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m68k: merge the mmu and non-mmu versions of tlbflush.h
Simple merge of the mmu and non-mmu versions of tlbflush.h Signed-off-by: Greg Ungerer <gerg@uclinux.org>
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Greg Ungerer
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Mar 24, 2009
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,5 +1,267 @@ | ||
| #ifdef __uClinux__ | ||
| #include "tlbflush_no.h" | ||
| #ifndef _M68K_TLBFLUSH_H | ||
| #define _M68K_TLBFLUSH_H | ||
|
|
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| #ifdef CONFIG_MMU | ||
| #ifndef CONFIG_SUN3 | ||
|
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||
| #include <asm/current.h> | ||
|
|
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| 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 if (CPU_IS_020_OR_030) | ||
| __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 if (CPU_IS_020_OR_030) | ||
| __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 if (CPU_IS_020_OR_030) | ||
| __asm__ __volatile__("pflush #0,#4,(%0)" : : "a" (addr)); | ||
| } | ||
|
|
||
| #define flush_tlb() __flush_tlb() | ||
|
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| /* | ||
| * 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 if (CPU_IS_020_OR_030) | ||
| __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(); | ||
| } | ||
|
|
||
| #else | ||
| #include "tlbflush_mm.h" | ||
|
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|
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| /* 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; | ||
|
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||
| 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); | ||
| } | ||
| } | ||
|
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||
| 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; | ||
| } | ||
| } | ||
|
|
||
| } | ||
|
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| /* 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); | ||
|
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||
| for(i = 0; i < TASK_SIZE; i += SUN3_PMEG_SIZE) { | ||
| seg = sun3_get_segmap(i); | ||
| if(seg == SUN3_INVALID_PMEG) | ||
| continue; | ||
|
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||
| sun3_put_segmap(i, SUN3_INVALID_PMEG); | ||
| pmeg_alloc[seg] = 0; | ||
| pmeg_ctx[seg] = 0; | ||
| pmeg_vaddr[seg] = 0; | ||
| } | ||
|
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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 | ||
| single PMEG */ | ||
| static inline void flush_tlb_page (struct vm_area_struct *vma, | ||
| unsigned long addr) | ||
| { | ||
| unsigned char oldctx; | ||
| unsigned char i; | ||
|
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||
| 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. */ | ||
|
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||
| 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; | ||
|
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| start &= ~SUN3_PMEG_MASK; | ||
|
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| oldctx = sun3_get_context(); | ||
| sun3_put_context(mm->context); | ||
|
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| 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; | ||
| } | ||
| } | ||
|
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||
| static inline void flush_tlb_kernel_range(unsigned long start, unsigned long end) | ||
| { | ||
| flush_tlb_all(); | ||
| } | ||
|
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||
| /* 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); | ||
| } | ||
|
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||
| #endif | ||
|
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| #else /* !CONFIG_MMU */ | ||
|
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||
| /* | ||
| * flush all user-space atc entries. | ||
| */ | ||
| static inline void __flush_tlb(void) | ||
| { | ||
| BUG(); | ||
| } | ||
|
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| static inline void __flush_tlb_one(unsigned long addr) | ||
| { | ||
| BUG(); | ||
| } | ||
|
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| #define flush_tlb() __flush_tlb() | ||
|
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| /* | ||
| * flush all atc entries (both kernel and user-space entries). | ||
| */ | ||
| static inline void flush_tlb_all(void) | ||
| { | ||
| BUG(); | ||
| } | ||
|
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| static inline void flush_tlb_mm(struct mm_struct *mm) | ||
| { | ||
| BUG(); | ||
| } | ||
|
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| static inline void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr) | ||
| { | ||
| BUG(); | ||
| } | ||
|
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| static inline void flush_tlb_range(struct mm_struct *mm, | ||
| unsigned long start, unsigned long end) | ||
| { | ||
| BUG(); | ||
| } | ||
|
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| static inline void flush_tlb_kernel_page(unsigned long addr) | ||
| { | ||
| BUG(); | ||
| } | ||
|
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| #endif /* CONFIG_MMU */ | ||
|
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||
| #endif /* _M68K_TLBFLUSH_H */ |
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