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Diffstat (limited to 'include/asm-avr32/mmu_context.h')
-rw-r--r--include/asm-avr32/mmu_context.h148
1 files changed, 0 insertions, 148 deletions
diff --git a/include/asm-avr32/mmu_context.h b/include/asm-avr32/mmu_context.h
deleted file mode 100644
index 27ff2340710..00000000000
--- a/include/asm-avr32/mmu_context.h
+++ /dev/null
@@ -1,148 +0,0 @@
-/*
- * Copyright (C) 2004-2006 Atmel Corporation
- *
- * ASID handling taken from SH implementation.
- * Copyright (C) 1999 Niibe Yutaka
- * Copyright (C) 2003 Paul Mundt
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-#ifndef __ASM_AVR32_MMU_CONTEXT_H
-#define __ASM_AVR32_MMU_CONTEXT_H
-
-#include <asm/tlbflush.h>
-#include <asm/sysreg.h>
-#include <asm-generic/mm_hooks.h>
-
-/*
- * The MMU "context" consists of two things:
- * (a) TLB cache version
- * (b) ASID (Address Space IDentifier)
- */
-#define MMU_CONTEXT_ASID_MASK 0x000000ff
-#define MMU_CONTEXT_VERSION_MASK 0xffffff00
-#define MMU_CONTEXT_FIRST_VERSION 0x00000100
-#define NO_CONTEXT 0
-
-#define MMU_NO_ASID 0x100
-
-/* Virtual Page Number mask */
-#define MMU_VPN_MASK 0xfffff000
-
-/* Cache of MMU context last used */
-extern unsigned long mmu_context_cache;
-
-/*
- * Get MMU context if needed
- */
-static inline void
-get_mmu_context(struct mm_struct *mm)
-{
- unsigned long mc = mmu_context_cache;
-
- if (((mm->context ^ mc) & MMU_CONTEXT_VERSION_MASK) == 0)
- /* It's up to date, do nothing */
- return;
-
- /* It's old, we need to get new context with new version */
- mc = ++mmu_context_cache;
- if (!(mc & MMU_CONTEXT_ASID_MASK)) {
- /*
- * We have exhausted all ASIDs of this version.
- * Flush the TLB and start new cycle.
- */
- flush_tlb_all();
- /*
- * Fix version. Note that we avoid version #0
- * to distinguish NO_CONTEXT.
- */
- if (!mc)
- mmu_context_cache = mc = MMU_CONTEXT_FIRST_VERSION;
- }
- mm->context = mc;
-}
-
-/*
- * 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)
-{
- mm->context = NO_CONTEXT;
- return 0;
-}
-
-/*
- * 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)
-{
- /* XXX: We're destroying TLBEHI[8:31] */
- sysreg_write(TLBEHI, asid & MMU_CONTEXT_ASID_MASK);
- cpu_sync_pipeline();
-}
-
-static inline unsigned long get_asid(void)
-{
- unsigned long asid;
-
- asid = sysreg_read(TLBEHI);
- return asid & MMU_CONTEXT_ASID_MASK;
-}
-
-static inline void activate_context(struct mm_struct *mm)
-{
- get_mmu_context(mm);
- set_asid(mm->context & MMU_CONTEXT_ASID_MASK);
-}
-
-static inline void switch_mm(struct mm_struct *prev,
- struct mm_struct *next,
- struct task_struct *tsk)
-{
- if (likely(prev != next)) {
- unsigned long __pgdir = (unsigned long)next->pgd;
-
- sysreg_write(PTBR, __pgdir);
- activate_context(next);
- }
-}
-
-#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)
-{
-}
-
-
-static inline void enable_mmu(void)
-{
- sysreg_write(MMUCR, (SYSREG_BIT(MMUCR_S)
- | SYSREG_BIT(E)
- | SYSREG_BIT(MMUCR_I)));
- nop(); nop(); nop(); nop(); nop(); nop(); nop(); nop();
-
- if (mmu_context_cache == NO_CONTEXT)
- mmu_context_cache = MMU_CONTEXT_FIRST_VERSION;
-
- set_asid(mmu_context_cache & MMU_CONTEXT_ASID_MASK);
-}
-
-static inline void disable_mmu(void)
-{
- sysreg_write(MMUCR, SYSREG_BIT(MMUCR_S));
-}
-
-#endif /* __ASM_AVR32_MMU_CONTEXT_H */