[PATCH] Fix kexec on powerpc32
Maxim Uvarov
muvarov at gmail.com
Tue May 11 10:53:12 EDT 2010
Hello everybody,
Please find here patch for user land kexec-tools application. Following
patch makes kexec-tools work for both kexec and kdump. I tested it with
git kernel (linus-tree) and Freescale/Logic MPC8360ERDK board with
mpc83xx_defconfig kernel config.
kexec:
kexec -l vmlinux --command-line="console= ... etc"
kexec -e
kdump:
kexec -p vmlinux_dump --command-line="console=... etc"
echo c > /proc/sysrq-trigger
I also think that is is reasonable:
- put GAME_CUBE specific code to separate files;
- combine ppc and ppc64 to powerpc directory (I'm planning to do it.
And that why in some places my patch have ifdefs for PPC64);
Best regards,
Maxim Uvarov.
From: Maxim Uvarov <muvarov at gmail.com>
Signed-off-by: Maxim Uvarov <muvarov at gmail.com>
Signed-off-by: Maxim Uvarov <muvarov at gmail.com>
---
kexec/arch/ppc/Makefile | 2
kexec/arch/ppc/crashdump-powerpc.c | 439 ++++++++++++++++++++++++++++++++++
kexec/arch/ppc/crashdump-powerpc.h | 38 +++
kexec/arch/ppc/fs2dt.c | 460 ++++++++++++++++++++++++++++++++++++
kexec/arch/ppc/kexec-elf-ppc.c | 186 +++++++++++++--
kexec/arch/ppc/kexec-ppc.c | 276 ++++++++++++++++++++--
kexec/arch/ppc/kexec-ppc.h | 32 +++
purgatory/arch/ppc/Makefile | 2
purgatory/arch/ppc/purgatory-ppc.c | 38 ++-
purgatory/arch/ppc/purgatory-ppc.h | 4
purgatory/arch/ppc/v2wrap.S | 66 -----
purgatory/arch/ppc/v2wrap_32.S | 91 +++++++
12 files changed, 1524 insertions(+), 110 deletions(-)
create mode 100644 kexec/arch/ppc/crashdump-powerpc.c
create mode 100644 kexec/arch/ppc/crashdump-powerpc.h
create mode 100644 kexec/arch/ppc/fs2dt.c
delete mode 100644 purgatory/arch/ppc/v2wrap.S
create mode 100644 purgatory/arch/ppc/v2wrap_32.S
diff --git a/kexec/arch/ppc/Makefile b/kexec/arch/ppc/Makefile
index 1c7441c..5988213 100644
--- a/kexec/arch/ppc/Makefile
+++ b/kexec/arch/ppc/Makefile
@@ -11,6 +11,8 @@ ppc_KEXEC_SRCS += kexec/arch/ppc/kexec-uImage-ppc.c
ppc_KEXEC_SRCS += kexec/arch/ppc/ppc-setup-simple.S
ppc_KEXEC_SRCS += kexec/arch/ppc/ppc-setup-dol.S
ppc_KEXEC_SRCS += kexec/arch/ppc/fixup_dtb.c
+ppc_KEXEC_SRCS += kexec/arch/ppc/fs2dt.c
+ppc_KEXEC_SRCS += kexec/arch/ppc/crashdump-powerpc.c
ppc_KEXEC_SRCS += kexec/kexec-uImage.c
libfdt_SRCS = kexec/arch/ppc/libfdt-wrapper.c
diff --git a/kexec/arch/ppc/crashdump-powerpc.c b/kexec/arch/ppc/crashdump-powerpc.c
new file mode 100644
index 0000000..7bfad20
--- /dev/null
+++ b/kexec/arch/ppc/crashdump-powerpc.c
@@ -0,0 +1,439 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <limits.h>
+#include <elf.h>
+#include <dirent.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include "../../kexec.h"
+#include "../../kexec-elf.h"
+#include "../../kexec-syscall.h"
+#include "../../crashdump.h"
+#include "kexec-ppc.h"
+#include "crashdump-powerpc.h"
+
+#ifdef CONFIG_PPC64
+static struct crash_elf_info elf_info64 = {
+class: ELFCLASS64,
+data: ELFDATA2MSB,
+machine: EM_PPC64,
+backup_src_start: BACKUP_SRC_START,
+backup_src_end: BACKUP_SRC_END,
+page_offset: PAGE_OFFSET,
+lowmem_limit: MAXMEM,
+};
+#endif
+static struct crash_elf_info elf_info32 = {
+class: ELFCLASS32,
+data: ELFDATA2MSB,
+#ifdef CONFIG_PPC64
+machine: EM_PPC64,
+#else
+machine: EM_PPC,
+#endif
+backup_src_start: BACKUP_SRC_START,
+backup_src_end: BACKUP_SRC_END,
+page_offset: PAGE_OFFSET,
+lowmem_limit: MAXMEM,
+};
+
+/* Stores a sorted list of RAM memory ranges for which to create elf headers.
+ * A separate program header is created for backup region
+ */
+static struct memory_range *crash_memory_range;
+
+/* Define a variable to replace the CRASH_MAX_MEMORY_RANGES macro */
+static int crash_max_memory_ranges;
+
+/*
+ * Used to save various memory ranges/regions needed for the captured
+ * kernel to boot. (lime memmap= option in other archs)
+ */
+mem_rgns_t usablemem_rgns = {0, NULL};
+
+/*
+ * To store the memory size of the first kernel and this value will be
+ * passed to the second kernel as command line (savemaxmem=xM).
+ * The second kernel will be calculated saved_max_pfn based on this
+ * variable.
+ * Since we are creating/using usable-memory property, there is no way
+ * we can determine the RAM size unless parsing the device-tree/memoy@/reg
+ * property in the kernel.
+ */
+unsigned long long saved_max_mem;
+
+/* Reads the appropriate file and retrieves the SYSTEM RAM regions for whom to
+ * create Elf headers. Keeping it separate from get_memory_ranges() as
+ * requirements are different in the case of normal kexec and crashdumps.
+ *
+ * Normal kexec needs to look at all of available physical memory irrespective
+ * of the fact how much of it is being used by currently running kernel.
+ * Crashdumps need to have access to memory regions actually being used by
+ * running kernel. Expecting a different file/data structure than /proc/iomem
+ * to look into down the line. May be something like /proc/kernelmem or may
+ * be zone data structures exported from kernel.
+ */
+static int get_crash_memory_ranges(struct memory_range **range, int *ranges)
+{
+
+ int memory_ranges = 0;
+ char device_tree[256] = "/proc/device-tree/";
+ char fname[256];
+ char buf[MAXBYTES-1];
+ DIR *dir, *dmem;
+ FILE *file;
+ struct dirent *dentry, *mentry;
+ int i, n, crash_rng_len = 0;
+ unsigned long long start, end, cstart, cend;
+
+ crash_max_memory_ranges = max_memory_ranges + 6;
+ crash_rng_len = sizeof(struct memory_range) * crash_max_memory_ranges;
+
+ crash_memory_range = (struct memory_range *) malloc(crash_rng_len);
+ if (!crash_memory_range) {
+ fprintf(stderr, "Allocation for crash memory range failed\n");
+ return -1;
+ }
+ memset(crash_memory_range, 0, crash_rng_len);
+
+ /* create a separate program header for the backup region */
+ crash_memory_range[0].start = BACKUP_SRC_START;
+ crash_memory_range[0].end = BACKUP_SRC_END + 1;
+ crash_memory_range[0].type = RANGE_RAM;
+ memory_ranges++;
+
+ dir = opendir(device_tree);
+ if (!dir) {
+ perror(device_tree);
+ goto err;
+ }
+ while ((dentry = readdir(dir)) != NULL) {
+ if (strncmp(dentry->d_name, "memory@", 7)
+ && strcmp(dentry->d_name, "memory"))
+ continue;
+ strcpy(fname, device_tree);
+ strcat(fname, dentry->d_name);
+ dmem = opendir(fname);
+ if (!dmem) {
+ perror(fname);
+ closedir(dir);
+ goto err;
+ }
+ while ((mentry = readdir(dmem)) != NULL) {
+ if (strcmp(mentry->d_name, "reg"))
+ continue;
+ strcat(fname, "/reg");
+ file = fopen(fname, "r");
+ if (!file) {
+ perror(fname);
+ closedir(dmem);
+ closedir(dir);
+ goto err;
+ }
+ n = fread(buf, 1, MAXBYTES, file);
+ if (n < 0) {
+ perror(fname);
+ fclose(file);
+ closedir(dmem);
+ closedir(dir);
+ goto err;
+ }
+ if (memory_ranges >= (max_memory_ranges + 1)) {
+ /* No space to insert another element. */
+ fprintf(stderr,
+ "Error: Number of crash memory ranges"
+ " excedeed the max limit\n");
+ goto err;
+ }
+
+ /*
+ * FIXME: This code fails on platforms that
+ * have more than one memory range specified
+ * in the device-tree's /memory/reg property.
