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,{0x9a,0x29,0x00,0x90,0x27,0x3f,0xc1,0x4d}}
40
41static EFI_GUID fpswa_guid = EFI_INTEL_FPSWA;
42
43/* DIG64 Headless Console & Debug Port Table. */
44#define	HCDP_TABLE_GUID		\
45    {0xf951938d,0x620b,0x42ef,{0x82,0x79,0xa8,0x4b,0x79,0x61,0x78,0x98}}
46
47static EFI_GUID hcdp_guid = HCDP_TABLE_GUID;
48
49static UINTN mapkey;
50
51uint64_t
52ldr_alloc(vm_offset_t va)
53{
54
55	return (0);
56}
57
58int
59ldr_bootinfo(struct bootinfo *bi, uint64_t *bi_addr)
60{
61	VOID *fpswa;
62	EFI_MEMORY_DESCRIPTOR *mm;
63	EFI_PHYSICAL_ADDRESS addr;
64	EFI_HANDLE handle;
65	EFI_STATUS status;
66	size_t bisz;
67	UINTN mmsz, pages, sz;
68	UINT32 mmver;
69
70	bi->bi_systab = (uint64_t)ST;
71	bi->bi_hcdp = (uint64_t)efi_get_table(&hcdp_guid);
72
73	sz = sizeof(EFI_HANDLE);
74	status = BS->LocateHandle(ByProtocol, &fpswa_guid, 0, &sz, &handle);
75	if (status == 0)
76		status = OpenProtocolByHandle(handle, &fpswa_guid, &fpswa);
77	bi->bi_fpswa = (status == 0) ? (uint64_t)fpswa : 0;
78
79	bisz = (sizeof(struct bootinfo) + 0x0f) & ~0x0f;
80
81	/*
82	 * Allocate enough pages to hold the bootinfo block and the memory
83	 * map EFI will return to us. The memory map has an unknown size,
84	 * so we have to determine that first. Note that the AllocatePages
85	 * call can itself modify the memory map, so we have to take that
86	 * into account as well. The changes to the memory map are caused
87	 * by splitting a range of free memory into two (AFAICT), so that
88	 * one is marked as being loader data.
89	 */
90	sz = 0;
91	BS->GetMemoryMap(&sz, NULL, &mapkey, &mmsz, &mmver);
92	sz += mmsz;
93	sz = (sz + 15) & ~15;
94	pages = EFI_SIZE_TO_PAGES(sz + bisz);
95	status = BS->AllocatePages(AllocateAnyPages, EfiLoaderData, pages,
96	    &addr);
97	if (EFI_ERROR(status)) {
98		printf("%s: AllocatePages() returned 0x%lx\n", __func__,
99		    (long)status);
100		return (ENOMEM);
101	}
102
103	/*
104	 * Read the memory map and stash it after bootinfo. Align the
105	 * memory map on a 16-byte boundary (the bootinfo block is page
106	 * aligned).
107	 */
108	*bi_addr = addr;
109	mm = (void *)(addr + bisz);
110	sz = (EFI_PAGE_SIZE * pages) - bisz;
111	status = BS->GetMemoryMap(&sz, mm, &mapkey, &mmsz, &mmver);
112	if (EFI_ERROR(status)) {
113		printf("%s: GetMemoryMap() returned 0x%lx\n", __func__,
114		    (long)status);
115		return (EINVAL);
116	}
117	bi->bi_memmap = (uint64_t)mm;
118	bi->bi_memmap_size = sz;
119	bi->bi_memdesc_size = mmsz;
120	bi->bi_memdesc_version = mmver;
121
122	bcopy(bi, (void *)(*bi_addr), sizeof(*bi));
123	return (0);
124}
125
126int
127ldr_enter(const char *kernel)
128{
129	EFI_STATUS status;
130
131	status = BS->ExitBootServices(IH, mapkey);
132	if (EFI_ERROR(status)) {
133		printf("%s: ExitBootServices() returned 0x%lx\n", __func__,
134		    (long)status);
135		return (EINVAL);
136	}
137
138	return (0);
139}
140