Merge git://git.kernel.org/pub/scm/linux/kernel/git/kyle/parisc-2.6

[linux-2.6-omap-h63xx.git] / arch / powerpc / kernel / machine_kexec_64.c

diff --git a/arch/powerpc/kernel/machine_kexec_64.c b/arch/powerpc/kernel/machine_kexec_64.c
index 97c51e452be74c16fb8cfca957c8ca5b7bf00f75..ee166c586642c7a61a0a727be0632d9e08b34412 100644 (file)
--- a/arch/powerpc/kernel/machine_kexec_64.c
+++ b/arch/powerpc/kernel/machine_kexec_64.c
@@ -1,5 +1,5 @@
 /*
- * machine_kexec.c - handle transition of Linux booting another kernel
+ * PPC64 code to handle Linux booting another kernel.
  *
  * Copyright (C) 2004-2005, IBM Corp.
  *
@@ -26,23 +26,7 @@
 #include <asm/prom.h>
 #include <asm/smp.h>
 
-#define HASH_GROUP_SIZE 0x80   /* size of each hash group, asm/mmu.h */
-
-/* Have this around till we move it into crash specific file */
-note_buf_t crash_notes[NR_CPUS];
-
-/* Dummy for now. Not sure if we need to have a crash shutdown in here
- * and if what it will achieve. Letting it be now to compile the code
- * in generic kexec environment
- */
-void machine_crash_shutdown(struct pt_regs *regs)
-{
-       /* do nothing right now */
-       /* smp_relase_cpus() if we want smp on panic kernel */
-       /* cpu_irq_down to isolate us until we are ready */
-}
-
-int machine_kexec_prepare(struct kimage *image)
+int default_machine_kexec_prepare(struct kimage *image)
 {
        int i;
        unsigned long begin, end;       /* limits of segment */
@@ -75,7 +59,7 @@ int machine_kexec_prepare(struct kimage *image)
         */
        if (htab_address) {
                low = __pa(htab_address);
-               high = low + (htab_hash_mask + 1) * HASH_GROUP_SIZE;
+               high = low + htab_size_bytes;
 
                for (i = 0; i < image->nr_segments; i++) {
                        begin = image->segment[i].mem;
@@ -111,11 +95,6 @@ int machine_kexec_prepare(struct kimage *image)
        return 0;
 }
 
-void machine_kexec_cleanup(struct kimage *image)
-{
-       /* we do nothing in prepare that needs to be undone */
-}
-
 #define IND_FLAGS (IND_DESTINATION | IND_INDIRECTION | IND_DONE | IND_SOURCE)
 
 static void copy_segments(unsigned long ind)
@@ -172,9 +151,8 @@ void kexec_copy_flush(struct kimage *image)
         * including ones that were in place on the original copy
         */
        for (i = 0; i < nr_segments; i++)
-               flush_icache_range(ranges[i].mem + KERNELBASE,
-                               ranges[i].mem + KERNELBASE +
-                               ranges[i].memsz);
+               flush_icache_range((unsigned long)__va(ranges[i].mem),
+                       (unsigned long)__va(ranges[i].mem + ranges[i].memsz));
 }
 
 #ifdef CONFIG_SMP
@@ -283,13 +261,20 @@ extern NORET_TYPE void kexec_sequence(void *newstack, unsigned long start,
                                        void (*clear_all)(void)) ATTRIB_NORET;
 
 /* too late to fail here */
-void machine_kexec(struct kimage *image)
+void default_machine_kexec(struct kimage *image)
 {
-
        /* prepare control code if any */
 
-       /* shutdown other cpus into our wait loop and quiesce interrupts */
-       kexec_prepare_cpus();
+       /*
+        * If the kexec boot is the normal one, need to shutdown other cpus
+        * into our wait loop and quiesce interrupts.
+        * Otherwise, in the case of crashed mode (crashing_cpu >= 0),
+        * stopping other CPUs and collecting their pt_regs is done before
+        * using debugger IPI.
+        */
+
+       if (crashing_cpu == -1)
+               kexec_prepare_cpus();
 
        /* switch to a staticly allocated stack.  Based on irq stack code.
         * XXX: the task struct will likely be invalid once we do the copy!
@@ -307,7 +292,7 @@ void machine_kexec(struct kimage *image)
 }
 
 /* Values we need to export to the second kernel via the device tree. */
-static unsigned long htab_base, htab_size, kernel_end;
+static unsigned long htab_base, kernel_end;
 
 static struct property htab_base_prop = {
        .name = "linux,htab-base",
@@ -318,7 +303,7 @@ static struct property htab_base_prop = {
 static struct property htab_size_prop = {
        .name = "linux,htab-size",
        .length = sizeof(unsigned long),
-       .value = (unsigned char *)&htab_size,
+       .value = (unsigned char *)&htab_size_bytes,
 };
 
 static struct property kernel_end_prop = {
@@ -344,8 +329,6 @@ static void __init export_htab_values(void)
 
        htab_base = __pa(htab_address);
        prom_add_property(node, &htab_base_prop);
-
-       htab_size = 1UL << ppc64_pft_size;
        prom_add_property(node, &htab_size_prop);
 
  out: