m68k: merge MMU and non-MMU versions of mm/init.c
Some of the code in the existing mm/init_mm.c and mm/init_no.c files is the same, and if we merge them back to a single file we can save some code duplication. Although the old mem_init() code for non-MMU was a little different than the MMU version, it turns out we can use the same code. So I now we just use the MMU mem_init() code for all. It also means we now get identical console info messages for this code on kernel boot up. So merge the two files back into a single file. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
This commit is contained in:
Greg Ungerer
Geert Uytterhoeven
parent
20e42aede9
commit
dd1cb3a7c4
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@ -1,5 +1,231 @@
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#ifdef CONFIG_MMU
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#include "init_mm.c"
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#else
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#include "init_no.c"
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/*
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* linux/arch/m68k/mm/init.c
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*
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* Copyright (C) 1995 Hamish Macdonald
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*
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* Contains common initialization routines, specific init code moved
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* to motorola.c and sun3mmu.c
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*/
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#include <linux/module.h>
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#include <linux/signal.h>
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#include <linux/sched.h>
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#include <linux/mm.h>
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#include <linux/swap.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/types.h>
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#include <linux/init.h>
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#include <linux/bootmem.h>
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#include <linux/gfp.h>
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#include <asm/setup.h>
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#include <asm/uaccess.h>
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#include <asm/page.h>
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#include <asm/pgalloc.h>
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#include <asm/traps.h>
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#include <asm/machdep.h>
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#include <asm/io.h>
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#ifdef CONFIG_ATARI
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#include <asm/atari_stram.h>
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#endif
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#include <asm/sections.h>
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#include <asm/tlb.h>
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/*
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* ZERO_PAGE is a special page that is used for zero-initialized
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* data and COW.
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*/
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void *empty_zero_page;
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EXPORT_SYMBOL(empty_zero_page);
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#ifdef CONFIG_MMU
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pg_data_t pg_data_map[MAX_NUMNODES];
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EXPORT_SYMBOL(pg_data_map);
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int m68k_virt_to_node_shift;
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#ifndef CONFIG_SINGLE_MEMORY_CHUNK
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pg_data_t *pg_data_table[65];
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EXPORT_SYMBOL(pg_data_table);
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#endif
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void __init m68k_setup_node(int node)
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{
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#ifndef CONFIG_SINGLE_MEMORY_CHUNK
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struct mem_info *info = m68k_memory + node;
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int i, end;
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i = (unsigned long)phys_to_virt(info->addr) >> __virt_to_node_shift();
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end = (unsigned long)phys_to_virt(info->addr + info->size - 1) >> __virt_to_node_shift();
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for (; i <= end; i++) {
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if (pg_data_table[i])
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printk("overlap at %u for chunk %u\n", i, node);
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pg_data_table[i] = pg_data_map + node;
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}
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#endif
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pg_data_map[node].bdata = bootmem_node_data + node;
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node_set_online(node);
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}
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extern void init_pointer_table(unsigned long ptable);
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extern pmd_t *zero_pgtable;
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#else /* CONFIG_MMU */
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/*
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* paging_init() continues the virtual memory environment setup which
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* was begun by the code in arch/head.S.
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* The parameters are pointers to where to stick the starting and ending
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* addresses of available kernel virtual memory.
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*/
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void __init paging_init(void)
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{
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/*
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* Make sure start_mem is page aligned, otherwise bootmem and
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* page_alloc get different views of the world.
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*/
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unsigned long end_mem = memory_end & PAGE_MASK;
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unsigned long zones_size[MAX_NR_ZONES] = { 0, };
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high_memory = (void *) end_mem;
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empty_zero_page = alloc_bootmem_pages(PAGE_SIZE);
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memset(empty_zero_page, 0, PAGE_SIZE);
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/*
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* Set up SFC/DFC registers (user data space).
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*/
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set_fs (USER_DS);
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zones_size[ZONE_DMA] = (end_mem - PAGE_OFFSET) >> PAGE_SHIFT;
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free_area_init(zones_size);
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}
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void free_initmem(void)
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{
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#ifdef CONFIG_RAMKERNEL
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unsigned long addr;
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/*
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* The following code should be cool even if these sections
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* are not page aligned.