+ * or where the #address-cells and #size-cells
+ * are not identical.
+ *
+ * We should interpret the /memory/reg property
+ * based on the values of the #address-cells and
+ * #size-cells properites.
+ */
+ if (n == (sizeof(unsigned long) * 2)) {
+ start = ((unsigned long *)buf)[0];
+ end = start + ((unsigned long *)buf)[1];
+ } else {
+ start = ((unsigned long long *)buf)[0];
+ end = start + ((unsigned long long *)buf)[1];
+ }
+ if (start == 0 && end >= (BACKUP_SRC_END + 1))
+ start = BACKUP_SRC_END + 1;
+
+ cstart = crash_base;
+ cend = crash_base + crash_size;
+ /*
+ * Exclude the region that lies within crashkernel
+ */
+ if (cstart < end && cend > start) {
+ if (start < cstart && end > cend) {
+ crash_memory_range[memory_ranges].start
+ = start;
+ crash_memory_range[memory_ranges].end
+ = cstart;
+ crash_memory_range[memory_ranges].type
+ = RANGE_RAM;
+ memory_ranges++;
+ crash_memory_range[memory_ranges].start
+ = cend;
+ crash_memory_range[memory_ranges].end
+ = end;
+ crash_memory_range[memory_ranges].type
+ = RANGE_RAM;
+ memory_ranges++;
+ } else if (start < cstart) {
+ crash_memory_range[memory_ranges].start
+ = start;
+ crash_memory_range[memory_ranges].end
+ = cstart;
+ crash_memory_range[memory_ranges].type
+ = RANGE_RAM;
+ memory_ranges++;
+ } else if (end > cend) {
+ crash_memory_range[memory_ranges].start
+ = cend;
+ crash_memory_range[memory_ranges].end
+ = end;
+ crash_memory_range[memory_ranges].type
+ = RANGE_RAM;
+ memory_ranges++;
+ }
+ } else {
+ crash_memory_range[memory_ranges].start = start;
+ crash_memory_range[memory_ranges].end = end;
+ crash_memory_range[memory_ranges].type
+ = RANGE_RAM;
+ memory_ranges++;
+ }
+ fclose(file);
+ }
+ closedir(dmem);
+ }
+ closedir(dir);
+
+ /*
+ * If RTAS region is overlapped with crashkernel, need to create ELF
+ * Program header for the overlapped memory.
+ */
+ if (crash_base < rtas_base + rtas_size &&
+ rtas_base < crash_base + crash_size) {
+ cstart = rtas_base;
+ cend = rtas_base + rtas_size;
+ if (cstart < crash_base)
+ cstart = crash_base;
+ if (cend > crash_base + crash_size)
+ cend = crash_base + crash_size;
+ crash_memory_range[memory_ranges].start = cstart;
+ crash_memory_range[memory_ranges++].end = cend;
+ }
+ /*
+ * Can not trust the memory regions order that we read from
+ * device-tree. Hence, get the MAX end value.
+ */
+ for (i = 0; i < memory_ranges; i++)
+ if (saved_max_mem < crash_memory_range[i].end)
+ saved_max_mem = crash_memory_range[i].end;
+
+ *range = crash_memory_range;
+ *ranges = memory_ranges;
+#if DEBUG
+ int j;
+ printf("CRASH MEMORY RANGES\n");
+ for (j = 0; j < *ranges; j++) {
+ start = crash_memory_range[j].start;
+ end = crash_memory_range[j].end;
+ fprintf(stderr, "%016Lx-%016Lx\n", start, end);
+ }
+#endif
+ return 0;
+
+err:
+ if (crash_memory_range)
+ free(crash_memory_range);
+ return -1;
+}
+
+/* Converts unsigned long to ascii string. */
+static void ulltoa(unsigned long long i, char *str)
+{
+ int j = 0, k;
+ char tmp;
+
+ do {
+ str[j++] = i % 10 + '0';
+ } while ((i /= 10) > 0);
+ str[j] = '\0';
+
+ /* Reverse the string. */
+ for (j = 0, k = strlen(str) - 1; j < k; j++, k--) {
+ tmp = str[k];
+ str[k] = str[j];
+ str[j] = tmp;
+ }
+}
+
+static int add_cmdline_param(char *cmdline, unsigned long long addr,
+ char *cmdstr, char *byte)
+{
+ int cmdlen, len, align = 1024;
+ char str[COMMAND_LINE_SIZE], *ptr;
+
+ /* Passing in =xxxK / =xxxM format. Saves space required in cmdline.*/
+ switch (byte[0]) {
+ case 'K':
+ if (addr%align)
+ return -1;
+ addr = addr/align;
+ break;
+ case 'M':
+ addr = addr/(align *align);
+ break;
+ }
+ ptr = str;
+ strcpy(str, cmdstr);
+ ptr += strlen(str);
+ ulltoa(addr, ptr);
+ strcat(str, byte);
+ len = strlen(str);
+ cmdlen = strlen(cmdline) + len;
+ if (cmdlen > (COMMAND_LINE_SIZE - 1))
+ die("Command line overflow\n");
+ strcat(cmdline, str);
+#if DEBUG
+ fprintf(stderr, "Command line after adding elfcorehdr: %s\n", cmdline);
+#endif
+ return 0;
+}
+
+/* Loads additional segments in case of a panic kernel is being loaded.
+ * One segment for backup region, another segment for storing elf headers
+ * for crash memory image.
+ */
+int load_crashdump_segments(struct kexec_info *info, char *mod_cmdline,
+ unsigned long max_addr, unsigned long min_base)
+{
+ void *tmp;
+ unsigned long sz, elfcorehdr;
+ int nr_ranges, align = 1024, i;
+ unsigned long long end;
+ struct memory_range *mem_range;
+
+ if (get_crash_memory_ranges(&mem_range, &nr_ranges) < 0)
+ return -1;
+
+ /* Create a backup region segment to store backup data*/
+ sz = (BACKUP_SRC_SIZE + align - 1) & ~(align - 1);
+ tmp = xmalloc(sz);
+ memset(tmp, 0, sz);
+ info->backup_start = add_buffer(info, tmp, sz, sz, align,
+ 0, max_addr, 1);
+ reserve(info->backup_start, sz);
+
+ /* On powerpc memory ranges in device-tree is denoted as start
+ * and size rather than start and end, as is the case with
+ * other architectures like i386 . Because of this when loading
+ * the memory ranges in crashdump-elf.c the filesz calculation
+ * [ end - start + 1 ] goes for a toss.
+ *
+ * To be in sync with other archs adjust the end value for
+ * every crash memory range before calling the generic function
+ */
+
+ for (i = 0; i < nr_ranges; i++) {
+ end = crash_memory_range[i].end - 1;
+ crash_memory_range[i].end = end;
+ }
+
+
+#ifdef CONFIG_PPC64
+ /* Create elf header segment and store crash image data. */
+ if (arch_options.core_header_type == CORE_TYPE_ELF64) {
+ if (crash_create_elf64_headers(info, &elf_info64,
+ crash_memory_range, nr_ranges, &tmp,
+ &sz, ELF_CORE_HEADER_ALIGN) < 0)
+ return -1;
+ } else if (crash_create_elf32_headers(info, &elf_info32,
+ crash_memory_range, nr_ranges, &tmp, &sz,
+ ELF_CORE_HEADER_ALIGN) < 0)
+ return -1;
+#else
+ if (crash_create_elf32_headers(info, &elf_info32, crash_memory_range,
+ nr_ranges, &tmp, &sz, ELF_CORE_HEADER_ALIGN)
+ < 0)
+ return -1;
+#endif
+
+ elfcorehdr = add_buffer(info, tmp, sz, sz, align,
+ min_base, max_addr, 1);
+ reserve(elfcorehdr, sz);
+ /* modify and store the cmdline in a global array. This is later
+ * read by flatten_device_tree and modified if required
+ */
+ add_cmdline_param(mod_cmdline, elfcorehdr, " elfcorehdr=", "K");
+ add_cmdline_param(mod_cmdline, saved_max_mem, " savemaxmem=", "M");
+ return 0;
+}
+
+/*
+ * Used to save various memory regions needed for the captured kernel.
