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Commit dd1cb3a7 authored by Greg Ungerer's avatar Greg Ungerer Committed by Geert Uytterhoeven
Browse files

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: default avatarGreg Ungerer <gerg@uclinux.org>
Signed-off-by: default avatarGeert Uytterhoeven <geert@linux-m68k.org>
parent 20e42aed

arch/m68k/mm/init.c

+228 −2
Original line number Diff line number Diff line 
/*

 *  linux/arch/m68k/mm/init.c

 *

 *  Copyright (C) 1995  Hamish Macdonald

 *

 *  Contains common initialization routines, specific init code moved

 *  to motorola.c and sun3mmu.c

 */



#include <linux/module.h>

#include <linux/signal.h>

#include <linux/sched.h>

#include <linux/mm.h>

#include <linux/swap.h>

#include <linux/kernel.h>

#include <linux/string.h>

#include <linux/types.h>

#include <linux/init.h>

#include <linux/bootmem.h>

#include <linux/gfp.h>



#include <asm/setup.h>

#include <asm/uaccess.h>

#include <asm/page.h>

#include <asm/pgalloc.h>

#include <asm/traps.h>

#include <asm/machdep.h>

#include <asm/io.h>

#ifdef CONFIG_ATARI

#include <asm/atari_stram.h>

#endif

#include <asm/sections.h>

#include <asm/tlb.h>



/*

 * ZERO_PAGE is a special page that is used for zero-initialized

 * data and COW.

 */

void *empty_zero_page;

EXPORT_SYMBOL(empty_zero_page);



#ifdef CONFIG_MMU

#include "init_mm.c"



pg_data_t pg_data_map[MAX_NUMNODES];

EXPORT_SYMBOL(pg_data_map);



int m68k_virt_to_node_shift;



#ifndef CONFIG_SINGLE_MEMORY_CHUNK

pg_data_t *pg_data_table[65];

EXPORT_SYMBOL(pg_data_table);

#endif



void __init m68k_setup_node(int node)

{

#ifndef CONFIG_SINGLE_MEMORY_CHUNK

	struct mem_info *info = m68k_memory + node;

	int i, end;



	i = (unsigned long)phys_to_virt(info->addr) >> __virt_to_node_shift();

	end = (unsigned long)phys_to_virt(info->addr + info->size - 1) >> __virt_to_node_shift();

	for (; i <= end; i++) {

		if (pg_data_table[i])

			printk("overlap at %u for chunk %u\n", i, node);

		pg_data_table[i] = pg_data_map + node;

	}

#endif

	pg_data_map[node].bdata = bootmem_node_data + node;

	node_set_online(node);

}



extern void init_pointer_table(unsigned long ptable);

extern pmd_t *zero_pgtable;



#else /* CONFIG_MMU */



/*

 * 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, };



	high_memory = (void *) end_mem;



	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 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

}



#endif /* CONFIG_MMU */



#if defined(CONFIG_MMU) && !defined(CONFIG_COLDFIRE)

#define VECTORS	&vectors[0]

#else

#include "init_no.c"

#define VECTORS	_ramvec

#endif



void __init print_memmap(void)

{

#define UL(x) ((unsigned long) (x))

#define MLK(b, t) UL(b), UL(t), (UL(t) - UL(b)) >> 10

#define MLM(b, t) UL(b), UL(t), (UL(t) - UL(b)) >> 20

#define MLK_ROUNDUP(b, t) b, t, DIV_ROUND_UP(((t) - (b)), 1024)



	pr_notice("Virtual kernel memory layout:\n"

		"    vector  : 0x%08lx - 0x%08lx   (%4ld KiB)\n"

		"    kmap    : 0x%08lx - 0x%08lx   (%4ld MiB)\n"

		"    vmalloc : 0x%08lx - 0x%08lx   (%4ld MiB)\n"

		"    lowmem  : 0x%08lx - 0x%08lx   (%4ld MiB)\n"

		"      .init : 0x%p" " - 0x%p" "   (%4d KiB)\n"

		"      .text : 0x%p" " - 0x%p" "   (%4d KiB)\n"

		"      .data : 0x%p" " - 0x%p" "   (%4d KiB)\n"

		"      .bss  : 0x%p" " - 0x%p" "   (%4d KiB)\n",

		MLK(VECTORS, VECTORS + 256),

		MLM(KMAP_START, KMAP_END),

		MLM(VMALLOC_START, VMALLOC_END),

		MLM(PAGE_OFFSET, (unsigned long)high_memory),

		MLK_ROUNDUP(__init_begin, __init_end),

		MLK_ROUNDUP(_stext, _etext),

		MLK_ROUNDUP(_sdata, _edata),

		MLK_ROUNDUP(__bss_start, __bss_stop));

