diff options
Diffstat (limited to 'include/asm-m68k/mmu_context.h')
-rw-r--r-- | include/asm-m68k/mmu_context.h | 154 |
1 files changed, 0 insertions, 154 deletions
diff --git a/include/asm-m68k/mmu_context.h b/include/asm-m68k/mmu_context.h deleted file mode 100644 index 894dacb..0000000 --- a/include/asm-m68k/mmu_context.h +++ /dev/null @@ -1,154 +0,0 @@ -#ifndef __M68K_MMU_CONTEXT_H -#define __M68K_MMU_CONTEXT_H - -#include <asm-generic/mm_hooks.h> - -static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk) -{ -} - -#ifndef CONFIG_SUN3 - -#include <asm/setup.h> -#include <asm/page.h> -#include <asm/pgalloc.h> - -static inline int init_new_context(struct task_struct *tsk, - struct mm_struct *mm) -{ - mm->context = virt_to_phys(mm->pgd); - return 0; -} - -#define destroy_context(mm) do { } while(0) - -static inline void switch_mm_0230(struct mm_struct *mm) -{ - unsigned long crp[2] = { - 0x80000000 | _PAGE_TABLE, mm->context - }; - unsigned long tmp; - - asm volatile (".chip 68030"); - - /* flush MC68030/MC68020 caches (they are virtually addressed) */ - asm volatile ( - "movec %%cacr,%0;" - "orw %1,%0; " - "movec %0,%%cacr" - : "=d" (tmp) : "di" (FLUSH_I_AND_D)); - - /* Switch the root pointer. For a 030-only kernel, - * avoid flushing the whole ATC, we only need to - * flush the user entries. The 68851 does this by - * itself. Avoid a runtime check here. - */ - asm volatile ( -#ifdef CPU_M68030_ONLY - "pmovefd %0,%%crp; " - "pflush #0,#4" -#else - "pmove %0,%%crp" -#endif - : : "m" (crp[0])); - - asm volatile (".chip 68k"); -} - -static inline void switch_mm_0460(struct mm_struct *mm) -{ - asm volatile (".chip 68040"); - - /* flush address translation cache (user entries) */ - asm volatile ("pflushan"); - - /* switch the root pointer */ - asm volatile ("movec %0,%%urp" : : "r" (mm->context)); - - if (CPU_IS_060) { - unsigned long tmp; - - /* clear user entries in the branch cache */ - asm volatile ( - "movec %%cacr,%0; " - "orl %1,%0; " - "movec %0,%%cacr" - : "=d" (tmp): "di" (0x00200000)); - } - - asm volatile (".chip 68k"); -} - -static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, struct task_struct *tsk) -{ - if (prev != next) { - if (CPU_IS_020_OR_030) - switch_mm_0230(next); - else - switch_mm_0460(next); - } -} - -#define deactivate_mm(tsk,mm) do { } while (0) - -static inline void activate_mm(struct mm_struct *prev_mm, - struct mm_struct *next_mm) -{ - next_mm->context = virt_to_phys(next_mm->pgd); - - if (CPU_IS_020_OR_030) - switch_mm_0230(next_mm); - else - switch_mm_0460(next_mm); -} - -#else /* CONFIG_SUN3 */ -#include <asm/sun3mmu.h> -#include <linux/sched.h> - -extern unsigned long get_free_context(struct mm_struct *mm); -extern void clear_context(unsigned long context); - -/* set the context for a new task to unmapped */ -static inline int init_new_context(struct task_struct *tsk, struct mm_struct *mm) -{ - mm->context = SUN3_INVALID_CONTEXT; - return 0; -} - -/* find the context given to this process, and if it hasn't already - got one, go get one for it. */ -static inline void get_mmu_context(struct mm_struct *mm) -{ - if(mm->context == SUN3_INVALID_CONTEXT) - mm->context = get_free_context(mm); -} - -/* flush context if allocated... */ -static inline void destroy_context(struct mm_struct *mm) -{ - if(mm->context != SUN3_INVALID_CONTEXT) - clear_context(mm->context); -} - -static inline void activate_context(struct mm_struct *mm) -{ - get_mmu_context(mm); - sun3_put_context(mm->context); -} - -static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, struct task_struct *tsk) -{ - activate_context(tsk->mm); -} - -#define deactivate_mm(tsk,mm) do { } while (0) - -static inline void activate_mm(struct mm_struct *prev_mm, - struct mm_struct *next_mm) -{ - activate_context(next_mm); -} - -#endif -#endif |