diff options
Diffstat (limited to 'arch/avr32/mm')
| -rw-r--r-- | arch/avr32/mm/Makefile | 6 | ||||
| -rw-r--r-- | arch/avr32/mm/cache.c | 163 | ||||
| -rw-r--r-- | arch/avr32/mm/clear_page.S | 25 | ||||
| -rw-r--r-- | arch/avr32/mm/copy_page.S | 28 | ||||
| -rw-r--r-- | arch/avr32/mm/dma-coherent.c | 202 | ||||
| -rw-r--r-- | arch/avr32/mm/fault.c | 268 | ||||
| -rw-r--r-- | arch/avr32/mm/init.c | 125 | ||||
| -rw-r--r-- | arch/avr32/mm/ioremap.c | 93 | ||||
| -rw-r--r-- | arch/avr32/mm/tlb.c | 375 |
9 files changed, 0 insertions, 1285 deletions
diff --git a/arch/avr32/mm/Makefile b/arch/avr32/mm/Makefile deleted file mode 100644 index 0066491f90d4..000000000000 --- a/arch/avr32/mm/Makefile +++ /dev/null @@ -1,6 +0,0 @@ -# -# Makefile for the Linux/AVR32 kernel. -# - -obj-y += init.o clear_page.o copy_page.o dma-coherent.o -obj-y += ioremap.o cache.o fault.o tlb.o diff --git a/arch/avr32/mm/cache.c b/arch/avr32/mm/cache.c deleted file mode 100644 index d9476825fc43..000000000000 --- a/arch/avr32/mm/cache.c +++ /dev/null @@ -1,163 +0,0 @@ -/* - * Copyright (C) 2004-2006 Atmel Corporation - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include <linux/highmem.h> -#include <linux/unistd.h> - -#include <asm/cacheflush.h> -#include <asm/cachectl.h> -#include <asm/processor.h> -#include <linux/uaccess.h> -#include <asm/syscalls.h> - -/* - * If you attempt to flush anything more than this, you need superuser - * privileges. The value is completely arbitrary. - */ -#define CACHEFLUSH_MAX_LEN 1024 - -void invalidate_dcache_region(void *start, size_t size) -{ - unsigned long v, begin, end, linesz, mask; - - linesz = boot_cpu_data.dcache.linesz; - mask = linesz - 1; - - /* when first and/or last cachelines are shared, flush them - * instead of invalidating ... never discard valid data! - */ - begin = (unsigned long)start; - end = begin + size; - - if (begin & mask) { - flush_dcache_line(start); - begin += linesz; - } - if (end & mask) { - flush_dcache_line((void *)end); - end &= ~mask; - } - - /* remaining cachelines only need invalidation */ - for (v = begin; v < end; v += linesz) - invalidate_dcache_line((void *)v); - flush_write_buffer(); -} - -void clean_dcache_region(void *start, size_t size) -{ - unsigned long v, begin, end, linesz; - - linesz = boot_cpu_data.dcache.linesz; - begin = (unsigned long)start & ~(linesz - 1); - end = ((unsigned long)start + size + linesz - 1) & ~(linesz - 1); - - for (v = begin; v < end; v += linesz) - clean_dcache_line((void *)v); - flush_write_buffer(); -} - -void flush_dcache_region(void *start, size_t size) -{ - unsigned long v, begin, end, linesz; - - linesz = boot_cpu_data.dcache.linesz; - begin = (unsigned long)start & ~(linesz - 1); - end = ((unsigned long)start + size + linesz - 1) & ~(linesz - 1); - - for (v = begin; v < end; v += linesz) - flush_dcache_line((void *)v); - flush_write_buffer(); -} - -void invalidate_icache_region(void *start, size_t size) -{ - unsigned long v, begin, end, linesz; - - linesz = boot_cpu_data.icache.linesz; - begin = (unsigned long)start & ~(linesz - 1); - end = ((unsigned long)start + size + linesz - 1) & ~(linesz - 1); - - for (v = begin; v < end; v += linesz) - invalidate_icache_line((void *)v); -} - -static inline void __flush_icache_range(unsigned long start, unsigned long end) -{ - unsigned long v, linesz; - - linesz = boot_cpu_data.dcache.linesz; - for (v = start; v < end; v += linesz) { - clean_dcache_line((void *)v); - invalidate_icache_line((void *)v); - } - - flush_write_buffer(); -} - -/* - * This one is called after a module has been loaded. - */ -void flush_icache_range(unsigned long start, unsigned long end) -{ - unsigned long linesz; - - linesz = boot_cpu_data.dcache.linesz; - __flush_icache_range(start & ~(linesz - 1), - (end + linesz - 1) & ~(linesz - 1)); -} -EXPORT_SYMBOL(flush_icache_range); - -/* - * This one is called from __do_fault() and do_swap_page(). - */ -void flush_icache_page(struct vm_area_struct *vma, struct page *page) -{ - if (vma->vm_flags & VM_EXEC) { - void *v = page_address(page); - __flush_icache_range((unsigned long)v, (unsigned long)v + PAGE_SIZE); - } -} - -asmlinkage int sys_cacheflush(int operation, void __user *addr, size_t len) -{ - int ret; - - if (len > CACHEFLUSH_MAX_LEN) { - ret = -EPERM; - if (!capable(CAP_SYS_ADMIN)) - goto out; - } - - ret = -EFAULT; - if (!access_ok(VERIFY_WRITE, addr, len)) - goto out; - - switch (operation) { - case CACHE_IFLUSH: - flush_icache_range((unsigned long)addr, - (unsigned long)addr + len); - ret = 0; - break; - default: - ret = -EINVAL; - } - -out: - return ret; -} - -void copy_to_user_page(struct vm_area_struct *vma, struct page *page, - unsigned long vaddr, void *dst, const void *src, - unsigned long len) -{ - memcpy(dst, src, len); - if (vma->vm_flags & VM_EXEC) - flush_icache_range((unsigned long)dst, - (unsigned long)dst + len); -} diff --git a/arch/avr32/mm/clear_page.S b/arch/avr32/mm/clear_page.S deleted file mode 100644 index 5d70dca00699..000000000000 --- a/arch/avr32/mm/clear_page.S +++ /dev/null @@ -1,25 +0,0 @@ -/* - * Copyright (C) 2004-2006 Atmel Corporation - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include <linux/linkage.h> -#include <asm/page.h> - -/* - * clear_page - * r12: P1 address (to) - */ - .text - .global clear_page -clear_page: - sub r9, r12, -PAGE_SIZE - mov r10, 0 - mov r11, 0 -0: st.d r12++, r10 - cp r12, r9 - brne 0b - mov pc, lr diff --git a/arch/avr32/mm/copy_page.S b/arch/avr32/mm/copy_page.S deleted file mode 100644 index c2b3752946b8..000000000000 --- a/arch/avr32/mm/copy_page.S +++ /dev/null @@ -1,28 +0,0 @@ -/* - * Copyright (C) 2004-2006 Atmel Corporation - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ -#include <linux/linkage.h> -#include <asm/page.h> - -/* - * copy_page - * - * r12 to (P1 address) - * r11 from (P1 address) - * r8-r10 scratch - */ - .text - .global copy_page -copy_page: - sub r10, r11, -(1 << PAGE_SHIFT) - /* pref r11[0] */ -1: /* pref r11[8] */ - ld.d r8, r11++ - st.d r12++, r8 - cp r11, r10 - brlo 1b - mov pc, lr diff --git a/arch/avr32/mm/dma-coherent.c b/arch/avr32/mm/dma-coherent.c deleted file mode 100644 index 555222d4f414..000000000000 --- a/arch/avr32/mm/dma-coherent.c +++ /dev/null @@ -1,202 +0,0 @@ -/* - * Copyright (C) 2004-2006 Atmel Corporation - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include <linux/dma-mapping.h> -#include <linux/gfp.h> -#include <linux/export.h> -#include <linux/mm.h> -#include <linux/device.h> -#include <linux/scatterlist.h> - -#include <asm/processor.h> -#include <asm/cacheflush.h> -#include <asm/io.h> -#include <asm/addrspace.h> - -void dma_cache_sync(struct device *dev, void *vaddr, size_t size, int direction) -{ - /* - * No need to sync an uncached area - */ - if (PXSEG(vaddr) == P2SEG) - return; - - switch (direction) { - case DMA_FROM_DEVICE: /* invalidate only */ - invalidate_dcache_region(vaddr, size); - break; - case DMA_TO_DEVICE: /* writeback only */ - clean_dcache_region(vaddr, size); - break; - case DMA_BIDIRECTIONAL: /* writeback and invalidate */ - flush_dcache_region(vaddr, size); - break; - default: - BUG(); - } -} -EXPORT_SYMBOL(dma_cache_sync); - -static struct page *__dma_alloc(struct device *dev, size_t size, - dma_addr_t *handle, gfp_t gfp) -{ - struct page *page, *free, *end; - int order; - - /* Following is a work-around (a.k.a. hack) to prevent pages - * with __GFP_COMP being passed to split_page() which cannot - * handle them. The real problem is that this flag probably - * should be 0 on AVR32 as it is not supported on this - * platform--see CONFIG_HUGETLB_PAGE. */ - gfp &= ~(__GFP_COMP); - - size = PAGE_ALIGN(size); - order = get_order(size); - - page = alloc_pages(gfp, order); - if (!page) - return NULL; - split_page(page, order); - - /* - * When accessing physical memory with valid cache data, we - * get a cache hit even if the virtual memory region is marked - * as uncached. - * - * Since the memory is newly allocated, there