}



void __init mem_init(void)

{

	pg_data_t *pgdat;

	int codepages = 0;

	int datapages = 0;

	int initpages = 0;

	int i;



	/* this will put all memory onto the freelists */

	totalram_pages = num_physpages = 0;

	for_each_online_pgdat(pgdat) {

		num_physpages += pgdat->node_present_pages;



		totalram_pages += free_all_bootmem_node(pgdat);

		for (i = 0; i < pgdat->node_spanned_pages; i++) {

			struct page *page = pgdat->node_mem_map + i;

			char *addr = page_to_virt(page);



			if (!PageReserved(page))

				continue;

			if (addr >= _text &&

			    addr < _etext)

				codepages++;

			else if (addr >= __init_begin &&

				 addr < __init_end)

				initpages++;

			else

				datapages++;

		}

	}



#if !defined(CONFIG_SUN3) && !defined(CONFIG_COLDFIRE)

	/* insert pointer tables allocated so far into the tablelist */

	init_pointer_table((unsigned long)kernel_pg_dir);

	for (i = 0; i < PTRS_PER_PGD; i++) {

		if (pgd_present(kernel_pg_dir[i]))

			init_pointer_table(__pgd_page(kernel_pg_dir[i]));

	}



	/* insert also pointer table that we used to unmap the zero page */

	if (zero_pgtable)

		init_pointer_table((unsigned long)zero_pgtable);

#endif



	pr_info("Memory: %luk/%luk available (%dk kernel code, %dk data, %dk init)\n",

	       nr_free_pages() << (PAGE_SHIFT-10),

	       totalram_pages << (PAGE_SHIFT-10),

	       codepages << (PAGE_SHIFT-10),

	       datapages << (PAGE_SHIFT-10),

	       initpages << (PAGE_SHIFT-10));

	print_memmap();

}



#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: %dk freed\n",

		pages << (PAGE_SHIFT - 10));

}

#endif

arch/m68k/mm/init_mm.c

deleted100644 → 0
+0 −176
Original line number Diff line number Diff line 
/*

 *  linux/arch/m68k/mm/init.c

 *

 *  Copyright (C) 1995  Hamish Macdonald

 *

 *  Contains common initialization routines, specific init code moved

 *  to motorola.c and sun3mmu.c

 */



#include <linux/module.h>

#include <linux/signal.h>

#include <linux/sched.h>

#include <linux/mm.h>

#include <linux/swap.h>

#include <linux/kernel.h>

#include <linux/string.h>

#include <linux/types.h>

#include <linux/init.h>

#include <linux/bootmem.h>

#include <linux/gfp.h>



#include <asm/setup.h>

#include <asm/uaccess.h>

#include <asm/page.h>

#include <asm/pgalloc.h>

#include <asm/traps.h>

#include <asm/machdep.h>

#include <asm/io.h>

#ifdef CONFIG_ATARI

#include <asm/atari_stram.h>

#endif

#include <asm/sections.h>

#include <asm/tlb.h>



pg_data_t pg_data_map[MAX_NUMNODES];

EXPORT_SYMBOL(pg_data_map);



int m68k_virt_to_node_shift;



#ifndef CONFIG_SINGLE_MEMORY_CHUNK

pg_data_t *pg_data_table[65];

EXPORT_SYMBOL(pg_data_table);

#endif



void __init m68k_setup_node(int node)

{

#ifndef CONFIG_SINGLE_MEMORY_CHUNK

	struct mem_info *info = m68k_memory + node;

	int i, end;



	i = (unsigned long)phys_to_virt(info->addr) >> __virt_to_node_shift();

	end = (unsigned long)phys_to_virt(info->addr + info->size - 1) >> __virt_to_node_shift();

	for (; i <= end; i++) {

		if (pg_data_table[i])

			printk("overlap at %u for chunk %u\n", i, node);

		pg_data_table[i] = pg_data_map + node;

	}

#endif

	pg_data_map[node].bdata = bootmem_node_data + node;

	node_set_online(node);

}





/*

 * ZERO_PAGE is a special page that is used for zero-initialized

 * data and COW.

