293 lines
7.3 KiB
C
293 lines
7.3 KiB
C
/*-
|
|
* Copyright (c) 2006 Wojciech A. Koszek <wkoszek@FreeBSD.org>
|
|
* Copyright (c) 2012-2014 Robert N. M. Watson
|
|
* All rights reserved.
|
|
*
|
|
* This software was developed by SRI International and the University of
|
|
* Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
|
|
* ("CTSRD"), as part of the DARPA CRASH research programme.
|
|
*
|
|
* 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 "opt_ddb.h"
|
|
#include "opt_platform.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/conf.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/imgact.h>
|
|
#include <sys/bio.h>
|
|
#include <sys/buf.h>
|
|
#include <sys/bus.h>
|
|
#include <sys/cpu.h>
|
|
#include <sys/cons.h>
|
|
#include <sys/exec.h>
|
|
#include <sys/linker.h>
|
|
#include <sys/ucontext.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/kdb.h>
|
|
#include <sys/ptrace.h>
|
|
#include <sys/reboot.h>
|
|
#include <sys/signalvar.h>
|
|
#include <sys/sysent.h>
|
|
#include <sys/sysproto.h>
|
|
#include <sys/user.h>
|
|
|
|
#ifdef FDT
|
|
#include <dev/fdt/fdt_common.h>
|
|
#include <dev/ofw/openfirm.h>
|
|
#endif
|
|
|
|
#include <vm/vm.h>
|
|
#include <vm/vm_object.h>
|
|
#include <vm/vm_page.h>
|
|
|
|
#include <machine/bootinfo.h>
|
|
#include <machine/clock.h>
|
|
#include <machine/cpu.h>
|
|
#include <machine/cpuregs.h>
|
|
#include <machine/hwfunc.h>
|
|
#include <machine/md_var.h>
|
|
#include <machine/metadata.h>
|
|
#include <machine/pmap.h>
|
|
#include <machine/trap.h>
|
|
|
|
extern int *edata;
|
|
extern int *end;
|
|
|
|
void
|
|
platform_cpu_init()
|
|
{
|
|
/* Nothing special */
|
|
}
|
|
|
|
static void
|
|
mips_init(void)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < 10; i++) {
|
|
phys_avail[i] = 0;
|
|
}
|
|
|
|
/* phys_avail regions are in bytes */
|
|
phys_avail[0] = MIPS_KSEG0_TO_PHYS(kernel_kseg0_end);
|
|
phys_avail[1] = ctob(realmem);
|
|
|
|
dump_avail[0] = phys_avail[0];
|
|
dump_avail[1] = phys_avail[1];
|
|
|
|
physmem = realmem;
|
|
|
|
init_param1();
|
|
init_param2(physmem);
|
|
mips_cpu_init();
|
|
pmap_bootstrap();
|
|
mips_proc0_init();
|
|
mutex_init();
|
|
kdb_init();
|
|
#ifdef KDB
|
|
if (boothowto & RB_KDB)
|
|
kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger");
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Perform a board-level soft-reset.
|
|
*/
|
|
void
|
|
platform_reset(void)
|
|
{
|
|
|
|
/* XXX SMP will likely require us to do more. */
|
|
__asm__ __volatile__(
|
|
"mfc0 $k0, $12\n\t"
|
|
"li $k1, 0x00100000\n\t"
|
|
"or $k0, $k0, $k1\n\t"
|
|
"mtc0 $k0, $12\n");
|
|
for( ; ; )
|
|
__asm__ __volatile("wait");
|
|
}
|
|
|
|
#ifdef FDT
|
|
/* Parse cmd line args as env - copied from xlp_machdep. */
|
|
/* XXX-BZ this should really be centrally provided for all (boot) code. */
|
|
static void
|
|
_parse_bootargs(char *cmdline)
|
|
{
|
|
char *n, *v;
|
|
|
|
while ((v = strsep(&cmdline, " \n")) != NULL) {
|
|
if (*v == '\0')
|
|
continue;
|
|
if (*v == '-') {
|
|
while (*v != '\0') {
|
|
v++;
|
|
switch (*v) {
|
|
case 'a': boothowto |= RB_ASKNAME; break;
|
|
/* Someone should simulate that ;-) */
|
|
case 'C': boothowto |= RB_CDROM; break;
|
|
case 'd': boothowto |= RB_KDB; break;
|
|
case 'D': boothowto |= RB_MULTIPLE; break;
|
|
case 'm': boothowto |= RB_MUTE; break;
|
|
case 'g': boothowto |= RB_GDB; break;
|
|
case 'h': boothowto |= RB_SERIAL; break;
|
|
case 'p': boothowto |= RB_PAUSE; break;
|
|
case 'r': boothowto |= RB_DFLTROOT; break;
|
|
