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263 lines
6.4 KiB
C
263 lines
6.4 KiB
C
/* $NetBSD: machdep.c,v 1.37 2012/07/27 22:13:58 matt Exp $ */
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/*-
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* Copyright (c) 2003 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Juergen Hannken-Illjes.
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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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.37 2012/07/27 22:13:58 matt Exp $");
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#include "opt_explora.h"
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#include "opt_modular.h"
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#include "ksyms.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/buf.h>
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#include <sys/msgbuf.h>
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#include <sys/kernel.h>
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#include <sys/mount.h>
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#include <sys/proc.h>
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#include <sys/reboot.h>
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#include <sys/ksyms.h>
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#include <sys/device.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <sys/cpu.h>
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#include <uvm/uvm_extern.h>
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#include <prop/proplib.h>
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#include <machine/explora.h>
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#include <machine/powerpc.h>
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#include <machine/tlb.h>
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#include <machine/pcb.h>
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#include <machine/trap.h>
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#include <powerpc/spr.h>
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#include <powerpc/ibm4xx/spr.h>
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#include <powerpc/ibm4xx/cpu.h>
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#include <powerpc/ibm4xx/dcr403cgx.h>
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#if NKSYMS || defined(DDB) || defined(MODULAR)
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#include <machine/db_machdep.h>
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#include <ddb/db_extern.h>
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#endif
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#define MEMREGIONS 2
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#define TLB_PG_SIZE (16*1024*1024)
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char machine[] = MACHINE; /* from <machine/param.h> */
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char machine_arch[] = MACHINE_ARCH; /* from <machine/param.h> */
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static const unsigned int cpuspeed = 66000000;
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prop_dictionary_t board_properties;
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struct vm_map *phys_map = NULL;
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static struct mem_region phys_mem[MEMREGIONS];
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static struct mem_region avail_mem[MEMREGIONS];
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void initppc(vaddr_t, vaddr_t);
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void
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initppc(vaddr_t startkernel, vaddr_t endkernel)
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{
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u_int i, j, t, br[4];
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u_int maddr, msize, size;
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br[0] = mfdcr(DCR_BR4);
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br[1] = mfdcr(DCR_BR5);
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br[2] = mfdcr(DCR_BR6);
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br[3] = mfdcr(DCR_BR7);
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for (i = 0; i < 4; i++)
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for (j = i+1; j < 4; j++)
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if (br[j] < br[i])
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t = br[j], br[j] = br[i], br[i] = t;
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for (i = 0, size = 0; i < 4; i++) {
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if (((br[i] >> 19) & 3) != 3)
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continue;
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maddr = ((br[i] >> 24) & 0xff) << 20;
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msize = 1 << (20 + ((br[i] >> 21) & 7));
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if (maddr+msize > size)
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size = maddr+msize;
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}
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phys_mem[0].start = 0;
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phys_mem[0].size = size & ~PGOFSET;
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avail_mem[0].start = startkernel;
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avail_mem[0].size = size-startkernel;
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__asm volatile(
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" mtpid %0 \n"
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" sync \n"
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: : "r" (KERNEL_PID) );
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/*
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* Setup initial tlbs.
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* Kernel memory and console device are
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* mapped into the first (reserved) tlbs.
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*/
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for (maddr = 0; maddr < endkernel; maddr += TLB_PG_SIZE)
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ppc4xx_tlb_reserve(maddr, maddr, TLB_PG_SIZE, TLB_EX);
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/* Map PCKBC, PCKBC2, COM, LPT. This is far beyond physmem. */
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ppc4xx_tlb_reserve(BASE_ISA, BASE_ISA, TLB_PG_SIZE, TLB_I | TLB_G);
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#ifndef COM_IS_CONSOLE
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ppc4xx_tlb_reserve(BASE_FB, BASE_FB, TLB_PG_SIZE, TLB_I | TLB_G);
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ppc4xx_tlb_reserve(BASE_FB2, BASE_FB2, TLB_PG_SIZE, TLB_I | TLB_G);
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#endif
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/* Disable all external interrupts */
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mtdcr(DCR_EXIER, 0);
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/* Disable all timer interrupts */
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mtspr(SPR_TCR, 0);
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ibm4xx_init(startkernel, endkernel, pic_ext_intr);
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}
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void
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cpu_startup(void)
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{
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vaddr_t minaddr, maxaddr;
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prop_number_t pn;
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char pbuf[9];
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/*
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* Initialize error message buffer (before start of kernel)
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*/
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initmsgbuf((void *)msgbuf, round_page(MSGBUFSIZE));
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printf("%s%s", copyright, version);
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printf("NCD Explora451\n");
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format_bytes(pbuf, sizeof(pbuf), ctob(physmem));
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printf("total memory = %s\n", pbuf);
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minaddr = 0;
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/*
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* Allocate a submap for physio
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*/
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phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr,
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VM_PHYS_SIZE, 0, false, NULL);
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/*
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* No need to allocate an mbuf cluster submap. Mbuf clusters
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* are allocated via the pool allocator, and we use direct-mapped
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* pool pages.
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*/
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format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free));
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printf("avail memory = %s\n", pbuf);
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/*
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* Set up the board properties database.
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*/
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board_properties = prop_dictionary_create();
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KASSERT(board_properties != NULL);
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pn = prop_number_create_integer(ctob(physmem));
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KASSERT(pn != NULL);
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if (prop_dictionary_set(board_properties, "mem-size", pn) == false)
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panic("setting mem-size");
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prop_object_release(pn);
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pn = prop_number_create_integer(cpuspeed);
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KASSERT(pn != NULL);
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if (prop_dictionary_set(board_properties, "processor-frequency",
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pn) == false)
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panic("setting processor-frequency");
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prop_object_release(pn);
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intr_init();
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/*
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* Look for the ibm4xx modules in the right place.
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*/
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module_machine = module_machine_ibm4xx;
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fake_mapiodev = 0;
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}
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void
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cpu_reboot(int howto, char *what)
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{
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static int syncing = 0;
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boothowto = howto;
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if (!cold && !(howto & RB_NOSYNC) && !syncing) {
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syncing = 1;
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vfs_shutdown();
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resettodr();
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}
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splhigh();
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if (!cold && (howto & RB_DUMP))
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/*XXX dumpsys()*/;
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doshutdownhooks();
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pmf_system_shutdown(boothowto);
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if (howto & RB_HALT) {
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printf("halted\n\n");
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while (1)
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;
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}
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printf("rebooting\n\n");
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/* flush cache for msgbuf */
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__syncicache((void *)msgbuf_paddr, round_page(MSGBUFSIZE));
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ppc4xx_reset();
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#ifdef DDB
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while (1)
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Debugger();
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#else
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while (1)
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;
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#endif
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}
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void
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mem_regions(struct mem_region **mem, struct mem_region **avail)
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{
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*mem = phys_mem;
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*avail = avail_mem;
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}
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