diff options
Diffstat (limited to 'include/asm-m32r/mmu_context.h')
| -rw-r--r-- | include/asm-m32r/mmu_context.h | 164 |
1 files changed, 0 insertions, 164 deletions
diff --git a/include/asm-m32r/mmu_context.h b/include/asm-m32r/mmu_context.h deleted file mode 100644 index 91909e5..0000000 --- a/include/asm-m32r/mmu_context.h +++ /dev/null @@ -1,164 +0,0 @@ -#ifndef _ASM_M32R_MMU_CONTEXT_H -#define _ASM_M32R_MMU_CONTEXT_H -#ifdef __KERNEL__ - -#include <asm/m32r.h> - -#define MMU_CONTEXT_ASID_MASK (0x000000FF) -#define MMU_CONTEXT_VERSION_MASK (0xFFFFFF00) -#define MMU_CONTEXT_FIRST_VERSION (0x00000100) -#define NO_CONTEXT (0x00000000) - -#ifndef __ASSEMBLY__ - -#include <asm/atomic.h> -#include <asm/pgalloc.h> -#include <asm/mmu.h> -#include <asm/tlbflush.h> -#include <asm-generic/mm_hooks.h> - -/* - * Cache of MMU context last used. - */ -#ifndef CONFIG_SMP -extern unsigned long mmu_context_cache_dat; -#define mmu_context_cache mmu_context_cache_dat -#define mm_context(mm) mm->context -#else /* not CONFIG_SMP */ -extern unsigned long mmu_context_cache_dat[]; -#define mmu_context_cache mmu_context_cache_dat[smp_processor_id()] -#define mm_context(mm) mm->context[smp_processor_id()] -#endif /* not CONFIG_SMP */ - -#define set_tlb_tag(entry, tag) (*entry = (tag & PAGE_MASK)|get_asid()) -#define set_tlb_data(entry, data) (*entry = (data | _PAGE_PRESENT)) - -#ifdef CONFIG_MMU -#define enter_lazy_tlb(mm, tsk) do { } while (0) - -static inline void get_new_mmu_context(struct mm_struct *mm) -{ - unsigned long mc = ++mmu_context_cache; - - if (!(mc & MMU_CONTEXT_ASID_MASK)) { - /* We exhaust ASID of this version. - Flush all TLB and start new cycle. */ - local_flush_tlb_all(); - /* Fix version if needed. - Note that we avoid version #0 to distingush NO_CONTEXT. */ - if (!mc) - mmu_context_cache = mc = MMU_CONTEXT_FIRST_VERSION; - } - mm_context(mm) = mc; -} - -/* - * Get MMU context if needed. - */ -static inline void get_mmu_context(struct mm_struct *mm) -{ - if (mm) { - unsigned long mc = mmu_context_cache; - - /* Check if we have old version of context. - If it's old, we need to get new context with new version. */ - if ((mm_context(mm) ^ mc) & MMU_CONTEXT_VERSION_MASK) - get_new_mmu_context(mm); - } -} - -/* - * Initialize the context related info for a new mm_struct - * instance. - */ -static inline int init_new_context(struct task_struct *tsk, - struct mm_struct *mm) -{ -#ifndef CONFIG_SMP - mm->context = NO_CONTEXT; -#else /* CONFIG_SMP */ - int num_cpus = num_online_cpus(); - int i; - - for (i = 0 ; i < num_cpus ; i++) - mm->context[i] = NO_CONTEXT; -#endif /* CONFIG_SMP */ - - return 0; -} - -/* - * Destroy context related info for an mm_struct that is about - * to be put to rest. - */ -#define destroy_context(mm) do { } while (0) - -static inline void set_asid(unsigned long asid) -{ - *(volatile unsigned long *)MASID = (asid & MMU_CONTEXT_ASID_MASK); -} - -static inline unsigned long get_asid(void) -{ - unsigned long asid; - - asid = *(volatile long *)MASID; - 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. - */ -static inline void activate_context(struct mm_struct *mm) -{ - get_mmu_context(mm); - set_asid(mm_context(mm) & MMU_CONTEXT_ASID_MASK); -} - -static inline void switch_mm(struct mm_struct *prev, - struct mm_struct *next, struct task_struct *tsk) -{ -#ifdef CONFIG_SMP - int cpu = smp_processor_id(); -#endif /* CONFIG_SMP */ - - if (prev != next) { -#ifdef CONFIG_SMP - cpu_set(cpu, next->cpu_vm_mask); -#endif /* CONFIG_SMP */ - /* Set MPTB = next->pgd */ - *(volatile unsigned long *)MPTB = (unsigned long)next->pgd; - activate_context(next); - } -#ifdef CONFIG_SMP - else - if (!cpu_test_and_set(cpu, next->cpu_vm_mask)) - activate_context(next); -#endif /* CONFIG_SMP */ -} - -#define deactivate_mm(tsk, mm) do { } while (0) - -#define activate_mm(prev, next) \ - switch_mm((prev), (next), NULL) - -#else /* not CONFIG_MMU */ -#define get_mmu_context(mm) do { } while (0) -#define init_new_context(tsk,mm) (0) -#define destroy_context(mm) do { } while (0) -#define set_asid(asid) do { } while (0) -#define get_asid() (0) -#define activate_context(mm) do { } while (0) -#define switch_mm(prev,next,tsk) do { } while (0) -#define deactivate_mm(mm,tsk) do { } while (0) -#define activate_mm(prev,next) do { } while (0) -#define enter_lazy_tlb(mm,tsk) do { } while (0) -#endif /* not CONFIG_MMU */ - -#endif /* not __ASSEMBLY__ */ - -#endif /* __KERNEL__ */ -#endif /* _ASM_M32R_MMU_CONTEXT_H */ |
