2 * Based on acpi.c from coreboot
4 * Copyright (C) 2015, Saket Sinha <saket.sinha89@gmail.com>
5 * Copyright (C) 2016, Bin Meng <bmeng.cn@gmail.com>
7 * SPDX-License-Identifier: GPL-2.0+
13 #include <dm/uclass-internal.h>
14 #include <asm/acpi_table.h>
15 #include <asm/lapic.h>
16 #include <asm/tables.h>
19 * IASL compiles the dsdt entries and writes the hex values
20 * to a C array AmlCode[] (see dsdt.c).
22 extern const unsigned char AmlCode[];
24 static void acpi_write_rsdp(struct acpi_rsdp *rsdp, struct acpi_rsdt *rsdt,
25 struct acpi_xsdt *xsdt)
27 memset(rsdp, 0, sizeof(struct acpi_rsdp));
29 memcpy(rsdp->signature, RSDP_SIG, 8);
30 memcpy(rsdp->oem_id, OEM_ID, 6);
32 rsdp->length = sizeof(struct acpi_rsdp);
33 rsdp->rsdt_address = (u32)rsdt;
36 * Revision: ACPI 1.0: 0, ACPI 2.0/3.0/4.0: 2
38 * Some OSes expect an XSDT to be present for RSD PTR revisions >= 2.
39 * If we don't have an ACPI XSDT, force ACPI 1.0 (and thus RSD PTR
43 rsdp->revision = ACPI_RSDP_REV_ACPI_1_0;
45 rsdp->xsdt_address = (u64)(u32)xsdt;
46 rsdp->revision = ACPI_RSDP_REV_ACPI_2_0;
49 /* Calculate checksums */
50 rsdp->checksum = table_compute_checksum((void *)rsdp, 20);
51 rsdp->ext_checksum = table_compute_checksum((void *)rsdp,
52 sizeof(struct acpi_rsdp));
55 void acpi_fill_header(struct acpi_table_header *header, char *signature)
57 memcpy(header->signature, signature, 4);
58 memcpy(header->oem_id, OEM_ID, 6);
59 memcpy(header->oem_table_id, OEM_TABLE_ID, 8);
60 memcpy(header->aslc_id, ASLC_ID, 4);
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);
71 /* ACPI 1.0/2.0: 1, ACPI 3.0: 2, ACPI 4.0: 3 */
72 header->revision = ACPI_REV_ACPI_2_0;
74 /* Entries are filled in later, we come with an empty set */
77 header->checksum = table_compute_checksum((void *)rsdt,
78 sizeof(struct acpi_rsdt));
81 static void acpi_write_xsdt(struct acpi_xsdt *xsdt)
83 struct acpi_table_header *header = &(xsdt->header);
85 /* Fill out header fields */
86 acpi_fill_header(header, "XSDT");
87 header->length = sizeof(struct acpi_xsdt);
89 /* ACPI 1.0/2.0: 1, ACPI 3.0: 2, ACPI 4.0: 3 */
90 header->revision = ACPI_REV_ACPI_2_0;
92 /* Entries are filled in later, we come with an empty set */
95 header->checksum = table_compute_checksum((void *)xsdt,
96 sizeof(struct acpi_xsdt));
100 * Add an ACPI table to the RSDT (and XSDT) structure, recalculate length
103 static void acpi_add_table(struct acpi_rsdp *rsdp, void *table)
106 struct acpi_rsdt *rsdt;
107 struct acpi_xsdt *xsdt = NULL;
109 /* The RSDT is mandatory while the XSDT is not */
110 rsdt = (struct acpi_rsdt *)rsdp->rsdt_address;
112 if (rsdp->xsdt_address)
113 xsdt = (struct acpi_xsdt *)((u32)rsdp->xsdt_address);
115 /* This should always be MAX_ACPI_TABLES */
116 entries_num = ARRAY_SIZE(rsdt->entry);
118 for (i = 0; i < entries_num; i++) {
119 if (rsdt->entry[i] == 0)
123 if (i >= entries_num) {
124 debug("ACPI: Error: too many tables\n");
128 /* Add table to the RSDT */
129 rsdt->entry[i] = (u32)table;
131 /* Fix RSDT length or the kernel will assume invalid entries */
132 rsdt->header.length = sizeof(struct acpi_table_header) +
133 (sizeof(u32) * (i + 1));
135 /* Re-calculate checksum */
136 rsdt->header.checksum = 0;
137 rsdt->header.checksum = table_compute_checksum((u8 *)rsdt,
138 rsdt->header.length);
141 * And now the same thing for the XSDT. We use the same index as for
142 * now we want the XSDT and RSDT to always be in sync in U-Boot
145 /* Add table to the XSDT */
146 xsdt->entry[i] = (u64)(u32)table;
148 /* Fix XSDT length */
