22a9835c35
Just about every architecture defines some macros to do operations on pfns. They're all virtually identical. This patch consolidates all of them. One minor glitch is that at least i386 uses them in a very skeletal header file. To keep away from #include dependency hell, I stuck the new definitions in a new, isolated header. Of all of the implementations, sh64 is the only one that varied by a bit. It used some masks to ensure that any sign-extension got ripped away before the arithmetic is done. This has been posted to that sh64 maintainers and the development list. Compiles on x86, x86_64, ia64 and ppc64. Signed-off-by: Dave Hansen <haveblue@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
168 lines
3.9 KiB
C
168 lines
3.9 KiB
C
/*
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* linux/arch/m32r/mm/discontig.c
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*
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* Discontig memory support
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*
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* Copyright (c) 2003 Hitoshi Yamamoto
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*/
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#include <linux/config.h>
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#include <linux/mm.h>
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#include <linux/bootmem.h>
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#include <linux/mmzone.h>
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#include <linux/initrd.h>
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#include <linux/nodemask.h>
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#include <linux/module.h>
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#include <linux/pfn.h>
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#include <asm/setup.h>
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extern char _end[];
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struct pglist_data *node_data[MAX_NUMNODES];
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EXPORT_SYMBOL(node_data);
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static bootmem_data_t node_bdata[MAX_NUMNODES] __initdata;
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pg_data_t m32r_node_data[MAX_NUMNODES];
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/* Memory profile */
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typedef struct {
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unsigned long start_pfn;
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unsigned long pages;
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unsigned long holes;
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unsigned long free_pfn;
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} mem_prof_t;
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static mem_prof_t mem_prof[MAX_NUMNODES];
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static void __init mem_prof_init(void)
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{
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unsigned long start_pfn, holes, free_pfn;
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const unsigned long zone_alignment = 1UL << (MAX_ORDER - 1);
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unsigned long ul;
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mem_prof_t *mp;
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/* Node#0 SDRAM */
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mp = &mem_prof[0];
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mp->start_pfn = PFN_UP(CONFIG_MEMORY_START);
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mp->pages = PFN_DOWN(CONFIG_MEMORY_SIZE);
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mp->holes = 0;
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mp->free_pfn = PFN_UP(__pa(_end));
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/* Node#1 internal SRAM */
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mp = &mem_prof[1];
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start_pfn = free_pfn = PFN_UP(CONFIG_IRAM_START);
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holes = 0;
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if (start_pfn & (zone_alignment - 1)) {
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ul = zone_alignment;
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while (start_pfn >= ul)
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ul += zone_alignment;
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start_pfn = ul - zone_alignment;
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holes = free_pfn - start_pfn;
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}
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mp->start_pfn = start_pfn;
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mp->pages = PFN_DOWN(CONFIG_IRAM_SIZE) + holes;
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mp->holes = holes;
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mp->free_pfn = PFN_UP(CONFIG_IRAM_START);
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}
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unsigned long __init setup_memory(void)
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{
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unsigned long bootmap_size;
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unsigned long min_pfn;
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int nid;
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mem_prof_t *mp;
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max_low_pfn = 0;
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min_low_pfn = -1;
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mem_prof_init();
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for_each_online_node(nid) {
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mp = &mem_prof[nid];
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NODE_DATA(nid)=(pg_data_t *)&m32r_node_data[nid];
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NODE_DATA(nid)->bdata = &node_bdata[nid];
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min_pfn = mp->start_pfn;
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max_pfn = mp->start_pfn + mp->pages;
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bootmap_size = init_bootmem_node(NODE_DATA(nid), mp->free_pfn,
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mp->start_pfn, max_pfn);
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free_bootmem_node(NODE_DATA(nid), PFN_PHYS(mp->start_pfn),
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PFN_PHYS(mp->pages));
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reserve_bootmem_node(NODE_DATA(nid), PFN_PHYS(mp->start_pfn),
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PFN_PHYS(mp->free_pfn - mp->start_pfn) + bootmap_size);
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if (max_low_pfn < max_pfn)
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max_low_pfn = max_pfn;
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if (min_low_pfn > min_pfn)
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min_low_pfn = min_pfn;
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}
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#ifdef CONFIG_BLK_DEV_INITRD
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if (LOADER_TYPE && INITRD_START) {
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if (INITRD_START + INITRD_SIZE <= PFN_PHYS(max_low_pfn)) {
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reserve_bootmem_node(NODE_DATA(0), INITRD_START,
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INITRD_SIZE);
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initrd_start = INITRD_START ?
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INITRD_START + PAGE_OFFSET : 0;
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initrd_end = initrd_start + INITRD_SIZE;
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printk("initrd:start[%08lx],size[%08lx]\n",
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initrd_start, INITRD_SIZE);
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} else {
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printk("initrd extends beyond end of memory "
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"(0x%08lx > 0x%08lx)\ndisabling initrd\n",
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INITRD_START + INITRD_SIZE,
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PFN_PHYS(max_low_pfn));
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initrd_start = 0;
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}
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}
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#endif /* CONFIG_BLK_DEV_INITRD */
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return max_low_pfn;
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}
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#define START_PFN(nid) \
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(NODE_DATA(nid)->bdata->node_boot_start >> PAGE_SHIFT)
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#define MAX_LOW_PFN(nid) (NODE_DATA(nid)->bdata->node_low_pfn)
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unsigned long __init zone_sizes_init(void)
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{
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unsigned long zones_size[MAX_NR_ZONES], zholes_size[MAX_NR_ZONES];
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unsigned long low, start_pfn;
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unsigned long holes = 0;
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int nid, i;
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mem_prof_t *mp;
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for_each_online_node(nid) {
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mp = &mem_prof[nid];
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for (i = 0 ; i < MAX_NR_ZONES ; i++) {
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zones_size[i] = 0;
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zholes_size[i] = 0;
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}
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start_pfn = START_PFN(nid);
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low = MAX_LOW_PFN(nid);
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zones_size[ZONE_DMA] = low - start_pfn;
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zholes_size[ZONE_DMA] = mp->holes;
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holes += zholes_size[ZONE_DMA];
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free_area_init_node(nid, NODE_DATA(nid), zones_size,
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start_pfn, zholes_size);
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}
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/*
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* For test
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* Use all area of internal RAM.
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* see __alloc_pages()
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*/
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NODE_DATA(1)->node_zones->pages_min = 0;
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NODE_DATA(1)->node_zones->pages_low = 0;
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NODE_DATA(1)->node_zones->pages_high = 0;
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return holes;
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}
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