2 * Copyright (c) 2013 The FreeBSD Foundation
5 * This software was developed by Benno Rice under sponsorship from
6 * the FreeBSD Foundation.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
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
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
32 #include <sys/param.h>
35 #include <bootstrap.h>
40 #ifndef EFI_STAGING_SIZE
41 #define EFI_STAGING_SIZE 32
44 #define STAGE_PAGES ((EFI_STAGING_SIZE) * 1024 * 1024 / 4096)
46 EFI_PHYSICAL_ADDRESS staging, staging_end;
47 int stage_offset_set = 0;
51 x86_efi_copy_init(void)
55 status = BS->AllocatePages(AllocateAnyPages, EfiLoaderData,
56 STAGE_PAGES, &staging);
57 if (EFI_ERROR(status)) {
58 printf("failed to allocate staging area: %lu\n",
59 (unsigned long)(status & EFI_ERROR_MASK));
62 staging_end = staging + STAGE_PAGES * 4096;
68 x86_efi_copyin(const void *src, vm_offset_t dest, const size_t len)
71 if (!stage_offset_set) {
72 stage_offset = (vm_offset_t)staging - dest;
76 /* XXX: Callers do not check for failure. */
77 if (dest + stage_offset + len > staging_end) {
81 bcopy(src, (void *)(dest + stage_offset), len);
86 x86_efi_copyout(const vm_offset_t src, void *dest, const size_t len)
89 /* XXX: Callers do not check for failure. */
90 if (src + stage_offset + len > staging_end) {
94 bcopy((void *)(src + stage_offset), dest, len);
100 x86_efi_readin(const int fd, vm_offset_t dest, const size_t len)
103 if (dest + stage_offset + len > staging_end) {
107 return (read(fd, (void *)(dest + stage_offset), len));
111 x86_efi_copy_finish(void)
113 uint64_t *src, *dst, *last;
115 src = (uint64_t *)staging;
116 dst = (uint64_t *)(staging - stage_offset);
117 last = (uint64_t *)(staging + STAGE_PAGES * EFI_PAGE_SIZE);