svn commit: r214903 - in head/sys: conf mips/include mips/mips sys
vm
Oleksandr Tymoshenko
gonzo at FreeBSD.org
Sun Nov 7 03:09:03 UTC 2010
Author: gonzo
Date: Sun Nov 7 03:09:02 2010
New Revision: 214903
URL: http://svn.freebsd.org/changeset/base/214903
Log:
- Add minidump support for FreeBSD/mips
Added:
head/sys/mips/mips/minidump_machdep.c (contents, props changed)
Modified:
head/sys/conf/files.mips
head/sys/mips/include/cpuregs.h
head/sys/mips/include/md_var.h
head/sys/mips/include/pmap.h
head/sys/mips/mips/dump_machdep.c
head/sys/mips/mips/machdep.c
head/sys/sys/kerneldump.h
head/sys/vm/vm_page.c
Modified: head/sys/conf/files.mips
==============================================================================
--- head/sys/conf/files.mips Sun Nov 7 02:20:34 2010 (r214902)
+++ head/sys/conf/files.mips Sun Nov 7 03:09:02 2010 (r214903)
@@ -55,6 +55,7 @@ mips/mips/db_trace.c optional ddb
mips/mips/dump_machdep.c standard
mips/mips/in_cksum.c optional inet
mips/mips/locore.S standard no-obj
+mips/mips/minidump_machdep.c standard
mips/mips/mem.c optional mem
mips/mips/nexus.c standard
mips/mips/stack_machdep.c optional ddb | stack
Modified: head/sys/mips/include/cpuregs.h
==============================================================================
--- head/sys/mips/include/cpuregs.h Sun Nov 7 02:20:34 2010 (r214902)
+++ head/sys/mips/include/cpuregs.h Sun Nov 7 03:09:02 2010 (r214903)
@@ -181,6 +181,9 @@
#define MIPS_XUSEG_END 0x0000010000000000
#define MIPS_XKSEG_START 0xc000000000000000
#define MIPS_XKSEG_END 0xc00000ff80000000
+#define MIPS_XKSEG_COMPAT32_START 0xffffffff80000000
+#define MIPS_XKSEG_COMPAT32_END 0xffffffffffffffff
+#define MIPS_XKSEG_TO_COMPAT32(va) ((va) & 0xffffffff)
#ifdef __mips_n64
#define MIPS_DIRECT_MAPPABLE(pa) 1
Modified: head/sys/mips/include/md_var.h
==============================================================================
--- head/sys/mips/include/md_var.h Sun Nov 7 02:20:34 2010 (r214902)
+++ head/sys/mips/include/md_var.h Sun Nov 7 03:09:02 2010 (r214903)
@@ -42,6 +42,8 @@
extern long Maxmem;
extern char sigcode[];
extern int szsigcode, szosigcode;
+extern uint32_t *vm_page_dump;
+extern int vm_page_dump_size;
extern vm_offset_t kstack0;
extern vm_offset_t kernel_kseg0_end;
@@ -74,4 +76,7 @@ void platform_identify(void);
extern int busdma_swi_pending;
void busdma_swi(void);
+
+struct dumperinfo;
+void minidumpsys(struct dumperinfo *);
#endif /* !_MACHINE_MD_VAR_H_ */
Modified: head/sys/mips/include/pmap.h
==============================================================================
--- head/sys/mips/include/pmap.h Sun Nov 7 02:20:34 2010 (r214902)
+++ head/sys/mips/include/pmap.h Sun Nov 7 03:09:02 2010 (r214903)
@@ -144,6 +144,8 @@ extern vm_offset_t physmem_desc[PHYS_AVA
extern vm_offset_t virtual_avail;
extern vm_offset_t virtual_end;
+extern vm_paddr_t dump_avail[PHYS_AVAIL_ENTRIES + 2];
+
#define pmap_page_get_memattr(m) VM_MEMATTR_DEFAULT
#define pmap_page_is_mapped(m) (!TAILQ_EMPTY(&(m)->md.pv_list))
#define pmap_page_set_memattr(m, ma) (void)0
Modified: head/sys/mips/mips/dump_machdep.c
==============================================================================
--- head/sys/mips/mips/dump_machdep.c Sun Nov 7 02:20:34 2010 (r214902)
+++ head/sys/mips/mips/dump_machdep.c Sun Nov 7 03:09:02 2010 (r214903)
@@ -1,35 +1,362 @@
/*-
- * Copyright (c) 2006 Oleksandr Tymoshenko
+ * Copyright (c) 2002 Marcel Moolenaar
* 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,
- * without modification, immediately at the beginning of the file.
