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| author | Nigel Cunningham <nigel@nigel.suspend2.net> | 2007-07-19 01:47:41 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-19 10:04:43 -0700 |
| commit | 5a60d6235c8352ade8f2699e72fcdfe853730456 (patch) | |
| tree | cafab638df562b912e9e2a653e5c7238816d9706 /arch/x86_64/kernel/acpi | |
| parent | bd804eba1c8597cbb7cd5a5f9fe886aae16a079a (diff) | |
| download | linux-5a60d6235c8352ade8f2699e72fcdfe853730456.tar.gz linux-5a60d6235c8352ade8f2699e72fcdfe853730456.tar.bz2 linux-5a60d6235c8352ade8f2699e72fcdfe853730456.zip | |
PM: Optional beeping during resume from suspend to RAM
Add a feature allowing the user to make the system beep during a resume from
suspend to RAM, on x86_64 and i386.
This is useful for the users with broken resume from RAM, so that they can
verify if the control reaches the kernel after a wake-up event.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/x86_64/kernel/acpi')
| -rw-r--r-- | arch/x86_64/kernel/acpi/wakeup.S | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/arch/x86_64/kernel/acpi/wakeup.S b/arch/x86_64/kernel/acpi/wakeup.S index 8550a6ffa275..ed63d1845792 100644 --- a/arch/x86_64/kernel/acpi/wakeup.S +++ b/arch/x86_64/kernel/acpi/wakeup.S @@ -16,6 +16,21 @@ # cs = 0x1234, eip = 0x05 # +#define BEEP \ + inb $97, %al; \ + outb %al, $0x80; \ + movb $3, %al; \ + outb %al, $97; \ + outb %al, $0x80; \ + movb $-74, %al; \ + outb %al, $67; \ + outb %al, $0x80; \ + movb $-119, %al; \ + outb %al, $66; \ + outb %al, $0x80; \ + movb $15, %al; \ + outb %al, $66; + ALIGN .align 16 @@ -33,6 +48,13 @@ wakeup_code: movw %cs, %ax movw %ax, %ds # Make ds:0 point to wakeup_start movw %ax, %ss + + # Data segment must be set up before we can see whether to beep. + testl $1, beep_flags - wakeup_code + jz 1f + BEEP +1: + # Private stack is needed for ASUS board mov $(wakeup_stack - wakeup_code), %sp @@ -229,6 +251,7 @@ gdt_48a: .long gdta - wakeup_code # gdt base (relocated in later) real_magic: .quad 0 +beep_flags: .quad 0 video_mode: .quad 0 video_flags: .quad 0 @@ -344,6 +367,8 @@ ENTRY(acpi_copy_wakeup_routine) pushq %rax pushq %rdx + movl s2ram_beep, %edx + movl %edx, beep_flags - wakeup_start (,%rdi) movl saved_video_mode, %edx movl %edx, video_mode - wakeup_start (,%rdi) movl acpi_video_flags, %edx |