mirror of
https://github.com/brain-hackers/linux-brain.git
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nds32: Cache and TLB routines
This patch contains cache and TLB maintenance functions. Signed-off-by: Vincent Chen <vincentc@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Greentime Hu
parent
664eec400b
commit
7de9cf4740
12
arch/nds32/include/asm/cache.h
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12
arch/nds32/include/asm/cache.h
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// SPDX-License-Identifier: GPL-2.0
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// Copyright (C) 2005-2017 Andes Technology Corporation
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#ifndef __NDS32_CACHE_H__
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#define __NDS32_CACHE_H__
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#define L1_CACHE_BYTES 32
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#define L1_CACHE_SHIFT 5
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#define ARCH_DMA_MINALIGN L1_CACHE_BYTES
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#endif /* __NDS32_CACHE_H__ */
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13
arch/nds32/include/asm/cache_info.h
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13
arch/nds32/include/asm/cache_info.h
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// SPDX-License-Identifier: GPL-2.0
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// Copyright (C) 2005-2017 Andes Technology Corporation
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struct cache_info {
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unsigned char ways;
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unsigned char line_size;
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unsigned short sets;
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unsigned short size;
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#if defined(CONFIG_CPU_CACHE_ALIASING)
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unsigned short aliasing_num;
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unsigned int aliasing_mask;
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#endif
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};
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44
arch/nds32/include/asm/cacheflush.h
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44
arch/nds32/include/asm/cacheflush.h
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// SPDX-License-Identifier: GPL-2.0
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// Copyright (C) 2005-2017 Andes Technology Corporation
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#ifndef __NDS32_CACHEFLUSH_H__
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#define __NDS32_CACHEFLUSH_H__
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#include <linux/mm.h>
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#define PG_dcache_dirty PG_arch_1
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#ifdef CONFIG_CPU_CACHE_ALIASING
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void flush_cache_mm(struct mm_struct *mm);
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void flush_cache_dup_mm(struct mm_struct *mm);
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void flush_cache_range(struct vm_area_struct *vma,
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unsigned long start, unsigned long end);
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void flush_cache_page(struct vm_area_struct *vma,
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unsigned long addr, unsigned long pfn);
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void flush_cache_kmaps(void);
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void flush_cache_vmap(unsigned long start, unsigned long end);
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void flush_cache_vunmap(unsigned long start, unsigned long end);
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#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
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void flush_dcache_page(struct page *page);
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void copy_to_user_page(struct vm_area_struct *vma, struct page *page,
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unsigned long vaddr, void *dst, void *src, int len);
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void copy_from_user_page(struct vm_area_struct *vma, struct page *page,
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unsigned long vaddr, void *dst, void *src, int len);
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#define ARCH_HAS_FLUSH_ANON_PAGE
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void flush_anon_page(struct vm_area_struct *vma,
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struct page *page, unsigned long vaddr);
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#define ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE
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void flush_kernel_dcache_page(struct page *page);
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void flush_icache_range(unsigned long start, unsigned long end);
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void flush_icache_page(struct vm_area_struct *vma, struct page *page);
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#define flush_dcache_mmap_lock(mapping) spin_lock_irq(&(mapping)->tree_lock)
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#define flush_dcache_mmap_unlock(mapping) spin_unlock_irq(&(mapping)->tree_lock)
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#else
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#include <asm-generic/cacheflush.h>
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#endif
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#endif /* __NDS32_CACHEFLUSH_H__ */
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68
arch/nds32/include/asm/mmu_context.h
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68
arch/nds32/include/asm/mmu_context.h
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// SPDX-License-Identifier: GPL-2.0
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// Copyright (C) 2005-2017 Andes Technology Corporation
