x86/kernel/apm_32.c

40  *    0.9: only call bios if bios is present, Linux 1.3.72
58  *         across BIOS call).
246  *	    [no-]broken[-_]psr		BIOS has a broken GetPowerStatus call
280  * Define as 1 to make the driver always call the APM BIOS busy
515  * DS can be zeroed before the call. Unfortunately, we can't do anything
575  *	__apm_bios_call - Make an APM BIOS 32bit call
578  *	Make an APM call using the 32bit protected mode interface. The
580  *	enabled. This call can disable interrupts for a long period of
586  *	Note: this makes the call on the current CPU.
595 	struct apm_bios_call	*call = _call;
608 	apm_bios_call_asm(call->func, call->ebx, call->ecx,
609 			  &call->eax, &call->ebx, &call->ecx, &call->edx,
610 			  &call->esi);
618 	return call->eax & 0xff;
622 static int on_cpu0(long (*fn)(void *), struct apm_bios_call *call)
629 		ret = fn(call);
633 		ret = work_on_cpu(0, fn, call);
638 		call->err = ret;
640 		call->err = (call->eax >> 8) & 0xff;
646  *	apm_bios_call	-	Make an APM BIOS 32bit call (on CPU 0)
647  *	@call: the apm_bios_call registers.
649  *	If there is an error, it is returned in @call.err.
651 static int apm_bios_call(struct apm_bios_call *call)
653 	return on_cpu0(__apm_bios_call, call);
657  *	__apm_bios_call_simple - Make an APM BIOS 32bit call (on CPU 0)
660  *	Make a BIOS call that returns one value only, or just status.
664  *	This call may hold interrupts off for a long time on some laptops.
666  *	Note: this makes the call on the current CPU.
676 	struct apm_bios_call	*call = _call;
689 	error = apm_bios_call_simple_asm(call->func, call->ebx, call->ecx,
690 					 &call->eax);
701  *	apm_bios_call_simple	-	make a simple APM BIOS 32bit call
703  *	@ebx_in: EBX register value for BIOS call
704  *	@ecx_in: ECX register value for BIOS call
705  *	@eax: EAX register on return from the BIOS call
708  *	Make a BIOS call that returns one value only, or just status.
711  *	BIOS operations.  This call may hold interrupts off for a long
717 	struct apm_bios_call call;
720 	call.func = func;
721 	call.ebx = ebx_in;
722 	call.ecx = ecx_in;
724 	ret = on_cpu0(__apm_bios_call_simple, &call);
725 	*eax = call.eax;
726 	*err = call.err;
775 	struct apm_bios_call call;
777 	call.func = APM_FUNC_GET_EVENT;
778 	call.ebx = call.ecx = 0;
780 	if (apm_bios_call(&call))
781 		return call.err;
783 	*event = call.ebx;
787 		*info = call.ecx;
886  * the CPU for some time, we want to call BIOS
977  *	the SMP call on CPU0 as some systems will only honour this call
1035 	struct apm_bios_call call;
1037 	call.func = APM_FUNC_GET_STATUS;
1038 	call.ebx = APM_DEVICE_ALL;
1039 	call.ecx = 0;
1043 	if (apm_bios_call(&call)) {
1044 		if (!call.err)
1046 		return call.err;
1048 	*status = call.ebx;
1049 	*bat = call.ecx;
1051 		*life = swab16((u16)call.edx);
1054 		*life = call.edx;
1636 	   from the Get Power Status (0x0a) call unless otherwise noted.
1731 		 * This call causes my NEC UltraLite Versa 33/C to hang if it
2397 MODULE_PARM_DESC(broken_psr, "BIOS has a broken GetPowerStatus call");