[ARM] Split ARM MM initialisation for !mmu

Move the MMU specific code from init.c into mmu.c, and add nommu
fixups to nommu.c

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 36 insertions, 0 deletions

diff --git a/arch/arm/mm/nommu.c b/arch/arm/mm/nommu.c
index 1464ed817b5..e369aeb0c25 100644
--- a/arch/arm/mm/nommu.c
+++ b/arch/arm/mm/nommu.c
@@ -11,6 +11,42 @@
 #include <asm/io.h>
 #include <asm/page.h>
 
+#include "mm.h"
+
+extern void _stext, __data_start, _end;
+
+/*
+ * Reserve the various regions of node 0
+ */
+void __init reserve_node_zero(pg_data_t *pgdat)
+{
+        /*
+         * Register the kernel text and data with bootmem.
+         * Note that this can only be in node 0.
+         */
+#ifdef CONFIG_XIP_KERNEL
+        reserve_bootmem_node(pgdat, __pa(&__data_start), &_end - &__data_start);
+#else
+        reserve_bootmem_node(pgdat, __pa(&_stext), &_end - &_stext);
+#endif
+
+        /*
+         * Register the exception vector page.
+         * some architectures which the DRAM is the exception vector to trap,
+         * alloc_page breaks with error, although it is not NULL, but "0."
+         */
+        reserve_bootmem_node(pgdat, CONFIG_VECTORS_BASE, PAGE_SIZE);
+}
+
+/*
+ * paging_init() sets up the page tables, initialises the zone memory
+ * maps, and sets up the zero page, bad page and bad page tables.
+ */
+void __init paging_init(struct meminfo *mi, struct machine_desc *mdesc)
+{
+        bootmem_init(mi);
+}
+
 void flush_dcache_page(struct page *page)
 {
         __cpuc_flush_dcache_page(page_address(page));