NetBSD-5.0.2/sys/arch/evbppc/explora/machdep.c
/* $NetBSD: machdep.c,v 1.23 2008/08/08 06:29:21 hannken Exp $ */
/*-
* Copyright (c) 2003 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Juergen Hannken-Illjes.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.23 2008/08/08 06:29:21 hannken Exp $");
#include "opt_explora.h"
#include "ksyms.h"
#include <sys/param.h>
#include <sys/buf.h>
#include <sys/msgbuf.h>
#include <sys/kernel.h>
#include <sys/mount.h>
#include <sys/proc.h>
#include <sys/user.h>
#include <sys/reboot.h>
#include <sys/ksyms.h>
#include <uvm/uvm_extern.h>
#include <prop/proplib.h>
#include <machine/explora.h>
#include <machine/bus.h>
#include <machine/powerpc.h>
#include <machine/tlb.h>
#include <machine/trap.h>
#include <powerpc/spr.h>
#include <powerpc/ibm4xx/dcr403cgx.h>
#if NKSYMS || defined(DDB) || defined(LKM)
#include <machine/db_machdep.h>
#include <ddb/db_extern.h>
#endif
#define MEMREGIONS 2
#define TLB_PG_SIZE (16*1024*1024)
char cpu_model[80];
char machine[] = MACHINE; /* from <machine/param.h> */
char machine_arch[] = MACHINE_ARCH; /* from <machine/param.h> */
static const unsigned int cpuspeed = 66000000;
extern struct user *proc0paddr;
prop_dictionary_t board_properties;
struct vm_map *phys_map = NULL;
struct vm_map *mb_map = NULL;
char msgbuf[MSGBUFSIZE];
paddr_t msgbuf_paddr;
static struct mem_region phys_mem[MEMREGIONS];
static struct mem_region avail_mem[MEMREGIONS];
void bootstrap(u_int, u_int);
static void install_extint(void (*)(void));
int lcsplx(int);
/*
* Trap vectors
*/
extern int defaulttrap, defaultsize;
extern int sctrap, scsize;
extern int alitrap, alisize;
extern int dsitrap, dsisize;
extern int isitrap, isisize;
extern int mchktrap, mchksize;
extern int tlbimiss4xx, tlbim4size;
extern int tlbdmiss4xx, tlbdm4size;
extern int pitfitwdog, pitfitwdogsize;
extern int debugtrap, debugsize;
extern int errata51handler, errata51size;
#ifdef DDB
extern int ddblow, ddbsize;
#endif
static struct {
int vector;
void *addr;
void *size;
} trap_table[] = {
{ EXC_SC, &sctrap, &scsize },
{ EXC_ALI, &alitrap, &alisize },
{ EXC_DSI, &dsitrap, &dsisize },
{ EXC_ISI, &isitrap, &isisize },
{ EXC_MCHK, &mchktrap, &mchksize },
{ EXC_ITMISS, &tlbimiss4xx, &tlbim4size },
{ EXC_DTMISS, &tlbdmiss4xx, &tlbdm4size },
{ EXC_PIT, &pitfitwdog, &pitfitwdogsize },
{ EXC_DEBUG, &debugtrap, &debugsize },
{ (EXC_DTMISS|EXC_ALI), &errata51handler, &errata51size },
#if defined(DDB)
{ EXC_PGM, &ddblow, &ddbsize },
#endif /* DDB */
};
/*
* Install a trap vector. We cannot use memcpy because the
* destination may be zero.
*/
static void
trap_copy(void *src, int dest, size_t len)
{
uint32_t *src_p = src;
uint32_t *dest_p = (void *)dest;
while (len > 0) {
*dest_p++ = *src_p++;
len -= sizeof(uint32_t);
}
}
void
bootstrap(u_int startkernel, u_int endkernel)
{
u_int i, j, t, br[4];
u_int maddr, msize, size;
struct cpu_info * const ci = &cpu_info[0];
br[0] = mfdcr(DCR_BR4);
br[1] = mfdcr(DCR_BR5);
br[2] = mfdcr(DCR_BR6);
br[3] = mfdcr(DCR_BR7);
for (i = 0; i < 4; i++)
for (j = i+1; j < 4; j++)
if (br[j] < br[i])
t = br[j], br[j] = br[i], br[i] = t;
for (i = 0, size = 0; i < 4; i++) {
if (((br[i] >> 19) & 3) != 3)
continue;
maddr = ((br[i] >> 24) & 0xff) << 20;
msize = 1 << (20 + ((br[i] >> 21) & 7));
if (maddr+msize > size)
size = maddr+msize;
}
phys_mem[0].start = 0;
phys_mem[0].size = size & ~PGOFSET;
avail_mem[0].start = startkernel;
avail_mem[0].size = size-startkernel;
__asm volatile(
" mtpid %0 \n"
" sync \n"
: : "r" (KERNEL_PID) );
/*
* Setup initial tlbs.
* Kernel memory and console device are
* mapped into the first (reserved) tlbs.
