sh: Kill off arch/sh64/mm.

#

# This file is subject to the terms and conditions of the GNU General Public

# License.  See the file "COPYING" in the main directory of this archive

# for more details.

#

# Copyright (C) 2000, 2001  Paolo Alberelli

# Copyright (C) 2003, 2004  Paul Mundt

#

# Makefile for the sh64-specific parts of the Linux memory manager.

#

# Note! Dependencies are done automagically by 'make dep', which also

# removes any old dependencies. DON'T put your own dependencies here

# unless it's something special (ie not a .c file).

#

obj-y := cache.o consistent.o extable.o fault.o init.o ioremap.o \

	 tlbmiss.o tlb.o

obj-$(CONFIG_HUGETLB_PAGE)	+= hugetlbpage.o

# Special flags for tlbmiss.o.  This puts restrictions on the number of

# caller-save registers that the compiler can target when building this file.

# This is required because the code is called from a context in entry.S where

# very few registers have been saved in the exception handler (for speed

# reasons).

# The caller save registers that have been saved and which can be used are

# r2,r3,r4,r5 : argument passing

# r15, r18 : SP and LINK

# tr0-4 : allow all caller-save TR's.  The compiler seems to be able to make

#         use of them, so it's probably beneficial to performance to save them

#         and have them available for it.

#

# The resources not listed below are callee save, i.e. the compiler is free to

# use any of them and will spill them to the stack itself.

CFLAGS_tlbmiss.o += -ffixed-r7 \

	-ffixed-r8 -ffixed-r9 -ffixed-r10 -ffixed-r11 -ffixed-r12 \

	-ffixed-r13 -ffixed-r14 -ffixed-r16 -ffixed-r17 -ffixed-r19 \

	-ffixed-r20 -ffixed-r21 -ffixed-r22 -ffixed-r23 \

	-ffixed-r24 -ffixed-r25 -ffixed-r26 -ffixed-r27 \

	-ffixed-r36 -ffixed-r37 -ffixed-r38 -ffixed-r39 -ffixed-r40 \

	-ffixed-r41 -ffixed-r42 -ffixed-r43  \

	-ffixed-r60 -ffixed-r61 -ffixed-r62 \

	-fomit-frame-pointer

/*

 * Copyright (C) 2001 David J. Mckay (david.mckay@st.com)

 * Copyright (C) 2003 Paul Mundt (lethal@linux-sh.org)

 *

 * May be copied or modified under the terms of the GNU General Public

 * License.  See linux/COPYING for more information.

 *

 * Dynamic DMA mapping support.

 */

#include <linux/types.h>

#include <linux/mm.h>

#include <linux/string.h>

#include <linux/pci.h>

#include <linux/dma-mapping.h>

#include <linux/module.h>

#include <asm/io.h>

void *consistent_alloc(struct pci_dev *hwdev, size_t size,

			   dma_addr_t *dma_handle)

{

	void *ret;

	int gfp = GFP_ATOMIC;

        void *vp;

	if (hwdev == NULL || hwdev->dma_mask != 0xffffffff)

		gfp |= GFP_DMA;

	ret = (void *)__get_free_pages(gfp, get_order(size));

	/* now call our friend ioremap_nocache to give us an uncached area */

        vp = ioremap_nocache(virt_to_phys(ret), size);

	if (vp != NULL) {

		memset(vp, 0, size);

		*dma_handle = virt_to_phys(ret);

		dma_cache_sync(NULL, ret, size, DMA_BIDIRECTIONAL);

	}

	return vp;

}

EXPORT_SYMBOL(consistent_alloc);

void consistent_free(struct pci_dev *hwdev, size_t size,

			 void *vaddr, dma_addr_t dma_handle)

{

	void *alloc;

	alloc = phys_to_virt((unsigned long)dma_handle);

	free_pages((unsigned long)alloc, get_order(size));

	iounmap(vaddr);

}

EXPORT_SYMBOL(consistent_free);

/*

 * arch/sh64/mm/hugetlbpage.c

 *

 * SuperH HugeTLB page support.

 *

 * Cloned from sparc64 by Paul Mundt.