+ */
+
+void add_usable_mem_rgns(unsigned long long base, unsigned long long size)
+{
+ int i;
+ unsigned long long end = base + size;
+ unsigned long long ustart, uend;
+
+ base = _ALIGN_DOWN(base, getpagesize());
+ end = _ALIGN_UP(end, getpagesize());
+
+ for (i = 0; i < usablemem_rgns.size; i++) {
+ ustart = usablemem_rgns.ranges[i].start;
+ uend = usablemem_rgns.ranges[i].end;
+ if (base < uend && end > ustart) {
+ if ((base >= ustart) && (end <= uend))
+ return;
+ if (base < ustart && end > uend) {
+ usablemem_rgns.ranges[i].start = base;
+ usablemem_rgns.ranges[i].end = end;
+ return;
+ } else if (base < ustart) {
+ usablemem_rgns.ranges[i].start = base;
+ return;
+ } else if (end > uend) {
+ usablemem_rgns.ranges[i].end = end;
+ return;
+ }
+ }
+ }
+ usablemem_rgns.ranges[usablemem_rgns.size].start = base;
+ usablemem_rgns.ranges[usablemem_rgns.size++].end = end;
+
+#ifdef DEBUG
+ fprintf(stderr, "usable memory rgns size:%u base:%llx size:%llx\n",
+ usablemem_rgns.size, base, size);
+#endif
+}
+
+int is_crashkernel_mem_reserved(void)
+{
+ int fd;
+
+ fd = open("/proc/device-tree/chosen/linux,crashkernel-base", O_RDONLY);
+ if (fd < 0)
+ return 0;
+ close(fd);
+ return 1;
+}
+
diff --git a/kexec/arch/ppc/crashdump-powerpc.h b/kexec/arch/ppc/crashdump-powerpc.h
new file mode 100644
index 0000000..dc2772d
--- /dev/null
+++ b/kexec/arch/ppc/crashdump-powerpc.h
@@ -0,0 +1,38 @@
+#ifndef CRASHDUMP_POWERPC_H
+#define CRASHDUMP_POWERPC_H
+
+struct kexec_info;
+int load_crashdump_segments(struct kexec_info *info, char *mod_cmdline,
+ unsigned long max_addr, unsigned long min_base);
+void add_usable_mem_rgns(unsigned long long base, unsigned long long size);
+
+extern struct arch_options_t arch_options;
+
+#ifdef CONFIG_PPC64
+#define PAGE_OFFSET 0xC000000000000000UL
+#define VMALLOCBASE 0xD000000000000000UL
+#define MAXMEM (-KERNELBASE-VMALLOCBASE)
+#else
+#define PAGE_OFFSET 0xC0000000
+#define MAXMEM 0x30000000 /* Use CONFIG_LOWMEM_SIZE from kernel */
+#endif
+
+#define KERNELBASE PAGE_OFFSET
+#define __pa(x) ((unsigned long)(x)-PAGE_OFFSET)
+
+#define COMMAND_LINE_SIZE 512 /* from kernel */
+/* Backup Region, First 64K of System RAM. */
+#define BACKUP_SRC_START 0x0000
+#define BACKUP_SRC_END 0xffff
+#define BACKUP_SRC_SIZE (BACKUP_SRC_END - BACKUP_SRC_START + 1)
+
+#define KDUMP_BACKUP_LIMIT BACKUP_SRC_SIZE
+#define _ALIGN_UP(addr, size) (((addr)+((size)-1))&(~((size)-1)))
+#define _ALIGN_DOWN(addr, size) ((addr)&(~((size)-1)))
+
+extern unsigned long long crash_base;
+extern unsigned long long crash_size;
+extern unsigned int rtas_base;
+extern unsigned int rtas_size;
+
+#endif /* CRASHDUMP_POWERPC_H */
diff --git a/kexec/arch/ppc/fs2dt.c b/kexec/arch/ppc/fs2dt.c
new file mode 100644
index 0000000..238a3f2
--- /dev/null
+++ b/kexec/arch/ppc/fs2dt.c
@@ -0,0 +1,460 @@
+/*
+ * fs2dt: creates a flattened device-tree
+ *
+ * Copyright (C) 2004,2005 Milton D Miller II, IBM Corporation
+ * Copyright (C) 2005 R Sharada (sharada at in.ibm.com), IBM Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation (version 2 of the License).
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include <fcntl.h>
+#include <dirent.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <stdio.h>
+#include "../../kexec.h"
+#include "kexec-ppc.h"
+
+#define MAXPATH 1024 /* max path name length */
+#define NAMESPACE 16384 /* max bytes for property names */
+#define TREEWORDS 65536 /* max 32 bit words for properties */
+#define MEMRESERVE 256 /* max number of reserved memory blks */
+#define MAX_MEMORY_RANGES 1024
+#define COMMAND_LINE_SIZE 512 /* from kernel */
+
+static char pathname[MAXPATH];
+static char propnames[NAMESPACE] = { 0 };
+static unsigned dtstruct[TREEWORDS], *dt;
+static unsigned long long mem_rsrv[2*MEMRESERVE] = { 0, 0 };
+
+static int crash_param;
+static char local_cmdline[COMMAND_LINE_SIZE] = { "" };
+static unsigned *dt_len; /* changed len of modified cmdline
+ in flat device-tree */
+static struct bootblock bb[1];
+
+void reserve(unsigned long long where, unsigned long long length)
+{
+ size_t offset;
+
+ for (offset = 0; mem_rsrv[offset + 1]; offset += 2)
+ ;
+
+ if (offset + 4 >= 2 * MEMRESERVE)
+ die("unrecoverable error: exhasuted reservation meta data\n");
+
+ mem_rsrv[offset] = where;
+ mem_rsrv[offset + 1] = length;
+ mem_rsrv[offset + 3] = 0; /* N.B: don't care about offset + 2 */
+}
+
+/* look for properties we need to reserve memory space for */
+static void checkprop(char *name, unsigned *data, int len)
+{
+ static unsigned long long base, size, end;
+
+ if ((data == NULL) && (base || size || end))
+ die("unrecoverable error: no property data");
+ else if (!strcmp(name, "linux,rtas-base"))
+ base = *data;
+ else if (!strcmp(name, "linux,tce-base"))
+ base = *(unsigned long long *) data;
+ else if (!strcmp(name, "rtas-size") ||
+ !strcmp(name, "linux,tce-size"))
+ size = *data;
+ else if (reuse_initrd && !strcmp(name, "linux,initrd-start"))
+ if (len == 8)
+ base = *(unsigned long long *) data;
+ else
+ base = *data;
+ else if (reuse_initrd && !strcmp(name, "linux,initrd-end"))
+ end = *(unsigned long long *) data;
+
+ if (size && end)
+ die("unrecoverable error: size and end set at same time\n");
+ if (base && size) {
+ reserve(base, size);
+ base = 0;
+ size = 0;
+ }
+ if (base && end) {
+ reserve(base, end-base);
+ base = 0;
+ end = 0;
+ }
+}
+
+/*
+ * return the property index for a property name, creating a new one
+ * if needed.
+ */
+static unsigned propnum(const char *name)
+{
+ unsigned offset = 0;
+
+ while (propnames[offset])
+ if (strcmp(name, propnames+offset))
+ offset += strlen(propnames+offset)+1;
+ else
+ return offset;
+
+ if (NAMESPACE - offset < strlen(name) + 1)
+ die("unrecoverable error: propnames overrun\n");
+
+ strcpy(propnames+offset, name);
+
+ return offset;
+}
+
+static void add_usable_mem_property(int fd, int len)
+{
+ char fname[MAXPATH], *bname;
+ unsigned long buf[2];
+ unsigned long ranges[2*MAX_MEMORY_RANGES];
+ unsigned long long base, end, loc_base, loc_end;
+ int range, rlen = 0;
+
+ strcpy(fname, pathname);
+ bname = strrchr(fname, '/');
+ bname[0] = '\0';
+ bname = strrchr(fname, '/');
+ if (strncmp(bname, "/memory@", 8) && strcmp(bname, "/memory"))
+ return;
+
+ if (len < 2 * sizeof(unsigned long))
+ die("unrecoverable error: not enough data for mem property\n");
+ len = 2 * sizeof(unsigned long);
+
+ if (lseek(fd, 0, SEEK_SET) < 0)
+ die("unrecoverable error: error seeking in \"%s\": %s\n",
+ pathname, strerror(errno));
+ if (read(fd, buf, len) != len)
+ die("unrecoverable error: error reading \"%s\": %s\n",
+ pathname, strerror(errno));
+
+ if (~0ULL - buf[0] < buf[1])
+ die("unrecoverable error: mem property overflow\n");
+ base = buf[0];
+ end = base + buf[1];
+
+ for (range = 0; range < usablemem_rgns.size; range++) {
+ loc_base = usablemem_rgns.ranges[range].start;
+ loc_end = usablemem_rgns.ranges[range].end;
+ if (loc_base >= base && loc_end <= end) {
+ ranges[rlen++] = loc_base;
+ ranges[rlen++] = loc_end - loc_base;
+ } else if (base < loc_end && end > loc_base) {
+ if (loc_base < base)
+ loc_base = base;
+ if (loc_end > end)
+ loc_end = end;
+ ranges[rlen++] = loc_base;
+ ranges[rlen++] = loc_end - loc_base;
+ }
+ }
+
+ if (!rlen) {
+ /*
+ * User did not pass any ranges for thsi region. Hence, write
+ * (0,0) duple in linux,usable-memory property such that
+ * this region will be ignored.
