d974db0ada
This branch was a major cleanup and rototill of many of the various OEA cpu based PPC ports that focused on sharing as much code as possible between the various ports to eliminate near-identical copies of files in every tree. Additionally there is a new PIC system that unifies the interface to interrupt code for all different OEA ppc arches. The work for this branch was done by a variety of people, too long to list here. TODO: bebox still needs work to complete the transition to -renovation. ofppc still needs a bunch of work, which I will be looking at. ev64260 still needs to be renovated amigappc was not attempted. NOTES: pmppc was removed as an arch, and moved to a evbppc target.
487 lines
11 KiB
C
487 lines
11 KiB
C
/* $NetBSD: machdep.c,v 1.5 2007/10/17 19:54:20 garbled Exp $ */
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/*
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* Copyright (c) 2006 Jachym Holecek
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* All rights reserved.
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*
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* Written for DFC Design, s.r.o.
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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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*
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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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*
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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 BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Based on Walnut and Explora.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.5 2007/10/17 19:54:20 garbled Exp $");
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#include "opt_compat_netbsd.h"
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#include "opt_ddb.h"
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#include "opt_ipkdb.h"
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#include "opt_virtex.h"
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#include "opt_kgdb.h"
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#include <sys/param.h>
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#include <sys/buf.h>
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#include <sys/exec.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/mount.h>
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#include <sys/msgbuf.h>
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#include <sys/proc.h>
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#include <sys/reboot.h>
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#include <sys/syscallargs.h>
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#include <sys/syslog.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/user.h>
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#include <sys/boot_flag.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 <dev/cons.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 <evbppc/virtex/dcr.h>
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#include <evbppc/virtex/virtex.h>
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#include "ksyms.h"
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#if defined(DDB)
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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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#if defined(KGDB)
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#include <sys/kgdb.h>
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#endif
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/*
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* Global variables used here and there
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*/
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struct vm_map *exec_map = NULL;
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struct vm_map *mb_map = NULL;
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struct vm_map *phys_map = NULL;
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/*
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* This should probably be in autoconf! XXX
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*/
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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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char bootpath[256];
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paddr_t msgbuf_paddr;
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vaddr_t msgbuf_vaddr;
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#if NKSYMS || defined(DDB) || defined(LKM)
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void *startsym, *endsym;
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#endif
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int lcsplx(int);
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void initppc(u_int, u_int);
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static void dumpsys(void);
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static void install_extint(void (*)(void));
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static void trapcpy(int, void *, size_t);
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/* These two live in powerpc/powerpc/trap_subr.S */
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extern int extint, extsize;
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extern u_long extint_call;
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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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#ifdef IPKDB
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extern int ipkdblow, ipkdbsize;
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#endif
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/* BSS segment start & end. */
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extern char edata[], end[];
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/* One region holds all memory, the other is terminator expected by 405 pmap. */
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#define MEMREGIONS 2
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struct mem_region physmemr[MEMREGIONS];
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struct mem_region availmemr[MEMREGIONS];
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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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} traps[] = {
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/* EXC_EXI handled by install_extint(). */
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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, FIT, WDOG} handlers are spaced by 0x10 bytes only.. */
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{ EXC_PIT, &pitfitwdog, &pitfitwdogsize },
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{ EXC_DEBUG, &debugtrap, &debugsize },
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/* PPC405GP Rev D errata item 51 */
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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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#elif defined(IPKDB)
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{ EXC_PGM, &ipkdblow, &ipkdbsize },
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#endif
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};
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/* Maximum TLB page size. */
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#define TLB_PG_SIZE (16*1024*1024)
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void
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initppc(u_int startkernel, u_int endkernel)
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{
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struct cpu_info * const ci = curcpu();
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u_int addr, memsize;
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int exc, dbcr0, i;
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/* Initialize cache info for memcpy, memset, etc. */
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cpu_probe_cache();
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memset(physmemr, 0, sizeof(physmemr)); /* [1].size = 0 */
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memset(availmemr, 0, sizeof(availmemr)); /* [1].size = 0 */
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memsize = (PHYSMEM * 1024 * 1024) & ~PGOFSET;
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physmemr[0].start = 0;
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physmemr[0].size = memsize;
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availmemr[0].start = startkernel;
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availmemr[0].size = memsize - availmemr[0].start;
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/* Map kernel memory linearly. */
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for (addr = 0; addr < endkernel; addr += TLB_PG_SIZE)
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ppc4xx_tlb_reserve(addr, addr, TLB_PG_SIZE, TLB_EX);
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/* Give design-specific code a hint for reserved mappings. */
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virtex_machdep_init(roundup(memsize, TLB_PG_SIZE), TLB_PG_SIZE,
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physmemr, availmemr);
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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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curpcb->pcb_pm = pmap_kernel();
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for (exc = EXC_RSVD; exc <= EXC_LAST; exc += 0x100)
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trapcpy(exc, &defaulttrap, (size_t)&defaultsize);
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for (i = 0; i < __arraycount(traps); i++)
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trapcpy(traps[i].vector, traps[i].addr, (size_t)traps[i].size);
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__syncicache((void *)EXC_RST, EXC_LAST - EXC_RST + 0x100);
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/* set exception vector base */
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mtspr(SPR_EVPR, 0);
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/* handle trap instruction as PGM exception */
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dbcr0 = mfspr(SPR_DBCR0) & ~DBCR0_TDE;
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mtspr(SPR_DBCR0, dbcr0);
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install_extint(ext_intr);
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/* enable translation */
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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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" isync \n"
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: : "r"(0), "K"(PSL_IR | PSL_DR | PSL_ME));
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/* now that we enabled MMU, we can map console */
