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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/h8300/mm | |
download | kernel_samsung_smdk4412-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip kernel_samsung_smdk4412-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz kernel_samsung_smdk4412-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.bz2 |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'arch/h8300/mm')
-rw-r--r-- | arch/h8300/mm/Makefile | 5 | ||||
-rw-r--r-- | arch/h8300/mm/fault.c | 58 | ||||
-rw-r--r-- | arch/h8300/mm/init.c | 232 | ||||
-rw-r--r-- | arch/h8300/mm/kmap.c | 59 | ||||
-rw-r--r-- | arch/h8300/mm/memory.c | 70 |
5 files changed, 424 insertions, 0 deletions
diff --git a/arch/h8300/mm/Makefile b/arch/h8300/mm/Makefile new file mode 100644 index 0000000..5f4bc42 --- /dev/null +++ b/arch/h8300/mm/Makefile @@ -0,0 +1,5 @@ +# +# Makefile for the linux m68k-specific parts of the memory manager. +# + +obj-y := init.o fault.o memory.o kmap.o diff --git a/arch/h8300/mm/fault.c b/arch/h8300/mm/fault.c new file mode 100644 index 0000000..29e9af9 --- /dev/null +++ b/arch/h8300/mm/fault.c @@ -0,0 +1,58 @@ +/* + * linux/arch/h8300/mm/fault.c + * + * Copyright (C) 1998 D. Jeff Dionne <jeff@lineo.ca>, + * Copyright (C) 2000 Lineo, Inc. (www.lineo.com) + * + * Based on: + * + * linux/arch/m68knommu/mm/fault.c + * linux/arch/m68k/mm/fault.c + * + * Copyright (C) 1995 Hamish Macdonald + */ + +#include <linux/mman.h> +#include <linux/mm.h> +#include <linux/kernel.h> +#include <linux/ptrace.h> + +#include <asm/system.h> +#include <asm/pgtable.h> + +extern void die_if_kernel(char *, struct pt_regs *, long); + +/* + * This routine handles page faults. It determines the problem, and + * then passes it off to one of the appropriate routines. + * + * error_code: + * bit 0 == 0 means no page found, 1 means protection fault + * bit 1 == 0 means read, 1 means write + * + * If this routine detects a bad access, it returns 1, otherwise it + * returns 0. + */ +asmlinkage int do_page_fault(struct pt_regs *regs, unsigned long address, + unsigned long error_code) +{ +#ifdef DEBUG + printk ("regs->sr=%#x, regs->pc=%#lx, address=%#lx, %ld\n", + regs->sr, regs->pc, address, error_code); +#endif + +/* + * Oops. The kernel tried to access some bad page. We'll have to + * terminate things with extreme prejudice. + */ + if ((unsigned long) address < PAGE_SIZE) { + printk(KERN_ALERT "Unable to handle kernel NULL pointer dereference"); + } else + printk(KERN_ALERT "Unable to handle kernel access"); + printk(" at virtual address %08lx\n",address); + die_if_kernel("Oops", regs, error_code); + do_exit(SIGKILL); + + return 1; +} + diff --git a/arch/h8300/mm/init.c b/arch/h8300/mm/init.c new file mode 100644 index 0000000..1e0929d --- /dev/null +++ b/arch/h8300/mm/init.c @@ -0,0 +1,232 @@ +/* + * linux/arch/h8300/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/m68knommu/mm/init.c + * 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/config.h> +#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/slab.h> + +#include <asm/setup.h> +#include <asm/segment.h> +#include <asm/page.h> +#include <asm/pgtable.h> +#include <asm/system.h> + +#undef DEBUG + +extern void die_if_kernel(char *,struct pt_regs *,long); +extern void free_initmem(void); + +/* + * 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 a 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. + */ +static unsigned long empty_bad_page_table; + +static unsigned long empty_bad_page; + +unsigned long empty_zero_page; + +extern unsigned long rom_length; + +void show_mem(void) +{ + unsigned long i; + int free = 0, total = 0, reserved = 0, shared = 0; + int cached = 0; + + printk("\nMem-info:\n"); + show_free_areas(); + 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)) + free++; + else + shared += page_count(mem_map+i) - 1; + } + printk("%d pages of RAM\n",total); + printk("%d free pages\n",free); + printk("%d reserved pages\n",reserved); + printk("%d pages shared\n",shared); + printk("%d pages swap cached\n",cached); +} + +extern unsigned long memory_start; +extern unsigned long memory_end; + +/* + * 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 paging_init(void) +{ + /* + * Make sure start_mem is page aligned, otherwise bootmem and + * page_alloc get different views og the world. + */ +#ifdef DEBUG + unsigned long start_mem = PAGE_ALIGN(memory_start); +#endif + unsigned long end_mem = memory_end & PAGE_MASK; + +#ifdef DEBUG + printk ("start_mem is %#lx\nvirtual_end is %#lx\n", + start_mem, end_mem); +#endif + + /* + * Initialize the bad page table and bad page to point + * to a couple of allocated pages. + */ + empty_bad_page_table = (unsigned long)alloc_bootmem_pages(PAGE_SIZE); + empty_bad_page = (unsigned long)alloc_bootmem_pages(PAGE_SIZE); + empty_zero_page = (unsigned long)alloc_bootmem_pages(PAGE_SIZE); + memset((void *)empty_zero_page, 0, PAGE_SIZE); + + /* + * Set up SFC/DFC registers (user data space). + */ + set_fs (USER_DS); + +#ifdef DEBUG + printk ("before free_area_init\n"); + + printk ("free_area_init -> start_mem is %#lx\nvirtual_end is %#lx\n", + start_mem, end_mem); +#endif + + { + unsigned long zones_size[MAX_NR_ZONES] = {0, 0, 0}; + + zones_size[ZONE_DMA] = 0 >> PAGE_SHIFT; + zones_size[ZONE_NORMAL] = (end_mem - PAGE_OFFSET) >> PAGE_SHIFT; +#ifdef CONFIG_HIGHMEM + zones_size[ZONE_HIGHMEM] = 0; +#endif + free_area_init(zones_size); + } +} + +void mem_init(void) +{ + int codek = 0, datak = 0, initk = 0; + /* DAVIDM look at setup memory map generically with reserved area */ + unsigned long tmp; + extern char _etext, _stext, _sdata, _ebss, __init_begin, __init_end; + extern unsigned long _ramend, _ramstart; + unsigned long len = &_ramend - &_ramstart; + 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 */ + +#ifdef DEBUG + printk(KERN_DEBUG "Mem_init: start=%lx, end=%lx\n", start_mem, end_mem); +#endif + + end_mem &= PAGE_MASK; + high_memory = (void *) end_mem; + + start_mem = PAGE_ALIGN(start_mem); + max_mapnr = num_physpages = MAP_NR(high_memory); + + /* this will put all memory onto the freelists */ + totalram_pages = free_all_bootmem(); + + codek = (&_etext - &_stext) >> 10; + datak = (&_ebss - &_sdata) >> 10; + initk = (&__init_begin - &__init_end) >> 10; + + tmp = nr_free_pages() << PAGE_SHIFT; + printk(KERN_INFO "Memory available: %luk/%luk RAM, %luk/%luk ROM (%dk kernel code, %dk data)\n", + tmp >> 10, + len >> 10, + (rom_length > 0) ? ((rom_length >> 10) - codek) : 0, + rom_length >> 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)); + set_page_count(virt_to_page(start), 1); + free_page(start); + totalram_pages++; + pages++; + } + printk ("Freeing initrd memory: %dk freed\n", pages); +} +#endif + +void +free_initmem() +{ +#ifdef CONFIG_RAMKERNEL + unsigned long addr; + extern