Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=cdcc970829e81da3445346cb71b2ea264c9952b9
Commit:     cdcc970829e81da3445346cb71b2ea264c9952b9
Parent:     9085fa1255fc16bf0dbd217e9f4cdccf16f064d3
Author:     Paul Mundt <[EMAIL PROTECTED]>
AuthorDate: Fri Nov 9 16:37:18 2007 +0900
Committer:  Paul Mundt <[EMAIL PROTECTED]>
CommitDate: Mon Jan 28 13:18:41 2008 +0900

    sh: Move in the SH-5 mmu_context headers.
    
    Signed-off-by: Paul Mundt <[EMAIL PROTECTED]>
---
 include/asm-sh/cpu-sh5/mmu_context.h |   27 +++++
 include/asm-sh/mmu_context.h         |   87 ++++----------
 include/asm-sh/mmu_context_32.h      |   47 ++++++++
 include/asm-sh/mmu_context_64.h      |   75 ++++++++++++
 include/asm-sh64/mmu_context.h       |  208 ----------------------------------
 5 files changed, 173 insertions(+), 271 deletions(-)

diff --git a/include/asm-sh/cpu-sh5/mmu_context.h 
b/include/asm-sh/cpu-sh5/mmu_context.h
new file mode 100644
index 0000000..df857fc
--- /dev/null
+++ b/include/asm-sh/cpu-sh5/mmu_context.h
@@ -0,0 +1,27 @@
+#ifndef __ASM_SH_CPU_SH5_MMU_CONTEXT_H
+#define __ASM_SH_CPU_SH5_MMU_CONTEXT_H
+
+/* