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>
12 #include <dm/uclass-internal.h>
15 #include <acpi/acpi_table.h>
16 #include <asm/acpi/global_nvs.h>
17 #include <asm/ioapic.h>
18 #include <asm/lapic.h>
19 #include <asm/mpspec.h>
20 #include <asm/tables.h>
21 #include <asm/arch/global_nvs.h>
24 * IASL compiles the dsdt entries and writes the hex values
25 * to a C array AmlCode[] (see dsdt.c).
27 extern const unsigned char AmlCode[];
29 /* ACPI RSDP address to be used in boot parameters */
30 static ulong acpi_rsdp_addr;
32 static void acpi_write_rsdp(struct acpi_rsdp *rsdp, struct acpi_rsdt *rsdt,
33 struct acpi_xsdt *xsdt)
35 memset(rsdp, 0, sizeof(struct acpi_rsdp));
37 memcpy(rsdp->signature, RSDP_SIG, 8);
38 memcpy(rsdp->oem_id, OEM_ID, 6);
40 rsdp->length = sizeof(struct acpi_rsdp);
41 rsdp->rsdt_address = (u32)rsdt;
44 * Revision: ACPI 1.0: 0, ACPI 2.0/3.0/4.0: 2
46 * Some OSes expect an XSDT to be present for RSD PTR revisions >= 2.
47 * If we don't have an ACPI XSDT, force ACPI 1.0 (and thus RSD PTR
51 rsdp->revision = ACPI_RSDP_REV_ACPI_1_0;
53 rsdp->xsdt_address = (u64)(u32)xsdt;
54 rsdp->revision = ACPI_RSDP_REV_ACPI_2_0;
57 /* Calculate checksums */
58 rsdp->checksum = table_compute_checksum((void *)rsdp, 20);
59 rsdp->ext_checksum = table_compute_checksum((void *)rsdp,
60 sizeof(struct acpi_rsdp));
63 static void acpi_write_rsdt(struct acpi_rsdt *rsdt)
65 struct acpi_table_header *header = &(rsdt->header);
67 /* Fill out header fields */
68 acpi_fill_header(header, "RSDT");
69 header->length = sizeof(struct acpi_rsdt);
72 /* Entries are filled in later, we come with an empty set */
75 header->checksum = table_compute_checksum((void *)rsdt,
76 sizeof(struct acpi_rsdt));
79 static void acpi_write_xsdt(struct acpi_xsdt *xsdt)
81 struct acpi_table_header *header = &(xsdt->header);
83 /* Fill out header fields */
84 acpi_fill_header(header, "XSDT");
85 header->length = sizeof(struct acpi_xsdt);
88 /* Entries are filled in later, we come with an empty set */
91 header->checksum = table_compute_checksum((void *)xsdt,
92 sizeof(struct acpi_xsdt));
96 * Add an ACPI table to the RSDT (and XSDT) structure, recalculate length
99 static void acpi_add_table(struct acpi_rsdp *rsdp, void *table)
102 struct acpi_rsdt *rsdt;
103 struct acpi_xsdt *xsdt;
105 /* The RSDT is mandatory while the XSDT is not */
106 rsdt = (struct acpi_rsdt *)rsdp->rsdt_address;
108 /* This should always be MAX_ACPI_TABLES */
109 entries_num = ARRAY_SIZE(rsdt->entry);
111 for (i = 0; i < entries_num; i++) {
112 if (rsdt->entry[i] == 0)
116 if (i >= entries_num) {
117 debug("ACPI: Error: too many tables\n");
121 /* Add table to the RSDT */
122 rsdt->entry[i] = (u32)table;
124 /* Fix RSDT length or the kernel will assume invalid entries */
125 rsdt->header.length = sizeof(struct acpi_table_header) +
126 sizeof(u32) * (i + 1);
128 /* Re-calculate checksum */
129 rsdt->header.checksum = 0;
130 rsdt->header.checksum = table_compute_checksum((u8 *)rsdt,
131 rsdt->header.length);
133 /* The RSDT is mandatory while the XSDT is not */
134 if (!rsdp->xsdt_address)
