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grub/grub-core/commands/acpihalt.c
Colin Watson 33028f4c0b * grub-core/commands/acpihalt.c (skip_ext_op): Add support for 
skipping Event, Device, Processor, PowerRes, ThermalZone, and
	  BankField extended opcodes.
	  (get_sleep_type): Add minimal scope handling (just enough to
	  handle setting the scope to the root path).
	  (grub_acpi_halt): Parse any SSDTs as well as the DSDT.
	* include/grub/acpi.h: Add enumeration values for Event, Device,
	  Processor, PowerRes, ThermalZone, and BankField extended opcodes.
2013-03-26 11:29:52 +01:00

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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2010 Free Software Foundation, Inc.
*
* GRUB 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 3 of the License, or
* (at your option) any later version.
*
* GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#ifdef GRUB_DSDT_TEST
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#define grub_dprintf(cond, args...) printf ( args )
#define grub_printf printf
typedef uint64_t grub_uint64_t;
typedef uint32_t grub_uint32_t;
typedef uint16_t grub_uint16_t;
typedef uint8_t grub_uint8_t;
#endif
#include <grub/acpi.h>
#ifndef GRUB_DSDT_TEST
#include <grub/i18n.h>
#else
#define _(x) x
#define N_(x) x
#endif
#ifndef GRUB_DSDT_TEST
#include <grub/mm.h>
#include <grub/misc.h>
#include <grub/time.h>
#include <grub/cpu/io.h>
#endif
static inline grub_uint32_t
decode_length (const grub_uint8_t *ptr, int *numlen)
{
int num_bytes, i;
grub_uint32_t ret;
if (*ptr < 64)
{
if (numlen)
*numlen = 1;
return *ptr;
}
num_bytes = *ptr >> 6;
if (numlen)
*numlen = num_bytes + 1;
ret = *ptr & 0xf;
ptr++;
for (i = 0; i < num_bytes; i++)
{
ret |= *ptr << (8 * i + 4);
ptr++;
}
return ret;
}
static inline grub_uint32_t
skip_name_string (const grub_uint8_t *ptr, const grub_uint8_t *end)
{
const grub_uint8_t *ptr0 = ptr;
while (ptr < end && (*ptr == '^' || *ptr == '\\'))
ptr++;
switch (*ptr)
{
case '.':
ptr++;
ptr += 8;
break;
case '/':
ptr++;
ptr += 1 + (*ptr) * 4;
break;
case 0:
ptr++;
break;
default:
ptr += 4;
break;
}
return ptr - ptr0;
}
static inline grub_uint32_t
skip_data_ref_object (const grub_uint8_t *ptr, const grub_uint8_t *end)
{
grub_dprintf ("acpi", "data type = 0x%x\n", *ptr);
switch (*ptr)
{
case GRUB_ACPI_OPCODE_PACKAGE:
case GRUB_ACPI_OPCODE_BUFFER:
return 1 + decode_length (ptr + 1, 0);
case GRUB_ACPI_OPCODE_ZERO:
case GRUB_ACPI_OPCODE_ONES:
case GRUB_ACPI_OPCODE_ONE:
return 1;
case GRUB_ACPI_OPCODE_BYTE_CONST:
return 2;
case GRUB_ACPI_OPCODE_WORD_CONST:
return 3;
case GRUB_ACPI_OPCODE_DWORD_CONST:
return 5;
case GRUB_ACPI_OPCODE_STRING_CONST:
{
const grub_uint8_t *ptr0 = ptr;
for (ptr++; ptr < end && *ptr; ptr++);
if (ptr == end)
return 0;
return ptr - ptr0 + 1;
}
default:
if (*ptr == '^' || *ptr == '\\' || *ptr == '_'
