| Simon Glass | e9f6e6a | 2021-12-01 09:02:50 -0700 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0+ |
| 2 | /* |
| 3 | * Write base ACPI tables |
| 4 | * |
| 5 | * Copyright 2021 Google LLC |
| 6 | */ |
| 7 | |
| Simon Glass | 83c3cb5 | 2021-12-01 09:02:52 -0700 | [diff] [blame] | 8 | #define LOG_CATEGORY LOGC_ACPI |
| 9 | |
| Simon Glass | e9f6e6a | 2021-12-01 09:02:50 -0700 | [diff] [blame] | 10 | #include <common.h> |
| 11 | #include <acpi/acpi_table.h> |
| 12 | #include <dm/acpi.h> |
| 13 | #include <mapmem.h> |
| 14 | #include <tables_csum.h> |
| 15 | |
| 16 | void acpi_write_rsdp(struct acpi_rsdp *rsdp, struct acpi_rsdt *rsdt, |
| 17 | struct acpi_xsdt *xsdt) |
| 18 | { |
| 19 | memset(rsdp, 0, sizeof(struct acpi_rsdp)); |
| 20 | |
| 21 | memcpy(rsdp->signature, RSDP_SIG, 8); |
| 22 | memcpy(rsdp->oem_id, OEM_ID, 6); |
| 23 | |
| 24 | rsdp->length = sizeof(struct acpi_rsdp); |
| 25 | rsdp->rsdt_address = map_to_sysmem(rsdt); |
| 26 | |
| 27 | rsdp->xsdt_address = map_to_sysmem(xsdt); |
| 28 | rsdp->revision = ACPI_RSDP_REV_ACPI_2_0; |
| 29 | |
| 30 | /* Calculate checksums */ |
| 31 | rsdp->checksum = table_compute_checksum(rsdp, 20); |
| 32 | rsdp->ext_checksum = table_compute_checksum(rsdp, |
| 33 | sizeof(struct acpi_rsdp)); |
| 34 | } |
| 35 | |
| 36 | static void acpi_write_rsdt(struct acpi_rsdt *rsdt) |
| 37 | { |
| 38 | struct acpi_table_header *header = &rsdt->header; |
| 39 | |
| 40 | /* Fill out header fields */ |
| 41 | acpi_fill_header(header, "RSDT"); |
| 42 | header->length = sizeof(struct acpi_rsdt); |
| 43 | header->revision = 1; |
| 44 | |
| 45 | /* Entries are filled in later, we come with an empty set */ |
| 46 | |
| 47 | /* Fix checksum */ |
| 48 | header->checksum = table_compute_checksum(rsdt, |
| 49 | sizeof(struct acpi_rsdt)); |
| 50 | } |
| 51 | |
| 52 | static void acpi_write_xsdt(struct acpi_xsdt *xsdt) |
| 53 | { |
| 54 | struct acpi_table_header *header = &xsdt->header; |
| 55 | |
| 56 | /* Fill out header fields */ |
| 57 | acpi_fill_header(header, "XSDT"); |
| 58 | header->length = sizeof(struct acpi_xsdt); |
| 59 | header->revision = 1; |
| 60 | |
| 61 | /* Entries are filled in later, we come with an empty set */ |
| 62 | |
| 63 | /* Fix checksum */ |
| 64 | header->checksum = table_compute_checksum(xsdt, |
| 65 | sizeof(struct acpi_xsdt)); |
| 66 | } |
| 67 | |
| 68 | static int acpi_write_base(struct acpi_ctx *ctx, |
| 69 | const struct acpi_writer *entry) |
| 70 | { |
| 71 | /* We need at least an RSDP and an RSDT Table */ |
| 72 | ctx->rsdp = ctx->current; |
| 73 | acpi_inc_align(ctx, sizeof(struct acpi_rsdp)); |
| 74 | ctx->rsdt = ctx->current; |
| 75 | acpi_inc_align(ctx, sizeof(struct acpi_rsdt)); |
| 76 | ctx->xsdt = ctx->current; |
| 77 | acpi_inc_align(ctx, sizeof(struct acpi_xsdt)); |
| 78 | |
| 79 | /* clear all table memory */ |
| 80 | memset(ctx->base, '\0', ctx->current - ctx->base); |
| 81 | |
| 82 | acpi_write_rsdp(ctx->rsdp, ctx->rsdt, ctx->xsdt); |
| 83 | acpi_write_rsdt(ctx->rsdt); |
| 84 | acpi_write_xsdt(ctx->xsdt); |
| 85 | |
| 86 | return 0; |
| 87 | } |
| 88 | /* |
| 89 | * Per ACPI spec, the FACS table address must be aligned to a 64-byte boundary |
| 90 | * (Windows checks this, but Linux does not). |
| 91 | * |
| 92 | * Use the '0' prefix to put this one first |
| 93 | */ |
| 94 | ACPI_WRITER(0base, NULL, acpi_write_base, ACPIWF_ALIGN64); |