is no point in - * doing a writeback. If the previous owner cares, he should - * have flushed the cache before releasing the memory. - */ - invalidate_dcache_region(phys_to_virt(page_to_phys(page)), size); - - *handle = page_to_bus(page); - free = page + (size >> PAGE_SHIFT); - end = page + (1 << order); - - /* - * Free any unused pages - */ - while (free < end) { - __free_page(free); - free++; - } - - return page; -} - -static void __dma_free(struct device *dev, size_t size, - struct page *page, dma_addr_t handle) -{ - struct page *end = page + (PAGE_ALIGN(size) >> PAGE_SHIFT); - - while (page < end) - __free_page(page++); -} - -static void *avr32_dma_alloc(struct device *dev, size_t size, - dma_addr_t *handle, gfp_t gfp, unsigned long attrs) -{ - struct page *page; - dma_addr_t phys; - - page = __dma_alloc(dev, size, handle, gfp); - if (!page) - return NULL; - phys = page_to_phys(page); - - if (attrs & DMA_ATTR_WRITE_COMBINE) { - /* Now, map the page into P3 with write-combining turned on */ - *handle = phys; - return __ioremap(phys, size, _PAGE_BUFFER); - } else { - return phys_to_uncached(phys); - } -} - -static void avr32_dma_free(struct device *dev, size_t size, - void *cpu_addr, dma_addr_t handle, unsigned long attrs) -{ - struct page *page; - - if (attrs & DMA_ATTR_WRITE_COMBINE) { - iounmap(cpu_addr); - - page = phys_to_page(handle); - } else { - void *addr = phys_to_cached(uncached_to_phys(cpu_addr)); - - pr_debug("avr32_dma_free addr %p (phys %08lx) size %u\n", - cpu_addr, (unsigned long)handle, (unsigned)size); - - BUG_ON(!virt_addr_valid(addr)); - page = virt_to_page(addr); - } - - __dma_free(dev, size, page, handle); -} - -static dma_addr_t avr32_dma_map_page(struct device *dev, struct page *page, - unsigned long offset, size_t size, - enum dma_data_direction direction, unsigned long attrs) -{ - void *cpu_addr = page_address(page) + offset; - - if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC)) - dma_cache_sync(dev, cpu_addr, size, direction); - return virt_to_bus(cpu_addr); -} - -static int avr32_dma_map_sg(struct device *dev, struct scatterlist *sglist, - int nents, enum dma_data_direction direction, - unsigned long attrs) -{ - int i; - struct scatterlist *sg; - - for_each_sg(sglist, sg, nents, i) { - char *virt; - - sg->dma_address = page_to_bus(sg_page(sg)) + sg->offset; - virt = sg_virt(sg); - - if (attrs & DMA_ATTR_SKIP_CPU_SYNC) - continue; - - dma_cache_sync(dev, virt, sg->length, direction); - } - - return nents; -} - -static void avr32_dma_sync_single_for_device(struct device *dev, - dma_addr_t dma_handle, size_t size, - enum dma_data_direction direction) -{ - dma_cache_sync(dev, bus_to_virt(dma_handle), size, direction); -} - -static void avr32_dma_sync_sg_for_device(struct device *dev, - struct scatterlist *sglist, int nents, - enum dma_data_direction direction) -{ - int i; - struct scatterlist *sg; - - for_each_sg(sglist, sg, nents, i) - dma_cache_sync(dev, sg_virt(sg), sg->length, direction); -} - -const struct dma_map_ops avr32_dma_ops = { - .alloc = avr32_dma_alloc, - .free = avr32_dma_free, - .map_page = avr32_dma_map_page, - .map_sg = avr32_dma_map_sg, - .sync_single_for_device = avr32_dma_sync_single_for_device, - .sync_sg_for_device = avr32_dma_sync_sg_for_device, -}; -EXPORT_SYMBOL(avr32_dma_ops); diff --git a/arch/avr32/mm/fault.c b/arch/avr32/mm/fault.c deleted file mode 100644 index b3977e9208a3..000000000000 --- a/arch/avr32/mm/fault.c +++ /dev/null @@ -1,268 +0,0 @@ -/* - * Copyright (C) 2004-2006 Atmel Corporation - * - * Based on linux/arch/sh/mm/fault.c: - * Copyright (C) 1999 Niibe Yutaka - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include <linux/mm.h> -#include <linux/extable.h> -#include <linux/pagemap.h> -#include <linux/kdebug.h> -#include <linux/kprobes.h> -#include <linux/uaccess.h> - -#include <asm/mmu_context.h> -#include <asm/sysreg.h> -#include <asm/tlb.h> - -#ifdef CONFIG_KPROBES -static inline int notify_page_fault(struct pt_regs *regs, int