diff options
Diffstat (limited to 'arch/m68k/mm')
| -rw-r--r-- | arch/m68k/mm/Makefile | 13 | ||||
| -rw-r--r-- | arch/m68k/mm/Makefile_mm | 8 | ||||
| -rw-r--r-- | arch/m68k/mm/Makefile_no | 5 | ||||
| -rw-r--r-- | arch/m68k/mm/init.c | 153 | ||||
| -rw-r--r-- | arch/m68k/mm/init_mm.c | 150 | ||||
| -rw-r--r-- | arch/m68k/mm/init_no.c | 193 | ||||
| -rw-r--r-- | arch/m68k/mm/kmap.c | 368 | ||||
| -rw-r--r-- | arch/m68k/mm/kmap_mm.c | 367 | ||||
| -rw-r--r-- | arch/m68k/mm/kmap_no.c | 45 |
9 files changed, 780 insertions, 522 deletions
diff --git a/arch/m68k/mm/Makefile b/arch/m68k/mm/Makefile index 5eaa43c4cb3c..b60270e4954b 100644 --- a/arch/m68k/mm/Makefile +++ b/arch/m68k/mm/Makefile @@ -1,8 +1,5 @@ -# -# Makefile for the linux m68k-specific parts of the memory manager. -# - -obj-y := cache.o init.o fault.o hwtest.o - -obj-$(CONFIG_MMU_MOTOROLA) += kmap.o memory.o motorola.o -obj-$(CONFIG_MMU_SUN3) += sun3kmap.o sun3mmu.o +ifdef CONFIG_MMU +include arch/m68k/mm/Makefile_mm +else +include arch/m68k/mm/Makefile_no +endif diff --git a/arch/m68k/mm/Makefile_mm b/arch/m68k/mm/Makefile_mm new file mode 100644 index 000000000000..5eaa43c4cb3c --- /dev/null +++ b/arch/m68k/mm/Makefile_mm @@ -0,0 +1,8 @@ +# +# Makefile for the linux m68k-specific parts of the memory manager. +# + +obj-y := cache.o init.o fault.o hwtest.o + +obj-$(CONFIG_MMU_MOTOROLA) += kmap.o memory.o motorola.o +obj-$(CONFIG_MMU_SUN3) += sun3kmap.o sun3mmu.o diff --git a/arch/m68k/mm/Makefile_no b/arch/m68k/mm/Makefile_no new file mode 100644 index 000000000000..b54ab6b4b523 --- /dev/null +++ b/arch/m68k/mm/Makefile_no @@ -0,0 +1,5 @@ +# +# Makefile for the linux m68knommu specific parts of the memory manager. +# + +obj-y += init.o kmap.o diff --git a/arch/m68k/mm/init.c b/arch/m68k/mm/init.c index 8bc842554e5b..27b5ce089a34 100644 --- a/arch/m68k/mm/init.c +++ b/arch/m68k/mm/init.c @@ -1,150 +1,5 @@ -/* - * 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/system.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> - -DEFINE_PER_CPU(struct mmu_gather, mmu_gathers); - -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; - -void __init mem_init(void) -{ - pg_data_t *pgdat; - int codepages = 0; - int datapages = 0; - int initpages = 0; - int i; - -#ifdef CONFIG_ATARI - if (MACH_IS_ATARI) - atari_stram_mem_init_hook(); -#endif - - /* 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++; - } - } - -#ifndef CONFIG_SUN3 - /* 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)); -} - -#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); -} +#ifdef CONFIG_MMU +#include "init_mm.c" +#else +#include "init_no.c" #endif diff --git a/arch/m68k/mm/init_mm.c b/arch/m68k/mm/init_mm.c new file mode 100644 index 000000000000..8bc842554e5b --- /dev/null +++ b/arch/m68k/mm/init_mm.c @@ -0,0 +1,150 @@ +/* + * 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/system.