- * 2. The name of the author may not be used to endorse or promote products
- * derived from this software without specific prior written permission.
*
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+ * 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 AUTHOR ``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 AUTHOR 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>
__FBSDID("$FreeBSD$");
-/* Note to writer, when using pmap_kenter_temporary() you must,
- * after using the va to write out the page, call
- * pmap_kenter_temporary_free(). You should probably also
- * pin the dump thread to the CPU with sched_pin().
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/conf.h>
+#include <sys/cons.h>
+#include <sys/sysctl.h>
+#include <sys/kernel.h>
+#include <sys/proc.h>
+#include <sys/kerneldump.h>
+#include <vm/vm.h>
+#include <vm/pmap.h>
+#include <machine/elf.h>
+#include <machine/md_var.h>
+#include <machine/pcb.h>
+#include <machine/cache.h>
+
+CTASSERT(sizeof(struct kerneldumpheader) == 512);
+
+int do_minidump = 1;
+TUNABLE_INT("debug.minidump", &do_minidump);
+SYSCTL_INT(_debug, OID_AUTO, minidump, CTLFLAG_RW, &do_minidump, 0,
+ "Enable mini crash dumps");
+
+/*
+ * Don't touch the first SIZEOF_METADATA bytes on the dump device. This
+ * is to protect us from metadata and to protect metadata from us.
*/
+#define SIZEOF_METADATA (64*1024)
+
+#define MD_ALIGN(x) (((off_t)(x) + PAGE_MASK) & ~PAGE_MASK)
+#define DEV_ALIGN(x) (((off_t)(x) + (DEV_BSIZE-1)) & ~(DEV_BSIZE-1))
+extern struct pcb dumppcb;
+
+struct md_pa {
+ vm_paddr_t md_start;
+ vm_paddr_t md_size;
+};
+
+typedef int callback_t(struct md_pa *, int, void *);
+
+static struct kerneldumpheader kdh;
+static off_t dumplo, fileofs;
+
+/* Handle buffered writes. */
+static char buffer[DEV_BSIZE];
+static size_t fragsz;
+
+/* XXX: I suppose 20 should be enough. */
+static struct md_pa dump_map[20];
+
+static void
+md_pa_init(void)
+{
+ int n, idx;
+
+ bzero(dump_map, sizeof(dump_map));
+ for (n = 0; n < sizeof(dump_map) / sizeof(dump_map[0]); n++) {
+ idx = n * 2;
+ if (dump_avail[idx] == 0 && dump_avail[idx + 1] == 0)
+ break;
+ dump_map[n].md_start = dump_avail[idx];
+ dump_map[n].md_size = dump_avail[idx + 1] - dump_avail[idx];
+ }
+}
+
+static struct md_pa *
+md_pa_first(void)
+{
+
+ return (&dump_map[0]);
+}
+
+static struct md_pa *
+md_pa_next(struct md_pa *mdp)
+{
+
+ mdp++;
+ if (mdp->md_size == 0)
+ mdp = NULL;
+ return (mdp);
+}
+
+static int
+buf_write(struct dumperinfo *di, char *ptr, size_t sz)
+{
+ size_t len;
+ int error;
+
+ while (sz) {
+ len = DEV_BSIZE - fragsz;
+ if (len > sz)
+ len = sz;
+ bcopy(ptr, buffer + fragsz, len);
+ fragsz += len;
+ ptr += len;
+ sz -= len;
+ if (fragsz == DEV_BSIZE) {
+ error = dump_write(di, buffer, 0, dumplo,
+ DEV_BSIZE);
+ if (error)
+ return error;
+ dumplo += DEV_BSIZE;
+ fragsz = 0;
+ }
+ }
+
+ return (0);
