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/*-
* Copyright (c) 2013 The FreeBSD Foundation
* All rights reserved.
*
* This software was developed by Benno Rice under sponsorship from
* the FreeBSD Foundation.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <stand.h>
#include <bootstrap.h>
#include <efi.h>
#include <efilib.h>
#include "loader_efi.h"
#ifndef EFI_STAGING_SIZE
#define EFI_STAGING_SIZE 48
#endif
#define STAGE_PAGES EFI_SIZE_TO_PAGES((EFI_STAGING_SIZE) * 1024 * 1024)
EFI_PHYSICAL_ADDRESS staging, staging_end;
int stage_offset_set = 0;
ssize_t stage_offset;
int
efi_copy_init(void)
{
EFI_STATUS status;
status = BS->AllocatePages(AllocateAnyPages, EfiLoaderData,
STAGE_PAGES, &staging);
if (EFI_ERROR(status)) {
printf("failed to allocate staging area: %lu\n",
EFI_ERROR_CODE(status));
return (status);
}
staging_end = staging + STAGE_PAGES * EFI_PAGE_SIZE;
#if defined(__aarch64__) || defined(__arm__)
/*
* Round the kernel load address to a 2MiB value. This is needed
* because the kernel builds a page table based on where it has
* been loaded in physical address space. As the kernel will use
* either a 1MiB or 2MiB page for this we need to make sure it
* is correctly aligned for both cases.
*/
staging = roundup2(staging, 2 * 1024 * 1024);
#endif
return (0);
}
void *
efi_translate(vm_offset_t ptr)
{
return ((void *)(ptr + stage_offset));
}
ssize_t
efi_copyin(const void *src, vm_offset_t dest, const size_t len)
{
if (!stage_offset_set) {
stage_offset = (vm_offset_t)staging - dest;
stage_offset_set = 1;
}
/* XXX: Callers do not check for failure. */
if (dest + stage_offset + len > staging_end) {
errno = ENOMEM;
return (-1);
}
bcopy(src, (void *)(dest + stage_offset), len);
return (len);
}
ssize_t
efi_copyout(const vm_offset_t src, void *dest, const size_t len)
{
/* XXX: Callers do not check for failure. */
if (src + stage_offset + len > staging_end) {
errno = ENOMEM;
return (-1);
}
bcopy((void *)(src + stage_offset), dest, len);
return (len);
}
ssize_t
efi_readin(const int fd, vm_offset_t dest, const size_t len)
{
if (dest + stage_offset + len > staging_end) {
errno = ENOMEM;
return (-1);
}
return (read(fd, (void *)(dest + stage_offset), len));
}
void
efi_copy_finish(void)
{
uint64_t *src, *dst, *last;
src = (uint64_t *)staging;
dst = (uint64_t *)(staging - stage_offset);
last = (uint64_t *)staging_end;
while (src < last)
*dst++ = *src++;
}
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