trap) -{ - int ret = 0; - - if (!user_mode(regs)) { - if (kprobe_running() && kprobe_fault_handler(regs, trap)) - ret = 1; - } - - return ret; -} -#else -static inline int notify_page_fault(struct pt_regs *regs, int trap) -{ - return 0; -} -#endif - -int exception_trace = 1; - -/* - * This routine handles page faults. It determines the address and the - * problem, and then passes it off to one of the appropriate routines. - * - * ecr is the Exception Cause Register. Possible values are: - * 6: Protection fault (instruction access) - * 15: Protection fault (read access) - * 16: Protection fault (write access) - * 20: Page not found (instruction access) - * 24: Page not found (read access) - * 28: Page not found (write access) - */ -asmlinkage void do_page_fault(unsigned long ecr, struct pt_regs *regs) -{ - struct task_struct *tsk; - struct mm_struct *mm; - struct vm_area_struct *vma; - const struct exception_table_entry *fixup; - unsigned long address; - unsigned long page; - long signr; - int code; - int fault; - unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE; - - if (notify_page_fault(regs, ecr)) - return; - - address = sysreg_read(TLBEAR); - - tsk = current; - mm = tsk->mm; - - signr = SIGSEGV; - code = SEGV_MAPERR; - - /* - * If we're in an interrupt or have no user context, we must - * not take the fault... - */ - if (faulthandler_disabled() || !mm || regs->sr & SYSREG_BIT(GM)) - goto no_context; - - local_irq_enable(); - - if (user_mode(regs)) - flags |= FAULT_FLAG_USER; -retry: - down_read(&mm->mmap_sem); - - vma = find_vma(mm, address); - if (!vma) - goto bad_area; - if (vma->vm_start <= address) - goto good_area; - if (!(vma->vm_flags & VM_GROWSDOWN)) - goto bad_area; - if (expand_stack(vma, address)) - goto bad_area; - - /* - * Ok, we have a good vm_area for this memory access, so we - * can handle it... - */ -good_area: - code = SEGV_ACCERR; - - switch (ecr) { - case ECR_PROTECTION_X: - case ECR_TLB_MISS_X: - if (!(vma->vm_flags & VM_EXEC)) - goto bad_area; - break; - case ECR_PROTECTION_R: - case ECR_TLB_MISS_R: - if (!(vma->vm_flags & (VM_READ | VM_WRITE | VM_EXEC))) - goto bad_area; - break; - case ECR_PROTECTION_W: - case ECR_TLB_MISS_W: - if (!(vma->vm_flags & VM_WRITE)) - goto bad_area; - flags |= FAULT_FLAG_WRITE; - break; - default: - panic("Unhandled case %lu in do_page_fault!", ecr); - } - - /* - * If for any reason at all we couldn't handle the fault, make - * sure we exit gracefully rather than endlessly redo the - * fault. - */ - fault = handle_mm_fault(vma, address, flags); - - if ((fault & VM_FAULT_RETRY) && fatal_signal_pending(current)) - return; - - if (unlikely(fault & VM_FAULT_ERROR)) { - if (fault & VM_FAULT_OOM) - goto out_of_memory; - else if (fault & VM_FAULT_SIGSEGV) - goto bad_area; - else if (fault & VM_FAULT_SIGBUS) - goto do_sigbus; - BUG(); - } - - if (flags & FAULT_FLAG_ALLOW_RETRY) { - if (fault & VM_FAULT_MAJOR) - tsk->maj_flt++; - else - tsk->min_flt++; - if (fault & VM_FAULT_RETRY) { - flags &= ~FAULT_FLAG_ALLOW_RETRY; - flags |= FAULT_FLAG_TRIED; - - /* - * No need to up_read(&mm->mmap_sem) as we would have - * already released it in __lock_page_or_retry() in - * mm/filemap.c. - */ - goto retry; - } - } - - up_read(&mm->mmap_sem); - return; - - /* - * Something tried to access memory that isn't in our memory - * map. Fix it, but check if it's kernel or user first... - */ -bad_area: - up_read(&mm->mmap_sem); - - if (user_mode(regs)) { - if (exception_trace && printk_ratelimit()) - printk("%s%s[%d]: segfault at %08lx pc %08lx " - "sp %08lx ecr %lu\n", - is_global_init(tsk) ? KERN_EMERG : KERN_INFO, - tsk->comm, tsk->pid, address, regs->pc, - regs->sp, ecr); - _exception(SIGSEGV, regs, code, address); - return; - } - -no_context: - /* Are we prepared to handle this kernel fault? */ - fixup = search_exception_tables(regs->pc); - if (fixup) { - regs->pc = fixup->fixup; - return; - } - - /* - * Oops. The kernel tried to access some bad page. We'll have - * to