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#ifndef __ASM_NDS32_MMU_CONTEXT_H
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#define __ASM_NDS32_MMU_CONTEXT_H
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#include <linux/spinlock.h>
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#include <asm/tlbflush.h>
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#include <asm/proc-fns.h>
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#include <asm-generic/mm_hooks.h>
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static inline int
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init_new_context(struct task_struct *tsk, struct mm_struct *mm)
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{
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mm->context.id = 0;
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return 0;
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}
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#define destroy_context(mm) do { } while(0)
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#define CID_BITS 9
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extern spinlock_t cid_lock;
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extern unsigned int cpu_last_cid;
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static inline void __new_context(struct mm_struct *mm)
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{
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unsigned int cid;
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unsigned long flags;
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spin_lock_irqsave(&cid_lock, flags);
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cid = cpu_last_cid;
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cpu_last_cid += 1 << TLB_MISC_offCID;
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if (cpu_last_cid == 0)
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cpu_last_cid = 1 << TLB_MISC_offCID << CID_BITS;
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if ((cid & TLB_MISC_mskCID) == 0)
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flush_tlb_all();
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spin_unlock_irqrestore(&cid_lock, flags);
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mm->context.id = cid;
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}
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static inline void check_context(struct mm_struct *mm)
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{
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if (unlikely
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((mm->context.id ^ cpu_last_cid) >> TLB_MISC_offCID >> CID_BITS))
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__new_context(mm);
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}
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static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
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{
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}
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static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
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struct task_struct *tsk)
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{
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unsigned int cpu = smp_processor_id();
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if (!cpumask_test_and_set_cpu(cpu, mm_cpumask(next)) || prev != next) {
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check_context(next);
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cpu_switch_mm(next);
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}
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}
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#define deactivate_mm(tsk,mm) do { } while (0)
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#define activate_mm(prev,next) switch_mm(prev, next, NULL)
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#endif
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44
arch/nds32/include/asm/proc-fns.h
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44
arch/nds32/include/asm/proc-fns.h
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// SPDX-License-Identifier: GPL-2.0
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// Copyright (C) 2005-2017 Andes Technology Corporation
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#ifndef __NDS32_PROCFNS_H__
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#define __NDS32_PROCFNS_H__
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#ifdef __KERNEL__
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#include <asm/page.h>
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struct mm_struct;
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struct vm_area_struct;
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extern void cpu_proc_init(void);
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extern void cpu_proc_fin(void);
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extern void cpu_do_idle(void);
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extern void cpu_reset(unsigned long reset);
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extern void cpu_switch_mm(struct mm_struct *mm);
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extern void cpu_dcache_inval_all(void);
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extern void cpu_dcache_wbinval_all(void);
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extern void cpu_dcache_inval_page(unsigned long page);
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extern void cpu_dcache_wb_page(unsigned long page);
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extern void cpu_dcache_wbinval_page(unsigned long page);
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extern void cpu_dcache_inval_range(unsigned long start, unsigned long end);
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extern void cpu_dcache_wb_range(unsigned long start, unsigned long end);
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extern void cpu_dcache_wbinval_range(unsigned long start, unsigned long end);
