NetBSD-5.0.2/sys/arch/sun3/sun3x/machdep.c
/* $NetBSD: machdep.c,v 1.111.6.1 2009/02/02 03:30:34 snj Exp $ */
/*
* Copyright (c) 1982, 1986, 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department.
*
* 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. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*
* from: Utah Hdr: machdep.c 1.74 92/12/20
* from: @(#)machdep.c 8.10 (Berkeley) 4/20/94
*/
/*
* Copyright (c) 1988 University of Utah.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department.
*
* 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 the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*
* from: Utah Hdr: machdep.c 1.74 92/12/20
* from: @(#)machdep.c 8.10 (Berkeley) 4/20/94
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.111.6.1 2009/02/02 03:30:34 snj Exp $");
#include "opt_ddb.h"
#include "opt_kgdb.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/buf.h>
#include <sys/reboot.h>
#include <sys/conf.h>
#include <sys/file.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/msgbuf.h>
#include <sys/ioctl.h>
#include <sys/tty.h>
#include <sys/mount.h>
#include <sys/user.h>
#include <sys/exec.h>
#include <sys/core.h>
#include <sys/kcore.h>
#include <sys/vnode.h>
#include <sys/syscallargs.h>
#include <sys/ksyms.h>
#ifdef KGDB
#include <sys/kgdb.h>
#endif
#include <uvm/uvm_extern.h>
#include <sys/sysctl.h>
#include <dev/cons.h>
#include <machine/cpu.h>
#include <machine/dvma.h>
#include <machine/idprom.h>
#include <machine/kcore.h>
#include <machine/reg.h>
#include <machine/psl.h>
#include <machine/pte.h>
#if defined(DDB)
#include <machine/db_machdep.h>
#include <ddb/db_sym.h>
#include <ddb/db_extern.h>
#endif
#include <sun3/sun3/machdep.h>
#include "ksyms.h"
/* Defined in locore.s */
extern char kernel_text[];
/* Defined by the linker */
extern char etext[];
/* Our exported CPU info; we can have only one. */
struct cpu_info cpu_info_store;
struct vm_map *mb_map = NULL;
struct vm_map *phys_map = NULL;
int physmem;
int fputype;
void * msgbufaddr;
/* Virtual page frame for /dev/mem (see mem.c) */
vaddr_t vmmap;
/*
* safepri is a safe priority for sleep to set for a spin-wait
* during autoconfiguration or after a panic.
*/
int safepri = PSL_LOWIPL;
u_char cpu_machine_id = 0;
const char *cpu_string = NULL;
int cpu_has_vme = 0;
int has_iocache = 0;
vaddr_t dumppage;
static void identifycpu(void);
static void initcpu(void);
/*
* Console initialization: called early on from main,
* before vm init or cpu_startup. This system is able
* to use the console for output immediately (via PROM)
* but can not use it for input until after this point.
*/
void
consinit(void)
{
/*
* Switch from the PROM console (output only)
* to our own console driver.
*/
cninit();
#if NKSYMS || defined(DDB) || defined(LKM)
{
extern int nsym;
extern char *ssym, *esym;
ksyms_init(nsym, ssym, esym);
}
#endif /* DDB */
/*
* Now that the console can do input as well as
* output, consider stopping for a debugger.
*/
if (boothowto & RB_KDB) {
#ifdef KGDB
/* XXX - Ask on console for kgdb_dev? */
/* Note: this will just return if kgdb_dev==NODEV */
kgdb_connect(1);
#else /* KGDB */
/* Either DDB or no debugger (just PROM). */
Debugger();
#endif /* KGDB */
}
}
/*
* cpu_startup: allocate memory for variable-sized tables,
* initialize CPU, and do autoconfiguration.
*
* This is called early in init_main.c:main(), after the
* kernel memory allocator is ready for use, but before
* the creation of processes 1,2, and mountroot, etc.
*/
void
cpu_startup(void)
{
char *v;
vaddr_t minaddr, maxaddr;
char pbuf[9];
/*
* Initialize message buffer (for kernel printf).
* This is put in physical page zero so it will
* always be in the same place after a reboot.
* Its mapping was prepared in pmap_bootstrap().
* Also, offset some to avoid PROM scribbles.
*/
v = (char *)KERNBASE;
msgbufaddr = v + MSGBUFOFF;
initmsgbuf(msgbufaddr, MSGBUFSIZE);
/*
* Good {morning,afternoon,evening,night}.
*/
printf("%s%s", copyright, version);
identifycpu();
initfpu(); /* also prints FPU type */
format_bytes(pbuf, sizeof(pbuf), ctob(physmem));
printf("total memory = %s\n", pbuf);
/*
* Get scratch page for dumpsys().
