mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-06 19:33:07 +00:00
83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
100 lines
2.6 KiB
C
100 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* EFI hello world
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*
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* Copyright (c) 2016 Google, Inc
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* Written by Simon Glass <sjg@chromium.org>
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*
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* This program demonstrates calling a boottime service.
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* It writes a greeting and the load options to the console.
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*/
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#include <common.h>
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#include <efi_api.h>
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static const efi_guid_t loaded_image_guid = LOADED_IMAGE_GUID;
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static const efi_guid_t fdt_guid = EFI_FDT_GUID;
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static const efi_guid_t smbios_guid = SMBIOS_TABLE_GUID;
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static int hw_memcmp(const void *buf1, const void *buf2, size_t length)
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{
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const u8 *pos1 = buf1;
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const u8 *pos2 = buf2;
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for (; length; --length) {
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if (*pos1 != *pos2)
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return *pos1 - *pos2;
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++pos1;
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++pos2;
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}
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return 0;
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}
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/*
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* Entry point of the EFI application.
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*
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* @handle handle of the loaded image
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* @systable system table
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* @return status code
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*/
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efi_status_t EFIAPI efi_main(efi_handle_t handle,
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struct efi_system_table *systable)
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{
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struct efi_simple_text_output_protocol *con_out = systable->con_out;
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struct efi_boot_services *boottime = systable->boottime;
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struct efi_loaded_image *loaded_image;
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efi_status_t ret;
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efi_uintn_t i;
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u16 rev[] = L"0.0.0";
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con_out->output_string(con_out, L"Hello, world!\n");
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/* Print the revision number */
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rev[0] = (systable->hdr.revision >> 16) + '0';
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rev[4] = systable->hdr.revision & 0xffff;
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for (; rev[4] >= 10;) {
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rev[4] -= 10;
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++rev[2];
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}
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/* Third digit is only to be shown if non-zero */
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if (rev[4])
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rev[4] += '0';
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else
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rev[3] = 0;
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con_out->output_string(con_out, L"Running on UEFI ");
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con_out->output_string(con_out, rev);
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con_out->output_string(con_out, L"\n");
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/* Get the loaded image protocol */
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ret = boottime->handle_protocol(handle, &loaded_image_guid,
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(void **)&loaded_image);
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if (ret != EFI_SUCCESS) {
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con_out->output_string(con_out,
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L"Cannot open loaded image protocol\n");
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goto out;
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}
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/* Find configuration tables */
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for (i = 0; i < systable->nr_tables; ++i) {
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if (!hw_memcmp(&systable->tables[i].guid, &fdt_guid,
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sizeof(efi_guid_t)))
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con_out->output_string(con_out, L"Have device tree\n");
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if (!hw_memcmp(&systable->tables[i].guid, &smbios_guid,
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sizeof(efi_guid_t)))
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con_out->output_string(con_out, L"Have SMBIOS table\n");
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}
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/* Output the load options */
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con_out->output_string(con_out, L"Load options: ");
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if (loaded_image->load_options_size && loaded_image->load_options)
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con_out->output_string(con_out,
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(u16 *)loaded_image->load_options);
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else
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con_out->output_string(con_out, L"<none>");
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con_out->output_string(con_out, L"\n");
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out:
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boottime->exit(handle, ret, 0, NULL);
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/* We should never arrive here */
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return ret;
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}
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