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-rw-r--r--arch/arm26/mm/init.c403
1 files changed, 0 insertions, 403 deletions
diff --git a/arch/arm26/mm/init.c b/arch/arm26/mm/init.c
deleted file mode 100644
index 36e7ee3f8321..000000000000
--- a/arch/arm26/mm/init.c
+++ /dev/null
@@ -1,403 +0,0 @@
-/*
- * linux/arch/arm26/mm/init.c
- *
- * Copyright (C) 1995-2002 Russell King
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/string.h>
-#include <linux/types.h>
-#include <linux/ptrace.h>
-#include <linux/mman.h>
-#include <linux/mm.h>
-#include <linux/swap.h>
-#include <linux/smp.h>
-#include <linux/init.h>
-#include <linux/initrd.h>
-#include <linux/bootmem.h>
-#include <linux/blkdev.h>
-#include <linux/pfn.h>
-
-#include <asm/segment.h>
-#include <asm/mach-types.h>
-#include <asm/dma.h>
-#include <asm/hardware.h>
-#include <asm/setup.h>
-#include <asm/tlb.h>
-
-#include <asm/map.h>
-
-struct mmu_gather mmu_gathers[NR_CPUS];
-
-extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
-extern char _stext, _text, _etext, _end, __init_begin, __init_end;
-#ifdef CONFIG_XIP_KERNEL
-extern char _endtext, _sdata;
-#endif
-extern unsigned long phys_initrd_start;
-extern unsigned long phys_initrd_size;
-
-/*
- * The sole use of this is to pass memory configuration
- * data from paging_init to mem_init.
- */
-static struct meminfo meminfo __initdata = { 0, };
-
-/*
- * empty_zero_page is a special page that is used for
- * zero-initialized data and COW.
- */
-struct page *empty_zero_page;
-
-void show_mem(void)
-{
- int free = 0, total = 0, reserved = 0;
- int shared = 0, cached = 0, slab = 0;
- struct page *page, *end;
-
- printk("Mem-info:\n");
- show_free_areas();
- printk("Free swap: %6ldkB\n", nr_swap_pages<<(PAGE_SHIFT-10));
-
-
- page = NODE_MEM_MAP(0);
- end = page + NODE_DATA(0)->node_spanned_pages;
-
- do {
- total++;
- if (PageReserved(page))
- reserved++;
- else if (PageSwapCache(page))
- cached++;
- else if (PageSlab(page))
- slab++;
- else if (!page_count(page))
- free++;
- else
- shared += page_count(page) - 1;
- page++;
- } while (page < end);
-
- printk("%d pages of RAM\n", total);
- printk("%d free pages\n", free);
- printk("%d reserved pages\n", reserved);
- printk("%d slab pages\n", slab);
- printk("%d pages shared\n", shared);
- printk("%d pages swap cached\n", cached);
-}
-
-struct node_info {
- unsigned int start;
- unsigned int end;
- int bootmap_pages;
-};
-
-/*
- * FIXME: We really want to avoid allocating the bootmap bitmap
- * over the top of the initrd. Hopefully, this is located towards
- * the start of a bank, so if we allocate the bootmap bitmap at
- * the end, we won't clash.
- */
-static unsigned int __init
-find_bootmap_pfn(struct meminfo *mi, unsigned int bootmap_pages)
-{
- unsigned int start_pfn, bootmap_pfn;
- unsigned int start, end;
-
- start_pfn = PFN_UP((unsigned long)&_end);
- bootmap_pfn = 0;
-
- /* ARM26 machines only have one node */
- if (mi->bank->node != 0)
- BUG();
-
- start = PFN_UP(mi->bank->start);
- end = PFN_DOWN(mi->bank->size + mi->bank->start);
-
- if (start < start_pfn)
- start = start_pfn;
-
- if (end <= start)
- BUG();
-
- if (end - start >= bootmap_pages)
- bootmap_pfn = start;
- else
- BUG();
-
- return bootmap_pfn;
-}
-
-/*
- * Scan the memory info structure and pull out:
- * - the end of memory
- * - the number of nodes
- * - the pfn range of each node
- * - the number of bootmem bitmap pages
- */
-static void __init
-find_memend_and_nodes(struct meminfo *mi, struct node_info *np)
-{
- unsigned int memend_pfn = 0;
-
- nodes_clear(node_online_map);
- node_set_online(0);
-
- np->bootmap_pages = 0;
-
- if (mi->bank->size == 0) {
- BUG();
- }
-
- /*
- * Get the start and end pfns for this bank
- */
- np->start = PFN_UP(mi->bank->start);
- np->end = PFN_DOWN(mi->bank->start + mi->bank->size);
-
- if (memend_pfn < np->end)
- memend_pfn = np->end;
-
- /*
- * Calculate the number of pages we require to
- * store the bootmem bitmaps.
- */
- np->bootmap_pages = bootmem_bootmap_pages(np->end - np->start);
-
- /*
- * This doesn't seem to be used by the Linux memory
- * manager any more. If we can get rid of it, we
- * also get rid of some of the stuff above as well.
- */
- max_low_pfn = memend_pfn - PFN_DOWN(PHYS_OFFSET);
- max_pfn = memend_pfn - PFN_DOWN(PHYS_OFFSET);
- mi->end = memend_pfn << PAGE_SHIFT;
-
-}
-
-/*
- * Initialise the bootmem allocator for all nodes. This is called
- * early during the architecture specific initialisation.
- */
-void __init bootmem_init(struct meminfo *mi)
-{
- struct node_info node_info;
- unsigned int bootmap_pfn;
- pg_data_t *pgdat = NODE_DATA(0);
-
- find_memend_and_nodes(mi, &node_info);
-
- bootmap_pfn = find_bootmap_pfn(mi, node_info.bootmap_pages);
-
- /*
- * Note that node 0 must always have some pages.
- */
- if (node_info.end == 0)
- BUG();
-
- /*
- * Initialise the bootmem allocator.
- */
- init_bootmem_node(pgdat, bootmap_pfn, node_info.start, node_info.end);
-
- /*
- * Register all available RAM in this node with the bootmem allocator.
- */
- free_bootmem_node(pgdat, mi->bank->start, mi->bank->size);
-
- /*
- * Register the kernel text and data with bootmem.
- * Note: with XIP we dont register .text since
- * its in ROM.
- */
-#ifdef CONFIG_XIP_KERNEL
- reserve_bootmem_node(pgdat, __pa(&_sdata), &_end - &_sdata);
-#else
- reserve_bootmem_node(pgdat, __pa(&_stext), &_end - &_stext);
-#endif
-
- /*
- * And don't forget to reserve the allocator bitmap,
- * which will be freed later.
- */
- reserve_bootmem_node(pgdat, bootmap_pfn << PAGE_SHIFT,
- node_info.bootmap_pages << PAGE_SHIFT);
-
- /*
- * These should likewise go elsewhere. They pre-reserve
- * the screen memory region at the start of main system
- * memory. FIXME - screen RAM is not 512K!
- */
- reserve_bootmem_node(pgdat, 0x02000000, 0x00080000);
-
-#ifdef CONFIG_BLK_DEV_INITRD
- initrd_start = phys_initrd_start;
- initrd_end = initrd_start + phys_initrd_size;
-
- /* Achimedes machines only have one node, so initrd is in node 0 */
-#ifdef CONFIG_XIP_KERNEL
- /* Only reserve initrd space if it is in RAM */
- if(initrd_start && initrd_start < 0x03000000){
-#else
- if(initrd_start){
-#endif
- reserve_bootmem_node(pgdat, __pa(initrd_start),
- initrd_end - initrd_start);
- }
-#endif /* CONFIG_BLK_DEV_INITRD */
-
-
-}
-
-/*
- * 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)
-{
- void *zero_page;
- unsigned long zone_size[MAX_NR_ZONES];
- unsigned long zhole_size[MAX_NR_ZONES];
- struct bootmem_data *bdata;
- pg_data_t *pgdat;
- int i;
-
- memcpy(&meminfo, mi, sizeof(meminfo));
-
- /*
- * allocate the zero page. Note that we count on this going ok.
