8a360e9b89
symbols resolving in DDB
- When zeroing .bss/.sbss do not round end address to page boundary,
it's not neccessary and might destroy data pased by trampoline or
boot loader
202 lines
4.5 KiB
C
202 lines
4.5 KiB
C
/*-
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* Copyright (C) 2007 by Oleksandr Tymoshenko. 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 ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $Id: $
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_ddb.h"
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#include <sys/param.h>
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#include <sys/conf.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/imgact.h>
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#include <sys/bio.h>
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#include <sys/buf.h>
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#include <sys/bus.h>
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#include <sys/cpu.h>
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#include <sys/cons.h>
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#include <sys/exec.h>
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#include <sys/ucontext.h>
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#include <sys/proc.h>
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#include <sys/kdb.h>
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#include <sys/ptrace.h>
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#include <sys/reboot.h>
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#include <sys/signalvar.h>
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#include <sys/sysent.h>
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#include <sys/sysproto.h>
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#include <sys/user.h>
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#include <vm/vm.h>
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#include <vm/vm_object.h>
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#include <vm/vm_page.h>
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#include <vm/vm_pager.h>
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#include <machine/cache.h>
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#include <machine/clock.h>
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#include <machine/cpu.h>
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#include <machine/cpuinfo.h>
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#include <machine/cpufunc.h>
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#include <machine/cpuregs.h>
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#include <machine/hwfunc.h>
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#include <machine/intr_machdep.h>
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#include <machine/locore.h>
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#include <machine/md_var.h>
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#include <machine/pte.h>
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#include <machine/sigframe.h>
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#include <machine/trap.h>
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#include <machine/vmparam.h>
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extern int *edata;
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extern int *end;
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void
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platform_cpu_init()
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{
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/* Nothing special */
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}
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void
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platform_halt(void)
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{
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}
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void
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platform_identify(void)
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{
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}
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void
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platform_reset(void)
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{
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volatile unsigned int * p = (void *)0xb8008000;
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/*
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* TODO: we should take care of TLB stuff here. Otherwise
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* board does not boots properly next time
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*/
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/* Write 0x8000_0001 to the Reset register */
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*p = 0x80000001;
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__asm __volatile("li $25, 0xbfc00000");
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__asm __volatile("j $25");
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}
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void
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platform_trap_enter(void)
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{
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}
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void
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platform_trap_exit(void)
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{
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}
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void
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platform_start(__register_t a0, __register_t a1,
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__register_t a2 __unused, __register_t a3 __unused)
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{
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uint64_t platform_counter_freq;
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vm_offset_t kernend;
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int argc = a0;
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char **argv = (char **)a1;
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int i, mem;
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/* clear the BSS and SBSS segments */
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kernend = (vm_offset_t)&end;
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memset(&edata, 0, kernend - (vm_offset_t)(&edata));
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mips_postboot_fixup();
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/* Initialize pcpu stuff */
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mips_pcpu0_init();
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/*
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* Looking for mem=XXM argument
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*/
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mem = 0; /* Just something to start with */
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for (i=0; i < argc; i++) {
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if (strncmp(argv[i], "mem=", 4) == 0) {
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mem = strtol(argv[i] + 4, NULL, 0);
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break;
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}
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}
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bootverbose = 1;
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if (mem > 0)
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realmem = btoc(mem << 20);
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else
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realmem = btoc(32 << 20);
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for (i = 0; i < 10; i++) {
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phys_avail[i] = 0;
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}
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/* phys_avail regions are in bytes */
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phys_avail[0] = MIPS_KSEG0_TO_PHYS(kernel_kseg0_end);
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phys_avail[1] = ctob(realmem);
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physmem = realmem;
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/*
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* ns8250 uart code uses DELAY so ticker should be inititalized
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* before cninit. And tick_init_params refers to hz, so * init_param1
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* should be called first.
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*/
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init_param1();
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/* TODO: parse argc,argv */
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platform_counter_freq = 330000000UL;
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mips_timer_init_params(platform_counter_freq, 1);
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cninit();
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/* Panic here, after cninit */
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if (mem == 0)
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panic("No mem=XX parameter in arguments");
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printf("cmd line: ");
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for (i=0; i < argc; i++)
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printf("%s ", argv[i]);
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printf("\n");
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init_param2(physmem);
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mips_cpu_init();
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pmap_bootstrap();
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mips_proc0_init();
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mutex_init();
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kdb_init();
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#ifdef KDB
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if (boothowto & RB_KDB)
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kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger");
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#endif
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}
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