1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * Based on acpi.c from coreboot
5 * Copyright (C) 2015, Saket Sinha <saket.sinha89@gmail.com>
6 * Copyright (C) 2016, Bin Meng <bmeng.cn@gmail.com>
9 #define RSDP_SIG "RSD PTR " /* RSDP pointer signature */
10 #define OEM_ID "U-BOOT" /* U-Boot */
11 #define OEM_TABLE_ID "U-BOOTBL" /* U-Boot Table */
12 #define ASLC_ID "INTL" /* Intel ASL Compiler */
14 #define ACPI_RSDP_REV_ACPI_1_0 0
15 #define ACPI_RSDP_REV_ACPI_2_0 2
18 * RSDP (Root System Description Pointer)
19 * Note: ACPI 1.0 didn't have length, xsdt_address, and ext_checksum
22 char signature[8]; /* RSDP signature */
23 u8 checksum; /* Checksum of the first 20 bytes */
24 char oem_id[6]; /* OEM ID */
25 u8 revision; /* 0 for ACPI 1.0, others 2 */
26 u32 rsdt_address; /* Physical address of RSDT (32 bits) */
27 u32 length; /* Total RSDP length (incl. extended part) */
28 u64 xsdt_address; /* Physical address of XSDT (64 bits) */
29 u8 ext_checksum; /* Checksum of the whole table */
33 /* Generic ACPI header, provided by (almost) all tables */
34 struct acpi_table_header {
35 char signature[4]; /* ACPI signature (4 ASCII characters) */
36 u32 length; /* Table length in bytes (incl. header) */
37 u8 revision; /* Table version (not ACPI version!) */
38 volatile u8 checksum; /* To make sum of entire table == 0 */
39 char oem_id[6]; /* OEM identification */
40 char oem_table_id[8]; /* OEM table identification */
41 u32 oem_revision; /* OEM revision number */
42 char aslc_id[4]; /* ASL compiler vendor ID */
43 u32 aslc_revision; /* ASL compiler revision number */
46 /* A maximum number of 32 ACPI tables ought to be enough for now */
47 #define MAX_ACPI_TABLES 32
49 /* RSDT (Root System Description Table) */
51 struct acpi_table_header header;
52 u32 entry[MAX_ACPI_TABLES];
55 /* XSDT (Extended System Description Table) */
57 struct acpi_table_header header;
58 u64 entry[MAX_ACPI_TABLES];
61 /* FADT Preferred Power Management Profile */
62 enum acpi_pm_profile {
63 ACPI_PM_UNSPECIFIED = 0,
67 ACPI_PM_ENTERPRISE_SERVER,
70 ACPI_PM_PERFORMANCE_SERVER,
74 /* FADT flags for p_lvl2_lat and p_lvl3_lat */
75 #define ACPI_FADT_C2_NOT_SUPPORTED 101
76 #define ACPI_FADT_C3_NOT_SUPPORTED 1001
78 /* FADT Boot Architecture Flags */
79 #define ACPI_FADT_LEGACY_FREE 0x00
80 #define ACPI_FADT_LEGACY_DEVICES (1 << 0)
81 #define ACPI_FADT_8042 (1 << 1)
82 #define ACPI_FADT_VGA_NOT_PRESENT (1 << 2)
83 #define ACPI_FADT_MSI_NOT_SUPPORTED (1 << 3)
84 #define ACPI_FADT_NO_PCIE_ASPM_CONTROL (1 << 4)
86 /* FADT Feature Flags */
87 #define ACPI_FADT_WBINVD (1 << 0)
88 #define ACPI_FADT_WBINVD_FLUSH (1 << 1)
89 #define ACPI_FADT_C1_SUPPORTED (1 << 2)
90 #define ACPI_FADT_C2_MP_SUPPORTED (1 << 3)
91 #define ACPI_FADT_POWER_BUTTON (1 << 4)
92 #define ACPI_FADT_SLEEP_BUTTON (1 << 5)
93 #define ACPI_FADT_FIXED_RTC (1 << 6)
94 #define ACPI_FADT_S4_RTC_WAKE (1 << 7)
95 #define ACPI_FADT_32BIT_TIMER (1 << 8)
96 #define ACPI_FADT_DOCKING_SUPPORTED (1 << 9)
97 #define ACPI_FADT_RESET_REGISTER (1 << 10)
98 #define ACPI_FADT_SEALED_CASE (1 << 11)
99 #define ACPI_FADT_HEADLESS (1 << 12)
100 #define ACPI_FADT_SLEEP_TYPE (1 << 13)
101 #define ACPI_FADT_PCI_EXPRESS_WAKE (1 << 14)
102 #define ACPI_FADT_PLATFORM_CLOCK (1 << 15)
103 #define ACPI_FADT_S4_RTC_VALID (1 << 16)
