513 lines
12 KiB
C
513 lines
12 KiB
C
/* $NetBSD: machdep.c,v 1.2 2003/04/26 11:05:12 ragge 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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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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/param.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/user.h>
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#include <sys/reboot.h>
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#include <sys/properties.h>
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#include <sys/ksyms.h>
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#include <uvm/uvm_extern.h>
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#include <net/netisr.h>
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#include <machine/explora.h>
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#include <machine/bus.h>
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#include <machine/powerpc.h>
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#include <machine/trap.h>
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#include <powerpc/spr.h>
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#include <powerpc/ibm4xx/dcr403cgx.h>
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#include "ksyms.h"
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#if NKSYMS || defined(DDB) || defined(LKM)
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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 cpu_model[80];
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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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extern struct user *proc0paddr;
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struct propdb *board_info = NULL;
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struct vm_map *phys_map = NULL;
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struct vm_map *mb_map = NULL;
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struct vm_map *exec_map = NULL;
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char msgbuf[MSGBUFSIZE];
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paddr_t msgbuf_paddr;
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static unsigned cpuspeed = 66000000;
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static unsigned memsize;
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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 bootstrap(u_int, u_int);
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static void install_extint(void (*)(void));
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int lcsplx(int);
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/*
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* Trap vectors
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*/
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extern int defaulttrap, defaultsize;
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extern int sctrap, scsize;
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extern int alitrap, alisize;
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extern int dsitrap, dsisize;
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extern int isitrap, isisize;
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extern int mchktrap, mchksize;
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extern int tlbimiss4xx, tlbim4size;
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extern int tlbdmiss4xx, tlbdm4size;
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extern int pitfitwdog, pitfitwdogsize;
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extern int debugtrap, debugsize;
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extern int errata51handler, errata51size;
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#ifdef DDB
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extern int ddblow, ddbsize;
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#endif
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static struct {
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int vector;
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void *addr;
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void *size;
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} trap_table[] = {
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{ EXC_SC, &sctrap, &scsize },
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{ EXC_ALI, &alitrap, &alisize },
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{ EXC_DSI, &dsitrap, &dsisize },
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{ EXC_ISI, &isitrap, &isisize },
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{ EXC_MCHK, &mchktrap, &mchksize },
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{ EXC_ITMISS, &tlbimiss4xx, &tlbim4size },
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{ EXC_DTMISS, &tlbdmiss4xx, &tlbdm4size },
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{ EXC_PIT, &pitfitwdog, &pitfitwdogsize },
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{ EXC_DEBUG, &debugtrap, &debugsize },
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{ (EXC_DTMISS|EXC_ALI), &errata51handler, &errata51size },
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#if defined(DDB)
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{ EXC_PGM, &ddblow, &ddbsize },
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#endif /* DDB */
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};
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static void
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set_tlb(int idx, u_int addr, u_int flags)
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{
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u_int lo, hi;
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addr &= ~(TLB_PG_SIZE-1);
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lo = addr | TLB_EX | TLB_WR | flags;
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#ifdef PPC_4XX_NOCACHE
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lo |= TLB_I;
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#endif
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hi = addr | TLB_VALID | TLB_PG_16M;
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asm volatile(
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" tlbwe %1,%0,1 \n"
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" tlbwe %2,%0,0 \n"
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" sync \n"
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: : "r" (idx), "r" (lo), "r" (hi) );
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}
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void
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bootstrap(u_int startkernel, u_int 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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struct cpu_info * const ci = &cpu_info[0];
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consinit();
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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" (1) );
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/*
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* Setup initial tlbs.
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* Physical memory is mapped into the first (reserved) tlbs.
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* Memory of potential console devices is mapped into the
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* last tlbs. They are only needed until the devices are configured.
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*/
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t = 0;
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for (maddr = 0; maddr < phys_mem[0].size; maddr += TLB_PG_SIZE)
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set_tlb(t++, maddr, 0);
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t = NTLB-1;
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set_tlb(t--, BASE_FB, TLB_I | TLB_G);
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set_tlb(t--, BASE_FB2, TLB_I | TLB_G);
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set_tlb(t--, BASE_COM, TLB_I | TLB_G);
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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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/* Initialize cache info for memcpy, etc. */
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cpu_probe_cache();
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/*
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* Initialize lwp0 and current pcb and pmap pointers.
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*/
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lwp0.l_cpu = ci;
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lwp0.l_addr = proc0paddr;
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memset(lwp0.l_addr, 0, sizeof *lwp0.l_addr);
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curpcb = &proc0paddr->u_pcb;
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curpm = curpcb->pcb_pmreal = curpcb->pcb_pm = pmap_kernel();
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/*
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* Install trap vectors.
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*/
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for (i = EXC_RSVD; i <= EXC_LAST; i += 0x100)
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memcpy((void *)i, &defaulttrap, (size_t)&defaultsize);
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for (i = 0; i < sizeof(trap_table)/sizeof(trap_table[0]); i++) {
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memcpy((void *)trap_table[i].vector, trap_table[i].addr,
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(size_t)trap_table[i].size);
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}
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__syncicache((void *)EXC_RST, EXC_LAST - EXC_RST + 0x100);
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/*
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* Set Exception vector base.
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* Handle trap instruction as PGM exception.
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*/
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mtspr(SPR_EVPR, 0);
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t = mfspr(SPR_DBCR0);
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t &= ~DBCR0_TDE;
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mtspr(SPR_DBCR0, t);
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/*
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* External interrupt handler install.