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extern void cpu_icache_inval_all(void);
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extern void cpu_icache_inval_page(unsigned long page);
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extern void cpu_icache_inval_range(unsigned long start, unsigned long end);
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extern void cpu_cache_wbinval_page(unsigned long page, int flushi);
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extern void cpu_cache_wbinval_range(unsigned long start,
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unsigned long end, int flushi);
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extern void cpu_cache_wbinval_range_check(struct vm_area_struct *vma,
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unsigned long start,
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unsigned long end, bool flushi,
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bool wbd);
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extern void cpu_dma_wb_range(unsigned long start, unsigned long end);
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extern void cpu_dma_inval_range(unsigned long start, unsigned long end);
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extern void cpu_dma_wbinval_range(unsigned long start, unsigned long end);
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#endif /* __KERNEL__ */
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#endif /* __NDS32_PROCFNS_H__ */
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28
arch/nds32/include/asm/tlb.h
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arch/nds32/include/asm/tlb.h
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// SPDX-License-Identifier: GPL-2.0
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// Copyright (C) 2005-2017 Andes Technology Corporation
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#ifndef __ASMNDS32_TLB_H
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#define __ASMNDS32_TLB_H
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#define tlb_start_vma(tlb,vma) \
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do { \
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if (!tlb->fullmm) \
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flush_cache_range(vma, vma->vm_start, vma->vm_end); \
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} while (0)
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#define tlb_end_vma(tlb,vma) \
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do { \
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if(!tlb->fullmm) \
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flush_tlb_range(vma, vma->vm_start, vma->vm_end); \
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} while (0)
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#define __tlb_remove_tlb_entry(tlb, pte, addr) do { } while (0)
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#define tlb_flush(tlb) flush_tlb_mm((tlb)->mm)
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#include <asm-generic/tlb.h>
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#define __pte_free_tlb(tlb, pte, addr) pte_free((tlb)->mm, pte)
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#define __pmd_free_tlb(tlb, pmd, addr) pmd_free((tln)->mm, pmd)
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#endif
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47
arch/nds32/include/asm/tlbflush.h
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arch/nds32/include/asm/tlbflush.h
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// SPDX-License-Identifier: GPL-2.0
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// Copyright (C) 2005-2017 Andes Technology Corporation
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#ifndef _ASMNDS32_TLBFLUSH_H
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#define _ASMNDS32_TLBFLUSH_H
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#include <linux/spinlock.h>
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#include <linux/mm.h>
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#include <nds32_intrinsic.h>
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static inline void local_flush_tlb_all(void)
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{
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__nds32__tlbop_flua();
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__nds32__isb();
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}
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static inline void local_flush_tlb_mm(struct mm_struct *mm)
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{
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__nds32__tlbop_flua();
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__nds32__isb();
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}
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static inline void local_flush_tlb_kernel_range(unsigned long start,
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unsigned long end)
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{
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while (start < end) {
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__nds32__tlbop_inv(start);
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__nds32__isb();
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start += PAGE_SIZE;
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}
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}
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void local_flush_tlb_range(struct vm_area_struct *vma,
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unsigned long start, unsigned long end);
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void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long addr);
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#define flush_tlb_all local_flush_tlb_all
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#define flush_tlb_mm local_flush_tlb_mm
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#define flush_tlb_range local_flush_tlb_range
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#define flush_tlb_page local_flush_tlb_page
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#define flush_tlb_kernel_range local_flush_tlb_kernel_range
