^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /******************************************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Module Name: tbfadt - FADT table utilities
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 2000 - 2020, Intel Corp.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *****************************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <acpi/acpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include "accommon.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include "actables.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #define _COMPONENT ACPI_TABLES
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) ACPI_MODULE_NAME("tbfadt")
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) /* Local prototypes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) acpi_tb_init_generic_address(struct acpi_generic_address *generic_address,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) u8 space_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) u8 byte_width,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) u64 address, const char *register_name, u8 flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) static void acpi_tb_convert_fadt(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) static void acpi_tb_setup_fadt_registers(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) static u64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) acpi_tb_select_address(char *register_name, u32 address32, u64 address64);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) /* Table for conversion of FADT to common internal format and FADT validation */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) typedef struct acpi_fadt_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) const char *name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) u16 address64;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) u16 address32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) u16 length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) u8 default_length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) u8 flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) } acpi_fadt_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #define ACPI_FADT_OPTIONAL 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #define ACPI_FADT_REQUIRED 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #define ACPI_FADT_SEPARATE_LENGTH 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #define ACPI_FADT_GPE_REGISTER 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) static struct acpi_fadt_info fadt_info_table[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) {"Pm1aEventBlock",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) ACPI_FADT_OFFSET(xpm1a_event_block),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) ACPI_FADT_OFFSET(pm1a_event_block),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) ACPI_FADT_OFFSET(pm1_event_length),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) ACPI_PM1_REGISTER_WIDTH * 2, /* Enable + Status register */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) ACPI_FADT_REQUIRED},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) {"Pm1bEventBlock",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) ACPI_FADT_OFFSET(xpm1b_event_block),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) ACPI_FADT_OFFSET(pm1b_event_block),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) ACPI_FADT_OFFSET(pm1_event_length),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) ACPI_PM1_REGISTER_WIDTH * 2, /* Enable + Status register */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) ACPI_FADT_OPTIONAL},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) {"Pm1aControlBlock",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) ACPI_FADT_OFFSET(xpm1a_control_block),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) ACPI_FADT_OFFSET(pm1a_control_block),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) ACPI_FADT_OFFSET(pm1_control_length),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) ACPI_PM1_REGISTER_WIDTH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) ACPI_FADT_REQUIRED},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) {"Pm1bControlBlock",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) ACPI_FADT_OFFSET(xpm1b_control_block),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) ACPI_FADT_OFFSET(pm1b_control_block),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) ACPI_FADT_OFFSET(pm1_control_length),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) ACPI_PM1_REGISTER_WIDTH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) ACPI_FADT_OPTIONAL},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) {"Pm2ControlBlock",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) ACPI_FADT_OFFSET(xpm2_control_block),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) ACPI_FADT_OFFSET(pm2_control_block),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) ACPI_FADT_OFFSET(pm2_control_length),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) ACPI_PM2_REGISTER_WIDTH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) ACPI_FADT_SEPARATE_LENGTH},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) {"PmTimerBlock",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) ACPI_FADT_OFFSET(xpm_timer_block),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) ACPI_FADT_OFFSET(pm_timer_block),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) ACPI_FADT_OFFSET(pm_timer_length),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) ACPI_PM_TIMER_WIDTH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) ACPI_FADT_SEPARATE_LENGTH}, /* ACPI 5.0A: Timer is optional */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) {"Gpe0Block",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) ACPI_FADT_OFFSET(xgpe0_block),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) ACPI_FADT_OFFSET(gpe0_block),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) ACPI_FADT_OFFSET(gpe0_block_length),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) ACPI_FADT_SEPARATE_LENGTH | ACPI_FADT_GPE_REGISTER},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) {"Gpe1Block",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) ACPI_FADT_OFFSET(xgpe1_block),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) ACPI_FADT_OFFSET(gpe1_block),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) ACPI_FADT_OFFSET(gpe1_block_length),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) ACPI_FADT_SEPARATE_LENGTH | ACPI_FADT_GPE_REGISTER}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) #define ACPI_FADT_INFO_ENTRIES \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) (sizeof (fadt_info_table) / sizeof (struct acpi_fadt_info))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) /* Table used to split Event Blocks into separate status/enable registers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) typedef struct acpi_fadt_pm_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) struct acpi_generic_address *target;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) u16 source;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) u8 register_num;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) } acpi_fadt_pm_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) static