terminate things with extreme prejudice. - */ - if (address < PAGE_SIZE) - printk(KERN_ALERT - "Unable to handle kernel NULL pointer dereference"); - else - printk(KERN_ALERT - "Unable to handle kernel paging request"); - printk(" at virtual address %08lx\n", address); - - page = sysreg_read(PTBR); - printk(KERN_ALERT "ptbr = %08lx", page); - if (address >= TASK_SIZE) - page = (unsigned long)swapper_pg_dir; - if (page) { - page = ((unsigned long *)page)[address >> 22]; - printk(" pgd = %08lx", page); - if (page & _PAGE_PRESENT) { - page &= PAGE_MASK; - address &= 0x003ff000; - page = ((unsigned long *)__va(page))[address >> PAGE_SHIFT]; - printk(" pte = %08lx", page); - } - } - printk("\n"); - die("Kernel access of bad area", regs, signr); - return; - - /* - * We ran out of memory, or some other thing happened to us - * that made us unable to handle the page fault gracefully. - */ -out_of_memory: - up_read(&mm->mmap_sem); - if (!user_mode(regs)) - goto no_context; - pagefault_out_of_memory(); - return; - -do_sigbus: - up_read(&mm->mmap_sem); - - /* Kernel mode? Handle exceptions or die */ - signr = SIGBUS; - code = BUS_ADRERR; - if (!user_mode(regs)) - goto no_context; - - if (exception_trace) - printk("%s%s[%d]: bus error at %08lx pc %08lx " - "sp %08lx ecr %lu\n", - is_global_init(tsk) ? KERN_EMERG : KERN_INFO, - tsk->comm, tsk->pid, address, regs->pc, - regs->sp, ecr); - - _exception(SIGBUS, regs, BUS_ADRERR, address); -} - -asmlinkage void do_bus_error(unsigned long addr, int write_access, - struct pt_regs *regs) -{ - printk(KERN_ALERT - "Bus error at physical address 0x%08lx (%s access)\n", - addr, write_access ? "write" : "read"); - printk(KERN_INFO "DTLB dump:\n"); - dump_dtlb(); - die("Bus Error", regs, SIGKILL); -} diff --git a/arch/avr32/mm/init.c b/arch/avr32/mm/init.c deleted file mode 100644 index def5391d927a..000000000000 --- a/arch/avr32/mm/init.c +++ /dev/null @@ -1,125 +0,0 @@ -/* - * Copyright (C) 2004-2006 Atmel Corporation - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include <linux/kernel.h> -#include <linux/gfp.h> -#include <linux/mm.h> -#include <linux/swap.h> -#include <linux/init.h> -#include <linux/mmzone.h> -#include <linux/module.h> -#include <linux/bootmem.h> -#include <linux/pagemap.h> -#include <linux/nodemask.h> - -#include <asm/page.h> -#include <asm/mmu_context.h> -#include <asm/tlb.h> -#include <asm/io.h> -#include <asm/dma.h> -#include <asm/setup.h> -#include <asm/sections.h> - -pgd_t swapper_pg_dir[PTRS_PER_PGD] __page_aligned_data; - -struct page *empty_zero_page; -EXPORT_SYMBOL(empty_zero_page); - -/* - * Cache of MMU context last used. - */ -unsigned long mmu_context_cache = NO_CONTEXT; - -/* - * paging_init() sets up the page tables - * - * This routine also unmaps the page at virtual kernel address 0, so - * that we can trap those pesky NULL-reference errors in the kernel. - */ -void __init paging_init(void) -{ - extern unsigned long _evba; - void *zero_page; - int nid; - - /* - * Make sure we can handle exceptions before enabling - * paging. Not that we should ever _get_ any exceptions this - * early, but you never know... - */ - printk("Exception vectors start at %p\n", &_evba); - sysreg_write(EVBA, (unsigned long)&_evba); - - /* - * Since we are ready to handle exceptions now, we should let - * the CPU generate them... - */ - __asm__ __volatile__ ("csrf %0" : : "i"(SR_EM_BIT)); - - /* - * Allocate the zero page. The allocator will panic if it - * can't satisfy the request, so no need to check. - */ - zero_page = alloc_bootmem_low_pages_node(NODE_DATA(0), - PAGE_SIZE); - - sysreg_write(PTBR, (unsigned long)swapper_pg_dir); - enable_mmu(); - printk ("CPU: Paging enabled\n"); - - for_each_online_node(nid) { - pg_data_t *pgdat = NODE_DATA(nid); - unsigned long zones_size[MAX_NR_ZONES]; - unsigned long low, start_pfn; - - start_pfn = pgdat->bdata->node_min_pfn; - low = pgdat->bdata->node_low_pfn; - - memset(zones_size, 0, sizeof(zones_size)); - zones_size[ZONE_NORMAL] = low - start_pfn; - - printk("Node %u: start_pfn = 0x%lx, low = 0x%lx\n", - nid, start_pfn, low); - - free_area_init_node(nid, zones_size, start_pfn, NULL); - - printk("Node %u: mem_map starts at %p\n", - pgdat->node_id, pgdat->node_mem_map); - } - - mem_map = NODE_DATA(0)->node_mem_map; - - empty_zero_page = virt_to_page(zero_page); - flush_dcache_page(empty_zero_page); -} - -void __init mem_init(void) -{ - pg_data_t *pgdat; - - high_memory = NULL; - for_each_online_pgdat(pgdat) - high_memory = max_t(void *, high_memory, - __va(pgdat_end_pfn(pgdat) << PAGE_SHIFT)); - - set_max_mapnr(MAP_NR(high_memory)); - free_all_bootmem(); - mem_init_print_info(NULL); -} - -void free_initmem(void) -{ - free_initmem_default(-1); -} - -#ifdef CONFIG_BLK_DEV_INITRD -void free_initrd_mem(unsigned long start, unsigned long end) -{ - free_reserved_area((void *)start, (void *)end, -1, "initrd"); -} -#endif diff --git a/arch/avr32/mm/ioremap.c b/arch/avr32/mm/ioremap.c deleted file mode 100644 index 7def0d84cec6..000000000000 --- a/arch/avr32/mm/ioremap.c +++ /dev/null @@ -1,93 +0,0 @@ -/* - * Copyright (C) 2004-2006 Atmel Corporation - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ -#include <linux/vmalloc.h> -#include <linux/mm.h> -#include <linux/module.h> -#include <linux/io.h> -#include <linux/slab.h> - -#include <asm/pgtable.h> -#include <asm/addrspace.h> - -/* - * Re-map an arbitrary physical address space into the kernel virtual - * address space. Needed when the kernel wants to access physical - * memory directly. - */ -void __iomem *__ioremap(unsigned long phys_addr, size_t size, - unsigned long flags) -{ - unsigned long addr; - struct vm_struct *area; - unsigned long offset, last_addr; - pgprot_t prot; - - /* - * Check if we can simply use the P4 segment. This area is - * uncacheable, so if caching/buffering is requested, we can't - * use it. - */ - if ((phys_addr >= P4SEG) && (flags == 0)) - return (void __iomem *)phys_addr; - - /* Don't allow wraparound or zero size */ - last_addr = phys_addr + size - 1; - if (!size || last_addr < phys_addr) - return NULL; - - /* - * XXX: When mapping regular RAM, we'd better make damn sure - * it's never used for anything else. But this is really the - * caller's responsibility... - */ - if (PHYSADDR(P2SEGADDR(phys_addr)) == phys_addr) - return (void __iomem *)P2SEGADDR(phys_addr); - - /* Mappings have to be page-aligned */ - offset = phys_addr & ~PAGE_MASK; - phys_addr &= PAGE_MASK; - size = PAGE_ALIGN(last_addr + 1) - phys_addr; - - prot = __pgprot(_PAGE_PRESENT | _PAGE_GLOBAL | _PAGE_RW | _PAGE_DIRTY - | _PAGE_ACCESSED | _PAGE_TYPE_SMALL | flags); - - /* - * Ok, go for it.. - */ - area = get_vm_area(size, VM_IOREMAP); - if (!area) - return NULL; - area->phys_addr = phys_addr; - addr = (unsigned long )area->addr; - if (ioremap_page_range(addr, addr + size, phys_addr, prot)) { - vunmap((void *)addr); - return NULL; - } - - return (void __iomem *)(offset + (char *)addr); -} -EXPORT_SYMBOL(__ioremap); - -void __iounmap(void __iomem *addr) -{ - struct vm_struct *p; - - if ((unsigned long)addr >= P4SEG) - return; - if (PXSEG(addr) == P2SEG) - return; - - p = remove_vm_area((void *)(PAGE_MASK & (unsigned long __force)addr)); - if (unlikely(!p)) { - printk (KERN_ERR "iounmap: bad address %p\n", addr); - return; - } - - kfree (p); -} -EXPORT_SYMBOL(__iounmap); diff --git a/arch/avr32/mm/tlb.c b/arch/avr32/mm/tlb.c deleted file mode 100644 index 0da23109f817..000000000000 --- a/arch/avr32/mm/tlb.c +++ /dev/null @@ -1,375 +0,0 @@ -/* - * AVR32 TLB operations - * - * Copyright (C) 2004-2006 Atmel Corporation - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ -#include <linux/mm.h> - -#include <asm/mmu_context.h> - -/* TODO: Get the correct number from the CONFIG1 system register */ -#define NR_TLB_ENTRIES 32 - -static void show_dtlb_entry(unsigned int index) -{ - u32 tlbehi, tlbehi_save, tlbelo, mmucr, mmucr_save; - unsigned long flags; - - local_irq_save(flags); - mmucr_save = sysreg_read(MMUCR); - tlbehi_save = sysreg_read(TLBEHI); - mmucr = SYSREG_BFINS(DRP, index, mmucr_save); - sysreg_write(MMUCR, mmucr); - - __builtin_tlbr(); - cpu_sync_pipeline(); - - tlbehi = sysreg_read(TLBEHI); - tlbelo = sysreg_read(TLBELO); - - printk("%2u: %c %c %02x %05x %05x %o %o %c %c %c %c\n", - index, - SYSREG_BFEXT(TLBEHI_V, tlbehi) ? '1' : '0', - SYSREG_BFEXT(G, tlbelo) ? '1' : '0', - SYSREG_BFEXT(ASID, tlbehi), - SYSREG_BFEXT(VPN, tlbehi) >> 2, - SYSREG_BFEXT(PFN, tlbelo) >> 2, - SYSREG_BFEXT(AP, tlbelo), - SYSREG_BFEXT(SZ, tlbelo), - SYSREG_BFEXT(TLBELO_C, tlbelo) ? 