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consinit();
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uvm_setpagesize();
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pmap_bootstrap(startkernel, endkernel);
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#if NKSYMS || defined(DDB) || defined(LKM)
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ksyms_init((int)((u_int)endsym - (u_int)startsym), startsym, endsym);
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#endif
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#ifdef DDB
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if (boothowto & RB_KDB)
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Debugger();
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#endif
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#ifdef IPKDB
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/*
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* Now trap to IPKDB
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*/
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ipkdb_init();
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if (boothowto & RB_KDB)
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ipkdb_connect(0);
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#endif
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#ifdef KGDB
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/*
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* Now trap to KGDB
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*/
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kgdb_connect(1);
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#endif /* KGDB */
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}
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/*
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* trapcpy:
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*
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* Install a trap vector. We cannot use memcpy because the
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* destination may be zero. Borrowed from Explora.
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*/
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static void
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trapcpy(int dest, void *src, size_t len)
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{
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uint32_t *dest_p = (void *)dest;
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uint32_t *src_p = src;
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while (len > 0) {
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*dest_p++ = *src_p++;
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len -= sizeof(uint32_t);
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}
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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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u_long offset = (u_long)handler - (u_long)&extint_call;
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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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/* Patch branch target in EXC_EXI handler. */
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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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}
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/*
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* Machine dependent startup code.
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*/
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char msgbuf[MSGBUFSIZE];
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void
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cpu_startup(void)
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{
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/* For use by propdb. */
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static u_int memsize = PHYSMEM * 1024 * 1024;
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static u_int cpuspeed = CPUFREQ * 1000 * 1000;
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prop_number_t pn;
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vaddr_t minaddr, maxaddr;
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char pbuf[9];
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curcpu()->ci_khz = cpuspeed / 1000;
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/* Initialize error message buffer. */
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initmsgbuf((void *)msgbuf, round_page(MSGBUFSIZE));
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printf("%s%s", copyright, version);
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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 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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/*
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* Set up the board properties database.
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*/
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board_info_init();
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pn = prop_number_create_integer(memsize);
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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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/*
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* Now that we have VM, malloc()s are OK in bus_space.
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*/
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bus_space_mallocok();
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fake_mapiodev = 0;
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}
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static void
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dumpsys(void)
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{
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printf("dumpsys: TBD\n");
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}
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/* Hook used by 405 pmap module. */
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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 = physmemr;
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*avail = availmemr;
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}
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/*
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* Halt or reboot the machine after syncing/dumping according to howto.
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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;
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static char str[256];
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char *ap = str, *ap1 = ap;
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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(); /* sync */
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resettodr(); /* set wall clock */
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}
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splhigh();
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if (!cold && (howto & RB_DUMP))
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dumpsys();
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doshutdownhooks();
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if ((howto & RB_POWERDOWN) == RB_POWERDOWN) {
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/* Power off here if we know how...*/
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}
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if (howto & RB_HALT) {
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printf("halted\n\n");
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goto reboot; /* XXX for now... */
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#ifdef DDB
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printf("dropping to debugger\n");
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while(1)
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Debugger();
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#endif
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#ifdef KGDB
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printf("dropping to kgdb\n");
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while(1)
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kgdb_connect(1);
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#endif
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}
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printf("rebooting\n\n");
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if (what && *what) {
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if (strlen(what) > sizeof str - 5)
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printf("boot string too large, ignored\n");
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else {
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strcpy(str, what);
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ap1 = ap = str + strlen(str);
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*ap++ = ' ';
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}
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}
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*ap++ = '-';
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if (howto & RB_SINGLE)
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*ap++ = 's';
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if (howto & RB_KDB)
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*ap++ = 'd';
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*ap++ = 0;
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if (ap[-2] == '-')
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*ap1 = 0;
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/* flush cache for msgbuf */
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__syncicache((void *)msgbuf_paddr, round_page(MSGBUFSIZE));
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reboot:
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ppc4xx_reset();
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printf("ppc4xx_reset() failed!\n");
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#ifdef DDB
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while(1)
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Debugger();
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#endif
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#ifdef KGDB
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while(1)
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kgdb_connect(1);
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#else
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while (1)
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/* nothing */;
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#endif
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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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