/* $OpenBSD: machdep.c,v 1.110 2007/06/06 17:15:11 deraadt Exp $ */
/* $NetBSD: machdep.c,v 1.210 2000/06/01 17:12:38 thorpej Exp $ */
/*-
* Copyright (c) 1998, 1999 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
* NASA Ames Research Center and by Chris G. Demetriou.
*
* 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 NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation 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 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.
*/
/*
* Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Chris G. Demetriou
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/signalvar.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/sched.h>
#include <sys/buf.h>
#include <sys/reboot.h>
#include <sys/device.h>
#include <sys/conf.h>
#include <sys/file.h>
#include <sys/timeout.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/msgbuf.h>
#include <sys/ioctl.h>
#include <sys/tty.h>
#include <sys/user.h>
#include <sys/exec.h>
#include <sys/exec_ecoff.h>
#include <uvm/uvm_extern.h>
#include <sys/sysctl.h>
#include <sys/core.h>
#include <sys/kcore.h>
#include <machine/kcore.h>
#ifndef NO_IEEE
#include <machine/fpu.h>
#endif
#ifdef SYSVMSG
#include <sys/msg.h>
#endif
#include <sys/timetc.h>
#include <sys/mount.h>
#include <sys/syscallargs.h>
#include <dev/cons.h>
#include <machine/autoconf.h>
#include <machine/cpu.h>
#include <machine/reg.h>
#include <machine/rpb.h>
#include <machine/prom.h>
#include <machine/cpuconf.h>
#ifndef NO_IEEE
#include <machine/ieeefp.h>
#endif
#include <dev/pci/pcivar.h>
#ifdef DDB
#include <machine/db_machdep.h>
#include <ddb/db_access.h>
#include <ddb/db_sym.h>
#include <ddb/db_extern.h>
#endif
int cpu_dump(void);
int cpu_dumpsize(void);
u_long cpu_dump_mempagecnt(void);
void dumpsys(void);
caddr_t allocsys(caddr_t);
void identifycpu(void);
void regdump(struct trapframe *framep);
void printregs(struct reg *);
/*
* Declare these as initialized data so we can patch them.
*/
#ifndef BUFCACHEPERCENT
#define BUFCACHEPERCENT 10
#endif
#ifdef BUFPAGES
int bufpages = BUFPAGES;
#else
int bufpages = 0;
#endif
int bufcachepercent = BUFCACHEPERCENT;
struct vm_map *exec_map = NULL;
struct vm_map *phys_map = NULL;
#ifdef APERTURE
#ifdef INSECURE
int allowaperture = 1;
#else
int allowaperture = 0;
#endif
#endif
int totalphysmem; /* total amount of physical memory in system */
int physmem; /* physical mem used by OpenBSD + some rsvd */
int resvmem; /* amount of memory reserved for PROM */
int unusedmem; /* amount of memory for OS that we don't use */
int unknownmem; /* amount of memory with an unknown use */
int cputype; /* system type, from the RPB */
int alpha_cpus;
int bootdev_debug = 0; /* patchable, or from DDB */
/* the following is used externally (sysctl_hw) */
char machine[] = MACHINE; /* from <machine/param.h> */
char cpu_model[128];
char root_device[17];
struct user *proc0paddr;
/* Number of machine cycles per microsecond */
u_int64_t cycles_per_usec;
struct bootinfo_kernel bootinfo;
/* For built-in TCDS */
#if defined(DEC_3000_300) || defined(DEC_3000_500)
u_int8_t dec_3000_scsiid[2], dec_3000_scsifast[2];
#endif
struct platform platform;
/* for cpu_sysctl() */
int alpha_unaligned_print = 1; /* warn about unaligned accesses */
int alpha_unaligned_fix = 1; /* fix up unaligned accesses */
int alpha_unaligned_sigbus = 1; /* SIGBUS on fixed-up accesses */
#ifndef NO_IEEE
int alpha_fp_sync_complete = 0; /* fp fixup if sync even without /s */
#endif
/* used by hw_sysctl */
extern char *hw_serial;
/*
* XXX This should be dynamically sized, but we have the chicken-egg problem!
* XXX it should also be larger than it is, because not all of the mddt
* XXX clusters end up being used for VM.
*/
phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX]; /* low size bits overloaded */
int mem_cluster_cnt;
void
alpha_init(pfn, ptb, bim, bip, biv)
u_long pfn; /* first free PFN number */
u_long ptb; /* PFN of current level 1 page table */
u_long bim; /* bootinfo magic */
u_long bip; /* bootinfo pointer */
u_long biv; /* bootinfo version */
{
extern char kernel_text[], _end[];
struct mddt *mddtp;
struct mddt_cluster *memc;
int i, mddtweird;
struct vm_physseg *vps;
vaddr_t kernstart, kernend;
paddr_t kernstartpfn, kernendpfn, pfn0, pfn1;
vsize_t size;
char *p;
caddr_t v;
const char *bootinfo_msg;
const struct cpuinit *c;
extern caddr_t esym;
struct cpu_info *ci;
cpuid_t cpu_id;
/* NO OUTPUT ALLOWED UNTIL FURTHER NOTICE */
/*
* Turn off interrupts (not mchecks) and floating point.
* Make sure the instruction and data streams are consistent.
*/
(void)alpha_pal_swpipl(ALPHA_PSL_IPL_HIGH);
alpha_pal_wrfen(0);
ALPHA_TBIA();
alpha_pal_imb();
/* Initialize the SCB. */
scb_init();
cpu_id = cpu_number();
#if defined(MULTIPROCESSOR)
/*
* Set our SysValue to the address of our cpu_info structure.
* Secondary processors do this in their spinup trampoline.
*/
alpha_pal_wrval((u_long)&cpu_info[cpu_id]);
#endif
ci = curcpu();
ci->ci_cpuid = cpu_id;
/*
* Get critical system information (if possible, from the
* information provided by the boot program).
*/
bootinfo_msg = NULL;
if (bim == BOOTINFO_MAGIC) {
if (biv == 0) { /* backward compat */
biv = *(u_long *)bip;
bip += 8;
}
switch (biv) {
case 1: {
struct bootinfo_v1 *v1p = (struct bootinfo_v1 *)bip;
bootinfo.ssym = v1p->ssym;
bootinfo.esym = v1p->esym;
/* hwrpb may not be provided by boot block in v1 */
if (v1p->hwrpb != NULL) {
bootinfo.hwrpb_phys =
((struct rpb *)v1p->hwrpb)->rpb_phys;
bootinfo.hwrpb_size = v1p->hwrpbsize;
} else {
bootinfo.hwrpb_phys =
((struct rpb *)HWRPB_ADDR)->rpb_phys;
bootinfo.hwrpb_size =
((struct rpb *)HWRPB_ADDR)->rpb_size;
}
bcopy(v1p->boot_flags, bootinfo.boot_flags,
min(sizeof v1p->boot_flags,
sizeof bootinfo.boot_flags));
bcopy(v1p->booted_kernel, bootinfo.booted_kernel,
min(sizeof v1p->booted_kernel,
sizeof bootinfo.booted_kernel));
/* booted dev not provided in bootinfo */
init_prom_interface((struct rpb *)
ALPHA_PHYS_TO_K0SEG(bootinfo.hwrpb_phys));
prom_getenv(PROM_E_BOOTED_DEV, bootinfo.booted_dev,
sizeof bootinfo.booted_dev);
break;
}
default:
bootinfo_msg = "unknown bootinfo version";
goto nobootinfo;
}
} else {
bootinfo_msg = "boot program did not pass bootinfo";
nobootinfo:
bootinfo.ssym = (u_long)_end;
bootinfo.esym = (u_long)_end;
bootinfo.hwrpb_phys = ((struct rpb *)HWRPB_ADDR)->rpb_phys;
bootinfo.hwrpb_size = ((struct rpb *)HWRPB_ADDR)->rpb_size;
init_prom_interface((struct rpb *)HWRPB_ADDR);
prom_getenv(PROM_E_BOOTED_OSFLAGS, bootinfo.boot_flags,
sizeof bootinfo.boot_flags);
prom_getenv(PROM_E_BOOTED_FILE, bootinfo.booted_kernel,
sizeof bootinfo.booted_kernel);
prom_getenv(PROM_E_BOOTED_DEV, bootinfo.booted_dev,
sizeof bootinfo.booted_dev);
}
esym = (caddr_t)bootinfo.esym;
/*
* Initialize the kernel's mapping of the RPB. It's needed for
* lots of things.
