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-rw-r--r--arch/m32r/mm/discontig.c171
1 files changed, 171 insertions, 0 deletions
diff --git a/arch/m32r/mm/discontig.c b/arch/m32r/mm/discontig.c
new file mode 100644
index 000000000000..1d1a01e54b3f
--- /dev/null
+++ b/arch/m32r/mm/discontig.c
@@ -0,0 +1,171 @@
+/*
+ * linux/arch/m32r/mm/discontig.c
+ *
+ * Discontig memory support
+ *
+ * Copyright (c) 2003 Hitoshi Yamamoto
+ */
+
+#include <linux/config.h>
+#include <linux/mm.h>
+#include <linux/bootmem.h>
+#include <linux/mmzone.h>
+#include <linux/initrd.h>
+#include <linux/nodemask.h>
+
+#include <asm/setup.h>
+
+extern char _end[];
+
+struct pglist_data *node_data[MAX_NUMNODES];
+static bootmem_data_t node_bdata[MAX_NUMNODES] __initdata;
+
+pg_data_t m32r_node_data[MAX_NUMNODES];
+
+/* Memory profile */
+typedef struct {
+ unsigned long start_pfn;
+ unsigned long pages;
+ unsigned long holes;
+ unsigned long free_pfn;
+} mem_prof_t;
+static mem_prof_t mem_prof[MAX_NUMNODES];
+
+static void __init mem_prof_init(void)
+{
+ unsigned long start_pfn, holes, free_pfn;
+ const unsigned long zone_alignment = 1UL << (MAX_ORDER - 1);
+ unsigned long ul;
+ mem_prof_t *mp;
+
+ /* Node#0 SDRAM */
+ mp = &mem_prof[0];
+ mp->start_pfn = PFN_UP(CONFIG_MEMORY_START);
+ mp->pages = PFN_DOWN(CONFIG_MEMORY_SIZE);
+ mp->holes = 0;
+ mp->free_pfn = PFN_UP(__pa(_end));
+
+ /* Node#1 internal SRAM */
+ mp = &mem_prof[1];
+ start_pfn = free_pfn = PFN_UP(CONFIG_IRAM_START);
+ holes = 0;
+ if (start_pfn & (zone_alignment - 1)) {
+ ul = zone_alignment;
+ while (start_pfn >= ul)
+ ul += zone_alignment;
+
+ start_pfn = ul - zone_alignment;
+ holes = free_pfn - start_pfn;
+ }
+
+ mp->start_pfn = start_pfn;
+ mp->pages = PFN_DOWN(CONFIG_IRAM_SIZE) + holes;
+ mp->holes = holes;
+ mp->free_pfn = PFN_UP(CONFIG_IRAM_START);
+}
+
+unsigned long __init setup_memory(void)
+{
+ unsigned long bootmap_size;
+ unsigned long min_pfn;
+ int nid;
+ mem_prof_t *mp;
+
+ max_low_pfn = 0;
+ min_low_pfn = -1;
+
+ mem_prof_init();
+
+ for_each_online_node(nid) {
+ mp = &mem_prof[nid];
+ NODE_DATA(nid)=(pg_data_t *)&m32r_node_data[nid];
+ NODE_DATA(nid)->bdata = &node_bdata[nid];
+ min_pfn = mp->start_pfn;
+ max_pfn = mp->start_pfn + mp->pages;
+ bootmap_size = init_bootmem_node(NODE_DATA(nid), mp->free_pfn,
+ mp->start_pfn, max_pfn);
+
+ free_bootmem_node(NODE_DATA(nid), PFN_PHYS(mp->start_pfn),
+ PFN_PHYS(mp->pages));
+
+ reserve_bootmem_node(NODE_DATA(nid), PFN_PHYS(mp->start_pfn),
+ PFN_PHYS(mp->free_pfn - mp->start_pfn) + bootmap_size);
+
+ if (max_low_pfn < max_pfn)
+ max_low_pfn = max_pfn;
+
+ if (min_low_pfn > min_pfn)
+ min_low_pfn = min_pfn;
+ }
+
+#ifdef CONFIG_BLK_DEV_INITRD
+ if (LOADER_TYPE && INITRD_START) {
+ if (INITRD_START + INITRD_SIZE <= PFN_PHYS(max_low_pfn)) {
+ reserve_bootmem_node(NODE_DATA(0), INITRD_START,
+ INITRD_SIZE);
+ initrd_start = INITRD_START ?
+ INITRD_START + PAGE_OFFSET : 0;
+
+ initrd_end = initrd_start + INITRD_SIZE;
+ printk("initrd:start[%08lx],size[%08lx]\n",
+ initrd_start, INITRD_SIZE);
+ } else {
+ printk("initrd extends beyond end of memory "
+ "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
+ INITRD_START + INITRD_SIZE,
+ PFN_PHYS(max_low_pfn));
+
+ initrd_start = 0;
+ }
+ }
+#endif /* CONFIG_BLK_DEV_INITRD */
+
+ return max_low_pfn;
+}
+
+#define START_PFN(nid) \
+ (NODE_DATA(nid)->bdata->node_boot_start >> PAGE_SHIFT)
+#define MAX_LOW_PFN(nid) (NODE_DATA(nid)->bdata->node_low_pfn)
+
+unsigned long __init zone_sizes_init(void)
+{
+ unsigned long zones_size[MAX_NR_ZONES], zholes_size[MAX_NR_ZONES];
+ unsigned long low, start_pfn;
+ unsigned long holes = 0;
+ int nid, i;
+ mem_prof_t *mp;
+
+ pgdat_list = NULL;
+ for (nid = num_online_nodes() - 1 ; nid >= 0 ; nid--) {
+ NODE_DATA(nid)->pgdat_next = pgdat_list;
+ pgdat_list = NODE_DATA(nid);
+ }
+
+ for_each_online_node(nid) {
+ mp = &mem_prof[nid];
+ for (i = 0 ; i < MAX_NR_ZONES ; i++) {
+ zones_size[i] = 0;
+ zholes_size[i] = 0;
+ }
+ start_pfn = START_PFN(nid);
+ low = MAX_LOW_PFN(nid);
+ zones_size[ZONE_DMA] = low - start_pfn;
+ zholes_size[ZONE_DMA] = mp->holes;
+ holes += zholes_size[ZONE_DMA];
+
+ free_area_init_node(nid, NODE_DATA(nid), zones_size,
+ start_pfn, zholes_size);
+ }
+
+ /*
+ * For test
+ * Use all area of internal RAM.
+ * see __alloc_pages()
+ */
+ NODE_DATA(1)->node_zones->pages_min = 0;
+ NODE_DATA(1)->node_zones->pages_low = 0;
+ NODE_DATA(1)->node_zones->pages_high = 0;
+
+ return holes;
+}
+