'C' : ' ', - SYSREG_BFEXT(B, tlbelo) ? 'B' : ' ', - SYSREG_BFEXT(W, tlbelo) ? 'W' : ' ', - SYSREG_BFEXT(TLBELO_D, tlbelo) ? 'D' : ' '); - - sysreg_write(MMUCR, mmucr_save); - sysreg_write(TLBEHI, tlbehi_save); - cpu_sync_pipeline(); - local_irq_restore(flags); -} - -void dump_dtlb(void) -{ - unsigned int i; - - printk("ID V G ASID VPN PFN AP SZ C B W D\n"); - for (i = 0; i < NR_TLB_ENTRIES; i++) - show_dtlb_entry(i); -} - -static void update_dtlb(unsigned long address, pte_t pte) -{ - u32 tlbehi; - u32 mmucr; - - /* - * We're not changing the ASID here, so no need to flush the - * pipeline. - */ - tlbehi = sysreg_read(TLBEHI); - tlbehi = SYSREG_BF(ASID, SYSREG_BFEXT(ASID, tlbehi)); - tlbehi |= address & MMU_VPN_MASK; - tlbehi |= SYSREG_BIT(TLBEHI_V); - sysreg_write(TLBEHI, tlbehi); - - /* Does this mapping already exist? */ - __builtin_tlbs(); - mmucr = sysreg_read(MMUCR); - - if (mmucr & SYSREG_BIT(MMUCR_N)) { - /* Not found -- pick a not-recently-accessed entry */ - unsigned int rp; - u32 tlbar = sysreg_read(TLBARLO); - - rp = 32 - fls(tlbar); - if (rp == 32) { - rp = 0; - sysreg_write(TLBARLO, -1L); - } - - mmucr = SYSREG_BFINS(DRP, rp, mmucr); - sysreg_write(MMUCR, mmucr); - } - - sysreg_write(TLBELO, pte_val(pte) & _PAGE_FLAGS_HARDWARE_MASK); - - /* Let's go */ - __builtin_tlbw(); -} - -void update_mmu_cache(struct vm_area_struct *vma, - unsigned long address, pte_t *ptep) -{ - unsigned long flags; - - /* ptrace may call this routine */ - if (vma && current->active_mm != vma->vm_mm) - return; - - local_irq_save(flags); - update_dtlb(address, *ptep); - local_irq_restore(flags); -} - -static void __flush_tlb_page(unsigned long asid, unsigned long page) -{ - u32 mmucr, tlbehi; - - /* - * Caller is responsible for masking out non-PFN bits in page - * and changing the current ASID if necessary. This means that - * we don't need to flush the pipeline after writing TLBEHI. - */ - tlbehi = page | asid; - sysreg_write(TLBEHI, tlbehi); - - __builtin_tlbs(); - mmucr = sysreg_read(MMUCR); - - if (!(mmucr & SYSREG_BIT(MMUCR_N))) { - unsigned int entry; - u32 tlbarlo; - - /* Clear the "valid" bit */ - sysreg_write(TLBEHI, tlbehi); - - /* mark the entry as "not accessed" */ - entry = SYSREG_BFEXT(DRP, mmucr); - tlbarlo = sysreg_read(TLBARLO); - tlbarlo |= (0x80000000UL >> entry); - sysreg_write(TLBARLO, tlbarlo); - - /* update the entry with valid bit clear */ - __builtin_tlbw(); - } -} - -void flush_tlb_page(struct vm_area_struct *vma, unsigned long page) -{ - if (vma->vm_mm && vma->vm_mm->context != NO_CONTEXT) { - unsigned long flags, asid; - unsigned long saved_asid = MMU_NO_ASID; - - asid = vma->vm_mm->context & MMU_CONTEXT_ASID_MASK; - page &= PAGE_MASK; - - local_irq_save(flags); - if (vma->vm_mm != current->mm) { - saved_asid = get_asid(); - set_asid(asid); - } - - __flush_tlb_page(asid, page); - - if (saved_asid != MMU_NO_ASID) - set_asid(saved_asid); - local_irq_restore(flags); - } -} - -void flush_tlb_range(struct vm_area_struct *vma, unsigned long start, - unsigned long end) -{ - struct mm_struct *mm = vma->vm_mm; - - if (mm->context != NO_CONTEXT) { - unsigned long flags; - int size; - - local_irq_save(flags); - size = (end - start + (PAGE_SIZE - 1)) >> PAGE_SHIFT; - - if (size > (MMU_DTLB_ENTRIES / 4)) { /* Too many entries to flush */ - mm->context = NO_CONTEXT; - if (mm == current->mm) - activate_context(mm); - } else { - unsigned