+}
+
+static int
+buf_flush(struct dumperinfo *di)
+{
+ int error;
+
+ if (fragsz == 0)
+ return (0);
+
+ error = dump_write(di, buffer, 0, dumplo, DEV_BSIZE);
+ dumplo += DEV_BSIZE;
+ fragsz = 0;
+ return (error);
+}
+
+extern vm_offset_t kernel_l1kva;
+extern char *pouet2;
+
+static int
+cb_dumpdata(struct md_pa *mdp, int seqnr, void *arg)
+{
+ struct dumperinfo *di = (struct dumperinfo*)arg;
+ vm_paddr_t pa;
+ uint32_t pgs;
+ size_t counter, sz, chunk;
+ int c, error;
+
+ error = 0; /* catch case in which chunk size is 0 */
+ counter = 0;
+ pgs = mdp->md_size / PAGE_SIZE;
+ pa = mdp->md_start;
+
+ printf(" chunk %d: %dMB (%d pages)", seqnr, pgs * PAGE_SIZE / (
+ 1024*1024), pgs);
+
+ /* Make sure we write coherent datas. */
+ mips_dcache_wbinv_all();
+ while (pgs) {
+ chunk = pgs;
+ if (chunk > MAXDUMPPGS)
+ chunk = MAXDUMPPGS;
+ sz = chunk << PAGE_SHIFT;
+ counter += sz;
+ if (counter >> 24) {
+ printf(" %d", pgs * PAGE_SIZE);
+ counter &= (1<<24) - 1;
+ }
+
+ error = dump_write(di, (void *)(pa),0, dumplo, sz);
+ if (error)
+ break;
+ dumplo += sz;
+ pgs -= chunk;
+ pa += sz;
+
+ /* Check for user abort. */
+ c = cncheckc();
+ if (c == 0x03)
+ return (ECANCELED);
+ if (c != -1)
+ printf(" (CTRL-C to abort) ");
+ }
+ printf(" ... %s\n", (error) ? "fail" : "ok");
+ return (error);
+}
+
+static int
+cb_dumphdr(struct md_pa *mdp, int seqnr, void *arg)
+{
+ struct dumperinfo *di = (struct dumperinfo*)arg;
+ Elf_Phdr phdr;
+ uint64_t size;
+ int error;
+
+ size = mdp->md_size;
+ bzero(&phdr, sizeof(phdr));
+ phdr.p_type = PT_LOAD;
+ phdr.p_flags = PF_R; /* XXX */
+ phdr.p_offset = fileofs;
+ phdr.p_vaddr = mdp->md_start;
+ phdr.p_paddr = mdp->md_start;
+ phdr.p_filesz = size;
+ phdr.p_memsz = size;
+ phdr.p_align = PAGE_SIZE;
+
+ error = buf_write(di, (char*)&phdr, sizeof(phdr));
+ fileofs += phdr.p_filesz;
+ return (error);
+}
+
+static int
+cb_size(struct md_pa *mdp, int seqnr, void *arg)
+{
+ uint32_t *sz = (uint32_t*)arg;
+
+ *sz += (uint32_t)mdp->md_size;
+ return (0);
+}
+
+static int
+foreach_chunk(callback_t cb, void *arg)
+{
+ struct md_pa *mdp;
+ int error, seqnr;
+
+ seqnr = 0;
+ mdp = md_pa_first();
+ while (mdp != NULL) {
+ error = (*cb)(mdp, seqnr++, arg);
+ if (error)
+ return (-error);
+ mdp = md_pa_next(mdp);
+ }
+ return (seqnr);
+}
+
+void
+dumpsys(struct dumperinfo *di)
+{
+ Elf_Ehdr ehdr;
+ uint32_t dumpsize;
+ off_t hdrgap;
+ size_t hdrsz;
+ int error;
+
+ if (do_minidump) {
+ minidumpsys(di);
+ return;
+ }
+
+ bzero(&ehdr, sizeof(ehdr));
+ ehdr.e_ident[EI_MAG0] = ELFMAG0;
+ ehdr.e_ident[EI_MAG1] = ELFMAG1;
+ ehdr.e_ident[EI_MAG2] = ELFMAG2;
+ ehdr.e_ident[EI_MAG3] = ELFMAG3;
+ ehdr.e_ident[EI_CLASS] = ELF_CLASS;
+#if BYTE_ORDER == LITTLE_ENDIAN
+ ehdr.e_ident[EI_DATA] = ELFDATA2LSB;
+#else
+ ehdr.e_ident[EI_DATA] = ELFDATA2MSB;
+#endif
+ ehdr.e_ident[EI_VERSION] = EV_CURRENT;