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*/
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addr = PAGE_ALIGN((unsigned long) __init_begin);
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/* next to check that the page we free is not a partial page */
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for (; addr + PAGE_SIZE < ((unsigned long) __init_end); addr += PAGE_SIZE) {
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ClearPageReserved(virt_to_page(addr));
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init_page_count(virt_to_page(addr));
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free_page(addr);
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totalram_pages++;
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}
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pr_notice("Freeing unused kernel memory: %luk freed (0x%x - 0x%x)\n",
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(addr - PAGE_ALIGN((unsigned long) __init_begin)) >> 10,
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(int)(PAGE_ALIGN((unsigned long) __init_begin)),
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(int)(addr - PAGE_SIZE));
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#endif
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}
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#endif /* CONFIG_MMU */
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#if defined(CONFIG_MMU) && !defined(CONFIG_COLDFIRE)
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#define VECTORS &vectors[0]
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#else
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#define VECTORS _ramvec
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#endif
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void __init print_memmap(void)
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{
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#define UL(x) ((unsigned long) (x))
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#define MLK(b, t) UL(b), UL(t), (UL(t) - UL(b)) >> 10
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#define MLM(b, t) UL(b), UL(t), (UL(t) - UL(b)) >> 20
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#define MLK_ROUNDUP(b, t) b, t, DIV_ROUND_UP(((t) - (b)), 1024)
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pr_notice("Virtual kernel memory layout:\n"
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" vector : 0x%08lx - 0x%08lx (%4ld KiB)\n"
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" kmap : 0x%08lx - 0x%08lx (%4ld MiB)\n"
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" vmalloc : 0x%08lx - 0x%08lx (%4ld MiB)\n"
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" lowmem : 0x%08lx - 0x%08lx (%4ld MiB)\n"
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" .init : 0x%p" " - 0x%p" " (%4d KiB)\n"
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" .text : 0x%p" " - 0x%p" " (%4d KiB)\n"
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" .data : 0x%p" " - 0x%p" " (%4d KiB)\n"
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" .bss : 0x%p" " - 0x%p" " (%4d KiB)\n",
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MLK(VECTORS, VECTORS + 256),
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MLM(KMAP_START, KMAP_END),
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MLM(VMALLOC_START, VMALLOC_END),
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MLM(PAGE_OFFSET, (unsigned long)high_memory),
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MLK_ROUNDUP(__init_begin, __init_end),
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MLK_ROUNDUP(_stext, _etext),
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MLK_ROUNDUP(_sdata, _edata),
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MLK_ROUNDUP(__bss_start, __bss_stop));
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}
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void __init mem_init(void)
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{
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pg_data_t *pgdat;
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int codepages = 0;
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int datapages = 0;
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int initpages = 0;
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int i;
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/* this will put all memory onto the freelists */
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totalram_pages = num_physpages = 0;
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for_each_online_pgdat(pgdat) {
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num_physpages += pgdat->node_present_pages;
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totalram_pages += free_all_bootmem_node(pgdat);
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for (i = 0; i < pgdat->node_spanned_pages; i++) {
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struct page *page = pgdat->node_mem_map + i;
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char *addr = page_to_virt(page);
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if (!PageReserved(page))
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continue;
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if (addr >= _text &&
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addr < _etext)
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codepages++;
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else if (addr >= __init_begin &&
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addr < __init_end)
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initpages++;
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else
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datapages++;
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}
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}
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#if !defined(CONFIG_SUN3) && !defined(CONFIG_COLDFIRE)
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/* insert pointer tables allocated so far into the tablelist */
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init_pointer_table((unsigned long)kernel_pg_dir);
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for (i = 0; i < PTRS_PER_PGD; i++) {
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if (pgd_present(kernel_pg_dir[i]))
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init_pointer_table(__pgd_page(kernel_pg_dir[i]));
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}
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/* insert also pointer table that we used to unmap the zero page */
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if (zero_pgtable)
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init_pointer_table((unsigned long)zero_pgtable);
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#endif
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pr_info("Memory: %luk/%luk available (%dk kernel code, %dk data, %dk init)\n",
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nr_free_pages() << (PAGE_SHIFT-10),
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totalram_pages << (PAGE_SHIFT-10),
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codepages << (PAGE_SHIFT-10),
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datapages << (PAGE_SHIFT-10),
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initpages << (PAGE_SHIFT-10));
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print_memmap();
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}
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#ifdef CONFIG_BLK_DEV_INITRD
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void free_initrd_mem(unsigned long start, unsigned long end)
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{
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int pages = 0;
