diff options
Diffstat (limited to 'include/asm-sh/mmu_context.h')
| -rw-r--r-- | include/asm-sh/mmu_context.h | 87 |
1 files changed, 24 insertions, 63 deletions
diff --git a/include/asm-sh/mmu_context.h b/include/asm-sh/mmu_context.h index 199662bb35c..fe58d00b250 100644 --- a/include/asm-sh/mmu_context.h +++ b/include/asm-sh/mmu_context.h @@ -1,13 +1,13 @@ /* * Copyright (C) 1999 Niibe Yutaka - * Copyright (C) 2003 - 2006 Paul Mundt + * Copyright (C) 2003 - 2007 Paul Mundt * * ASID handling idea taken from MIPS implementation. */ #ifndef __ASM_SH_MMU_CONTEXT_H #define __ASM_SH_MMU_CONTEXT_H -#ifdef __KERNEL__ +#ifdef __KERNEL__ #include <asm/cpu/mmu_context.h> #include <asm/tlbflush.h> #include <asm/uaccess.h> @@ -19,7 +19,6 @@ * (a) TLB cache version (or round, cycle whatever expression you like) * (b) ASID (Address Space IDentifier) */ - #define MMU_CONTEXT_ASID_MASK 0x000000ff #define MMU_CONTEXT_VERSION_MASK 0xffffff00 #define MMU_CONTEXT_FIRST_VERSION 0x00000100 @@ -28,10 +27,11 @@ /* ASID is 8-bit value, so it can't be 0x100 */ #define MMU_NO_ASID 0x100 -#define cpu_context(cpu, mm) ((mm)->context.id[cpu]) -#define cpu_asid(cpu, mm) (cpu_context((cpu), (mm)) & \ - MMU_CONTEXT_ASID_MASK) #define asid_cache(cpu) (cpu_data[cpu].asid_cache) +#define cpu_context(cpu, mm) ((mm)->context.id[cpu]) + +#define cpu_asid(cpu, mm) \ + (cpu_context((cpu), (mm)) & MMU_CONTEXT_ASID_MASK) /* * Virtual Page Number mask @@ -39,6 +39,12 @@ #define MMU_VPN_MASK 0xfffff000 #ifdef CONFIG_MMU +#if defined(CONFIG_SUPERH32) +#include "mmu_context_32.h" +#else +#include "mmu_context_64.h" +#endif + /* * Get MMU context if needed. */ @@ -59,6 +65,14 @@ static inline void get_mmu_context(struct mm_struct *mm, unsigned int cpu) */ flush_tlb_all(); +#ifdef CONFIG_SUPERH64 + /* + * The SH-5 cache uses the ASIDs, requiring both the I and D + * cache to be flushed when the ASID is exhausted. Weak. + */ + flush_cache_all(); +#endif + /* * Fix version; Note that we avoid version #0 * to distingush NO_CONTEXT. @@ -86,39 +100,6 @@ static inline int init_new_context(struct task_struct *tsk, } /* - * Destroy context related info for an mm_struct that is about - * to be put to rest. - */ -static inline void destroy_context(struct mm_struct *mm) -{ - /* Do nothing */ -} - -static inline void set_asid(unsigned long asid) -{ - unsigned long __dummy; - - __asm__ __volatile__ ("mov.l %2, %0\n\t" - "and %3, %0\n\t" - "or %1, %0\n\t" - "mov.l %0, %2" - : "=&r" (__dummy) - : "r" (asid), "m" (__m(MMU_PTEH)), - "r" (0xffffff00)); -} - -static inline unsigned long get_asid(void) -{ - unsigned long asid; - - __asm__ __volatile__ ("mov.l %1, %0" - : "=r" (asid) - : "m" (__m(MMU_PTEH))); - asid &= MMU_CONTEXT_ASID_MASK; - return asid; -} - -/* * After we have set current->mm to a new value, this activates * the context for the new mm so we see the new mappings. */ @@ -128,17 +109,6 @@ static inline void activate_context(struct mm_struct *mm, unsigned int cpu) set_asid(cpu_asid(cpu, mm)); } -/* MMU_TTB is used for optimizing the fault handling. */ -static inline void set_TTB(pgd_t *pgd) -{ - ctrl_outl((unsigned long)pgd, MMU_TTB); -} - -static inline pgd_t *get_TTB(void) -{ - return (pgd_t *)ctrl_inl(MMU_TTB); -} - static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, struct task_struct *tsk) @@ -153,17 +123,7 @@ static inline void switch_mm(struct mm_struct *prev, if (!cpu_test_and_set(cpu, next->cpu_vm_mask)) activate_context(next, cpu); } - -#define deactivate_mm(tsk,mm) do { } while (0) - -#define activate_mm(prev, next) \ - switch_mm((prev),(next),NULL) - -static inline void -enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk) -{ -} -#else /* !CONFIG_MMU */ +#else #define get_mmu_context(mm) do { } while (0) #define init_new_context(tsk,mm) (0) #define destroy_context(mm) do { } while (0) @@ -173,10 +133,11 @@ enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk) #define get_TTB() (0) #define activate_context(mm,cpu) do { } while (0) #define switch_mm(prev,next,tsk) do { } while (0) +#endif /* CONFIG_MMU */ + +#define activate_mm(prev, next) switch_mm((prev),(next),NULL) #define deactivate_mm(tsk,mm) do { } while (0) -#define activate_mm(prev,next) do { } while (0) #define enter_lazy_tlb(mm,tsk) do { } while (0) -#endif /* CONFIG_MMU */ #if defined(CONFIG_CPU_SH3) || defined(CONFIG_CPU_SH4) /* |