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> + +DEFINE_PER_CPU(struct mmu_gather, mmu_gathers); + +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; + +void __init mem_init(void) +{ + pg_data_t *pgdat; + int codepages = 0; + int datapages = 0; + int initpages = 0; + int i; + +#ifdef CONFIG_ATARI + if (MACH_IS_ATARI) + atari_stram_mem_init_hook(); +#endif + + /* 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++; + } + } + +#ifndef CONFIG_SUN3 + /* 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)); +} + +#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 diff --git a/arch/m68k/mm/init_no.c b/arch/m68k/mm/init_no.c new file mode 100644 index 000000000000..8a6653f56bd8 --- /dev/null +++ b/arch/m68k/mm/init_no.c @@ -0,0 +1,193 @@ +/* + * 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/segment.h> +#include <asm/page.h> +#include <asm/pgtable.h> +#include <asm/system.h> +#include <asm/machdep.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 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 __init paging_init(void) +{ + /* + * Make sure start_mem is page aligned, otherwise bootmem and + * page_alloc get different views of the world. + */ +#ifdef DEBUG + unsigned long start_mem = PAGE_ALIGN(memory_start); +#endif + unsigned long end_mem = memory_end & PAGE_MASK; + +#ifdef DEBUG + printk (KERN_DEBUG "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 (KERN_DEBUG "before free_area_init\n"); + + printk (KERN_DEBUG "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, }; + + 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; + extern char _etext, _stext, _sdata, _ebss, __init_begin, __init_end; + extern unsigned int _ramend, _rambase; + 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 = (&_ebss - &_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++; + } + printk (KERN_NOTICE "Freeing initrd memory: %dk freed\n", pages * (PAGE_SIZE / 1024)); +} +#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)); + init_page_count(virt_to_page(addr)); + free_page(addr); + totalram_pages++; + } + printk(KERN_NOTICE "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/m68k/mm/kmap.c b/arch/m68k/mm/kmap.c index 69345849454b..a373d136b2b2 100644 --- a/arch/m68k/mm/kmap.c +++ b/arch/m68k/mm/kmap.c @@ -1,367 +1,5 @@ -/* - * linux/arch/m68k/mm/kmap.c - * - * Copyright (C) 1997 Roman Hodek - * - * 10/01/99 cleaned up the code and changing to the same interface - * used by other architectures /Roman Zippel - */ - -#include <linux/module.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 - -#define PTRTREESIZE (256*1024) - -/* - * For 040/060 we can use the virtual memory area like other architectures, - * but for 020/030 we want to use early termination page descriptor and we - * can't mix this with normal page descriptors, so we have to copy that code - * (mm/vmalloc.c) and return appriorate aligned addresses. - */ - -#ifdef CPU_M68040_OR_M68060_ONLY - -#define IO_SIZE PAGE_SIZE - -static inline struct vm_struct *get_io_area(unsigned long size) -{ - return get_vm_area(size, VM_IOREMAP); -} - - -static inline void