312af517e3
implementations or no implementation on all platforms. Some of these functions might be good ideas, but their semantics were unclear given the lack of implementation, and an unlucky porter could be fooled into trying to implement them or, worse, being baffled when something like platform_trap_enter() failed to be called.
180 lines
4.4 KiB
C
180 lines
4.4 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_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_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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dump_avail[0] = phys_avail[0];
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dump_avail[1] = phys_avail[1];
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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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