[acpi] Add support for ACPI power off
Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
parent
74222cd2c1
commit
e19c0a8fd2
|
|
@ -4,6 +4,7 @@
|
|||
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
|
||||
|
||||
#define BDA_SEG 0x0040
|
||||
#define BDA_EBDA 0x000e
|
||||
#define BDA_EQUIPMENT_WORD 0x0010
|
||||
#define BDA_FBMS 0x0013
|
||||
#define BDA_REBOOT 0x0072
|
||||
|
|
|
|||
|
|
@ -24,6 +24,7 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
|
|||
#define ERRFILE_int13con ( ERRFILE_ARCH | ERRFILE_CORE | 0x000d0000 )
|
||||
#define ERRFILE_gdbmach ( ERRFILE_ARCH | ERRFILE_CORE | 0x000e0000 )
|
||||
#define ERRFILE_rtc_entropy ( ERRFILE_ARCH | ERRFILE_CORE | 0x000f0000 )
|
||||
#define ERRFILE_acpipwr ( ERRFILE_ARCH | ERRFILE_CORE | 0x00100000 )
|
||||
|
||||
#define ERRFILE_bootsector ( ERRFILE_ARCH | ERRFILE_IMAGE | 0x00000000 )
|
||||
#define ERRFILE_bzimage ( ERRFILE_ARCH | ERRFILE_IMAGE | 0x00010000 )
|
||||
|
|
|
|||
|
|
@ -0,0 +1,14 @@
|
|||
#ifndef _IPXE_ACPIPWR_H
|
||||
#define _IPXE_ACPIPWR_H
|
||||
|
||||
/** @file
|
||||
*
|
||||
* ACPI power off
|
||||
*
|
||||
*/
|
||||
|
||||
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
|
||||
|
||||
extern int acpi_poweroff ( void );
|
||||
|
||||
#endif /* _IPXE_ACPIPWR_H */
|
||||
|
|
@ -0,0 +1,14 @@
|
|||
#ifndef _IPXE_APM_H
|
||||
#define _IPXE_APM_H
|
||||
|
||||
/** @file
|
||||
*
|
||||
* Advanced Power Management
|
||||
*
|
||||
*/
|
||||
|
||||
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
|
||||
|
||||
extern int apm_poweroff ( void );
|
||||
|
||||
#endif /* _IPXE_APM_H */
|
||||
|
|
@ -0,0 +1,116 @@
|
|||
/*
|
||||
* Copyright (C) 2016 Michael Brown <mbrown@fensystems.co.uk>.
|
||||
*
|
||||
* 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.
|
||||
*
|
||||
* You can also choose to distribute this program under the terms of
|
||||
* the Unmodified Binary Distribution Licence (as given in the file
|
||||
* COPYING.UBDL), provided that you have satisfied its requirements.
|
||||
*/
|
||||
|
||||
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
|
||||
|
||||
#include <errno.h>
|
||||
#include <byteswap.h>
|
||||
#include <realmode.h>
|
||||
#include <bios.h>
|
||||
#include <ipxe/io.h>
|
||||
#include <ipxe/acpi.h>
|
||||
#include <ipxe/acpipwr.h>
|
||||
|
||||
/** @file
|
||||
*
|
||||
* ACPI power off
|
||||
*
|
||||
*/
|
||||
|
||||
/** Colour for debug messages */
|
||||
#define colour FADT_SIGNATURE
|
||||
|
||||
/** _S5_ signature */
|
||||
#define S5_SIGNATURE ACPI_SIGNATURE ( '_', 'S', '5', '_' )
|
||||
|
||||
/**
|
||||
* Power off the computer using ACPI
|
||||
*
|
||||
* @ret rc Return status code
|
||||
*/
|
||||
int acpi_poweroff ( void ) {
|
||||
struct acpi_fadt fadtab;
|
||||
uint16_t ebda;
|
||||
userptr_t rsdt;
|
||||
userptr_t fadt;
|
||||
unsigned int pm1a_cnt_blk;