free_io_area(void *addr) -{ - vfree((void *)(PAGE_MASK & (unsigned long)addr)); -} - +#ifdef CONFIG_MMU +#include "kmap_mm.c" #else - -#define IO_SIZE (256*1024) - -static struct vm_struct *iolist; - -static struct vm_struct *get_io_area(unsigned long size) -{ - unsigned long addr; - struct vm_struct **p, *tmp, *area; - - area = kmalloc(sizeof(*area), GFP_KERNEL); - if (!area) - return NULL; - addr = KMAP_START; - for (p = &iolist; (tmp = *p) ; p = &tmp->next) { - if (size + addr < (unsigned long)tmp->addr) - break; - if (addr > KMAP_END-size) { - kfree(area); - return NULL; - } - addr = tmp->size + (unsigned long)tmp->addr; - } - area->addr = (void *)addr; - area->size = size + IO_SIZE; - area->next = *p; - *p = area; - return area; -} - -static inline void free_io_area(void *addr) -{ - struct vm_struct **p, *tmp; - - if (!addr) - return; - addr = (void *)((unsigned long)addr & -IO_SIZE); - for (p = &iolist ; (tmp = *p) ; p = &tmp->next) { - if (tmp->addr == addr) { - *p = tmp->next; - __iounmap(tmp->addr, tmp->size); - kfree(tmp); - return; - } - } -} - +#include "kmap_no.c" #endif - -/* - * Map some physical address range into the kernel address space. - */ -/* Rewritten by Andreas Schwab to remove all races. */ - -void __iomem *__ioremap(unsigned long physaddr, unsigned long size, int cacheflag) -{ - struct vm_struct *area; - unsigned long virtaddr, retaddr; - long offset; - pgd_t *pgd_dir; - pmd_t *pmd_dir; - pte_t *pte_dir; - - /* - * Don't allow mappings that wrap.. - */ - if (!size || physaddr > (unsigned long)(-size)) - return NULL; - -#ifdef CONFIG_AMIGA - if (MACH_IS_AMIGA) { - if ((physaddr >= 0x40000000) && (physaddr + size < 0x60000000) - && (cacheflag == IOMAP_NOCACHE_SER)) - return (void __iomem *)physaddr; - } -#endif - -#ifdef DEBUG - printk("ioremap: 0x%lx,0x%lx(%d) - ", physaddr, size, cacheflag); -#endif - /* - * Mappings have to be aligned - */ - offset = physaddr & (IO_SIZE - 1); - physaddr &= -IO_SIZE; - size = (size + offset + IO_SIZE - 1) & -IO_SIZE; - - /* - * Ok, go for it.. - */ - area = get_io_area(size); - if (!area) - return NULL; - - virtaddr = (unsigned long)area->addr; - retaddr = virtaddr + offset; -#ifdef DEBUG - printk("0x%lx,0x%lx,0x%lx", physaddr, virtaddr, retaddr); -#endif - - /* - * add cache and table flags to physical address - */ - if (CPU_IS_040_OR_060) { - physaddr |= (_PAGE_PRESENT | _PAGE_GLOBAL040 | - _PAGE_ACCESSED | _PAGE_DIRTY); - switch (cacheflag) { - case IOMAP_FULL_CACHING: - physaddr |= _PAGE_CACHE040; - break; - case IOMAP_NOCACHE_SER: - default: - physaddr |= _PAGE_NOCACHE_S; - break; - case IOMAP_NOCACHE_NONSER: - physaddr |= _PAGE_NOCACHE; - break; - case IOMAP_WRITETHROUGH: - physaddr |= _PAGE_CACHE040W; - break; - } - } else { - physaddr |= (_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_DIRTY); - switch (cacheflag) { - case IOMAP_NOCACHE_SER: - case IOMAP_NOCACHE_NONSER: - default: - physaddr |= _PAGE_NOCACHE030; - break; - case IOMAP_FULL_CACHING: - case IOMAP_WRITETHROUGH: - break; - } - } - - while ((long)size > 0) { -#ifdef DEBUG - if (!