 */



void *empty_zero_page;

EXPORT_SYMBOL(empty_zero_page);



extern void init_pointer_table(unsigned long ptable);



/* References to section boundaries */



extern pmd_t *zero_pgtable;



#if defined(CONFIG_MMU) && !defined(CONFIG_COLDFIRE)

#define VECTORS	&vectors[0]

#else

#define VECTORS	_ramvec

#endif



void __init print_memmap(void)

{

#define UL(x) ((unsigned long) (x))

#define MLK(b, t) UL(b), UL(t), (UL(t) - UL(b)) >> 10

#define MLM(b, t) UL(b), UL(t), (UL(t) - UL(b)) >> 20

#define MLK_ROUNDUP(b, t) b, t, DIV_ROUND_UP(((t) - (b)), 1024)



	pr_notice("Virtual kernel memory layout:\n"

		"    vector  : 0x%08lx - 0x%08lx   (%4ld KiB)\n"

		"    kmap    : 0x%08lx - 0x%08lx   (%4ld MiB)\n"

		"    vmalloc : 0x%08lx - 0x%08lx   (%4ld MiB)\n"

		"    lowmem  : 0x%08lx - 0x%08lx   (%4ld MiB)\n"

		"      .init : 0x%p" " - 0x%p" "   (%4d KiB)\n"

		"      .text : 0x%p" " - 0x%p" "   (%4d KiB)\n"

		"      .data : 0x%p" " - 0x%p" "   (%4d KiB)\n"

		"      .bss  : 0x%p" " - 0x%p" "   (%4d KiB)\n",

		MLK(VECTORS, VECTORS + 256),

		MLM(KMAP_START, KMAP_END),

		MLM(VMALLOC_START, VMALLOC_END),

		MLM(PAGE_OFFSET, (unsigned long)high_memory),

		MLK_ROUNDUP(__init_begin, __init_end),

		MLK_ROUNDUP(_stext, _etext),

		MLK_ROUNDUP(_sdata, _edata),

		MLK_ROUNDUP(__bss_start, __bss_stop));

}



void __init mem_init(void)

{

	pg_data_t *pgdat;

	int codepages = 0;

	int datapages = 0;

	int initpages = 0;

	int i;



	/* this will put all memory onto the freelists */

	totalram_pages = num_physpages = 0;

	for_each_online_pgdat(pgdat) {

		num_physpages += pgdat->node_present_pages;



		totalram_pages += free_all_bootmem_node(pgdat);

		for (i = 0; i < pgdat->node_spanned_pages; i++) {

			struct page *page = pgdat->node_mem_map + i;

			char *addr = page_to_virt(page);



			if (!PageReserved(page))

				continue;

			if (addr >= _text &&

			    addr < _etext)

				codepages++;

			else if (addr >= __init_begin &&

				 addr < __init_end)

				initpages++;

			else

				datapages++;

		}

	}



#if !defined(CONFIG_SUN3) && !defined(CONFIG_COLDFIRE)

	/* insert pointer tables allocated so far into the tablelist */

	init_pointer_table((unsigned long)kernel_pg_dir);

	for (i = 0; i < PTRS_PER_PGD; i++) {

		if (pgd_present(kernel_pg_dir[i]))

			init_pointer_table(__pgd_page(kernel_pg_dir[i]));

	}



	/* insert also pointer table that we used to unmap the zero page */

	if (zero_pgtable)

		init_pointer_table((unsigned long)zero_pgtable);

#endif



	printk("Memory: %luk/%luk available (%dk kernel code, %dk data, %dk init)\n",

	       nr_free_pages() << (PAGE_SHIFT-10),

	       totalram_pages << (PAGE_SHIFT-10),

	       codepages << (PAGE_SHIFT-10),

	       datapages << (PAGE_SHIFT-10),

	       initpages << (PAGE_SHIFT-10));

	print_memmap();

}



#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++;

	}

	printk ("Freeing initrd memory: %dk freed\n", pages);

}

#endif

arch/m68k/mm/init_no.c

deleted100644 → 0
+0 −145
Original line number Diff line number Diff line 
/*

 *  linux/arch/m68knommu/mm/init.c

 *

 *  Copyright (C) 1998  D. Jeff Dionne <jeff@lineo.ca>,

 *                      Kenneth Albanowski <kjahds@kjahds.com>,

 *  Copyright (C) 2000  Lineo, Inc.  (www.lineo.com) 

 *

 *  Based on:

 *

 *  linux/arch/m68k/mm/init.c

 *

 *  Copyright (C) 1995  Hamish Macdonald

 *

 *  JAN/1999 -- hacked to support ColdFire (gerg@snapgear.com)

 *  DEC/2000 -- linux 2.4 support <davidm@snapgear.com>

 */



#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/init.h>

#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

}