summaryrefslogtreecommitdiffstats
path: root/arch/x86/kernel/acpi
diff options
context:
space:
mode:
Diffstat (limited to 'arch/x86/kernel/acpi')
-rw-r--r--arch/x86/kernel/acpi/boot.c5
-rw-r--r--arch/x86/kernel/acpi/sleep.c11
-rw-r--r--arch/x86/kernel/acpi/sleep.h2
-rw-r--r--arch/x86/kernel/acpi/wakeup_32.S9
-rw-r--r--arch/x86/kernel/acpi/wakeup_64.S20
5 files changed, 33 insertions, 14 deletions
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index 17b33ef604f3..04205ce127a1 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -1760,6 +1760,11 @@ void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
e820__update_table_print();
}
+void x86_default_set_root_pointer(u64 addr)
+{
+ boot_params.acpi_rsdp_addr = addr;
+}
+
u64 x86_default_get_root_pointer(void)
{
return boot_params.acpi_rsdp_addr;
diff --git a/arch/x86/kernel/acpi/sleep.c b/arch/x86/kernel/acpi/sleep.c
index ca13851f0570..26b7256f590f 100644
--- a/arch/x86/kernel/acpi/sleep.c
+++ b/arch/x86/kernel/acpi/sleep.c
@@ -27,6 +27,17 @@ static char temp_stack[4096];
#endif
/**
+ * acpi_get_wakeup_address - provide physical address for S3 wakeup
+ *
+ * Returns the physical address where the kernel should be resumed after the
+ * system awakes from S3, e.g. for programming into the firmware waking vector.
+ */
+unsigned long acpi_get_wakeup_address(void)
+{
+ return ((unsigned long)(real_mode_header->wakeup_start));
+}
+
+/**
* x86_acpi_enter_sleep_state - enter sleep state
* @state: Sleep state to enter.
*
diff --git a/arch/x86/kernel/acpi/sleep.h b/arch/x86/kernel/acpi/sleep.h
index fbb60ca4255c..d06c2079b6c1 100644
--- a/arch/x86/kernel/acpi/sleep.h
+++ b/arch/x86/kernel/acpi/sleep.h
@@ -3,7 +3,7 @@
* Variables and functions used by the code in sleep.c
*/
-#include <asm/realmode.h>
+#include <linux/linkage.h>
extern unsigned long saved_video_mode;
extern long saved_magic;
diff --git a/arch/x86/kernel/acpi/wakeup_32.S b/arch/x86/kernel/acpi/wakeup_32.S
index e95e95960156..daf88f8143c5 100644
--- a/arch/x86/kernel/acpi/wakeup_32.S
+++ b/arch/x86/kernel/acpi/wakeup_32.S
@@ -9,8 +9,7 @@
.code32
ALIGN
-ENTRY(wakeup_pmode_return)
-wakeup_pmode_return:
+SYM_CODE_START(wakeup_pmode_return)
movw $__KERNEL_DS, %ax
movw %ax, %ss
movw %ax, %fs
@@ -39,6 +38,7 @@ wakeup_pmode_return:
# jump to place where we left off
movl saved_eip, %eax
jmp *%eax
+SYM_CODE_END(wakeup_pmode_return)
bogus_magic:
jmp bogus_magic
@@ -72,7 +72,7 @@ restore_registers:
popfl
ret
-ENTRY(do_suspend_lowlevel)
+SYM_CODE_START(do_suspend_lowlevel)
call save_processor_state
call save_registers
pushl $3
@@ -87,10 +87,11 @@ ret_point:
call restore_registers
call restore_processor_state
ret
+SYM_CODE_END(do_suspend_lowlevel)
.data
ALIGN
-ENTRY(saved_magic) .long 0
+SYM_DATA(saved_magic, .long 0)
saved_eip: .long 0
# saved registers
diff --git a/arch/x86/kernel/acpi/wakeup_64.S b/arch/x86/kernel/acpi/wakeup_64.S
index b0715c3ac18d..c8daa92f38dc 100644
--- a/arch/x86/kernel/acpi/wakeup_64.S
+++ b/arch/x86/kernel/acpi/wakeup_64.S
@@ -14,12 +14,17 @@
/*
* Hooray, we are in Long 64-bit mode (but still running in low memory)
*/
-ENTRY(wakeup_long64)
+SYM_FUNC_START(wakeup_long64)
movq saved_magic, %rax
movq $0x123456789abcdef0, %rdx
cmpq %rdx, %rax
- jne bogus_64_magic
+ je 2f
+ /* stop here on a saved_magic mismatch */
+ movq $0xbad6d61676963, %rcx
+1:
+ jmp 1b
+2:
movw $__KERNEL_DS, %ax
movw %ax, %ss
movw %ax, %ds
@@ -35,12 +40,9 @@ ENTRY(wakeup_long64)
movq saved_rip, %rax
jmp *%rax
-ENDPROC(wakeup_long64)
+SYM_FUNC_END(wakeup_long64)
-bogus_64_magic:
- jmp bogus_64_magic
-
-ENTRY(do_suspend_lowlevel)
+SYM_FUNC_START(do_suspend_lowlevel)
FRAME_BEGIN
subq $8, %rsp
xorl %eax, %eax
@@ -123,7 +125,7 @@ ENTRY(do_suspend_lowlevel)
addq $8, %rsp
FRAME_END
jmp restore_processor_state
-ENDPROC(do_suspend_lowlevel)
+SYM_FUNC_END(do_suspend_lowlevel)
.data
saved_rbp: .quad 0
@@ -134,4 +136,4 @@ saved_rbx: .quad 0
saved_rip: .quad 0
saved_rsp: .quad 0
-ENTRY(saved_magic) .quad 0
+SYM_DATA(saved_magic, .quad 0)
OpenPOWER on IntegriCloud