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279 lines
6.0 KiB
279 lines
6.0 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _M68K_TLBFLUSH_H |
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#define _M68K_TLBFLUSH_H |
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#ifdef CONFIG_MMU |
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#ifndef CONFIG_SUN3 |
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#include <asm/current.h> |
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#include <asm/mcfmmu.h> |
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static inline void flush_tlb_kernel_page(void *addr) |
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{ |
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if (CPU_IS_COLDFIRE) { |
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mmu_write(MMUOR, MMUOR_CNL); |
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} else if (CPU_IS_040_OR_060) { |
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mm_segment_t old_fs = get_fs(); |
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set_fs(KERNEL_DS); |
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__asm__ __volatile__(".chip 68040\n\t" |
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"pflush (%0)\n\t" |
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".chip 68k" |
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: : "a" (addr)); |
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set_fs(old_fs); |
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} else if (CPU_IS_020_OR_030) |
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__asm__ __volatile__("pflush #4,#4,(%0)" : : "a" (addr)); |
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} |
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/* |
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* flush all user-space atc entries. |
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*/ |
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static inline void __flush_tlb(void) |
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{ |
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if (CPU_IS_COLDFIRE) { |
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mmu_write(MMUOR, MMUOR_CNL); |
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} else if (CPU_IS_040_OR_060) { |
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__asm__ __volatile__(".chip 68040\n\t" |
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"pflushan\n\t" |
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".chip 68k"); |
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} else if (CPU_IS_020_OR_030) { |
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__asm__ __volatile__("pflush #0,#4"); |
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} |
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} |
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static inline void __flush_tlb040_one(unsigned long addr) |
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{ |
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__asm__ __volatile__(".chip 68040\n\t" |
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"pflush (%0)\n\t" |
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".chip 68k" |
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: : "a" (addr)); |
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} |
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static inline void __flush_tlb_one(unsigned long addr) |
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{ |
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if (CPU_IS_COLDFIRE) |
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mmu_write(MMUOR, MMUOR_CNL); |
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else if (CPU_IS_040_OR_060) |
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__flush_tlb040_one(addr); |
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else if (CPU_IS_020_OR_030) |
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__asm__ __volatile__("pflush #0,#4,(%0)" : : "a" (addr)); |
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} |
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#define flush_tlb() __flush_tlb() |
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/* |
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* flush all atc entries (both kernel and user-space entries). |
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*/ |
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static inline void flush_tlb_all(void) |
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{ |
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if (CPU_IS_COLDFIRE) { |
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mmu_write(MMUOR, MMUOR_CNL); |
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} else if (CPU_IS_040_OR_060) { |
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__asm__ __volatile__(".chip 68040\n\t" |
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"pflusha\n\t" |
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".chip 68k"); |
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} else if (CPU_IS_020_OR_030) { |
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__asm__ __volatile__("pflusha"); |
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} |
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} |
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static inline void flush_tlb_mm(struct mm_struct *mm) |
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{ |
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if (mm == current->active_mm) |
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__flush_tlb(); |
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} |
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static inline void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr) |
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{ |
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if (vma->vm_mm == current->active_mm) { |
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mm_segment_t old_fs = force_uaccess_begin(); |
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__flush_tlb_one(addr); |
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force_uaccess_end(old_fs); |
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} |
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} |
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static inline void flush_tlb_range(struct vm_area_struct *vma, |
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unsigned long start, unsigned long end) |
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{ |
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if (vma->vm_mm == current->active_mm) |
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__flush_tlb(); |
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} |
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static inline void flush_tlb_kernel_range(unsigned long start, unsigned long end) |
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{ |
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flush_tlb_all(); |
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} |
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#else |
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/* Reserved PMEGs. */ |
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extern char sun3_reserved_pmeg[SUN3_PMEGS_NUM]; |
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extern unsigned long pmeg_vaddr[SUN3_PMEGS_NUM]; |
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extern unsigned char pmeg_alloc[SUN3_PMEGS_NUM]; |
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extern unsigned char pmeg_ctx[SUN3_PMEGS_NUM]; |
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/* Flush all userspace mappings one by one... (why no flush command, |
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sun?) */ |
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static inline void flush_tlb_all(void) |
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{ |
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unsigned long addr; |
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unsigned char ctx, oldctx; |
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oldctx = sun3_get_context(); |
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for(addr = 0x00000000; addr < TASK_SIZE; addr += SUN3_PMEG_SIZE) { |
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for(ctx = 0; ctx < 8; ctx++) { |
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sun3_put_context(ctx); |
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sun3_put_segmap(addr, SUN3_INVALID_PMEG); |
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} |
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} |
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sun3_put_context(oldctx); |
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/* erase all of the userspace pmeg maps, we've clobbered them |
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all anyway */ |