|
||||
unsigned int pm1b_cnt_blk;
|
||||
unsigned int pm1a_cnt;
|
||||
unsigned int pm1b_cnt;
|
||||
unsigned int slp_typa;
|
||||
unsigned int slp_typb;
|
||||
int s5;
|
||||
int rc;
|
||||
|
||||
/* Locate EBDA */
|
||||
get_real ( ebda, BDA_SEG, BDA_EBDA );
|
||||
|
||||
/* Locate RSDT */
|
||||
rsdt = acpi_find_rsdt ( real_to_user ( ebda, 0 ) );
|
||||
if ( ! rsdt ) {
|
||||
DBGC ( colour, "ACPI could not find RSDT (EBDA %04x)\n", ebda );
|
||||
return -ENOENT;
|
||||
}
|
||||
|
||||
/* Locate FADT */
|
||||
fadt = acpi_find ( rsdt, FADT_SIGNATURE, 0 );
|
||||
if ( ! fadt ) {
|
||||
DBGC ( colour, "ACPI could not find FADT\n" );
|
||||
return -ENOENT;
|
||||
}
|
||||
|
||||
/* Read FADT */
|
||||
copy_from_user ( &fadtab, fadt, 0, sizeof ( fadtab ) );
|
||||
pm1a_cnt_blk = le32_to_cpu ( fadtab.pm1a_cnt_blk );
|
||||
pm1b_cnt_blk = le32_to_cpu ( fadtab.pm1b_cnt_blk );
|
||||
pm1a_cnt = ( pm1a_cnt_blk + ACPI_PM1_CNT );
|
||||
pm1b_cnt = ( pm1b_cnt_blk + ACPI_PM1_CNT );
|
||||
|
||||
/* Extract \_S5 from DSDT or any SSDT */
|
||||
s5 = acpi_sx ( rsdt, S5_SIGNATURE );
|
||||
if ( s5 < 0 ) {
|
||||
rc = s5;
|
||||
DBGC ( colour, "ACPI could not extract \\_S5: %s\n",
|
||||
strerror ( rc ) );
|
||||
return rc;
|
||||
}
|
||||
|
||||
/* Power off system */
|
||||
if ( pm1a_cnt_blk ) {
|
||||
slp_typa = ( ( s5 >> 0 ) & 0xff );
|
||||
DBGC ( colour, "ACPI PM1a sleep type %#x => %04x\n",
|
||||
slp_typa, pm1a_cnt );
|
||||
outw ( ( ACPI_PM1_CNT_SLP_TYP ( slp_typa ) |
|
||||
ACPI_PM1_CNT_SLP_EN ), pm1a_cnt );
|
||||
}
|
||||
if ( pm1b_cnt_blk ) {
|
||||
slp_typb = ( ( s5 >> 8 ) & 0xff );
|
||||
DBGC ( colour, "ACPI PM1b sleep type %#x => %04x\n",
|
||||
slp_typb, pm1b_cnt );
|
||||
outw ( ( ACPI_PM1_CNT_SLP_TYP ( slp_typb ) |
|
||||
ACPI_PM1_CNT_SLP_EN ), pm1b_cnt );
|
||||
}
|
||||
|
||||
DBGC ( colour, "ACPI power off failed\n" );
|
||||
return -EPROTO;
|
||||
}
|
||||
|
|
@ -32,14 +32,14 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
|
|||
|
||||
#include <errno.h>
|
||||
#include <realmode.h>
|
||||
#include <ipxe/reboot.h>
|
||||
#include <ipxe/apm.h>
|
||||
|
||||
/**
|
||||
* Power off the computer using APM
|
||||
*
|
||||
* @ret rc Return status code
|
||||
*/
|
||||
static int apm_poweroff ( void ) {
|
||||
int apm_poweroff ( void ) {
|
||||
uint16_t apm_version;
|
||||
uint16_t apm_signature;
|
||||
uint16_t apm_flags;
|
||||
|
|
@ -108,5 +108,3 @@ static int apm_poweroff ( void ) {
|
|||
/* Should never happen */
|
||||
return -ECANCELED;
|
||||
}
|
||||
|
||||
PROVIDE_REBOOT ( pcbios, poweroff, apm_poweroff );
|
||||
|
|
|
|||
|
|
@ -32,6 +32,8 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
|
|||
#include <ipxe/reboot.h>
|
||||
#include <realmode.h>
|
||||
#include <bios.h>
|
||||
#include <ipxe/apm.h>
|
||||
#include <ipxe/acpipwr.h>
|
||||
|
||||
/**