+ */
+ ranges[rlen++] = 0;
+ ranges[rlen++] = 0;
+ }
+
+ rlen = rlen * sizeof(unsigned long);
+ /*
+ * No add linux,usable-memory property.
+ */
+ *dt++ = 3;
+ *dt++ = rlen;
+ *dt++ = propnum("linux,usable-memory");
+ memcpy(dt, &ranges, rlen);
+ dt += (rlen + 3)/4;
+}
+
+/* put all properties (files) in the property structure */
+static void putprops(char *fn, struct dirent **nlist, int numlist)
+{
+ struct dirent *dp;
+ int i = 0, fd, len;
+ struct stat statbuf;
+
+ for (i = 0; i < numlist; i++) {
+ dp = nlist[i];
+ strcpy(fn, dp->d_name);
+
+ if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
+ continue;
+
+ if (lstat(pathname, &statbuf))
+ die("unrecoverable error: could not stat \"%s\": %s\n",
+ pathname, strerror(errno));
+
+ if (!crash_param && !strcmp(fn, "linux,crashkernel-base"))
+ continue;
+
+ if (!crash_param && !strcmp(fn, "linux,crashkernel-size"))
+ continue;
+
+ /*
+ * This property will be created for each node during kexec
+ * boot. So, ignore it.
+ */
+ if (!strcmp(dp->d_name, "linux,pci-domain") ||
+ !strcmp(dp->d_name, "linux,htab-base") ||
+ !strcmp(dp->d_name, "linux,htab-size") ||
+ !strcmp(dp->d_name, "linux,kernel-end") ||
+ !strcmp(dp->d_name, "linux,usable-memory"))
+ continue;
+
+ /* This property will be created/modified later in putnode()
+ * So ignore it, unless we are reusing the initrd.
+ */
+ if ((!strcmp(dp->d_name, "linux,initrd-start") ||
+ !strcmp(dp->d_name, "linux,initrd-end")) &&
+ !reuse_initrd)
+ continue;
+
+ if (!S_ISREG(statbuf.st_mode))
+ continue;
+
+ len = statbuf.st_size;
+
+ *dt++ = 3;
+ dt_len = dt;
+ *dt++ = len;
+ *dt++ = propnum(fn);
+
+ fd = open(pathname, O_RDONLY);
+ if (fd == -1)
+ die("unrecoverable error: could not open \"%s\": %s\n",
+ pathname, strerror(errno));
+
+ if (read(fd, dt, len) != len)
+ die("unrecoverable error: could not read \"%s\": %s\n",
+ pathname, strerror(errno));
+
+ checkprop(fn, dt, len);
+
+ /* Get the cmdline from the device-tree and modify it */
+ if (!strcmp(dp->d_name, "bootargs")) {
+ int cmd_len;
+ char temp_cmdline[COMMAND_LINE_SIZE] = { "" };
+ char *param = NULL;
+ cmd_len = strlen(local_cmdline);
+ if (cmd_len != 0) {
+ param = strstr(local_cmdline, "crashkernel=");
+ if (param)
+ crash_param = 1;
+ param = strstr(local_cmdline, "root=");
+ }
+ if (!param) {
+ char *old_param;
+ memcpy(temp_cmdline, dt, len);
+ param = strstr(temp_cmdline, "root=");
+ if (param) {
+ old_param = strtok(param, " ");
+ if (cmd_len != 0)
+ strcat(local_cmdline, " ");
+ strcat(local_cmdline, old_param);
+ }
+ }
+ strcat(local_cmdline, " ");
+ cmd_len = strlen(local_cmdline);
+ cmd_len = cmd_len + 1;
+ memcpy(dt, local_cmdline, cmd_len);
+ len = cmd_len;
+ *dt_len = cmd_len;
+#if DEBUG
+ fprintf(stderr, "Modified cmdline:%s\n", local_cmdline);
+#endif
+ }
+
+ dt += (len + 3)/4;
+ if (!strcmp(dp->d_name, "reg") && usablemem_rgns.size)
+ add_usable_mem_property(fd, len);
+ close(fd);
+ }
+
+ fn[0] = '\0';
+ checkprop(pathname, NULL, 0);
+}
+
+/*
+ * Compare function used to sort the device-tree directories
+ * This function will be passed to scandir.
+ */
+static int comparefunc(const void *dentry1, const void *dentry2)
+{
+ char *str1 = (*(struct dirent **)dentry1)->d_name;
+ char *str2 = (*(struct dirent **)dentry2)->d_name;
+
+ /*
+ * strcmp scans from left to right and fails to idetify for some
+ * strings such as memory at 10000000 and memory at f000000.
+ * Therefore, we get the wrong sorted order like memory at 10000000 and
+ * memory at f000000.
+ */
+ if (strchr(str1, '@') && strchr(str2, '@') &&
+ (strlen(str1) > strlen(str2)))
+ return 1;
+
+ return strcmp(str1, str2);
+}
+
+/*
+ * put a node (directory) in the property structure. first properties
+ * then children.
+ */
+static void putnode(void)
+{
+ char *dn;
+ struct dirent *dp;
+ char *basename;
+ struct dirent **namelist;
+ int numlist, i;
+ struct stat statbuf;
+
+ numlist = scandir(pathname, &namelist, 0, comparefunc);
+ if (numlist < 0)
+ die("unrecoverable error: could not scan \"%s\": %s\n",
+ pathname, strerror(errno));
+ if (numlist == 0)
+ die("unrecoverable error: no directory entries in \"%s\"",
+ pathname);
+
+ basename = strrchr(pathname, '/') + 1;
+
+ *dt++ = 1;
+ strcpy((void *)dt, *basename ? basename : "");
+ dt += strlen((void *)dt) / sizeof(unsigned) + 1;
+
+ strcat(pathname, "/");
+ dn = pathname + strlen(pathname);
+
+ putprops(dn, namelist, numlist);
+
+ /* Add initrd entries to the second kernel */
+ if (initrd_base && !strcmp(basename, "chosen/")) {
+ int len = 8;
+ unsigned long long initrd_end;
+ *dt++ = 3;
+ *dt++ = len;
+ *dt++ = propnum("linux,initrd-start");
+
+ memcpy(dt, &initrd_base, len);
+ dt += (len + 3)/4;
+
+ len = 8;
+ *dt++ = 3;
+ *dt++ = len;
+ *dt++ = propnum("linux,initrd-end");
+
+ initrd_end = initrd_base + initrd_size;
+
+ memcpy(dt, &initrd_end, len);
+ dt += (len + 3)/4;
+
+ reserve(initrd_base, initrd_size);
+ }
+
+ for (i = 0; i < numlist; i++) {
+ dp = namelist[i];
+ strcpy(dn, dp->d_name);
+ free(namelist[i]);
+
+ if (!strcmp(dn, ".") || !strcmp(dn, ".."))