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for (; start < end; start += PAGE_SIZE) {
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ClearPageReserved(virt_to_page(start));
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init_page_count(virt_to_page(start));
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free_page(start);
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totalram_pages++;
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pages++;
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}
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pr_notice("Freeing initrd memory: %dk freed\n",
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pages << (PAGE_SHIFT - 10));
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}
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#endif
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@ -1,176 +0,0 @@
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/*
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* linux/arch/m68k/mm/init.c
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*
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* Copyright (C) 1995 Hamish Macdonald
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*
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* Contains common initialization routines, specific init code moved
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* to motorola.c and sun3mmu.c
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*/
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#include <linux/module.h>
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#include <linux/signal.h>
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#include <linux/sched.h>
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#include <linux/mm.h>
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#include <linux/swap.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/types.h>
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#include <linux/init.h>
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#include <linux/bootmem.h>
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#include <linux/gfp.h>
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#include <asm/setup.h>
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#include <asm/uaccess.h>
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#include <asm/page.h>
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#include <asm/pgalloc.h>
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#include <asm/traps.h>
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#include <asm/machdep.h>
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#include <asm/io.h>
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#ifdef CONFIG_ATARI
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#include <asm/atari_stram.h>
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#endif
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#include <asm/sections.h>
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#include <asm/tlb.h>
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pg_data_t pg_data_map[MAX_NUMNODES];
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EXPORT_SYMBOL(pg_data_map);
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int m68k_virt_to_node_shift;
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#ifndef CONFIG_SINGLE_MEMORY_CHUNK
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pg_data_t *pg_data_table[65];
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EXPORT_SYMBOL(pg_data_table);
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#endif
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void __init m68k_setup_node(int node)
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{
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#ifndef CONFIG_SINGLE_MEMORY_CHUNK
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struct mem_info *info = m68k_memory + node;
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int i, end;
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i = (unsigned long)phys_to_virt(info->addr) >> __virt_to_node_shift();
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end = (unsigned long)phys_to_virt(info->addr + info->size - 1) >> __virt_to_node_shift();
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for (; i <= end; i++) {
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if (pg_data_table[i])
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printk("overlap at %u for chunk %u\n", i, node);
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pg_data_table[i] = pg_data_map + node;
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}
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#endif
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pg_data_map[node].bdata = bootmem_node_data + node;
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node_set_online(node);
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}
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/*
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* ZERO_PAGE is a special page that is used for zero-initialized
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* data and COW.
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*/
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void *empty_zero_page;
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EXPORT_SYMBOL(empty_zero_page);
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extern void init_pointer_table(unsigned long ptable);
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/* References to section boundaries */
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extern pmd_t *zero_pgtable;
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#if defined(CONFIG_MMU) && !defined(CONFIG_COLDFIRE)
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#define VECTORS &vectors[0]
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#else
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#define VECTORS _ramvec
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#endif
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void __init print_memmap(void)
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{
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#define UL(x) ((unsigned long) (x))
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#define MLK(b, t) UL(b), UL(t), (UL(t) - UL(b)) >> 10
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#define MLM(b, t) UL(b), UL(t), (UL(t) - UL(b)) >> 20
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#define MLK_ROUNDUP(b, t) b, t, DIV_ROUND_UP(((t) - (b)), 1024)
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pr_notice("Virtual kernel memory layout:\n"
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" vector : 0x%08lx - 0x%08lx (%4ld KiB)\n"
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" kmap : 0x%08lx - 0x%08lx (%4ld MiB)\n"
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" vmalloc : 0x%08lx - 0x%08lx (%4ld MiB)\n"
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" lowmem : 0x%08lx - 0x%08lx (%4ld MiB)\n"
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" .init : 0x%p" " - 0x%p" " (%4d KiB)\n"
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" .text : 0x%p" " - 0x%p" " (%4d KiB)\n"
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" .data : 0x%p" " - 0x%p" " (%4d KiB)\n"
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" .bss : 0x%p" " - 0x%p" " (%4d KiB)\n",
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MLK(VECTORS, VECTORS + 256),
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MLM(KMAP_START, KMAP_END),
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MLM(VMALLOC_START, VMALLOC_END),
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MLM(PAGE_OFFSET, (unsigned long)high_memory),