 *

 * Copyright (C) 2002, 2003 David S. Miller (davem@redhat.com)

 */

#include <linux/init.h>

#include <linux/fs.h>

#include <linux/mm.h>

#include <linux/hugetlb.h>

#include <linux/pagemap.h>

#include <linux/slab.h>

#include <linux/sysctl.h>

#include <asm/mman.h>

#include <asm/pgalloc.h>

#include <asm/tlb.h>

#include <asm/tlbflush.h>

#include <asm/cacheflush.h>

pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr)

{

	pgd_t *pgd;

	pmd_t *pmd;

	pte_t *pte = NULL;

	pgd = pgd_offset(mm, addr);

	if (pgd) {

		pmd = pmd_alloc(mm, pgd, addr);

		if (pmd)

			pte = pte_alloc_map(mm, pmd, addr);

	}

	return pte;

}

pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr)

{

	pgd_t *pgd;

	pmd_t *pmd;

	pte_t *pte = NULL;

	pgd = pgd_offset(mm, addr);

	if (pgd) {

		pmd = pmd_offset(pgd, addr);

		if (pmd)

			pte = pte_offset_map(pmd, addr);

	}

	return pte;

}

int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep)

{

	return 0;

}

void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,

		     pte_t *ptep, pte_t entry)

{

	int i;

	for (i = 0; i < (1 << HUGETLB_PAGE_ORDER); i++) {

		set_pte_at(mm, addr, ptep, entry);

		ptep++;

		addr += PAGE_SIZE;

		pte_val(entry) += PAGE_SIZE;

	}

}

pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,

			      pte_t *ptep)

{

	pte_t entry;

	int i;

	entry = *ptep;

	for (i = 0; i < (1 << HUGETLB_PAGE_ORDER); i++) {

		pte_clear(mm, addr, ptep);

		addr += PAGE_SIZE;

		ptep++;

	}

	return entry;

}

struct page *follow_huge_addr(struct mm_struct *mm,

			      unsigned long address, int write)

{

	return ERR_PTR(-EINVAL);

}

int pmd_huge(pmd_t pmd)

{

	return 0;

}

struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address,

			     pmd_t *pmd, int write)

{

	return NULL;

}

/*

 * This file is subject to the terms and conditions of the GNU General Public

 * License.  See the file "COPYING" in the main directory of this archive

 * for more details.

 *

 * arch/sh64/mm/init.c

 *

 * Copyright (C) 2000, 2001  Paolo Alberelli

 * Copyright (C) 2003, 2004  Paul Mundt

 *

 */

#include <linux/init.h>

#include <linux/rwsem.h>

#include <linux/mm.h>

#include <linux/swap.h>

#include <linux/bootmem.h>

#include <asm/mmu_context.h>

#include <asm/page.h>

#include <asm/pgalloc.h>

#include <asm/pgtable.h>

#include <asm/tlb.h>

DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);

/*

 * Cache of MMU context last used.

 */

unsigned long mmu_context_cache;

pgd_t * mmu_pdtp_cache;

int after_bootmem = 0;

/*

 * BAD_PAGE is the page that is used for page faults when linux

 * is out-of-memory. Older versions of linux just did a

 * do_exit(), but using this instead means there is less risk

 * for a process dying in kernel mode, possibly leaving an inode

 * unused etc..

 *

 * BAD_PAGETABLE is the accompanying page-table: it is initialized

 * to point to BAD_PAGE entries.

 *

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

 * data and COW.

 */

extern unsigned char empty_zero_page[PAGE_SIZE];

extern unsigned char empty_bad_page[PAGE_SIZE];

extern pte_t empty_bad_pte_table[PTRS_PER_PTE];

extern pgd_t swapper_pg_dir[PTRS_PER_PGD];

extern char _text, _etext, _edata, __bss_start, _end;

extern char __init_begin, __init_end;

/* It'd be good if these lines were in the standard header file. */

#define START_PFN	(NODE_DATA(0)->bdata->node_boot_start >> PAGE_SHIFT)

#define MAX_LOW_PFN	(NODE_DATA(0)->bdata->node_low_pfn)

void show_mem(void)

{

	int i, total = 0, reserved = 0;

	int shared = 0, cached = 0;

	printk("Mem-info:\n");

	show_free_areas();

	printk("Free swap:       %6ldkB\n",nr_swap_pages<<(PAGE_SHIFT-10));

	i = max_mapnr;

	while (i-- > 0) {

		total++;

		if (PageReserved(mem_map+i))

			reserved++;

		else if (PageSwapCache(mem_map+i))

			cached++;

		else if (page_count(mem_map+i))

			shared += page_count(mem_map+i) - 1;

	}

	printk("%d pages of RAM\n",total);

	printk("%d reserved pages\n",reserved);

	printk("%d pages shared\n",shared);

	printk("%d pages swap cached\n",cached);

	printk("%ld pages in page table cache\n", quicklist_total_size());

}

/*

 * paging_init() sets up the page tables.

