xref: /illumos-gate/usr/src/boot/efi/loader/arch/i386/efimd.c (revision 0101d5c76fd6df416f91194bf9f36f9225bf8c52)
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
ldr_alloc(vm_offset_t va)54 ldr_alloc(vm_offset_t va)
55 {
56 
57 	return (0);
58 }
59 
60 int
ldr_bootinfo(struct bootinfo * bi,uint64_t * bi_addr)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
ldr_enter(const char * kernel)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