*/
dumppage = uvm_km_alloc(kernel_map, PAGE_SIZE, 0, UVM_KMF_WIRED);
if (dumppage == 0)
panic("startup: alloc dumppage");
minaddr = 0;
/*
* Allocate a submap for physio
*/
phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr,
VM_PHYS_SIZE, 0, false, NULL);
/*
* Finally, allocate mbuf cluster submap.
*/
mb_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr,
nmbclusters * mclbytes, VM_MAP_INTRSAFE,
false, NULL);
format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free));
printf("avail memory = %s\n", pbuf);
/*
* Allocate a virtual page (for use by /dev/mem)
* This page is handed to pmap_enter() therefore
* it has to be in the normal kernel VA range.
*/
vmmap = uvm_km_alloc(kernel_map, PAGE_SIZE, 0,
UVM_KMF_VAONLY | UVM_KMF_WAITVA);
/*
* Create the DVMA maps.
*/
dvma_init();
/*
* Set up CPU-specific registers, cache, etc.
*/
initcpu();
}
/*
* Set registers on exec.
*/
void
setregs(struct lwp *l, struct exec_package *pack, u_long stack)
{
struct trapframe *tf = (struct trapframe *)l->l_md.md_regs;
tf->tf_sr = PSL_USERSET;
tf->tf_pc = pack->ep_entry & ~1;
tf->tf_regs[D0] = 0;
tf->tf_regs[D1] = 0;
tf->tf_regs[D2] = 0;
tf->tf_regs[D3] = 0;
tf->tf_regs[D4] = 0;
tf->tf_regs[D5] = 0;
tf->tf_regs[D6] = 0;
tf->tf_regs[D7] = 0;
tf->tf_regs[A0] = 0;
tf->tf_regs[A1] = 0;
tf->tf_regs[A2] = (int)l->l_proc->p_psstr;
tf->tf_regs[A3] = 0;
tf->tf_regs[A4] = 0;
tf->tf_regs[A5] = 0;
tf->tf_regs[A6] = 0;
tf->tf_regs[SP] = stack;
/* restore a null state frame */
l->l_addr->u_pcb.pcb_fpregs.fpf_null = 0;
if (fputype)
m68881_restore(&l->l_addr->u_pcb.pcb_fpregs);
l->l_md.md_flags = 0;
}
/*
* Info for CTL_HW
*/
char machine[16] = MACHINE; /* from <machine/param.h> */
char kernel_arch[16] = "sun3x"; /* XXX needs a sysctl node */
char cpu_model[120];
/*
* XXX - Should empirically estimate the divisor...
* Note that the value of delay_divisor is roughly
* 2048 / cpuclock (where cpuclock is in MHz).
*/
int delay_divisor = 62; /* assume the fastest (33 MHz) */
void
identifycpu(void)
{
u_char machtype;
machtype = identity_prom.idp_machtype;
if ((machtype & IDM_ARCH_MASK) != IDM_ARCH_SUN3X) {
printf("Bad IDPROM arch!\n");
sunmon_abort();
}
cpu_machine_id = machtype;
switch (cpu_machine_id) {
case ID_SUN3X_80:
cpu_string = "80"; /* Hydra */
delay_divisor = 102; /* 20 MHz */
cpu_has_vme = false;
break;
case ID_SUN3X_470:
cpu_string = "470"; /* Pegasus */
delay_divisor = 62; /* 33 MHz */
cpu_has_vme = true;
break;
default:
printf("unknown sun3x model\n");
sunmon_abort();
}
/* Other stuff? (VAC, mc6888x version, etc.) */
/* Note: miniroot cares about the kernel_arch part. */
sprintf(cpu_model, "%s %s", kernel_arch, cpu_string);
printf("Model: %s\n", cpu_model);
}
/*
* machine dependent system variables.
*/
#if 0 /* XXX - Not yet... */
static int
sysctl_machdep_root_device(SYSCTLFN_ARGS)
{
struct sysctlnode node = *rnode;
node.sysctl_data = some permutation on root_device;
node.sysctl_size = strlen(root_device) + 1;
return (sysctl_lookup(SYSCTLFN_CALL(&node)));
}
static int
sysctl_machdep_booted_kernel(SYSCTLFN_ARGS)
{
struct sysctlnode node = *rnode;
node.sysctl_data = some permutation on booted_kernel;
node.sysctl_size = strlen(booted_kernel) + 1;
return (sysctl_lookup(SYSCTLFN_CALL(&node)));
}
#endif
SYSCTL_SETUP(sysctl_machdep_setup, "sysctl machdep subtree setup")
{
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT,
CTLTYPE_NODE, "machdep", NULL,
NULL, 0, NULL, 0,
CTL_MACHDEP, CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT,
CTLTYPE_STRUCT, "console_device", NULL,
sysctl_consdev, 0, NULL, sizeof(dev_t),
CTL_MACHDEP, CPU_CONSDEV, CTL_EOL);
#if 0 /* XXX - Not yet... */
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT,
CTLTYPE_STRING, "root_device", NULL,
sysctl_machdep_root_device, 0, NULL, 0,
CTL_MACHDEP, CPU_ROOT_DEVICE, CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT,
CTLTYPE_STRING, "booted_kernel", NULL,
sysctl_machdep_booted_kernel, 0, NULL, 0,
CTL_MACHDEP, CPU_BOOTED_KERNEL, CTL_EOL);
#endif
}
/* See: sig_machdep.c */
/*
* Do a sync in preparation for a reboot.