(virtaddr & (PTRTREESIZE-1))) - printk ("\npa=%#lx va=%#lx ", physaddr, virtaddr); -#endif - pgd_dir = pgd_offset_k(virtaddr); - pmd_dir = pmd_alloc(&init_mm, pgd_dir, virtaddr); - if (!pmd_dir) { - printk("ioremap: no mem for pmd_dir\n"); - return NULL; - } - - if (CPU_IS_020_OR_030) { - pmd_dir->pmd[(virtaddr/PTRTREESIZE) & 15] = physaddr; - physaddr += PTRTREESIZE; - virtaddr += PTRTREESIZE; - size -= PTRTREESIZE; - } else { - pte_dir = pte_alloc_kernel(pmd_dir, virtaddr); - if (!pte_dir) { - printk("ioremap: no mem for pte_dir\n"); - return NULL; - } - - pte_val(*pte_dir) = physaddr; - virtaddr += PAGE_SIZE; - physaddr += PAGE_SIZE; - size -= PAGE_SIZE; - } - } -#ifdef DEBUG - printk("\n"); -#endif - flush_tlb_all(); - - return (void __iomem *)retaddr; -} -EXPORT_SYMBOL(__ioremap); - -/* - * Unmap a ioremap()ed region again - */ -void iounmap(void __iomem *addr) -{ -#ifdef CONFIG_AMIGA - if ((!MACH_IS_AMIGA) || - (((unsigned long)addr < 0x40000000) || - ((unsigned long)addr > 0x60000000))) - free_io_area((__force void *)addr); -#else - free_io_area((__force void *)addr); -#endif -} -EXPORT_SYMBOL(iounmap); - -/* - * __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) -{ - unsigned long virtaddr = (unsigned long)addr; - pgd_t *pgd_dir; - pmd_t *pmd_dir; - pte_t *pte_dir; - - while ((long)size > 0) { - pgd_dir = pgd_offset_k(virtaddr); - if (pgd_bad(*pgd_dir)) { - printk("iounmap: bad pgd(%08lx)\n", pgd_val(*pgd_dir)); - pgd_clear(pgd_dir); - return; - } - pmd_dir = pmd_offset(pgd_dir, virtaddr); - - if (CPU_IS_020_OR_030) { - int pmd_off = (virtaddr/PTRTREESIZE) & 15; - int pmd_type = pmd_dir->pmd[pmd_off] & _DESCTYPE_MASK; - - if (pmd_type == _PAGE_PRESENT) { - pmd_dir->pmd[pmd_off] = 0; - virtaddr += PTRTREESIZE; - size -= PTRTREESIZE; - continue; - } else if (pmd_type == 0) - continue; - } - - if (pmd_bad(*pmd_dir)) { - printk("iounmap: bad pmd (%08lx)\n", pmd_val(*pmd_dir)); - pmd_clear(pmd_dir); - return; - } - pte_dir = pte_offset_kernel(pmd_dir, virtaddr); - - pte_val(*pte_dir) = 0; - virtaddr += PAGE_SIZE; - size -= PAGE_SIZE; - } - - flush_tlb_all(); -} - -/* - * 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) -{ - unsigned long virtaddr = (unsigned long)addr; - pgd_t *pgd_dir; - pmd_t *pmd_dir; - pte_t *pte_dir; - - if (CPU_IS_040_OR_060) { - switch (cmode) { - case IOMAP_FULL_CACHING: - cmode = _PAGE_CACHE040; - break; - case IOMAP_NOCACHE_SER: - default: - cmode = _PAGE_NOCACHE_S; - break; - case IOMAP_NOCACHE_NONSER: - cmode = _PAGE_NOCACHE; - break; - case IOMAP_WRITETHROUGH: - cmode = _PAGE_CACHE040W; - break; - } - } else { - switch (cmode) { - case IOMAP_NOCACHE_SER: - case IOMAP_NOCACHE_NONSER: - default: - cmode = _PAGE_NOCACHE030; - break; - case IOMAP_FULL_CACHING: - case IOMAP_WRITETHROUGH: - cmode = 0; - } - } - - while ((long)size > 0) { - pgd_dir = pgd_offset_k(virtaddr); - if (pgd_bad(*pgd_dir)) { - printk("iocachemode: bad