1 /*- 2 * Copyright (c) 2004, 2006 Marcel Moolenaar 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <stand.h> 31 32 #include <efi.h> 33 #include <efilib.h> 34 35 #include <libi386.h> 36 #include <machine/bootinfo.h> 37 38 #define EFI_INTEL_FPSWA \ 39 {0xc41b6531, 0x97b9, 0x11d3, \ 40 {0x9a, 0x29, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d}} 41 42 static EFI_GUID fpswa_guid = EFI_INTEL_FPSWA; 43 44 /* DIG64 Headless Console & Debug Port Table. */ 45 #define HCDP_TABLE_GUID \ 46 {0xf951938d, 0x620b, 0x42ef, \ 47 {0x82, 0x79, 0xa8, 0x4b, 0x79, 0x61, 0x78, 0x98}} 48 49 static EFI_GUID hcdp_guid = HCDP_TABLE_GUID; 50 51 static UINTN mapkey; 52 53 uint64_t 54 ldr_alloc(vm_offset_t va) 55 { 56 57 return (0); 58 } 59 60 int 61 ldr_bootinfo(struct bootinfo *bi, uint64_t *bi_addr) 62 { 63 void *fpswa; 64 EFI_MEMORY_DESCRIPTOR *mm; 65 EFI_PHYSICAL_ADDRESS addr; 66 EFI_HANDLE *handles; 67 EFI_STATUS status; 68 size_t bisz; 69 UINTN mmsz, pages, sz; 70 UINT32 mmver; 71 uint_t nhandles; 72 73 bi->bi_systab = (uint64_t)ST; 74 bi->bi_hcdp = (uint64_t)efi_get_table(&hcdp_guid); 75 76 status = efi_get_protocol_handles(&fpswa_guid, &nhandles, &handles); 77 if (status == 0) 78 status = OpenProtocolByHandle(*handles, &fpswa_guid, &fpswa); 79 bi->bi_fpswa = (status == 0) ? (uint64_t)fpswa : 0; 80 81 bisz = (sizeof (struct bootinfo) + 0x0f) & ~0x0f; 82 83 /* 84 * Allocate enough pages to hold the bootinfo block and the memory 85 * map EFI will return to us. The memory map has an unknown size, 86 * so we have to determine that first. Note that the AllocatePages 87 * call can itself modify the memory map, so we have to take that 88 * into account as well. The changes to the memory map are caused 89 * by splitting a range of free memory into two (AFAICT), so that 90 * one is marked as being loader data. 91 */ 92 sz = 0; 93 BS->GetMemoryMap(&sz, NULL, &mapkey, &mmsz, &mmver); 94 sz += mmsz; 95 sz = (sz + 15) & ~15; 96 pages = EFI_SIZE_TO_PAGES(sz + bisz); 97 status = BS->AllocatePages(AllocateAnyPages, EfiLoaderData, pages, 98 &addr); 99 if (EFI_ERROR(status)) { 100 printf("%s: AllocatePages() returned 0x%lx\n", __func__, 101 (long)status); 102 return (ENOMEM); 103 } 104 105 /* 106 * Read the memory map and stash it after bootinfo. Align the 107 * memory map on a 16-byte boundary (the bootinfo block is page 108 * aligned). 109 */ 110 *bi_addr = addr; 111 mm = (void *)(addr + bisz); 112 sz = (EFI_PAGE_SIZE * pages) - bisz; 113 status = BS->GetMemoryMap(&sz, mm, &mapkey, &mmsz, &mmver); 114 if (EFI_ERROR(status)) { 115 printf("%s: GetMemoryMap() returned 0x%lx\n", __func__, 116 (long)status); 117 return (EINVAL); 118 } 119 bi->bi_memmap = (uint64_t)mm; 120 bi->bi_memmap_size = sz; 121 bi->bi_memdesc_size = mmsz; 122 bi->bi_memdesc_version = mmver; 123 124 bcopy(bi, (void *)(*bi_addr), sizeof (*bi)); 125 return (0); 126 } 127 128 int 129 ldr_enter(const char *kernel) 130 { 131 EFI_STATUS status; 132 133 status = BS->ExitBootServices(IH, mapkey); 134 if (EFI_ERROR(status)) { 135 printf("%s: ExitBootServices() returned 0x%lx\n", __func__, 136 (long)status); 137 return (EINVAL); 138 } 139 140 return (0); 141 } 142