|
||||
* Reboot system
|
||||
|
|
@ -49,4 +51,24 @@ static void bios_reboot ( int warm ) {
|
|||
__asm__ __volatile__ ( REAL_CODE ( "ljmp $0xf000, $0xfff0" ) );
|
||||
}
|
||||
|
||||
/**
|
||||
* Power off system
|
||||
*
|
||||
* @ret rc Return status code
|
||||
*/
|
||||
static int bios_poweroff ( void ) {
|
||||
int rc;
|
||||
|
||||
/* Try APM */
|
||||
if ( ( rc = apm_poweroff() ) != 0 )
|
||||
DBG ( "APM power off failed: %s\n", strerror ( rc ) );
|
||||
|
||||
/* Try ACPI */
|
||||
if ( ( rc = acpi_poweroff() ) != 0 )
|
||||
DBG ( "ACPI power off failed: %s\n", strerror ( rc ) );
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
||||
PROVIDE_REBOOT ( pcbios, reboot, bios_reboot );
|
||||
PROVIDE_REBOOT ( pcbios, poweroff, bios_poweroff );
|
||||
|
|
|
|||
274
src/core/acpi.c
274
src/core/acpi.c
|
|
@ -24,6 +24,8 @@
|
|||
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
|
||||
|
||||
#include <errno.h>
|
||||
#include <byteswap.h>
|
||||
#include <ipxe/uaccess.h>
|
||||
#include <ipxe/acpi.h>
|
||||
#include <ipxe/interface.h>
|
||||
|
||||
|
|
@ -40,6 +42,22 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
|
|||
******************************************************************************
|
||||
*/
|
||||
|
||||
/**
|
||||
* Transcribe ACPI table signature (for debugging)
|
||||
*
|
||||
* @v signature ACPI table signature
|
||||
* @ret name ACPI table signature name
|
||||
*/
|
||||
static const char * acpi_name ( uint32_t signature ) {
|
||||
static union {
|
||||
uint32_t signature;
|
||||
char name[5];
|
||||
} u;
|
||||
|
||||
u.signature = cpu_to_le32 ( signature );
|
||||
return u.name;
|
||||
}
|
||||
|
||||
/**
|
||||
* Fix up ACPI table checksum
|
||||
*
|
||||
|
|
@ -55,6 +73,262 @@ void acpi_fix_checksum ( struct acpi_description_header *acpi ) {
|
|||
acpi->checksum -= sum;
|
||||
}
|
||||
|
||||
/**
|
||||
* Locate ACPI root system description table within a memory range
|
||||
*
|
||||
* @v start Start address to search
|
||||
* @v len Length to search
|
||||
* @ret rsdt ACPI root system description table, or UNULL
|
||||
*/
|
||||
static userptr_t acpi_find_rsdt_range ( userptr_t start, size_t len ) {
|
||||
static const char signature[8] = RSDP_SIGNATURE;
|
||||
struct acpi_rsdp rsdp;
|
||||
userptr_t rsdt;
|
||||
size_t offset;
|
||||
uint8_t sum;
|
||||
unsigned int i;
|
||||
|
||||
/* Search for RSDP */
|
||||
for ( offset = 0 ; ( ( offset + sizeof ( rsdp ) ) < len ) ;
|
||||
offset += RSDP_STRIDE ) {
|
||||
|
||||
/* Check signature and checksum */
|
||||
copy_from_user ( &rsdp, start, offset, sizeof ( rsdp ) );
|
||||
if ( memcmp ( rsdp.signature, signature,
|
||||
sizeof ( signature ) ) != 0 )
|
||||
continue;
|
||||
for ( sum = 0, i = 0 ; i < sizeof ( rsdp ) ; i++ )
|
||||
sum += *( ( ( uint8_t * ) &rsdp ) + i );
|
||||
if ( sum != 0 )
