m68k: merge the mmu and non-mmu versions of mmu_context.h

Simple merge of the mmu and non-mmu versions of mmu_context.h

Signed-off-by: Greg Ungerer <gerg@uclinux.org>

3 files changed, 173 insertions, 190 deletions

diff --git a/arch/m68k/include/asm/mmu_context.h b/arch/m68k/include/asm/mmu_context.h
index b440928..7d4341e 100644
--- a/arch/m68k/include/asm/mmu_context.h
+++ b/arch/m68k/include/asm/mmu_context.h
@@ -1,5 +1,175 @@
-#ifdef __uClinux__
-#include "mmu_context_no.h"
+#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)
+{
+}
+
+#ifdef CONFIG_MMU
+#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
-#include "mmu_context_mm.h"
+		"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
+#else /* !CONFIG_MMU */
+
+static inline int init_new_context(struct task_struct *tsk, struct mm_struct *mm)
+{
+	return 0;
+}
+
+
+static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, struct task_struct *tsk)
+{
+}
+
+#define destroy_context(mm)	do { } while (0)
+#define deactivate_mm(tsk,mm)	do { } while (0)
+
+static inline void activate_mm(struct mm_struct *prev_mm, struct mm_struct *next_mm)
+{
+}
+
+#endif /* CONFIG_MMU */
+#endif /* __M68K_MMU_CONTEXT_H */
diff --git a/arch/m68k/include/asm/mmu_context_mm.h b/arch/m68k/include/asm/mmu_context_mm.h
deleted file mode 100644
index 894dacb..0000000
--- a/arch/m68k/include/asm/mmu_context_mm.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
diff --git a/arch/m68k/include/asm/mmu_context_no.h b/arch/m68k/include/asm/mmu_context_no.h
deleted file mode 100644
index 9ccee42..0000000
--- a/arch/m68k/include/asm/mmu_context_no.h
+++ /dev/null
@@ -1,33 +0,0 @@
-#ifndef __M68KNOMMU_MMU_CONTEXT_H
-#define __M68KNOMMU_MMU_CONTEXT_H
-
-#include <asm/setup.h>
-#include <asm/page.h>
-#include <asm/pgalloc.h>
-#include <asm-generic/mm_hooks.h>
-
-static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
-{
-}
-
-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(struct mm_struct *prev, struct mm_struct *next, struct task_struct *tsk)
-{
-}
-
-#define deactivate_mm(tsk,mm)	do { } while (0)
-
-static inline void activate_mm(struct mm_struct *prev_mm,
-			       struct mm_struct *next_mm)
-{
-}
-
-#endif