+ ehdr.e_ident[EI_OSABI] = ELFOSABI_STANDALONE; /* XXX big picture? */
+ ehdr.e_type = ET_CORE;
+ ehdr.e_machine = EM_MIPS;
+ ehdr.e_phoff = sizeof(ehdr);
+ ehdr.e_flags = 0;
+ ehdr.e_ehsize = sizeof(ehdr);
+ ehdr.e_phentsize = sizeof(Elf_Phdr);
+ ehdr.e_shentsize = sizeof(Elf_Shdr);
+
+ md_pa_init();
+
+ /* Calculate dump size. */
+ dumpsize = 0L;
+ ehdr.e_phnum = foreach_chunk(cb_size, &dumpsize);
+ hdrsz = ehdr.e_phoff + ehdr.e_phnum * ehdr.e_phentsize;
+ fileofs = MD_ALIGN(hdrsz);
+ dumpsize += fileofs;
+ hdrgap = fileofs - DEV_ALIGN(hdrsz);
+
+ /* Determine dump offset on device. */
+ if (di->mediasize < SIZEOF_METADATA + dumpsize + sizeof(kdh) * 2) {
+ error = ENOSPC;
+ goto fail;
+ }
+ dumplo = di->mediaoffset + di->mediasize - dumpsize;
+ dumplo -= sizeof(kdh) * 2;
+
+ mkdumpheader(&kdh, KERNELDUMPMAGIC, KERNELDUMP_MIPS_VERSION, dumpsize, di->blocksize);
+
+ printf("Dumping %llu MB (%d chunks)\n", (long long)dumpsize >> 20,
+ ehdr.e_phnum);
+
+ /* Dump leader */
+ error = dump_write(di, &kdh, 0, dumplo, sizeof(kdh));
+ if (error)
+ goto fail;
+ dumplo += sizeof(kdh);
+
+ /* Dump ELF header */
+ error = buf_write(di, (char*)&ehdr, sizeof(ehdr));
+ if (error)
+ goto fail;
+
+ /* Dump program headers */
+ error = foreach_chunk(cb_dumphdr, di);
+ if (error < 0)
+ goto fail;
+ buf_flush(di);
+
+ /*
+ * All headers are written using blocked I/O, so we know the
+ * current offset is (still) block aligned. Skip the alignement
+ * in the file to have the segment contents aligned at page
+ * boundary. We cannot use MD_ALIGN on dumplo, because we don't
+ * care and may very well be unaligned within the dump device.
+ */
+ dumplo += hdrgap;
+
+ /* Dump memory chunks (updates dumplo) */
+ error = foreach_chunk(cb_dumpdata, di);
+ if (error < 0)
+ goto fail;
+
+ /* Dump trailer */
+ error = dump_write(di, &kdh, 0, dumplo, sizeof(kdh));
+ if (error)
+ goto fail;
+
+ /* Signal completion, signoff and exit stage left. */
+ dump_write(di, NULL, 0, 0, 0);
+ printf("\nDump complete\n");
+ return;
+
+ fail:
+ if (error < 0)
+ error = -error;
+
+ if (error == ECANCELED)
+ printf("\nDump aborted\n");
+ else if (error == ENOSPC)
+ printf("\nDump failed. Partition too small.\n");
+ else
+ printf("\n** DUMP FAILED (ERROR %d) **\n", error);
+}
Modified: head/sys/mips/mips/machdep.c
==============================================================================
--- head/sys/mips/mips/machdep.c Sun Nov 7 02:20:34 2010 (r214902)
+++ head/sys/mips/mips/machdep.c Sun Nov 7 03:09:02 2010 (r214903)
@@ -138,6 +138,7 @@ struct pcpu *pcpup = (struct pcpu *)pcpu
vm_offset_t phys_avail[PHYS_AVAIL_ENTRIES + 2];
vm_offset_t physmem_desc[PHYS_AVAIL_ENTRIES + 2];
+vm_paddr_t dump_avail[PHYS_AVAIL_ENTRIES + 2];
#ifdef UNIMPLEMENTED
struct platform platform;
@@ -488,13 +489,6 @@ cpu_idle(int busy)
panic("ints disabled in idleproc!");
}
-void
-dumpsys(struct dumperinfo *di __unused)
-{
-
