diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/efi_loader/Makefile | 1 | ||||
| -rw-r--r-- | lib/efi_loader/efi_acpi.c | 42 | ||||
| -rw-r--r-- | lib/efi_loader/efi_boottime.c | 2 | ||||
| -rw-r--r-- | lib/efi_loader/helloworld.c | 4 |
4 files changed, 48 insertions, 1 deletions
diff --git a/lib/efi_loader/Makefile b/lib/efi_loader/Makefile index c6046e36d2..d6402c4615 100644 --- a/lib/efi_loader/Makefile +++ b/lib/efi_loader/Makefile @@ -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 diff --git a/lib/efi_loader/efi_acpi.c b/lib/efi_loader/efi_acpi.c new file mode 100644 index 0000000000..a4e5e53d15 --- /dev/null +++ b/lib/efi_loader/efi_acpi.c @@ -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); +} diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c index 50d311548e..261d66d97f 100644 --- a/lib/efi_loader/efi_boottime.c +++ b/lib/efi_loader/efi_boottime.c @@ -43,7 +43,7 @@ static bool efi_is_direct_boot = true; * In most cases we want to pass an FDT to the payload, so reserve one slot of * config table space for it. The pointer gets populated by do_bootefi_exec(). */ -static struct efi_configuration_table __efi_runtime_data efi_conf_table[2]; +static struct efi_configuration_table __efi_runtime_data efi_conf_table[16]; #ifdef CONFIG_ARM /* diff --git a/lib/efi_loader/helloworld.c b/lib/efi_loader/helloworld.c index 046b46a2c1..3b8de5b4ea 100644 --- a/lib/efi_loader/helloworld.c +++ b/lib/efi_loader/helloworld.c @@ -14,6 +14,7 @@ static const efi_guid_t loaded_image_guid = LOADED_IMAGE_GUID; static const efi_guid_t fdt_guid = EFI_FDT_GUID; +static const efi_guid_t acpi_guid = EFI_ACPI_TABLE_GUID; static const efi_guid_t smbios_guid = SMBIOS_TABLE_GUID; static int hw_memcmp(const void *buf1, const void *buf2, size_t length) @@ -79,6 +80,9 @@ efi_status_t EFIAPI efi_main(efi_handle_t handle, if (!hw_memcmp(&systable->tables[i].guid, &fdt_guid, sizeof(efi_guid_t))) con_out->output_string(con_out, L"Have device tree\n"); + if (!hw_memcmp(&systable->tables[i].guid, &acpi_guid, + sizeof(efi_guid_t))) + con_out->output_string(con_out, L"Have ACPI 2.0 table\n"); if (!hw_memcmp(&systable->tables[i].guid, &smbios_guid, sizeof(efi_guid_t))) con_out->output_string(con_out, L"Have SMBIOS table\n"); |