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