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// SPDX-License-Identifier: GPL-2.0-only
#include <linux/efi.h>
#include <asm/efi.h>
#include "efistub.h"
static unsigned long screen_info_offset;
struct screen_info *alloc_screen_info(void)
{
if (IS_ENABLED(CONFIG_ARM))
return __alloc_screen_info();
return (void *)&screen_info + screen_info_offset;
}
/*
* EFI entry point for the generic EFI stub used by ARM, arm64, RISC-V and
* LoongArch. This is the entrypoint that is described in the PE/COFF header
* of the core kernel.
*/
efi_status_t __efiapi efi_pe_entry(efi_handle_t handle,
efi_system_table_t *systab)
{
efi_loaded_image_t *image;
efi_status_t status;
unsigned long image_addr;
unsigned long image_size = 0;
/* addr/point and size pairs for memory management*/
char *cmdline_ptr = NULL;
efi_guid_t loaded_image_proto = LOADED_IMAGE_PROTOCOL_GUID;
unsigned long reserve_addr = 0;
unsigned long reserve_size = 0;
WRITE_ONCE(efi_system_table, systab);
/* Check if we were booted by the EFI firmware */
if (efi_system_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
return EFI_INVALID_PARAMETER;
/*
* Get a handle to the loaded image protocol. This is used to get
* information about the running image, such as size and the command
* line.
*/
status = efi_bs_call(handle_protocol, handle, &loaded_image_proto,
(void *)&image);
if (status != EFI_SUCCESS) {
efi_err("Failed to get loaded image protocol\n");
return status;
}
status = efi_handle_cmdline(image, &cmdline_ptr);
if (status != EFI_SUCCESS)
return status;
efi_info("Booting Linux Kernel...\n");
status = handle_kernel_image(&image_addr, &image_size,
&reserve_addr,
&reserve_size,
image, handle);
if (status != EFI_SUCCESS) {
efi_err("Failed to relocate kernel\n");
return status;
}
screen_info_offset = image_addr - (unsigned long)image->image_base;
status = efi_stub_common(handle, image, image_addr, cmdline_ptr);
efi_free(image_size, image_addr);
efi_free(reserve_size, reserve_addr);
return status;
}
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