S3 resume on Fujitsu-Siemens Amilo A7620 (CONTINUES)

DISCUSSION Alberto Piai 3 participants 8 messages Oct 18, 2004 – Oct 27, 2004 7 messages not in the archive ACPI

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Alberto Piai

author

2004-10-18 11:42 UTC #0 lore raw

Please refer to threads "ACPI S3 resume only reboots" and "[PATCH] GDT table patch for resume only reboots problem" for history on this thread. I moved to a new one because was becoming hard to follow.

Properly using beeping code by Pavel I was able to follow the code after

	wakeup_pmode_return:
		movw	$__KERNEL_DS, %ax
		movw	%ax, %ss

and verified that it doesn't hang at that point.

Wakeup works until:
[...]

# and restore the stack ... but you need gdt for this to work
	movl	saved_context_esp, %esp

movl %cs:saved_magic, %eax
cmpl $0x12345678, %eax
jne bogus_magic

# jump to place where we left off
movl saved_eip,%eax
jmp *%eax ###BEFORE THE JMP IT'S STILL ALIVE!
[...]

If i let it enter the jmp, it hangs. How can i follow that jump? Does that mean that we're going out of wakeup.S, finally? That would be a progress.

Current situation is:
with wakeup_addr.patch, wakeup_gdt.patch and

	movl  %cr0, %eax
	andl  $0xfffffff0, %eax # TS/EM/MP bit off	
	movl  %eax, %cr0

placed at the beginning of wakeup code as suggest by Hiroshi 2 Itoh the laptop still doesn't survive pushl $0, that causes reboot. Commenting out pushl $0 and popfl it goes on until the point reported above.

Thanks,
Alberto

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Pavel Machek

2004-10-18 12:47 UTC #2 lore raw

Hi!

Quoted 17 lines

Please refer to threads "ACPI S3 resume only reboots" and "[PATCH] GDT table patch for resume only reboots problem" for history on this thread. I moved to a new one because was becoming hard to follow.
Properly using beeping code by Pavel I was able to follow the code after
	wakeup_pmode_return:
		movw	$__KERNEL_DS, %ax
		movw	%ax, %ss
and verified that it doesn't hang at that point.
Wakeup works until:
[...]
# and restore the stack ... but you need gdt for this to work
	movl	saved_context_esp, %esp
movl %cs:saved_magic, %eax
cmpl $0x12345678, %eax
jne bogus_magic

Quoted 7 lines

# jump to place where we left off
movl saved_eip,%eax
jmp *%eax ###BEFORE THE JMP IT'S STILL ALIVE!
[...]
If i let it enter the jmp, it hangs. How can i follow that jump? Does that mean that we're going out of wakeup.S, finally? That would be a progress.

Yes, you are going out of wakeup.S... Actually no. You are going to ret_point down in do_suspend_lowlevel.

Pavel

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Alberto Piai

author

2004-10-18 20:54 UTC #4 lore raw

Quoted 2 lines · On Mon, 18 Oct 2004 14:47:56 +0200 Pavel Machek…

Yes, you are going out of wakeup.S... Actually no. You are going to ret_point down in do_suspend_lowlevel.

Update: code is executed until
[...]
ENTRY(do_suspend_lowlevel)

	call	save_processor_state
	call	save_registers
	pushl	$3
	call	acpi_enter_sleep_state
	addl	$4,%esp
	ret
	.p2align 4,,7

ret_point:
call restore_registers
call restore_processor_state
# Here it's still alive :)
ret
[...]

So now it's going out of wakeup.S, right?
We should be in drivers/acpi/sleep/main.c at that point [...]
switch (pm_state)

	{
	case PM_SUSPEND_STANDBY:
		barrier();
		status = acpi_enter_sleep_state(acpi_state);
		break;

	case PM_SUSPEND_MEM:
		do_suspend_lowlevel();
		break;

	case PM_SUSPEND_DISK:
		if (acpi_pm_ops.pm_disk_mode == PM_DISK_PLATFORM)
			status = acpi_enter_sleep_state(acpi_state);
		else
			do_suspend_lowlevel_s4bios();
		break;
	default:
		return -EINVAL;
	}
	local_irq_restore(flags);
	printk(KERN_DEBUG "Back to C!\n");

[...]
right?
Can i use some beep code from here as well?
I won't sleep until this laptop resumes! ;)

Alberto

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Pavel Machek

2004-10-18 21:22 UTC #6 lore raw

Hi!

Quoted 13 lines

Quoted 2 lines
Yes, you are going out of wakeup.S... Actually no. You are going to ret_point down in do_suspend_lowlevel.
Update: code is executed until
[...]
ENTRY(do_suspend_lowlevel)
	call	save_processor_state
	call	save_registers
	pushl	$3
	call	acpi_enter_sleep_state
	addl	$4,%esp
	ret
	.p2align 4,,7

Quoted 8 lines

ret_point:
call restore_registers
call restore_processor_state
# Here it's still alive :)
ret
[...]
So now it's going out of wakeup.S, right?

Good.

Quoted 1 line

We should be in drivers/acpi/sleep/main.c at that point

Yes. I assume that video does not work for you? Do you see at least blinking cursor?

...hmm, problem is that normal video calls really require stack. Very bad.