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void update_mmu_cache(struct vm_area_struct *vma,
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unsigned long address, pte_t * pte);
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void tlb_migrate_finish(struct mm_struct *mm);
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#endif
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14
arch/nds32/include/uapi/asm/cachectl.h
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14
arch/nds32/include/uapi/asm/cachectl.h
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// SPDX-License-Identifier: GPL-2.0
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// Copyright (C) 1994, 1995, 1996 by Ralf Baechle
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// Copyright (C) 2005-2017 Andes Technology Corporation
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#ifndef _ASM_CACHECTL
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#define _ASM_CACHECTL
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/*
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* Options for cacheflush system call
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*/
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#define ICACHE 0 /* flush instruction cache */
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#define DCACHE 1 /* writeback and flush data cache */
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#define BCACHE 2 /* flush instruction cache + writeback and flush data cache */
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#endif /* _ASM_CACHECTL */
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49
arch/nds32/kernel/cacheinfo.c
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49
arch/nds32/kernel/cacheinfo.c
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// SPDX-License-Identifier: GPL-2.0
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// Copyright (C) 2005-2017 Andes Technology Corporation
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#include <linux/bitops.h>
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#include <linux/cacheinfo.h>
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#include <linux/cpu.h>
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static void ci_leaf_init(struct cacheinfo *this_leaf,
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enum cache_type type, unsigned int level)
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{
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char cache_type = (type & CACHE_TYPE_INST ? ICACHE : DCACHE);
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this_leaf->level = level;
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this_leaf->type = type;
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this_leaf->coherency_line_size = CACHE_LINE_SIZE(cache_type);
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this_leaf->number_of_sets = CACHE_SET(cache_type);;
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this_leaf->ways_of_associativity = CACHE_WAY(cache_type);
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this_leaf->size = this_leaf->number_of_sets *
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this_leaf->coherency_line_size * this_leaf->ways_of_associativity;
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#if defined(CONFIG_CPU_DCACHE_WRITETHROUGH)
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this_leaf->attributes = CACHE_WRITE_THROUGH;
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#else
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this_leaf->attributes = CACHE_WRITE_BACK;
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#endif
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}
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int init_cache_level(unsigned int cpu)
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{
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struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
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/* Only 1 level and I/D cache seperate. */
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this_cpu_ci->num_levels = 1;
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this_cpu_ci->num_leaves = 2;
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return 0;
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}
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int populate_cache_leaves(unsigned int cpu)
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{
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unsigned int level, idx;
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struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
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struct cacheinfo *this_leaf = this_cpu_ci->info_list;
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for (idx = 0, level = 1; level <= this_cpu_ci->num_levels &&
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idx < this_cpu_ci->num_leaves; idx++, level++) {
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ci_leaf_init(this_leaf++, CACHE_TYPE_DATA, level);
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ci_leaf_init(this_leaf++, CACHE_TYPE_INST, level);
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}
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return 0;
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}
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322
arch/nds32/mm/cacheflush.c
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322
arch/nds32/mm/cacheflush.c
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// SPDX-License-Identifier: GPL-2.0
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// Copyright (C) 2005-2017 Andes Technology Corporation
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#include <linux/mm.h>
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#include <linux/sched.h>
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#include <linux/fs.h>
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#include <linux/pagemap.h>
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#include <linux/module.h>
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#include <asm/cacheflush.h>