struct acpi_fadt_pm_info fadt_pm_info_table[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) {&acpi_gbl_xpm1a_status,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) ACPI_FADT_OFFSET(xpm1a_event_block),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 0},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) {&acpi_gbl_xpm1a_enable,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) ACPI_FADT_OFFSET(xpm1a_event_block),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 1},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) {&acpi_gbl_xpm1b_status,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) ACPI_FADT_OFFSET(xpm1b_event_block),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 0},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) {&acpi_gbl_xpm1b_enable,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) ACPI_FADT_OFFSET(xpm1b_event_block),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 1}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) #define ACPI_FADT_PM_INFO_ENTRIES \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) (sizeof (fadt_pm_info_table) / sizeof (struct acpi_fadt_pm_info))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) /*******************************************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) * FUNCTION: acpi_tb_init_generic_address
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) * PARAMETERS: generic_address - GAS struct to be initialized
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) * space_id - ACPI Space ID for this register
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) * byte_width - Width of this register
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) * address - Address of the register
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) * register_name - ASCII name of the ACPI register
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) * RETURN: None
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) * DESCRIPTION: Initialize a Generic Address Structure (GAS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) * See the ACPI specification for a full description and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) * definition of this structure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) ******************************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) acpi_tb_init_generic_address(struct acpi_generic_address *generic_address,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) u8 space_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) u8 byte_width,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) u64 address, const char *register_name, u8 flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) u8 bit_width;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) * Bit width field in the GAS is only one byte long, 255 max.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) * Check for bit_width overflow in GAS.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) bit_width = (u8)(byte_width * 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) if (byte_width > 31) { /* (31*8)=248, (32*8)=256 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) * No error for GPE blocks, because we do not use the bit_width
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) * for GPEs, the legacy length (byte_width) is used instead to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) * allow for a large number of GPEs.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) if (!(flags & ACPI_FADT_GPE_REGISTER)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) ACPI_ERROR((AE_INFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) "%s - 32-bit FADT register is too long (%u bytes, %u bits) "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) "to convert to GAS struct - 255 bits max, truncating",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) register_name, byte_width,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) (byte_width * 8)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) bit_width = 255;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) * The 64-bit Address field is non-aligned in the byte packed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) * GAS struct.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) ACPI_MOVE_64_TO_64(&generic_address->address, &address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) /* All other fields are byte-wide */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) generic_address->space_id = space_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) generic_address->bit_width = bit_width;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) generic_address->bit_offset = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) generic_address->access_width = 0; /* Access width ANY */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) /*******************************************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) * FUNCTION: acpi_tb_select_address
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) * PARAMETERS: register_name - ASCII name of the ACPI register
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) * address32 - 32-bit address of the register
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) * address64 - 64-bit address of the register
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) * RETURN: The resolved 64-bit address
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) * DESCRIPTION: Select between 32-bit and 64-bit versions of addresses within
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) * the FADT. Used for the FACS and DSDT addresses.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) * NOTES:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) * Check for FACS and DSDT address mismatches. An address mismatch between
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) * the 32-bit and 64-bit address fields (FIRMWARE_CTRL/X_FIRMWARE_CTRL and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) * DSDT/X_DSDT) could be a corrupted address field or it might indicate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) * the presence of two FACS or two DSDT tables.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) * November 2013:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) * By default, as per the ACPICA specification, a valid 64-bit address is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) * used regardless of the value of the 32-bit address. However, this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) * behavior can be overridden via the acpi_gbl_use32_bit_fadt_addresses flag.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) ******************************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) static u64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) acpi_tb_select_address(char *register_name, u32 address32, u64 address64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) if (!address64) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) /* 64-bit address is zero, use 32-bit address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) return ((u64)address32);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) if (address32 && (address64 != (u64)address32)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) /* Address mismatch between 32-bit and 64-bit versions */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) ACPI_BIOS_WARNING((AE_INFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) "32/64X %s address mismatch in FADT: "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) "0x%8.8X/0x%8.8X%8.8X, using %u-bit address",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) register_name, address32,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) ACPI_FORMAT_UINT64(address64),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) acpi_gbl_use32_bit_fadt_addresses ? 