Quoted 20 lines

	case PM_SUSPEND_STANDBY:
		barrier();
		status = acpi_enter_sleep_state(acpi_state);
		break;

	case PM_SUSPEND_MEM:
		do_suspend_lowlevel();
		break;

	case PM_SUSPEND_DISK:
		if (acpi_pm_ops.pm_disk_mode == PM_DISK_PLATFORM)
			status = acpi_enter_sleep_state(acpi_state);
		else
			do_suspend_lowlevel_s4bios();
		break;
	default:
		return -EINVAL;
	}
	local_irq_restore(flags);
	printk(KERN_DEBUG "Back to C!\n");

Quoted 3 lines

[...]
right?
Can i use some beep code from here as well?

You'd have to wrap it with asm("") at least, and need right constraints.... Hmm, this should be C-equivalent. First try it somewhere in normal code.

outb(inb(97), 0x80); outb_p(3, 97); outb_p(-74,67); outb_p(-119,66); outb_p(15,66);

Quoted 1 line

I won't sleep until this laptop resumes! ;)

Given that human can only handle about 72 hours without sleep... I'd say that is bad idea.

Pavel

Signature · 9 lines

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Alberto Piai

author

2004-10-18 22:21 UTC #8 lore raw

Quoted 11 lines · On Mon, 18 Oct 2004 23:22:08 +0200 Pavel Machek…

Quoted 1 line
So now it's going out of wakeup.S, right?
Good.
Quoted 1 line
We should be in drivers/acpi/sleep/main.c at that point
Yes. I assume that video does not work for you? Do you see at least blinking cursor?
...hmm, problem is that normal video calls really require stack. Very bad.

Hey. Some messages ago we got to the point were stack was properly initialized, so i couldn't use pushl anymore to debug. That was on [...]
wakeup_pmode_return:

	movw	$__KERNEL_DS, %ax
	movw	%ax, %ss
	movw	%ax, %ds

[...]

could we try to run video code after that?

[OT]
Ps:ok, maybe i'll go to sleep... but i'm not going to surrender. :p

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Pavel Machek

2004-10-18 23:00 UTC #10 lore raw

Hi!

Quoted 15 lines

Quoted 11 lines
Quoted 1 line
So now it's going out of wakeup.S, right?
Good.
Quoted 1 line
We should be in drivers/acpi/sleep/main.c at that point
Yes. I assume that video does not work for you? Do you see at least blinking cursor?
...hmm, problem is that normal video calls really require stack. Very bad.
Hey. Some messages ago we got to the point were stack was properly initialized, so i couldn't use pushl anymore to debug. That was on [...]
wakeup_pmode_return:

Quoted 6 lines

	movw	$__KERNEL_DS, %ax
	movw	%ax, %ss
	movw	%ax, %ds
[...]
could we try to run video code after that?

We can't call video bios from protected mode, sorry. If machine comes up with all devices working (try capslock) but video, you should be able to reinitialize video using emu from X11 or some other hack.

Pavel

Signature · 9 lines

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Alberto Piai

author

2004-10-27 22:44 UTC #12 lore raw

Quoted 6 lines · On Tue, 19 Oct 2004 01:00:08 +0200 Pavel Machek…

Hi!
Quoted 4 lines
Quoted 4 lines
Quoted 3 lines
So now it's going out of wakeup.S, right?
We should be in drivers/acpi/sleep/main.c at that point

Quoted 7 lines

Quoted 3 lines
Quoted 3 lines
Yes. I assume that video does not work for you? Do you see at least blinking cursor?
We can't call video bios from protected mode, sorry. If machine comes up with all devices working (try capslock) but video, you should be able to reinitialize video using emu from X11 or some other hack.

Update:
2.6.9, with pushl and popl lines commented out:
the machine survives wakeup.S, then hangs with the hard disk light on. CapsLock is working, but Ctrl+Alt+Del doesn't reboot (if i keep it pressed for some seconds it generates a beep.)

I still didn't find a way to debug it, please help me! At which point should we be if harddisk was (kind of) turned on?

Thanks,
Alberto

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Pavel Machek

2004-10-27 23:47 UTC #14 lore raw

Hi!

Quoted 12 lines

Quoted 11 lines
Quoted 7 lines
Quoted 7 lines
Quoted 3 lines
So now it's going out of wakeup.S, right?
We should be in drivers/acpi/sleep/main.c at that point
Yes. I assume that video does not work for you? Do you see at least blinking cursor?
We can't call video bios from protected mode, sorry. If machine comes up with all devices working (try capslock) but video, you should be able to reinitialize video using emu from X11 or some other hack.

Quoted 5 lines

Update:
2.6.9, with pushl and popl lines commented out:
the machine survives wakeup.S, then hangs with the hard disk light on. CapsLock is working, but Ctrl+Alt+Del doesn't reboot (if i keep it pressed for some seconds it generates a beep.)
I still didn't find a way to debug it, please help me! At which point should we be if harddisk was (kind of) turned on?

Remap capslock to, say, right shift, and try to see if right shift toggles leds after resume.

If it does, try to find out if serial or network card is working after resume.

Pavel

Signature · 9 lines

People were complaining that M$ turns users into beta-testers...
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