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#include <asm/proc-fns.h>
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#include <asm/shmparam.h>
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#include <asm/cache_info.h>
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extern struct cache_info L1_cache_info[2];
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#ifndef CONFIG_CPU_CACHE_ALIASING
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void update_mmu_cache(struct vm_area_struct *vma, unsigned long addr,
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pte_t * pte)
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{
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struct page *page;
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unsigned long pfn = pte_pfn(*pte);
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unsigned long flags;
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if (!pfn_valid(pfn))
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return;
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if (vma->vm_mm == current->active_mm) {
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local_irq_save(flags);
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__nds32__mtsr_dsb(addr, NDS32_SR_TLB_VPN);
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__nds32__tlbop_rwr(*pte);
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__nds32__isb();
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local_irq_restore(flags);
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}
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page = pfn_to_page(pfn);
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if ((test_and_clear_bit(PG_dcache_dirty, &page->flags)) ||
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(vma->vm_flags & VM_EXEC)) {
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if (!PageHighMem(page)) {
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cpu_cache_wbinval_page((unsigned long)
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page_address(page),
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vma->vm_flags & VM_EXEC);
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} else {
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unsigned long kaddr = (unsigned long)kmap_atomic(page);
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cpu_cache_wbinval_page(kaddr, vma->vm_flags & VM_EXEC);
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kunmap_atomic((void *)kaddr);
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}
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}
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}
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#else
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extern pte_t va_present(struct mm_struct *mm, unsigned long addr);
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static inline unsigned long aliasing(unsigned long addr, unsigned long page)
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{
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return ((addr & PAGE_MASK) ^ page) & (SHMLBA - 1);
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}
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static inline unsigned long kremap0(unsigned long uaddr, unsigned long pa)
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{
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unsigned long kaddr, pte;
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#define BASE_ADDR0 0xffffc000
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kaddr = BASE_ADDR0 | (uaddr & L1_cache_info[DCACHE].aliasing_mask);
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pte = (pa | PAGE_KERNEL);
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__nds32__mtsr_dsb(kaddr, NDS32_SR_TLB_VPN);
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__nds32__tlbop_rwlk(pte);
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__nds32__isb();
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return kaddr;
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}
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static inline void kunmap01(unsigned long kaddr)
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{
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__nds32__tlbop_unlk(kaddr);
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__nds32__tlbop_inv(kaddr);
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__nds32__isb();
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}
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static inline unsigned long kremap1(unsigned long uaddr, unsigned long pa)
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{
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unsigned long kaddr, pte;
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#define BASE_ADDR1 0xffff8000
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kaddr = BASE_ADDR1 | (uaddr & L1_cache_info[DCACHE].aliasing_mask);
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pte = (pa | PAGE_KERNEL);
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__nds32__mtsr_dsb(kaddr, NDS32_SR_TLB_VPN);
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__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_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);
|
||||
|
||||
if (aliasing(vaddr, (unsigned long)kfrom))
|
||||
cpu_dcache_wb_page((unsigned long)kfrom);
|
||||
if (aliasing(vaddr, (unsigned long)kto))
|
||||
cpu_dcache_inval_page((unsigned long)kto);
|
||||
local_irq_save(flags);
|
||||
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(page);
|
||||
if (mapping && !mapping_mapped(mapping))
|
||||
set_bit(PG_dcache_dirty, &page->flags);
|
||||
else {
|
||||
int i, pc;
|
||||
unsigned long vto, kaddr, flags;
|
||||
kaddr = (unsigned long)page_address(page);
|
||||
cpu_dcache_wbinval_page(kaddr);
|
||||
pc = CACHE_SET(DCACHE) * CACHE_LINE_SIZE(DCACHE) / PAGE_SIZE;
|
||||
local_irq_save(flags);
|
||||
for (i = 0; i < pc; i++) {
|
||||
vto =
|
||||
kremap0(kaddr + i * PAGE_SIZE, page_to_phys(page));
|
||||
cpu_dcache_wbinval_page(vto);
|
||||
kunmap01(vto);
|
||||
}
|
||||
local_irq_restore(flags);
|
||||
}
|
||||
}
|
||||
|
||||
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 flags;