- printf("Kernel dumps not implemented on this architecture\n");
-}
-
int
cpu_idle_wakeup(int cpu)
{
Added: head/sys/mips/mips/minidump_machdep.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/mips/mips/minidump_machdep.c Sun Nov 7 03:09:02 2010 (r214903)
@@ -0,0 +1,340 @@
+/*-
+ * Copyright (c) 2010 Oleksandr Tymoshenko <gonzo at freebsd.org>
+ * Copyright (c) 2008 Semihalf, Grzegorz Bernacki
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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: FreeBSD: src/sys/arm/arm/minidump_machdep.c v214223
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/conf.h>
+#include <sys/cons.h>
+#include <sys/kernel.h>
+#include <sys/kerneldump.h>
+#include <sys/msgbuf.h>
+#include <vm/vm.h>
+#include <vm/pmap.h>
+#include <machine/pmap.h>
+#include <machine/atomic.h>
+#include <machine/elf.h>
+#include <machine/md_var.h>
+#include <machine/vmparam.h>
+#include <machine/minidump.h>
+#include <machine/cache.h>
+
+CTASSERT(sizeof(struct kerneldumpheader) == 512);
+
+/*
+ * Don't touch the first SIZEOF_METADATA bytes on the dump device. This
+ * is to protect us from metadata and to protect metadata from us.
+ */
+#define SIZEOF_METADATA (64*1024)
+
+uint32_t *vm_page_dump;
+int vm_page_dump_size;
+
+static struct kerneldumpheader kdh;
+static off_t dumplo;
+static off_t origdumplo;
+
+/* Handle chunked writes. */
+static uint64_t counter, progress;
+/* Just auxiliary bufffer */
+static char tmpbuffer[PAGE_SIZE];
+
+extern pd_entry_t *kernel_segmap;
+
+CTASSERT(sizeof(*vm_page_dump) == 4);
+
+static int
+is_dumpable(vm_paddr_t pa)
+{
+ int i;
+
+ for (i = 0; dump_avail[i] != 0 || dump_avail[i + 1] != 0; i += 2) {
+ if (pa >= dump_avail[i] && pa < dump_avail[i + 1])
+ return (1);
+ }
+ return (0);
+}
+
+static void
+dump_add_page(vm_paddr_t pa)
+{
+ int idx, bit;
+
+ pa >>= PAGE_SHIFT;
+ idx = pa >> 5; /* 2^5 = 32 */
+ bit = pa & 31;
+ atomic_set_int(&vm_page_dump[idx], 1ul << bit);
+}
+
+static void
+dump_drop_page(vm_paddr_t pa)
+{
+ int idx, bit;
+
+ pa >>= PAGE_SHIFT;
+ idx = pa >> 5; /* 2^5 = 32 */
+ bit = pa & 31;
+ atomic_clear_int(&vm_page_dump[idx], 1ul << bit);
+}
+
+#define PG2MB(pgs) (((pgs) + (1 << 8) - 1) >> 8)
+
+static int
+write_buffer(struct dumperinfo *di, char *ptr, size_t sz)
+{
+ size_t len;
+ int error, c;
+ u_int maxdumpsz;
+
+ maxdumpsz = di->maxiosize;
+
+ if (maxdumpsz == 0) /* seatbelt */
+ maxdumpsz = PAGE_SIZE;
+
+ error = 0;
+
+ while (sz) {
+ len = min(maxdumpsz, sz);
+ counter += len;
+ progress -= len;
+
+ if (counter >> 22) {
+ printf(" %jd", PG2MB(progress >> PAGE_SHIFT));
+ counter &= (1<<22) - 1;
+ }
+
+ if (ptr) {
+ error = dump_write(di, ptr, 0, dumplo, len);
+ if (error)
+ return (error);
+ dumplo += len;
+ ptr += len;
+ sz -= len;
+ } else {
+ panic("pa is not supported");
+ }
+
+ /* Check for user abort. */
+ c = cncheckc();
+ if (c == 0x03)
+ return (ECANCELED);