138 * And now the same thing for the XSDT. We use the same index as for
139 * now we want the XSDT and RSDT to always be in sync in U-Boot
141 xsdt = (struct acpi_xsdt *)((u32)rsdp->xsdt_address);
143 /* Add table to the XSDT */
144 xsdt->entry[i] = (u64)(u32)table;
146 /* Fix XSDT length */
147 xsdt->header.length = sizeof(struct acpi_table_header) +
148 sizeof(u64) * (i + 1);
150 /* Re-calculate checksum */
151 xsdt->header.checksum = 0;
152 xsdt->header.checksum = table_compute_checksum((u8 *)xsdt,
153 xsdt->header.length);
156 static void acpi_create_facs(struct acpi_facs *facs)
158 memset((void *)facs, 0, sizeof(struct acpi_facs));
160 memcpy(facs->signature, "FACS", 4);
161 facs->length = sizeof(struct acpi_facs);
162 facs->hardware_signature = 0;
163 facs->firmware_waking_vector = 0;
164 facs->global_lock = 0;
166 facs->x_firmware_waking_vector_l = 0;
167 facs->x_firmware_waking_vector_h = 0;
171 static int acpi_create_madt_lapic(struct acpi_madt_lapic *lapic,
174 lapic->type = ACPI_APIC_LAPIC;
175 lapic->length = sizeof(struct acpi_madt_lapic);
176 lapic->flags = LOCAL_APIC_FLAG_ENABLED;
177 lapic->processor_id = cpu;
178 lapic->apic_id = apic;
180 return lapic->length;
183 int acpi_create_madt_lapics(u32 current)
186 int total_length = 0;
188 for (uclass_find_first_device(UCLASS_CPU, &dev);
190 uclass_find_next_device(&dev)) {
191 struct cpu_platdata *plat = dev_get_parent_platdata(dev);
192 int length = acpi_create_madt_lapic(
193 (struct acpi_madt_lapic *)current,
194 plat->cpu_id, plat->cpu_id);
196 total_length += length;
202 int acpi_create_madt_ioapic(struct acpi_madt_ioapic *ioapic, u8 id,
203 u32 addr, u32 gsi_base)
205 ioapic->type = ACPI_APIC_IOAPIC;
206 ioapic->length = sizeof(struct acpi_madt_ioapic);
207 ioapic->reserved = 0x00;
208 ioapic->gsi_base = gsi_base;
209 ioapic->ioapic_id = id;
210 ioapic->ioapic_addr = addr;
212 return ioapic->length;
215 int acpi_create_madt_irqoverride(struct acpi_madt_irqoverride *irqoverride,
216 u8 bus, u8 source, u32 gsirq, u16 flags)
218 irqoverride->type = ACPI_APIC_IRQ_SRC_OVERRIDE;
219 irqoverride->length = sizeof(struct acpi_madt_irqoverride);
220 irqoverride->bus = bus;
221 irqoverride->source = source;
222 irqoverride->gsirq = gsirq;
223 irqoverride->flags = flags;
225 return irqoverride->length;
228 int acpi_create_madt_lapic_nmi(struct acpi_madt_lapic_nmi *lapic_nmi,
229 u8 cpu, u16 flags, u8 lint)
231 lapic_nmi->type = ACPI_APIC_LAPIC_NMI;
232 lapic_nmi->length = sizeof(struct acpi_madt_lapic_nmi);
233 lapic_nmi->flags = flags;
234 lapic_nmi->processor_id = cpu;
235 lapic_nmi->lint = lint;
237 return lapic_nmi->length;
240 static int acpi_create_madt_irq_overrides(u32 current)
242 struct acpi_madt_irqoverride *irqovr;
243 u16 sci_flags = MP_IRQ_TRIGGER_LEVEL | MP_IRQ_POLARITY_HIGH;
246 irqovr = (void *)current;
247 length += acpi_create_madt_irqoverride(irqovr, 0, 0, 2, 0);
249 irqovr = (void *)(current + length);
250 length += acpi_create_madt_irqoverride(irqovr, 0, 9, 9, sci_flags);
255 __weak u32 acpi_fill_madt(u32 current)
257 current += acpi_create_madt_lapics(current);
