/* $NetBSD: ibm4xx_machdep.c,v 1.39 2024/03/05 14:15:34 thorpej Exp $ */
/* Original: ibm40x_machdep.c,v 1.3 2005/01/17 17:19:36 shige Exp $ */
/*
* Copyright 2001, 2002 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Eduardo Horvath and Simon Burge for Wasabi Systems, Inc.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed for the NetBSD Project by
* Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
* 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.
*/
/*
* Copyright (C) 1995, 1996 Wolfgang Solfrank.
* Copyright (C) 1995, 1996 TooLs GmbH.
* All rights reserved.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by TooLs GmbH.
* 4. The name of TooLs GmbH may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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: ibm4xx_machdep.c,v 1.39 2024/03/05 14:15:34 thorpej Exp $");
#include "ksyms.h"
#ifdef _KERNEL_OPT
#include "opt_ddb.h"
#include "opt_kgdb.h"
#include "opt_modular.h"
#endif
#include <sys/param.h>
#include <sys/cpu.h>
#include <sys/ksyms.h>
#include <sys/mount.h>
#include <sys/msgbuf.h>
#include <sys/pmf.h>
#include <sys/proc.h>
#include <sys/reboot.h>
#include <sys/systm.h>
#include <dev/cons.h>
#include <uvm/uvm_extern.h>
#if defined(DDB)
#include <machine/db_machdep.h>
#include <ddb/db_extern.h>
#endif
#if defined(KGDB)
#include <sys/kgdb.h>
#endif
#include <machine/powerpc.h>
#include <machine/trap.h>
#include <powerpc/pcb.h>
#include <powerpc/spr.h>
#include <powerpc/ibm4xx/cpu.h>
#include <powerpc/ibm4xx/spr.h>
/*
* Global variables used here and there
*/
paddr_t msgbuf_paddr;
vaddr_t msgbuf_vaddr;
char msgbuf[MSGBUFSIZE];
#if NKSYMS || defined(DDB) || defined(MODULAR)
void *startsym, *endsym;
#endif
#ifdef MODULAR
register_t cpu_psluserset = PSL_USERSET;
register_t cpu_pslusermod = PSL_USERMOD;
register_t cpu_pslusermask = PSL_USERMASK;
#endif
/*
* Trap vectors
*/
extern const uint32_t defaulttrap[], defaultsize;
extern const uint32_t sctrap[], scsize;
extern const uint32_t accesstrap[], accesssize;
extern const uint32_t criticaltrap[], criticalsize;
extern const uint32_t tlbimiss4xx[], tlbim4size;
extern const uint32_t tlbdmiss4xx[], tlbdm4size;
extern const uint32_t pitfitwdog[], pitfitwdogsize;
extern const uint32_t errata51handler[], errata51size;
#if defined(DDB)
extern const uint32_t ddblow[], ddbsize;
#endif
static const struct exc_info trap_table[] = {
{ EXC_SC, sctrap, (uintptr_t)&scsize },
{ EXC_ALI, accesstrap, (uintptr_t)&accesssize },
{ EXC_DSI, accesstrap, (uintptr_t)&accesssize },
{ EXC_MCHK, criticaltrap, (uintptr_t)&criticalsize },
{ EXC_ITMISS, tlbimiss4xx, (uintptr_t)&tlbim4size },
{ EXC_DTMISS, tlbdmiss4xx, (uintptr_t)&tlbdm4size },
{ EXC_PIT, pitfitwdog, (uintptr_t)&pitfitwdogsize },
{ EXC_DEBUG, criticaltrap, (uintptr_t)&criticalsize },
{ (EXC_DTMISS|EXC_ALI),
errata51handler, (uintptr_t)&errata51size },
#if defined(DDB)
{ EXC_PGM, ddblow, (uintptr_t)&ddbsize },
#else
{ EXC_PGM, accesstrap, (uintptr_t)&accesssize },
#endif
};
void
cpu_reboot(int howto, char *what)
{
static int syncing;
static char str[256];
char *ap = str, *ap1 = ap;
boothowto = howto;
if (!cold && !(howto & RB_NOSYNC) && !syncing) {
syncing = 1;
vfs_shutdown(); /* sync */
}
splhigh();
if (!cold && (howto & RB_DUMP))
ibm4xx_dumpsys();
doshutdownhooks();
pmf_system_shutdown(boothowto);
if ((howto & RB_POWERDOWN) == RB_POWERDOWN) {
/* Power off here if we know how... */
}
if (howto & RB_HALT) {
printf("The operating system has halted.\n"
"Press any key to reboot.\n\n");
cnpollc(1);
cngetc();
cnpollc(0);
}
printf("rebooting...\n\n");
if (what && *what) {
if (strlen(what) > sizeof(str) - 5)
printf("boot string too large, ignored\n");
else {
strcpy(str, what);
ap1 = ap = str + strlen(str);
*ap++ = ' ';
}
}
*ap++ = '-';
if (howto & RB_SINGLE)
*ap++ = 's';
if (howto & RB_KDB)
*ap++ = 'd';
*ap++ = '\0';
if (ap[-2] == '-')
*ap1 = '\0';
/* flush cache for msgbuf */
__syncicache((void *)msgbuf_paddr, round_page(MSGBUFSIZE));
ppc4xx_reset();
printf("ppc4xx_reset() failed!\n");
for (;;) {
#if defined(DDB)
Debugger();
#elif defined(KGDB)
kgdb_connect(1);
#else
continue;
#endif
}
}
/*
* Install a trap vector. We cannot use memcpy because the
* destination may be zero.