* XXX - This could probably be common code.
* XXX - And now, most of it is in vfs_shutdown()
* XXX - Put waittime checks in there too?
*/
int waittime = -1; /* XXX - Who else looks at this? -gwr */
static void
reboot_sync(void)
{
/* Check waittime here to localize its use to this function. */
if (waittime >= 0)
return;
waittime = 0;
vfs_shutdown();
}
/*
* Common part of the BSD and SunOS reboot system calls.
*/
__dead void
cpu_reboot(int howto, char *user_boot_string)
{
/* Note: this string MUST be static! */
static char bootstr[128];
char *p;
/* If system is cold, just halt. (early panic?) */
if (cold)
goto haltsys;
/* Un-blank the screen if appropriate. */
cnpollc(1);
if ((howto & RB_NOSYNC) == 0) {
reboot_sync();
/*
* If we've been adjusting the clock, the todr
* will be out of synch; adjust it now.
*
* XXX - However, if the kernel has been sitting in ddb,
* the time will be way off, so don't set the HW clock!
* XXX - Should do sanity check against HW clock. -gwr
*/
/* resettodr(); */
}
/* Disable interrupts. */
splhigh();
/* Write out a crash dump if asked. */
if (howto & RB_DUMP)
dumpsys();
/* run any shutdown hooks */
doshutdownhooks();
if (howto & RB_HALT) {
haltsys:
printf("halted.\n");
sunmon_halt();
}
/*
* Automatic reboot.
*/
if (user_boot_string)
strncpy(bootstr, user_boot_string, sizeof(bootstr));
else {
/*
* Build our own boot string with an empty
* boot device/file and (maybe) some flags.
* The PROM will supply the device/file name.
*/
p = bootstr;
*p = '\0';
if (howto & (RB_KDB|RB_ASKNAME|RB_SINGLE)) {
/* Append the boot flags. */
*p++ = ' ';
*p++ = '-';
if (howto & RB_KDB)
*p++ = 'd';
if (howto & RB_ASKNAME)
*p++ = 'a';
if (howto & RB_SINGLE)
*p++ = 's';
*p = '\0';
}
}
printf("rebooting...\n");
sunmon_reboot(bootstr);
for (;;) ;
/*NOTREACHED*/
}
/*
* These variables are needed by /sbin/savecore
*/
uint32_t dumpmag = 0x8fca0101; /* magic number */
int dumpsize = 0; /* pages */
long dumplo = 0; /* blocks */
#define DUMP_EXTRA 1 /* CPU-dependent extra pages */
/*
* This is called by main to set dumplo, dumpsize.
* Dumps always skip the first PAGE_SIZE of disk space
* in case there might be a disk label stored there.
* If there is extra space, put dump at the end to
* reduce the chance that swapping trashes it.
*/
void
cpu_dumpconf(void)
{
const struct bdevsw *bdev;
int devblks; /* size of dump device in blocks */
int dumpblks; /* size of dump image in blocks */
int (*getsize)(dev_t);
if (dumpdev == NODEV)
return;
bdev = bdevsw_lookup(dumpdev);
if (bdev == NULL) {
dumpdev = NODEV;
return;
}
getsize = bdev->d_psize;
if (getsize == NULL)
return;
devblks = (*getsize)(dumpdev);
if (devblks <= ctod(1))
return;
devblks &= ~(ctod(1) - 1);
/*
* Note: savecore expects dumpsize to be the
* number of pages AFTER the dump header.
*/
dumpsize = physmem; /* pages */
/* Position dump image near end of space, page aligned. */
dumpblks = ctod(physmem + DUMP_EXTRA);
dumplo = devblks - dumpblks;
/* If it does not fit, truncate it by moving dumplo. */
/* Note: Must force signed comparison. */
if (dumplo < ((long)ctod(1))) {
dumplo = ctod(1);
dumpsize = dtoc(devblks - dumplo) - DUMP_EXTRA;
}
}
/* Note: gdb looks for "dumppcb" in a kernel crash dump. */
struct pcb dumppcb;
/*
* Write a crash dump. The format while in swap is:
* kcore_seg_t cpu_hdr;
* cpu_kcore_hdr_t cpu_data;
* padding (PAGE_SIZE-sizeof(kcore_seg_t))
* pagemap (2*PAGE_SIZE)
* physical memory...
