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Diffstat (limited to 'arch/nds32/mm/cacheflush.c')
-rw-r--r--arch/nds32/mm/cacheflush.c338
1 files changed, 0 insertions, 338 deletions
diff --git a/arch/nds32/mm/cacheflush.c b/arch/nds32/mm/cacheflush.c
deleted file mode 100644
index 07aac65d1cab..000000000000
--- a/arch/nds32/mm/cacheflush.c
+++ /dev/null
@@ -1,338 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2017 Andes Technology Corporation
-
-#include <linux/mm.h>
-#include <linux/sched.h>
-#include <linux/fs.h>
-#include <linux/pagemap.h>
-#include <linux/module.h>
-#include <asm/cacheflush.h>
-#include <asm/proc-fns.h>
-#include <asm/shmparam.h>
-#include <asm/cache_info.h>
-
-extern struct cache_info L1_cache_info[2];
-
-void flush_icache_range(unsigned long start, unsigned long end)
-{
- unsigned long line_size, flags;
- line_size = L1_cache_info[DCACHE].line_size;
- start = start & ~(line_size - 1);
- end = (end + line_size - 1) & ~(line_size - 1);
- local_irq_save(flags);
- cpu_cache_wbinval_range(start, end, 1);
- local_irq_restore(flags);
-}
-EXPORT_SYMBOL(flush_icache_range);
-
-void flush_icache_page(struct vm_area_struct *vma, struct page *page)
-{
- unsigned long flags;
- unsigned long kaddr;
- local_irq_save(flags);
- kaddr = (unsigned long)kmap_atomic(page);
- cpu_cache_wbinval_page(kaddr, vma->vm_flags & VM_EXEC);
- kunmap_atomic((void *)kaddr);
- local_irq_restore(flags);
-}
-
-void flush_icache_user_page(struct vm_area_struct *vma, struct page *page,
- unsigned long addr, int len)
-{
- unsigned long kaddr;
- kaddr = (unsigned long)kmap_atomic(page) + (addr & ~PAGE_MASK);
- flush_icache_range(kaddr, kaddr + len);
- kunmap_atomic((void *)kaddr);
-}
-
-void update_mmu_cache(struct vm_area_struct *vma, unsigned long addr,
- pte_t * pte)
-{
- struct page *page;
- unsigned long pfn = pte_pfn(*pte);
- unsigned long flags;
-
- if (!pfn_valid(pfn))
- return;
-
- if (vma->vm_mm == current->active_mm) {
- local_irq_save(flags);
- __nds32__mtsr_dsb(addr, NDS32_SR_TLB_VPN);
- __nds32__tlbop_rwr(*pte);
- __nds32__isb();
- local_irq_restore(flags);
- }
- page = pfn_to_page(pfn);
-
- if ((test_and_clear_bit(PG_dcache_dirty, &page->flags)) ||
- (vma->vm_flags & VM_EXEC)) {
- unsigned long kaddr;
- local_irq_save(flags);
- kaddr = (unsigned long)kmap_atomic(page);
- cpu_cache_wbinval_page(kaddr, vma->vm_flags & VM_EXEC);
- kunmap_atomic((void *)kaddr);
- local_irq_restore(flags);
- }
-}
-#ifdef CONFIG_CPU_CACHE_ALIASING
-extern pte_t va_present(struct mm_struct *mm, unsigned long addr);
-
-static inline unsigned long aliasing(unsigned long addr, unsigned long page)
-{
- return ((addr & PAGE_MASK) ^ page) & (SHMLBA - 1);
-}
-
-static inline unsigned long kremap0(unsigned long uaddr, unsigned long pa)
-{
- unsigned long kaddr, pte;
-
-#define BASE_ADDR0 0xffffc000
- kaddr = BASE_ADDR0 | (uaddr & L1_cache_info[DCACHE].aliasing_mask);
- pte = (pa | PAGE_KERNEL);
- __nds32__mtsr_dsb(kaddr, NDS32_SR_TLB_VPN);
- __nds32__tlbop_rwlk(pte);
- __nds32__isb();
- return kaddr;
-}
-
-static inline void kunmap01(unsigned long kaddr)