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MLK_ROUNDUP(__init_begin, __init_end),
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MLK_ROUNDUP(_stext, _etext),
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MLK_ROUNDUP(_sdata, _edata),
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MLK_ROUNDUP(__bss_start, __bss_stop));
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}
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void __init mem_init(void)
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{
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pg_data_t *pgdat;
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int codepages = 0;
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int datapages = 0;
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int initpages = 0;
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int i;
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/* this will put all memory onto the freelists */
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totalram_pages = num_physpages = 0;
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for_each_online_pgdat(pgdat) {
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num_physpages += pgdat->node_present_pages;
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totalram_pages += free_all_bootmem_node(pgdat);
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for (i = 0; i < pgdat->node_spanned_pages; i++) {
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struct page *page = pgdat->node_mem_map + i;
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char *addr = page_to_virt(page);
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if (!PageReserved(page))
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continue;
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if (addr >= _text &&
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addr < _etext)
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codepages++;
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else if (addr >= __init_begin &&
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addr < __init_end)
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initpages++;
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else
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datapages++;
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}
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}
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#if !defined(CONFIG_SUN3) && !defined(CONFIG_COLDFIRE)
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/* insert pointer tables allocated so far into the tablelist */
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init_pointer_table((unsigned long)kernel_pg_dir);
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for (i = 0; i < PTRS_PER_PGD; i++) {
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if (pgd_present(kernel_pg_dir[i]))
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init_pointer_table(__pgd_page(kernel_pg_dir[i]));
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}
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/* insert also pointer table that we used to unmap the zero page */
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if (zero_pgtable)
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init_pointer_table((unsigned long)zero_pgtable);
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#endif
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printk("Memory: %luk/%luk available (%dk kernel code, %dk data, %dk init)\n",
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nr_free_pages() << (PAGE_SHIFT-10),
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totalram_pages << (PAGE_SHIFT-10),
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codepages << (PAGE_SHIFT-10),
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datapages << (PAGE_SHIFT-10),
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initpages << (PAGE_SHIFT-10));
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print_memmap();
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}
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#ifdef CONFIG_BLK_DEV_INITRD
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void free_initrd_mem(unsigned long start, unsigned long end)
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{
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int pages = 0;
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for (; start < end; start += PAGE_SIZE) {
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ClearPageReserved(virt_to_page(start));
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init_page_count(virt_to_page(start));
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free_page(start);
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totalram_pages++;
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pages++;
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}
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printk ("Freeing initrd memory: %dk freed\n", pages);
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}
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#endif
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@ -1,145 +0,0 @@
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/*
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* linux/arch/m68knommu/mm/init.c
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*
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* Copyright (C) 1998 D. Jeff Dionne <jeff@lineo.ca>,
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* Kenneth Albanowski <kjahds@kjahds.com>,
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* Copyright (C) 2000 Lineo, Inc. (www.lineo.com)
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*
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* Based on:
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*
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* linux/arch/m68k/mm/init.c
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*
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* Copyright (C) 1995 Hamish Macdonald
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*
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* JAN/1999 -- hacked to support ColdFire (gerg@snapgear.com)
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* DEC/2000 -- linux 2.4 support <davidm@snapgear.com>
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*/
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#include <linux/signal.h>
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#include <linux/sched.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/string.h>
|
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#include <linux/types.h>
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#include <linux/ptrace.h>
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#include <linux/mman.h>
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#include <linux/mm.h>
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#include <linux/swap.h>
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#include <linux/init.h>
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#include <linux/highmem.h>
|
||||
#include <linux/pagemap.h>
|
||||
#include <linux/bootmem.h>
|
||||
#include <linux/gfp.h>
|
||||
|
||||
#include <asm/setup.h>
|
||||
#include <asm/sections.h>
|
||||
#include <asm/segment.h>
|
||||
#include <asm/page.h>
|
||||
#include <asm/pgtable.h>
|
||||
#include <asm/machdep.h>
|
||||
|
||||
/*
|
||||
* ZERO_PAGE is a special page that is used for zero-initialized
|
||||
* data and COW.
|
||||
*/
|
||||
void *empty_zero_page;
|
||||
|
||||
/*
|
||||
* paging_init() continues the virtual memory environment setup which
|
||||
* was begun by the code in arch/head.S.
|
||||
* The parameters are pointers to where to stick the starting and ending
|
||||
* addresses of available kernel virtual memory.