|
||||
continue;
|
||||
|
||||
/* Extract RSDT */
|
||||
rsdt = phys_to_user ( le32_to_cpu ( rsdp.rsdt ) );
|
||||
DBGC ( rsdt, "RSDT %#08lx found via RSDP %#08lx\n",
|
||||
user_to_phys ( rsdt, 0 ),
|
||||
user_to_phys ( start, offset ) );
|
||||
return rsdt;
|
||||
}
|
||||
|
||||
return UNULL;
|
||||
}
|
||||
|
||||
/**
|
||||
* Locate ACPI root system description table
|
||||
*
|
||||
* @v ebda Extended BIOS data area, or UNULL
|
||||
* @ret rsdt ACPI root system description table, or UNULL
|
||||
*/
|
||||
userptr_t acpi_find_rsdt ( userptr_t ebda ) {
|
||||
userptr_t rsdt;
|
||||
|
||||
/* Search EBDA, if applicable */
|
||||
if ( ebda ) {
|
||||
rsdt = acpi_find_rsdt_range ( ebda, RSDP_EBDA_LEN );
|
||||
if ( rsdt )
|
||||
return rsdt;
|
||||
}
|
||||
|
||||
/* Search fixed BIOS area */
|
||||
rsdt = acpi_find_rsdt_range ( phys_to_user ( RSDP_BIOS_START ),
|
||||
RSDP_BIOS_LEN );
|
||||
if ( rsdt )
|
||||
return rsdt;
|
||||
|
||||
return UNULL;
|
||||
}
|
||||
|
||||
/**
|
||||
* Locate ACPI table
|
||||
*
|
||||
* @v rsdt ACPI root system description table
|
||||
* @v signature Requested table signature
|
||||
* @v index Requested index of table with this signature
|
||||
* @ret table Table, or UNULL if not found
|
||||
*/
|
||||
userptr_t acpi_find ( userptr_t rsdt, uint32_t signature, unsigned int index ) {
|
||||
struct acpi_description_header acpi;
|
||||
struct acpi_rsdt *rsdtab;
|
||||
typeof ( rsdtab->entry[0] ) entry;
|
||||
userptr_t table;
|
||||
size_t len;
|
||||
unsigned int count;
|
||||
unsigned int i;
|
||||
|
||||
/* Read RSDT header */
|
||||
copy_from_user ( &acpi, rsdt, 0, sizeof ( acpi ) );
|
||||
if ( acpi.signature != cpu_to_le32 ( RSDT_SIGNATURE ) ) {
|
||||
DBGC ( rsdt, "RSDT %#08lx has invalid signature:\n",
|
||||
user_to_phys ( rsdt, 0 ) );
|
||||
DBGC_HDA ( rsdt, user_to_phys ( rsdt, 0 ), &acpi,
|
||||
sizeof ( acpi ) );
|
||||
return UNULL;
|
||||
}
|
||||
len = le32_to_cpu ( acpi.length );
|
||||
if ( len < sizeof ( rsdtab->acpi ) ) {
|
||||
DBGC ( rsdt, "RSDT %#08lx has invalid length:\n",
|
||||
user_to_phys ( rsdt, 0 ) );
|
||||
DBGC_HDA ( rsdt, user_to_phys ( rsdt, 0 ), &acpi,
|
||||
sizeof ( acpi ) );
|
||||
return UNULL;
|
||||
}
|
||||
|
||||
/* Calculate number of entries */
|
||||
count = ( ( len - sizeof ( rsdtab->acpi ) ) / sizeof ( entry ) );
|
||||
|
||||
/* Search through entries */
|
||||
for ( i = 0 ; i < count ; i++ ) {
|
||||
|
||||
/* Get table address */
|
||||
copy_from_user ( &entry, rsdt,
|
||||
offsetof ( typeof ( *rsdtab ), entry[i] ),
|
||||
sizeof ( entry ) );
|
||||
|
||||
/* Read table header */
|
||||
table = phys_to_user ( entry );
|
||||
copy_from_user ( &acpi.signature, table, 0,
|
||||
sizeof ( acpi.signature ) );
|
||||
|
||||
/* Check table signature */
|
||||
if ( acpi.signature != cpu_to_le32 ( signature ) )
