X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=include%2Fasm-xtensa%2Ftlbflush.h;h=46d240074f747aa622711b35d0b130cedba6b812;hb=c6de002617c199f80f9a2a713dffc263bdc69b81;hp=23bfe9db45f5de0dd4e664566b98d4ab91a06214;hpb=5028770a42e7bc4d15791a44c28f0ad539323807;p=linux-2.6 diff --git a/include/asm-xtensa/tlbflush.h b/include/asm-xtensa/tlbflush.h index 23bfe9db45..46d240074f 100644 --- a/include/asm-xtensa/tlbflush.h +++ b/include/asm-xtensa/tlbflush.h @@ -11,12 +11,20 @@ #ifndef _XTENSA_TLBFLUSH_H #define _XTENSA_TLBFLUSH_H -#define DEBUG_TLB - #ifdef __KERNEL__ -#include #include +#include + +#define DTLB_WAY_PGD 7 + +#define ITLB_ARF_WAYS 4 +#define DTLB_ARF_WAYS 4 + +#define ITLB_HIT_BIT 3 +#define DTLB_HIT_BIT 4 + +#ifndef __ASSEMBLY__ /* TLB flushing: * @@ -33,44 +41,28 @@ extern void flush_tlb_range(struct vm_area_struct*,unsigned long,unsigned long); #define flush_tlb_kernel_range(start,end) flush_tlb_all() - -/* This is calld in munmap when we have freed up some page-table pages. - * We don't need to do anything here, there's nothing special about our - * page-table pages. - */ - -extern inline void flush_tlb_pgtables(struct mm_struct *mm, - unsigned long start, unsigned long end) -{ -} - /* TLB operations. */ -#define ITLB_WAYS_LOG2 XCHAL_ITLB_WAY_BITS -#define DTLB_WAYS_LOG2 XCHAL_DTLB_WAY_BITS -#define ITLB_PROBE_SUCCESS (1 << ITLB_WAYS_LOG2) -#define DTLB_PROBE_SUCCESS (1 << DTLB_WAYS_LOG2) - -extern inline unsigned long itlb_probe(unsigned long addr) +static inline unsigned long itlb_probe(unsigned long addr) { unsigned long tmp; __asm__ __volatile__("pitlb %0, %1\n\t" : "=a" (tmp) : "a" (addr)); return tmp; } -extern inline unsigned long dtlb_probe(unsigned long addr) +static inline unsigned long dtlb_probe(unsigned long addr) { unsigned long tmp; __asm__ __volatile__("pdtlb %0, %1\n\t" : "=a" (tmp) : "a" (addr)); return tmp; } -extern inline void invalidate_itlb_entry (unsigned long probe) +static inline void invalidate_itlb_entry (unsigned long probe) { __asm__ __volatile__("iitlb %0; isync\n\t" : : "a" (probe)); } -extern inline void invalidate_dtlb_entry (unsigned long probe) +static inline void invalidate_dtlb_entry (unsigned long probe) { __asm__ __volatile__("idtlb %0; dsync\n\t" : : "a" (probe)); } @@ -80,80 +72,81 @@ extern inline void invalidate_dtlb_entry (unsigned long probe) * caller must follow up with an 'isync', which can be relatively * expensive on some Xtensa implementations. */ -extern inline void invalidate_itlb_entry_no_isync (unsigned entry) +static inline void invalidate_itlb_entry_no_isync (unsigned entry) { /* Caller must follow up with 'isync'. */ __asm__ __volatile__ ("iitlb %0\n" : : "a" (entry) ); } -extern inline void invalidate_dtlb_entry_no_isync (unsigned entry) +static inline void invalidate_dtlb_entry_no_isync (unsigned entry) { /* Caller must follow up with 'isync'. */ __asm__ __volatile__ ("idtlb %0\n" : : "a" (entry) ); } -extern inline void set_itlbcfg_register (unsigned long val) +static inline void set_itlbcfg_register (unsigned long val) { __asm__ __volatile__("wsr %0, "__stringify(ITLBCFG)"\n\t" "isync\n\t" : : "a" (val)); } -extern inline void set_dtlbcfg_register (unsigned long val) +static inline void set_dtlbcfg_register (unsigned long val) { __asm__ __volatile__("wsr %0, "__stringify(DTLBCFG)"; dsync\n\t" : : "a" (val)); } -extern inline void set_ptevaddr_register (unsigned long val) +static inline void set_ptevaddr_register (unsigned long val) { __asm__ __volatile__(" wsr %0, "__stringify(PTEVADDR)"; isync\n" : : "a" (val)); } -extern inline unsigned long read_ptevaddr_register (void) +static inline unsigned long read_ptevaddr_register (void) { unsigned long tmp; __asm__ __volatile__("rsr %0, "__stringify(PTEVADDR)"\n\t" : "=a" (tmp)); return tmp; } -extern inline void write_dtlb_entry (pte_t entry, int way) +static inline void write_dtlb_entry (pte_t entry, int way) { __asm__ __volatile__("wdtlb %1, %0; dsync\n\t" : : "r" (way), "r" (entry) ); } -extern inline void write_itlb_entry (pte_t entry, int way) +static inline void write_itlb_entry (pte_t entry, int way) { __asm__ __volatile__("witlb %1, %0; isync\n\t" : : "r" (way), "r" (entry) ); } -extern inline void invalidate_page_directory (void) +static inline void invalidate_page_directory (void) { - invalidate_dtlb_entry (DTLB_WAY_PGTABLE); + invalidate_dtlb_entry (DTLB_WAY_PGD); + invalidate_dtlb_entry (DTLB_WAY_PGD+1); + invalidate_dtlb_entry (DTLB_WAY_PGD+2); } -extern inline void invalidate_itlb_mapping (unsigned address) +static inline void invalidate_itlb_mapping (unsigned address) { unsigned long tlb_entry; - while ((tlb_entry = itlb_probe (address)) & ITLB_PROBE_SUCCESS) - invalidate_itlb_entry (tlb_entry); + if (((tlb_entry = itlb_probe(address)) & (1 << ITLB_HIT_BIT)) != 0) + invalidate_itlb_entry(tlb_entry); } -extern inline void invalidate_dtlb_mapping (unsigned address) +static inline void invalidate_dtlb_mapping (unsigned address) { unsigned long tlb_entry; - while ((tlb_entry = dtlb_probe (address)) & DTLB_PROBE_SUCCESS) - invalidate_dtlb_entry (tlb_entry); + if (((tlb_entry = dtlb_probe(address)) & (1 << DTLB_HIT_BIT)) != 0) + invalidate_dtlb_entry(tlb_entry); } #define check_pgt_cache() do { } while (0) -#ifdef DEBUG_TLB - -/* DO NOT USE THESE FUNCTIONS. These instructions aren't part of the Xtensa +/* + * DO NOT USE THESE FUNCTIONS. These instructions aren't part of the Xtensa * ISA and exist only for test purposes.. * You may find it helpful for MMU debugging, however. * @@ -165,36 +158,34 @@ extern inline void invalidate_dtlb_mapping (unsigned address) * as[07..00] contain the asid */ -extern inline unsigned long read_dtlb_virtual (int way) +static inline unsigned long read_dtlb_virtual (int way) { unsigned long tmp; __asm__ __volatile__("rdtlb0 %0, %1\n\t" : "=a" (tmp), "+a" (way)); return tmp; } -extern inline unsigned long read_dtlb_translation (int way) +static inline unsigned long read_dtlb_translation (int way) { unsigned long tmp; __asm__ __volatile__("rdtlb1 %0, %1\n\t" : "=a" (tmp), "+a" (way)); return tmp; } -extern inline unsigned long read_itlb_virtual (int way) +static inline unsigned long read_itlb_virtual (int way) { unsigned long tmp; __asm__ __volatile__("ritlb0 %0, %1\n\t" : "=a" (tmp), "+a" (way)); return tmp; } -extern inline unsigned long read_itlb_translation (int way) +static inline unsigned long read_itlb_translation (int way) { unsigned long tmp; __asm__ __volatile__("ritlb1 %0, %1\n\t" : "=a" (tmp), "+a" (way)); return tmp; } -#endif /* DEBUG_TLB */ - - +#endif /* __ASSEMBLY__ */ #endif /* __KERNEL__ */ -#endif /* _XTENSA_PGALLOC_H */ +#endif /* _XTENSA_TLBFLUSH_H */