|
||||
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);
|
||||
cpu_dcache_wbinval_page((unsigned long)page_address(page));
|
||||
local_irq_restore(flags);
|
||||
}
|
||||
|
||||
void flush_kernel_dcache_page(struct page *page)
|
||||
{
|
||||
unsigned long flags;
|
||||
local_irq_save(flags);
|
||||
cpu_dcache_wbinval_page((unsigned long)page_address(page));
|
||||
local_irq_restore(flags);
|
||||
}
|
||||
|
||||
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);
|
||||
}
|
||||
|
||||
void flush_icache_page(struct vm_area_struct *vma, struct page *page)
|
||||
{
|
||||
unsigned long flags;
|
||||
local_irq_save(flags);
|
||||
cpu_cache_wbinval_page((unsigned long)page_address(page),
|
||||
vma->vm_flags & VM_EXEC);
|
||||
local_irq_restore(flags);
|
||||
}
|
||||
|
||||
void update_mmu_cache(struct vm_area_struct *vma, unsigned long addr,
|
||||
pte_t * pte)
|
||||
{
|
||||
struct page *page;
|
||||
unsigned long flags;
|
||||
unsigned long pfn = pte_pfn(*pte);
|
||||
|
||||
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)) {
|
||||
local_irq_save(flags);
|
||||
cpu_dcache_wbinval_page((unsigned long)page_address(page));
|
||||
local_irq_restore(flags);
|
||||
}
|
||||
}
|
||||
#endif
|
||||
533
arch/nds32/mm/proc.c
Normal file
533
arch/nds32/mm/proc.c
Normal file
|
|
@ -0,0 +1,533 @@
|
|||
// SPDX-License-Identifier: GPL-2.0
|
||||
// Copyright (C) 2005-2017 Andes Technology Corporation
|
||||
|
||||
#include <linux/module.h>
|
||||
#include <linux/sched.h>
|
||||
#include <linux/mm.h>
|
||||
#include <asm/nds32.h>
|
||||
#include <asm/pgtable.h>
|
||||
#include <asm/tlbflush.h>
|
||||
#include <asm/cacheflush.h>
|
||||
#include <asm/l2_cache.h>
|
||||
#include <nds32_intrinsic.h>
|
||||
|
||||
#include <asm/cache_info.h>
|
||||
extern struct cache_info L1_cache_info[2];
|
||||
|
||||
int va_kernel_present(unsigned long addr)
|
||||
{
|
||||
pmd_t *pmd;
|
||||
pte_t *ptep, pte;
|
||||
|
||||
pmd = pmd_offset(pgd_offset_k(addr), addr);
|
||||
if (!pmd_none(*pmd)) {
|
||||
ptep = pte_offset_map(pmd, addr);
|
||||
pte = *ptep;
|
||||
if (pte_present(pte))
|
||||
return pte;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
pte_t va_present(struct mm_struct * mm, unsigned long addr)
|
||||
{
|
||||
pgd_t *pgd;
|
||||
pud_t *pud;
|
||||
pmd_t *pmd;
|
||||
pte_t *ptep, pte;
|
||||
|
||||
pgd = pgd_offset(mm, addr);
|
||||
if (!pgd_none(*pgd)) {
|
||||
pud = pud_offset(pgd, addr);
|
||||
if (!pud_none(*pud)) {
|
||||
pmd = pmd_offset(pud, addr);
|
||||
if (!pmd_none(*pmd)) {
|
||||
ptep = pte_offset_map(pmd, addr);
|
||||
pte = *ptep;
|
||||
if (pte_present(pte))
|
||||
return pte;
|
||||
}
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
|
||||
}
|
||||
|
||||
int va_readable(struct pt_regs *regs, unsigned long addr)
|
||||
{
|
||||
struct mm_struct *mm = current->mm;
|
||||
pte_t pte;
|
||||
int ret = 0;
|
||||
|
||||
if (user_mode(regs)) {
|
||||
/* user mode */
|
||||
pte = va_present(mm, addr);
|
||||
if (!pte && pte_read(pte))
|
||||
ret = 1;
|
||||
} else {
|
||||
/* superuser mode is always readable, so we can only
|
||||
* check it is present or not*/
|
||||
return (! !va_kernel_present(addr));
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
int va_writable(struct pt_regs *regs, unsigned long addr)
|
||||
{
|
||||
struct mm_struct *mm = current->mm;
|
||||
pte_t pte;
|
||||
int ret = 0;
|
||||
|
||||
if (user_mode(regs)) {
|
||||
/* user mode */
|
||||
pte = va_present(mm, addr);
|
||||
if (!pte && pte_write(pte))
|
||||
ret = 1;
|
||||
} else {
|
||||
/* superuser mode */
|
||||
pte = va_kernel_present(addr);
|
||||
if (!pte && pte_kernel_write(pte))
|
||||
ret = 1;
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
/*
|
||||
* All
|
||||
*/
|
||||
void cpu_icache_inval_all(void)
|
||||
{
|
||||
unsigned long end, line_size;
|
||||
|
||||
line_size = L1_cache_info[ICACHE].line_size;
|
||||
end =
|
||||
line_size * L1_cache_info[ICACHE].ways * L1_cache_info[ICACHE].sets;
|
||||
|
||||
do {
|
||||
end -= line_size;
|
||||
__asm__ volatile ("\n\tcctl %0, L1I_IX_INVAL"::"r" (end));
|
||||
end -= line_size;
|
||||
__asm__ volatile ("\n\tcctl %0, L1I_IX_INVAL"::"r" (end));
|
||||
end -= line_size;
|
||||
__asm__ volatile ("\n\tcctl %0, L1I_IX_INVAL"::"r" (end));
|
||||
end -= line_size;
|
||||
__asm__ volatile ("\n\tcctl %0, L1I_IX_INVAL"::"r" (end));
|
||||
} while (end > 0);
|
||||
__nds32__isb();
|
||||
}
|
||||
|
||||
void cpu_dcache_inval_all(void)
|
||||
{
|
||||
__nds32__cctl_l1d_invalall();
|
||||
}
|
||||
|
||||
#ifdef CONFIG_CACHE_L2
|
||||
void dcache_wb_all_level(void)
|
||||
{
|
||||
unsigned long flags, cmd;
|
||||
local_irq_save(flags);
|
||||
__nds32__cctl_l1d_wball_alvl();
|
||||
/* Section 1: Ensure the section 2 & 3 program code execution after */
|
||||
__nds32__cctlidx_read(NDS32_CCTL_L1D_IX_RWD,0);
|
||||
|
||||
/* Section 2: Confirm the writeback all level is done in CPU and L2C */
|
||||
cmd = CCTL_CMD_L2_SYNC;
|
||||
L2_CMD_RDY();
|
||||
L2C_W_REG(L2_CCTL_CMD_OFF, cmd);
|
||||
L2_CMD_RDY();
|
||||
|
||||
/* Section 3: Writeback whole L2 cache */
|
||||
cmd = CCTL_ALL_CMD | CCTL_CMD_L2_IX_WB;
|
||||
L2_CMD_RDY();
|
||||
L2C_W_REG(L2_CCTL_CMD_OFF, cmd);
|
||||
L2_CMD_RDY();
|
||||
__nds32__msync_all();
|
||||
local_irq_restore(flags);
|
||||
}
|
||||
EXPORT_SYMBOL(dcache_wb_all_level);
|
||||
#endif
|
||||
|
||||
void cpu_dcache_wb_all(void)
|
||||
{
|
||||
__nds32__cctl_l1d_wball_one_lvl();
|
||||
__nds32__cctlidx_read(NDS32_CCTL_L1D_IX_RWD,0);
|
||||
}
|
||||
|
||||
void cpu_dcache_wbinval_all(void)
|
||||
{
|
||||
#ifndef CONFIG_CPU_DCACHE_WRITETHROUGH
|
||||
unsigned long flags;
|
||||
local_irq_save(flags);
|
||||
#endif
|
||||
cpu_dcache_wb_all();
|
||||
cpu_dcache_inval_all();
|
||||
#ifndef CONFIG_CPU_DCACHE_WRITETHROUGH
|
||||
local_irq_restore(flags);
|
||||
#endif
|
||||
}
|
||||
|
||||
/*
|
||||
* Page
|
||||
*/
|
||||
void cpu_icache_inval_page(unsigned long start)
|
||||
{
|
||||
unsigned long line_size, end;
|
||||
|
||||
line_size = L1_cache_info[ICACHE].line_size;
|
||||
end = start + PAGE_SIZE;
|
||||
|
||||
do {
|
||||
end -= line_size;
|
||||
__asm__ volatile ("\n\tcctl %0, L1I_VA_INVAL"::"r" (end));
|
||||
end -= line_size;
|
||||
__asm__ volatile ("\n\tcctl %0, L1I_VA_INVAL"::"r" (end));
|
||||