32 :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 64));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) /* 32-bit address override */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) if (acpi_gbl_use32_bit_fadt_addresses) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) return ((u64)address32);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) /* Default is to use the 64-bit address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) return (address64);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) /*******************************************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) * FUNCTION: acpi_tb_parse_fadt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) * PARAMETERS: None
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) * RETURN: None
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) * DESCRIPTION: Initialize the FADT, DSDT and FACS tables
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) * (FADT contains the addresses of the DSDT and FACS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) ******************************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) void acpi_tb_parse_fadt(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) u32 length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) struct acpi_table_header *table;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) struct acpi_table_desc *fadt_desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) acpi_status status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) * The FADT has multiple versions with different lengths,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) * and it contains pointers to both the DSDT and FACS tables.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) * Get a local copy of the FADT and convert it to a common format
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) * Map entire FADT, assumed to be smaller than one page.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) fadt_desc = &acpi_gbl_root_table_list.tables[acpi_gbl_fadt_index];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) status = acpi_tb_get_table(fadt_desc, &table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) if (ACPI_FAILURE(status)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) length = fadt_desc->length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) * Validate the FADT checksum before we copy the table. Ignore
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) * checksum error as we want to try to get the DSDT and FACS.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) (void)acpi_tb_verify_checksum(table, length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) /* Create a local copy of the FADT in common ACPI 2.0+ format */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) acpi_tb_create_local_fadt(table, length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) /* All done with the real FADT, unmap it */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) acpi_tb_put_table(fadt_desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) /* Obtain the DSDT and FACS tables via their addresses within the FADT */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) acpi_tb_install_standard_table((acpi_physical_address)acpi_gbl_FADT.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) Xdsdt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) FALSE, TRUE, &acpi_gbl_dsdt_index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) /* If Hardware Reduced flag is set, there is no FACS */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) if (!acpi_gbl_reduced_hardware) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) if (acpi_gbl_FADT.facs) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) acpi_tb_install_standard_table((acpi_physical_address)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) acpi_gbl_FADT.facs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) FALSE, TRUE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) &acpi_gbl_facs_index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) if (acpi_gbl_FADT.Xfacs) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) acpi_tb_install_standard_table((acpi_physical_address)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) acpi_gbl_FADT.Xfacs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) FALSE, TRUE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) &acpi_gbl_xfacs_index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) /*******************************************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) * FUNCTION: acpi_tb_create_local_fadt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) * PARAMETERS: table - Pointer to BIOS FADT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) * length - Length of the table
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) * RETURN: None
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) * DESCRIPTION: Get a local copy of the FADT and convert it to a common format.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) * Performs validation on some important FADT fields.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) * NOTE: We create a local copy of the FADT regardless of the version.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) ******************************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) void acpi_tb_create_local_fadt(struct acpi_table_header *table, u32 length)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) * Check if the FADT is larger than the largest table that we expect
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) * (typically the current ACPI specification version). If so, truncate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) * the table, and issue a warning.