*/
for (maddr = 0; maddr < endkernel; maddr += TLB_PG_SIZE)
ppc4xx_tlb_reserve(maddr, maddr, TLB_PG_SIZE, TLB_EX);
/* Map PCKBC, PCKBC2, COM, LPT. This is far beyond physmem. */
ppc4xx_tlb_reserve(BASE_ISA, BASE_ISA, TLB_PG_SIZE, TLB_I | TLB_G);
#ifndef COM_IS_CONSOLE
ppc4xx_tlb_reserve(BASE_FB, BASE_FB, TLB_PG_SIZE, TLB_I | TLB_G);
ppc4xx_tlb_reserve(BASE_FB2, BASE_FB2, TLB_PG_SIZE, TLB_I | TLB_G);
#endif
consinit();
/* Disable all external interrupts */
mtdcr(DCR_EXIER, 0);
/* Disable all timer interrupts */
mtspr(SPR_TCR, 0);
/* Initialize cache info for memcpy, etc. */
cpu_probe_cache();
/*
* Initialize lwp0 and current pcb and pmap pointers.
*/
lwp0.l_cpu = ci;
lwp0.l_addr = proc0paddr;
memset(lwp0.l_addr, 0, sizeof *lwp0.l_addr);
curpcb = &proc0paddr->u_pcb;
curpcb->pcb_pm = pmap_kernel();
/*
* Install trap vectors.
*/
for (i = EXC_RSVD; i <= EXC_LAST; i += 0x100)
trap_copy(&defaulttrap, i, (size_t)&defaultsize);
for (i = 0; i < sizeof(trap_table)/sizeof(trap_table[0]); i++) {
trap_copy(trap_table[i].addr, trap_table[i].vector,
(size_t)trap_table[i].size);
}
__syncicache((void *)EXC_RST, EXC_LAST - EXC_RST + 0x100);
/*
* Set Exception vector base.
* Handle trap instruction as PGM exception.
*/
mtspr(SPR_EVPR, 0);
t = mfspr(SPR_DBCR0);
t &= ~DBCR0_TDE;
mtspr(SPR_DBCR0, t);
/*
* External interrupt handler install.
*/
install_extint(ext_intr);
/*
* Now enable translation (and machine checks/recoverable interrupts).
*/
__asm volatile (
" mfmsr %0 \n"
" ori %0,%0,%1 \n"
" mtmsr %0 \n"
" sync \n"
: : "r" (0), "K" (PSL_IR|PSL_DR|PSL_ME) );
uvm_setpagesize();
/*
* Initialize pmap module.
*/
pmap_bootstrap(startkernel, endkernel);
#if NKSYMS || defined(DDB) || defined(LKM)
ksyms_init(0, NULL, NULL);
#endif
fake_mapiodev = 0;
}
static void
install_extint(void (*handler)(void))
{
extern int extint, extsize;
extern u_long extint_call;
u_long offset = (u_long)handler - (u_long)&extint_call;
int omsr, msr;
#ifdef DIAGNOSTIC
if (offset > 0x1ffffff)
panic("install_extint: too far away");
#endif
__asm volatile (
" mfmsr %0 \n"
" andi. %1,%0,%2 \n"
" mtmsr %1 \n"
: "=r" (omsr), "=r" (msr) : "K" ((u_short)~PSL_EE) );
extint_call = (extint_call & 0xfc000003) | offset;
memcpy((void *)EXC_EXI, &extint, (size_t)&extsize);
__syncicache((void *)&extint_call, sizeof extint_call);
__syncicache((void *)EXC_EXI, (int)&extsize);
__asm volatile (
" mtmsr %0 \n"
: : "r" (omsr) );
}
void
cpu_startup(void)
{
vaddr_t minaddr, maxaddr;
prop_number_t pn;
char pbuf[9];
/*
* Initialize error message buffer (before start of kernel)
*/
initmsgbuf((void *)msgbuf, round_page(MSGBUFSIZE));
printf("%s%s", copyright, version);
printf("NCD Explora451\n");
format_bytes(pbuf, sizeof(pbuf), ctob(physmem));
printf("total memory = %s\n", pbuf);
minaddr = 0;
/*
* Allocate a submap for physio
*/
phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr,
VM_PHYS_SIZE, 0, false, NULL);
/*
* No need to allocate an mbuf cluster submap. Mbuf clusters
* are allocated via the pool allocator, and we use direct-mapped
* pool pages.
*/
format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free));
printf("avail memory = %s\n", pbuf);
/*
* Set up the board properties database.
*/
board_properties = prop_dictionary_create();
KASSERT(board_properties != NULL);
pn = prop_number_create_integer(ctob(physmem));
KASSERT(pn != NULL);
if (prop_dictionary_set(board_properties, "mem-size", pn) == false)
panic("setting mem-size");
prop_object_release(pn);
pn = prop_number_create_integer(cpuspeed);
KASSERT(pn != NULL);
if (prop_dictionary_set(board_properties, "processor-frequency",
pn) == false)
panic("setting processor-frequency");
prop_object_release(pn);
intr_init();
}
int
lcsplx(int ipl)
{
return spllower(ipl); /*XXX*/
}
void
cpu_reboot(int howto, char *what)
{
static int syncing = 0;
boothowto = howto;
if (!cold && !(howto & RB_NOSYNC) && !syncing) {
syncing = 1;
vfs_shutdown();
resettodr();
}
splhigh();
if (!cold && (howto & RB_DUMP))
/*XXX dumpsys()*/;
doshutdownhooks();
if (howto & RB_HALT) {
printf("halted\n\n");
while (1)
;
}
printf("rebooting\n\n");
/* flush cache for msgbuf */
__syncicache((void *)msgbuf_paddr, round_page(MSGBUFSIZE));
ppc4xx_reset();
#ifdef DDB
while (1)
Debugger();
#else
while (1)
;
#endif
}
void
mem_regions(struct mem_region **mem, struct mem_region **avail)
{
*mem = phys_mem;
*avail = avail_mem;
}