1*42c8ea3dSArd Biesheuvel // SPDX-License-Identifier: GPL-2.0-only 2*42c8ea3dSArd Biesheuvel 3*42c8ea3dSArd Biesheuvel #include <linux/efi.h> 4*42c8ea3dSArd Biesheuvel #include <asm/efi.h> 5*42c8ea3dSArd Biesheuvel 6*42c8ea3dSArd Biesheuvel #include "efistub.h" 7*42c8ea3dSArd Biesheuvel 8*42c8ea3dSArd Biesheuvel /* 9*42c8ea3dSArd Biesheuvel * EFI entry point for the generic EFI stub used by ARM, arm64, RISC-V and 10*42c8ea3dSArd Biesheuvel * LoongArch. This is the entrypoint that is described in the PE/COFF header 11*42c8ea3dSArd Biesheuvel * of the core kernel. 12*42c8ea3dSArd Biesheuvel */ 13*42c8ea3dSArd Biesheuvel efi_status_t __efiapi efi_pe_entry(efi_handle_t handle, 14*42c8ea3dSArd Biesheuvel efi_system_table_t *systab) 15*42c8ea3dSArd Biesheuvel { 16*42c8ea3dSArd Biesheuvel efi_loaded_image_t *image; 17*42c8ea3dSArd Biesheuvel efi_status_t status; 18*42c8ea3dSArd Biesheuvel unsigned long image_addr; 19*42c8ea3dSArd Biesheuvel unsigned long image_size = 0; 20*42c8ea3dSArd Biesheuvel /* addr/point and size pairs for memory management*/ 21*42c8ea3dSArd Biesheuvel char *cmdline_ptr = NULL; 22*42c8ea3dSArd Biesheuvel efi_guid_t loaded_image_proto = LOADED_IMAGE_PROTOCOL_GUID; 23*42c8ea3dSArd Biesheuvel unsigned long reserve_addr = 0; 24*42c8ea3dSArd Biesheuvel unsigned long reserve_size = 0; 25*42c8ea3dSArd Biesheuvel 26*42c8ea3dSArd Biesheuvel WRITE_ONCE(efi_system_table, systab); 27*42c8ea3dSArd Biesheuvel 28*42c8ea3dSArd Biesheuvel /* Check if we were booted by the EFI firmware */ 29*42c8ea3dSArd Biesheuvel if (efi_system_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE) 30*42c8ea3dSArd Biesheuvel return EFI_INVALID_PARAMETER; 31*42c8ea3dSArd Biesheuvel 32*42c8ea3dSArd Biesheuvel /* 33*42c8ea3dSArd Biesheuvel * Get a handle to the loaded image protocol. This is used to get 34*42c8ea3dSArd Biesheuvel * information about the running image, such as size and the command 35*42c8ea3dSArd Biesheuvel * line. 36*42c8ea3dSArd Biesheuvel */ 37*42c8ea3dSArd Biesheuvel status = efi_bs_call(handle_protocol, handle, &loaded_image_proto, 38*42c8ea3dSArd Biesheuvel (void *)&image); 39*42c8ea3dSArd Biesheuvel if (status != EFI_SUCCESS) { 40*42c8ea3dSArd Biesheuvel efi_err("Failed to get loaded image protocol\n"); 41*42c8ea3dSArd Biesheuvel return status; 42*42c8ea3dSArd Biesheuvel } 43*42c8ea3dSArd Biesheuvel 44*42c8ea3dSArd Biesheuvel status = efi_handle_cmdline(image, &cmdline_ptr); 45*42c8ea3dSArd Biesheuvel if (status != EFI_SUCCESS) 46*42c8ea3dSArd Biesheuvel return status; 47*42c8ea3dSArd Biesheuvel 48*42c8ea3dSArd Biesheuvel efi_info("Booting Linux Kernel...\n"); 49*42c8ea3dSArd Biesheuvel 50*42c8ea3dSArd Biesheuvel status = handle_kernel_image(&image_addr, &image_size, 51*42c8ea3dSArd Biesheuvel &reserve_addr, 52*42c8ea3dSArd Biesheuvel &reserve_size, 53*42c8ea3dSArd Biesheuvel image, handle); 54*42c8ea3dSArd Biesheuvel if (status != EFI_SUCCESS) { 55*42c8ea3dSArd Biesheuvel efi_err("Failed to relocate kernel\n"); 56*42c8ea3dSArd Biesheuvel return status; 57*42c8ea3dSArd Biesheuvel } 58*42c8ea3dSArd Biesheuvel 59*42c8ea3dSArd Biesheuvel status = efi_stub_common(handle, image, image_addr, cmdline_ptr); 60*42c8ea3dSArd Biesheuvel 61*42c8ea3dSArd Biesheuvel efi_free(image_size, image_addr); 62*42c8ea3dSArd Biesheuvel efi_free(reserve_size, reserve_addr); 63*42c8ea3dSArd Biesheuvel 64*42c8ea3dSArd Biesheuvel return status; 65*42c8ea3dSArd Biesheuvel } 66