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efi_loader: Install ACPI configuration tables

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ACPI tables can be passed via EFI configuration table to an EFI
application. This is only supported on x86 so far.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Bin Meng 2018-06-27 20:38:03 -07:00
parent bb68c7fba0
commit 86df34d42b
5 changed files with 60 additions and 0 deletions
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5
cmd/bootefi.c
View File

@ -61,6 +61,11 @@ efi_status_t efi_init_obj_list(void)
if (ret != EFI_SUCCESS)
goto out;
#endif
#ifdef CONFIG_GENERATE_ACPI_TABLE
ret = efi_acpi_register();
if (ret != EFI_SUCCESS)
goto out;
#endif
#ifdef CONFIG_GENERATE_SMBIOS_TABLE
ret = efi_smbios_register();
if (ret != EFI_SUCCESS)

4
include/efi_api.h
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@ -282,6 +282,10 @@ struct efi_runtime_services {
EFI_GUID(0xb1b621d5, 0xf19c, 0x41a5, \
0x83, 0x0b, 0xd9, 0x15, 0x2c, 0x69, 0xaa, 0xe0)
#define EFI_ACPI_TABLE_GUID \
EFI_GUID(0x8868e871, 0xe4f1, 0x11d3, \
0xbc, 0x22, 0x00, 0x80, 0xc7, 0x3c, 0x88, 0x81)
#define SMBIOS_TABLE_GUID \
EFI_GUID(0xeb9d2d31, 0x2d88, 0x11d3, \
0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)

8
include/efi_loader.h
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@ -214,6 +214,14 @@ efi_status_t efi_net_register(void);
/* Called by bootefi to make the watchdog available */
efi_status_t efi_watchdog_register(void);
/* Called by bootefi to make SMBIOS tables available */
/**
* efi_acpi_register() - write out ACPI tables
*
* Called by bootefi to make ACPI tables available
*
* @return 0 if OK, -ENOMEM if no memory is available for the tables
*/
efi_status_t efi_acpi_register(void);
/**
* efi_smbios_register() - write out SMBIOS tables
*

1
lib/efi_loader/Makefile
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@ -22,4 +22,5 @@ obj-$(CONFIG_LCD) += efi_gop.o
obj-$(CONFIG_DM_VIDEO) += efi_gop.o
obj-$(CONFIG_PARTITIONS) += efi_disk.o
obj-$(CONFIG_NET) += efi_net.o
obj-$(CONFIG_GENERATE_ACPI_TABLE) += efi_acpi.o
obj-$(CONFIG_GENERATE_SMBIOS_TABLE) += efi_smbios.o

42
lib/efi_loader/efi_acpi.c Normal file
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@ -0,0 +1,42 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* EFI application ACPI tables support
*
* Copyright (C) 2018, Bin Meng <bmeng.cn@gmail.com>
*/
#include <common.h>
#include <efi_loader.h>
#include <asm/acpi_table.h>
static const efi_guid_t acpi_guid = EFI_ACPI_TABLE_GUID;
/*
* Install the ACPI table as a configuration table.
*
* @return status code
*/
efi_status_t efi_acpi_register(void)
{
/* Map within the low 32 bits, to allow for 32bit ACPI tables */
u64 acpi = U32_MAX;
efi_status_t ret;
/* Reserve 64kiB page for ACPI */
ret = efi_allocate_pages(EFI_ALLOCATE_MAX_ADDRESS,
EFI_RUNTIME_SERVICES_DATA, 16, &acpi);
if (ret != EFI_SUCCESS)
return ret;
/*
* Generate ACPI tables - we know that efi_allocate_pages() returns
* a 4k-aligned address, so it is safe to assume that
* write_acpi_tables() will write the table at that address.
*/
assert(!(acpi & 0xf));
write_acpi_tables(acpi);
/* And expose them to our EFI payload */
return efi_install_configuration_table(&acpi_guid,
(void *)(uintptr_t)acpi);
}