-{
- __nds32__tlbop_unlk(kaddr);
- __nds32__tlbop_inv(kaddr);
- __nds32__isb();
-}
-
-static inline unsigned long kremap1(unsigned long uaddr, unsigned long pa)
-{
- unsigned long kaddr, pte;
-
-#define BASE_ADDR1 0xffff8000
- kaddr = BASE_ADDR1 | (uaddr & L1_cache_info[DCACHE].aliasing_mask);
- pte = (pa | PAGE_KERNEL);
- __nds32__mtsr_dsb(kaddr, NDS32_SR_TLB_VPN);
- __nds32__tlbop_rwlk(pte);
- __nds32__isb();
- return kaddr;
-}
-
-void flush_cache_mm(struct mm_struct *mm)
-{
- unsigned long flags;
-
- local_irq_save(flags);
- cpu_dcache_wbinval_all();
- cpu_icache_inval_all();
- local_irq_restore(flags);
-}
-
-void flush_cache_dup_mm(struct mm_struct *mm)
-{
-}
-
-void flush_cache_range(struct vm_area_struct *vma,
- unsigned long start, unsigned long end)
-{
- unsigned long flags;
-
- if ((end - start) > 8 * PAGE_SIZE) {
- cpu_dcache_wbinval_all();
- if (vma->vm_flags & VM_EXEC)
- cpu_icache_inval_all();
- return;
- }
- local_irq_save(flags);
- while (start < end) {
- if (va_present(vma->vm_mm, start))
- cpu_cache_wbinval_page(start, vma->vm_flags & VM_EXEC);
- start += PAGE_SIZE;
- }
- local_irq_restore(flags);
- return;
-}
-
-void flush_cache_page(struct vm_area_struct *vma,
- unsigned long addr, unsigned long pfn)
-{
- unsigned long vto, flags;
-
- local_irq_save(flags);
- vto = kremap0(addr, pfn << PAGE_SHIFT);
- cpu_cache_wbinval_page(vto, vma->vm_flags & VM_EXEC);
- kunmap01(vto);
- local_irq_restore(flags);
-}
-
-void flush_cache_vmap(unsigned long start, unsigned long end)
-{
- cpu_dcache_wbinval_all();
- cpu_icache_inval_all();
-}
-
-void flush_cache_vunmap(unsigned long start, unsigned long end)
-{
- cpu_dcache_wbinval_all();
- cpu_icache_inval_all();
-}
-
-void copy_user_page(void *vto, void *vfrom, unsigned long vaddr,
- struct page *to)
-{
- cpu_dcache_wbinval_page((unsigned long)vaddr);
- cpu_icache_inval_page((unsigned long)vaddr);
- copy_page(vto, vfrom);
- cpu_dcache_wbinval_page((unsigned long)vto);
- cpu_icache_inval_page((unsigned long)vto);
-}
-
-void clear_user_page(void *addr, unsigned long vaddr, struct page *page)
-{
- cpu_dcache_wbinval_page((unsigned long)vaddr);
- cpu_icache_inval_page((unsigned long)vaddr);
- clear_page(addr);
- cpu_dcache_wbinval_page((unsigned long)addr);
- cpu_icache_inval_page((unsigned long)addr);
-}
-
-void copy_user_highpage(struct page *to, struct page *from,
- unsigned long vaddr, struct vm_area_struct *vma)
-{
- unsigned long vto, vfrom, flags, kto, kfrom, pfrom, pto;
- kto = ((unsigned long)page_address(to) & PAGE_MASK);
- kfrom = ((unsigned long)page_address(from) & PAGE_MASK);
- pto = page_to_phys(to);
- pfrom = page_to_phys(from);
-
- local_irq_save(flags);
- if (aliasing(vaddr, (unsigned long)kfrom))
- cpu_dcache_wb_page((unsigned long)kfrom);
- vto = kremap0(vaddr, pto);
- vfrom = kremap1(vaddr, pfrom);
- copy_page((void *)vto, (void *)vfrom);
- kunmap01(vfrom);
- kunmap01(vto);
- local_irq_restore(flags);
-}
-
-EXPORT_SYMBOL(copy_user_highpage);
-
-void clear_user_highpage(struct page *page, unsigned long vaddr)
-{
- unsigned long vto, flags, kto;
-
- kto = ((unsigned long)page_address(page) & PAGE_MASK);
-
- local_irq_save(flags);
- if (aliasing(kto, vaddr) && kto != 0) {
- cpu_dcache_inval_page(kto);
- cpu_icache_inval_page(kto);
- }
- vto = kremap0(vaddr, page_to_phys(page));
- clear_page((void *)vto);
- kunmap01(vto);
- local_irq_restore(flags);
-}
-
-EXPORT_SYMBOL(clear_user_highpage);
-
-void flush_dcache_page(struct page *page)
-{
- struct address_space *mapping;
-
- mapping = page_mapping_file(page);
- if (mapping && !mapping_mapped(mapping))
- set_bit(PG_dcache_dirty, &page->flags);
- else {
- unsigned long kaddr, flags;
-
- kaddr = (unsigned long)page_address(page);
- local_irq_save(flags);
- cpu_dcache_wbinval_page(kaddr);
- if (mapping) {
- unsigned long vaddr, kto;
-
- vaddr = page->index << PAGE_SHIFT;
- if (aliasing(vaddr, kaddr)) {
- kto = kremap0(vaddr, page_to_phys(page));
- cpu_dcache_wbinval_page(kto);
- kunmap01(kto);
- }
- }
- local_irq_restore(flags);
- }
-}
-EXPORT_SYMBOL(flush_dcache_page);
-
-void copy_to_user_page(struct vm_area_struct *vma, struct page *page,
- unsigned long vaddr, void *dst, void *src, int len)
-{
- unsigned long line_size, start, end, vto, flags;
-
- local_irq_save(flags);
- vto = kremap0(vaddr, page_to_phys(page));
- dst = (void *)(vto | (vaddr & (PAGE_SIZE - 1)));
- memcpy(dst, src, len);
- if (vma->vm_flags & VM_EXEC) {
- line_size = L1_cache_info[DCACHE].line_size;
- start = (unsigned long)dst & ~(line_size - 1);
- end =
- ((unsigned long)dst + len + line_size - 1) & ~(line_size -
- 1);
- cpu_cache_wbinval_range(start, end, 1);
- }
- kunmap01(vto);
- local_irq_restore(flags);
-}
-
-void copy_from_user_page(struct vm_area_struct *vma, struct page *page,
- unsigned long vaddr, void *dst, void *src, int len)
-{
- unsigned long vto, flags;
-
- local_irq_save(flags);
- vto = kremap0(vaddr, page_to_phys(page));
- src = (void *)(vto | (vaddr & (PAGE_SIZE - 1)));
- memcpy(dst, src, len);
- kunmap01(vto);
- local_irq_restore(flags);
-}
-
-void flush_anon_page(struct vm_area_struct *vma,
- struct page *page, unsigned long vaddr)
-{
- unsigned long kaddr, flags, ktmp;
- if (!PageAnon(page))
- return;
-
- if (vma->vm_mm != current->active_mm)
- return;
-
- local_irq_save(flags);
- if (vma->vm_flags & VM_EXEC)
- cpu_icache_inval_page(vaddr & PAGE_MASK);
- kaddr = (unsigned long)page_address(page);
- if (aliasing(vaddr, kaddr)) {
- ktmp = kremap0(vaddr, page_to_phys(page));
- cpu_dcache_wbinval_page(ktmp);
- kunmap01(ktmp);
- }
- local_irq_restore(flags);
-}
-
-void flush_kernel_vmap_range(void *addr, int size)
-{
- unsigned long flags;
- local_irq_save(flags);
- cpu_dcache_wb_range((unsigned long)addr, (unsigned long)addr + size);
- local_irq_restore(flags);
-}
-EXPORT_SYMBOL(flush_kernel_vmap_range);
-
-void invalidate_kernel_vmap_range(void *addr, int size)
-{
- unsigned long flags;
- local_irq_save(flags);
- cpu_dcache_inval_range((unsigned long)addr, (unsigned long)addr + size);
- local_irq_restore(flags);
-}
-EXPORT_SYMBOL(invalidate_kernel_vmap_range);
-#endif
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