+ continue;
+
+ if (lstat(pathname, &statbuf))
+ die("unrecoverable error: could not stat \"%s\": %s\n",
+ pathname, strerror(errno));
+
+ if (S_ISDIR(statbuf.st_mode))
+ putnode();
+ }
+
+ *dt++ = 2;
+ dn[-1] = '\0';
+ free(namelist);
+}
+
+int create_flatten_tree(struct kexec_info *info, unsigned char **bufp,
+ unsigned long *sizep, char *cmdline)
+{
+ unsigned long len;
+ unsigned long tlen;
+ unsigned char *buf;
+ unsigned long me;
+
+ me = 0;
+
+ strcpy(pathname, "/proc/device-tree/");
+
+ dt = dtstruct;
+
+ if (cmdline)
+ strcpy(local_cmdline, cmdline);
+
+ putnode();
+ *dt++ = 9;
+
+ len = sizeof(bb[0]);
+ len += 7; len &= ~7;
+
+ bb->off_mem_rsvmap = len;
+
+ for (len = 1; mem_rsrv[len]; len += 2)
+ ;
+ len += 3;
+ len *= sizeof(mem_rsrv[0]);
+
+ bb->off_dt_struct = bb->off_mem_rsvmap + len;
+
+ len = dt - dtstruct;
+ len *= sizeof(unsigned);
+ bb->dt_struct_size = len;
+ bb->off_dt_strings = bb->off_dt_struct + len;
+
+ len = propnum("");
+ bb->dt_strings_size = len;
+ len += 3; len &= ~3;
+ bb->totalsize = bb->off_dt_strings + len;
+
+ bb->magic = 0xd00dfeed;
+ bb->version = 17;
+ bb->last_comp_version = 16;
+
+ reserve(me, bb->totalsize); /* patched later in kexec_load */
+
+ buf = (unsigned char *) malloc(bb->totalsize);
+ *bufp = buf;
+ memcpy(buf, bb, bb->off_mem_rsvmap);
+ tlen = bb->off_mem_rsvmap;
+ memcpy(buf+tlen, mem_rsrv, bb->off_dt_struct - bb->off_mem_rsvmap);
+ tlen = tlen + (bb->off_dt_struct - bb->off_mem_rsvmap);
+ memcpy(buf+tlen, dtstruct, bb->off_dt_strings - bb->off_dt_struct);
+ tlen = tlen + (bb->off_dt_strings - bb->off_dt_struct);
+ memcpy(buf+tlen, propnames, bb->totalsize - bb->off_dt_strings);
+ tlen = tlen + bb->totalsize - bb->off_dt_strings;
+ *sizep = tlen;
+ return 0;
+}
diff --git a/kexec/arch/ppc/kexec-elf-ppc.c b/kexec/arch/ppc/kexec-elf-ppc.c
index a54a5d5..4bcac26 100644
--- a/kexec/arch/ppc/kexec-elf-ppc.c
+++ b/kexec/arch/ppc/kexec-elf-ppc.c
@@ -11,6 +11,7 @@
#include <string.h>
#include <stdlib.h>
#include <errno.h>
+#include <limits.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
@@ -23,15 +24,22 @@
#include "../../kexec-elf.h"
#include "kexec-ppc.h"
#include <arch/options.h>
+#include "../../kexec-syscall.h"
+#include "crashdump-powerpc.h"
#include "config.h"
#include "fixup_dtb.h"
static const int probe_debug = 0;
-#define MAX_COMMAND_LINE 256
+unsigned long long initrd_base, initrd_size;
+unsigned char reuse_initrd;
+const char *ramdisk;
+int create_flatten_tree(struct kexec_info *, unsigned char **, unsigned long *,
+ char *);
#define UPSZ(X) ((sizeof(X) + 3) & ~3)
+#ifdef WITH_GAMECUBE
static struct boot_notes {
Elf_Bhdr hdr;
Elf_Nhdr bl_hdr;
@@ -65,7 +73,7 @@ static struct boot_notes {
.n_type = EBN_COMMAND_LINE,
},
};
-
+#endif
int elf_ppc_probe(const char *buf, off_t len)
{
@@ -92,6 +100,7 @@ int elf_ppc_probe(const char *buf, off_t len)
return result;
}
+#ifdef WITH_GAMECUBE
static void gamecube_hack_addresses(struct mem_ehdr *ehdr)
{
struct mem_phdr *phdr, *phdr_end;
@@ -112,6 +121,7 @@ static void gamecube_hack_addresses(struct mem_ehdr *ehdr)
phdr->p_paddr &= ~0xf0000000; /* clear bits 0-3, ibm syntax */
}
}
+#endif
#define OPT_APPEND (OPT_ARCH_MAX+0)
#define OPT_GAMECUBE (OPT_ARCH_MAX+1)
@@ -145,10 +155,24 @@ int elf_ppc_load(int argc, char **argv, const char *buf, off_t len,
struct kexec_info *info)
{
struct mem_ehdr ehdr;
- char *command_line;
+ char *command_line, *crash_cmdline, *cmdline_buf;
int command_line_len;
char *dtb;
int result;
+ unsigned long max_addr, hole_addr;
+ struct mem_phdr *phdr;
+ size_t size;
+ unsigned long long *rsvmap_ptr;
+ struct bootblock *bb_ptr;
+ unsigned int nr_segments;
+ unsigned long my_kernel, my_dt_offset;
+ unsigned long my_stack, my_backup_start;
+#ifdef CONFIG_PPC64
+ unsigned long toc_addr;
+#endif
+ unsigned int slave_code[256 / sizeof(unsigned int)], master_entry;
+ unsigned char *seg_buf = NULL;
+ off_t seg_size = 0;
#ifdef WITH_GAMECUBE
int target_is_gamecube = 1;
char *arg_buf;
@@ -170,6 +194,9 @@ int elf_ppc_load(int argc, char **argv, const char *buf, off_t len,
command_line = NULL;
dtb = NULL;
+ max_addr = LONG_MAX;
+ hole_addr = 0;
+
while ((opt = getopt_long(argc, argv, short_options, options, 0)) != -1) {
switch (opt) {
default:
@@ -209,15 +236,45 @@ int elf_ppc_load(int argc, char **argv, const char *buf, off_t len,
fixup_nodes[cur_fixup] = NULL;
+ /* Need to append some command line parameters internally in case of
+ * taking crash dumps.
+ */
+ if (info->kexec_flags & KEXEC_ON_CRASH) {
+ crash_cmdline = xmalloc(COMMAND_LINE_SIZE);
+ memset((void *)crash_cmdline, 0, COMMAND_LINE_SIZE);
+ } else
+ crash_cmdline = NULL;
+
/* Parse the Elf file */
result = build_elf_exec_info(buf, len, &ehdr, 0);
if (result < 0) {
free_elf_info(&ehdr);
return result;
}
+
+#ifdef WITH_GAMECUBE
if (target_is_gamecube) {
gamecube_hack_addresses(&ehdr);
}
+#endif
+
+ /* Load the Elf data. Physical load addresses in elf64 header do not
+ * show up correctly. Use user supplied address for now to patch the
+ * elf header
+ */
+
+ phdr = &ehdr.e_phdr[0];
+ size = phdr->p_filesz;
+ if (size > phdr->p_memsz)
+ size = phdr->p_memsz;
+
+ hole_addr = locate_hole(info, size, 0, 0, max_addr, 1);
+#ifdef CONFIG_PPC64
+ ehdr.e_phdr[0].p_paddr = (Elf64_Addr)hole_addr;
+#else
+ ehdr.e_phdr[0].p_paddr = hole_addr;
+#endif
+
/* Load the Elf data */
result = elf_exec_load(&ehdr, info);
if (result < 0) {
@@ -225,6 +282,27 @@ int elf_ppc_load(int argc, char **argv, const char *buf, off_t len,
return result;
}
+ /* If panic kernel is being loaded, additional segments need
+ * to be created.
+ */
+ if (info->kexec_flags & KEXEC_ON_CRASH) {
+ result = load_crashdump_segments(info, crash_cmdline,
+ max_addr, 0);
+ if (result < 0) {
+ free(crash_cmdline);
+ return -1;
+ }
+ }
+
+ cmdline_buf = xmalloc(COMMAND_LINE_SIZE);
+ memset((void *)cmdline_buf, 0, COMMAND_LINE_SIZE);
+ if (command_line)
+ strncat(cmdline_buf, command_line, command_line_len);
+ if (crash_cmdline)
+ strncat(cmdline_buf, crash_cmdline,
+ sizeof(crash_cmdline) -
+ strlen(crash_cmdline) - 1);
+
/*
* In case of a toy we take the hardcoded things and an easy setup via
* one of the assembly startups. Every thing else should be grown up
@@ -269,31 +347,105 @@ int elf_ppc_load(int argc, char **argv, const char *buf, off_t len,
blob_buf = slurp_file(dtb, &blob_size);
if (!blob_buf || !blob_size)
die("Device tree seems to be an empty file.\n");
- blob_buf = fixup_dtb_nodes(blob_buf, &blob_size, fixup_nodes, command_line);
+ blob_buf = fixup_dtb_nodes(blob_buf, &blob_size, fixup_nodes,
+ cmdline_buf);
dtb_addr = add_buffer(info, blob_buf, blob_size, blob_size, 0, 0,
KERNEL_ACCESS_TOP, -1);
} else {
- dtb_addr = 0;
+ /* create from fs2dt */
+ seg_buf = NULL;
+ seg_size = 0;
+ create_flatten_tree(info, (unsigned char **)&seg_buf,
+ (unsigned long *)&seg_size, cmdline_buf);
+ add_buffer(info, seg_buf, seg_size, seg_size,
+#ifdef CONFIG_PPC64
+ 0, 0, max_addr, -1);
+#else
+ /* load dev tree at 16 Mb offset from kernel load address */
+ 0, 0, ehdr.e_phdr[0].p_paddr + SIZE_16M, -1);
+#endif
}
- /* set various variables for the purgatory */
- addr = ehdr.e_entry;
- elf_rel_set_symbol(&info->rhdr, "kernel", &addr, sizeof(addr));
- addr = dtb_addr;
- elf_rel_set_symbol(&info->rhdr, "dt_offset", &addr, sizeof(addr));
+ if (dtb) {
+ /* set various variables for the purgatory */
+ addr = ehdr.e_entry;