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) if (length > sizeof(struct acpi_table_fadt)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) ACPI_BIOS_WARNING((AE_INFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) "FADT (revision %u) is longer than %s length, "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) "truncating length %u to %u",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) table->revision, ACPI_FADT_CONFORMANCE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) length,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) (u32)sizeof(struct acpi_table_fadt)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) /* Clear the entire local FADT */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) memset(&acpi_gbl_FADT, 0, sizeof(struct acpi_table_fadt));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) /* Copy the original FADT, up to sizeof (struct acpi_table_fadt) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) memcpy(&acpi_gbl_FADT, table,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) ACPI_MIN(length, sizeof(struct acpi_table_fadt)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) /* Take a copy of the Hardware Reduced flag */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) acpi_gbl_reduced_hardware = FALSE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) if (acpi_gbl_FADT.flags & ACPI_FADT_HW_REDUCED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) acpi_gbl_reduced_hardware = TRUE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) /* Convert the local copy of the FADT to the common internal format */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) acpi_tb_convert_fadt();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) /* Initialize the global ACPI register structures */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) acpi_tb_setup_fadt_registers();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) /*******************************************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) * FUNCTION: acpi_tb_convert_fadt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) * PARAMETERS: none - acpi_gbl_FADT is used.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) * RETURN: None
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) * DESCRIPTION: Converts all versions of the FADT to a common internal format.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) * Expand 32-bit addresses to 64-bit as necessary. Also validate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) * important fields within the FADT.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) * NOTE: acpi_gbl_FADT must be of size (struct acpi_table_fadt), and must
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) * contain a copy of the actual BIOS-provided FADT.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) * Notes on 64-bit register addresses:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) * After this FADT conversion, later ACPICA code will only use the 64-bit "X"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) * fields of the FADT for all ACPI register addresses.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) * The 64-bit X fields are optional extensions to the original 32-bit FADT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) * V1.0 fields. Even if they are present in the FADT, they are optional and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) * are unused if the BIOS sets them to zero. Therefore, we must copy/expand
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) * 32-bit V1.0 fields to the 64-bit X fields if the 64-bit X field is originally
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) * zero.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) * For ACPI 1.0 FADTs (that contain no 64-bit addresses), all 32-bit address
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) * fields are expanded to the corresponding 64-bit X fields in the internal
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) * common FADT.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) * For ACPI 2.0+ FADTs, all valid (non-zero) 32-bit address fields are expanded
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) * to the corresponding 64-bit X fields, if the 64-bit field is originally
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) * zero. Adhering to the ACPI specification, we completely ignore the 32-bit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) * field if the 64-bit field is valid, regardless of whether the host OS is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) * 32-bit or 64-bit.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) * Possible additional checks:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) * (acpi_gbl_FADT.pm1_event_length >= 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) * (acpi_gbl_FADT.pm1_control_length >= 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) * (acpi_gbl_FADT.pm_timer_length >= 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) * Gpe block lengths must be multiple of 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) ******************************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) static void acpi_tb_convert_fadt(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) const char *name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) struct acpi_generic_address *address64;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) u32 address32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) u8 length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) u8 flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) u32 i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) * For ACPI 1.0 FADTs (revision 1 or 2), ensure that reserved fields which
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) * should be zero are indeed zero. This will workaround BIOSs that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) * inadvertently place values in these fields.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) * The ACPI 1.0 reserved fields that will be zeroed are the bytes located
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) * at offset 45, 55, 95, and the word located at offset 109, 110.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) * Note: The FADT revision value is unreliable. Only the length can be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) * trusted.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) if (acpi_gbl_FADT.header.length <= ACPI_FADT_V2_SIZE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) acpi_gbl_FADT.preferred_profile = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) acpi_gbl_FADT.pstate_control = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) acpi_gbl_FADT.cst_control = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) acpi_gbl_FADT.boot_flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) * Now we can update the local FADT length to the length of the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) * current FADT version as defined by the ACPI specification.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) * Thus, we will have a common FADT internally.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) acpi_gbl_FADT.header.length = sizeof(struct acpi_table_fadt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) * Expand the 32-bit DSDT addresses to 64-bit as necessary.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) * Later ACPICA code will always use the X 64-bit field.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) acpi_gbl_FADT.Xdsdt = acpi_tb_select_address("DSDT",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) acpi_gbl_FADT.dsdt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) acpi_gbl_FADT.Xdsdt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) /* If Hardware Reduced flag is set, we are all done */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) if (acpi_gbl_reduced_hardware) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) /* Examine all of the 64-bit extended address fields (X fields) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) * Get the 32-bit and 64-bit addresses, as well as the register