259 current += acpi_create_madt_ioapic((struct acpi_madt_ioapic *)current,
260 io_apic_read(IO_APIC_ID) >> 24, IO_APIC_ADDR, 0);
262 current += acpi_create_madt_irq_overrides(current);
267 static void acpi_create_madt(struct acpi_madt *madt)
269 struct acpi_table_header *header = &(madt->header);
270 u32 current = (u32)madt + sizeof(struct acpi_madt);
272 memset((void *)madt, 0, sizeof(struct acpi_madt));
274 /* Fill out header fields */
275 acpi_fill_header(header, "APIC");
276 header->length = sizeof(struct acpi_madt);
277 header->revision = 4;
279 madt->lapic_addr = LAPIC_DEFAULT_BASE;
280 madt->flags = ACPI_MADT_PCAT_COMPAT;
282 current = acpi_fill_madt(current);
284 /* (Re)calculate length and checksum */
285 header->length = current - (u32)madt;
287 header->checksum = table_compute_checksum((void *)madt, header->length);
290 int acpi_create_mcfg_mmconfig(struct acpi_mcfg_mmconfig *mmconfig, u32 base,
291 u16 seg_nr, u8 start, u8 end)
293 memset(mmconfig, 0, sizeof(*mmconfig));
294 mmconfig->base_address_l = base;
295 mmconfig->base_address_h = 0;
296 mmconfig->pci_segment_group_number = seg_nr;
297 mmconfig->start_bus_number = start;
298 mmconfig->end_bus_number = end;
300 return sizeof(struct acpi_mcfg_mmconfig);
303 __weak u32 acpi_fill_mcfg(u32 current)
305 current += acpi_create_mcfg_mmconfig
306 ((struct acpi_mcfg_mmconfig *)current,
307 CONFIG_PCIE_ECAM_BASE, 0x0, 0x0, 255);
312 /* MCFG is defined in the PCI Firmware Specification 3.0 */
313 static void acpi_create_mcfg(struct acpi_mcfg *mcfg)
315 struct acpi_table_header *header = &(mcfg->header);
316 u32 current = (u32)mcfg + sizeof(struct acpi_mcfg);
318 memset((void *)mcfg, 0, sizeof(struct acpi_mcfg));
320 /* Fill out header fields */
321 acpi_fill_header(header, "MCFG");
322 header->length = sizeof(struct acpi_mcfg);
323 header->revision = 1;
325 current = acpi_fill_mcfg(current);
327 /* (Re)calculate length and checksum */
328 header->length = current - (u32)mcfg;
329 header->checksum = table_compute_checksum((void *)mcfg, header->length);
332 __weak u32 acpi_fill_csrt(u32 current)
337 static void acpi_create_csrt(struct acpi_csrt *csrt)
339 struct acpi_table_header *header = &(csrt->header);
340 u32 current = (u32)csrt + sizeof(struct acpi_csrt);
342 memset((void *)csrt, 0, sizeof(struct acpi_csrt));
344 /* Fill out header fields */
345 acpi_fill_header(header, "CSRT");
346 header->length = sizeof(struct acpi_csrt);
347 header->revision = 0;
349 current = acpi_fill_csrt(current);
351 /* (Re)calculate length and checksum */
352 header->length = current - (u32)csrt;
353 header->checksum = table_compute_checksum((void *)csrt, header->length);
356 static void acpi_create_spcr(struct acpi_spcr *spcr)
358 struct acpi_table_header *header = &(spcr->header);
359 struct serial_device_info serial_info = {0};
360 ulong serial_address, serial_offset;
368 /* Fill out header fields */
369 acpi_fill_header(header, "SPCR");
370 header->length = sizeof(struct acpi_spcr);
371 header->revision = 2;
373 /* Read the device once, here. It is reused below */
374 dev = gd->cur_serial_dev;
376 ret = serial_getinfo(dev, &serial_info);
