5f5ec09bfb
The generic ELF loading code maps the kernel into low memory by subtracting KERN_BASE. So the copyin/copyout/readin functions are always called with low addresses. This code finds the largest DRAM block from the U-Boot memory map and adds that base to the addresses. In particular, this fixes ubldr on AM3358, which has DRAM mapped to 0x80000000 at power-on.
93 lines
2.7 KiB
C
93 lines
2.7 KiB
C
/*-
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* Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
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* Copyright (c) 2007 Semihalf, Rafal Jaworowski <raj@semihalf.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <stand.h>
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#include <stdint.h>
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#include "api_public.h"
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#include "glue.h"
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/*
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* MD primitives supporting placement of module data
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*/
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void *
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uboot_vm_translate(vm_offset_t o) {
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struct sys_info *si;
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static uintptr_t start = 0;
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static size_t size = 0;
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int i;
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if (size == 0) {
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if ((si = ub_get_sys_info()) == NULL)
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panic("could not retrieve system info");
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/* Find start/size of largest DRAM block. */
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for (i = 0; i < si->mr_no; i++) {
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if (si->mr[i].flags == MR_ATTR_DRAM
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&& si->mr[i].size > size) {
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start = si->mr[i].start;
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size = si->mr[i].size;
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}
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}
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if (size <= 0)
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panic("No suitable DRAM?\n");
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/*
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printf("Loading into memory region 0x%08X-0x%08X (%d MiB)\n",
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start, start + size, size / 1024 / 1024);
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*/
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}
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if (o > size)
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panic("Address 0x%08jX bigger than size 0x%08X\n",
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(intmax_t)o, size);
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return (void *)(start + o);
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}
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ssize_t
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uboot_copyin(const void *src, vm_offset_t dest, const size_t len)
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{
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bcopy(src, uboot_vm_translate(dest), len);
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return (len);
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}
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ssize_t
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uboot_copyout(const vm_offset_t src, void *dest, const size_t len)
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{
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bcopy(uboot_vm_translate(src), dest, len);
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return (len);
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}
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ssize_t
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uboot_readin(const int fd, vm_offset_t dest, const size_t len)
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{
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return (read(fd, uboot_vm_translate(dest), len));
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}
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