end -= line_size;
|
||||
__asm__ volatile ("\n\tcctl %0, L1I_VA_INVAL"::"r" (end));
|
||||
end -= line_size;
|
||||
__asm__ volatile ("\n\tcctl %0, L1I_VA_INVAL"::"r" (end));
|
||||
} while (end != start);
|
||||
__nds32__isb();
|
||||
}
|
||||
|
||||
void cpu_dcache_inval_page(unsigned long start)
|
||||
{
|
||||
unsigned long line_size, end;
|
||||
|
||||
line_size = L1_cache_info[DCACHE].line_size;
|
||||
end = start + PAGE_SIZE;
|
||||
|
||||
do {
|
||||
end -= line_size;
|
||||
__asm__ volatile ("\n\tcctl %0, L1D_VA_INVAL"::"r" (end));
|
||||
end -= line_size;
|
||||
__asm__ volatile ("\n\tcctl %0, L1D_VA_INVAL"::"r" (end));
|
||||
end -= line_size;
|
||||
__asm__ volatile ("\n\tcctl %0, L1D_VA_INVAL"::"r" (end));
|
||||
end -= line_size;
|
||||
__asm__ volatile ("\n\tcctl %0, L1D_VA_INVAL"::"r" (end));
|
||||
} while (end != start);
|
||||
}
|
||||
|
||||
void cpu_dcache_wb_page(unsigned long start)
|
||||
{
|
||||
#ifndef CONFIG_CPU_DCACHE_WRITETHROUGH
|
||||
unsigned long line_size, end;
|
||||
|
||||
line_size = L1_cache_info[DCACHE].line_size;
|
||||
end = start + PAGE_SIZE;
|
||||
|
||||
do {
|
||||
end -= line_size;
|
||||
__asm__ volatile ("\n\tcctl %0, L1D_VA_WB"::"r" (end));
|
||||
end -= line_size;
|
||||
__asm__ volatile ("\n\tcctl %0, L1D_VA_WB"::"r" (end));
|
||||
end -= line_size;
|
||||
__asm__ volatile ("\n\tcctl %0, L1D_VA_WB"::"r" (end));
|
||||
end -= line_size;
|
||||
__asm__ volatile ("\n\tcctl %0, L1D_VA_WB"::"r" (end));
|
||||
} while (end != start);
|
||||
__nds32__cctlidx_read(NDS32_CCTL_L1D_IX_RWD,0);
|
||||
#endif
|
||||
}
|
||||
|
||||
void cpu_dcache_wbinval_page(unsigned long start)
|
||||
{
|
||||
unsigned long line_size, end;
|
||||
|
||||
line_size = L1_cache_info[DCACHE].line_size;
|
||||
end = start + PAGE_SIZE;
|
||||
|
||||
do {
|
||||
end -= line_size;
|
||||
#ifndef CONFIG_CPU_DCACHE_WRITETHROUGH
|
||||
__asm__ volatile ("\n\tcctl %0, L1D_VA_WB"::"r" (end));
|
||||
#endif
|
||||
__asm__ volatile ("\n\tcctl %0, L1D_VA_INVAL"::"r" (end));
|
||||
end -= line_size;
|
||||
#ifndef CONFIG_CPU_DCACHE_WRITETHROUGH
|
||||
__asm__ volatile ("\n\tcctl %0, L1D_VA_WB"::"r" (end));
|
||||
#endif
|
||||
__asm__ volatile ("\n\tcctl %0, L1D_VA_INVAL"::"r" (end));
|
||||
end -= line_size;
|
||||
#ifndef CONFIG_CPU_DCACHE_WRITETHROUGH
|
||||
__asm__ volatile ("\n\tcctl %0, L1D_VA_WB"::"r" (end));
|
||||
#endif
|
||||
__asm__ volatile ("\n\tcctl %0, L1D_VA_INVAL"::"r" (end));
|
||||
end -= line_size;
|
||||
#ifndef CONFIG_CPU_DCACHE_WRITETHROUGH
|
||||
__asm__ volatile ("\n\tcctl %0, L1D_VA_WB"::"r" (end));
|
||||
#endif
|
||||
__asm__ volatile ("\n\tcctl %0, L1D_VA_INVAL"::"r" (end));
|
||||
} while (end != start);
|
||||
__nds32__cctlidx_read(NDS32_CCTL_L1D_IX_RWD,0);
|
||||
}
|
||||
|
||||
void cpu_cache_wbinval_page(unsigned long page, int flushi)
|
||||
{
|
||||
cpu_dcache_wbinval_page(page);
|
||||
if (flushi)
|
||||
cpu_icache_inval_page(page);
|
||||
}
|
||||
|
||||
/*
|
||||
* Range
|
||||
*/
|
||||
void cpu_icache_inval_range(unsigned long start, unsigned long end)
|
||||
{
|
||||
unsigned long line_size;
|
||||
|
||||
line_size = L1_cache_info[ICACHE].line_size;
|
||||
|
||||
while (end > start) {
|
||||
__asm__ volatile ("\n\tcctl %0, L1I_VA_INVAL"::"r" (start));
|
||||
start += line_size;
|
||||
}
|
||||
__nds32__isb();
|
||||
}
|
||||
|
||||
void cpu_dcache_inval_range(unsigned long start, unsigned long end)
|
||||
{
|
||||
unsigned long line_size;
|
||||
|
||||
line_size = L1_cache_info[DCACHE].line_size;
|
||||
|
||||
while (end > start) {
|
||||
__asm__ volatile ("\n\tcctl %0, L1D_VA_INVAL"::"r" (start));
|
||||
start += line_size;
|
||||
}
|
||||
}
|
||||
|
||||
void cpu_dcache_wb_range(unsigned long start, unsigned long end)
|
||||
{
|
||||
#ifndef CONFIG_CPU_DCACHE_WRITETHROUGH
|
||||
unsigned long line_size;
|
||||
|
||||
line_size = L1_cache_info[DCACHE].line_size;
|
||||
|
||||
while (end > start) {
|
||||
__asm__ volatile ("\n\tcctl %0, L1D_VA_WB"::"r" (start));
|
||||
start += line_size;
|
||||
}
|
||||
__nds32__cctlidx_read(NDS32_CCTL_L1D_IX_RWD,0);
|
||||
#endif
|
||||
}
|
||||
|
||||
void cpu_dcache_wbinval_range(unsigned long start, unsigned long end)
|
||||
{
|
||||
unsigned long line_size;
|
||||
|
||||
line_size = L1_cache_info[DCACHE].line_size;
|
||||
|
||||
while (end > start) {
|
||||
#ifndef CONFIG_CPU_DCACHE_WRITETHROUGH
|
||||
__asm__ volatile ("\n\tcctl %0, L1D_VA_WB"::"r" (start));
|
||||
#endif
|
||||
__asm__ volatile ("\n\tcctl %0, L1D_VA_INVAL"::"r" (start));
|
||||
start += line_size;
|
||||
}
|
||||
__nds32__cctlidx_read(NDS32_CCTL_L1D_IX_RWD,0);
|
||||
}
|
||||
|
||||
void cpu_cache_wbinval_range(unsigned long start, unsigned long end, int flushi)
|
||||
{
|
||||
unsigned long line_size, align_start, align_end;
|
||||
|
||||
line_size = L1_cache_info[DCACHE].line_size;
|
||||
align_start = start & ~(line_size - 1);
|
||||
align_end = (end + line_size - 1) & ~(line_size - 1);
|
||||
cpu_dcache_wbinval_range(align_start, align_end);
|
||||
|
||||
if (flushi) {
|
||||
line_size = L1_cache_info[ICACHE].line_size;
|
||||
align_start = start & ~(line_size - 1);
|
||||
align_end = (end + line_size - 1) & ~(line_size - 1);
|
||||
cpu_icache_inval_range(align_start, align_end);
|
||||
}
|
||||
}
|
||||
|
||||
void cpu_cache_wbinval_range_check(struct vm_area_struct *vma,
|
||||
unsigned long start, unsigned long end,
|
||||
bool flushi, bool wbd)
|
||||
{
|
||||
unsigned long line_size, t_start, t_end;
|
||||
|
||||
if (!flushi && !wbd)
|
||||
return;
|
||||
line_size = L1_cache_info[DCACHE].line_size;
|
||||
start = start & ~(line_size - 1);
|
||||
end = (end + line_size - 1) & ~(line_size - 1);
|
||||
|
||||
if ((end - start) > (8 * PAGE_SIZE)) {
|
||||
if (wbd)
|
||||
cpu_dcache_wbinval_all();
|
||||
if (flushi)
|
||||
cpu_icache_inval_all();
|
||||
return;
|
||||
}
|
||||
|
||||
t_start = (start + PAGE_SIZE) & PAGE_MASK;
|
||||
t_end = ((end - 1) & PAGE_MASK);
|
||||
|
||||
if ((start & PAGE_MASK) == t_end) {
|
||||
if (va_present(vma->vm_mm, start)) {
|
||||
if (wbd)
|
||||
cpu_dcache_wbinval_range(start, end);
|
||||
if (flushi)
|
||||
cpu_icache_inval_range(start, end);
|
||||
}
|
||||
return;
|
||||
}
|
||||
|
||||
if (va_present(vma->vm_mm, start)) {
|
||||
if (wbd)
|
||||
cpu_dcache_wbinval_range(start, t_start);
|
||||
if (flushi)
