Index: head/sys/boot/efi/loader/copy.c
===================================================================
--- head/sys/boot/efi/loader/copy.c (revision 314546)
+++ head/sys/boot/efi/loader/copy.c (revision 314547)
@@ -1,141 +1,218 @@
/*-
* 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"
+#if defined(__i386__) || defined(__amd64__)
+
+#define KERNEL_PHYSICAL_BASE (2*1024*1024)
+
+static void
+efi_verify_staging_size(unsigned long *nr_pages)
+{
+ UINTN sz;
+ EFI_MEMORY_DESCRIPTOR *map, *p;
+ EFI_PHYSICAL_ADDRESS start, end;
+ UINTN key, dsz;
+ UINT32 dver;
+ EFI_STATUS status;
+ int i, ndesc;
+ unsigned long available_pages;
+
+ sz = 0;
+ status = BS->GetMemoryMap(&sz, 0, &key, &dsz, &dver);
+ if (status != EFI_BUFFER_TOO_SMALL) {
+ printf("Can't determine memory map size\n");
+ return;
+ }
+
+ map = malloc(sz);
+ status = BS->GetMemoryMap(&sz, map, &key, &dsz, &dver);
+ if (EFI_ERROR(status)) {
+ printf("Can't read memory map\n");
+ goto out;
+ }
+
+ ndesc = sz / dsz;
+
+ for (i = 0, p = map; i < ndesc;
+ i++, p = NextMemoryDescriptor(p, dsz)) {
+ start = p->PhysicalStart;
+ end = start + p->NumberOfPages * EFI_PAGE_SIZE;
+
+ if (KERNEL_PHYSICAL_BASE < start ||
+ KERNEL_PHYSICAL_BASE >= end)
+ continue;
+
+ if (p->Type != EfiConventionalMemory)
+ continue;
+
+ available_pages = p->NumberOfPages -
+ ((KERNEL_PHYSICAL_BASE - start) >> EFI_PAGE_SHIFT);
+
+ if (*nr_pages > available_pages) {
+ printf("staging area size is reduced: %ld -> %ld!\n",
+ *nr_pages, available_pages);
+ *nr_pages = available_pages;
+ }
+
+ break;
+ }
+
+out:
+ free(map);
+}
+#endif
+
#ifndef EFI_STAGING_SIZE
#define EFI_STAGING_SIZE 64
#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;
+ unsigned long nr_pages;
+
+ nr_pages = EFI_SIZE_TO_PAGES((EFI_STAGING_SIZE) * 1024 * 1024);
+
+#if defined(__i386__) || defined(__amd64__)
+ /* We'll decrease nr_pages, if it's too big. */
+ efi_verify_staging_size(&nr_pages);
+
+ /*
+ * The staging area must reside in the the first 1GB physical
+ * memory: see elf64_exec() in
+ * boot/efi/loader/arch/amd64/elf64_freebsd.c.
+ */
+ staging = 1024*1024*1024;
+ status = BS->AllocatePages(AllocateMaxAddress, EfiLoaderData,
+ nr_pages, &staging);
+#else
status = BS->AllocatePages(AllocateAnyPages, EfiLoaderData,
- STAGE_PAGES, &staging);
+ nr_pages, &staging);
+#endif
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;
+ staging_end = staging + nr_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++;
}