case 's': boothowto |= RB_SINGLE; break;
|
|
case 'v': boothowto |= RB_VERBOSE; break;
|
|
}
|
|
}
|
|
} else {
|
|
n = strsep(&v, "=");
|
|
if (v == NULL)
|
|
kern_setenv(n, "1");
|
|
else
|
|
kern_setenv(n, v);
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
void
|
|
platform_start(__register_t a0, __register_t a1, __register_t a2,
|
|
__register_t a3)
|
|
{
|
|
struct bootinfo *bootinfop;
|
|
vm_offset_t kernend;
|
|
uint64_t platform_counter_freq;
|
|
int argc = a0;
|
|
char **argv = (char **)a1;
|
|
char **envp = (char **)a2;
|
|
long memsize;
|
|
#ifdef FDT
|
|
char buf[2048]; /* early stack supposedly big enough */
|
|
vm_offset_t dtbp;
|
|
phandle_t chosen;
|
|
void *kmdp;
|
|
#endif
|
|
int i;
|
|
|
|
/* clear the BSS and SBSS segments */
|
|
kernend = (vm_offset_t)&end;
|
|
memset(&edata, 0, kernend - (vm_offset_t)(&edata));
|
|
|
|
mips_postboot_fixup();
|
|
|
|
mips_pcpu0_init();
|
|
|
|
/*
|
|
* Over time, we've changed out boot-time binary interface for the
|
|
* kernel. Miniboot simply provides a 'memsize' in a3, whereas the
|
|
* FreeBSD boot loader provides a 'bootinfo *' in a3. While slightly
|
|
* grody, we support both here by detecting 'pointer-like' values in
|
|
* a3 and assuming physical memory can never be that back.
|
|
*
|
|
* XXXRW: Pull more values than memsize out of bootinfop -- e.g.,
|
|
* module information.
|
|
*/
|
|
if (a3 >= 0x9800000000000000ULL) {
|
|
bootinfop = (void *)a3;
|
|
memsize = bootinfop->bi_memsize;
|
|
preload_metadata = (caddr_t)bootinfop->bi_modulep;
|
|
} else {
|
|
bootinfop = NULL;
|
|
memsize = a3;
|
|
}
|
|
|
|
#ifdef FDT
|
|
/*
|
|
* Find the dtb passed in by the boot loader (currently fictional).
|
|
*/
|
|
kmdp = preload_search_by_type("elf kernel");
|
|
if (kmdp != NULL)
|
|
dtbp = MD_FETCH(kmdp, MODINFOMD_DTBP, vm_offset_t);
|
|
else
|
|
dtbp = (vm_offset_t)NULL;
|
|
|
|
#if defined(FDT_DTB_STATIC)
|
|
/*
|
|
* In case the device tree blob was not retrieved (from metadata) try
|
|
* to use the statically embedded one.
|
|
*/
|
|
if (dtbp == (vm_offset_t)NULL)
|
|
dtbp = (vm_offset_t)&fdt_static_dtb;
|
|
#else
|
|
#error "Non-static FDT not yet supported on BERI"
|
|
#endif
|
|
|
|
if (OF_install(OFW_FDT, 0) == FALSE)
|
|
while (1);
|
|
if (OF_init((void *)dtbp) != 0)
|
|
while (1);
|
|
|
|
/*
|
|
* Configure more boot-time parameters passed in by loader.
|
|
*/
|
|
boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int);
|
|
kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *);
|
|
|
|
/*
|
|
* Get bootargs from FDT if specified.
|
|
*/
|
|
chosen = OF_finddevice("/chosen");
|
|
if (OF_getprop(chosen, "bootargs", buf, sizeof(buf)) != -1)
|
|
_parse_bootargs(buf);
|
|
#endif
|
|
|
|
/*
|
|
* XXXRW: We have no way to compare wallclock time to cycle rate on
|
|
* BERI, so for now assume we run at the MALTA default (100MHz).
|
|
*/
|
|
platform_counter_freq = MIPS_DEFAULT_HZ;
|
|
mips_timer_early_init(platform_counter_freq);
|
|
|
|
cninit();
|
|
printf("entry: platform_start()\n");
|
|
|
|
bootverbose = 1;
|
|
if (bootverbose) {
|
|
printf("cmd line: ");
|
|
for (i = 0; i < argc; i++)
|
|
printf("%s ", argv[i]);
|
|
printf("\n");
|
|
|
|
printf("envp:\n");
|
|
for (i = 0; envp[i]; i += 2)
|
|
printf("\t%s = %s\n", envp[i], envp[i+1]);
|
|
|
|
if (bootinfop != NULL)
|
|
printf("bootinfo found at %p\n", bootinfop);
|
|
|
|
printf("memsize = %p\n", (void *)memsize);
|
|
}
|
|
|
|
realmem = btoc(memsize);
|
|
mips_init();
|
|
|
|
mips_timer_init_params(platform_counter_freq, 0);
|
|
}
|