summaryrefslogtreecommitdiffstats
path: root/arch/arm/mm/nommu.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/mm/nommu.c')
-rw-r--r--arch/arm/mm/nommu.c43
1 files changed, 43 insertions, 0 deletions
diff --git a/arch/arm/mm/nommu.c b/arch/arm/mm/nommu.c
index 1464ed817b5..d0e66424a59 100644
--- a/arch/arm/mm/nommu.c
+++ b/arch/arm/mm/nommu.c
@@ -11,6 +11,49 @@
#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);
+}
+
+/*
+ * We don't need to do anything here for nommu machines.
+ */
+void setup_mm_for_reboot(char mode)
+{
+}
+
void flush_dcache_page(struct page *page)
{
__cpuc_flush_dcache_page(page_address(page));