1 /*- 2 * Copyright (c) 2001 Benno Rice <benno@FreeBSD.org> 3 * Copyright (c) 2007 Semihalf, Rafal Jaworowski <raj@semihalf.com> 4 * All rights reserved. 5 * Copyright (c) 2024 The FreeBSD Foundation 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/param.h> 30 #include <sys/linker.h> 31 32 #include <machine/md_var.h> 33 #include <machine/metadata.h> 34 #include <machine/elf.h> 35 36 #include <stand.h> 37 38 #include <efi.h> 39 #include <efilib.h> 40 41 #include "bootstrap.h" 42 #include "loader_efi.h" 43 44 #include <Uefi.h> 45 #include <Protocol/RiscVBootProtocol.h> 46 47 static void 48 riscv_set_boot_hart(struct preloaded_file *fp) 49 { 50 // No #define in EDK2 for this 51 EFI_GUID riscvboot = { 0xccd15fec, 0x6f73, 0x4eec, { 0x83, 0x95, 0x3e, 0x69, 0xe4, 0xb9, 0x40, 0xbf }}; 52 RISCV_EFI_BOOT_PROTOCOL *proto; 53 EFI_STATUS status = 0; 54 uint64_t boot_hartid = ULONG_MAX; 55 56 status = BS->LocateProtocol(&riscvboot, NULL, (void **)&proto); 57 if (EFI_ERROR(status)) { 58 return; 59 } 60 61 status = proto->GetBootHartId(proto, &boot_hartid); 62 if (EFI_ERROR(status)) { 63 return; 64 } 65 66 file_addmetadata(fp, MODINFOMD_BOOT_HARTID, sizeof(boot_hartid), 67 &boot_hartid); 68 } 69 70 static int 71 __elfN(exec)(struct preloaded_file *fp) 72 { 73 struct file_metadata *fmp; 74 vm_offset_t modulep, kernend; 75 Elf_Ehdr *e; 76 int error; 77 void (*entry)(void *); 78 79 if ((fmp = file_findmetadata(fp, MODINFOMD_ELFHDR)) == NULL) 80 return (EFTYPE); 81 82 riscv_set_boot_hart(fp); 83 84 e = (Elf_Ehdr *)&fmp->md_data; 85 86 efi_time_fini(); 87 88 entry = efi_translate(e->e_entry); 89 90 printf("Kernel entry at %p...\n", entry); 91 printf("Kernel args: %s\n", fp->f_args); 92 93 /* 94 * we have to cleanup here because net_cleanup() doesn't work after 95 * we call ExitBootServices 96 */ 97 dev_cleanup(); 98 99 if ((error = bi_load(fp->f_args, &modulep, &kernend, true)) != 0) { 100 efi_time_init(); 101 return (error); 102 } 103 104 (*entry)((void *)modulep); 105 panic("exec returned"); 106 } 107 108 static struct file_format riscv_elf = { 109 __elfN(loadfile), 110 __elfN(exec) 111 }; 112 113 struct file_format *file_formats[] = { 114 &riscv_elf, 115 NULL 116 }; 117