1 files changed, 98 insertions, 2 deletions

diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index 122d999bdc7c..776ea1aa974b 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -19,12 +19,15 @@
 #include <linux/seq_file.h>
 #include <linux/screen_info.h>
 #include <linux/init.h>
+#include <linux/kexec.h>
+#include <linux/crash_dump.h>
 #include <linux/root_dev.h>
 #include <linux/cpu.h>
 #include <linux/interrupt.h>
 #include <linux/smp.h>
 #include <linux/fs.h>
 #include <linux/proc_fs.h>
+#include <linux/memblock.h>
 
 #include <asm/unified.h>
 #include <asm/cpu.h>
@@ -269,6 +272,21 @@ static void __init cacheid_init(void)
 extern struct proc_info_list *lookup_processor_type(unsigned int);
 extern struct machine_desc *lookup_machine_type(unsigned int);
 
+static void __init feat_v6_fixup(void)
+{
+        int id = read_cpuid_id();
+
+        if ((id & 0xff0f0000) != 0x41070000)
+                return;
+
+        /*
+         * HWCAP_TLS is available only on 1136 r1p0 and later,
+         * see also kuser_get_tls_init.
+         */
+        if ((((id >> 4) & 0xfff) == 0xb36) && (((id >> 20) & 3) == 0))
+                elf_hwcap &= ~HWCAP_TLS;
+}
+
 static void __init setup_processor(void)
 {
         struct proc_info_list *list;
@@ -311,6 +329,8 @@ static void __init setup_processor(void)
         elf_hwcap &= ~HWCAP_THUMB;
 #endif
 
+        feat_v6_fixup();
+
         cacheid_init();
         cpu_proc_init();
 }
@@ -402,13 +422,12 @@ static int __init arm_add_memory(unsigned long start, unsigned long size)
         size -= start & ~PAGE_MASK;
         bank->start = PAGE_ALIGN(start);
         bank->size  = size & PAGE_MASK;
-        bank->node  = PHYS_TO_NID(start);
 
         /*
          * Check whether this memory region has non-zero size or
          * invalid node number.
          */
-        if (bank->size == 0 || bank->node >= MAX_NUMNODES)
+        if (bank->size == 0)
                 return -EINVAL;
 
         meminfo.nr_banks++;
@@ -663,6 +682,79 @@ static int __init customize_machine(void)
 }
 arch_initcall(customize_machine);
 
+#ifdef CONFIG_KEXEC
+static inline unsigned long long get_total_mem(void)
+{
+        unsigned long total;
+
+        total = max_low_pfn - min_low_pfn;
+        return total << PAGE_SHIFT;
+}
+
+/**
+ * reserve_crashkernel() - reserves memory are for crash kernel
+ *
+ * This function reserves memory area given in "crashkernel=" kernel command
+ * line parameter. The memory reserved is used by a dump capture kernel when
+ * primary kernel is crashing.
+ */
+static void __init reserve_crashkernel(void)
+{
+        unsigned long long crash_size, crash_base;
+        unsigned long long total_mem;
+        int ret;
+
+        total_mem = get_total_mem();
+        ret = parse_crashkernel(boot_command_line, total_mem,
+                                &crash_size, &crash_base);
+        if (ret)
+                return;
+
+        ret = reserve_bootmem(crash_base, crash_size, BOOTMEM_EXCLUSIVE);
+        if (ret < 0) {
+                printk(KERN_WARNING "crashkernel reservation failed - "
+                       "memory is in use (0x%lx)\n", (unsigned long)crash_base);
+                return;
+        }
+
+        printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
+               "for crashkernel (System RAM: %ldMB)\n",
+               (unsigned long)(crash_size >> 20),
+               (unsigned long)(crash_base >> 20),
+               (unsigned long)(total_mem >> 20));
+
+        crashk_res.start = crash_base;
+        crashk_res.end = crash_base + crash_size - 1;
+        insert_resource(&iomem_resource, &crashk_res);
+}
+#else
+static inline void reserve_crashkernel(void) {}
+#endif /* CONFIG_KEXEC */
+
+/*
+ * Note: elfcorehdr_addr is not just limited to vmcore. It is also used by
+ * is_kdump_kernel() to determine if we are booting after a panic. Hence
+ * ifdef it under CONFIG_CRASH_DUMP and not CONFIG_PROC_VMCORE.
+ */
+
+#ifdef CONFIG_CRASH_DUMP
+/*
+ * elfcorehdr= specifies the location of elf core header stored by the crashed
+ * kernel. This option will be passed by kexec loader to the capture kernel.
+ */
+static int __init setup_elfcorehdr(char *arg)
+{
+        char *end;
+
+        if (!arg)
+                return -EINVAL;
+
+        elfcorehdr_addr = memparse(arg, &end);
+        return end > arg ? 0 : -EINVAL;
+}
+early_param("elfcorehdr", setup_elfcorehdr);
+#endif /* CONFIG_CRASH_DUMP */
+
 void __init setup_arch(char **cmdline_p)
 {
         struct tag *tags = (struct tag *)&init_tags;
@@ -716,12 +808,15 @@ void __init setup_arch(char **cmdline_p)
 
         parse_early_param();
 
+        arm_memblock_init(&meminfo, mdesc);
+
         paging_init(mdesc);
         request_standard_resources(&meminfo, mdesc);
 
 #ifdef CONFIG_SMP
         smp_init_cpus();
 #endif
+        reserve_crashkernel();
 
         cpu_init();
         tcm_init();
@@ -729,6 +824,7 @@ void __init setup_arch(char **cmdline_p)
         /*
          * Set up various architecture-specific pointers
          */
+        arch_nr_irqs = mdesc->nr_irqs;
         init_arch_irq = mdesc->init_irq;
         system_timer = mdesc->timer;
         init_machine = mdesc->init_machine;