|
||||
continue;
|
||||
|
||||
/* Check index */
|
||||
if ( index-- )
|
||||
continue;
|
||||
|
||||
DBGC ( rsdt, "RSDT %#08lx found %s at %08lx\n",
|
||||
user_to_phys ( rsdt, 0 ), acpi_name ( signature ),
|
||||
user_to_phys ( table, 0 ) );
|
||||
return table;
|
||||
}
|
||||
|
||||
DBGC ( rsdt, "RSDT %#08lx could not find %s\n",
|
||||
user_to_phys ( rsdt, 0 ), acpi_name ( signature ) );
|
||||
return UNULL;
|
||||
}
|
||||
|
||||
/**
|
||||
* Extract \_Sx value from DSDT/SSDT
|
||||
*
|
||||
* @v zsdt DSDT or SSDT
|
||||
* @v signature Signature (e.g. "_S5_")
|
||||
* @ret sx \_Sx value, or negative error
|
||||
*
|
||||
* In theory, extracting the \_Sx value from the DSDT/SSDT requires a
|
||||
* full ACPI parser plus some heuristics to work around the various
|
||||
* broken encodings encountered in real ACPI implementations.
|
||||
*
|
||||
* In practice, we can get the same result by scanning through the
|
||||
* DSDT/SSDT for the signature (e.g. "_S5_"), extracting the first
|
||||
* four bytes, removing any bytes with bit 3 set, and treating
|
||||
* whatever is left as a little-endian value. This is one of the
|
||||
* uglier hacks I have ever implemented, but it's still prettier than
|
||||
* the ACPI specification itself.
|
||||
*/
|
||||
static int acpi_sx_zsdt ( userptr_t zsdt, uint32_t signature ) {
|
||||
struct acpi_description_header acpi;
|
||||
union {
|
||||
uint32_t dword;
|
||||
uint8_t byte[4];
|
||||
} buf;
|
||||
size_t offset;
|
||||
size_t len;
|
||||
unsigned int sx;
|
||||
uint8_t *byte;
|
||||
|
||||
/* Read table header */
|
||||
copy_from_user ( &acpi, zsdt, 0, sizeof ( acpi ) );
|
||||
len = le32_to_cpu ( acpi.length );
|
||||
|
||||
/* Locate signature */
|
||||
for ( offset = sizeof ( acpi ) ;
|
||||
( ( offset + sizeof ( buf ) /* signature */ + 3 /* pkg header */
|
||||
+ sizeof ( buf ) /* value */ ) < len ) ;
|
||||
offset++ ) {
|
||||
|
||||
/* Check signature */
|
||||
copy_from_user ( &buf, zsdt, offset, sizeof ( buf ) );
|
||||
if ( buf.dword != cpu_to_le32 ( signature ) )
|
||||
continue;
|
||||
DBGC ( zsdt, "DSDT/SSDT %#08lx found %s at offset %#zx\n",
|
||||
user_to_phys ( zsdt, 0 ), acpi_name ( signature ),
|
||||
offset );
|
||||
offset += sizeof ( buf );
|
||||
|
||||
/* Read first four bytes of value */
|
||||
copy_from_user ( &buf, zsdt, ( offset + 3 /* pkg header */ ),
|
||||
sizeof ( buf ) );
|
||||
DBGC ( zsdt, "DSDT/SSDT %#08lx found %s containing "
|
||||
"%02x:%02x:%02x:%02x\n", user_to_phys ( zsdt, 0 ),
|
||||
acpi_name ( signature ), buf.byte[0], buf.byte[1],
|
||||
buf.byte[2], buf.byte[3] );
|
||||
|
||||
/* Extract \Sx value. There are three potential
|
||||
* encodings that we might encounter:
|
||||
*
|
||||
* - SLP_TYPa, SLP_TYPb, rsvd, rsvd
|
||||
*
|
||||
* - <byteprefix>, SLP_TYPa, <byteprefix>, SLP_TYPb, ...