*/
static void
trap_copy(const uint32_t *src, vaddr_t dest, size_t len)
{
uint32_t *dest_p = (void *)dest;
while (len > 0) {
*dest_p++ = *src++;
len -= sizeof(uint32_t);
}
}
/*
* ibm4xx_init:
*/
void
ibm4xx_init(vaddr_t startkernel, vaddr_t endkernel, void (*handler)(void))
{
/* Initialize cache info for memcpy, etc. */
cpu_probe_cache();
/*
* Initialize current pcb and pmap pointers.
*/
KASSERT(curcpu() == &cpu_info[0]);
KASSERT(lwp0.l_cpu == curcpu());
KASSERT(curlwp == &lwp0);
curpcb = lwp_getpcb(curlwp);
memset(curpcb, 0, sizeof(struct pcb));
curpcb->pcb_pm = pmap_kernel();
for (uintptr_t exc = EXC_RSVD; exc <= EXC_LAST; exc += 0x100) {
trap_copy(defaulttrap, exc, (uintptr_t)&defaultsize);
}
for (size_t i = 0; i < __arraycount(trap_table); i++) {
KASSERT(trap_table[i].exc_size <= 0x100);
trap_copy(trap_table[i].exc_addr, trap_table[i].exc_vector,
trap_table[i].exc_size);
}
__syncicache((void *)EXC_RST, EXC_LAST - EXC_RST + 0x100);
mtspr(SPR_EVPR, 0); /* Set Exception vector base */
/* Handle trap instruction as PGM exception */
mtspr(SPR_DBCR0, mfspr(SPR_DBCR0) & ~DBCR0_TDE);
/*
* external interrupt handler install
*/
if (handler)
ibm4xx_install_extint(handler);
/*
* Now enable translation (and machine checks/recoverable interrupts).
*/
__asm volatile ("mfmsr %0; ori %0,%0,%1; mtmsr %0; isync"
: : "r" (0), "K" (PSL_IR|PSL_DR));
/* XXXX PSL_ME - With ME set kernel gets stuck... */
/*
* turn on console after enable translation
*/
consinit();
uvm_md_init();
/*
* Initialize pmap module.
*/
pmap_bootstrap(startkernel, endkernel);
/*
* Let's take all the indirect calls via our stubs and patch
* them to be direct calls.
*/
cpu_fixup_stubs();
#if NKSYMS || defined(DDB) || defined(MODULAR)
ksyms_addsyms_elf((uintptr_t)endsym - (uintptr_t)startsym,
startsym, endsym);
#endif
}
void
ibm4xx_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 msr;
#ifdef DIAGNOSTIC
if (offset > 0x1ffffff)
panic("install_extint: too far away");
#endif
__asm volatile ("mfmsr %0; wrteei 0" : "=r" (msr));
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" :: "r" (msr));
}
/*
* ibm4xx_cpu_startup:
* Machine dependent startup code.
*/
void
ibm4xx_cpu_startup(const char *model)
{
vaddr_t minaddr, maxaddr;
char pbuf[9];
KASSERT(curcpu() != NULL);
KASSERT(lwp0.l_cpu != NULL);
KASSERT(curcpu()->ci_intstk != 0);
KASSERT(curcpu()->ci_idepth == -1);
/*
* Initialize error message buffer (at end of core).
*/
#if 0 /* For some reason this fails... --Artem
* Besides, do we really have to put it at the end of core?
* Let's use static buffer for now
*/
if (!(msgbuf_vaddr = uvm_km_alloc(kernel_map, round_page(MSGBUFSIZE),
0, UVM_KMF_VAONLY)))
panic("startup: no room for message buffer");
for (i = 0; i < btoc(MSGBUFSIZE); i++)
pmap_kenter_pa(msgbuf_vaddr + i * PAGE_SIZE,
msgbuf_paddr + i * PAGE_SIZE,
VM_PROT_READ|VM_PROT_WRITE, 0);
initmsgbuf((void *)msgbuf_vaddr, round_page(MSGBUFSIZE));
#else
initmsgbuf((void *)msgbuf, round_page(MSGBUFSIZE));
#endif
printf("%s%s", copyright, version);
if (model != NULL)
printf("Model: %s\n", model);
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(uvm_availmem(false)));
printf("avail memory = %s\n", pbuf);
}
/*
* ibm4xx_dumpsys:
* Crash dump handling.
*/
void
ibm4xx_dumpsys(void)
{
printf("dumpsys: TBD\n");
}