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) * length and register name.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) address32 = *ACPI_ADD_PTR(u32,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) &acpi_gbl_FADT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) fadt_info_table[i].address32);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) address64 = ACPI_ADD_PTR(struct acpi_generic_address,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) &acpi_gbl_FADT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) fadt_info_table[i].address64);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) length = *ACPI_ADD_PTR(u8,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) &acpi_gbl_FADT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) fadt_info_table[i].length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) name = fadt_info_table[i].name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) flags = fadt_info_table[i].flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) * Expand the ACPI 1.0 32-bit addresses to the ACPI 2.0 64-bit "X"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) * generic address structures as necessary. Later code will always use
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) * the 64-bit address structures.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) * November 2013:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) * Now always use the 64-bit address if it is valid (non-zero), in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) * accordance with the ACPI specification which states that a 64-bit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) * address supersedes the 32-bit version. This behavior can be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) * overridden by the acpi_gbl_use32_bit_fadt_addresses flag.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) * During 64-bit address construction and verification,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) * these cases are handled:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) * Address32 zero, Address64 [don't care] - Use Address64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) * No override: if acpi_gbl_use32_bit_fadt_addresses is FALSE, and:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) * Address32 non-zero, Address64 zero - Copy/use Address32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) * Address32 non-zero == Address64 non-zero - Use Address64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) * Address32 non-zero != Address64 non-zero - Warning, use Address64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) * Override: if acpi_gbl_use32_bit_fadt_addresses is TRUE, and:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) * Address32 non-zero, Address64 zero - Copy/use Address32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) * Address32 non-zero == Address64 non-zero - Copy/use Address32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) * Address32 non-zero != Address64 non-zero - Warning, copy/use Address32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) * Note: space_id is always I/O for 32-bit legacy address fields
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) if (address32) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) if (address64->address) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) if (address64->address != (u64)address32) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) /* Address mismatch */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) ACPI_BIOS_WARNING((AE_INFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) "32/64X address mismatch in FADT/%s: "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) "0x%8.8X/0x%8.8X%8.8X, using %u-bit address",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) name, address32,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) ACPI_FORMAT_UINT64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) (address64->address),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) acpi_gbl_use32_bit_fadt_addresses
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) ? 32 : 64));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) * For each extended field, check for length mismatch
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) * between the legacy length field and the corresponding
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) * 64-bit X length field.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) * Note: If the legacy length field is > 0xFF bits, ignore
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) * this check. (GPE registers can be larger than the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) * 64-bit GAS structure can accommodate, 0xFF bits).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) if ((ACPI_MUL_8(length) <= ACPI_UINT8_MAX) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) (address64->bit_width !=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) ACPI_MUL_8(length))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) ACPI_BIOS_WARNING((AE_INFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) "32/64X length mismatch in FADT/%s: %u/%u",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) ACPI_MUL_8(length),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) address64->
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) bit_width));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) * Hardware register access code always uses the 64-bit fields.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) * So if the 64-bit field is zero or is to be overridden,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) * initialize it with the 32-bit fields.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) * Note that when the 32-bit address favor is specified, the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) * 64-bit fields are always re-initialized so that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) * access_size/bit_width/bit_offset fields can be correctly
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) * configured to the values to trigger a 32-bit compatible
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) * access mode in the hardware register access code.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) if (!address64->address
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) || acpi_gbl_use32_bit_fadt_addresses) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) acpi_tb_init_generic_address(address64,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) ACPI_ADR_SPACE_SYSTEM_IO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) length,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) (u64)address32,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) name, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) if (fadt_info_table[i].flags & ACPI_FADT_REQUIRED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) * Field is required (Pm1a_event, Pm1a_control).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) * Both the address and length must be non-zero.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) if (!address64->address || !length) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) ACPI_BIOS_ERROR((AE_INFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) "Required FADT field %s has zero address and/or length: "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) "0x%8.8X%8.8X/0x%X",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) ACPI_FORMAT_UINT64(address64->