*/
hwrpb = (struct rpb *)ALPHA_PHYS_TO_K0SEG(bootinfo.hwrpb_phys);
#if defined(DEC_3000_300) || defined(DEC_3000_500)
if (hwrpb->rpb_type == ST_DEC_3000_300 ||
hwrpb->rpb_type == ST_DEC_3000_500) {
prom_getenv(PROM_E_SCSIID, dec_3000_scsiid,
sizeof(dec_3000_scsiid));
prom_getenv(PROM_E_SCSIFAST, dec_3000_scsifast,
sizeof(dec_3000_scsifast));
}
#endif
/*
* Remember how many cycles there are per microsecond,
* so that we can use delay(). Round up, for safety.
*/
cycles_per_usec = (hwrpb->rpb_cc_freq + 999999) / 1000000;
/*
* Initialize the (temporary) bootstrap console interface, so
* we can use printf until the VM system starts being setup.
* The real console is initialized before then.
*/
init_bootstrap_console();
/* OUTPUT NOW ALLOWED */
/* delayed from above */
if (bootinfo_msg)
printf("WARNING: %s (0x%lx, 0x%lx, 0x%lx)\n",
bootinfo_msg, bim, bip, biv);
/* Initialize the trap vectors on the primary processor. */
trap_init();
/*
* Find out what hardware we're on, and do basic initialization.
*/
cputype = hwrpb->rpb_type;
if (cputype < 0) {
/*
* At least some white-box systems have SRM which
* reports a systype that's the negative of their
* blue-box counterpart.
*/
cputype = -cputype;
}
c = platform_lookup(cputype);
if (c == NULL) {
platform_not_supported();
/* NOTREACHED */
}
(*c->init)();
strlcpy(cpu_model, platform.model, sizeof cpu_model);
/*
* Initialize the real console, so that the bootstrap console is
* no longer necessary.
*/
(*platform.cons_init)();
#if 0
/* Paranoid sanity checking */
assert(hwrpb->rpb_primary_cpu_id == alpha_pal_whami());
/*
* On single-CPU systypes, the primary should always be CPU 0,
* except on Alpha 8200 systems where the CPU id is related
* to the VID, which is related to the Turbo Laser node id.
*/
if (cputype != ST_DEC_21000)
assert(hwrpb->rpb_primary_cpu_id == 0);
#endif
/* NO MORE FIRMWARE ACCESS ALLOWED */
#ifdef _PMAP_MAY_USE_PROM_CONSOLE
/*
* XXX (unless _PMAP_MAY_USE_PROM_CONSOLE is defined and
* XXX pmap_uses_prom_console() evaluates to non-zero.)
*/
#endif
#ifndef SMALL_KERNEL
/*
* If we run on a BWX-capable processor, override cpu_switch
* with a faster version.
* We do this now because the kernel text might be mapped
* read-only eventually (although this is not the case at the moment).
*/
if (alpha_implver() >= ALPHA_IMPLVER_EV5) {
if (~alpha_amask(ALPHA_AMASK_BWX) != 0) {
extern vaddr_t __bwx_switch0, __bwx_switch1,
__bwx_switch2, __bwx_switch3;
u_int32_t *dst, *src, *end;
src = (u_int32_t *)&__bwx_switch2;
end = (u_int32_t *)&__bwx_switch3;
dst = (u_int32_t *)&__bwx_switch0;
while (src != end)
*dst++ = *src++;
src = (u_int32_t *)&__bwx_switch1;
end = (u_int32_t *)&__bwx_switch2;
while (src != end)
*dst++ = *src++;
}
}
#endif
/*
* find out this system's page size
*/
if ((uvmexp.pagesize = hwrpb->rpb_page_size) != 8192)
panic("page size %d != 8192?!", uvmexp.pagesize);
uvm_setpagesize();
/*
* Find the beginning and end of the kernel (and leave a
* bit of space before the beginning for the bootstrap
* stack).
*/
kernstart = trunc_page((vaddr_t)kernel_text) - 2 * PAGE_SIZE;
kernend = (vaddr_t)round_page((vaddr_t)bootinfo.esym);
kernstartpfn = atop(ALPHA_K0SEG_TO_PHYS(kernstart));
kernendpfn = atop(ALPHA_K0SEG_TO_PHYS(kernend));
/*
* Find out how much memory is available, by looking at
* the memory cluster descriptors. This also tries to do
* its best to detect things things that have never been seen
* before...
*/
mddtp = (struct mddt *)(((caddr_t)hwrpb) + hwrpb->rpb_memdat_off);
/* MDDT SANITY CHECKING */
mddtweird = 0;
if (mddtp->mddt_cluster_cnt < 2) {
mddtweird = 1;
printf("WARNING: weird number of mem clusters: %lu\n",
mddtp->mddt_cluster_cnt);
}
#if 0
printf("Memory cluster count: %d\n", mddtp->mddt_cluster_cnt);
#endif
for (i = 0; i < mddtp->mddt_cluster_cnt; i++) {
memc = &mddtp->mddt_clusters[i];
#if 0
printf("MEMC %d: pfn 0x%lx cnt 0x%lx usage 0x%lx\n", i,
memc->mddt_pfn, memc->mddt_pg_cnt, memc->mddt_usage);
#endif
totalphysmem += memc->mddt_pg_cnt;
if (mem_cluster_cnt < VM_PHYSSEG_MAX) { /* XXX */
mem_clusters[mem_cluster_cnt].start =
ptoa(memc->mddt_pfn);
mem_clusters[mem_cluster_cnt].size =
ptoa(memc->mddt_pg_cnt);
if (memc->mddt_usage & MDDT_mbz ||
memc->mddt_usage & MDDT_NONVOLATILE || /* XXX */
memc->mddt_usage & MDDT_PALCODE)
mem_clusters[mem_cluster_cnt].size |=
VM_PROT_READ;
else
mem_clusters[mem_cluster_cnt].size |=
VM_PROT_READ | VM_PROT_WRITE | VM_PROT_EXECUTE;
mem_cluster_cnt++;
} /* XXX else print something! */
if (memc->mddt_usage & MDDT_mbz) {
mddtweird = 1;
printf("WARNING: mem cluster %d has weird "
"usage 0x%lx\n", i, memc->mddt_usage);
unknownmem += memc->mddt_pg_cnt;
continue;
}
if (memc->mddt_usage & MDDT_NONVOLATILE) {
/* XXX should handle these... */
printf("WARNING: skipping non-volatile mem "
"cluster %d\n", i);
unusedmem += memc->mddt_pg_cnt;
continue;
}
if (memc->mddt_usage & MDDT_PALCODE) {
resvmem += memc->mddt_pg_cnt;
continue;
}
/*
* We have a memory cluster available for system
* software use. We must determine if this cluster
* holds the kernel.
*/
#ifdef _PMAP_MAY_USE_PROM_CONSOLE
/*
* XXX If the kernel uses the PROM console, we only use the
* XXX memory after the kernel in the first system segment,
* XXX to avoid clobbering prom mapping, data, etc.
*/
if (!pmap_uses_prom_console() || physmem == 0) {
#endif /* _PMAP_MAY_USE_PROM_CONSOLE */
physmem += memc->mddt_pg_cnt;
pfn0 = memc->mddt_pfn;
pfn1 = memc->mddt_pfn + memc->mddt_pg_cnt;
if (pfn0 <= kernstartpfn && kernendpfn <= pfn1) {
/*
* Must compute the location of the kernel
* within the segment.