378 serial_info.type = SERIAL_CHIP_UNKNOWN;
380 /* Encode chip type */
381 switch (serial_info.type) {
382 case SERIAL_CHIP_16550_COMPATIBLE:
383 spcr->interface_type = ACPI_DBG2_16550_COMPATIBLE;
385 case SERIAL_CHIP_UNKNOWN:
387 spcr->interface_type = ACPI_DBG2_UNKNOWN;
391 /* Encode address space */
392 switch (serial_info.addr_space) {
393 case SERIAL_ADDRESS_SPACE_MEMORY:
394 space_id = ACPI_ADDRESS_SPACE_MEMORY;
396 case SERIAL_ADDRESS_SPACE_IO:
398 space_id = ACPI_ADDRESS_SPACE_IO;
402 serial_width = serial_info.reg_width * 8;
403 serial_offset = serial_info.reg_offset << serial_info.reg_shift;
404 serial_address = serial_info.addr + serial_offset;
406 /* Encode register access size */
407 switch (serial_info.reg_shift) {
409 access_size = ACPI_ACCESS_SIZE_BYTE_ACCESS;
412 access_size = ACPI_ACCESS_SIZE_WORD_ACCESS;
415 access_size = ACPI_ACCESS_SIZE_DWORD_ACCESS;
418 access_size = ACPI_ACCESS_SIZE_QWORD_ACCESS;
421 access_size = ACPI_ACCESS_SIZE_UNDEFINED;
425 debug("UART type %u @ %lx\n", spcr->interface_type, serial_address);
428 spcr->serial_port.space_id = space_id;
429 spcr->serial_port.bit_width = serial_width;
430 spcr->serial_port.bit_offset = 0;
431 spcr->serial_port.access_size = access_size;
432 spcr->serial_port.addrl = lower_32_bits(serial_address);
433 spcr->serial_port.addrh = upper_32_bits(serial_address);
435 /* Encode baud rate */
436 switch (serial_info.baudrate) {
454 serial_config = SERIAL_DEFAULT_CONFIG;
456 ret = serial_getconfig(dev, &serial_config);
458 spcr->parity = SERIAL_GET_PARITY(serial_config);
459 spcr->stop_bits = SERIAL_GET_STOP(serial_config);
461 /* No PCI devices for now */
462 spcr->pci_device_id = 0xffff;
463 spcr->pci_vendor_id = 0xffff;
466 * SPCR has no clue if the UART base clock speed is different
467 * to the default one. However, the SPCR 1.04 defines baud rate
468 * 0 as a preconfigured state of UART and OS is supposed not
469 * to touch the configuration of the serial device.
471 if (serial_info.clock != SERIAL_DEFAULT_CLOCK)
475 header->checksum = table_compute_checksum((void *)spcr, header->length);
479 * QEMU's version of write_acpi_tables is defined in drivers/misc/qfw.c
481 ulong write_acpi_tables(ulong start)
484 struct acpi_rsdp *rsdp;
485 struct acpi_rsdt *rsdt;
486 struct acpi_xsdt *xsdt;
487 struct acpi_facs *facs;
488 struct acpi_table_header *dsdt;
489 struct acpi_fadt *fadt;
490 struct acpi_mcfg *mcfg;
491 struct acpi_madt *madt;
492 struct acpi_csrt *csrt;
493 struct acpi_spcr *spcr;
498 /* Align ACPI tables to 16 byte */
499 current = ALIGN(current, 16);
501 debug("ACPI: Writing ACPI tables at %lx\n", start);
503 /* We need at least an RSDP and an RSDT Table */
504 rsdp = (struct acpi_rsdp *)current;
505 current += sizeof(struct acpi_rsdp);
506 current = ALIGN(current, 16);
507 rsdt = (struct acpi_rsdt *)current;
508 current += sizeof(struct acpi_rsdt);
509 current = ALIGN(current, 16);
510 xsdt = (struct acpi_xsdt *)current;
511 current += sizeof(struct acpi_xsdt);
513 * Per ACPI spec, the FACS table address must be aligned to a 64 byte
514 * boundary (Windows checks this, but Linux does not).
