199767f8919635c4928607450d9e0abb932109ceToomas Soome * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Copyright (c) 2007 Semihalf, Rafal Jaworowski <raj@semihalf.com>
199767f8919635c4928607450d9e0abb932109ceToomas Soome * All rights reserved.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Redistribution and use in source and binary forms, with or without
199767f8919635c4928607450d9e0abb932109ceToomas Soome * modification, are permitted provided that the following conditions
199767f8919635c4928607450d9e0abb932109ceToomas Soome * 1. Redistributions of source code must retain the above copyright
199767f8919635c4928607450d9e0abb932109ceToomas Soome * notice, this list of conditions and the following disclaimer.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * 2. Redistributions in binary form must reproduce the above copyright
199767f8919635c4928607450d9e0abb932109ceToomas Soome * notice, this list of conditions and the following disclaimer in the
199767f8919635c4928607450d9e0abb932109ceToomas Soome * documentation and/or other materials provided with the distribution.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
199767f8919635c4928607450d9e0abb932109ceToomas Soome * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
199767f8919635c4928607450d9e0abb932109ceToomas Soome * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
199767f8919635c4928607450d9e0abb932109ceToomas Soome * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
199767f8919635c4928607450d9e0abb932109ceToomas Soome * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
199767f8919635c4928607450d9e0abb932109ceToomas Soome * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
199767f8919635c4928607450d9e0abb932109ceToomas Soome * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
199767f8919635c4928607450d9e0abb932109ceToomas Soome * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
199767f8919635c4928607450d9e0abb932109ceToomas Soome * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
199767f8919635c4928607450d9e0abb932109ceToomas Soome * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
199767f8919635c4928607450d9e0abb932109ceToomas Soome * SUCH DAMAGE.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * MD primitives supporting placement of module data
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Avoid low memory, u-boot puts things like args and dtb blobs there.
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define KERN_MINADDR max(KERN_ALIGN, (1024 * 1024))
199767f8919635c4928607450d9e0abb932109ceToomas Soomeextern void _start(void); /* ubldr entry point address. */
199767f8919635c4928607450d9e0abb932109ceToomas Soome * This is called for every object loaded (kernel, module, dtb file, etc). The
199767f8919635c4928607450d9e0abb932109ceToomas Soome * expected return value is the next address at or after the given addr which is
199767f8919635c4928607450d9e0abb932109ceToomas Soome * appropriate for loading the given object described by type and data. On each
199767f8919635c4928607450d9e0abb932109ceToomas Soome * call the addr is the next address following the previously loaded object.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * The first call is for loading the kernel, and the addr argument will be zero,
199767f8919635c4928607450d9e0abb932109ceToomas Soome * and we search for a big block of ram to load the kernel and modules.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * On subsequent calls the addr will be non-zero, and we just round it up so
199767f8919635c4928607450d9e0abb932109ceToomas Soome * that each object begins on a page boundary.
199767f8919635c4928607450d9e0abb932109ceToomas Soomeuboot_loadaddr(u_int type, void *data, uint64_t addr)
199767f8919635c4928607450d9e0abb932109ceToomas Soome * If the loader_kernaddr environment variable is set, blindly
199767f8919635c4928607450d9e0abb932109ceToomas Soome * honor it. It had better be right. We force interpretation
199767f8919635c4928607450d9e0abb932109ceToomas Soome * of the value in base-16 regardless of any leading 0x prefix,
199767f8919635c4928607450d9e0abb932109ceToomas Soome * because that's the U-Boot convention.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Find addr/size of largest DRAM block. Carve our own address
199767f8919635c4928607450d9e0abb932109ceToomas Soome * range out of the block, because loading the kernel over the
199767f8919635c4928607450d9e0abb932109ceToomas Soome * top ourself is a poor memory-conservation strategy. Avoid
199767f8919635c4928607450d9e0abb932109ceToomas Soome * memory at beginning of the first block of physical ram,
199767f8919635c4928607450d9e0abb932109ceToomas Soome * since u-boot likes to pass args and data there. Assume that
199767f8919635c4928607450d9e0abb932109ceToomas Soome * u-boot has moved itself to the very top of ram and
199767f8919635c4928607450d9e0abb932109ceToomas Soome * optimistically assume that we won't run into it up there.
199767f8919635c4928607450d9e0abb932109ceToomas Soome subldr = rounddown2((uintptr_t)_start, KERN_ALIGN);
199767f8919635c4928607450d9e0abb932109ceToomas Soome eubldr = roundup2((uint64_t)uboot_heap_end, KERN_ALIGN);
199767f8919635c4928607450d9e0abb932109ceToomas Soome eblock = rounddown2((uint64_t)si->mr[i].start +
199767f8919635c4928607450d9e0abb932109ceToomas Soome } else if (subldr < sblock && eubldr < eblock) {
199767f8919635c4928607450d9e0abb932109ceToomas Soome /* Loader is below or engulfs the sblock */
199767f8919635c4928607450d9e0abb932109ceToomas Soome this_block = (eubldr < sblock) ? sblock : eubldr;
199767f8919635c4928607450d9e0abb932109ceToomas Soome printf("Loading kernel into region 0x%08jx-0x%08jx (%ju MiB)\n",
199767f8919635c4928607450d9e0abb932109ceToomas Soomeuboot_copyin(const void *src, vm_offset_t dest, const size_t len)
199767f8919635c4928607450d9e0abb932109ceToomas Soomeuboot_copyout(const vm_offset_t src, void *dest, const size_t len)
199767f8919635c4928607450d9e0abb932109ceToomas Soomeuboot_readin(const int fd, vm_offset_t dest, const size_t len)