pgd(%08lx)\n", pgd_val(*pgd_dir)); - pgd_clear(pgd_dir); - return; - } - pmd_dir = pmd_offset(pgd_dir, virtaddr); - - if (CPU_IS_020_OR_030) { - int pmd_off = (virtaddr/PTRTREESIZE) & 15; - - if ((pmd_dir->pmd[pmd_off] & _DESCTYPE_MASK) == _PAGE_PRESENT) { - pmd_dir->pmd[pmd_off] = (pmd_dir->pmd[pmd_off] & - _CACHEMASK040) | cmode; - virtaddr += PTRTREESIZE; - size -= PTRTREESIZE; - continue; - } - } - - if (pmd_bad(*pmd_dir)) { - printk("iocachemode: bad pmd (%08lx)\n", pmd_val(*pmd_dir)); - pmd_clear(pmd_dir); - return; - } - pte_dir = pte_offset_kernel(pmd_dir, virtaddr); - - pte_val(*pte_dir) = (pte_val(*pte_dir) & _CACHEMASK040) | cmode; - virtaddr += PAGE_SIZE; - size -= PAGE_SIZE; - } - - flush_tlb_all(); -} -EXPORT_SYMBOL(kernel_set_cachemode); diff --git a/arch/m68k/mm/kmap_mm.c b/arch/m68k/mm/kmap_mm.c new file mode 100644 index 000000000000..69345849454b --- /dev/null +++ b/arch/m68k/mm/kmap_mm.c @@ -0,0 +1,367 @@ +/* + * linux/arch/m68k/mm/kmap.c + * + * Copyright (C) 1997 Roman Hodek + * + * 10/01/99 cleaned up the code and changing to the same interface + * used by other architectures /Roman Zippel + */ + +#include <linux/module.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 + +#define PTRTREESIZE (256*1024) + +/* + * For 040/060 we can use the virtual memory area like other architectures, + * but for 020/030 we want to use early termination page descriptor and we + * can't mix this with normal page descriptors, so we have to copy that code + * (mm/vmalloc.c) and return appriorate aligned addresses. + */ + +#ifdef CPU_M68040_OR_M68060_ONLY + +#define IO_SIZE PAGE_SIZE + +static inline struct vm_struct *get_io_area(unsigned long size) +{ + return get_vm_area(size, VM_IOREMAP); +} + + +static inline void free_io_area(void *addr) +{ + vfree((void *)(PAGE_MASK & (unsigned long)addr)); +} + +#else + +#define IO_SIZE (256*1024) + +static struct vm_struct *iolist; + +static struct vm_struct *get_io_area(unsigned long size) +{ + unsigned long addr; + struct vm_struct **p, *tmp, *area; + + area = kmalloc(sizeof(*area), GFP_KERNEL); + if (!area) + return NULL; + addr = KMAP_START; + for (p = &iolist; (tmp = *p) ; p = &tmp->next) { + if (size + addr < (unsigned long)tmp->addr) + break; + if (addr > KMAP_END-size) { + kfree(area); + return NULL; + } + addr = tmp->size + (unsigned long)tmp->addr; + } + area->addr = (void *)addr; + area->size = size + IO_SIZE; + area->next = *p; + *p = area; + return area; +} + +static inline void free_io_area(void *addr) +{ + struct vm_struct **p, *tmp; + + if (!addr) + return; + addr = (void *)((unsigned long)addr & -IO_SIZE); + for (p = &iolist ; (tmp = *p) ; p = &tmp->next) { + if (tmp->addr == addr) { + *p = tmp->next; + __iounmap(tmp->addr, tmp->size); + kfree(tmp); + return; + } + } +} + +#endif + +/* + * Map some physical address range into the kernel address space. + */ +/* Rewritten by Andreas Schwab to remove all races. */ + +void __iomem *__ioremap(unsigned long physaddr, unsigned long size, int cacheflag) +{ + struct vm_struct *area; + unsigned long virtaddr, retaddr; + long offset; + pgd_t *pgd_dir; + pmd_t *pmd_dir; + pte_t *pte_dir; + + /* + * Don't allow mappings that wrap.. + */ + if (!size || physaddr > (unsigned long)(-size)) + return NULL; + +#ifdef CONFIG_AMIGA + if (MACH_IS_AMIGA) { + if ((physaddr >= 0x40000000) && (physaddr + size < 0x60000000) + && (cacheflag == IOMAP_NOCACHE_SER)) + return (void __iomem *)physaddr; + } +#endif + +#ifdef DEBUG + printk("ioremap: 0x%lx,0x%lx(%d) - ", physaddr, size, cacheflag); +#endif + /* + * Mappings have to be aligned + */ + offset = physaddr & (IO_SIZE - 1); + physaddr &= -IO_SIZE; + size = (size + offset + IO_SIZE - 1) & -IO_SIZE; + + /* + * Ok, go for it.. + */ + area = get_io_area(size); + if (!area) + return NULL; + + virtaddr = (unsigned long)area->addr; + retaddr = virtaddr + offset; +#ifdef DEBUG + printk("0x%lx,0x%lx,0x%lx", physaddr, virtaddr, retaddr); +#endif + + /* + * add cache and table flags to physical address + */ + if (CPU_IS_040_OR_060) { + physaddr |= (_PAGE_PRESENT | _PAGE_GLOBAL040 | + _PAGE_ACCESSED | _PAGE_DIRTY); + switch (cacheflag) { + case IOMAP_FULL_CACHING: + physaddr |= _PAGE_CACHE040; + break; + case IOMAP_NOCACHE_SER: + default: + physaddr |= _PAGE_NOCACHE_S; + break; + case IOMAP_NOCACHE_NONSER: + physaddr |= _PAGE_NOCACHE; + break; + case IOMAP_WRITETHROUGH: + physaddr |= _PAGE_CACHE040W; + break; + } + } else { + physaddr |= (_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_DIRTY); + switch (cacheflag) { + case IOMAP_NOCACHE_SER: + case IOMAP_NOCACHE_NONSER: + default: + physaddr |= _PAGE_NOCACHE030; + break; + case IOMAP_FULL_CACHING: + case IOMAP_WRITETHROUGH: + break; + } + } + + while ((long)size > 0) { +#ifdef DEBUG + if (!(virtaddr & (PTRTREESIZE-1))) + printk ("\npa=%#lx va=%#lx ", physaddr, virtaddr); +#endif + pgd_dir = pgd_offset_k(virtaddr); + pmd_dir = pmd_alloc(&init_mm, pgd_dir, virtaddr); + if (!pmd_dir) { + printk("ioremap: no mem for pmd_dir\n"); + return NULL; + } + + if (CPU_IS_020_OR_030) { + pmd_dir->pmd[(virtaddr/PTRTREESIZE) & 15] = physaddr; + physaddr += PTRTREESIZE; + virtaddr += PTRTREESIZE; + size -= PTRTREESIZE; + } else { + pte_dir = pte_alloc_kernel(pmd_dir, virtaddr); + if (!pte_dir) { + printk("ioremap: no mem for pte_dir\n"); + return NULL; + } + + pte_val(*pte_dir) = physaddr; + virtaddr += PAGE_SIZE; + physaddr += PAGE_SIZE; + size -= PAGE_SIZE; + } + } +#ifdef DEBUG + printk("\n"); +#endif + flush_tlb_all(); + + return (void __iomem *)retaddr; +} +EXPORT_SYMBOL(__ioremap); + +/* + * Unmap a ioremap()ed region again + */ +void iounmap(void __iomem *addr) +{ +#ifdef CONFIG_AMIGA + if ((!MACH_IS_AMIGA) || + (((unsigned long)addr < 0x40000000) || + ((unsigned long)addr > 0x60000000))) + free_io_area((__force void *)addr); +#else + free_io_area((__force void *)addr); +#endif +} +EXPORT_SYMBOL(iounmap); + +/* + * __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) +{ + unsigned long virtaddr = (unsigned long)addr; + pgd_t *pgd_dir; + pmd_t *pmd_dir; + pte_t *pte_dir; + + while ((long)size > 0) { + pgd_dir = pgd_offset_k(virtaddr); + if (pgd_bad(*pgd_dir)) { + printk("iounmap: bad pgd(%08lx)\n", pgd_val(*pgd_dir)); + pgd_clear(pgd_dir); + return; + } + pmd_dir = pmd_offset(pgd_dir, virtaddr); + + if (CPU_IS_020_OR_030) { + int pmd_off = (virtaddr/PTRTREESIZE) & 15; + int pmd_type = pmd_dir->pmd[pmd_off] & _DESCTYPE_MASK; + + if (pmd_type == _PAGE_PRESENT) { + pmd_dir->pmd[pmd_off] = 0; + virtaddr += PTRTREESIZE; + size -= PTRTREESIZE; + continue; + } else if (pmd_type == 0) + continue; + } + + if (pmd_bad(*pmd_dir)) { + printk("iounmap: bad pmd (%08lx)\n", pmd_val(*pmd_dir)); + pmd_clear(pmd_dir); + return; + } + pte_dir = pte_offset_kernel(pmd_dir, virtaddr); + + pte_val(*pte_dir) = 0; + virtaddr += PAGE_SIZE; + size -= PAGE_SIZE; + } + + flush_tlb_all(); +} + +/* + * 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) +{ + unsigned long virtaddr = (unsigned long)addr; + pgd_t *pgd_dir; + pmd_t *pmd_dir; + pte_t *pte_dir; + + if (CPU_IS_040_OR_060) { + switch (cmode) { + case IOMAP_FULL_CACHING: + cmode = _PAGE_CACHE040; + break; + case IOMAP_NOCACHE_SER: + default: + cmode = _PAGE_NOCACHE_S; + break; + case IOMAP_NOCACHE_NONSER: + cmode = _PAGE_NOCACHE; + break; + case IOMAP_WRITETHROUGH: + cmode = _PAGE_CACHE040W; + break; + } + } else { + switch (cmode) { + case IOMAP_NOCACHE_SER: + case IOMAP_NOCACHE_NONSER: + default: + cmode = _PAGE_NOCACHE030; + break; + case IOMAP_FULL_CACHING: + case IOMAP_WRITETHROUGH: + cmode = 0; + } + } + + while ((long)size > 0) { + pgd_dir = pgd_offset_k(virtaddr); + if (pgd_bad(*pgd_dir)) { + printk("iocachemode: bad pgd(%08lx)\n", pgd_val(*pgd_dir)); + pgd_clear(pgd_dir); + return; + } + pmd_dir = pmd_offset(pgd_dir, virtaddr); + + if (CPU_IS_020_OR_030) { + int pmd_off = (virtaddr/PTRTREESIZE) & 15; + + if ((pmd_dir->pmd[pmd_off] & _DESCTYPE_MASK) == _PAGE_PRESENT) { + pmd_dir->pmd[pmd_off] = (pmd_dir->pmd[pmd_off] & + _CACHEMASK040) | cmode; + virtaddr += PTRTREESIZE; + size -= PTRTREESIZE; + continue; + } + } + + if (pmd_bad(*pmd_dir)) { + printk("iocachemode: bad pmd (%08lx)\n", pmd_val(*pmd_dir)); + pmd_clear(pmd_dir); + return; + } + pte_dir = pte_offset_kernel(pmd_dir, virtaddr); + + pte_val(*pte_dir) = (pte_val(*pte_dir) & _CACHEMASK040) | cmode; + virtaddr += PAGE_SIZE; + size -= PAGE_SIZE; + } + + flush_tlb_all(); +} +EXPORT_SYMBOL(kernel_set_cachemode); diff --git a/arch/m68k/mm/kmap_no.c b/arch/m68k/mm/kmap_no.c new file mode 100644 index 000000000000..ece8d5ad4e6c --- /dev/null +++ b/arch/m68k/mm/kmap_no.c @@ -0,0 +1,45 @@ +/* + * linux/arch/m68knommu/mm/kmap.c + * + * Copyright (C) 2000 Lineo, <davidm@snapgear.com> + * Copyright (C) 2000-2002 David McCullough <davidm@snapgear.com> + */ + +#include <linux/mm.h> +#include <linux/kernel.h> +#include <linux/string.h> +#include <linux/types.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) +{ +} + +/* + * 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) +{ +} |