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) address),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) length));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) } else if (fadt_info_table[i].flags & ACPI_FADT_SEPARATE_LENGTH) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) * Field is optional (Pm2_control, GPE0, GPE1) AND has its own
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) * length field. If present, both the address and length must
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) * be valid.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) if ((address64->address && !length) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) (!address64->address && length)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) ACPI_BIOS_WARNING((AE_INFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) "Optional FADT field %s has valid %s but zero %s: "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) "0x%8.8X%8.8X/0x%X", name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) (length ? "Length" :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) "Address"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) (length ? "Address" :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) "Length"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) ACPI_FORMAT_UINT64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) (address64->address),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) length));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) /*******************************************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) * FUNCTION: acpi_tb_setup_fadt_registers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) * PARAMETERS: None, uses acpi_gbl_FADT.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) * RETURN: None
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) * DESCRIPTION: Initialize global ACPI PM1 register definitions. Optionally,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) * force FADT register definitions to their default lengths.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) ******************************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) static void acpi_tb_setup_fadt_registers(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) struct acpi_generic_address *target64;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) struct acpi_generic_address *source64;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) u8 pm1_register_byte_width;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) u32 i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) * Optionally check all register lengths against the default values and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) * update them if they are incorrect.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) if (acpi_gbl_use_default_register_widths) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) target64 =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) ACPI_ADD_PTR(struct acpi_generic_address,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) &acpi_gbl_FADT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) fadt_info_table[i].address64);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) * If a valid register (Address != 0) and the (default_length > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) * (Not a GPE register), then check the width against the default.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) if ((target64->address) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) (fadt_info_table[i].default_length > 0) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) (fadt_info_table[i].default_length !=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) target64->bit_width)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) ACPI_BIOS_WARNING((AE_INFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) "Invalid length for FADT/%s: %u, using default %u",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) fadt_info_table[i].name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) target64->bit_width,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) fadt_info_table[i].
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) default_length));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) /* Incorrect size, set width to the default */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) target64->bit_width =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) fadt_info_table[i].default_length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) * Get the length of the individual PM1 registers (enable and status).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) * Each register is defined to be (event block length / 2). Extra divide
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) * by 8 converts bits to bytes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) pm1_register_byte_width = (u8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) ACPI_DIV_16(acpi_gbl_FADT.xpm1a_event_block.bit_width);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) * Calculate separate GAS structs for the PM1x (A/B) Status and Enable
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) * registers. These addresses do not appear (directly) in the FADT, so it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) * is useful to pre-calculate them from the PM1 Event Block definitions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) * The PM event blocks are split into two register blocks, first is the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) * PM Status Register block, followed immediately by the PM Enable
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) * Register block. Each is of length (pm1_event_length/2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) * Note: The PM1A event block is required by the ACPI specification.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) * However, the PM1B event block is optional and is rarely, if ever,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) * used.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) for (i = 0; i < ACPI_FADT_PM_INFO_ENTRIES; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) source64 =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) ACPI_ADD_PTR(struct acpi_generic_address, &acpi_gbl_FADT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) fadt_pm_info_table[i].source);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) if (source64->address) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) acpi_tb_init_generic_address(fadt_pm_info_table[i].
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) target, source64->space_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) pm1_register_byte_width,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) source64->address +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) (fadt_pm_info_table[i].
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) register_num *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) pm1_register_byte_width),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) "PmRegisters", 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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