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/*
* linux/arch/m32r/mm/discontig.c
*
* Discontig memory support
*
* Copyright (c) 2003 Hitoshi Yamamoto
*/
#include <linux/mm.h>
#include <linux/bootmem.h>
#include <linux/mmzone.h>
#include <linux/initrd.h>
#include <linux/nodemask.h>
#include <linux/module.h>
#include <linux/pfn.h>
#include <asm/setup.h>
extern char _end[];
struct pglist_data *node_data[MAX_NUMNODES];
EXPORT_SYMBOL(node_data);
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];
extern unsigned long memory_start;
extern unsigned long memory_end;
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(memory_end - memory_start);
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 = &bootmem_node_data[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,
BOOTMEM_DEFAULT);
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, BOOTMEM_DEFAULT);
initrd_start = INITRD_START + PAGE_OFFSET;
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%08llx)\ndisabling initrd\n",
INITRD_START + INITRD_SIZE,
(unsigned long long)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_min_pfn)
#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;
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, zones_size, start_pfn, zholes_size);
}
/*
* For test
* Use all area of internal RAM.
* see __alloc_pages()
*/
NODE_DATA(1)->node_zones->watermark[WMARK_MIN] = 0;
NODE_DATA(1)->node_zones->watermark[WMARK_LOW] = 0;
NODE_DATA(1)->node_zones->watermark[WMARK_HIGH] = 0;
return holes;
}
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