[MIPS] Support /proc/kcore for MIPS

    
I'm pretty sure that the CKSEG0 bits are wrong, but I did need to
cover that region - because the SB-1 kernel links at 0xffffffff80100000
or so, disassembly and printing static variables don't work unless the
debugger can read that region.
    
Signed-off-by: Daniel Jacobowitz <dan@codesourcery.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 16 insertions, 0 deletions

diff --git a/arch/mips/mm/init.c b/arch/mips/mm/init.c
index 4ee91c9a556f..0ff9a348b843 100644
--- a/arch/mips/mm/init.c
+++ b/arch/mips/mm/init.c
@@ -24,6 +24,7 @@
 #include <linux/bootmem.h>
 #include <linux/highmem.h>
 #include <linux/swap.h>
+#include <linux/proc_fs.h>
 
 #include <asm/bootinfo.h>
 #include <asm/cachectl.h>
@@ -200,6 +201,11 @@ static inline int page_is_ram(unsigned long pagenr)
         return 0;
 }
 
+static struct kcore_list kcore_mem, kcore_vmalloc;
+#ifdef CONFIG_64BIT
+static struct kcore_list kcore_kseg0;
+#endif
+
 void __init mem_init(void)
 {
         unsigned long codesize, reservedpages, datasize, initsize;
@@ -249,6 +255,16 @@ void __init mem_init(void)
         datasize =  (unsigned long) &_edata - (unsigned long) &_etext;
         initsize =  (unsigned long) &__init_end - (unsigned long) &__init_begin;
 
+#ifdef CONFIG_64BIT
+        if ((unsigned long) &_text > (unsigned long) CKSEG0)
+                /* The -4 is a hack so that user tools don't have to handle
+                   the overflow.  */
+                kclist_add(&kcore_kseg0, (void *) CKSEG0, 0x80000000 - 4);
+#endif
+        kclist_add(&kcore_mem, __va(0), max_low_pfn << PAGE_SHIFT);
+        kclist_add(&kcore_vmalloc, (void *)VMALLOC_START,
+                   VMALLOC_END-VMALLOC_START);
+
         printk(KERN_INFO "Memory: %luk/%luk available (%ldk kernel code, "
                "%ldk reserved, %ldk data, %ldk init, %ldk highmem)\n",
                (unsigned long) nr_free_pages() << (PAGE_SHIFT-10),