*/
#if 0
printf("Cluster %d contains kernel\n", i);
#endif
#ifdef _PMAP_MAY_USE_PROM_CONSOLE
if (!pmap_uses_prom_console()) {
#endif /* _PMAP_MAY_USE_PROM_CONSOLE */
if (pfn0 < kernstartpfn) {
/*
* There is a chunk before the kernel.
*/
#if 0
printf("Loading chunk before kernel: "
"0x%lx / 0x%lx\n", pfn0, kernstartpfn);
#endif
uvm_page_physload(pfn0, kernstartpfn,
pfn0, kernstartpfn, VM_FREELIST_DEFAULT);
}
#ifdef _PMAP_MAY_USE_PROM_CONSOLE
}
#endif /* _PMAP_MAY_USE_PROM_CONSOLE */
if (kernendpfn < pfn1) {
/*
* There is a chunk after the kernel.
*/
#if 0
printf("Loading chunk after kernel: "
"0x%lx / 0x%lx\n", kernendpfn, pfn1);
#endif
uvm_page_physload(kernendpfn, pfn1,
kernendpfn, pfn1, VM_FREELIST_DEFAULT);
}
} else {
/*
* Just load this cluster as one chunk.
*/
#if 0
printf("Loading cluster %d: 0x%lx / 0x%lx\n", i,
pfn0, pfn1);
#endif
uvm_page_physload(pfn0, pfn1, pfn0, pfn1,
VM_FREELIST_DEFAULT);
}
#ifdef _PMAP_MAY_USE_PROM_CONSOLE
}
#endif /* _PMAP_MAY_USE_PROM_CONSOLE */
}
#ifdef DEBUG
/*
* Dump out the MDDT if it looks odd...
*/
if (mddtweird) {
printf("\n");
printf("complete memory cluster information:\n");
for (i = 0; i < mddtp->mddt_cluster_cnt; i++) {
printf("mddt %d:\n", i);
printf("\tpfn %lx\n",
mddtp->mddt_clusters[i].mddt_pfn);
printf("\tcnt %lx\n",
mddtp->mddt_clusters[i].mddt_pg_cnt);
printf("\ttest %lx\n",
mddtp->mddt_clusters[i].mddt_pg_test);
printf("\tbva %lx\n",
mddtp->mddt_clusters[i].mddt_v_bitaddr);
printf("\tbpa %lx\n",
mddtp->mddt_clusters[i].mddt_p_bitaddr);
printf("\tbcksum %lx\n",
mddtp->mddt_clusters[i].mddt_bit_cksum);
printf("\tusage %lx\n",
mddtp->mddt_clusters[i].mddt_usage);
}
printf("\n");
}
#endif
if (totalphysmem == 0)
panic("can't happen: system seems to have no memory!");
#if 0
printf("totalphysmem = %u\n", totalphysmem);
printf("physmem = %u\n", physmem);
printf("resvmem = %d\n", resvmem);
printf("unusedmem = %d\n", unusedmem);
printf("unknownmem = %d\n", unknownmem);
#endif
/*
* Initialize error message buffer (at end of core).
*/
{
vsize_t sz = (vsize_t)round_page(MSGBUFSIZE);
vsize_t reqsz = sz;
vps = &vm_physmem[vm_nphysseg - 1];
/* shrink so that it'll fit in the last segment */
if ((vps->avail_end - vps->avail_start) < atop(sz))
sz = ptoa(vps->avail_end - vps->avail_start);
vps->end -= atop(sz);
vps->avail_end -= atop(sz);
initmsgbuf((caddr_t) ALPHA_PHYS_TO_K0SEG(ptoa(vps->end)), sz);
/* Remove the last segment if it now has no pages. */
if (vps->start == vps->end)
vm_nphysseg--;
/* warn if the message buffer had to be shrunk */
if (sz != reqsz)
printf("WARNING: %ld bytes not available for msgbuf "
"in last cluster (%ld used)\n", reqsz, sz);
}
/*
* Init mapping for u page(s) for proc 0
*/
proc0.p_addr = proc0paddr =
(struct user *)pmap_steal_memory(UPAGES * PAGE_SIZE, NULL, NULL);
/*
* Allocate space for system data structures. These data structures
* are allocated here instead of cpu_startup() because physical
* memory is directly addressable. We don't have to map these into
* virtual address space.
*/
size = (vsize_t)allocsys(NULL);
v = (caddr_t)pmap_steal_memory(size, NULL, NULL);
if ((allocsys(v) - v) != size)
panic("alpha_init: table size inconsistency");
/*
* Clear allocated memory.
*/
bzero(v, size);
/*
* Initialize the virtual memory system, and set the
* page table base register in proc 0's PCB.
*/
pmap_bootstrap(ALPHA_PHYS_TO_K0SEG(ptb << PGSHIFT),
hwrpb->rpb_max_asn, hwrpb->rpb_pcs_cnt);
/*
* Initialize the rest of proc 0's PCB, and cache its physical
* address.
*/
proc0.p_md.md_pcbpaddr =
(struct pcb *)ALPHA_K0SEG_TO_PHYS((vaddr_t)&proc0paddr->u_pcb);
/*
* Set the kernel sp, reserving space for an (empty) trapframe,
* and make proc0's trapframe pointer point to it for sanity.
*/
proc0paddr->u_pcb.pcb_hw.apcb_ksp =
(u_int64_t)proc0paddr + USPACE - sizeof(struct trapframe);
proc0.p_md.md_tf =
(struct trapframe *)proc0paddr->u_pcb.pcb_hw.apcb_ksp;
/*
* Initialize the primary CPU's idle PCB to proc0's. In a
* MULTIPROCESSOR configuration, each CPU will later get
* its own idle PCB when autoconfiguration runs.
*/
ci->ci_idle_pcb = &proc0paddr->u_pcb;
ci->ci_idle_pcb_paddr = (u_long)proc0.p_md.md_pcbpaddr;
/*
* Look at arguments passed to us and compute boothowto.
*/
#ifdef KADB
boothowto |= RB_KDB;
#endif
for (p = bootinfo.boot_flags; p && *p != '\0'; p++) {
/*
* Note that we'd really like to differentiate case here,
* but the Alpha AXP Architecture Reference Manual
* says that we shouldn't.
*/
switch (*p) {
case 'a': /* Ignore */
case 'A':
break;
case 'b': /* Enter DDB as soon as the console is initialised */
case 'B':
boothowto |= RB_KDB;
break;
case 'c': /* enter user kernel configuration */
case 'C':
boothowto |= RB_CONFIG;
break;
#ifdef DEBUG
case 'd': /* crash dump immediately after autoconfig */
case 'D':
boothowto |= RB_DUMP;
break;
#endif
case 'h': /* always halt, never reboot */
case 'H':
boothowto |= RB_HALT;
break;
#if 0
case 'm': /* mini root present in memory */
case 'M':
boothowto |= RB_MINIROOT;
break;
#endif
case 'n': /* askname */
case 'N':
boothowto |= RB_ASKNAME;
break;
case 's': /* single-user */
case 'S':
boothowto |= RB_SINGLE;
break;
case '-':
/*
* Just ignore this. It's not required, but it's
* common for it to be passed regardless.
*/
break;
default:
printf("Unrecognized boot flag '%c'.\n", *p);
break;
}
}
/*
* Figure out the number of cpus in the box, from RPB fields.
* Really. We mean it.
*/
for (alpha_cpus = 0, i = 0; i < hwrpb->rpb_pcs_cnt; i++) {
struct pcs *pcsp;
pcsp = LOCATE_PCS(hwrpb, i);
if ((pcsp->pcs_flags & PCS_PP) != 0)
alpha_cpus++;
}
/*
* Initialize debuggers, and break into them if appropriate.
*/
#ifdef DDB
ddb_init();
if (boothowto & RB_KDB)
Debugger();
#endif
#ifdef KGDB
if (boothowto & RB_KDB)
kgdb_connect(0);
#endif
/*
* Figure out our clock frequency, from RPB fields.
*/
hz = hwrpb->rpb_intr_freq >> 12;
if (!(60 <= hz && hz <= 10240)) {
hz = 1024;
#ifdef DIAGNOSTIC
printf("WARNING: unbelievable rpb_intr_freq: %ld (%d hz)\n",
hwrpb->rpb_intr_freq, hz);
#endif
}
}
caddr_t
allocsys(v)
caddr_t v;
{
/*
* Allocate space for system data structures.
* The first available kernel virtual address is in "v".
* As pages of kernel virtual memory are allocated, "v" is incremented.
*
* These data structures are allocated here instead of cpu_startup()
* because physical memory is directly addressable. We don't have
* to map these into virtual address space.
*/
#define valloc(name, type, num) \
(name) = (type *)v; v = (caddr_t)ALIGN((name)+(num))
#ifdef SYSVMSG
valloc(msgpool, char, msginfo.msgmax);
valloc(msgmaps, struct msgmap, msginfo.msgseg);
valloc(msghdrs, struct msg, msginfo.msgtql);
valloc(msqids, struct msqid_ds, msginfo.msgmni);
#endif
#undef valloc
return v;
}
void
consinit()
{
/*
* Everything related to console initialization is done
* in alpha_init().
*/
#if defined(DIAGNOSTIC) && defined(_PMAP_MAY_USE_PROM_CONSOLE)
printf("consinit: %susing prom console\n",
pmap_uses_prom_console() ? "" : "not ");
#endif
}
void
cpu_startup()
{
vaddr_t minaddr, maxaddr;
#if defined(DEBUG)
extern int pmapdebug;
int opmapdebug = pmapdebug;
pmapdebug = 0;
#endif
/*
* Good {morning,afternoon,evening,night}.
*/
printf(version);
identifycpu();
printf("total memory = %ld (%ldK)\n", ptoa((u_long)totalphysmem),
ptoa((u_long)totalphysmem) / 1024);
printf("(%ld reserved for PROM, ", ptoa((u_long)resvmem));
printf("%ld used by OpenBSD)\n", ptoa((u_long)physmem));
if (unusedmem) {
printf("WARNING: unused memory = %ld (%ldK)\n",
ptoa((u_long)unusedmem), ptoa((u_long)unusedmem) / 1024);
}
if (unknownmem) {
printf("WARNING: %ld (%ldK) of memory with unknown purpose\n",
ptoa((u_long)unknownmem), ptoa((u_long)unknownmem) / 1024);
}
/*
* Determine how many buffers to allocate.
* We allocate bufcachepercent% of memory for buffer space.
*/
if (bufpages == 0)
bufpages = physmem * bufcachepercent / 100;
/*
* Allocate a submap for exec arguments. This map effectively
* limits the number of processes exec'ing at any time.
*/
minaddr = vm_map_min(kernel_map);
exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr,
16 * NCARGS, VM_MAP_PAGEABLE, FALSE, NULL);
/*
* Allocate a submap for physio
*/
phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr,
VM_PHYS_SIZE, 0, FALSE, NULL);
#if defined(DEBUG)
pmapdebug = opmapdebug;
#endif
printf("avail memory = %ld (%ldK)\n", (long)ptoa(uvmexp.free),
(long)ptoa(uvmexp.free) / 1024);
#if 0
{
extern u_long pmap_pages_stolen;
printf("stolen memory for VM structures = %d\n", pmap_pages_stolen * PAGE_SIZE);
}
#endif
/*
* Set up buffers, so they can be used to read disk labels.
*/
bufinit();
/*
* Configure the system.
*/
if (boothowto & RB_CONFIG) {
#ifdef BOOT_CONFIG
user_config();
#else
printf("kernel does not support -c; continuing..\n");
#endif
}
/*
* Set up the HWPCB so that it's safe to configure secondary
* CPUs.
*/
hwrpb_primary_init();
}
/*
* Retrieve the platform name from the DSR.
*/
const char *
alpha_dsr_sysname()
{
struct dsrdb *dsr;
const char *sysname;
/*
* DSR does not exist on early HWRPB versions.
*/
if (hwrpb->rpb_version < HWRPB_DSRDB_MINVERS)
return (NULL);
dsr = (struct dsrdb *)(((caddr_t)hwrpb) + hwrpb->rpb_dsrdb_off);
sysname = (const char *)((caddr_t)dsr + (dsr->dsr_sysname_off +
sizeof(u_int64_t)));
return (sysname);
}
/*
* Lookup the system specified system variation in the provided table,
* returning the model string on match.
*/
const char *
alpha_variation_name(variation, avtp)
u_int64_t variation;
const struct alpha_variation_table *avtp;
{
int i;
for (i = 0; avtp[i].avt_model != NULL; i++)
if (avtp[i].avt_variation == variation)
return (avtp[i].avt_model);
return (NULL);
}
/*
* Generate a default platform name based for unknown system variations.
*/
const char *
alpha_unknown_sysname()
{
static char s[128]; /* safe size */
snprintf(s, sizeof s, "%s family, unknown model variation 0x%lx",
platform.family, hwrpb->rpb_variation & SV_ST_MASK);
return ((const char *)s);
}
void
identifycpu()
{
char *s;
int slen;
/*
* print out CPU identification information.
*/
printf("%s", cpu_model);
for(s = cpu_model; *s; ++s)
if(strncasecmp(s, "MHz", 3) == 0)
goto skipMHz;
printf(", %ldMHz", hwrpb->rpb_cc_freq / 1000000);
skipMHz:
/* fill in hw_serial if a serial number is known */
slen = strlen(hwrpb->rpb_ssn) + 1;
if (slen > 1) {
hw_serial = malloc(slen, M_SYSCTL, M_NOWAIT);
if (hw_serial)
strlcpy(hw_serial, (char *)hwrpb->rpb_ssn, slen);
}
printf("\n");
printf("%ld byte page size, %d processor%s.\n",
hwrpb->rpb_page_size, alpha_cpus, alpha_cpus == 1 ? "" : "s");
#if 0
/* this is not particularly useful! */
printf("variation: 0x%lx, revision 0x%lx\n",
hwrpb->rpb_variation, *(long *)hwrpb->rpb_revision);
#endif
}
int waittime = -1;
struct pcb dumppcb;
void
boot(howto)
int howto;
{
#if defined(MULTIPROCESSOR)
#if 0 /* XXX See below. */
u_long cpu_id;
#endif
#endif
#if defined(MULTIPROCESSOR)
/* We must be running on the primary CPU. */
if (alpha_pal_whami() != hwrpb->rpb_primary_cpu_id)
panic("cpu_reboot: not on primary CPU!");
#endif
/* If system is cold, just halt. */
if (cold) {
/* (Unless the user explicitly asked for reboot.) */
if ((howto & RB_USERREQ) == 0)
howto |= RB_HALT;
goto haltsys;
}
/* If "always halt" was specified as a boot flag, obey. */
if ((boothowto & RB_HALT) != 0)
howto |= RB_HALT;
boothowto = howto;
if ((howto & RB_NOSYNC) == 0 && waittime < 0) {
waittime = 0;
vfs_shutdown();
/*
* If we've been adjusting the clock, the todr
* will be out of synch; adjust it now unless
* the system has been sitting in ddb.