104 #define ACPI_FADT_REMOTE_POWER_ON (1 << 17)
105 #define ACPI_FADT_APIC_CLUSTER (1 << 18)
106 #define ACPI_FADT_APIC_PHYSICAL (1 << 19)
107 #define ACPI_FADT_HW_REDUCED_ACPI (1 << 20)
108 #define ACPI_FADT_LOW_PWR_IDLE_S0 (1 << 21)
110 enum acpi_address_space_type {
111 ACPI_ADDRESS_SPACE_MEMORY = 0, /* System memory */
112 ACPI_ADDRESS_SPACE_IO, /* System I/O */
113 ACPI_ADDRESS_SPACE_PCI, /* PCI config space */
114 ACPI_ADDRESS_SPACE_EC, /* Embedded controller */
115 ACPI_ADDRESS_SPACE_SMBUS, /* SMBus */
116 ACPI_ADDRESS_SPACE_PCC = 0x0a, /* Platform Comm. Channel */
117 ACPI_ADDRESS_SPACE_FIXED = 0x7f /* Functional fixed hardware */
120 enum acpi_address_space_size {
121 ACPI_ACCESS_SIZE_UNDEFINED = 0,
122 ACPI_ACCESS_SIZE_BYTE_ACCESS,
123 ACPI_ACCESS_SIZE_WORD_ACCESS,
124 ACPI_ACCESS_SIZE_DWORD_ACCESS,
125 ACPI_ACCESS_SIZE_QWORD_ACCESS
128 struct acpi_gen_regaddr {
129 u8 space_id; /* Address space ID */
130 u8 bit_width; /* Register size in bits */
131 u8 bit_offset; /* Register bit offset */
132 u8 access_size; /* Access size */
133 u32 addrl; /* Register address, low 32 bits */
134 u32 addrh; /* Register address, high 32 bits */
137 /* FADT (Fixed ACPI Description Table) */
138 struct __packed acpi_fadt {
139 struct acpi_table_header header;
143 u8 preferred_pm_profile;
178 struct acpi_gen_regaddr reset_reg;
182 u32 x_firmware_ctl_l;
183 u32 x_firmware_ctl_h;
186 struct acpi_gen_regaddr x_pm1a_evt_blk;
187 struct acpi_gen_regaddr x_pm1b_evt_blk;
188 struct acpi_gen_regaddr x_pm1a_cnt_blk;
189 struct acpi_gen_regaddr x_pm1b_cnt_blk;
190 struct acpi_gen_regaddr x_pm2_cnt_blk;
191 struct acpi_gen_regaddr x_pm_tmr_blk;
192 struct acpi_gen_regaddr x_gpe0_blk;
193 struct acpi_gen_regaddr x_gpe1_blk;
197 #define ACPI_FACS_S4BIOS_F (1 << 0)
198 #define ACPI_FACS_64BIT_WAKE_F (1 << 1)
200 /* FACS (Firmware ACPI Control Structure) */
202 char signature[4]; /* "FACS" */
203 u32 length; /* Length in bytes (>= 64) */
204 u32 hardware_signature; /* Hardware signature */
205 u32 firmware_waking_vector; /* Firmware waking vector */
206 u32 global_lock; /* Global lock */
207 u32 flags; /* FACS flags */
208 u32 x_firmware_waking_vector_l; /* X FW waking vector, low */
209 u32 x_firmware_waking_vector_h; /* X FW waking vector, high */
210 u8 version; /* Version 2 */
212 u32 ospm_flags; /* OSPM enabled flags */
217 #define ACPI_MADT_PCAT_COMPAT (1 << 0)
219 /* MADT (Multiple APIC Description Table) */
221 struct acpi_table_header header;
222 u32 lapic_addr; /* Local APIC address */
223 u32 flags; /* Multiple APIC flags */
226 /* MADT: APIC Structure Type*/
227 enum acpi_apic_types {
228 ACPI_APIC_LAPIC = 0, /* Processor local APIC */
229 ACPI_APIC_IOAPIC, /* I/O APIC */
230 ACPI_APIC_IRQ_SRC_OVERRIDE, /* Interrupt source override */
231 ACPI_APIC_NMI_SRC, /* NMI source */
232 ACPI_APIC_LAPIC_NMI, /* Local APIC NMI */
233 ACPI_APIC_LAPIC_ADDR_OVERRIDE, /* Local APIC address override */
234 ACPI_APIC_IOSAPIC, /* I/O SAPIC */
235 ACPI_APIC_LSAPIC, /* Local SAPIC */
236 ACPI_APIC_PLATFORM_IRQ_SRC, /* Platform interrupt sources */
237 ACPI_APIC_LX2APIC, /* Processor local x2APIC */
238 ACPI_APIC_LX2APIC_NMI, /* Local x2APIC NMI */
241 /* MADT: Processor Local APIC Structure */
243 #define LOCAL_APIC_FLAG_ENABLED (1 << 0)
