267 lines
6.2 KiB
C
267 lines
6.2 KiB
C
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2010 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/acpi.h>
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#include <grub/misc.h>
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#include <grub/cpu/io.h>
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static inline grub_uint32_t
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decode_length (const grub_uint8_t *ptr, int *numlen)
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{
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int num_bytes, i;
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grub_uint32_t ret;
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if (*ptr < 64)
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{
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if (numlen)
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*numlen = 1;
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return *ptr;
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}
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num_bytes = *ptr >> 6;
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if (numlen)
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*numlen = num_bytes + 1;
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ret = *ptr & 0xf;
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ptr++;
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for (i = 0; i < num_bytes; i++)
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{
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ret |= *ptr << (8 * i + 4);
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ptr++;
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}
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return ret;
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}
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static inline grub_uint32_t
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skip_name_string (const grub_uint8_t *ptr, const grub_uint8_t *end)
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{
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const grub_uint8_t *ptr0 = ptr;
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while (ptr < end && (*ptr == '^' || *ptr == '\\'))
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ptr++;
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switch (*ptr)
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{
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case '.':
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ptr++;
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ptr += 8;
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break;
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case '/':
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ptr++;
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ptr += 1 + (*ptr) * 4;
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break;
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case 0:
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ptr++;
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break;
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default:
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ptr += 4;
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break;
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}
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return ptr - ptr0;
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}
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static inline grub_uint32_t
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skip_data_ref_object (const grub_uint8_t *ptr, const grub_uint8_t *end)
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{
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grub_dprintf ("acpi", "data type = 0x%x\n", *ptr);
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switch (*ptr)
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{
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case GRUB_ACPI_OPCODE_PACKAGE:
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return 1 + decode_length (ptr + 1, 0);
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case GRUB_ACPI_OPCODE_ZERO:
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case GRUB_ACPI_OPCODE_ONES:
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case GRUB_ACPI_OPCODE_ONE:
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return 1;
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case GRUB_ACPI_OPCODE_BYTE_CONST:
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return 2;
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case GRUB_ACPI_OPCODE_WORD_CONST:
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return 3;
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case GRUB_ACPI_OPCODE_DWORD_CONST:
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return 5;
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default:
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if (*ptr == '^' || *ptr == '\\' || *ptr == '_'
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|| (*ptr >= 'A' && *ptr <= 'Z'))
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return skip_name_string (ptr, end);
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grub_printf ("Unknown opcode 0x%x\n", *ptr);
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return 0;
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}
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}
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static inline grub_uint32_t
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skip_ext_op (const grub_uint8_t *ptr, const grub_uint8_t *end)
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{
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const grub_uint8_t *ptr0 = ptr;
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int add;
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grub_dprintf ("acpi", "Extended opcode: 0x%x\n", *ptr);
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switch (*ptr)
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{
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case GRUB_ACPI_EXTOPCODE_MUTEX:
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ptr++;
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ptr += skip_name_string (ptr, end);
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ptr++;
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break;
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case GRUB_ACPI_EXTOPCODE_OPERATION_REGION:
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ptr++;
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ptr += skip_name_string (ptr, end);
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ptr++;
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ptr += add = skip_data_ref_object (ptr, end);
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if (!add)
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return 0;
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ptr += add = skip_data_ref_object (ptr, end);
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if (!add)
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return 0;
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break;
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case GRUB_ACPI_EXTOPCODE_FIELD_OP:
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ptr++;
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ptr += decode_length (ptr, 0);
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break;
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default:
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grub_printf ("Unexpected extended opcode: 0x%x\n", *ptr);
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return 0;
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}
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return ptr - ptr0;
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}
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static int
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get_sleep_type (grub_uint8_t *table, grub_uint8_t *end)
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{
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grub_uint8_t *ptr, *prev;
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int sleep_type = -1;