+ elf_rel_set_symbol(&info->rhdr, "kernel", &addr, sizeof(addr));
+
+ addr = dtb_addr;
+ elf_rel_set_symbol(&info->rhdr, "dt_offset",
+ &addr, sizeof(addr));
- addr = rmo_top;
- elf_rel_set_symbol(&info->rhdr, "mem_size", &addr, sizeof(addr));
+ addr = rmo_top;
+
+ elf_rel_set_symbol(&info->rhdr, "mem_size",
+ &addr, sizeof(addr));
#define PUL_STACK_SIZE (16 * 1024)
- addr = locate_hole(info, PUL_STACK_SIZE, 0, 0, elf_max_addr(&ehdr), 1);
- addr += PUL_STACK_SIZE;
- elf_rel_set_symbol(&info->rhdr, "pul_stack", &addr, sizeof(addr));
+ addr = locate_hole(info, PUL_STACK_SIZE, 0, 0,
+ elf_max_addr(&ehdr), 1);
+ addr += PUL_STACK_SIZE;
+ elf_rel_set_symbol(&info->rhdr, "stack", &addr, sizeof(addr));
#undef PUL_STACK_SIZE
- addr = elf_rel_get_addr(&info->rhdr, "purgatory_start");
- info->entry = (void *)addr;
+ addr = elf_rel_get_addr(&info->rhdr, "purgatory_start");
+ info->entry = (void *)addr;
+
+ } else { /*from fs2dt*/
+
+ /* patch reserve map address for flattened device-tree
+ * find last entry (both 0) in the reserve mem list. Assume DT
+ * entry is before this one
+ */
+ bb_ptr = (struct bootblock *)(
+ (unsigned char *)info->segment[(info->nr_segments) -
+ 1].buf);
+ rsvmap_ptr = (unsigned long long *)(
+ (unsigned char *)info->segment[(info->nr_segments) -
+ 1].buf + bb_ptr->off_mem_rsvmap);
+ while (*rsvmap_ptr || *(rsvmap_ptr + 1))
+ rsvmap_ptr += 2;
+ rsvmap_ptr -= 2;
+ *rsvmap_ptr = (unsigned long)(
+ info->segment[(info->nr_segments)-1].mem);
+ rsvmap_ptr++;
+ *rsvmap_ptr = (unsigned long long)bb_ptr->totalsize;
+
+ nr_segments = info->nr_segments;
+
+ /* Set kernel */
+ my_kernel = (unsigned long)info->segment[0].mem;
+ elf_rel_set_symbol(&info->rhdr, "kernel", &my_kernel,
+ sizeof(my_kernel));
+
+ /* Set dt_offset */
+ my_dt_offset = (unsigned long)info->segment[nr_segments -
+ 1].mem;
+ elf_rel_set_symbol(&info->rhdr, "dt_offset", &my_dt_offset,
+ sizeof(my_dt_offset));
+
+ /* get slave code from new kernel, put in purgatory */
+ elf_rel_get_symbol(&info->rhdr, "purgatory_start", slave_code,
+ sizeof(slave_code));
+ master_entry = slave_code[0];
+ memcpy(slave_code, info->segment[0].buf, sizeof(slave_code));
+ slave_code[0] = master_entry;
+ elf_rel_set_symbol(&info->rhdr, "purgatory_start", slave_code,
+ sizeof(slave_code));
+
+ /* Set stack address */
+ my_stack = locate_hole(info, 16*1024, 0, 0, max_addr, 1);
+ my_stack += 16*1024;
+ elf_rel_set_symbol(&info->rhdr, "stack", &my_stack,
+ sizeof(my_stack));
+ }
+
+ if (info->kexec_flags & KEXEC_ON_CRASH) {
+ /* Set backup address */
+ my_backup_start = info->backup_start;
+ elf_rel_set_symbol(&info->rhdr, "backup_start",
+ &my_backup_start, sizeof(my_backup_start));
+ }
#endif
return 0;
}
diff --git a/kexec/arch/ppc/kexec-ppc.c b/kexec/arch/ppc/kexec-ppc.c
index f552d79..aabc02f 100644
--- a/kexec/arch/ppc/kexec-ppc.c
+++ b/kexec/arch/ppc/kexec-ppc.c
@@ -21,6 +21,7 @@
#include "../../kexec.h"
#include "../../kexec-syscall.h"
#include "kexec-ppc.h"
+#include "crashdump-powerpc.h"
#include <arch/options.h>
#include "config.h"
@@ -45,13 +46,14 @@ static int get_memory_ranges_gc(struct memory_range **range, int *ranges,
}
#else
static int use_new_dtb;
-static int max_memory_ranges;
+int max_memory_ranges;
static int nr_memory_ranges, nr_exclude_ranges;
static struct memory_range *exclude_range;
static struct memory_range *memory_range;
static struct memory_range *base_memory_range;
static uint64_t memory_max;
uint64_t rmo_top;
+unsigned long long crash_base, crash_size;
unsigned int rtas_base, rtas_size;
/*
@@ -174,7 +176,40 @@ static int sort_base_ranges(void)
#define MAXBYTES 128
-/* Get base memory ranges */
+static int realloc_memory_ranges(void)
+{
+ size_t memory_range_len;
+
+ max_memory_ranges++;
+ memory_range_len = sizeof(struct memory_range) * max_memory_ranges;
+
+ memory_range = (struct memory_range *) malloc(memory_range_len);
+ if (!memory_range)
+ goto err;
+
+ base_memory_range = (struct memory_range *) realloc(memory_range,
+ memory_range_len);
+ if (!base_memory_range)
+ goto err;
+
+ exclude_range = (struct memory_range *) realloc(exclude_range,
+ memory_range_len);
+ if (!exclude_range)
+ goto err;
+
+ usablemem_rgns.ranges = (struct memory_range *)
+ realloc(usablemem_rgns.ranges,
+ memory_range_len);
+ if (!(usablemem_rgns.ranges))
+ goto err;
+
+ return 0;
+
+err:
+ fprintf(stderr, "memory range structure re-allocation failure\n");
+ return -1;
+}
+
static int get_base_ranges(void)
{
int local_memory_ranges = 0;
@@ -219,8 +254,10 @@ static int get_base_ranges(void)
return -1;
}
if (local_memory_ranges >= max_memory_ranges) {
- fclose(file);
- break;
+ if (realloc_memory_ranges() < 0){
+ - fclose(file);
+ break;
+ }
}
base_memory_range[local_memory_ranges].start =
((uint32_t *)buf)[0];
@@ -250,16 +287,23 @@ static int get_base_ranges(void)
/* Get devtree details and create exclude_range array
* Also create usablemem_ranges for KEXEC_ON_CRASH
*/
-static int get_devtree_details(unsigned long UNUSED(kexec_flags))
+static int get_devtree_details(unsigned long kexec_flags)
{
uint64_t rmo_base;
- char buf[MAXBYTES];
+ unsigned long long tce_base;
+ unsigned int tce_size;
+ unsigned long long htab_base, htab_size;
+ unsigned long long kernel_end;
+ unsigned long long initrd_start, initrd_end;
+ char buf[MAXBYTES-1];
char device_tree[256] = "/proc/device-tree/";
char fname[256];
DIR *dir, *cdir;
FILE *file;
struct dirent *dentry;
+ struct stat fstat;
int n, i = 0;
+ unsigned long tmp_long;
if ((dir = opendir(device_tree)) == NULL) {
perror(device_tree);
@@ -269,10 +313,10 @@ static int get_devtree_details(unsigned long UNUSED(kexec_flags))
while ((dentry = readdir(dir)) != NULL) {
if (strncmp(dentry->d_name, "chosen", 6) &&
strncmp(dentry->d_name, "memory@", 7) &&
- strcmp(dentry->d_name, "memory") &&
+ strncmp(dentry->d_name, "memory", 6) &&
+ strncmp(dentry->d_name, "pci@", 4) &&
strncmp(dentry->d_name, "rtas", 4))
continue;
-
strcpy(fname, device_tree);
strcat(fname, dentry->d_name);
if ((cdir = opendir(fname)) == NULL) {
@@ -280,13 +324,172 @@ static int get_devtree_details(unsigned long UNUSED(kexec_flags))
goto error_opendir;
}
+ if (strncmp(dentry->d_name, "chosen", 6) == 0) {
+ strcat(fname, "/linux,kernel-end");
+ file = fopen(fname, "r");
+ if (!file) {
+ perror(fname);
+ goto error_opencdir;
+ }
+ if (fread(&tmp_long, sizeof(unsigned long), 1, file)
+ != 1) {
+ perror(fname);
+ goto error_openfile;
+ }
+ kernel_end = tmp_long;
+ fclose(file);
+
+ /* Add kernel memory to exclude_range */
+ exclude_range[i].start = 0x0UL;
+ exclude_range[i].end = kernel_end;
+ i++;
+ if (i >= max_memory_ranges)
+ realloc_memory_ranges();
+ if (kexec_flags & KEXEC_ON_CRASH) {
+ memset(fname, 0, sizeof(fname));
+ strcpy(fname, device_tree);
+ strcat(fname, dentry->d_name);
+ strcat(fname, "/linux,crashkernel-base");
+ file = fopen(fname, "r");
+ if (!file) {
+ perror(fname);
+ goto error_opencdir;
+ }
+ if (fread(&tmp_long, sizeof(unsigned long), 1,
+ file) != 1) {
+ perror(fname);
+ goto error_openfile;
+ }
+ crash_base = tmp_long;
+ fclose(file);
+
+ memset(fname, 0, sizeof(fname));
+ strcpy(fname, device_tree);
+ strcat(fname, dentry->d_name);
+ strcat(fname, "/linux,crashkernel-size");
+ file = fopen(fname, "r");
+ if (!file) {
+ perror(fname);
+ goto error_opencdir;
+ }
+ if (fread(&tmp_long, sizeof(unsigned long), 1,
+ file) != 1) {
+ perror(fname);
+ goto error_openfile;