*/
void
dumpsys(void)
{
const struct bdevsw *dsw;
kcore_seg_t *kseg_p;
cpu_kcore_hdr_t *chdr_p;
struct sun3x_kcore_hdr *sh;
phys_ram_seg_t *crs_p;
char *vaddr;
paddr_t paddr;
int psize, todo, seg, segsz;
daddr_t blkno;
int error = 0;
if (dumpdev == NODEV)
return;
dsw = bdevsw_lookup(dumpdev);
if (dsw == NULL || dsw->d_psize == NULL)
return;
/*
* For dumps during autoconfiguration,
* if dump device has already configured...
*/
if (dumpsize == 0)
cpu_dumpconf();
if (dumplo <= 0) {
printf("\ndump to dev %u,%u not possible\n", major(dumpdev),
minor(dumpdev));
return;
}
savectx(&dumppcb);
psize = (*(dsw->d_psize))(dumpdev);
if (psize == -1) {
printf("dump area unavailable\n");
return;
}
printf("\ndumping to dev %u,%u offset %ld\n", major(dumpdev),
minor(dumpdev), dumplo);
/*
* Prepare the dump header
*/
blkno = dumplo;
todo = dumpsize; /* pages */
vaddr = (char *)dumppage;
memset(vaddr, 0, PAGE_SIZE);
/* Set pointers to all three parts. */
kseg_p = (kcore_seg_t *)vaddr;
chdr_p = (cpu_kcore_hdr_t *)(kseg_p + 1);
sh = &chdr_p->un._sun3x;
/* Fill in kcore_seg_t part. */
CORE_SETMAGIC(*kseg_p, KCORE_MAGIC, MID_MACHINE, CORE_CPU);
kseg_p->c_size = (ctob(DUMP_EXTRA) - sizeof(*kseg_p));
/* Fill in cpu_kcore_hdr_t part. */
strncpy(chdr_p->name, kernel_arch, sizeof(chdr_p->name));
chdr_p->page_size = PAGE_SIZE;
chdr_p->kernbase = KERNBASE;
/* Fill in the sun3x_kcore_hdr part. */
pmap_kcore_hdr(sh);
/* Write out the dump header. */
error = (*dsw->d_dump)(dumpdev, blkno, vaddr, PAGE_SIZE);
if (error)
goto fail;
blkno += btodb(PAGE_SIZE);
/*
* Now dump physical memory. Note that physical memory
* might NOT be congiguous, so do it by segments.
*/
vaddr = (char *)vmmap; /* Borrow /dev/mem VA */
for (seg = 0; seg < SUN3X_NPHYS_RAM_SEGS; seg++) {
crs_p = &sh->ram_segs[seg];
paddr = crs_p->start;
segsz = crs_p->size;
while (todo && (segsz > 0)) {
/* Print pages left after every 16. */
if ((todo & 0xf) == 0)
printf_nolog("\r%4d", todo);
/* Make a temporary mapping for the page. */
pmap_kenter_pa(vmmap, paddr | PMAP_NC, VM_PROT_READ);
pmap_update(pmap_kernel());
error = (*dsw->d_dump)(dumpdev, blkno, vaddr,
PAGE_SIZE);
pmap_kremove(vmmap, PAGE_SIZE);
pmap_update(pmap_kernel());
if (error)
goto fail;
paddr += PAGE_SIZE;
segsz -= PAGE_SIZE;
blkno += btodb(PAGE_SIZE);
todo--;
}
}
printf("\rdump succeeded\n");
return;
fail:
printf(" dump error=%d\n", error);
}
static void
initcpu(void)
{
/* XXX: Enable RAM parity/ECC checking? */
/* XXX: parityenable(); */
#ifdef HAVECACHE
cache_enable();
#endif
}
/* straptrap() in trap.c */
/* from hp300: badaddr() */
/* peek_byte(), peek_word() moved to bus_subr.c */
/* XXX: parityenable() ? */
/* regdump() moved to regdump.c */
/*
* cpu_exec_aout_makecmds():
* CPU-dependent a.out format hook for execve().
*
* Determine if the given exec package refers to something which we
* understand and, if so, set up the vmcmds for it.
*/
int
cpu_exec_aout_makecmds(struct lwp *l, struct exec_package *epp)
{
return ENOEXEC;
}