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authorRafael J. Wysocki <rjw@sisk.pl>2008-02-09 23:24:09 +0100
committerThomas Gleixner <tglx@linutronix.de>2008-02-09 23:24:09 +0100
commitc57591244a08bb441c83472f5c110151bb7c2cc6 (patch)
treeadfb539d83e67079e8bb26085b12f9d33f0120ee /arch/x86/power/hibernate_asm_32.S
parentcf7700fe24301df2c8d3636cf40784651c098207 (diff)
x86 PM: rename 32-bit files in arch/x86/power
Rename cpu.c, suspend.c and swsusp.S in arch/x86/power to cpu_32.c, hibernate_32.c and hibernate_asm_32.S, respectively, and update the purpose and copyright information in these files. Update the Makefile in arch/x86/power to reflect the above changes. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/power/hibernate_asm_32.S')
-rw-r--r--arch/x86/power/hibernate_asm_32.S77
1 files changed, 77 insertions, 0 deletions
diff --git a/arch/x86/power/hibernate_asm_32.S b/arch/x86/power/hibernate_asm_32.S
new file mode 100644
index 00000000000..b95aa6cfe3c
--- /dev/null
+++ b/arch/x86/power/hibernate_asm_32.S
@@ -0,0 +1,77 @@
+.text
+
+/*
+ * 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