*/
if ((howto & RB_TIMEBAD) == 0) {
resettodr();
} else {
printf("WARNING: not updating battery clock\n");
}
}
/* Disable interrupts. */
splhigh();
/* If rebooting and a dump is requested do it. */
if (howto & RB_DUMP)
dumpsys();
haltsys:
/* run any shutdown hooks */
doshutdownhooks();
#if defined(MULTIPROCESSOR)
#if 0 /* XXX doesn't work when called from here?! */
/* Kill off any secondary CPUs. */
for (cpu_id = 0; cpu_id < hwrpb->rpb_pcs_cnt; cpu_id++) {
if (cpu_id == hwrpb->rpb_primary_cpu_id ||
cpu_info[cpu_id].ci_softc == NULL)
continue;
cpu_halt_secondary(cpu_id);
}
#endif
#endif
#ifdef BOOTKEY
printf("hit any key to %s...\n", howto & RB_HALT ? "halt" : "reboot");
cnpollc(1); /* for proper keyboard command handling */
cngetc();
cnpollc(0);
printf("\n");
#endif
/* Finally, powerdown/halt/reboot the system. */
if ((howto & RB_POWERDOWN) == RB_POWERDOWN &&
platform.powerdown != NULL) {
(*platform.powerdown)();
printf("WARNING: powerdown failed!\n");
}
printf("%s\n\n", howto & RB_HALT ? "halted." : "rebooting...");
prom_halt(howto & RB_HALT);
/*NOTREACHED*/
}
/*
* These variables are needed by /sbin/savecore
*/
u_long dumpmag = 0x8fca0101; /* magic number */
int dumpsize = 0; /* pages */
long dumplo = 0; /* blocks */
/*
* cpu_dumpsize: calculate size of machine-dependent kernel core dump headers.
*/
int
cpu_dumpsize()
{
int size;
size = ALIGN(sizeof(kcore_seg_t)) + ALIGN(sizeof(cpu_kcore_hdr_t)) +
ALIGN(mem_cluster_cnt * sizeof(phys_ram_seg_t));
if (roundup(size, dbtob(1)) != dbtob(1))
return -1;
return (1);
}
/*
* cpu_dump_mempagecnt: calculate size of RAM (in pages) to be dumped.
*/
u_long
cpu_dump_mempagecnt()
{
u_long i, n;
n = 0;
for (i = 0; i < mem_cluster_cnt; i++)
n += atop(mem_clusters[i].size);
return (n);
}
/*
* cpu_dump: dump machine-dependent kernel core dump headers.
*/
int
cpu_dump()
{
int (*dump)(dev_t, daddr64_t, caddr_t, size_t);
char buf[dbtob(1)];
kcore_seg_t *segp;
cpu_kcore_hdr_t *cpuhdrp;
phys_ram_seg_t *memsegp;
int i;
dump = bdevsw[major(dumpdev)].d_dump;
bzero(buf, sizeof buf);
segp = (kcore_seg_t *)buf;
cpuhdrp = (cpu_kcore_hdr_t *)&buf[ALIGN(sizeof(*segp))];
memsegp = (phys_ram_seg_t *)&buf[ALIGN(sizeof(*segp)) +
ALIGN(sizeof(*cpuhdrp))];
/*
* Generate a segment header.
*/
CORE_SETMAGIC(*segp, KCORE_MAGIC, MID_MACHINE, CORE_CPU);
segp->c_size = dbtob(1) - ALIGN(sizeof(*segp));
/*
* Add the machine-dependent header info.
*/
cpuhdrp->lev1map_pa = ALPHA_K0SEG_TO_PHYS((vaddr_t)kernel_lev1map);
cpuhdrp->page_size = PAGE_SIZE;
cpuhdrp->nmemsegs = mem_cluster_cnt;
/*
* Fill in the memory segment descriptors.
*/
for (i = 0; i < mem_cluster_cnt; i++) {
memsegp[i].start = mem_clusters[i].start;
memsegp[i].size = mem_clusters[i].size & ~PAGE_MASK;
}
return (dump(dumpdev, dumplo, (caddr_t)buf, dbtob(1)));
}
/*
* This is called by main to set dumplo and 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
dumpconf(void)
{
int nblks, dumpblks; /* size of dump area */
if (dumpdev == NODEV ||
(nblks = (bdevsw[major(dumpdev)].d_psize)(dumpdev)) == 0)
return;
if (nblks <= ctod(1))
return;
dumpblks = cpu_dumpsize();
if (dumpblks < 0)
return;
dumpblks += ctod(cpu_dump_mempagecnt());
/* If dump won't fit (incl. room for possible label), punt. */
if (dumpblks > (nblks - ctod(1)))
return;
/* Put dump at end of partition */
dumplo = nblks - dumpblks;
/* dumpsize is in page units, and doesn't include headers. */
dumpsize = cpu_dump_mempagecnt();
}
/*
* Dump the kernel's image to the swap partition.
*/
#define BYTES_PER_DUMP PAGE_SIZE
void
dumpsys()
{
u_long totalbytesleft, bytes, i, n, memcl;
u_long maddr;
int psize;
daddr64_t blkno;
int (*dump)(dev_t, daddr64_t, caddr_t, size_t);
int error;
extern int msgbufmapped;
/* Save registers. */
savectx(&dumppcb);
msgbufmapped = 0; /* don't record dump msgs in msgbuf */
if (dumpdev == NODEV)
return;
/*
* For dumps during autoconfiguration,
* if dump device has already configured...
*/
if (dumpsize == 0)
dumpconf();
if (dumplo <= 0) {
printf("\ndump to dev %u,%u not possible\n", major(dumpdev),
minor(dumpdev));
return;
}
printf("\ndumping to dev %u,%u offset %ld\n", major(dumpdev),
minor(dumpdev), dumplo);
psize = (*bdevsw[major(dumpdev)].d_psize)(dumpdev);
printf("dump ");
if (psize == -1) {
printf("area unavailable\n");
return;
}
/* XXX should purge all outstanding keystrokes. */
if ((error = cpu_dump()) != 0)
goto err;
totalbytesleft = ptoa(cpu_dump_mempagecnt());
blkno = dumplo + cpu_dumpsize();
dump = bdevsw[major(dumpdev)].d_dump;
error = 0;
for (memcl = 0; memcl < mem_cluster_cnt; memcl++) {
maddr = mem_clusters[memcl].start;
bytes = mem_clusters[memcl].size & ~PAGE_MASK;
for (i = 0; i < bytes; i += n, totalbytesleft -= n) {
/* Print out how many MBs we to go. */
if ((totalbytesleft % (1024*1024)) == 0)
printf("%ld ", totalbytesleft / (1024 * 1024));
/* Limit size for next transfer. */
n = bytes - i;
if (n > BYTES_PER_DUMP)
n = BYTES_PER_DUMP;
error = (*dump)(dumpdev, blkno,
(caddr_t)ALPHA_PHYS_TO_K0SEG(maddr), n);
if (error)
goto err;
maddr += n;
blkno += btodb(n); /* XXX? */
/* XXX should look for keystrokes, to cancel. */
}
}
err:
switch (error) {
#ifdef DEBUG
case ENXIO:
printf("device bad\n");
break;
case EFAULT:
printf("device not ready\n");
break;
case EINVAL:
printf("area improper\n");
break;
case EIO:
printf("i/o error\n");
break;
case EINTR:
printf("aborted from console\n");
break;
#endif /* DEBUG */
case 0:
printf("succeeded\n");
break;
default:
printf("error %d\n", error);
break;
}
printf("\n\n");
delay(1000);
}
void
frametoreg(framep, regp)
struct trapframe *framep;
struct reg *regp;
{
regp->r_regs[R_V0] = framep->tf_regs[FRAME_V0];
regp->r_regs[R_T0] = framep->tf_regs[FRAME_T0];
regp->r_regs[R_T1] = framep->tf_regs[FRAME_T1];
