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bbc78592b1
Use acpi_update_checksum() for updating ACPI table header checksum. Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com> Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org> Reviewed-by: Matthias Brugger <mbrugger@suse.com>
49 lines
1,002 B
C
49 lines
1,002 B
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Write an ACPI Core System Resource Table (CSRT)
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*
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* Copyright 2021 Google LLC
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*/
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#define LOG_CATEGORY LOGC_ACPI
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#include <mapmem.h>
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#include <tables_csum.h>
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#include <acpi/acpi_table.h>
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#include <dm/acpi.h>
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#include <linux/string.h>
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__weak int acpi_fill_csrt(struct acpi_ctx *ctx)
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{
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return 0;
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}
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int acpi_write_csrt(struct acpi_ctx *ctx, const struct acpi_writer *entry)
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{
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struct acpi_table_header *header;
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struct acpi_csrt *csrt;
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int ret;
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csrt = ctx->current;
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header = &csrt->header;
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memset(csrt, '\0', sizeof(struct acpi_csrt));
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/* Fill out header fields */
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acpi_fill_header(header, "CSRT");
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header->revision = 0;
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acpi_inc(ctx, sizeof(*header));
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ret = acpi_fill_csrt(ctx);
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if (ret)
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return log_msg_ret("fill", ret);
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/* (Re)calculate length and checksum */
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header->length = (ulong)ctx->current - (ulong)csrt;
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acpi_update_checksum(header);
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acpi_add_table(ctx, csrt);
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return 0;
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}
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ACPI_WRITER(5csrt, "CSRT", acpi_write_csrt, 0);
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