|
||||
*
|
||||
* - <dwordprefix>, SLP_TYPa, SLP_TYPb, 0, 0
|
||||
*
|
||||
* Since <byteprefix> and <dwordprefix> both have bit
|
||||
* 3 set, and valid SLP_TYPx must have bit 3 clear
|
||||
* (since SLP_TYPx is a 3-bit field), we can just skip
|
||||
* any bytes with bit 3 set.
|
||||
*/
|
||||
byte = &buf.byte[0];
|
||||
if ( *byte & 0x08 )
|
||||
byte++;
|
||||
sx = *(byte++);
|
||||
if ( *byte & 0x08 )
|
||||
byte++;
|
||||
sx |= ( *byte << 8 );
|
||||
return sx;
|
||||
}
|
||||
|
||||
return -ENOENT;
|
||||
}
|
||||
|
||||
/**
|
||||
* Extract \_Sx value from DSDT/SSDT
|
||||
*
|
||||
* @v rsdt ACPI root system description table
|
||||
* @v signature Signature (e.g. "_S5_")
|
||||
* @ret sx \_Sx value, or negative error
|
||||
*/
|
||||
int acpi_sx ( userptr_t rsdt, uint32_t signature ) {
|
||||
struct acpi_fadt fadtab;
|
||||
userptr_t fadt;
|
||||
userptr_t dsdt;
|
||||
userptr_t ssdt;
|
||||
unsigned int i;
|
||||
int sx;
|
||||
|
||||
/* Try DSDT first */
|
||||
fadt = acpi_find ( rsdt, FADT_SIGNATURE, 0 );
|
||||
if ( fadt ) {
|
||||
copy_from_user ( &fadtab, fadt, 0, sizeof ( fadtab ) );
|
||||
dsdt = phys_to_user ( fadtab.dsdt );
|
||||
if ( ( sx = acpi_sx_zsdt ( dsdt, signature ) ) >= 0 )
|
||||
return sx;
|
||||
}
|
||||
|
||||
/* Try all SSDTs */
|
||||
for ( i = 0 ; ; i++ ) {
|
||||
ssdt = acpi_find ( rsdt, SSDT_SIGNATURE, i );
|
||||
if ( ! ssdt )
|
||||
break;
|
||||
if ( ( sx = acpi_sx_zsdt ( ssdt, signature ) ) >= 0 )
|
||||
return sx;
|
||||
}
|
||||
|
||||
DBGC ( rsdt, "RSDT %#08lx could not find \\_Sx \"%s\"\n",
|
||||
user_to_phys ( rsdt, 0 ), acpi_name ( signature ) );
|
||||
return -ENOENT;
|
||||
}
|
||||
|
||||
/******************************************************************************
|
||||
*
|
||||
* Interface methods
|
||||
|
|
|
|||
|
|
@ -11,6 +11,7 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
|
|||
|
||||
#include <stdint.h>
|
||||
#include <ipxe/interface.h>
|
||||
#include <ipxe/uaccess.h>
|
||||
|
||||
/**
|
||||
* An ACPI description header
|
||||
|
|
@ -51,6 +52,76 @@ struct acpi_description_header {
|
|||
#define ACPI_SIGNATURE( a, b, c, d ) \
|
||||
( ( (a) << 0 ) | ( (b) << 8 ) | ( (c) << 16 ) | ( (d) << 24 ) )
|
||||
|
||||
/** Root System Description Pointer signature */
|
||||
#define RSDP_SIGNATURE { 'R', 'S', 'D', ' ', 'P', 'T', 'R', ' ' }
|
||||
|
||||
/** Root System Description Pointer */
|
||||
struct acpi_rsdp {
|
||||
/** Signature */
|
||||
char signature[8];
|
||||
/** To make sum of entire table == 0 */
|
||||
uint8_t checksum;
|
||||
/** OEM identification */
|
||||
char oem_id[6];
|
||||
/** Revision */
|
||||
uint8_t revision;
|
||||
/** Physical address of RSDT */