149 xsdt->header.length = sizeof(struct acpi_table_header) +
150 (sizeof(u64) * (i + 1));
152 /* Re-calculate checksum */
153 xsdt->header.checksum = 0;
154 xsdt->header.checksum = table_compute_checksum((u8 *)xsdt,
155 xsdt->header.length);
159 static void acpi_create_facs(struct acpi_facs *facs)
161 memset((void *)facs, 0, sizeof(struct acpi_facs));
163 memcpy(facs->signature, "FACS", 4);
164 facs->length = sizeof(struct acpi_facs);
165 facs->hardware_signature = 0;
166 facs->firmware_waking_vector = 0;
167 facs->global_lock = 0;
169 facs->x_firmware_waking_vector_l = 0;
170 facs->x_firmware_waking_vector_h = 0;
174 static int acpi_create_madt_lapic(struct acpi_madt_lapic *lapic,
177 lapic->type = ACPI_APIC_LAPIC;
178 lapic->length = sizeof(struct acpi_madt_lapic);
179 lapic->flags = LOCAL_APIC_FLAG_ENABLED;
180 lapic->processor_id = cpu;
181 lapic->apic_id = apic;
183 return lapic->length;
186 u32 acpi_create_madt_lapics(u32 current)
190 for (uclass_find_first_device(UCLASS_CPU, &dev);
192 uclass_find_next_device(&dev)) {
193 struct cpu_platdata *plat = dev_get_parent_platdata(dev);
195 current += acpi_create_madt_lapic(
196 (struct acpi_madt_lapic *)current,
197 plat->cpu_id, plat->cpu_id);
203 int acpi_create_madt_ioapic(struct acpi_madt_ioapic *ioapic, u8 id,
204 u32 addr, u32 gsi_base)
206 ioapic->type = ACPI_APIC_IOAPIC;
207 ioapic->length = sizeof(struct acpi_madt_ioapic);
208 ioapic->reserved = 0x00;
209 ioapic->gsi_base = gsi_base;
210 ioapic->ioapic_id = id;
211 ioapic->ioapic_addr = addr;
213 return ioapic->length;
216 int acpi_create_madt_irqoverride(struct acpi_madt_irqoverride *irqoverride,
217 u8 bus, u8 source, u32 gsirq, u16 flags)
219 irqoverride->type = ACPI_APIC_IRQ_SRC_OVERRIDE;
220 irqoverride->length = sizeof(struct acpi_madt_irqoverride);
221 irqoverride->bus = bus;
222 irqoverride->source = source;
223 irqoverride->gsirq = gsirq;
224 irqoverride->flags = flags;
226 return irqoverride->length;
229 int acpi_create_madt_lapic_nmi(struct acpi_madt_lapic_nmi *lapic_nmi,
230 u8 cpu, u16 flags, u8 lint)
232 lapic_nmi->type = ACPI_APIC_LAPIC_NMI;
233 lapic_nmi->length = sizeof(struct acpi_madt_lapic_nmi);
234 lapic_nmi->flags = flags;
235 lapic_nmi->processor_id = cpu;
236 lapic_nmi->lint = lint;
238 return lapic_nmi->length;
241 static void acpi_create_madt(struct acpi_madt *madt)
243 struct acpi_table_header *header = &(madt->header);
244 u32 current = (u32)madt + sizeof(struct acpi_madt);
246 memset((void *)madt, 0, sizeof(struct acpi_madt));
248 /* Fill out header fields */
249 acpi_fill_header(header, "APIC");
250 header->length = sizeof(struct acpi_madt);
252 /* ACPI 1.0/2.0: 1, ACPI 3.0: 2, ACPI 4.0: 3 */
253 header->revision = ACPI_REV_ACPI_2_0;
255 madt->lapic_addr = LAPIC_DEFAULT_BASE;
256 madt->flags = ACPI_MADT_PCAT_COMPAT;
258 current = acpi_fill_madt(current);
260 /* (Re)calculate length and checksum */
261 header->length = current - (u32)madt;
263 header->checksum = table_compute_checksum((void *)madt, header->length);
266 static int acpi_create_mcfg_mmconfig(struct acpi_mcfg_mmconfig *mmconfig,
267 u32 base, u16 seg_nr, u8 start, u8 end)
269 memset(mmconfig, 0, sizeof(*mmconfig));
270 mmconfig->base_address_l = base;
271 mmconfig->base_address_h = 0;
272 mmconfig->pci_segment_group_number = seg_nr;
273 mmconfig->start_bus_number = start;
274 mmconfig->end_bus_number = end;
276 return sizeof(struct acpi_mcfg_mmconfig);
279 static u32 acpi_fill_mcfg(u32 current)
281 current += acpi_create_mcfg_mmconfig
282 ((struct acpi_mcfg_mmconfig *)current,
283 CONFIG_PCIE_ECAM_BASE, 0x0, 0x0, 255);
288 /* MCFG is defined in the PCI Firmware Specification 3.0 */
289 static void acpi_create_mcfg(struct acpi_mcfg *mcfg)
291 struct acpi_table_header *header = &(mcfg->header);
292 u32 current = (u32)mcfg + sizeof(struct acpi_mcfg);
294 memset((void *)mcfg, 0, sizeof(struct acpi_mcfg));
296 /* Fill out header fields */
297 acpi_fill_header(header, "MCFG");
298 header->length = sizeof(struct acpi_mcfg);
300 /* ACPI 1.0/2.0: 1, ACPI 3.0: 2, ACPI 4.0: 3 */
301 header->revision = ACPI_REV_ACPI_2_0;
303 current = acpi_fill_mcfg(current);
305 /* (Re)calculate length and checksum */
306 header->length = current - (u32)mcfg;
307 header->checksum = table_compute_checksum((void *)mcfg, header->length);
311 * QEMU's version of write_acpi_tables is defined in
312 * arch/x86/cpu/qemu/fw_cfg.c
314 u32 write_acpi_tables(u32 start)
317 struct acpi_rsdp *rsdp;
318 struct acpi_rsdt *rsdt;
319 struct acpi_xsdt *xsdt;
320 struct acpi_facs *facs;
321 struct acpi_table_header *dsdt;
322 struct acpi_fadt *fadt;
323 struct acpi_mcfg *mcfg;
324 struct acpi_madt *madt;
328 /* Align ACPI tables to 16 byte */
329 current = ALIGN(current, 16);
331 debug("ACPI: Writing ACPI tables at %x\n", start);
333 /* We need at least an RSDP and an RSDT Table */
334 rsdp = (struct acpi_rsdp *)current;
335 current += sizeof(struct acpi_rsdp);
336 current = ALIGN(current, 16);
337 rsdt = (struct acpi_rsdt *)current;
338 current += sizeof(struct acpi_rsdt);
339 current = ALIGN(current, 16);
340 xsdt = (struct acpi_xsdt *)current;
341 current += sizeof(struct acpi_xsdt);
343 * Per ACPI spec, the FACS table address must be aligned to a 64 byte
344 * boundary (Windows checks this, but Linux does not).
346 current = ALIGN(current, 64);
348 /* clear all table memory */
349 memset((void *)start, 0, current - start);
351 acpi_write_rsdp(rsdp, rsdt, xsdt);
352 acpi_write_rsdt(rsdt);
353 acpi_write_xsdt(xsdt);
355 debug("ACPI: * FACS\n");
356 facs = (struct acpi_facs *)current;
357 current += sizeof(struct acpi_facs);
358 current = ALIGN(current, 16);
360 acpi_create_facs(facs);
362 debug("ACPI: * DSDT\n");
363 dsdt = (struct acpi_table_header *)current;
364 memcpy(dsdt, &AmlCode, sizeof(struct acpi_table_header));
365 if (dsdt->length >= sizeof(struct acpi_table_header)) {
366 current += sizeof(struct acpi_table_header);
367 memcpy((char *)current,
368 (char *)&AmlCode + sizeof(struct acpi_table_header),
369 dsdt->length - sizeof(struct acpi_table_header));
370 current += dsdt->length - sizeof(struct acpi_table_header);
372 /* (Re)calculate length and checksum */
373 dsdt->length = current - (u32)dsdt;
375 dsdt->checksum = table_compute_checksum((void *)dsdt,
378 current = ALIGN(current, 16);
380 debug("ACPI: * FADT\n");
381 fadt = (struct acpi_fadt *)current;
382 current += sizeof(struct acpi_fadt);
383 current = ALIGN(current, 16);
384 acpi_create_fadt(fadt, facs, dsdt);
385 acpi_add_table(rsdp, fadt);
387 debug("ACPI: * MADT\n");
388 madt = (struct acpi_madt *)current;
389 acpi_create_madt(madt);
390 if (madt->header.length > sizeof(struct acpi_madt)) {
391 current += madt->header.length;
392 acpi_add_table(rsdp, madt);
394 current = ALIGN(current, 16);
396 debug("ACPI: * MCFG\n");
397 mcfg = (struct acpi_mcfg *)current;
398 acpi_create_mcfg(mcfg);
399 if (mcfg->header.length > sizeof(struct acpi_mcfg)) {
400 current += mcfg->header.length;
401 current = ALIGN(current, 16);
402 acpi_add_table(rsdp, mcfg);
405 debug("current = %x\n", current);
407 debug("ACPI: done\n");