mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-08 12:16:16 +09:00
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>
139 lines
3.1 KiB
C
139 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2015 Google, Inc
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*
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* EFI information obtained here:
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* http://wiki.phoenix.com/wiki/index.php/EFI_BOOT_SERVICES
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*
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* This file implements U-Boot running as an EFI application.
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*/
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#include <common.h>
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#include <debug_uart.h>
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#include <errno.h>
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#include <linux/err.h>
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#include <linux/types.h>
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#include <efi.h>
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#include <efi_api.h>
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DECLARE_GLOBAL_DATA_PTR;
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static struct efi_priv *global_priv;
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struct efi_system_table *efi_get_sys_table(void)
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{
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return global_priv->sys_table;
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}
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unsigned long efi_get_ram_base(void)
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{
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return global_priv->ram_base;
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}
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static efi_status_t setup_memory(struct efi_priv *priv)
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{
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struct efi_boot_services *boot = priv->boot;
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efi_physical_addr_t addr;
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efi_status_t ret;
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int pages;
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/*
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* Use global_data_ptr instead of gd since it is an assignment. There
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* are very few assignments to global_data in U-Boot and this makes
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* it easier to find them.
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*/
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global_data_ptr = efi_malloc(priv, sizeof(struct global_data), &ret);
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if (!global_data_ptr)
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return ret;
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memset(gd, '\0', sizeof(*gd));
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gd->malloc_base = (ulong)efi_malloc(priv, CONFIG_VAL(SYS_MALLOC_F_LEN),
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&ret);
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if (!gd->malloc_base)
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return ret;
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pages = CONFIG_EFI_RAM_SIZE >> 12;
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/*
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* Don't allocate any memory above 4GB. U-Boot is a 32-bit application
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* so we want it to load below 4GB.
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*/
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addr = 1ULL << 32;
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ret = boot->allocate_pages(EFI_ALLOCATE_MAX_ADDRESS,
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priv->image_data_type, pages, &addr);
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if (ret) {
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printf("(using pool %lx) ", ret);
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priv->ram_base = (ulong)efi_malloc(priv, CONFIG_EFI_RAM_SIZE,
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&ret);
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if (!priv->ram_base)
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return ret;
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priv->use_pool_for_malloc = true;
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} else {
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priv->ram_base = addr;
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}
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gd->ram_size = pages << 12;
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return 0;
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}
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static void free_memory(struct efi_priv *priv)
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{
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struct efi_boot_services *boot = priv->boot;
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if (priv->use_pool_for_malloc)
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efi_free(priv, (void *)priv->ram_base);
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else
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boot->free_pages(priv->ram_base, gd->ram_size >> 12);
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efi_free(priv, (void *)gd->malloc_base);
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efi_free(priv, gd);
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global_data_ptr = NULL;
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}
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/**
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* efi_main() - Start an EFI image
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*
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* This function is called by our EFI start-up code. It handles running
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* U-Boot. If it returns, EFI will continue. Another way to get back to EFI
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* is via reset_cpu().
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*/
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efi_status_t efi_main(efi_handle_t image, struct efi_system_table *sys_table)
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{
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struct efi_priv local_priv, *priv = &local_priv;
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efi_status_t ret;
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/* Set up access to EFI data structures */
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efi_init(priv, "App", image, sys_table);
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global_priv = priv;
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/*
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* Set up the EFI debug UART so that printf() works. This is
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* implemented in the EFI serial driver, serial_efi.c. The application
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* can use printf() freely.
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*/
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debug_uart_init();
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ret = setup_memory(priv);
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if (ret) {
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printf("Failed to set up memory: ret=%lx\n", ret);
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return ret;
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}
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printf("starting\n");
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board_init_f(GD_FLG_SKIP_RELOC);
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board_init_r(NULL, 0);
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free_memory(priv);
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return EFI_SUCCESS;
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}
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void reset_cpu(ulong addr)
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{
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struct efi_priv *priv = global_priv;
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free_memory(priv);
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printf("U-Boot EFI exiting\n");
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priv->boot->exit(priv->parent_image, EFI_SUCCESS, 0, NULL);
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}
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