|
||||
cpu_icache_inval_range(start, t_start);
|
||||
}
|
||||
|
||||
if (va_present(vma->vm_mm, end - 1)) {
|
||||
if (wbd)
|
||||
cpu_dcache_wbinval_range(t_end, end);
|
||||
if (flushi)
|
||||
cpu_icache_inval_range(t_end, end);
|
||||
}
|
||||
|
||||
while (t_start < t_end) {
|
||||
if (va_present(vma->vm_mm, t_start)) {
|
||||
if (wbd)
|
||||
cpu_dcache_wbinval_page(t_start);
|
||||
if (flushi)
|
||||
cpu_icache_inval_page(t_start);
|
||||
}
|
||||
t_start += PAGE_SIZE;
|
||||
}
|
||||
}
|
||||
|
||||
#ifdef CONFIG_CACHE_L2
|
||||
static inline void cpu_l2cache_op(unsigned long start, unsigned long end, unsigned long op)
|
||||
{
|
||||
if (atl2c_base) {
|
||||
unsigned long p_start = __pa(start);
|
||||
unsigned long p_end = __pa(end);
|
||||
unsigned long cmd;
|
||||
unsigned long line_size;
|
||||
/* TODO Can Use PAGE Mode to optimize if range large than PAGE_SIZE */
|
||||
line_size = L2_CACHE_LINE_SIZE();
|
||||
p_start = p_start & (~(line_size - 1));
|
||||
p_end = (p_end + line_size - 1) & (~(line_size - 1));
|
||||
cmd =
|
||||
(p_start & ~(line_size - 1)) | op |
|
||||
CCTL_SINGLE_CMD;
|
||||
do {
|
||||
L2_CMD_RDY();
|
||||
L2C_W_REG(L2_CCTL_CMD_OFF, cmd);
|
||||
cmd += line_size;
|
||||
p_start += line_size;
|
||||
} while (p_end > p_start);
|
||||
cmd = CCTL_CMD_L2_SYNC;
|
||||
L2_CMD_RDY();
|
||||
L2C_W_REG(L2_CCTL_CMD_OFF, cmd);
|
||||
L2_CMD_RDY();
|
||||
}
|
||||
}
|
||||
#else
|
||||
#define cpu_l2cache_op(start,end,op) do { } while (0)
|
||||
#endif
|
||||
/*
|
||||
* DMA
|
||||
*/
|
||||
void cpu_dma_wb_range(unsigned long start, unsigned long end)
|
||||
{
|
||||
unsigned long line_size;
|
||||
unsigned long flags;
|
||||
line_size = L1_cache_info[DCACHE].line_size;
|
||||
start = start & (~(line_size - 1));
|
||||
end = (end + line_size - 1) & (~(line_size - 1));
|
||||
if (unlikely(start == end))
|
||||
return;
|
||||
|
||||
local_irq_save(flags);
|
||||
cpu_dcache_wb_range(start, end);
|
||||
cpu_l2cache_op(start, end, CCTL_CMD_L2_PA_WB);
|
||||
__nds32__msync_all();
|
||||
local_irq_restore(flags);
|
||||
}
|
||||
|
||||
void cpu_dma_inval_range(unsigned long start, unsigned long end)
|
||||
{
|
||||
unsigned long line_size;
|
||||
unsigned long old_start = start;
|
||||
unsigned long old_end = end;
|
||||
unsigned long flags;
|
||||
line_size = L1_cache_info[DCACHE].line_size;
|
||||
start = start & (~(line_size - 1));
|
||||
end = (end + line_size - 1) & (~(line_size - 1));
|
||||
if (unlikely(start == end))
|
||||
return;
|
||||
local_irq_save(flags);
|
||||
if (start != old_start) {
|
||||
cpu_dcache_wbinval_range(start, start + line_size);
|
||||
cpu_l2cache_op(start, start + line_size, CCTL_CMD_L2_PA_WBINVAL);
|
||||
}
|
||||
if (end != old_end) {
|
||||
cpu_dcache_wbinval_range(end - line_size, end);
|
||||
cpu_l2cache_op(end - line_size, end, CCTL_CMD_L2_PA_WBINVAL);
|
||||
}
|
||||
cpu_dcache_inval_range(start, end);
|
||||
cpu_l2cache_op(start, end, CCTL_CMD_L2_PA_INVAL);
|
||||
__nds32__msync_all();
|
||||
local_irq_restore(flags);
|
||||
|
||||
}
|
||||
|
||||
void cpu_dma_wbinval_range(unsigned long start, unsigned long end)
|
||||
{
|
||||
unsigned long line_size;
|
||||
unsigned long flags;
|
||||
line_size = L1_cache_info[DCACHE].line_size;
|
||||
start = start & (~(line_size - 1));
|
||||
end = (end + line_size - 1) & (~(line_size - 1));
|
||||
if (unlikely(start == end))
|
||||
return;
|
||||
|
||||
local_irq_save(flags);
|
||||
cpu_dcache_wbinval_range(start, end);
|
||||
cpu_l2cache_op(start, end, CCTL_CMD_L2_PA_WBINVAL);
|
||||
__nds32__msync_all();
|
||||
local_irq_restore(flags);
|
||||
}
|
||||
|
||||
void cpu_proc_init(void)
|
||||
{
|
||||
}
|
||||
|
||||
void cpu_proc_fin(void)
|
||||
{
|
||||
}
|
||||
|
||||
void cpu_do_idle(void)
|
||||
{
|
||||
__nds32__standby_no_wake_grant();
|
||||
}
|
||||
|
||||
void cpu_reset(unsigned long reset)
|
||||
{
|
||||
u32 tmp;
|
||||
GIE_DISABLE();
|
||||
tmp = __nds32__mfsr(NDS32_SR_CACHE_CTL);
|
||||
tmp &= ~(CACHE_CTL_mskIC_EN | CACHE_CTL_mskDC_EN);
|
||||
__nds32__mtsr_isb(tmp, NDS32_SR_CACHE_CTL);
|
||||
cpu_dcache_wbinval_all();
|
||||
cpu_icache_inval_all();
|
||||
|
||||
__asm__ __volatile__("jr.toff %0\n\t"::"r"(reset));
|
||||
}
|
||||
|
||||
void cpu_switch_mm(struct mm_struct *mm)
|
||||
{
|
||||
unsigned long cid;
|
||||
cid = __nds32__mfsr(NDS32_SR_TLB_MISC);
|
||||
cid = (cid & ~TLB_MISC_mskCID) | mm->context.id;
|
||||
__nds32__mtsr_dsb(cid, NDS32_SR_TLB_MISC);
|
||||
__nds32__mtsr_isb(__pa(mm->pgd), NDS32_SR_L1_PPTB);
|
||||
}
|
||||
50
arch/nds32/mm/tlb.c
Normal file
50
arch/nds32/mm/tlb.c
Normal file
|
|
@ -0,0 +1,50 @@
|
|||
// SPDX-License-Identifier: GPL-2.0
|
||||
// Copyright (C) 2005-2017 Andes Technology Corporation
|
||||
|
||||
#include <linux/spinlock_types.h>
|
||||
#include <linux/mm.h>
|
||||
#include <linux/sched.h>
|
||||
#include <asm/nds32.h>
|
||||
#include <nds32_intrinsic.h>
|
||||
|
||||
unsigned int cpu_last_cid = { TLB_MISC_mskCID + (2 << TLB_MISC_offCID) };
|
||||
|
||||
DEFINE_SPINLOCK(cid_lock);
|
||||
|
||||
void local_flush_tlb_range(struct vm_area_struct *vma,
|
||||
unsigned long start, unsigned long end)
|
||||
{
|
||||
unsigned long flags, ocid, ncid;
|
||||
|
||||
if ((end - start) > 0x400000) {
|
||||
__nds32__tlbop_flua();
|
||||
__nds32__isb();
|
||||
return;
|
||||
}
|
||||
|
||||
spin_lock_irqsave(&cid_lock, flags);
|
||||
ocid = __nds32__mfsr(NDS32_SR_TLB_MISC);
|
||||
ncid = (ocid & ~TLB_MISC_mskCID) | vma->vm_mm->context.id;
|
||||
__nds32__mtsr_dsb(ncid, NDS32_SR_TLB_MISC);
|
||||
while (start < end) {
|
||||
__nds32__tlbop_inv(start);
|
||||
__nds32__isb();
|
||||
start += PAGE_SIZE;
|
||||
}
|
||||
__nds32__mtsr_dsb(ocid, NDS32_SR_TLB_MISC);
|
||||
spin_unlock_irqrestore(&cid_lock, flags);
|
||||
}
|
||||
|
||||
void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long addr)
|
||||
{
|
||||
unsigned long flags, ocid, ncid;
|
||||
|
||||
spin_lock_irqsave(&cid_lock, flags);
|
||||
ocid = __nds32__mfsr(NDS32_SR_TLB_MISC);
|
||||
ncid = (ocid & ~TLB_MISC_mskCID) | vma->vm_mm->context.id;
|
||||
__nds32__mtsr_dsb(ncid, NDS32_SR_TLB_MISC);
|
||||
__nds32__tlbop_inv(addr);
|
||||
__nds32__isb();
|
||||
__nds32__mtsr_dsb(ocid, NDS32_SR_TLB_MISC);
|
||||
spin_unlock_irqrestore(&cid_lock, flags);
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user