From d953137526cce48002ef1e313592d28b66cc9c48 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Wed, 1 Dec 2021 09:02:56 -0700 Subject: x86: Move SSDT table to a writer function Move this table over to use a writer function, moving the code from the x86 implementation. Signed-off-by: Simon Glass --- lib/acpi/Makefile | 1 + lib/acpi/ssdt.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 50 insertions(+) create mode 100644 lib/acpi/ssdt.c (limited to 'lib') diff --git a/lib/acpi/Makefile b/lib/acpi/Makefile index ccdf42896d..552d499fde 100644 --- a/lib/acpi/Makefile +++ b/lib/acpi/Makefile @@ -17,4 +17,5 @@ obj-y += dsdt.o endif obj-y += facs.o +obj-y += ssdt.o endif diff --git a/lib/acpi/ssdt.c b/lib/acpi/ssdt.c new file mode 100644 index 0000000000..659c1aad40 --- /dev/null +++ b/lib/acpi/ssdt.c @@ -0,0 +1,49 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Write an ACPI Secondary System Descriptor Table (SSDT) table + * + * Copyright 2021 Google LLC + */ + +#define LOG_CATEGORY LOGC_ACPI + +#include +#include +#include +#include + +int acpi_write_ssdt(struct acpi_ctx *ctx, const struct acpi_writer *entry) +{ + struct acpi_table_header *ssdt; + int ret; + + ssdt = ctx->current; + memset((void *)ssdt, '\0', sizeof(struct acpi_table_header)); + + acpi_fill_header(ssdt, "SSDT"); + memcpy(ssdt->oem_table_id, OEM_TABLE_ID, sizeof(ssdt->oem_table_id)); + ssdt->revision = acpi_get_table_revision(ACPITAB_SSDT); + ssdt->aslc_revision = 1; + ssdt->length = sizeof(struct acpi_table_header); + + acpi_inc(ctx, sizeof(struct acpi_table_header)); + + ret = acpi_fill_ssdt(ctx); + if (ret) { + ctx->current = ssdt; + return log_msg_ret("fill", ret); + } + + /* (Re)calculate length and checksum */ + ssdt->length = ctx->current - (void *)ssdt; + ssdt->checksum = table_compute_checksum((void *)ssdt, ssdt->length); + log_debug("SSDT at %p, length %x\n", ssdt, ssdt->length); + + /* Drop the table if it is empty */ + if (ssdt->length == sizeof(struct acpi_table_header)) + return log_msg_ret("fill", -ENOENT); + acpi_add_table(ctx, ssdt); + + return 0; +} +ACPI_WRITER(6ssdt, "SSDT", acpi_write_ssdt, 0); -- cgit v1.2.3