u-boot/lib/efi_loader/helloworld.c
Heinrich Schuchardt dec88e41e0 efi_loader: consistent naming of protocol GUIDs
We should consistently use the same name for protocol GUIDs as defined in
the UEFI specification. Not adhering to this rule has led to duplicate
definitions for the EFI_LOADED_IMAGE_PROTOCOL_GUID.

Adjust misnamed protocol GUIDs.

Adjust the text for the graphics output protocol in the output of the
`efidebug dh` command.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2019-04-23 00:37:27 +02:00

94 lines
2.7 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* EFI hello world
*
* Copyright (c) 2016 Google, Inc
* Written by Simon Glass <sjg@chromium.org>
*
* This program demonstrates calling a boottime service.
* It writes a greeting and the load options to the console.
*/
#include <common.h>
#include <efi_api.h>
static const efi_guid_t loaded_image_guid = EFI_LOADED_IMAGE_PROTOCOL_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;
/**
* efi_main() - entry point of the EFI application.
*
* @handle: handle of the loaded image
* @systable: system table
* @return: status code
*/
efi_status_t EFIAPI efi_main(efi_handle_t handle,
struct efi_system_table *systable)
{
struct efi_simple_text_output_protocol *con_out = systable->con_out;
struct efi_boot_services *boottime = systable->boottime;
struct efi_loaded_image *loaded_image;
efi_status_t ret;
efi_uintn_t i;
u16 rev[] = L"0.0.0";
/* UEFI requires CR LF */
con_out->output_string(con_out, L"Hello, world!\r\n");
/* Print the revision number */
rev[0] = (systable->hdr.revision >> 16) + '0';
rev[4] = systable->hdr.revision & 0xffff;
for (; rev[4] >= 10;) {
rev[4] -= 10;
++rev[2];
}
/* Third digit is only to be shown if non-zero */
if (rev[4])
rev[4] += '0';
else
rev[3] = 0;
con_out->output_string(con_out, L"Running on UEFI ");
con_out->output_string(con_out, rev);
con_out->output_string(con_out, L"\r\n");
/* Get the loaded image protocol */
ret = boottime->handle_protocol(handle, &loaded_image_guid,
(void **)&loaded_image);
if (ret != EFI_SUCCESS) {
con_out->output_string
(con_out, L"Cannot open loaded image protocol\r\n");
goto out;
}
/* Find configuration tables */
for (i = 0; i < systable->nr_tables; ++i) {
if (!memcmp(&systable->tables[i].guid, &fdt_guid,
sizeof(efi_guid_t)))
con_out->output_string
(con_out, L"Have device tree\r\n");
if (!memcmp(&systable->tables[i].guid, &acpi_guid,
sizeof(efi_guid_t)))
con_out->output_string
(con_out, L"Have ACPI 2.0 table\r\n");
if (!memcmp(&systable->tables[i].guid, &smbios_guid,
sizeof(efi_guid_t)))
con_out->output_string
(con_out, L"Have SMBIOS table\r\n");
}
/* Output the load options */
con_out->output_string(con_out, L"Load options: ");
if (loaded_image->load_options_size && loaded_image->load_options)
con_out->output_string(con_out,
(u16 *)loaded_image->load_options);
else
con_out->output_string(con_out, L"<none>");
con_out->output_string(con_out, L"\r\n");
out:
boottime->exit(handle, ret, 0, NULL);
/* We should never arrive here */
return ret;
}