projects / J-u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| d9531375 SG |
1 | // SPDX-License-Identifier: GPL-2.0+ |
| 2 | /* | |
| 3 | * Write an ACPI Secondary System Descriptor Table (SSDT) table | |
| 4 | * | |
| 5 | * Copyright 2021 Google LLC | |
| 6 | */ | |
| 7 | ||
| 8 | #define LOG_CATEGORY LOGC_ACPI | |
| 9 | ||
| 10 | #include <common.h> | |
| 11 | #include <acpi/acpi_table.h> | |
| 12 | #include <dm/acpi.h> | |
| 13 | #include <tables_csum.h> | |
| 14 | ||
| 15 | int acpi_write_ssdt(struct acpi_ctx *ctx, const struct acpi_writer *entry) | |
| 16 | { | |
| 17 | struct acpi_table_header *ssdt; | |
| 18 | int ret; | |
| 19 | ||
| 20 | ssdt = ctx->current; | |
| 21 | memset((void *)ssdt, '\0', sizeof(struct acpi_table_header)); | |
| 22 | ||
| 23 | acpi_fill_header(ssdt, "SSDT"); | |
| 24 | memcpy(ssdt->oem_table_id, OEM_TABLE_ID, sizeof(ssdt->oem_table_id)); | |
| 25 | ssdt->revision = acpi_get_table_revision(ACPITAB_SSDT); | |
| 26 | ssdt->aslc_revision = 1; | |
| 27 | ssdt->length = sizeof(struct acpi_table_header); | |
| 28 | ||
| 29 | acpi_inc(ctx, sizeof(struct acpi_table_header)); | |
| 30 | ||
| 31 | ret = acpi_fill_ssdt(ctx); | |
| 32 | if (ret) { | |
| 33 | ctx->current = ssdt; | |
| 34 | return log_msg_ret("fill", ret); | |
| 35 | } | |
| 36 | ||
| 37 | /* (Re)calculate length and checksum */ | |
| 38 | ssdt->length = ctx->current - (void *)ssdt; | |
| 39 | ssdt->checksum = table_compute_checksum((void *)ssdt, ssdt->length); | |
| 40 | log_debug("SSDT at %p, length %x\n", ssdt, ssdt->length); | |
| 41 | ||
| 42 | /* Drop the table if it is empty */ | |
| 43 | if (ssdt->length == sizeof(struct acpi_table_header)) | |
| 44 | return log_msg_ret("fill", -ENOENT); | |
| 45 | acpi_add_table(ctx, ssdt); | |
| 46 | ||
| 47 | return 0; | |
| 48 | } | |
| 49 | ACPI_WRITER(6ssdt, "SSDT", acpi_write_ssdt, 0); |