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authorArnd Bergmann <arnd@arndb.de>2012-01-07 06:51:28 -0500
committerArnd Bergmann <arnd@arndb.de>2012-01-07 06:51:28 -0500
commit40ba95fdf158713377d47736b1b3a9d75f4f2515 (patch)
tree17a3216542d1107f777fd82577c91aebbce597d6 /arch/x86/platform/efi/efi_32.c
parent70d84a6431d732cbc4e68e72b6890cdd3865d43d (diff)
parent0575fb754dbfc32a01f297e778533340a533ec68 (diff)
Merge branch 'depends/rmk/restart' into next/cleanup
Conflicts: arch/arm/mach-at91/at91cap9.c arch/arm/mach-at91/at91sam9260.c arch/arm/mach-at91/at91sam9261.c arch/arm/mach-at91/at91sam9263.c arch/arm/mach-at91/at91sam9g45.c arch/arm/mach-at91/at91sam9rl.c arch/arm/mach-exynos/cpu.c arch/arm/mach-shmobile/board-kota2.c This resolves a bunch of conflicts between the arm-soc tree and changes from the arm tree that have gone upstream. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/x86/platform/efi/efi_32.c')
-rw-r--r--arch/x86/platform/efi/efi_32.c48
1 files changed, 2 insertions, 46 deletions
diff --git a/arch/x86/platform/efi/efi_32.c b/arch/x86/platform/efi/efi_32.c
index e36bf714cb7..40e446941dd 100644
--- a/arch/x86/platform/efi/efi_32.c
+++ b/arch/x86/platform/efi/efi_32.c
@@ -39,43 +39,14 @@
39 */ 39 */
40 40
41static unsigned long efi_rt_eflags; 41static unsigned long efi_rt_eflags;
42static pgd_t efi_bak_pg_dir_pointer[2];
43 42
44void efi_call_phys_prelog(void) 43void efi_call_phys_prelog(void)
45{ 44{
46 unsigned long cr4;
47 unsigned long temp;
48 struct desc_ptr gdt_descr; 45 struct desc_ptr gdt_descr;
49 46
50 local_irq_save(efi_rt_eflags); 47 local_irq_save(efi_rt_eflags);
51 48
52 /* 49 load_cr3(initial_page_table);
53 * If I don't have PAE, I should just duplicate two entries in page
54 * directory. If I have PAE, I just need to duplicate one entry in
55 * page directory.
56 */
57 cr4 = read_cr4_safe();
58
59 if (cr4 & X86_CR4_PAE) {
60 efi_bak_pg_dir_pointer[0].pgd =
61 swapper_pg_dir[pgd_index(0)].pgd;
62 swapper_pg_dir[0].pgd =
63 swapper_pg_dir[pgd_index(PAGE_OFFSET)].pgd;
64 } else {
65 efi_bak_pg_dir_pointer[0].pgd =
66 swapper_pg_dir[pgd_index(0)].pgd;
67 efi_bak_pg_dir_pointer[1].pgd =
68 swapper_pg_dir[pgd_index(0x400000)].pgd;
69 swapper_pg_dir[pgd_index(0)].pgd =
70 swapper_pg_dir[pgd_index(PAGE_OFFSET)].pgd;
71 temp = PAGE_OFFSET + 0x400000;
72 swapper_pg_dir[pgd_index(0x400000)].pgd =
73 swapper_pg_dir[pgd_index(temp)].pgd;
74 }
75
76 /*
77 * After the lock is released, the original page table is restored.
78 */
79 __flush_tlb_all(); 50 __flush_tlb_all();
80 51
81 gdt_descr.address = __pa(get_cpu_gdt_table(0)); 52 gdt_descr.address = __pa(get_cpu_gdt_table(0));
@@ -85,28 +56,13 @@ void efi_call_phys_prelog(void)
85 56
86void efi_call_phys_epilog(void) 57void efi_call_phys_epilog(void)
87{ 58{
88 unsigned long cr4;
89 struct desc_ptr gdt_descr; 59 struct desc_ptr gdt_descr;
90 60
91 gdt_descr.address = (unsigned long)get_cpu_gdt_table(0); 61 gdt_descr.address = (unsigned long)get_cpu_gdt_table(0);
92 gdt_descr.size = GDT_SIZE - 1; 62 gdt_descr.size = GDT_SIZE - 1;
93 load_gdt(&gdt_descr); 63 load_gdt(&gdt_descr);
94 64
95 cr4 = read_cr4_safe(); 65 load_cr3(swapper_pg_dir);
96
97 if (cr4 & X86_CR4_PAE) {
98 swapper_pg_dir[pgd_index(0)].pgd =
99 efi_bak_pg_dir_pointer[0].pgd;
100 } else {
101 swapper_pg_dir[pgd_index(0)].pgd =
102 efi_bak_pg_dir_pointer[0].pgd;
103 swapper_pg_dir[pgd_index(0x400000)].pgd =
104 efi_bak_pg_dir_pointer[1].pgd;
105 }
106
107 /*
108 * After the lock is released, the original page table is restored.
109 */
110 __flush_tlb_all(); 66 __flush_tlb_all();
111 67
112 local_irq_restore(efi_rt_eflags); 68 local_irq_restore(efi_rt_eflags);