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*/
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install_extint(ext_intr);
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/*
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* Now enable translation (and machine checks/recoverable interrupts).
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*/
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asm volatile (
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" mfmsr %0 \n"
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" ori %0,%0,%1 \n"
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" mtmsr %0 \n"
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" sync \n"
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: : "r" (0), "K" (PSL_IR|PSL_DR|PSL_ME) );
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uvm_setpagesize();
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/*
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* Initialize pmap module.
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*/
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pmap_bootstrap(startkernel, endkernel);
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#if NKSYMS || defined(DDB) || defined(LKM)
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ksyms_init(0, NULL, NULL);
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#endif
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fake_mapiodev = 0;
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}
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static void
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install_extint(void (*handler)(void))
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{
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extern int extint, extsize;
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extern u_long extint_call;
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u_long offset = (u_long)handler - (u_long)&extint_call;
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int omsr, msr;
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#ifdef DIAGNOSTIC
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if (offset > 0x1ffffff)
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panic("install_extint: too far away");
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#endif
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asm volatile (
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" mfmsr %0 \n"
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" andi. %1,%0,%2 \n"
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" mtmsr %1 \n"
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: "=r" (omsr), "=r" (msr) : "K" ((u_short)~PSL_EE) );
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extint_call = (extint_call & 0xfc000003) | offset;
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memcpy((void *)EXC_EXI, &extint, (size_t)&extsize);
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__syncicache((void *)&extint_call, sizeof extint_call);
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__syncicache((void *)EXC_EXI, (int)&extsize);
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asm volatile (
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" mtmsr %0 \n"
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: : "r" (omsr) );
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}
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void
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cpu_startup(void)
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{
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caddr_t v;
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vaddr_t minaddr, maxaddr;
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u_int sz, i, base, residual;
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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((caddr_t)msgbuf, round_page(MSGBUFSIZE));
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printf("%s", version);
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printf("NCD Explora451\n");
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memsize = ctob(physmem);
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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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/*
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* Find out how much space we need, allocate it,
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* and then give everything true virtual addresses.
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*/
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sz = (u_int)allocsys(NULL, NULL);
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if ((v = (caddr_t)uvm_km_zalloc(kernel_map, round_page(sz))) == 0)
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panic("startup: no room for tables");
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if (allocsys(v, NULL) - v != sz)
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panic("startup: table size inconsistency");
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/*
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* Now allocate buffers proper. They are different than the above
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* in that they usually occupy more virtual memory than physical.
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*/
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sz = MAXBSIZE * nbuf;
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minaddr = 0;
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if (uvm_map(kernel_map, (vaddr_t *)&minaddr, round_page(sz),
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NULL, UVM_UNKNOWN_OFFSET, 0,
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UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE,
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UVM_ADV_NORMAL, 0)) != 0)
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panic("startup: cannot allocate VM for buffers");
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buffers = (char *)minaddr;
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base = bufpages / nbuf;
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residual = bufpages % nbuf;
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if (base >= MAXBSIZE) {
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/* Don't want to alloc more physical mem than ever needed */
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base = MAXBSIZE;
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residual = 0;
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}
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for (i = 0; i < nbuf; i++) {
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vsize_t curbufsize;
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vaddr_t curbuf;
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struct vm_page *pg;
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curbuf = (vaddr_t)buffers + i * MAXBSIZE;
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curbufsize = NBPG * (i < residual ? base + 1 : base);
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while (curbufsize) {
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pg = uvm_pagealloc(NULL, 0, NULL, 0);
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if (pg == NULL)
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panic("cpu_startup: not enough memory for "
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"buffer cache");
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pmap_kenter_pa(curbuf, VM_PAGE_TO_PHYS(pg),
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VM_PROT_READ | VM_PROT_WRITE);
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curbuf += PAGE_SIZE;
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curbufsize -= PAGE_SIZE;
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}
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}
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/*
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* Allocate a submap for exec arguments. This map effectively
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* limits the number of processes exec'ing at any time.
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*/
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exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr,
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16*NCARGS, VM_MAP_PAGEABLE, FALSE, NULL);
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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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format_bytes(pbuf, sizeof(pbuf), bufpages * NBPG);
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printf("using %u buffers containing %s of memory\n", nbuf, pbuf);
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/*
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* Set up the buffers.
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*/
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bufinit();
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/*
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* Set up the board properties database.
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*/
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if (!(board_info = propdb_create("board info")))
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panic("Cannot create board info database");
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if (board_info_set("processor-frequency", &cpuspeed,
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sizeof(&cpuspeed), PROP_CONST, 0))
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panic("setting processor-frequency");
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if (board_info_set("mem-size", &memsize,
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sizeof(&memsize), PROP_CONST, 0))
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panic("setting mem-size");
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}
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int
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lcsplx(int ipl)
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{
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return spllower(ipl); /*XXX*/
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}
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void
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softnet(void)
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{
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int isr;
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isr = netisr;
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netisr = 0;
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#define DONETISR(bit, fn) \
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do { \
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if (isr & (1 << bit)) \
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fn(); \
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} while (0)
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#include <net/netisr_dispatch.h>
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#undef DONETISR
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}
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#include "com.h"
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void
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softserial(void)
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{
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#if NCOM > 0
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void comsoft(void); /* XXX from dev/ic/com.c */
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comsoft();
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#endif
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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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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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inittodr(time_t base)
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{
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if (base > 365*24*60*60 && time.tv_sec < 365*24*60*60)
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time.tv_sec = base;
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}
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void
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resettodr(void)
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{
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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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