|| (*ptr >= 'A' && *ptr <= 'Z'))
return skip_name_string (ptr, end);
grub_printf ("Unknown opcode 0x%x\n", *ptr);
return 0;
}
}
static inline grub_uint32_t
skip_ext_op (const grub_uint8_t *ptr, const grub_uint8_t *end)
{
const grub_uint8_t *ptr0 = ptr;
int add;
grub_dprintf ("acpi", "Extended opcode: 0x%x\n", *ptr);
switch (*ptr)
{
case GRUB_ACPI_EXTOPCODE_MUTEX:
ptr++;
ptr += skip_name_string (ptr, end);
ptr++;
break;
case GRUB_ACPI_EXTOPCODE_EVENT_OP:
ptr++;
ptr += skip_name_string (ptr, end);
break;
case GRUB_ACPI_EXTOPCODE_OPERATION_REGION:
ptr++;
ptr += skip_name_string (ptr, end);
ptr++;
ptr += add = skip_data_ref_object (ptr, end);
if (!add)
return 0;
ptr += add = skip_data_ref_object (ptr, end);
if (!add)
return 0;
break;
case GRUB_ACPI_EXTOPCODE_FIELD_OP:
case GRUB_ACPI_EXTOPCODE_DEVICE_OP:
case GRUB_ACPI_EXTOPCODE_PROCESSOR_OP:
case GRUB_ACPI_EXTOPCODE_POWER_RES_OP:
case GRUB_ACPI_EXTOPCODE_THERMAL_ZONE_OP:
case GRUB_ACPI_EXTOPCODE_INDEX_FIELD_OP:
case GRUB_ACPI_EXTOPCODE_BANK_FIELD_OP:
ptr++;
ptr += decode_length (ptr, 0);
break;
default:
grub_printf ("Unexpected extended opcode: 0x%x\n", *ptr);
return 0;
}
return ptr - ptr0;
}
static int
get_sleep_type (grub_uint8_t *table, grub_uint8_t *ptr, grub_uint8_t *end,
grub_uint8_t *scope, int scope_len)
{
grub_uint8_t *prev = table;
int sleep_type = -2;
if (!ptr)
ptr = table + sizeof (struct grub_acpi_table_header);
while (ptr < end && prev < ptr)
{
int add;
prev = ptr;
grub_dprintf ("acpi", "Opcode 0x%x\n", *ptr);
grub_dprintf ("acpi", "Tell %x\n", (unsigned) (ptr - table));
switch (*ptr)
{
case GRUB_ACPI_OPCODE_EXTOP:
ptr++;
ptr += add = skip_ext_op (ptr, end);
if (!add)
return -1;
break;
case GRUB_ACPI_OPCODE_CREATE_WORD_FIELD:
case GRUB_ACPI_OPCODE_CREATE_BYTE_FIELD:
{
ptr += 5;
ptr += add = skip_data_ref_object (ptr, end);
if (!add)
return -1;
ptr += 4;
break;
}
case GRUB_ACPI_OPCODE_NAME:
ptr++;
if ((!scope || memcmp (scope, "\\", scope_len) == 0) &&
(memcmp (ptr, "_S5_", 4) == 0 || memcmp (ptr, "\\_S5_", 4) == 0))
{
int ll;
grub_uint8_t *ptr2 = ptr;
grub_dprintf ("acpi", "S5 found\n");
ptr2 += skip_name_string (ptr, end);
if (*ptr2 != 0x12)
{
grub_printf ("Unknown opcode in _S5: 0x%x\n", *ptr2);
return -1;
}
ptr2++;
decode_length (ptr2, &ll);
ptr2 += ll;
ptr2++;
switch (*ptr2)
{
case GRUB_ACPI_OPCODE_ZERO:
sleep_type = 0;
break;
case GRUB_ACPI_OPCODE_ONE:
sleep_type = 1;
break;
case GRUB_ACPI_OPCODE_BYTE_CONST:
sleep_type = ptr2[1];
break;
default:
grub_printf ("Unknown data type in _S5: 0x%x\n", *ptr2);
return -1;
}
}
ptr += add = skip_name_string (ptr, end);
if (!add)
return -1;
ptr += add = skip_data_ref_object (ptr, end);
if (!add)
return -1;
break;
case GRUB_ACPI_OPCODE_SCOPE:
{
int scope_sleep_type;
int ll;
grub_uint8_t *name;
int name_len;
ptr++;
add = decode_length (ptr, &ll);
name = ptr + ll;
name_len = skip_name_string (name, ptr + add);
if (!name_len)
