freebsd-nq/sys/boot/ofw/common/main.c
Nathan Whitehorn 4b2b0f5043 Provide a shim layer in loader to condense the Open Firmware device tree to
an FDT. This is how Linux and OS X boot and can avoid some issues with
using Open Firmware at runtime. The code is highly experimental and disabled
by default; it can be turned on by setting the loader environment variable
"usefdt" to a non-NULL value.
2015-03-09 02:57:34 +00:00

191 lines
4.7 KiB
C

/*-
* Copyright (c) 2000 Benno Rice <benno@jeamland.net>
* Copyright (c) 2000 Stephane Potvin <sepotvin@videotron.ca>
* All rights reserved.
*
* 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 AUTHORS 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 <stand.h>
#include "openfirm.h"
#include "libofw.h"
#include "bootstrap.h"
struct arch_switch archsw; /* MI/MD interface boundary */
extern char end[];
extern char bootprog_name[];
extern char bootprog_rev[];
extern char bootprog_date[];
extern char bootprog_maker[];
u_int32_t acells, scells;
static char bootargs[128];
#define HEAP_SIZE 0x100000
#define OF_puts(fd, text) OF_write(fd, text, strlen(text))
void
init_heap(void)
{
void *base;
ihandle_t stdout;
if ((base = ofw_alloc_heap(HEAP_SIZE)) == (void *)0xffffffff) {
OF_getprop(chosen, "stdout", &stdout, sizeof(stdout));
OF_puts(stdout, "Heap memory claim failed!\n");
OF_enter();
}
setheap(base, (void *)((int)base + HEAP_SIZE));
}
uint64_t
memsize(void)
{
phandle_t memoryp;
cell_t reg[24];
int i, sz;
u_int64_t memsz;
memsz = 0;
memoryp = OF_instance_to_package(memory);
sz = OF_getprop(memoryp, "reg", &reg, sizeof(reg));
sz /= sizeof(reg[0]);
for (i = 0; i < sz; i += (acells + scells)) {
if (scells > 1)
memsz += (uint64_t)reg[i + acells] << 32;
memsz += reg[i + acells + scells - 1];
}
return (memsz);
}
int
main(int (*openfirm)(void *))
{
phandle_t root;
int i;
char bootpath[64];
char *ch;
int bargc;
char **bargv;
/*
* Initalise the Open Firmware routines by giving them the entry point.
*/
OF_init(openfirm);
root = OF_finddevice("/");
scells = acells = 1;
OF_getprop(root, "#address-cells", &acells, sizeof(acells));
OF_getprop(root, "#size-cells", &scells, sizeof(scells));
/*
* Initialise the heap as early as possible. Once this is done,
* alloc() is usable. The stack is buried inside us, so this is
* safe.
*/
init_heap();
/*
* Set up console.
*/
cons_probe();
/*
* March through the device switch probing for things.
*/
for (i = 0; devsw[i] != NULL; i++)
if (devsw[i]->dv_init != NULL)
(devsw[i]->dv_init)();
printf("\n");
printf("%s, Revision %s\n", bootprog_name, bootprog_rev);
printf("(%s, %s)\n", bootprog_maker, bootprog_date);
printf("Memory: %lldKB\n", memsize() / 1024);
OF_getprop(chosen, "bootpath", bootpath, 64);
ch = strchr(bootpath, ':');
*ch = '\0';
printf("Booted from: %s\n", bootpath);
printf("\n");
/*
* Only parse the first bootarg if present. It should
* be simple to handle extra arguments
*/
OF_getprop(chosen, "bootargs", bootargs, sizeof(bootargs));
bargc = 0;
parse(&bargc, &bargv, bootargs);
if (bargc == 1)
env_setenv("currdev", EV_VOLATILE, bargv[0], ofw_setcurrdev,
env_nounset);
else
env_setenv("currdev", EV_VOLATILE, bootpath,
ofw_setcurrdev, env_nounset);
env_setenv("loaddev", EV_VOLATILE, bootpath, env_noset,
env_nounset);
setenv("LINES", "24", 1); /* optional */
archsw.arch_getdev = ofw_getdev;
archsw.arch_copyin = ofw_copyin;
archsw.arch_copyout = ofw_copyout;
archsw.arch_readin = ofw_readin;
archsw.arch_autoload = ofw_autoload;
interact(NULL); /* doesn't return */
OF_exit();
return 0;
}
COMMAND_SET(halt, "halt", "halt the system", command_halt);
static int
command_halt(int argc, char *argv[])
{
OF_exit();
return (CMD_OK);
}
COMMAND_SET(memmap, "memmap", "print memory map", command_memmap);
int
command_memmap(int argc, char **argv)
{
ofw_memmap(acells);
return (CMD_OK);
}