mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-28 15:41:40 +00:00
50 lines
1.3 KiB
C
50 lines
1.3 KiB
C
|
// 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 <common.h>
|
||
|
|
#include <acpi/acpi_table.h>
|
||
|
|
#include <dm/acpi.h>
|
||
|
|
#include <tables_csum.h>
|
||
|
|
|
||
|
|
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);
|