516 current = ALIGN(current, 64);
518 /* clear all table memory */
519 memset((void *)start, 0, current - start);
521 acpi_write_rsdp(rsdp, rsdt, xsdt);
522 acpi_write_rsdt(rsdt);
523 acpi_write_xsdt(xsdt);
525 debug("ACPI: * FACS\n");
526 facs = (struct acpi_facs *)current;
527 current += sizeof(struct acpi_facs);
528 current = ALIGN(current, 16);
530 acpi_create_facs(facs);
532 debug("ACPI: * DSDT\n");
533 dsdt = (struct acpi_table_header *)current;
534 memcpy(dsdt, &AmlCode, sizeof(struct acpi_table_header));
535 current += sizeof(struct acpi_table_header);
536 memcpy((char *)current,
537 (char *)&AmlCode + sizeof(struct acpi_table_header),
538 dsdt->length - sizeof(struct acpi_table_header));
539 current += dsdt->length - sizeof(struct acpi_table_header);
540 current = ALIGN(current, 16);
542 /* Pack GNVS into the ACPI table area */
543 for (i = 0; i < dsdt->length; i++) {
544 u32 *gnvs = (u32 *)((u32)dsdt + i);
545 if (*gnvs == ACPI_GNVS_ADDR) {
546 debug("Fix up global NVS in DSDT to 0x%08x\n", current);
552 /* Update DSDT checksum since we patched the GNVS address */
554 dsdt->checksum = table_compute_checksum((void *)dsdt, dsdt->length);
556 /* Fill in platform-specific global NVS variables */
557 acpi_create_gnvs((struct acpi_global_nvs *)current);
558 current += sizeof(struct acpi_global_nvs);
559 current = ALIGN(current, 16);
561 debug("ACPI: * FADT\n");
562 fadt = (struct acpi_fadt *)current;
563 current += sizeof(struct acpi_fadt);
564 current = ALIGN(current, 16);
565 acpi_create_fadt(fadt, facs, dsdt);
566 acpi_add_table(rsdp, fadt);
568 debug("ACPI: * MADT\n");
569 madt = (struct acpi_madt *)current;
570 acpi_create_madt(madt);
571 current += madt->header.length;
572 acpi_add_table(rsdp, madt);
573 current = ALIGN(current, 16);
575 debug("ACPI: * MCFG\n");
576 mcfg = (struct acpi_mcfg *)current;
577 acpi_create_mcfg(mcfg);
578 current += mcfg->header.length;
579 acpi_add_table(rsdp, mcfg);
580 current = ALIGN(current, 16);
582 debug("ACPI: * CSRT\n");
583 csrt = (struct acpi_csrt *)current;
584 acpi_create_csrt(csrt);
585 current += csrt->header.length;
586 acpi_add_table(rsdp, csrt);
587 current = ALIGN(current, 16);
589 debug("ACPI: * SPCR\n");
590 spcr = (struct acpi_spcr *)current;
591 acpi_create_spcr(spcr);
592 current += spcr->header.length;
593 acpi_add_table(rsdp, spcr);
594 current = ALIGN(current, 16);
596 debug("current = %x\n", current);
598 acpi_rsdp_addr = (unsigned long)rsdp;
599 debug("ACPI: done\n");
604 ulong acpi_get_rsdp_addr(void)
606 return acpi_rsdp_addr;