+ }
+ crash_size = tmp_long;
+
+ if (crash_base > mem_min)
+ mem_min = crash_base;
+ if (crash_base + crash_size < mem_max)
+ mem_max = crash_base + crash_size;
+
+ add_usable_mem_rgns(0, crash_base + crash_size);
+ reserve(KDUMP_BACKUP_LIMIT,
+ crash_base-KDUMP_BACKUP_LIMIT);
+ }
+ memset(fname, 0, sizeof(fname));
+ strcpy(fname, device_tree);
+ strcat(fname, dentry->d_name);
+ strcat(fname, "/linux,htab-base");
+ file = fopen(fname, "r");
+ if (!file) {
+ closedir(cdir);
+ if (errno == ENOENT) {
+ /* Non LPAR */
+ errno = 0;
+ continue;
+ }
+ perror(fname);
+ goto error_opendir;
+ }
+ if (fread(&htab_base, sizeof(unsigned long), 1, file)
+ != 1) {
+ perror(fname);
+ goto error_openfile;
+ }
+ memset(fname, 0, sizeof(fname));
+ strcpy(fname, device_tree);
+ strcat(fname, dentry->d_name);
+ strcat(fname, "/linux,htab-size");
+ file = fopen(fname, "r");
+ if (!file) {
+ perror(fname);
+ goto error_opencdir;
+ }
+ if (fread(&htab_size, sizeof(unsigned long), 1, file)
+ != 1) {
+ perror(fname);
+ goto error_openfile;
+ }
+ /* Add htab address to exclude_range - NON-LPAR only */
+ exclude_range[i].start = htab_base;
+ exclude_range[i].end = htab_base + htab_size;
+ i++;
+ if (i >= max_memory_ranges)
+ realloc_memory_ranges();
+
+ /* reserve the initrd_start and end locations. */
+ if (reuse_initrd) {
+ memset(fname, 0, sizeof(fname));
+ strcpy(fname, device_tree);
+ strcat(fname, dentry->d_name);
+ strcat(fname, "/linux,initrd-start");
+ file = fopen(fname, "r");
+ if (!file) {
+ perror(fname);
+ goto error_opencdir;
+ }
+ /* check for 4 and 8 byte initrd offset sizes */
+ if (stat(fname, &fstat) != 0) {
+ perror(fname);
+ goto error_openfile;
+ }
+ if (fread(&initrd_start, fstat.st_size, 1, file)
+ != 1) {
+ perror(fname);
+ goto error_openfile;
+ }
+ fclose(file);
+
+ memset(fname, 0, sizeof(fname));
+ strcpy(fname, device_tree);
+ strcat(fname, dentry->d_name);
+ strcat(fname, "/linux,initrd-end");
+ file = fopen(fname, "r");
+ if (!file) {
+ perror(fname);
+ goto error_opencdir;
+ }
+ /* check for 4 and 8 byte initrd offset sizes */
+ if (stat(fname, &fstat) != 0) {
+ perror(fname);
+ goto error_openfile;
+ }
+ if (fread(&initrd_end, fstat.st_size, 1, file)
+ != 1) {
+ perror(fname);
+ goto error_openfile;
+ }
+ fclose(file);
+
+ /* Add initrd address to exclude_range */
+ exclude_range[i].start = initrd_start;
+ exclude_range[i].end = initrd_end;
+ i++;
+ if (i >= max_memory_ranges)
+ realloc_memory_ranges();
+ }
+ } /* chosen */
+
if (strncmp(dentry->d_name, "rtas", 4) == 0) {
strcat(fname, "/linux,rtas-base");
if ((file = fopen(fname, "r")) == NULL) {
perror(fname);
goto error_opencdir;
}
- if (fread(&rtas_base, sizeof(unsigned int), 1, file) != 1) {
+ if (fread(&rtas_base, sizeof(unsigned int), 1, file)
+ != 1) {
perror(fname);
goto error_openfile;
}
@@ -298,7 +501,8 @@ static int get_devtree_details(unsigned long UNUSED(kexec_flags))
perror(fname);
goto error_opencdir;
}
- if (fread(&rtas_size, sizeof(unsigned int), 1, file) != 1) {
+ if (fread(&rtas_size, sizeof(unsigned int), 1, file)
+ != 1) {
perror(fname);
goto error_openfile;
}
@@ -307,6 +511,8 @@ static int get_devtree_details(unsigned long UNUSED(kexec_flags))
exclude_range[i].start = rtas_base;
exclude_range[i].end = rtas_base + rtas_size;
i++;
+ if (kexec_flags & KEXEC_ON_CRASH)
+ add_usable_mem_rgns(rtas_base, rtas_size);
} /* rtas */
if (!strncmp(dentry->d_name, "memory@", 7) ||
@@ -336,6 +542,48 @@ static int get_devtree_details(unsigned long UNUSED(kexec_flags))
fclose(file);
closedir(cdir);
} /* memory */
+
+ if (strncmp(dentry->d_name, "pci@", 4) == 0) {
+ strcat(fname, "/linux,tce-base");
+ file = fopen(fname, "r");
+ if (!file) {
+ closedir(cdir);
+ if (errno == ENOENT) {
+ /* Non LPAR */
+ errno = 0;
+ continue;
+ }
+ perror(fname);
+ goto error_opendir;
+ }
+ if (fread(&tce_base, sizeof(unsigned long), 1, file)
+ != 1) {
+ perror(fname);
+ goto error_openfile;
+ return -1;
+ }
+ memset(fname, 0, sizeof(fname));
+ strcpy(fname, device_tree);
+ strcat(fname, dentry->d_name);
+ strcat(fname, "/linux,tce-size");
+ file = fopen(fname, "r");
+ if (!file) {
+ perror(fname);
+ goto error_opencdir;
+ }
+ if (fread(&tce_size, sizeof(unsigned int), 1, file)
+ != 1) {
+ perror(fname);
+ goto error_openfile;
+ }
+ /* Add tce to exclude_range - NON-LPAR only */
+ exclude_range[i].start = tce_base;
+ exclude_range[i].end = tce_base + tce_size;
+ i++;
+ if (kexec_flags & KEXEC_ON_CRASH)
+ add_usable_mem_rgns(tce_base, tce_size);
+ closedir(cdir);
+ } /* pci */
}
closedir(dir);
@@ -347,8 +595,8 @@ static int get_devtree_details(unsigned long UNUSED(kexec_flags))
int k;
for (k = 0; k < i; k++)
fprintf(stderr, "exclude_range sorted exclude_range[%d] "
- "start:%llx, end:%llx\n", k, exclude_range[k].start,
- exclude_range[k].end);
+ "start:%llx, end:%llx\n", k, exclude_range[k].start,
+ exclude_range[k].end);
#endif
return 0;
@@ -532,7 +780,3 @@ void arch_update_purgatory(struct kexec_info *UNUSED(info))
{
}
-int is_crashkernel_mem_reserved(void)
-{
- return 0; /* kdump is not supported on this platform (yet) */
-}
diff --git a/kexec/arch/ppc/kexec-ppc.h b/kexec/arch/ppc/kexec-ppc.h
index 6cec467..fc0471f 100644
--- a/kexec/arch/ppc/kexec-ppc.h
+++ b/kexec/arch/ppc/kexec-ppc.h
@@ -1,6 +1,11 @@
#ifndef KEXEC_PPC_H
#define KEXEC_PPC_H
+#define MAXBYTES 128
+#define MAX_LINE 160
+#define CORE_TYPE_ELF32 1
+#define CORE_TYPE_ELF64 2
+
extern unsigned char setup_simple_start[];
extern uint32_t setup_simple_size;
@@ -16,6 +21,8 @@ extern struct {
uint32_t spr8;
} setup_dol_regs;
+#define SIZE_16M (16*1024*1024UL)
+
int elf_ppc_probe(const char *buf, off_t len);
int elf_ppc_load(int argc, char **argv, const char *buf, off_t len,
struct kexec_info *info);
@@ -37,4 +44,29 @@ void dol_ppc_usage(void);
*/
#define KERNEL_ACCESS_TOP (24 * 1024 * 1024)
+/* boot block version 17 as defined by the linux kernel */
+struct bootblock {
+ unsigned magic,
+ totalsize,
+ off_dt_struct,
+ off_dt_strings,
+ off_mem_rsvmap,
+ version,
+ last_comp_version,
+ boot_physid,
+ dt_strings_size,
+ dt_struct_size;
+};
+
+typedef struct mem_rgns {
+ unsigned int size;
+ struct memory_range *ranges;
+} mem_rgns_t;
+extern mem_rgns_t usablemem_rgns;
+extern int max_memory_ranges;
+extern unsigned long long initrd_base, initrd_size;
+extern unsigned char reuse_initrd;
+#define COMMAND_LINE_SIZE 512 /* from kernel */
+/*fs2dt*/
+void reserve(unsigned long long where, unsigned long long length);
#endif /* KEXEC_PPC_H */
diff --git a/purgatory/arch/ppc/Makefile b/purgatory/arch/ppc/Makefile
index 0dd18b6..72289a0 100644
--- a/purgatory/arch/ppc/Makefile
+++ b/purgatory/arch/ppc/Makefile
@@ -2,7 +2,7 @@
# Purgatory ppc
#
-ppc_PURGATORY_SRCS += purgatory/arch/ppc/v2wrap.S
+ppc_PURGATORY_SRCS += purgatory/arch/ppc/v2wrap_32.S
ppc_PURGATORY_SRCS += purgatory/arch/ppc/misc.S
ppc_PURGATORY_SRCS += purgatory/arch/ppc/purgatory-ppc.c
ppc_PURGATORY_SRCS += purgatory/arch/ppc/console-ppc.c
diff --git a/purgatory/arch/ppc/purgatory-ppc.c b/purgatory/arch/ppc/purgatory-ppc.c
index 01d0f38..3d7d484 100644
--- a/purgatory/arch/ppc/purgatory-ppc.c
+++ b/purgatory/arch/ppc/purgatory-ppc.c
@@ -1,19 +1,41 @@
+/*
+ * kexec: Linux boots Linux
+ *
+ * Created by: Mohan Kumar M (mohan at in.ibm.com)
+ *
+ * Copyright (C) IBM Corporation, 2005. All rights reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation (version 2 of the License).
