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Conflicts: src/config/general.h src/net/netdev_settings.c src/net/tcp.c
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/* | ||
* Copyright (C) 2013 Marin Hannache <ipxe@mareo.fr>. | ||
* | ||
* This program is free software; you can redistribute it and/or | ||
* modify it under the terms of the GNU General Public License as | ||
* published by the Free Software Foundation; either version 2 of the | ||
* License, or any later version. | ||
* | ||
* This program is distributed in the hope that it will be useful, but | ||
* WITHOUT ANY WARRANTY; without even the implied warranty of | ||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
* General Public License for more details. | ||
* | ||
* You should have received a copy of the GNU General Public License | ||
* along with this program; if not, write to the Free Software | ||
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | ||
* 02110-1301, USA. | ||
*/ | ||
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FILE_LICENCE ( GPL2_OR_LATER ); | ||
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/** | ||
* @file | ||
* | ||
* Advanced Power Management | ||
* | ||
*/ | ||
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#include <errno.h> | ||
#include <realmode.h> | ||
#include <ipxe/reboot.h> | ||
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/** | ||
* Power off the computer using APM | ||
* | ||
* @ret rc Return status code | ||
*/ | ||
static int apm_poweroff ( void ) { | ||
uint16_t apm_version; | ||
uint16_t apm_signature; | ||
uint16_t apm_flags; | ||
uint16_t carry; | ||
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/* APM check */ | ||
__asm__ __volatile__ ( REAL_CODE ( "int $0x15\n\t" | ||
"adc %%edx,0\n\t" ) | ||
: "=a" ( apm_version ), "=b" ( apm_signature ), | ||
"=c" ( apm_flags ), "=d" ( carry ) | ||
: "a" ( 0x5300 ), "b" ( 0x0000 ), | ||
"d" ( 0x0000 ) ); | ||
if ( carry ) { | ||
DBG ( "APM not present\n" ); | ||
return -ENOTSUP; | ||
} | ||
if ( apm_signature != 0x504d ) { /* signature 'PM' */ | ||
DBG ( "APM not present\n" ); | ||
return -ENOTSUP; | ||
} | ||
if ( apm_version < 0x0101 ) { /* Need version 1.1+ */ | ||
DBG ( "APM 1.1+ not supported\n" ); | ||
return -ENOTSUP; | ||
} | ||
if ( ( apm_flags & 0x8 ) == 0x8 ) { | ||
DBG ( "APM power management disabled\n" ); | ||
return -EPERM; | ||
} | ||
DBG2 ( "APM check completed\n" ); | ||
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/* APM initialisation */ | ||
__asm__ __volatile__ ( REAL_CODE ( "int $0x15\n\t" | ||
"adc %%edx,0\n\t" ) | ||
: "=d" ( carry ) | ||
: "a" ( 0x5301 ), "b" ( 0x0000 ), | ||
"d" ( 0x0000 ) ); | ||
if ( carry ) { | ||
DBG ( "APM initialisation failed\n" ); | ||
return -EIO; | ||
} | ||
DBG2 ( "APM initialisation completed\n" ); | ||
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/* Set APM driver version */ | ||
__asm__ __volatile__ ( REAL_CODE ( "int $0x15\n\t" | ||
"adc %%edx,0\n\t" ) | ||
: "=d" ( carry ) | ||
: "a" ( 0x530e ), "b" ( 0x0000 ), | ||
"c" ( 0x0101 ), "d" ( 0x0000 ) ); | ||
if ( carry ) { | ||
DBG ( "APM setting driver version failed\n" ); | ||
return -EIO; | ||
} | ||
DBG2 ( "APM driver version set\n" ); | ||
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/* Setting power state to off */ | ||
__asm__ __volatile__ ( REAL_CODE ( "int $0x15\n\t" | ||
"adc %%edx,0\n\t" ) | ||
: "=d" ( carry ) | ||
: "a" ( 0x5307 ), "b" ( 0x0001 ), | ||
"c" ( 0x0003 ), "d" ( 0x0000) ); | ||
if ( carry ) { | ||
DBG ( "APM setting power state failed\n" ); | ||
return -ENOTTY; | ||
} | ||
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/* Should never happen */ | ||
return -ECANCELED; | ||
} | ||
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PROVIDE_REBOOT ( pcbios, poweroff, apm_poweroff ); |
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