diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/acpi/Makefile | 1 | ||||
| -rw-r--r-- | lib/acpi/csrt.c | 50 |
2 files changed, 51 insertions, 0 deletions
diff --git a/lib/acpi/Makefile b/lib/acpi/Makefile index 552d499fde4..f9b504988f2 100644 --- a/lib/acpi/Makefile +++ b/lib/acpi/Makefile @@ -10,6 +10,7 @@ obj-y += acpi_writer.o # With QEMU the ACPI tables come from there, not from U-Boot ifndef CONFIG_QEMU obj-y += base.o +obj-y += csrt.o # Sandbox does not build a .asl file ifndef CONFIG_SANDBOX diff --git a/lib/acpi/csrt.c b/lib/acpi/csrt.c new file mode 100644 index 00000000000..76069318416 --- /dev/null +++ b/lib/acpi/csrt.c @@ -0,0 +1,50 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Write an ACPI Core System Resource Table (CSRT) + * + * Copyright 2021 Google LLC + */ + +#define LOG_CATEGORY LOGC_ACPI + +#include <common.h> +#include <mapmem.h> +#include <tables_csum.h> +#include <acpi/acpi_table.h> +#include <dm/acpi.h> + +__weak u32 acpi_fill_csrt(u32 current) +{ + return 0; +} + +int acpi_write_csrt(struct acpi_ctx *ctx, const struct acpi_writer *entry) +{ + struct acpi_table_header *header; + struct acpi_csrt *csrt; + uint ptr; + + csrt = ctx->current; + header = &csrt->header; + + memset(csrt, '\0', sizeof(struct acpi_csrt)); + + /* Fill out header fields */ + acpi_fill_header(header, "CSRT"); + header->length = sizeof(struct acpi_csrt); + header->revision = 0; + + ptr = acpi_fill_csrt(map_to_sysmem(csrt)); + if (!ptr) + return log_msg_ret("fill", -ENOENT); + + /* (Re)calculate length and checksum */ + header->length = (ulong)ctx->current - (ulong)csrt; + header->checksum = table_compute_checksum(csrt, header->length); + + acpi_add_table(ctx, csrt); + acpi_inc(ctx, csrt->header.length); + + return 0; +} +ACPI_WRITER(5csrt, "CSRT", acpi_write_csrt, 0); |