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for(addr = 0; addr < SUN3_INVALID_PMEG; addr++) { |
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if(pmeg_alloc[addr] == 1) { |
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pmeg_alloc[addr] = 0; |
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pmeg_ctx[addr] = 0; |
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pmeg_vaddr[addr] = 0; |
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} |
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} |
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} |
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/* Clear user TLB entries within the context named in mm */ |
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static inline void flush_tlb_mm (struct mm_struct *mm) |
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{ |
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unsigned char oldctx; |
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unsigned char seg; |
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unsigned long i; |
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oldctx = sun3_get_context(); |
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sun3_put_context(mm->context); |
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for(i = 0; i < TASK_SIZE; i += SUN3_PMEG_SIZE) { |
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seg = sun3_get_segmap(i); |
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if(seg == SUN3_INVALID_PMEG) |
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continue; |
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sun3_put_segmap(i, SUN3_INVALID_PMEG); |
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pmeg_alloc[seg] = 0; |
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pmeg_ctx[seg] = 0; |
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pmeg_vaddr[seg] = 0; |
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} |
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sun3_put_context(oldctx); |
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} |
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/* Flush a single TLB page. In this case, we're limited to flushing a |
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single PMEG */ |
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static inline void flush_tlb_page (struct vm_area_struct *vma, |
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unsigned long addr) |
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{ |
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unsigned char oldctx; |
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unsigned char i; |
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oldctx = sun3_get_context(); |
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sun3_put_context(vma->vm_mm->context); |
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addr &= ~SUN3_PMEG_MASK; |
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if((i = sun3_get_segmap(addr)) != SUN3_INVALID_PMEG) |
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{ |
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pmeg_alloc[i] = 0; |
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pmeg_ctx[i] = 0; |
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pmeg_vaddr[i] = 0; |
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sun3_put_segmap (addr, SUN3_INVALID_PMEG); |
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} |
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sun3_put_context(oldctx); |
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} |
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/* Flush a range of pages from TLB. */ |
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static inline void flush_tlb_range (struct vm_area_struct *vma, |
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unsigned long start, unsigned long end) |
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{ |
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struct mm_struct *mm = vma->vm_mm; |
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unsigned char seg, oldctx; |
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start &= ~SUN3_PMEG_MASK; |
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oldctx = sun3_get_context(); |
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sun3_put_context(mm->context); |
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while(start < end) |
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{ |
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if((seg = sun3_get_segmap(start)) == SUN3_INVALID_PMEG) |
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goto next; |
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if(pmeg_ctx[seg] == mm->context) { |
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pmeg_alloc[seg] = 0; |
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pmeg_ctx[seg] = 0; |
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pmeg_vaddr[seg] = 0; |
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} |
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sun3_put_segmap(start, SUN3_INVALID_PMEG); |
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next: |
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start += SUN3_PMEG_SIZE; |
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} |
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} |
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static inline void flush_tlb_kernel_range(unsigned long start, unsigned long end) |
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{ |
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flush_tlb_all(); |
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} |
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/* Flush kernel page from TLB. */ |
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static inline void flush_tlb_kernel_page (unsigned long addr) |
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{ |
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sun3_put_segmap (addr & ~(SUN3_PMEG_SIZE - 1), SUN3_INVALID_PMEG); |
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} |
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#endif |
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#else /* !CONFIG_MMU */ |
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/* |
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* flush all user-space atc entries. |
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*/ |
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static inline void __flush_tlb(void) |
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{ |
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BUG(); |
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} |
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static inline void __flush_tlb_one(unsigned long addr) |
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{ |
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BUG(); |
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} |
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#define flush_tlb() __flush_tlb() |
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/* |
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* flush all atc entries (both kernel and user-space entries). |
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*/ |
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static inline void flush_tlb_all(void) |
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{ |
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BUG(); |
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} |
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static inline void flush_tlb_mm(struct mm_struct *mm) |
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{ |
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BUG(); |
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} |
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static inline void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr) |
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{ |
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BUG(); |
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} |
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static inline void flush_tlb_range(struct mm_struct *mm, |
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unsigned long start, unsigned long end) |
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{ |
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BUG(); |
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} |
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static inline void flush_tlb_kernel_page(unsigned long addr) |
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{ |
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BUG(); |
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} |
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#endif /* CONFIG_MMU */ |
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#endif /* _M68K_TLBFLUSH_H */
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