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@@ -1,5 +1,175 @@
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-#ifdef __uClinux__
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-#include "mmu_context_no.h"
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+#ifndef __M68K_MMU_CONTEXT_H
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+#define __M68K_MMU_CONTEXT_H
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+
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+#include <asm-generic/mm_hooks.h>
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+
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+static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
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+{
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+}
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+
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+#ifdef CONFIG_MMU
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+#ifndef CONFIG_SUN3
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+
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+#include <asm/setup.h>
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+#include <asm/page.h>
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+#include <asm/pgalloc.h>
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+
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+static inline int init_new_context(struct task_struct *tsk,
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+ struct mm_struct *mm)
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+{
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+ mm->context = virt_to_phys(mm->pgd);
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+ return 0;
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+}
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+
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+#define destroy_context(mm) do { } while(0)
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+
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+static inline void switch_mm_0230(struct mm_struct *mm)
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+{
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+ unsigned long crp[2] = {
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+ 0x80000000 | _PAGE_TABLE, mm->context
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+ };
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+ unsigned long tmp;
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+
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+ asm volatile (".chip 68030");
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+
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+ /* flush MC68030/MC68020 caches (they are virtually addressed) */
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+ asm volatile (
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+ "movec %%cacr,%0;"
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+ "orw %1,%0; "
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+ "movec %0,%%cacr"
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+ : "=d" (tmp) : "di" (FLUSH_I_AND_D));
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+
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+ /* Switch the root pointer. For a 030-only kernel,
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+ * avoid flushing the whole ATC, we only need to
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+ * flush the user entries. The 68851 does this by
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+ * itself. Avoid a runtime check here.
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+ */
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+ asm volatile (
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+#ifdef CPU_M68030_ONLY
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+ "pmovefd %0,%%crp; "
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+ "pflush #0,#4"
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#else
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-#include "mmu_context_mm.h"
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+ "pmove %0,%%crp"
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#endif
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+ : : "m" (crp[0]));
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+
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+ asm volatile (".chip 68k");
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+}
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+
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+static inline void switch_mm_0460(struct mm_struct *mm)
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+{
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+ asm volatile (".chip 68040");
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+
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+ /* flush address translation cache (user entries) */
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+ asm volatile ("pflushan");
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+
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+ /* switch the root pointer */
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+ asm volatile ("movec %0,%%urp" : : "r" (mm->context));
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+
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+ if (CPU_IS_060) {
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+ unsigned long tmp;
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+
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+ /* clear user entries in the branch cache */
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+ asm volatile (
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+ "movec %%cacr,%0; "
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+ "orl %1,%0; "
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+ "movec %0,%%cacr"
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+ : "=d" (tmp): "di" (0x00200000));
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+ }
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+
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+ asm volatile (".chip 68k");
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+}
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+
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+static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, struct task_struct *tsk)
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+{
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+ if (prev != next) {
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+ if (CPU_IS_020_OR_030)
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+ switch_mm_0230(next);
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+ else
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+ switch_mm_0460(next);
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+ }
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+}
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+
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+#define deactivate_mm(tsk,mm) do { } while (0)
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+
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+static inline void activate_mm(struct mm_struct *prev_mm,
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+ struct mm_struct *next_mm)
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+{
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+ next_mm->context = virt_to_phys(next_mm->pgd);
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+
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+ if (CPU_IS_020_OR_030)
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+ switch_mm_0230(next_mm);
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+ else
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+ switch_mm_0460(next_mm);
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+}
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+
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+#else /* CONFIG_SUN3 */
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+#include <asm/sun3mmu.h>
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+#include <linux/sched.h>
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+
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+extern unsigned long get_free_context(struct mm_struct *mm);
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+extern void clear_context(unsigned long context);
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+
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+/* set the context for a new task to unmapped */
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+static inline int init_new_context(struct task_struct *tsk, struct mm_struct *mm)
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+{
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+ mm->context = SUN3_INVALID_CONTEXT;
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+ return 0;
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+}
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+
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+/* find the context given to this process, and if it hasn't already
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+ got one, go get one for it. */
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+static inline void get_mmu_context(struct mm_struct *mm)
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+{
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+ if(mm->context == SUN3_INVALID_CONTEXT)
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+ mm->context = get_free_context(mm);
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+}
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+
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+/* flush context if allocated... */
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+static inline void destroy_context(struct mm_struct *mm)
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+{
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+ if(mm->context != SUN3_INVALID_CONTEXT)
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+ clear_context(mm->context);
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+}
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+
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+static inline void activate_context(struct mm_struct *mm)
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+{
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+ get_mmu_context(mm);
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+ sun3_put_context(mm->context);
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+}
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+
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+static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, struct task_struct *tsk)
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+{
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+ activate_context(tsk->mm);
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+}
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+
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+#define deactivate_mm(tsk,mm) do { } while (0)
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+
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+static inline void activate_mm(struct mm_struct *prev_mm,
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+ struct mm_struct *next_mm)
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+{
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+ activate_context(next_mm);
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+}
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+
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+#endif
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+#else /* !CONFIG_MMU */
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+
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+static inline int init_new_context(struct task_struct *tsk, struct mm_struct *mm)
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+{
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+ return 0;
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+}
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+
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+
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+static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, struct task_struct *tsk)
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+{
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+}
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+
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+#define destroy_context(mm) do { } while (0)
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+#define deactivate_mm(tsk,mm) do { } while (0)
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+
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+static inline void activate_mm(struct mm_struct *prev_mm, struct mm_struct *next_mm)
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+{
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+}
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+
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+#endif /* CONFIG_MMU */
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+#endif /* __M68K_MMU_CONTEXT_H */
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Greg Ungerer