- */
- zero_page = alloc_bootmem_low_pages(PAGE_SIZE);
-
- /*
- * initialise the page tables.
- */
- memtable_init(mi);
- flush_tlb_all();
-
- /*
- * initialise the zones in node 0 (archimedes have only 1 node)
- */
-
- for (i = 0; i < MAX_NR_ZONES; i++) {
- zone_size[i] = 0;
- zhole_size[i] = 0;
- }
-
- pgdat = NODE_DATA(0);
- bdata = pgdat->bdata;
- zone_size[0] = bdata->node_low_pfn -
- (bdata->node_boot_start >> PAGE_SHIFT);
- if (!zone_size[0])
- BUG();
- pgdat->node_mem_map = NULL;
- free_area_init_node(0, pgdat, zone_size,
- bdata->node_boot_start >> PAGE_SHIFT, zhole_size);
-
- /*
- * finish off the bad pages once
- * the mem_map is initialised
- */
- memzero(zero_page, PAGE_SIZE);
- empty_zero_page = virt_to_page(zero_page);
-}
-
-static inline void free_area(unsigned long addr, unsigned long end, char *s)
-{
- unsigned int size = (end - addr) >> 10;
-
- for (; addr < end; addr += PAGE_SIZE) {
- struct page *page = virt_to_page(addr);
- ClearPageReserved(page);
- init_page_count(page);
- free_page(addr);
- totalram_pages++;
- }
-
- if (size && s)
- printk(KERN_INFO "Freeing %s memory: %dK\n", s, size);
-}
-
-/*
- * mem_init() marks the free areas in the mem_map and tells us how much
- * memory is free. This is done after various parts of the system have
- * claimed their memory after the kernel image.
- */
-void __init mem_init(void)
-{
- unsigned int codepages, datapages, initpages;
- pg_data_t *pgdat = NODE_DATA(0);
- extern int sysctl_overcommit_memory;
-
-
- /* Note: data pages includes BSS */
-#ifdef CONFIG_XIP_KERNEL
- codepages = &_endtext - &_text;
- datapages = &_end - &_sdata;
-#else
- codepages = &_etext - &_text;
- datapages = &_end - &_etext;
-#endif
- initpages = &__init_end - &__init_begin;
-
- high_memory = (void *)__va(meminfo.end);
- max_mapnr = virt_to_page(high_memory) - mem_map;
-
- /* this will put all unused low memory onto the freelists */
- if (pgdat->node_spanned_pages != 0)
- totalram_pages += free_all_bootmem_node(pgdat);
-
- num_physpages = meminfo.bank[0].size >> PAGE_SHIFT;
-
- printk(KERN_INFO "Memory: %luMB total\n", num_physpages >> (20 - PAGE_SHIFT));
- printk(KERN_NOTICE "Memory: %luKB available (%dK code, "
- "%dK data, %dK init)\n",
- (unsigned long) nr_free_pages() << (PAGE_SHIFT-10),
- codepages >> 10, datapages >> 10, initpages >> 10);
-
- /*
- * Turn on overcommit on tiny machines
- */
- if (PAGE_SIZE >= 16384 && num_physpages <= 128) {
- sysctl_overcommit_memory = OVERCOMMIT_ALWAYS;
- printk("Turning on overcommit\n");
- }
-}
-
-void free_initmem(void){
-#ifndef CONFIG_XIP_KERNEL
- free_area((unsigned long)(&__init_begin),
- (unsigned long)(&__init_end),
- "init");
-#endif
-}
-
-#ifdef CONFIG_BLK_DEV_INITRD
-
-static int keep_initrd;
-
-void free_initrd_mem(unsigned long start, unsigned long end)
-{
-#ifdef CONFIG_XIP_KERNEL
- /* Only bin initrd if it is in RAM... */
- if(!keep_initrd && start < 0x03000000)
-#else
- if (!keep_initrd)
-#endif
- free_area(start, end, "initrd");
-}
-
-static int __init keepinitrd_setup(char *__unused)
-{
- keep_initrd = 1;
- return 1;
-}
-
-__setup("keepinitrd", keepinitrd_setup);
-#endif
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