266 lines
6.4 KiB
C
266 lines
6.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Generic code used to generate ACPI tables
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*
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* Copyright 2019 Google LLC
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*/
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#include <common.h>
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#include <dm.h>
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#include <cpu.h>
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#include <log.h>
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#include <mapmem.h>
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#include <tables_csum.h>
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#include <version.h>
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#include <acpi/acpi_table.h>
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#include <dm/acpi.h>
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int acpi_create_dmar(struct acpi_dmar *dmar, enum dmar_flags flags)
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{
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struct acpi_table_header *header = &dmar->header;
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struct cpu_info info;
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struct udevice *cpu;
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int ret;
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ret = uclass_first_device(UCLASS_CPU, &cpu);
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if (ret)
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return log_msg_ret("cpu", ret);
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ret = cpu_get_info(cpu, &info);
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if (ret)
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return log_msg_ret("info", ret);
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memset((void *)dmar, 0, sizeof(struct acpi_dmar));
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/* Fill out header fields. */
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acpi_fill_header(&dmar->header, "DMAR");
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header->length = sizeof(struct acpi_dmar);
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header->revision = acpi_get_table_revision(ACPITAB_DMAR);
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dmar->host_address_width = info.address_width - 1;
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dmar->flags = flags;
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return 0;
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}
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int acpi_get_table_revision(enum acpi_tables table)
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{
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switch (table) {
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case ACPITAB_FADT:
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return ACPI_FADT_REV_ACPI_3_0;
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case ACPITAB_MADT:
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return ACPI_MADT_REV_ACPI_3_0;
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case ACPITAB_MCFG:
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return ACPI_MCFG_REV_ACPI_3_0;
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case ACPITAB_TCPA:
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/* This version and the rest are open-coded */
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return 2;
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case ACPITAB_TPM2:
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return 4;
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case ACPITAB_SSDT: /* ACPI 3.0 upto 6.3: 2 */
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return 2;
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case ACPITAB_SRAT: /* ACPI 2.0: 1, ACPI 3.0: 2, ACPI 4.0 to 6.3: 3 */
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return 1; /* TODO Should probably be upgraded to 2 */
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case ACPITAB_DMAR:
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return 1;
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case ACPITAB_SLIT: /* ACPI 2.0 upto 6.3: 1 */
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return 1;
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case ACPITAB_SPMI: /* IMPI 2.0 */
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return 5;
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case ACPITAB_HPET: /* Currently 1. Table added in ACPI 2.0 */
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return 1;
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case ACPITAB_VFCT: /* ACPI 2.0/3.0/4.0: 1 */
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return 1;
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case ACPITAB_IVRS:
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return IVRS_FORMAT_FIXED;
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case ACPITAB_DBG2:
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return 0;
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case ACPITAB_FACS: /* ACPI 2.0/3.0: 1, ACPI 4.0 to 6.3: 2 */
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return 1;
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case ACPITAB_RSDT: /* ACPI 1.0 upto 6.3: 1 */
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return 1;
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case ACPITAB_XSDT: /* ACPI 2.0 upto 6.3: 1 */
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return 1;
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case ACPITAB_RSDP: /* ACPI 2.0 upto 6.3: 2 */
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return 2;
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case ACPITAB_HEST:
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return 1;
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case ACPITAB_NHLT:
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return 5;
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case ACPITAB_BERT:
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return 1;
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case ACPITAB_SPCR:
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return 2;
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default:
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return -EINVAL;
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}
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}
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void acpi_fill_header(struct acpi_table_header *header, char *signature)
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{
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memcpy(header->signature, signature, 4);
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memcpy(header->oem_id, OEM_ID, 6);
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memcpy(header->oem_table_id, OEM_TABLE_ID, 8);
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header->oem_revision = U_BOOT_BUILD_DATE;
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memcpy(header->aslc_id, ASLC_ID, 4);
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}
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void acpi_align(struct acpi_ctx *ctx)
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{
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ctx->current = (void *)ALIGN((ulong)ctx->current, 16);
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}
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void acpi_align64(struct acpi_ctx *ctx)
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{
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ctx->current = (void *)ALIGN((ulong)ctx->current, 64);
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}
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void acpi_inc(struct acpi_ctx *ctx, uint amount)
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{
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ctx->current += amount;
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}
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void acpi_inc_align(struct acpi_ctx *ctx, uint amount)
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{
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ctx->current += amount;
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acpi_align(ctx);
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}
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/**
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* Add an ACPI table to the RSDT (and XSDT) structure, recalculate length
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* and checksum.