long asid; - unsigned long saved_asid; - - asid = mm->context & MMU_CONTEXT_ASID_MASK; - saved_asid = MMU_NO_ASID; - - start &= PAGE_MASK; - end += (PAGE_SIZE - 1); - end &= PAGE_MASK; - - if (mm != current->mm) { - saved_asid = get_asid(); - set_asid(asid); - } - - while (start < end) { - __flush_tlb_page(asid, start); - start += PAGE_SIZE; - } - if (saved_asid != MMU_NO_ASID) - set_asid(saved_asid); - } - local_irq_restore(flags); - } -} - -/* - * This function depends on the pages to be flushed having the G - * (global) bit set in their pte. This is true for all - * PAGE_KERNEL(_RO) pages. - */ -void flush_tlb_kernel_range(unsigned long start, unsigned long end) -{ - unsigned long flags; - int size; - - size = (end - start + (PAGE_SIZE - 1)) >> PAGE_SHIFT; - if (size > (MMU_DTLB_ENTRIES / 4)) { /* Too many entries to flush */ - flush_tlb_all(); - } else { - unsigned long asid; - - local_irq_save(flags); - asid = get_asid(); - - start &= PAGE_MASK; - end += (PAGE_SIZE - 1); - end &= PAGE_MASK; - - while (start < end) { - __flush_tlb_page(asid, start); - start += PAGE_SIZE; - } - local_irq_restore(flags); - } -} - -void flush_tlb_mm(struct mm_struct *mm) -{ - /* Invalidate all TLB entries of this process by getting a new ASID */ - if (mm->context != NO_CONTEXT) { - unsigned long flags; - - local_irq_save(flags); - mm->context = NO_CONTEXT; - if (mm == current->mm) - activate_context(mm); - local_irq_restore(flags); - } -} - -void flush_tlb_all(void) -{ - unsigned long flags; - - local_irq_save(flags); - sysreg_write(MMUCR, sysreg_read(MMUCR) | SYSREG_BIT(MMUCR_I)); - local_irq_restore(flags); -} - -#ifdef CONFIG_PROC_FS - -#include <linux/seq_file.h> -#include <linux/proc_fs.h> -#include <linux/init.h> - -static void *tlb_start(struct seq_file *tlb, loff_t *pos) -{ - static unsigned long tlb_index; - - if (*pos >= NR_TLB_ENTRIES) - return NULL; - - tlb_index = 0; - return &tlb_index; -} - -static void *tlb_next(struct seq_file *tlb, void *v, loff_t *pos) -{ - unsigned long *index = v; - - if (*index >= NR_TLB_ENTRIES - 1) - return NULL; - - ++*pos; - ++*index; - return index; -} - -static void tlb_stop(struct seq_file *tlb, void *v) -{ - -} - -static int tlb_show(struct seq_file *tlb, void *v) -{ - unsigned int tlbehi, tlbehi_save, tlbelo, mmucr, mmucr_save; - unsigned long flags; - unsigned long *index = v; - - if (*index == 0) - seq_puts(tlb, "ID V G ASID VPN PFN AP SZ C B W D\n"); - - BUG_ON(*index >= NR_TLB_ENTRIES); - - local_irq_save(flags); - mmucr_save = sysreg_read(MMUCR); - tlbehi_save = sysreg_read(TLBEHI); - mmucr = SYSREG_BFINS(DRP, *index, mmucr_save); - sysreg_write(MMUCR, mmucr); - - /* TLBR might change the ASID */ - __builtin_tlbr(); - cpu_sync_pipeline(); - - tlbehi = sysreg_read(TLBEHI); - tlbelo = sysreg_read(TLBELO); - - sysreg_write(MMUCR, mmucr_save); - sysreg_write(TLBEHI, tlbehi_save); - cpu_sync_pipeline(); - local_irq_restore(flags); - - seq_printf(tlb, "%2lu: %c %c %02x %05x %05x %o %o %c %c %c %c\n", - *index, - SYSREG_BFEXT(TLBEHI_V, tlbehi) ? '1' : '0', - SYSREG_BFEXT(G, tlbelo) ? '1' : '0', - SYSREG_BFEXT(ASID, tlbehi), - SYSREG_BFEXT(VPN, tlbehi) >> 2, - SYSREG_BFEXT(PFN, tlbelo) >> 2, - SYSREG_BFEXT(AP, tlbelo), - SYSREG_BFEXT(SZ, tlbelo), - SYSREG_BFEXT(TLBELO_C, tlbelo) ? '1' : '0', - SYSREG_BFEXT(B, tlbelo) ? '1' : '0', - SYSREG_BFEXT(W, tlbelo) ? '1' : '0', - SYSREG_BFEXT(TLBELO_D, tlbelo) ? '1' : '0'); - - return 0; -} - -static const struct seq_operations tlb_ops = { - .start = tlb_start, - .next = tlb_next, - .stop = tlb_stop, - .show = tlb_show, -}; - -static int tlb_open(struct inode *inode, struct file *file) -{ - return seq_open(file, &tlb_ops); -} - -static const struct file_operations proc_tlb_operations = { - .open = tlb_open, - .read = seq_read, - .llseek = seq_lseek, - .release = seq_release, -}; - -static int __init proctlb_init(void) -{ - proc_create("tlb", 0, NULL, &proc_tlb_operations); - return 0; -} -late_initcall(proctlb_init); -#endif /* CONFIG_PROC_FS */ |