 *

 * head.S already did a lot to set up address translation for the kernel.

 * Here we comes with:

 * . MMU enabled

 * . ASID set (SR)

 * .  some 512MB regions being mapped of which the most relevant here is:

 *   . CACHED segment (ASID 0 [irrelevant], shared AND NOT user)

 * . possible variable length regions being mapped as:

 *   . UNCACHED segment (ASID 0 [irrelevant], shared AND NOT user)

 * . All of the memory regions are placed, independently from the platform

 *   on high addresses, above 0x80000000.

 * . swapper_pg_dir is already cleared out by the .space directive

 *   in any case swapper does not require a real page directory since

 *   it's all kernel contained.

 *

 * Those pesky NULL-reference errors in the kernel are then

 * dealt with by not mapping address 0x00000000 at all.

 *

 */

void __init paging_init(void)

{

	unsigned long zones_size[MAX_NR_ZONES] = {0, };

	pgd_init((unsigned long)swapper_pg_dir);

	pgd_init((unsigned long)swapper_pg_dir +

		 sizeof(pgd_t) * USER_PTRS_PER_PGD);

	mmu_context_cache = MMU_CONTEXT_FIRST_VERSION;

	zones_size[ZONE_NORMAL] = MAX_LOW_PFN - START_PFN;

	NODE_DATA(0)->node_mem_map = NULL;

	free_area_init_node(0, NODE_DATA(0), zones_size, __MEMORY_START >> PAGE_SHIFT, 0);

}

void __init mem_init(void)

{

	int codesize, reservedpages, datasize, initsize;

	int tmp;

	max_mapnr = num_physpages = MAX_LOW_PFN - START_PFN;

	high_memory = (void *)__va(MAX_LOW_PFN * PAGE_SIZE);

	/*

         * Clear the zero-page.

         * This is not required but we might want to re-use

         * this very page to pass boot parameters, one day.

         */

	memset(empty_zero_page, 0, PAGE_SIZE);

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

	totalram_pages += free_all_bootmem_node(NODE_DATA(0));

	reservedpages = 0;

	for (tmp = 0; tmp < num_physpages; tmp++)

		/*

		 * Only count reserved RAM pages

		 */

		if (PageReserved(mem_map+tmp))

			reservedpages++;

	after_bootmem = 1;

	codesize =  (unsigned long) &_etext - (unsigned long) &_text;

	datasize =  (unsigned long) &_edata - (unsigned long) &_etext;

	initsize =  (unsigned long) &__init_end - (unsigned long) &__init_begin;

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

		(unsigned long) nr_free_pages() << (PAGE_SHIFT-10),

		max_mapnr << (PAGE_SHIFT-10),

		codesize >> 10,

		reservedpages << (PAGE_SHIFT-10),

		datasize >> 10,

		initsize >> 10);

}

void free_initmem(void)

{

	unsigned long addr;

	addr = (unsigned long)(&__init_begin);

	for (; addr < (unsigned long)(&__init_end); addr += PAGE_SIZE) {

		ClearPageReserved(virt_to_page(addr));

		init_page_count(virt_to_page(addr));

		free_page(addr);

		totalram_pages++;

	}

	printk ("Freeing unused kernel memory: %ldk freed\n", (&__init_end - &__init_begin) >> 10);

}

#ifdef CONFIG_BLK_DEV_INITRD

void free_initrd_mem(unsigned long start, unsigned long end)

{

	unsigned long p;

	for (p = start; p < end; p += PAGE_SIZE) {

		ClearPageReserved(virt_to_page(p));

		init_page_count(virt_to_page(p));

		free_page(p);

		totalram_pages++;

	}

	printk ("Freeing initrd memory: %ldk freed\n", (end - start) >> 10);

}

#endif