return -1;
scope_sleep_type = get_sleep_type (table, name + name_len,
ptr + add, name, name_len);
if (scope_sleep_type != -2)
return scope_sleep_type;
ptr += add;
break;
}
case GRUB_ACPI_OPCODE_IF:
case GRUB_ACPI_OPCODE_METHOD:
{
ptr++;
ptr += decode_length (ptr, 0);
break;
}
default:
grub_printf ("Unknown opcode 0x%x\n", *ptr);
return -1;
}
}
grub_dprintf ("acpi", "TYP = %d\n", sleep_type);
return sleep_type;
}
#ifdef GRUB_DSDT_TEST
int
main (int argc, char **argv)
{
FILE *f;
size_t len;
unsigned char *buf;
if (argc < 2)
printf ("Usage: %s FILE\n", argv[0]);
f = fopen (argv[1], "rb");
if (!f)
{
printf ("Couldn't open file\n");
return 1;
}
fseek (f, 0, SEEK_END);
len = ftell (f);
fseek (f, 0, SEEK_SET);
buf = malloc (len);
if (!buf)
{
printf ("Couldn't malloc buffer\n");
fclose (f);
return 2;
}
if (fread (buf, 1, len, f) != len)
{
printf ("Read failed\n");
free (buf);
fclose (f);
return 2;
}
printf ("Sleep type = %d\n", get_sleep_type (buf, NULL, buf + len, NULL, 0));
free (buf);
fclose (f);
return 0;
}
#else
void
grub_acpi_halt (void)
{
struct grub_acpi_rsdp_v20 *rsdp2;
struct grub_acpi_rsdp_v10 *rsdp1;
struct grub_acpi_table_header *rsdt;
grub_uint32_t *entry_ptr;
grub_uint32_t port = 0;
int sleep_type = -1;
rsdp2 = grub_acpi_get_rsdpv2 ();
if (rsdp2)
rsdp1 = &(rsdp2->rsdpv1);
else
rsdp1 = grub_acpi_get_rsdpv1 ();
grub_dprintf ("acpi", "rsdp1=%p\n", rsdp1);
if (!rsdp1)
return;
rsdt = (struct grub_acpi_table_header *) (grub_addr_t) rsdp1->rsdt_addr;
for (entry_ptr = (grub_uint32_t *) (rsdt + 1);
entry_ptr < (grub_uint32_t *) (((grub_uint8_t *) rsdt)
+ rsdt->length);
entry_ptr++)
{
if (grub_memcmp ((void *) (grub_addr_t) *entry_ptr, "FACP", 4) == 0)
{
struct grub_acpi_fadt *fadt
= ((struct grub_acpi_fadt *) (grub_addr_t) *entry_ptr);
struct grub_acpi_table_header *dsdt
= (struct grub_acpi_table_header *) (grub_addr_t) fadt->dsdt_addr;
grub_uint8_t *buf = (grub_uint8_t *) dsdt;
port = fadt->pm1a;
grub_dprintf ("acpi", "PM1a port=%x\n", port);
if (grub_memcmp (dsdt->signature, "DSDT",
sizeof (dsdt->signature)) == 0)
sleep_type = get_sleep_type (buf, NULL, buf + dsdt->length,
NULL, 0);
}
else if (grub_memcmp ((void *) (grub_addr_t) *entry_ptr, "SSDT", 4) == 0)
{
struct grub_acpi_table_header *ssdt
= (struct grub_acpi_table_header *) (grub_addr_t) *entry_ptr;
grub_uint8_t *buf = (grub_uint8_t *) ssdt;
grub_dprintf ("acpi", "SSDT = %p\n", ssdt);
sleep_type = get_sleep_type (buf, NULL, buf + ssdt->length, NULL, 0);
}
}
if (port && sleep_type >= 0 && sleep_type < 8)
{
grub_dprintf ("acpi", "SLP_TYP = %d, port = 0x%x\n", sleep_type, port);
grub_outw (GRUB_ACPI_SLP_EN | (sleep_type << GRUB_ACPI_SLP_TYP_OFFSET),
port & 0xffff);
}
grub_millisleep (1500);
/* TRANSLATORS: It's computer shutdown using ACPI, not disabling ACPI. */
grub_puts_ (N_("ACPI shutdown failed"));
}
#endif
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