powerpc/mm: Fix page table dump build on PPC32

On PPC32 (eg. mpc885_ads_defconfig), page table dump compilation fails as
follows. This is because the memory layout is slightly different on PPC32. This
patch adapts it.

  arch/powerpc/mm/dump_linuxpagetables.c: In function 'walk_pagetables':
  arch/powerpc/mm/dump_linuxpagetables.c:369:10: error: 'KERN_VIRT_START' undeclared (first use in this function)
  ...

Fixes: 8eb07b187000d ("powerpc/mm: Dump linux pagetables")
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

1 files changed, 48 insertions, 11 deletions

diff --git a/arch/powerpc/mm/dump_linuxpagetables.c b/arch/powerpc/mm/dump_linuxpagetables.c
index b4cb7818dfd0..bb136ac6ac55 100644
--- a/arch/powerpc/mm/dump_linuxpagetables.c
+++ b/arch/powerpc/mm/dump_linuxpagetables.c
@@ -26,6 +26,10 @@
 #include <asm/page.h>
 #include <asm/pgalloc.h>
 
+#ifdef CONFIG_PPC32
+#define KERN_VIRT_START 0
+#endif
+
 /*
  * To visualise what is happening,
  *
@@ -71,6 +75,7 @@ static struct addr_marker address_markers[] = {
         { 0,    "Start of kernel VM" },
         { 0,    "vmalloc() Area" },
         { 0,    "vmalloc() End" },
+#ifdef CONFIG_PPC64
         { 0,    "isa I/O start" },
         { 0,    "isa I/O end" },
         { 0,    "phb I/O start" },
@@ -78,6 +83,20 @@ static struct addr_marker address_markers[] = {
         { 0,    "I/O remap start" },
         { 0,    "I/O remap end" },
         { 0,    "vmemmap start" },
+#else
+        { 0,    "Early I/O remap start" },
+        { 0,    "Early I/O remap end" },
+#ifdef CONFIG_NOT_COHERENT_CACHE
+        { 0,    "Consistent mem start" },
+        { 0,    "Consistent mem end" },
+#endif
+#ifdef CONFIG_HIGHMEM
+        { 0,    "Highmem PTEs start" },
+        { 0,    "Highmem PTEs end" },
+#endif
+        { 0,    "Fixmap start" },
+        { 0,    "Fixmap end" },
+#endif
         { -1,   NULL },
 };
 
@@ -404,20 +423,38 @@ static void walk_pagetables(struct pg_state *st)
 
 static void populate_markers(void)
 {
-        address_markers[0].start_address = PAGE_OFFSET;
-        address_markers[1].start_address = VMALLOC_START;
-        address_markers[2].start_address = VMALLOC_END;
-        address_markers[3].start_address = ISA_IO_BASE;
-        address_markers[4].start_address = ISA_IO_END;
-        address_markers[5].start_address = PHB_IO_BASE;
-        address_markers[6].start_address = PHB_IO_END;
-        address_markers[7].start_address = IOREMAP_BASE;
-        address_markers[8].start_address = IOREMAP_END;
+        int i = 0;
+
+        address_markers[i++].start_address = PAGE_OFFSET;
+        address_markers[i++].start_address = VMALLOC_START;
+        address_markers[i++].start_address = VMALLOC_END;
+#ifdef CONFIG_PPC64
+        address_markers[i++].start_address = ISA_IO_BASE;
+        address_markers[i++].start_address = ISA_IO_END;
+        address_markers[i++].start_address = PHB_IO_BASE;
+        address_markers[i++].start_address = PHB_IO_END;
+        address_markers[i++].start_address = IOREMAP_BASE;
+        address_markers[i++].start_address = IOREMAP_END;
 #ifdef CONFIG_PPC_STD_MMU_64
-        address_markers[9].start_address =  H_VMEMMAP_BASE;
+        address_markers[i++].start_address =  H_VMEMMAP_BASE;
 #else
-        address_markers[9].start_address =  VMEMMAP_BASE;
+        address_markers[i++].start_address =  VMEMMAP_BASE;
+#endif
+#else /* !CONFIG_PPC64 */
+        address_markers[i++].start_address = ioremap_bot;
+        address_markers[i++].start_address = IOREMAP_TOP;
+#ifdef CONFIG_NOT_COHERENT_CACHE
+        address_markers[i++].start_address = IOREMAP_TOP;
+        address_markers[i++].start_address = IOREMAP_TOP +
+                                             CONFIG_CONSISTENT_SIZE;
+#endif
+#ifdef CONFIG_HIGHMEM
+        address_markers[i++].start_address = PKMAP_BASE;
+        address_markers[i++].start_address = PKMAP_ADDR(LAST_PKMAP);
 #endif
+        address_markers[i++].start_address = FIXADDR_START;
+        address_markers[i++].start_address = FIXADDR_TOP;
+#endif /* CONFIG_PPC64 */
 }
 
 static int ptdump_show(struct seq_file *m, void *v)