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*/
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int acpi_add_table(struct acpi_ctx *ctx, void *table)
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{
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int i, entries_num;
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struct acpi_rsdt *rsdt;
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struct acpi_xsdt *xsdt;
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/* The RSDT is mandatory while the XSDT is not */
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rsdt = ctx->rsdt;
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/* This should always be MAX_ACPI_TABLES */
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entries_num = ARRAY_SIZE(rsdt->entry);
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for (i = 0; i < entries_num; i++) {
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if (rsdt->entry[i] == 0)
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break;
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}
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if (i >= entries_num) {
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log_err("ACPI: Error: too many tables\n");
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return -E2BIG;
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}
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/* Add table to the RSDT */
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rsdt->entry[i] = map_to_sysmem(table);
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/* Fix RSDT length or the kernel will assume invalid entries */
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rsdt->header.length = sizeof(struct acpi_table_header) +
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(sizeof(u32) * (i + 1));
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/* Re-calculate checksum */
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rsdt->header.checksum = 0;
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rsdt->header.checksum = table_compute_checksum((u8 *)rsdt,
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rsdt->header.length);
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/*
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* And now the same thing for the XSDT. We use the same index as for
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* now we want the XSDT and RSDT to always be in sync in U-Boot
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*/
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xsdt = ctx->xsdt;
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/* Add table to the XSDT */
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xsdt->entry[i] = map_to_sysmem(table);
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/* Fix XSDT length */
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xsdt->header.length = sizeof(struct acpi_table_header) +
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(sizeof(u64) * (i + 1));
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/* Re-calculate checksum */
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xsdt->header.checksum = 0;
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xsdt->header.checksum = table_compute_checksum((u8 *)xsdt,
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xsdt->header.length);
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return 0;
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}
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static void acpi_write_rsdp(struct acpi_rsdp *rsdp, struct acpi_rsdt *rsdt,
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struct acpi_xsdt *xsdt)
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{
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memset(rsdp, 0, sizeof(struct acpi_rsdp));
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memcpy(rsdp->signature, RSDP_SIG, 8);
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memcpy(rsdp->oem_id, OEM_ID, 6);
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rsdp->length = sizeof(struct acpi_rsdp);
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rsdp->rsdt_address = map_to_sysmem(rsdt);
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rsdp->xsdt_address = map_to_sysmem(xsdt);
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rsdp->revision = ACPI_RSDP_REV_ACPI_2_0;
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/* Calculate checksums */
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rsdp->checksum = table_compute_checksum(rsdp, 20);
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rsdp->ext_checksum = table_compute_checksum(rsdp,
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sizeof(struct acpi_rsdp));
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}
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static void acpi_write_rsdt(struct acpi_rsdt *rsdt)
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{
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struct acpi_table_header *header = &rsdt->header;
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/* Fill out header fields */
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acpi_fill_header(header, "RSDT");
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header->length = sizeof(struct acpi_rsdt);
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header->revision = 1;
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/* Entries are filled in later, we come with an empty set */
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/* Fix checksum */
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header->checksum = table_compute_checksum(rsdt,
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sizeof(struct acpi_rsdt));
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}
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static void acpi_write_xsdt(struct acpi_xsdt *xsdt)
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{
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struct acpi_table_header *header = &xsdt->header;
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/* Fill out header fields */
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acpi_fill_header(header, "XSDT");
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header->length = sizeof(struct acpi_xsdt);
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header->revision = 1;
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/* Entries are filled in later, we come with an empty set */
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/* Fix checksum */
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header->checksum = table_compute_checksum(xsdt,
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sizeof(struct acpi_xsdt));
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}
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void acpi_setup_base_tables(struct acpi_ctx *ctx, void *start)
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{
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ctx->current = start;
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/* Align ACPI tables to 16 byte */
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acpi_align(ctx);
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gd->arch.acpi_start = map_to_sysmem(ctx->current);
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/* We need at least an RSDP and an RSDT Table */
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ctx->rsdp = ctx->current;
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acpi_inc_align(ctx, sizeof(struct acpi_rsdp));
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ctx->rsdt = ctx->current;
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acpi_inc_align(ctx, sizeof(struct acpi_rsdt));
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ctx->xsdt = ctx->current;
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acpi_inc_align(ctx, sizeof(struct acpi_xsdt));
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/* clear all table memory */
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memset((void *)start, '\0', ctx->current - start);
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acpi_write_rsdp(ctx->rsdp, ctx->rsdt, ctx->xsdt);
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acpi_write_rsdt(ctx->rsdt);
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acpi_write_xsdt(ctx->xsdt);
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/*
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* Per ACPI spec, the FACS table address must be aligned to a 64 byte
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* boundary (Windows checks this, but Linux does not).
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*/
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acpi_align64(ctx);
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}
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