char __init_begin, __init_end; +/* + * 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)); + set_page_count(virt_to_page(addr), 1); + free_page(addr); + totalram_pages++; + } + printk(KERN_INFO "Freeing unused kernel memory: %ldk freed (0x%x - 0x%x)\n", + (addr - PAGE_ALIGN((long) &__init_begin)) >> 10, + (int)(PAGE_ALIGN((unsigned long)(&__init_begin))), + (int)(addr - PAGE_SIZE)); +#endif +} + diff --git a/arch/h8300/mm/kmap.c b/arch/h8300/mm/kmap.c new file mode 100644 index 0000000..4101ab5 --- /dev/null +++ b/arch/h8300/mm/kmap.c @@ -0,0 +1,59 @@ +/* + * linux/arch/h8300/mm/kmap.c + * + * Based on + * linux/arch/m68knommu/mm/kmap.c + * + * Copyright (C) 2000 Lineo, <davidm@snapgear.com> + * Copyright (C) 2000-2002 David McCullough <davidm@snapgear.com> + */ + +#include <linux/config.h> +#include <linux/mm.h> +#include <linux/kernel.h> +#include <linux/string.h> +#include <linux/types.h> +#include <linux/slab.h> +#include <linux/vmalloc.h> + +#include <asm/setup.h> +#include <asm/segment.h> +#include <asm/page.h> +#include <asm/pgalloc.h> +#include <asm/io.h> +#include <asm/system.h> + +#undef DEBUG + +/* + * Map some physical address range into the kernel address space. + */ +void *__ioremap(unsigned long physaddr, unsigned long size, int cacheflag) +{ + return (void *)physaddr; +} + +/* + * Unmap a ioremap()ed region again. + */ +void iounmap(void *addr) +{ +} + +/* + * __iounmap unmaps nearly everything, so be careful + * it doesn't free currently pointer/page tables anymore but it + * wans't used anyway and might be added later. + */ +void __iounmap(void *addr, unsigned long size) +{ +} + +/* + * Set new cache mode for some kernel address space. + * The caller must push data for that range itself, if such data may already + * be in the cache. + */ +void kernel_set_cachemode(void *addr, unsigned long size, int cmode) +{ +} diff --git a/arch/h8300/mm/memory.c b/arch/h8300/mm/memory.c new file mode 100644 index 0000000..f4ddece --- /dev/null +++ b/arch/h8300/mm/memory.c @@ -0,0 +1,70 @@ +/* + * linux/arch/h8300/mm/memory.c + * + * Copyright (C) 2002 Yoshinori Sato <ysato@users.sourceforge.jp>, + * + * Based on: + * + * linux/arch/m68knommu/mm/memory.c + * + * Copyright (C) 1998 Kenneth Albanowski <kjahds@kjahds.com>, + * Copyright (C) 1999-2002, Greg Ungerer (gerg@snapgear.com) + * + * Based on: + * + * linux/arch/m68k/mm/memory.c + * + * Copyright (C) 1995 Hamish Macdonald + */ + +#include <linux/config.h> +#include <linux/mm.h> +#include <linux/kernel.h> +#include <linux/string.h> +#include <linux/types.h> +#include <linux/slab.h> + +#include <asm/setup.h> +#include <asm/segment.h> +#include <asm/page.h> +#include <asm/pgtable.h> +#include <asm/system.h> +#include <asm/traps.h> +#include <asm/io.h> + +void cache_clear (unsigned long paddr, int len) +{ +} + + +void cache_push (unsigned long paddr, int len) +{ +} + +void cache_push_v (unsigned long vaddr, int len) +{ +} + +/* Map some physical address range into the kernel address space. The + * code is copied and adapted from map_chunk(). + */ + +unsigned long kernel_map(unsigned long paddr, unsigned long size, + int nocacheflag, unsigned long *memavailp ) +{ + return paddr; +} + +#ifdef MAGIC_ROM_PTR + +int is_in_rom(unsigned long addr) +{ + /* Anything not in operational RAM is returned as in rom! */ + if (addr < _ramstart || addr >= _ramend) + return 1; + else + return 0; +} + +#endif + |