245 struct acpi_madt_lapic {
246 u8 type; /* Type (0) */
247 u8 length; /* Length in bytes (8) */
248 u8 processor_id; /* ACPI processor ID */
249 u8 apic_id; /* Local APIC ID */
250 u32 flags; /* Local APIC flags */
253 /* MADT: I/O APIC Structure */
254 struct acpi_madt_ioapic {
255 u8 type; /* Type (1) */
256 u8 length; /* Length in bytes (12) */
257 u8 ioapic_id; /* I/O APIC ID */
259 u32 ioapic_addr; /* I/O APIC address */
260 u32 gsi_base; /* Global system interrupt base */
263 /* MADT: Interrupt Source Override Structure */
264 struct __packed acpi_madt_irqoverride {
265 u8 type; /* Type (2) */
266 u8 length; /* Length in bytes (10) */
267 u8 bus; /* ISA (0) */
268 u8 source; /* Bus-relative int. source (IRQ) */
269 u32 gsirq; /* Global system interrupt */
270 u16 flags; /* MPS INTI flags */
273 /* MADT: Local APIC NMI Structure */
274 struct __packed acpi_madt_lapic_nmi {
275 u8 type; /* Type (4) */
276 u8 length; /* Length in bytes (6) */
277 u8 processor_id; /* ACPI processor ID */
278 u16 flags; /* MPS INTI flags */
279 u8 lint; /* Local APIC LINT# */
282 /* MCFG (PCI Express MMIO config space BAR description table) */
284 struct acpi_table_header header;
288 struct acpi_mcfg_mmconfig {
291 u16 pci_segment_group_number;
297 /* PM1_CNT bit defines */
298 #define PM1_CNT_SCI_EN (1 << 0)
300 /* ACPI global NVS structure */
301 struct acpi_global_nvs;
303 /* These can be used by the target port */
305 void acpi_fill_header(struct acpi_table_header *header, char *signature);
306 void acpi_create_fadt(struct acpi_fadt *fadt, struct acpi_facs *facs,
308 int acpi_create_madt_lapics(u32 current);
309 int acpi_create_madt_ioapic(struct acpi_madt_ioapic *ioapic, u8 id,
310 u32 addr, u32 gsi_base);
311 int acpi_create_madt_irqoverride(struct acpi_madt_irqoverride *irqoverride,
312 u8 bus, u8 source, u32 gsirq, u16 flags);
313 int acpi_create_madt_lapic_nmi(struct acpi_madt_lapic_nmi *lapic_nmi,
314 u8 cpu, u16 flags, u8 lint);
315 u32 acpi_fill_madt(u32 current);
316 int acpi_create_mcfg_mmconfig(struct acpi_mcfg_mmconfig *mmconfig, u32 base,
317 u16 seg_nr, u8 start, u8 end);
318 u32 acpi_fill_mcfg(u32 current);
319 void acpi_create_gnvs(struct acpi_global_nvs *gnvs);
321 * enter_acpi_mode() - enter into ACPI mode
323 * This programs the ACPI-defined PM1_CNT register to enable SCI interrupt
324 * so that the whole system swiches to ACPI mode.
326 * @pm1_cnt: PM1_CNT register I/O address
328 void enter_acpi_mode(int pm1_cnt);
329 ulong write_acpi_tables(ulong start);
332 * acpi_get_rsdp_addr() - get ACPI RSDP table address
334 * This routine returns the ACPI RSDP table address in the system memory.
336 * @return: ACPI RSDP table address
338 ulong acpi_get_rsdp_addr(void);
341 * acpi_find_fadt() - find ACPI FADT table in the sytem memory
343 * This routine parses the ACPI table to locate the ACPI FADT table.
345 * @return: a pointer to the ACPI FADT table in the system memory
347 struct acpi_fadt *acpi_find_fadt(void);
350 * acpi_find_wakeup_vector() - find OS installed wake up vector address
352 * This routine parses the ACPI table to locate the wake up vector installed
353 * by the OS previously.
355 * @return: wake up vector address installed by the OS
357 void *acpi_find_wakeup_vector(struct acpi_fadt *);