regp->r_regs[R_T2] = framep->tf_regs[FRAME_T2];
regp->r_regs[R_T3] = framep->tf_regs[FRAME_T3];
regp->r_regs[R_T4] = framep->tf_regs[FRAME_T4];
regp->r_regs[R_T5] = framep->tf_regs[FRAME_T5];
regp->r_regs[R_T6] = framep->tf_regs[FRAME_T6];
regp->r_regs[R_T7] = framep->tf_regs[FRAME_T7];
regp->r_regs[R_S0] = framep->tf_regs[FRAME_S0];
regp->r_regs[R_S1] = framep->tf_regs[FRAME_S1];
regp->r_regs[R_S2] = framep->tf_regs[FRAME_S2];
regp->r_regs[R_S3] = framep->tf_regs[FRAME_S3];
regp->r_regs[R_S4] = framep->tf_regs[FRAME_S4];
regp->r_regs[R_S5] = framep->tf_regs[FRAME_S5];
regp->r_regs[R_S6] = framep->tf_regs[FRAME_S6];
regp->r_regs[R_A0] = framep->tf_regs[FRAME_A0];
regp->r_regs[R_A1] = framep->tf_regs[FRAME_A1];
regp->r_regs[R_A2] = framep->tf_regs[FRAME_A2];
regp->r_regs[R_A3] = framep->tf_regs[FRAME_A3];
regp->r_regs[R_A4] = framep->tf_regs[FRAME_A4];
regp->r_regs[R_A5] = framep->tf_regs[FRAME_A5];
regp->r_regs[R_T8] = framep->tf_regs[FRAME_T8];
regp->r_regs[R_T9] = framep->tf_regs[FRAME_T9];
regp->r_regs[R_T10] = framep->tf_regs[FRAME_T10];
regp->r_regs[R_T11] = framep->tf_regs[FRAME_T11];
regp->r_regs[R_RA] = framep->tf_regs[FRAME_RA];
regp->r_regs[R_T12] = framep->tf_regs[FRAME_T12];
regp->r_regs[R_AT] = framep->tf_regs[FRAME_AT];
regp->r_regs[R_GP] = framep->tf_regs[FRAME_GP];
/* regp->r_regs[R_SP] = framep->tf_regs[FRAME_SP]; XXX */
regp->r_regs[R_ZERO] = 0;
}
void
regtoframe(regp, framep)
struct reg *regp;
struct trapframe *framep;
{
framep->tf_regs[FRAME_V0] = regp->r_regs[R_V0];
framep->tf_regs[FRAME_T0] = regp->r_regs[R_T0];
framep->tf_regs[FRAME_T1] = regp->r_regs[R_T1];
framep->tf_regs[FRAME_T2] = regp->r_regs[R_T2];
framep->tf_regs[FRAME_T3] = regp->r_regs[R_T3];
framep->tf_regs[FRAME_T4] = regp->r_regs[R_T4];
framep->tf_regs[FRAME_T5] = regp->r_regs[R_T5];
framep->tf_regs[FRAME_T6] = regp->r_regs[R_T6];
framep->tf_regs[FRAME_T7] = regp->r_regs[R_T7];
framep->tf_regs[FRAME_S0] = regp->r_regs[R_S0];
framep->tf_regs[FRAME_S1] = regp->r_regs[R_S1];
framep->tf_regs[FRAME_S2] = regp->r_regs[R_S2];
framep->tf_regs[FRAME_S3] = regp->r_regs[R_S3];
framep->tf_regs[FRAME_S4] = regp->r_regs[R_S4];
framep->tf_regs[FRAME_S5] = regp->r_regs[R_S5];
framep->tf_regs[FRAME_S6] = regp->r_regs[R_S6];
framep->tf_regs[FRAME_A0] = regp->r_regs[R_A0];
framep->tf_regs[FRAME_A1] = regp->r_regs[R_A1];
framep->tf_regs[FRAME_A2] = regp->r_regs[R_A2];
framep->tf_regs[FRAME_A3] = regp->r_regs[R_A3];
framep->tf_regs[FRAME_A4] = regp->r_regs[R_A4];
framep->tf_regs[FRAME_A5] = regp->r_regs[R_A5];
framep->tf_regs[FRAME_T8] = regp->r_regs[R_T8];
framep->tf_regs[FRAME_T9] = regp->r_regs[R_T9];
framep->tf_regs[FRAME_T10] = regp->r_regs[R_T10];
framep->tf_regs[FRAME_T11] = regp->r_regs[R_T11];
framep->tf_regs[FRAME_RA] = regp->r_regs[R_RA];
framep->tf_regs[FRAME_T12] = regp->r_regs[R_T12];
framep->tf_regs[FRAME_AT] = regp->r_regs[R_AT];
framep->tf_regs[FRAME_GP] = regp->r_regs[R_GP];
/* framep->tf_regs[FRAME_SP] = regp->r_regs[R_SP]; XXX */
/* ??? = regp->r_regs[R_ZERO]; */
}
void
printregs(regp)
struct reg *regp;
{
int i;
for (i = 0; i < 32; i++)
printf("R%d:\t0x%016lx%s", i, regp->r_regs[i],
i & 1 ? "\n" : "\t");
}
void
regdump(framep)
struct trapframe *framep;
{
struct reg reg;
frametoreg(framep, ®);
reg.r_regs[R_SP] = alpha_pal_rdusp();
printf("REGISTERS:\n");
printregs(®);
}
#ifdef DEBUG
int sigdebug = 0;
int sigpid = 0;
#define SDB_FOLLOW 0x01
#define SDB_KSTACK 0x02
#endif
/*
* Send an interrupt to process.
*/
void
sendsig(catcher, sig, mask, code, type, val)
sig_t catcher;
int sig, mask;
u_long code;
int type;
union sigval val;
{
struct proc *p = curproc;
struct sigcontext *scp, ksc;
struct trapframe *frame;
struct sigacts *psp = p->p_sigacts;
int oonstack, fsize, rndfsize, kscsize;
siginfo_t *sip, ksi;
frame = p->p_md.md_tf;
oonstack = psp->ps_sigstk.ss_flags & SS_ONSTACK;
fsize = sizeof ksc;
rndfsize = ((fsize + 15) / 16) * 16;
kscsize = rndfsize;
if (psp->ps_siginfo & sigmask(sig)) {
fsize += sizeof ksi;
rndfsize = ((fsize + 15) / 16) * 16;
}
/*
* Allocate and validate space for the signal handler
* context. Note that if the stack is in P0 space, the
* call to uvm_grow() is a nop, and the useracc() check
* will fail if the process has not already allocated
* the space with a `brk'.
*/
if ((psp->ps_flags & SAS_ALTSTACK) && !oonstack &&
(psp->ps_sigonstack & sigmask(sig))) {
scp = (struct sigcontext *)(psp->ps_sigstk.ss_sp +
psp->ps_sigstk.ss_size - rndfsize);
psp->ps_sigstk.ss_flags |= SS_ONSTACK;
} else
scp = (struct sigcontext *)(alpha_pal_rdusp() - rndfsize);
if ((u_long)scp <= USRSTACK - ctob(p->p_vmspace->vm_ssize))
(void)uvm_grow(p, (u_long)scp);
#ifdef DEBUG
if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid)
printf("sendsig(%d): sig %d ssp %p usp %p\n", p->p_pid,
sig, &oonstack, scp);
#endif
/*
* Build the signal context to be used by sigreturn.
*/
ksc.sc_onstack = oonstack;
ksc.sc_mask = mask;
ksc.sc_pc = frame->tf_regs[FRAME_PC];
ksc.sc_ps = frame->tf_regs[FRAME_PS];
/* copy the registers. */
frametoreg(frame, (struct reg *)ksc.sc_regs);
ksc.sc_regs[R_ZERO] = 0xACEDBADE; /* magic number */
ksc.sc_regs[R_SP] = alpha_pal_rdusp();
/* save the floating-point state, if necessary, then copy it. */
if (p->p_addr->u_pcb.pcb_fpcpu != NULL)
fpusave_proc(p, 1);
ksc.sc_ownedfp = p->p_md.md_flags & MDP_FPUSED;
memcpy((struct fpreg *)ksc.sc_fpregs, &p->p_addr->u_pcb.pcb_fp,
sizeof(struct fpreg));
#ifndef NO_IEEE
ksc.sc_fp_control = alpha_read_fp_c(p);
#else
ksc.sc_fp_control = 0;
#endif
memset(ksc.sc_reserved, 0, sizeof ksc.sc_reserved); /* XXX */
memset(ksc.sc_xxx, 0, sizeof ksc.sc_xxx); /* XXX */
#ifdef COMPAT_OSF1
/*
* XXX Create an OSF/1-style sigcontext and associated goo.
