mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-14 17:07:38 +00:00
65 lines
1.5 KiB
C
65 lines
1.5 KiB
C
|
// SPDX-License-Identifier: GPL-2.0+
|
||
|
|
/*
|
||
|
|
* Write an ACPI MCFG table
|
||
|
|
*
|
||
|
|
* Copyright 2022 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>
|
||
|
|
|
||
|
|
int acpi_create_mcfg_mmconfig(struct acpi_mcfg_mmconfig *mmconfig, u32 base,
|
||
|
|
u16 seg_nr, u8 start, u8 end)
|
||
|
|
{
|
||
|
|
memset(mmconfig, 0, sizeof(*mmconfig));
|
||
|
|
mmconfig->base_address_l = base;
|
||
|
|
mmconfig->base_address_h = 0;
|
||
|
|
mmconfig->pci_segment_group_number = seg_nr;
|
||
|
|
mmconfig->start_bus_number = start;
|
||
|
|
mmconfig->end_bus_number = end;
|
||
|
|
|
||
|
|
return sizeof(struct acpi_mcfg_mmconfig);
|
||
|
|
}
|
||
|
|
|
||
|
|
__weak int acpi_fill_mcfg(struct acpi_ctx *ctx)
|
||
|
|
{
|
||
|
|
return -ENOENT;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* MCFG is defined in the PCI Firmware Specification 3.0 */
|
||
|
|
int acpi_write_mcfg(struct acpi_ctx *ctx, const struct acpi_writer *entry)
|
||
|
|
{
|
||
|
|
struct acpi_table_header *header;
|
||
|
|
struct acpi_mcfg *mcfg;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
mcfg = ctx->current;
|
||
|
|
header = &mcfg->header;
|
||
|
|
|
||
|
|
memset(mcfg, '\0', sizeof(struct acpi_mcfg));
|
||
|
|
|
||
|
|
/* Fill out header fields */
|
||
|
|
acpi_fill_header(header, "MCFG");
|
||
|
|
header->length = sizeof(struct acpi_mcfg);
|
||
|
|
header->revision = 1;
|
||
|
|
acpi_inc(ctx, sizeof(*mcfg));
|
||
|
|
|
||
|
|
ret = acpi_fill_mcfg(ctx);
|
||
|
|
if (ret)
|
||
|
|
return log_msg_ret("fill", ret);
|
||
|
|
|
||
|
|
/* (Re)calculate length and checksum */
|
||
|
|
header->length = (ulong)ctx->current - (ulong)mcfg;
|
||
|
|
header->checksum = table_compute_checksum(mcfg, header->length);
|
||
|
|
|
||
|
|
acpi_add_table(ctx, mcfg);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
ACPI_WRITER(5mcfg, "MCFG", acpi_write_mcfg, 0);
|