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
#include <purgatory.h>
#include "purgatory-ppc.h"
-unsigned int pul_stack = 0;
-unsigned int dt_offset = 0;
-unsigned int kernel = 0;
-unsigned int epapr_magic = 0;
-unsigned int mem_size = 0;
+unsigned int panic_kernel = 0;
+unsigned long backup_start = 0;
+unsigned long stack = 0;
+unsigned long dt_offset = 0;
+unsigned long my_toc = 0;
+unsigned long kernel = 0;
void setup_arch(void)
{
- /* Nothing for now */
+ return;
}
-/* This function can be used to execute after the SHA256 verification. */
void post_verification_setup_arch(void)
{
- /* Nothing for now */
+ if (panic_kernel)
+ crashdump_backup_memory();
}
diff --git a/purgatory/arch/ppc/purgatory-ppc.h b/purgatory/arch/ppc/purgatory-ppc.h
index e931cae..7eff8aa 100644
--- a/purgatory/arch/ppc/purgatory-ppc.h
+++ b/purgatory/arch/ppc/purgatory-ppc.h
@@ -1,6 +1,6 @@
#ifndef PURGATORY_PPC_H
#define PURGATORY_PPC_H
-/* nothing yet */
-
+void crashdump_backup_memory(void);
+void post_verification_setup_arch(void);
#endif /* PURGATORY_PPC_H */
diff --git a/purgatory/arch/ppc/v2wrap.S b/purgatory/arch/ppc/v2wrap.S
deleted file mode 100644
index 79d188f..0000000
--- a/purgatory/arch/ppc/v2wrap.S
+++ /dev/null
@@ -1,66 +0,0 @@
-#
-# kexec: Linux boots Linux
-#
-# Copyright (C) 2004 - 2005, Milton D Miller II, IBM Corporation
-# Copyright (C) 2006, Mohan Kumar M (mohan at in.ibm.com), IBM Corporation
-# Copyright (C) 2008, Sebastian Andrzej Siewior (bigeasy at linutronix.de), linutronix
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation (version 2 of the License).
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-#
-
-#include "ppc_asm.h"
-
-# v2wrap.S
-# a wrapper to call purgatory code
-# Invokes ppc kernel with the arguments according to ePAPR v1.0
-# It assumes that the MSR is allready correct.
-
-# calling convention:
-# no register are considred
-#
-
-#define LOADADDR(rn,name) \
- lis rn,name##@h; \
- ori rn,rn,name##@l; \
-
- .globl purgatory_start
-purgatory_start:
-
- LOADADDR(r6,pul_stack)
- lwz r1,0(r6) #setup stack
-
- subi r1, r1, 112
- bl purgatory
- nop
-
- LOADADDR(r6,kernel)
- lwz r4,0(r6) # load the kernel address
- mtlr r4 # prepare branch too
-
- LOADADDR(r6, dt_offset)
- lwz r3, 0(r6) # load device-tree address
-
- li r4, 0
- li r5, 0
-
- LOADADDR(r6, epapr_magic) # ePAPR magic value
- lwz r6, 0(r6)
-
- LOADADDR(r7, mem_size) # the Initial Mapped Area
- lwz r7, 0(r6)
-
- li r8, 0
- li r9, 0
-
- blr # start kernel
diff --git a/purgatory/arch/ppc/v2wrap_32.S b/purgatory/arch/ppc/v2wrap_32.S
new file mode 100644
index 0000000..8442d16
--- /dev/null
+++ b/purgatory/arch/ppc/v2wrap_32.S
@@ -0,0 +1,91 @@
+#
+# kexec: Linux boots Linux
+#
+# Copyright (C) 2004 - 2005, Milton D Miller II, IBM Corporation
+# Copyright (C) 2006, Mohan Kumar M (mohan at in.ibm.com), IBM Corporation
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation (version 2 of the License).
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+#
+
+# v2wrap.S
+# a wrapper to call purgatory code to backup first
+# 32kB of first kernel into the backup region
+# reserved by kexec-tools.
+# Invokes powerpc kernel with the expected arguments
+# of kernel(device-tree, phys-offset, 0)
+
+#
+# calling convention:
+# r3 = physical number of this cpu (all cpus)
+# r4 = address of this chunk (master only)
+# master enters at purgatory_start (aka first byte of this chunk)
+# slaves (additional cpus), if any, enter a copy of the
+# first 0x100 bytes of this code relocated to 0x0
+#
+# in other words,
+# a copy of the first 0x100 bytes of this code is copied to 0
+# and the slaves are sent to address 0x60
+# with r3 = their physical cpu number.
+
+ .globl purgatory_start
+purgatory_start: b master
+ .org purgatory_start + 0x60 # ABI: slaves start at 60 with r3=phys
+slave: b $
+ .org purgatory_start + 0x100 # ABI: end of copied region
+ .size purgatory_start, . - purgatory_start
+
+#
+# The above 0x100 bytes at purgatory_start are replaced with the
+# code from the kernel (or next stage) by kexec/arch/powerpc/kexec-powerpc.c
+#
+
+master:
+ or 1,1,1 # low priority to let other threads catchup
+ isync
+ mr 17,3 # save cpu id to r17
+ mr 15,4 # save physical address in reg15
+
+ lis 6,stack at h
+ ori 6,6,stack at l
+ lwz 1,0(6) #setup stack
+
+ subi 1,1,112
+ bl purgatory
+ nop
+
+ or 3,3,3 # ok now to high priority, lets boot
+ lis 6,0x1
+ mtctr 6 # delay a bit for slaves to catch up
+83: bdnz 83b # before we overwrite 0-100 again
+
+ lis 6,dt_offset at h
+ ori 6,6,dt_offset at l
+ lwz 3,0(6) # load device-tree address
+ lwz 6,20(3) # fetch version number
+ cmpwi 0,6,2 # v2 ?
+ blt 80f
+ stw 17,28(3) # save my cpu number as boot_cpu_phys
+80:
+ lis 6,kernel at h
+ ori 6,6,kernel at l
+ lwz 4,0(6) # load the kernel address
+ li 5,0 # r5 will be 0 for kernel
+ li 6,0 # clear r6 for good measure
+ mtctr 4 # prepare branch too
+
+ lwz 8,0(4) # get the first instruction that we stole
+ stw 8,0(0) # and put it in the slave loop at 0
+ # skip cache flush, do we care?
+
+ bctr # start kernel
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