*/
#endif
if (psp->ps_siginfo & sigmask(sig)) {
initsiginfo(&ksi, sig, code, type, val);
sip = (void *)scp + kscsize;
if (copyout((caddr_t)&ksi, (caddr_t)sip, fsize - kscsize) != 0)
goto trash;
} else
sip = NULL;
/*
* copy the frame out to userland.
*/
if (copyout((caddr_t)&ksc, (caddr_t)scp, kscsize) != 0) {
trash:
#ifdef DEBUG
if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid)
printf("sendsig(%d): copyout failed on sig %d\n",
p->p_pid, sig);
#endif
/*
* Process has trashed its stack; give it an illegal
* instruction to halt it in its tracks.
*/
sigexit(p, SIGILL);
/* NOTREACHED */
}
#ifdef DEBUG
if (sigdebug & SDB_FOLLOW)
printf("sendsig(%d): sig %d scp %p code %lx\n", p->p_pid, sig,
scp, code);
#endif
/*
* Set up the registers to return to sigcode.
*/
frame->tf_regs[FRAME_PC] = p->p_sigcode;
frame->tf_regs[FRAME_A0] = sig;
frame->tf_regs[FRAME_A1] = (u_int64_t)sip;
frame->tf_regs[FRAME_A2] = (u_int64_t)scp;
frame->tf_regs[FRAME_T12] = (u_int64_t)catcher; /* t12 is pv */
alpha_pal_wrusp((unsigned long)scp);
#ifdef DEBUG
if (sigdebug & SDB_FOLLOW)
printf("sendsig(%d): pc %lx, catcher %lx\n", p->p_pid,
frame->tf_regs[FRAME_PC], frame->tf_regs[FRAME_A3]);
if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid)
printf("sendsig(%d): sig %d returns\n",
p->p_pid, sig);
#endif
}
/*
* System call to cleanup state after a signal
* has been taken. Reset signal mask and
* stack state from context left by sendsig (above).
* Return to previous pc and psl as specified by
* context left by sendsig. Check carefully to
* make sure that the user has not modified the
* psl to gain improper privileges or to cause
* a machine fault.
*/
/* ARGSUSED */
int
sys_sigreturn(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct sys_sigreturn_args /* {
syscallarg(struct sigcontext *) sigcntxp;
} */ *uap = v;
struct sigcontext ksc;
#ifdef DEBUG
struct sigcontext *scp;
#endif
int error;
#ifdef DEBUG
if (sigdebug & SDB_FOLLOW)
printf("sigreturn: pid %d, scp %p\n", p->p_pid, scp);
#endif
/*
* Test and fetch the context structure.
* We grab it all at once for speed.
*/
if ((error = copyin(SCARG(uap, sigcntxp), &ksc, sizeof(ksc))) != 0)
return (error);
if (ksc.sc_regs[R_ZERO] != 0xACEDBADE) /* magic number */
return (EINVAL);
/*
* Restore the user-supplied information
*/
if (ksc.sc_onstack)
p->p_sigacts->ps_sigstk.ss_flags |= SS_ONSTACK;
else
p->p_sigacts->ps_sigstk.ss_flags &= ~SS_ONSTACK;
p->p_sigmask = ksc.sc_mask &~ sigcantmask;
p->p_md.md_tf->tf_regs[FRAME_PC] = ksc.sc_pc;
p->p_md.md_tf->tf_regs[FRAME_PS] =
(ksc.sc_ps | ALPHA_PSL_USERSET) & ~ALPHA_PSL_USERCLR;
regtoframe((struct reg *)ksc.sc_regs, p->p_md.md_tf);
alpha_pal_wrusp(ksc.sc_regs[R_SP]);
/* XXX ksc.sc_ownedfp ? */
if (p->p_addr->u_pcb.pcb_fpcpu != NULL)
fpusave_proc(p, 0);
memcpy(&p->p_addr->u_pcb.pcb_fp, (struct fpreg *)ksc.sc_fpregs,
sizeof(struct fpreg));
#ifndef NO_IEEE
p->p_addr->u_pcb.pcb_fp.fpr_cr = ksc.sc_fpcr;
p->p_md.md_flags = ksc.sc_fp_control & MDP_FP_C;
#endif
#ifdef DEBUG
if (sigdebug & SDB_FOLLOW)
printf("sigreturn(%d): returns\n", p->p_pid);
#endif
return (EJUSTRETURN);
}
/*
* machine dependent system variables.
*/
int
cpu_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p)
int *name;
u_int namelen;
void *oldp;
size_t *oldlenp;
void *newp;
size_t newlen;
struct proc *p;
{
dev_t consdev;
if (name[0] != CPU_CHIPSET && namelen != 1)
return (ENOTDIR); /* overloaded */
switch (name[0]) {
case CPU_CONSDEV:
if (cn_tab != NULL)
consdev = cn_tab->cn_dev;
else
consdev = NODEV;
return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev,
sizeof consdev));
case CPU_ROOT_DEVICE:
return (sysctl_rdstring(oldp, oldlenp, newp,
root_device));
#ifndef SMALL_KERNEL
case CPU_UNALIGNED_PRINT:
return (sysctl_int(oldp, oldlenp, newp, newlen,
&alpha_unaligned_print));
case CPU_UNALIGNED_FIX:
return (sysctl_int(oldp, oldlenp, newp, newlen,
&alpha_unaligned_fix));
case CPU_UNALIGNED_SIGBUS:
return (sysctl_int(oldp, oldlenp, newp, newlen,
&alpha_unaligned_sigbus));
case CPU_BOOTED_KERNEL:
return (sysctl_rdstring(oldp, oldlenp, newp,
bootinfo.booted_kernel));
case CPU_CHIPSET:
return (alpha_sysctl_chipset(name + 1, namelen - 1, oldp,
oldlenp));
#endif /* SMALL_KERNEL */
#ifndef NO_IEEE
case CPU_FP_SYNC_COMPLETE:
return (sysctl_int(oldp, oldlenp, newp, newlen,
&alpha_fp_sync_complete));
#endif
case CPU_ALLOWAPERTURE:
#ifdef APERTURE
if (securelevel > 0)
return (sysctl_int_lower(oldp, oldlenp, newp, newlen,
&allowaperture));
else
return (sysctl_int(oldp, oldlenp, newp, newlen,
&allowaperture));
#else
return (sysctl_rdint(oldp, oldlenp, newp, 0));
#endif
default:
return (EOPNOTSUPP);
}
/* NOTREACHED */
}
/*
* Set registers on exec.
*/
void
setregs(p, pack, stack, retval)
register struct proc *p;
struct exec_package *pack;
u_long stack;
register_t *retval;
{
struct trapframe *tfp = p->p_md.md_tf;
#ifdef DEBUG
int i;
#endif
#ifdef DEBUG
/*
* Crash and dump, if the user requested it.
*/
if (boothowto & RB_DUMP)
panic("crash requested by boot flags");
#endif
#ifdef DEBUG
for (i = 0; i < FRAME_SIZE; i++)
tfp->tf_regs[i] = 0xbabefacedeadbeef;
#else
bzero(tfp->tf_regs, FRAME_SIZE * sizeof tfp->tf_regs[0]);
#endif
bzero(&p->p_addr->u_pcb.pcb_fp, sizeof p->p_addr->u_pcb.pcb_fp);
alpha_pal_wrusp(stack);
tfp->tf_regs[FRAME_PS] = ALPHA_PSL_USERSET;
tfp->tf_regs[FRAME_PC] = pack->ep_entry & ~3;
tfp->tf_regs[FRAME_A0] = stack;
/* a1 and a2 already zeroed */
tfp->tf_regs[FRAME_T12] = tfp->tf_regs[FRAME_PC]; /* a.k.a. PV */
p->p_md.md_flags &= ~MDP_FPUSED;
#ifndef NO_IEEE
if (__predict_true((p->p_md.md_flags & IEEE_INHERIT) == 0)) {
p->p_md.md_flags &= ~MDP_FP_C;
p->p_addr->u_pcb.pcb_fp.fpr_cr = FPCR_DYN(FP_RN);
}
#endif
if (p->p_addr->u_pcb.pcb_fpcpu != NULL)
fpusave_proc(p, 0);
retval[1] = 0;
}
/*
* Release the FPU.
