sh: pretty print virtual memory map on boot.

This cribs the pretty printing from arch/x86/mm/init_32.c to dump the
virtual memory layout on boot. This is primarily intended as a debugging
aid, given that the newer CPUs have full control over their address space
and as such have little to nothing in common with the legacy layout.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 36 insertions, 2 deletions

diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c
index 491d9d5c8e0d..f3e23ad075cb 100644
--- a/arch/sh/mm/init.c
+++ b/arch/sh/mm/init.c
@@ -260,6 +260,9 @@ void __init mem_init(void)
         memset(empty_zero_page, 0, PAGE_SIZE);
         __flush_wback_region(empty_zero_page, PAGE_SIZE);
 
+        /* Initialize the vDSO */
+        vsyscall_init();
+
         codesize =  (unsigned long) &_etext - (unsigned long) &_text;
         datasize =  (unsigned long) &_edata - (unsigned long) &_etext;
         initsize =  (unsigned long) &__init_end - (unsigned long) &__init_begin;
@@ -272,8 +275,39 @@ void __init mem_init(void)
                 datasize >> 10,
                 initsize >> 10);
 
-        /* Initialize the vDSO */
-        vsyscall_init();
+        printk(KERN_INFO "virtual kernel memory layout:\n"
+                "    fixmap  : 0x%08lx - 0x%08lx   (%4ld kB)\n"
+#ifdef CONFIG_HIGHMEM
+                "    pkmap   : 0x%08lx - 0x%08lx   (%4ld kB)\n"
+#endif
+                "    vmalloc : 0x%08lx - 0x%08lx   (%4ld MB)\n"
+                "    lowmem  : 0x%08lx - 0x%08lx   (%4ld MB)\n"
+                "      .init : 0x%08lx - 0x%08lx   (%4ld kB)\n"
+                "      .data : 0x%08lx - 0x%08lx   (%4ld kB)\n"
+                "      .text : 0x%08lx - 0x%08lx   (%4ld kB)\n",
+                FIXADDR_START, FIXADDR_TOP,
+                (FIXADDR_TOP - FIXADDR_START) >> 10,
+
+#ifdef CONFIG_HIGHMEM
+                PKMAP_BASE, PKMAP_BASE+LAST_PKMAP*PAGE_SIZE,
+                (LAST_PKMAP*PAGE_SIZE) >> 10,
+#endif
+
+                (unsigned long)VMALLOC_START, VMALLOC_END,
+                (VMALLOC_END - VMALLOC_START) >> 20,
+
+                (unsigned long)memory_start, (unsigned long)high_memory,
+                ((unsigned long)high_memory - (unsigned long)memory_start) >> 20,
+
+                (unsigned long)&__init_begin, (unsigned long)&__init_end,
+                ((unsigned long)&__init_end -
+                 (unsigned long)&__init_begin) >> 10,
+
+                (unsigned long)&_etext, (unsigned long)&_edata,
+                ((unsigned long)&_edata - (unsigned long)&_etext) >> 10,
+
+                (unsigned long)&_text, (unsigned long)&_etext,
+                ((unsigned long)&_etext - (unsigned long)&_text) >> 10);
 
         mem_init_done = 1;
 }