+ if (c != -1)
+ printf(" (CTRL-C to abort) ");
+ }
+
+ return (0);
+}
+
+void
+minidumpsys(struct dumperinfo *di)
+{
+ struct minidumphdr mdhdr;
+ uint64_t dumpsize;
+ uint32_t ptesize;
+ uint32_t bits;
+ vm_paddr_t pa;
+ vm_offset_t prev_pte = 0;
+ uint32_t count = 0;
+ vm_offset_t va;
+ pt_entry_t *pte;
+ int i, bit, error;
+ void *dump_va;
+
+ /* Flush cache */
+ mips_dcache_wbinv_all();
+
+ counter = 0;
+ /* Walk page table pages, set bits in vm_page_dump */
+ ptesize = 0;
+
+ for (va = VM_MIN_KERNEL_ADDRESS; va < kernel_vm_end; va += NBPDR) {
+ ptesize += PAGE_SIZE;
+ pte = pmap_pte(kernel_pmap, va);
+ KASSERT(pte != NULL, ("pte for %jx is NULL", (uintmax_t)va));
+ for (i = 0; i < NPTEPG; i++) {
+ if (pte_test(&pte[i], PTE_V)) {
+ pa = TLBLO_PTE_TO_PA(pte[i]);
+ if (is_dumpable(pa))
+ dump_add_page(pa);
+ }
+ }
+ }
+
+ /*
+ * Now mark pages from 0 to phys_avail[0], that's where kernel
+ * and pages allocated by pmap_steal reside
+ */
+ for (pa = 0; pa < phys_avail[0]; pa += PAGE_SIZE) {
+ if (is_dumpable(pa))
+ dump_add_page(pa);
+ }
+
+ /* Calculate dump size. */
+ dumpsize = ptesize;
+ dumpsize += round_page(msgbufp->msg_size);
+ dumpsize += round_page(vm_page_dump_size);
+
+ for (i = 0; i < vm_page_dump_size / sizeof(*vm_page_dump); i++) {
+ bits = vm_page_dump[i];
+ while (bits) {
+ bit = ffs(bits) - 1;
+ pa = (((uint64_t)i * sizeof(*vm_page_dump) * NBBY) +
+ bit) * PAGE_SIZE;
+ /* Clear out undumpable pages now if needed */
+ if (is_dumpable(pa))
+ dumpsize += PAGE_SIZE;
+ else
+ dump_drop_page(pa);
+ bits &= ~(1ul << bit);
+ }
+ }
+
+ dumpsize += PAGE_SIZE;
+
+ /* Determine dump offset on device. */
+ if (di->mediasize < SIZEOF_METADATA + dumpsize + sizeof(kdh) * 2) {
+ error = ENOSPC;
+ goto fail;
+ }
+
+ origdumplo = dumplo = di->mediaoffset + di->mediasize - dumpsize;
+ dumplo -= sizeof(kdh) * 2;
+ progress = dumpsize;
+
+ /* Initialize mdhdr */
+ bzero(&mdhdr, sizeof(mdhdr));
+ strcpy(mdhdr.magic, MINIDUMP_MAGIC);
+ mdhdr.version = MINIDUMP_VERSION;
+ mdhdr.msgbufsize = msgbufp->msg_size;
+ mdhdr.bitmapsize = vm_page_dump_size;
+ mdhdr.ptesize = ptesize;
+ mdhdr.kernbase = VM_MIN_KERNEL_ADDRESS;
+
+ mkdumpheader(&kdh, KERNELDUMPMAGIC, KERNELDUMP_MIPS_VERSION, dumpsize,
+ di->blocksize);
+
+ printf("Physical memory: %ju MB\n",
+ (uintmax_t)ptoa((uintmax_t)physmem) / 1048576);
+ printf("Dumping %llu MB:", (long long)dumpsize >> 20);
+
+ /* Dump leader */
+ error = dump_write(di, &kdh, 0, dumplo, sizeof(kdh));
+ if (error)
+ goto fail;
+ dumplo += sizeof(kdh);
+
+ /* Dump my header */
+ bzero(tmpbuffer, sizeof(tmpbuffer));
+ bcopy(&mdhdr, tmpbuffer, sizeof(mdhdr));
+ error = write_buffer(di, tmpbuffer, PAGE_SIZE);
+ if (error)
+ goto fail;
+
+ /* Dump msgbuf up front */
+ error = write_buffer(di, (char *)msgbufp->msg_ptr,
+ round_page(msgbufp->msg_size));
+ if (error)
+ goto fail;
+
+ /* Dump bitmap */
+ error = write_buffer(di, (char *)vm_page_dump,
+ round_page(vm_page_dump_size));
+ if (error)
+ goto fail;
+
+ /* Dump kernel page table pages */
+ for (va = VM_MIN_KERNEL_ADDRESS; va < kernel_vm_end; va += NBPDR) {
+ pte = pmap_pte(kernel_pmap, va);
+ KASSERT(pte != NULL, ("pte for %jx is NULL", (uintmax_t)va));
+ if (!count) {
+ prev_pte = (vm_offset_t)pte;
+ count++;
+ }
+ else {
+ if ((vm_offset_t)pte == (prev_pte + count * PAGE_SIZE))
+ count++;
+ else {
+ error = write_buffer(di, (char*)prev_pte,
+ count * PAGE_SIZE);
+ if (error)
+ goto fail;
+ count = 1;
+ prev_pte = (vm_offset_t)pte;
+ }
+ }
+ }
+
+ if (count) {
+ error = write_buffer(di, (char*)prev_pte, count * PAGE_SIZE);
+ if (error)
+ goto fail;
+ count = 0;
+ prev_pte = 0;
+ }
+
+ /* Dump memory chunks page by page*/
+ for (i = 0; i < vm_page_dump_size / sizeof(*vm_page_dump); i++) {
+ bits = vm_page_dump[i];
+ while (bits) {
+ bit = ffs(bits) - 1;
+ pa = (((uint64_t)i * sizeof(*vm_page_dump) * NBBY) +
+ bit) * PAGE_SIZE;
+ dump_va = pmap_kenter_temporary(pa, 0);
+ error = write_buffer(di, dump_va, PAGE_SIZE);
+ if (error)
+ goto fail;
+ pmap_kenter_temporary_free(pa);
+ bits &= ~(1ul << bit);
+ }
+ }
+
+ /* Dump trailer */
+ error = dump_write(di, &kdh, 0, dumplo, sizeof(kdh));
+ if (error)
+ goto fail;
+ dumplo += sizeof(kdh);
+
+ /* Signal completion, signoff and exit stage left. */
+ dump_write(di, NULL, 0, 0, 0);
+ printf("\nDump complete\n");
+ return;
+
+fail:
+ if (error < 0)
+ error = -error;
+
+ if (error == ECANCELED)
+ printf("\nDump aborted\n");
+ else if (error == ENOSPC)
+ printf("\nDump failed. Partition too small.\n");
+ else
+ printf("\n** DUMP FAILED (ERROR %d) **\n", error);
+}
Modified: head/sys/sys/kerneldump.h
==============================================================================
--- head/sys/sys/kerneldump.h Sun Nov 7 02:20:34 2010 (r214902)
+++ head/sys/sys/kerneldump.h Sun Nov 7 03:09:02 2010 (r214903)
@@ -71,6 +71,7 @@ struct kerneldumpheader {
#define KERNELDUMP_ARM_VERSION 1
#define KERNELDUMP_I386_VERSION 2
#define KERNELDUMP_IA64_VERSION 1
+#define KERNELDUMP_MIPS_VERSION 1
#define KERNELDUMP_POWERPC_VERSION 1
#define KERNELDUMP_SPARC64_VERSION 1
#define KERNELDUMP_TEXT_VERSION 1
Modified: head/sys/vm/vm_page.c
==============================================================================
--- head/sys/vm/vm_page.c Sun Nov 7 02:20:34 2010 (r214902)
+++ head/sys/vm/vm_page.c Sun Nov 7 03:09:02 2010 (r214903)
@@ -359,7 +359,8 @@ vm_page_startup(vm_offset_t vaddr)
bzero((void *)mapped, end - new_end);
uma_startup((void *)mapped, boot_pages);
-#if defined(__amd64__) || defined(__i386__) || defined(__arm__)
+#if defined(__amd64__) || defined(__i386__) || defined(__arm__) || \
+ defined(__mips__)
/*
* Allocate a bitmap to indicate that a random physical page
* needs to be included in a minidump.
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