*/
void
fpusave_cpu(struct cpu_info *ci, int save)
{
struct proc *p;
KDASSERT(ci == curcpu());
#if defined(MULTIPROCESSOR)
atomic_setbits_ulong(&ci->ci_flags, CPUF_FPUSAVE);
#endif
p = ci->ci_fpcurproc;
if (p == NULL)
goto out;
if (save) {
alpha_pal_wrfen(1);
savefpstate(&p->p_addr->u_pcb.pcb_fp);
}
alpha_pal_wrfen(0);
p->p_addr->u_pcb.pcb_fpcpu = NULL;
ci->ci_fpcurproc = NULL;
out:
#if defined(MULTIPROCESSOR)
atomic_clearbits_ulong(&ci->ci_flags, CPUF_FPUSAVE);
#endif
return;
}
/*
* Synchronize FP state for this process.
*/
void
fpusave_proc(struct proc *p, int save)
{
struct cpu_info *ci = curcpu();
struct cpu_info *oci;
#if defined(MULTIPROCESSOR)
u_long ipi = save ? ALPHA_IPI_SYNCH_FPU : ALPHA_IPI_DISCARD_FPU;
int spincount;
#endif
KDASSERT(p->p_addr != NULL);
oci = p->p_addr->u_pcb.pcb_fpcpu;
if (oci == NULL) {
return;
}
#if defined(MULTIPROCESSOR)
if (oci == ci) {
KASSERT(ci->ci_fpcurproc == p);
fpusave_cpu(ci, save);
return;
}
KASSERT(oci->ci_fpcurproc == p);
alpha_send_ipi(oci->ci_cpuid, ipi);
spincount = 0;
while (p->p_addr->u_pcb.pcb_fpcpu != NULL) {
spincount++;
delay(1000); /* XXX */
if (spincount > 10000)
panic("fpsave ipi didn't");
}
#else
KASSERT(ci->ci_fpcurproc == p);
fpusave_cpu(ci, save);
#endif /* MULTIPROCESSOR */
}
int
spl0()
{
if (ssir) {
(void) alpha_pal_swpipl(ALPHA_PSL_IPL_SOFT);
softintr_dispatch();
}
return (alpha_pal_swpipl(ALPHA_PSL_IPL_0));
}
/*
* The following primitives manipulate the run queues. _whichqs tells which
* of the 32 queues _qs have processes in them. Setrunqueue puts processes
* into queues, Remrunqueue removes them from queues. The running process is
* on no queue, other processes are on a queue related to p->p_priority,
* divided by 4 actually to shrink the 0-127 range of priorities into the 32
* available queues.
*/
/*
* setrunqueue(p)
* proc *p;
*
* Call should be made at splclock(), and p->p_stat should be SRUN.
*/
/* XXXART - grmble */
#define sched_qs qs
#define sched_whichqs whichqs
void
setrunqueue(p)
struct proc *p;
{
int bit;
/* firewall: p->p_back must be NULL */
if (p->p_back != NULL)
panic("setrunqueue");
bit = p->p_priority >> 2;
sched_whichqs |= (1 << bit);
p->p_forw = (struct proc *)&sched_qs[bit];
p->p_back = sched_qs[bit].ph_rlink;
p->p_back->p_forw = p;
sched_qs[bit].ph_rlink = p;
}
/*
* remrunqueue(p)
*
* Call should be made at splclock().
*/
void
remrunqueue(p)
struct proc *p;
{
int bit;
bit = p->p_priority >> 2;
if ((sched_whichqs & (1 << bit)) == 0)
panic("remrunqueue");
p->p_back->p_forw = p->p_forw;
p->p_forw->p_back = p->p_back;
p->p_back = NULL; /* for firewall checking. */
if ((struct proc *)&sched_qs[bit] == sched_qs[bit].ph_link)
sched_whichqs &= ~(1 << bit);
}
/*
* Wait "n" microseconds.
*/
void
delay(n)
unsigned long n;
{
unsigned long pcc0, pcc1, curcycle, cycles, usec;
if (n == 0)
return;
pcc0 = alpha_rpcc() & 0xffffffffUL;
cycles = 0;
usec = 0;
while (usec <= n) {
/*
* Get the next CPU cycle count - assumes that we can not
* have had more than one 32 bit overflow.
*/
pcc1 = alpha_rpcc() & 0xffffffffUL;
if (pcc1 < pcc0)
curcycle = (pcc1 + 0x100000000UL) - pcc0;
else
curcycle = pcc1 - pcc0;
/*
* We now have the number of processor cycles since we
* last checked. Add the current cycle count to the
* running total. If it's over cycles_per_usec, increment
* the usec counter.
*/
cycles += curcycle;
while (cycles > cycles_per_usec) {
usec++;
cycles -= cycles_per_usec;
}
pcc0 = pcc1;
}
}
#if defined(COMPAT_OSF1)
void cpu_exec_ecoff_setregs(struct proc *, struct exec_package *,
u_long, register_t *);
void
cpu_exec_ecoff_setregs(p, epp, stack, retval)
struct proc *p;
struct exec_package *epp;
u_long stack;
register_t *retval;
{
struct ecoff_exechdr *execp = (struct ecoff_exechdr *)epp->ep_hdr;
setregs(p, epp, stack, retval);
p->p_md.md_tf->tf_regs[FRAME_GP] = execp->a.gp_value;
}
/*
* cpu_exec_ecoff_hook():
* cpu-dependent ECOFF format hook for execve().
*
* Do any machine-dependent diddling of the exec package when doing ECOFF.
*
*/
int
cpu_exec_ecoff_hook(p, epp)
struct proc *p;
struct exec_package *epp;
{
struct ecoff_exechdr *execp = (struct ecoff_exechdr *)epp->ep_hdr;
extern struct emul emul_native;
int error;
extern int osf1_exec_ecoff_hook(struct proc *, struct exec_package *);
switch (execp->f.f_magic) {
#ifdef COMPAT_OSF1
case ECOFF_MAGIC_ALPHA:
error = osf1_exec_ecoff_hook(p, epp);
break;
#endif
case ECOFF_MAGIC_NATIVE_ALPHA:
epp->ep_emul = &emul_native;
error = 0;
break;
default:
error = ENOEXEC;
}
return (error);
}
#endif
int
alpha_pa_access(pa)
u_long pa;
{
int i;
for (i = 0; i < mem_cluster_cnt; i++) {
if (pa < mem_clusters[i].start)
continue;
if ((pa - mem_clusters[i].start) >=
(mem_clusters[i].size & ~PAGE_MASK))
continue;
return (mem_clusters[i].size & PAGE_MASK); /* prot */
}
/*
* Address is not a memory address. If we're secure, disallow
* access. Otherwise, grant read/write.
*/
if (securelevel > 0)
return (VM_PROT_NONE);
else
return (VM_PROT_READ | VM_PROT_WRITE);
}
/* XXX XXX BEGIN XXX XXX */
paddr_t alpha_XXX_dmamap_or; /* XXX */
/* XXX */
paddr_t /* XXX */
alpha_XXX_dmamap(v) /* XXX */
vaddr_t v; /* XXX */
{ /* XXX */
/* XXX */
return (vtophys(v) | alpha_XXX_dmamap_or); /* XXX */
} /* XXX */
/* XXX XXX END XXX XXX */
![[BACK]](/icons/back.gif){kind=icon}
Return to machdep.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / sys / arch / alpha / alpha