265 lines
5.4 KiB
C
265 lines
5.4 KiB
C
/*-
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* Copyright (c) 2007 Bruce M. Simpson.
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* 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 AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <machine/cpuregs.h>
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#include "opt_ddb.h"
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#include "opt_kdb.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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#ifdef CFE
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#include <dev/cfe/cfe_api.h>
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#endif
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#include "sb_scd.h"
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#ifdef DDB
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#ifndef KDB
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#error KDB must be enabled in order for DDB to work!
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#endif
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#endif
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#ifdef CFE_ENV
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extern void cfe_env_init(void);
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#endif
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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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static void
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mips_init(void)
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{
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int i, cfe_mem_idx, tmp;
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uint64_t maxmem;
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#ifdef CFE_ENV
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cfe_env_init();
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#endif
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TUNABLE_INT_FETCH("boothowto", &boothowto);
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if (boothowto & RB_VERBOSE)
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bootverbose++;
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#ifdef MAXMEM
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tmp = MAXMEM;
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#else
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tmp = 0;
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#endif
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TUNABLE_INT_FETCH("hw.physmem", &tmp);
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maxmem = (uint64_t)tmp * 1024;
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#ifdef CFE
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/*
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* Query DRAM memory map from CFE.
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*/
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physmem = 0;
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cfe_mem_idx = 0;
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for (i = 0; i < 10; i += 2) {
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int result;
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uint64_t addr, len, type;
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result = cfe_enummem(cfe_mem_idx++, 0, &addr, &len, &type);
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if (result < 0) {
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phys_avail[i] = phys_avail[i + 1] = 0;
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break;
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}
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KASSERT(type == CFE_MI_AVAILABLE,
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("CFE DRAM region is not available?"));
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if (bootverbose)
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printf("cfe_enummem: 0x%016jx/%llu.\n", addr, len);
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if (maxmem != 0) {
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if (addr >= maxmem) {
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printf("Ignoring %llu bytes of memory at 0x%jx "
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"that is above maxmem %dMB\n",
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len, addr,
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(int)(maxmem / (1024 * 1024)));
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continue;
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}
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if (addr + len > maxmem) {
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printf("Ignoring %llu bytes of memory "
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"that is above maxmem %dMB\n",
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(addr + len) - maxmem,
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(int)(maxmem / (1024 * 1024)));
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len = maxmem - addr;
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}
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}
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phys_avail[i] = addr;
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if (i == 0 && addr == 0) {
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/*
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* If this is the first physical memory segment probed
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* from CFE, omit the region at the start of physical
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* memory where the kernel has been loaded.
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*/
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phys_avail[i] += MIPS_KSEG0_TO_PHYS((vm_offset_t)&end);
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}
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phys_avail[i + 1] = addr + len;
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physmem += len;
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}
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realmem = btoc(physmem);
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#endif
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physmem = realmem;
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init_param1();
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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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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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/*
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* XXX SMP
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* XXX flush data caches
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*/
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sb_system_reset();
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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, __register_t a2,
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__register_t a3)
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{
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vm_offset_t kernend;
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/* clear the BSS and SBSS segments */
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memset(&edata, 0, (vm_offset_t)&end - (vm_offset_t)&edata);
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kernend = round_page((vm_offset_t)&end);
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/* Initialize pcpu stuff */
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mips_pcpu0_init();
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#ifdef CFE
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/*
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* Initialize CFE firmware trampolines before
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* we initialize the low-level console.
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*
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* CFE passes the following values in registers:
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* a0: firmware handle
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* a2: firmware entry point
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* a3: entry point seal
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*/
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if (a3 == CFE_EPTSEAL)
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cfe_init(a0, a2);
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#endif
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cninit();
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mips_init();
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mips_timer_init_params(sb_cpu_speed(), 0);
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}
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