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ptr = table + sizeof (struct grub_acpi_table_header);
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while (ptr < end && prev < ptr)
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{
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int add;
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prev = ptr;
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grub_dprintf ("acpi", "Opcode 0x%x\n", *ptr);
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grub_dprintf ("acpi", "Tell %x\n", (unsigned) (ptr - table));
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switch (*ptr)
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{
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case GRUB_ACPI_OPCODE_EXTOP:
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ptr++;
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ptr += add = skip_ext_op (ptr, end);
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if (!add)
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return -1;
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break;
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case GRUB_ACPI_OPCODE_NAME:
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ptr++;
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if (memcmp (ptr, "_S5_", 4) == 0)
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{
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int ll;
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grub_uint8_t *ptr2 = ptr;
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ptr2 += 4;
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if (*ptr2 != 0x12)
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{
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grub_printf ("Unknown opcode in _S5: 0x%x\n", *ptr2);
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return -1;
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}
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ptr2++;
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decode_length (ptr2, &ll);
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ptr2 += ll;
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ptr2++;
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switch (*ptr2)
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{
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case GRUB_ACPI_OPCODE_ZERO:
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sleep_type = 0;
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break;
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case GRUB_ACPI_OPCODE_ONE:
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sleep_type = 1;
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break;
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case GRUB_ACPI_OPCODE_BYTE_CONST:
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sleep_type = ptr2[1];
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break;
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default:
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grub_printf ("Unknown data type in _S5: 0x%x\n", *ptr2);
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return -1;
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}
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}
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ptr += add = skip_name_string (ptr, end);
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if (!add)
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return -1;
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ptr += add = skip_data_ref_object (ptr, end);
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if (!add)
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return -1;
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break;
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case GRUB_ACPI_OPCODE_SCOPE:
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case GRUB_ACPI_OPCODE_IF:
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case GRUB_ACPI_OPCODE_METHOD:
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{
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ptr++;
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ptr += decode_length (ptr, 0);
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break;
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}
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}
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}
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grub_dprintf ("acpi", "TYP = %d\n", sleep_type);
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return sleep_type;
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}
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void
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grub_acpi_halt (void)
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{
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struct grub_acpi_rsdp_v20 *rsdp2;
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struct grub_acpi_rsdp_v10 *rsdp1;
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struct grub_acpi_table_header *rsdt;
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grub_uint32_t *entry_ptr;
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rsdp2 = grub_acpi_get_rsdpv2 ();
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if (rsdp2)
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rsdp1 = &(rsdp2->rsdpv1);
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else
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rsdp1 = grub_acpi_get_rsdpv1 ();
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grub_dprintf ("acpi", "rsdp1=%p\n", rsdp1);
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if (!rsdp1)
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return;
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rsdt = (struct grub_acpi_table_header *) (grub_addr_t) rsdp1->rsdt_addr;
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for (entry_ptr = (grub_uint32_t *) (rsdt + 1);
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entry_ptr < (grub_uint32_t *) (((grub_uint8_t *) rsdt)
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+ rsdt->length);
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entry_ptr++)
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{
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if (grub_memcmp ((void *) (grub_addr_t) *entry_ptr, "FACP", 4) == 0)
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{
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grub_uint32_t port;
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struct grub_acpi_fadt *fadt
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= ((struct grub_acpi_fadt *) (grub_addr_t) *entry_ptr);
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struct grub_acpi_table_header *dsdt
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= (struct grub_acpi_table_header *) (grub_addr_t) fadt->dsdt_addr;
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int sleep_type = -1;
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port = fadt->pm1a;
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grub_dprintf ("acpi", "PM1a port=%x\n", port);
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if (grub_memcmp (dsdt->signature, "DSDT",
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sizeof (dsdt->signature)) != 0)
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break;
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sleep_type = get_sleep_type ((grub_uint8_t *) dsdt,
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(grub_uint8_t *) dsdt + dsdt->length);
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if (sleep_type < 0 || sleep_type >= 8)
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break;
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grub_dprintf ("acpi", "SLP_TYP = %d, port = 0x%x\n",
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sleep_type, port);
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grub_outw (GRUB_ACPI_SLP_EN
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| (sleep_type << GRUB_ACPI_SLP_TYP_OFFSET), port & 0xffff);
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}
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}
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grub_printf ("ACPI shutdown failed\n");
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}
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