|
||||
uint32_t rsdt;
|
||||
} __attribute__ (( packed ));
|
||||
|
||||
/** EBDA RSDP length */
|
||||
#define RSDP_EBDA_LEN 0x400
|
||||
|
||||
/** Fixed BIOS area RSDP start address */
|
||||
#define RSDP_BIOS_START 0xe0000
|
||||
|
||||
/** Fixed BIOS area RSDP length */
|
||||
#define RSDP_BIOS_LEN 0x20000
|
||||
|
||||
/** Stride at which to search for RSDP */
|
||||
#define RSDP_STRIDE 16
|
||||
|
||||
/** Root System Description Table (RSDT) signature */
|
||||
#define RSDT_SIGNATURE ACPI_SIGNATURE ( 'R', 'S', 'D', 'T' )
|
||||
|
||||
/** ACPI Root System Description Table (RSDT) */
|
||||
struct acpi_rsdt {
|
||||
/** ACPI header */
|
||||
struct acpi_description_header acpi;
|
||||
/** ACPI table entries */
|
||||
uint32_t entry[0];
|
||||
} __attribute__ (( packed ));
|
||||
|
||||
/** Fixed ACPI Description Table (FADT) signature */
|
||||
#define FADT_SIGNATURE ACPI_SIGNATURE ( 'F', 'A', 'C', 'P' )
|
||||
|
||||
/** Fixed ACPI Description Table (FADT) */
|
||||
struct acpi_fadt {
|
||||
/** ACPI header */
|
||||
struct acpi_description_header acpi;
|
||||
/** Physical address of FACS */
|
||||
uint32_t facs;
|
||||
/** Physical address of DSDT */
|
||||
uint32_t dsdt;
|
||||
/** Unused by iPXE */
|
||||
uint8_t unused[20];
|
||||
/** PM1a Control Register Block */
|
||||
uint32_t pm1a_cnt_blk;
|
||||
/** PM1b Control Register Block */
|
||||
uint32_t pm1b_cnt_blk;
|
||||
} __attribute__ (( packed ));
|
||||
|
||||
/** ACPI PM1 Control Register (within PM1a_CNT_BLK or PM1A_CNT_BLK) */
|
||||
#define ACPI_PM1_CNT 0
|
||||
#define ACPI_PM1_CNT_SLP_TYP(x) ( (x) << 10 ) /**< Sleep type */
|
||||
#define ACPI_PM1_CNT_SLP_EN ( 1 << 13 ) /**< Sleep enable */
|
||||
|
||||
/** Differentiated System Description Table (DSDT) signature */
|
||||
#define DSDT_SIGNATURE ACPI_SIGNATURE ( 'D', 'S', 'D', 'T' )
|
||||
|
||||
/** Secondary System Description Table (SSDT) signature */
|
||||
#define SSDT_SIGNATURE ACPI_SIGNATURE ( 'S', 'S', 'D', 'T' )
|
||||
|
||||
extern int acpi_describe ( struct interface *interface,
|
||||
struct acpi_description_header *acpi, size_t len );
|
||||
#define acpi_describe_TYPE( object_type ) \
|
||||
|
|
@ -59,5 +130,9 @@ extern int acpi_describe ( struct interface *interface,
|
|||
size_t len ) )
|
||||
|
||||
extern void acpi_fix_checksum ( struct acpi_description_header *acpi );
|
||||
extern userptr_t acpi_find_rsdt ( userptr_t ebda );
|
||||
extern userptr_t acpi_find ( userptr_t rsdt, uint32_t signature,
|
||||
unsigned int index );
|
||||
extern int acpi_sx ( userptr_t rsdt, uint32_t signature );
|
||||
|
||||
#endif /* _IPXE_ACPI_H */
|
||||
|
|
|
|||
Reference in New Issue