM;
119
120 max_pte = pte + PTRS_PER_PTE;
121 for (; pte < max_pte; pte++, pfn++) {
122 if (pfn >= max_low_pfn)
123 break;
124
125 set_pte(pte, pfn_pte(pfn, PAGE_KERNEL_EXEC));
126 }
127 }
128 }
129 }
130 return 0;
131}
132
133static inline void resume_init_first_level_page_table(pgd_t *pg_dir)
134{
135#ifdef CONFIG_X86_PAE
136 int i;
137
138 /* Init entries of the first-level page table to the zero page */
139 for (i = 0; i < PTRS_PER_PGD; i++)
140 set_pgd(pg_dir + i,
141 __pgd(__pa(empty_zero_page) | _PAGE_PRESENT));
142#endif
143}
144
145int swsusp_arch_resume(void)
146{
147 int error;
148
149 resume_pg_dir = (pgd_t *)get_safe_page(GFP_ATOMIC);
150 if (!resume_pg_dir)
151 return -ENOMEM;
152
153 resume_init_first_level_page_table(resume_pg_dir);
154 error = resume_physical_mapping_init(resume_pg_dir);
155 if (error)
156 return error;
157
158 /* We have got enough memory and from now on we cannot recover */
159 restore_image();
160 return 0;
161}
162
163/*
164 * pfn_is_nosave - check if given pfn is in the 'nosave' section
165 */
166
167int pfn_is_nosave(unsigned long pfn)
168{
169 unsigned long nosave_begin_pfn = __pa_symbol(&__nosave_begin) >> PAGE_SHIFT;
170 unsigned long nosave_end_pfn = PAGE_ALIGN(__pa_symbol(&__nosave_end)) >> PAGE_SHIFT;
171 return (pfn >= nosave_begin_pfn) && (pfn < nosave_end_pfn);
172}
diff --git a/arch/i386/power/swsusp.S b/arch/i386/power/swsusp.S
deleted file mode 100644
index 53662e05b393..000000000000
--- a/arch/i386/power/swsusp.S
+++ /dev/null
@@ -1,78 +0,0 @@
1.text
2
3/* Originally gcc generated, modified by hand
4 *
5 * This may not use any stack, nor any variable that is not "NoSave":
6 *
7 * Its rewriting one kernel image with another. What is stack in "old"
8 * image could very well be data page in "new" image, and overwriting
9 * your own stack under you is bad idea.
10 */
11
12#include <linux/linkage.h>
13#include <asm/segment.h>
14#include <asm/page.h>
15#include <asm/asm-offsets.h>
16
17 .text
18
19ENTRY(swsusp_arch_suspend)
20
21 movl %esp, saved_context_esp
22 movl %ebx, saved_context_ebx
23 movl %ebp, saved_context_ebp
24 movl %esi, saved_context_esi
25 movl %edi, saved_context_edi
26 pushfl ; popl saved_context_eflags
27
28 call swsusp_save
29 ret
30
31ENTRY(restore_image)
32 movl resume_pg_dir, %ecx
33 subl $__PAGE_OFFSET, %ecx
34 movl %ecx, %cr3
35
36 movl restore_pblist, %edx
37 .p2align 4,,7
38
39copy_loop:
40 testl %edx, %edx
41 jz done
42
43 movl pbe_address(%edx), %esi
44 movl pbe_orig_address(%edx), %edi
45
46 movl $1024, %ecx
47 rep
48 movsl
49
50 movl pbe_next(%edx), %edx
51 jmp copy_loop
52 .p2align 4,,7
53
54done:
55 /* go back to the original page tables */
56 movl $swapper_pg_dir, %ecx
57 subl $__PAGE_OFFSET, %ecx
58 movl %ecx, %cr3
59 /* Flush TLB, including "global" things (vmalloc) */
60 movl mmu_cr4_features, %eax
61 movl %eax, %edx
62 andl $~(1<<7), %edx; # PGE
63 movl %edx, %cr4; # turn off PGE
64 movl %cr3, %ecx; # flush TLB
65 movl %ecx, %cr3
66 movl %eax, %cr4; # turn PGE back on
67
68 movl saved_context_esp, %esp
69 movl saved_context_ebp, %ebp
70 movl saved_context_ebx, %ebx
71 movl saved_context_esi, %esi
72 movl saved_context_edi, %edi
73
74 pushl saved_context_eflags ; popfl
75
76 xorl %eax, %eax
77
78 ret
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