|
||||
*/
|
||||
void __init paging_init(void)
|
||||
{
|
||||
/*
|
||||
* Make sure start_mem is page aligned, otherwise bootmem and
|
||||
* page_alloc get different views of the world.
|
||||
*/
|
||||
unsigned long end_mem = memory_end & PAGE_MASK;
|
||||
unsigned long zones_size[MAX_NR_ZONES] = {0, };
|
||||
|
||||
empty_zero_page = alloc_bootmem_pages(PAGE_SIZE);
|
||||
memset(empty_zero_page, 0, PAGE_SIZE);
|
||||
|
||||
/*
|
||||
* Set up SFC/DFC registers (user data space).
|
||||
*/
|
||||
set_fs (USER_DS);
|
||||
|
||||
zones_size[ZONE_DMA] = (end_mem - PAGE_OFFSET) >> PAGE_SHIFT;
|
||||
free_area_init(zones_size);
|
||||
}
|
||||
|
||||
void __init mem_init(void)
|
||||
{
|
||||
int codek = 0, datak = 0, initk = 0;
|
||||
unsigned long tmp;
|
||||
unsigned long len = _ramend - _rambase;
|
||||
unsigned long start_mem = memory_start; /* DAVIDM - these must start at end of kernel */
|
||||
unsigned long end_mem = memory_end; /* DAVIDM - this must not include kernel stack at top */
|
||||
|
||||
pr_debug("Mem_init: start=%lx, end=%lx\n", start_mem, end_mem);
|
||||
|
||||
end_mem &= PAGE_MASK;
|
||||
high_memory = (void *) end_mem;
|
||||
|
||||
start_mem = PAGE_ALIGN(start_mem);
|
||||
max_mapnr = num_physpages = (((unsigned long) high_memory) - PAGE_OFFSET) >> PAGE_SHIFT;
|
||||
|
||||
/* this will put all memory onto the freelists */
|
||||
totalram_pages = free_all_bootmem();
|
||||
|
||||
codek = (_etext - _stext) >> 10;
|
||||
datak = (__bss_stop - _sdata) >> 10;
|
||||
initk = (__init_begin - __init_end) >> 10;
|
||||
|
||||
tmp = nr_free_pages() << PAGE_SHIFT;
|
||||
printk(KERN_INFO "Memory available: %luk/%luk RAM, (%dk kernel code, %dk data)\n",
|
||||
tmp >> 10,
|
||||
len >> 10,
|
||||
codek,
|
||||
datak
|
||||
);
|
||||
}
|
||||
|
||||
|
||||
#ifdef CONFIG_BLK_DEV_INITRD
|
||||
void free_initrd_mem(unsigned long start, unsigned long end)
|
||||
{
|
||||
int pages = 0;
|
||||
for (; start < end; start += PAGE_SIZE) {
|
||||
ClearPageReserved(virt_to_page(start));
|
||||
init_page_count(virt_to_page(start));
|
||||
free_page(start);
|
||||
totalram_pages++;
|
||||
pages++;
|
||||
}
|
||||
pr_notice("Freeing initrd memory: %luk freed\n",
|
||||
pages * (PAGE_SIZE / 1024));
|
||||
}
|
||||
#endif
|
||||
|
||||
void free_initmem(void)
|
||||
{
|
||||
#ifdef CONFIG_RAMKERNEL
|
||||
unsigned long addr;
|
||||
/*
|
||||
* The following code should be cool even if these sections
|
||||
* are not page aligned.
|
||||
*/
|
||||
addr = PAGE_ALIGN((unsigned long) __init_begin);
|
||||
/* next to check that the page we free is not a partial page */
|
||||
for (; addr + PAGE_SIZE < ((unsigned long) __init_end); addr += PAGE_SIZE) {
|
||||
ClearPageReserved(virt_to_page(addr));
|
||||
init_page_count(virt_to_page(addr));
|
||||
free_page(addr);
|
||||
totalram_pages++;
|
||||
}
|
||||
pr_notice("Freeing unused kernel memory: %luk freed (0x%x - 0x%x)\n",
|
||||
(addr - PAGE_ALIGN((unsigned long) __init_begin)) >> 10,
|
||||
(int)(PAGE_ALIGN((unsigned long) __init_begin)),
|
||||
(int)(addr - PAGE_SIZE));
|
||||
#endif
|
||||
}
|
||||
|
||||
Reference in New Issue