Merge branch 'master' into for_paulus

[linux-drm-fsl-dcu.git] / arch / ia64 / kernel / setup.c

diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c
index d10404a4175630c6d18ccfe5aa5e265face6ec68..5fa09d141ab7a8545a963dfb1e9e60fdb316ea7e 100644 (file)
--- a/arch/ia64/kernel/setup.c
+++ b/arch/ia64/kernel/setup.c
@@ -43,6 +43,8 @@
 #include <linux/initrd.h>
 #include <linux/pm.h>
 #include <linux/cpufreq.h>
+#include <linux/kexec.h>
+#include <linux/crash_dump.h>
 
 #include <asm/ia32.h>
 #include <asm/machvec.h>
@@ -252,6 +254,47 @@ reserve_memory (void)
        efi_memmap_init(&rsvd_region[n].start, &rsvd_region[n].end);
        n++;
 
+#ifdef CONFIG_KEXEC
+       /* crashkernel=size@offset specifies the size to reserve for a crash
+        * kernel. If offset is 0, then it is determined automatically.
+        * By reserving this memory we guarantee that linux never set's it
+        * up as a DMA target.Useful for holding code to do something
+        * appropriate after a kernel panic.
+        */
+       {
+               char *from = strstr(boot_command_line, "crashkernel=");
+               unsigned long base, size;
+               if (from) {
+                       size = memparse(from + 12, &from);
+                       if (*from == '@')
+                               base = memparse(from+1, &from);
+                       else
+                               base = 0;
+                       if (size) {
+                               if (!base) {
+                                       sort_regions(rsvd_region, n);
+                                       base = kdump_find_rsvd_region(size,
+                                                               rsvd_region, n);
+                                       }
+                               if (base != ~0UL) {
+                                       rsvd_region[n].start =
+                                               (unsigned long)__va(base);
+                                       rsvd_region[n].end =
+                                               (unsigned long)__va(base + size);
+                                       n++;
+                                       crashk_res.start = base;
+                                       crashk_res.end = base + size - 1;
+                               }
+                       }
+               }
+               efi_memmap_res.start = ia64_boot_param->efi_memmap;
+                efi_memmap_res.end = efi_memmap_res.start +
+                        ia64_boot_param->efi_memmap_size;
+                boot_param_res.start = __pa(ia64_boot_param);
+                boot_param_res.end = boot_param_res.start +
+                        sizeof(*ia64_boot_param);
+       }
+#endif
        /* end of memory marker */
        rsvd_region[n].start = ~0UL;
        rsvd_region[n].end   = ~0UL;
@@ -263,6 +306,7 @@ reserve_memory (void)
        sort_regions(rsvd_region, num_rsvd_regions);
 }
 
+
 /**
  * find_initrd - get initrd parameters from the boot parameter structure
  *
@@ -396,6 +440,21 @@ static __init int setup_nomca(char *s)
 }
 early_param("nomca", setup_nomca);
 
+#ifdef CONFIG_PROC_VMCORE
+/* elfcorehdr= specifies the location of elf core header
+ * stored by the crashed kernel.
+ */
+static int __init parse_elfcorehdr(char *arg)
+{
+       if (!arg)
+               return -EINVAL;
+
+        elfcorehdr_addr = memparse(arg, &arg);
+       return 0;
+}
+early_param("elfcorehdr", parse_elfcorehdr);
+#endif /* CONFIG_PROC_VMCORE */
+
 void __init
 setup_arch (char **cmdline_p)
 {
@@ -404,7 +463,7 @@ setup_arch (char **cmdline_p)
        ia64_patch_vtop((u64) __start___vtop_patchlist, (u64) __end___vtop_patchlist);
 
        *cmdline_p = __va(ia64_boot_param->command_line);
-       strlcpy(saved_command_line, *cmdline_p, COMMAND_LINE_SIZE);
+       strlcpy(boot_command_line, *cmdline_p, COMMAND_LINE_SIZE);
 
        efi_init();
        io_port_init();
@@ -510,34 +569,31 @@ show_cpuinfo (struct seq_file *m, void *v)
                { 1UL << 1, "spontaneous deferral"},
                { 1UL << 2, "16-byte atomic ops" }
        };
-       char features[128], *cp, sep;
+       char features[128], *cp, *sep;
        struct cpuinfo_ia64 *c = v;
        unsigned long mask;
        unsigned long proc_freq;
-       int i;
+       int i, size;
 
        mask = c->features;
 
        /* build the feature string: */
-       memcpy(features, " standard", 10);
+       memcpy(features, "standard", 9);
        cp = features;
-       sep = 0;
-       for (i = 0; i < (int) ARRAY_SIZE(feature_bits); ++i) {
+       size = sizeof(features);
+       sep = "";
+       for (i = 0; i < ARRAY_SIZE(feature_bits) && size > 1; ++i) {
                if (mask & feature_bits[i].mask) {
-                       if (sep)
-                               *cp++ = sep;
-                       sep = ',';
-                       *cp++ = ' ';
-                       strcpy(cp, feature_bits[i].feature_name);
-                       cp += strlen(feature_bits[i].feature_name);
+                       cp += snprintf(cp, size, "%s%s", sep,
+                                      feature_bits[i].feature_name),
+                       sep = ", ";
                        mask &= ~feature_bits[i].mask;
+                       size = sizeof(features) - (cp - features);
                }
        }
-       if (mask) {
-               /* print unknown features as a hex value: */
-               if (sep)
-                       *cp++ = sep;
-               sprintf(cp, " 0x%lx", mask);
+       if (mask && size > 1) {
+               /* print unknown features as a hex value */
+               snprintf(cp, size, "%s0x%lx", sep, mask);
        }
 
        proc_freq = cpufreq_quick_get(cpunum);
@@ -553,7 +609,7 @@ show_cpuinfo (struct seq_file *m, void *v)
                   "model name : %s\n"
                   "revision   : %u\n"
                   "archrev    : %u\n"
-                  "features   :%s\n"   /* don't change this---it _is_ right! */
+                  "features   : %s\n"
                   "cpu number : %lu\n"
                   "cpu regs   : %u\n"
                   "cpu MHz    : %lu.%06lu\n"
@@ -615,6 +671,7 @@ get_model_name(__u8 family, __u8 model)
 {
        char brand[128];
 
+       memcpy(brand, "Unknown", 8);
        if (ia64_pal_get_brand_info(brand)) {
                if (family == 0x7)
                        memcpy(brand, "Merced", 7);
@@ -622,8 +679,7 @@ get_model_name(__u8 family, __u8 model)
                        case 0: memcpy(brand, "McKinley", 9); break;
                        case 1: memcpy(brand, "Madison", 8); break;
                        case 2: memcpy(brand, "Madison up to 9M cache", 23); break;
-               } else
-                       memcpy(brand, "Unknown", 8);
+               }
        }
        if (brandname[0] == '\0')
                return strcpy(brandname, brand);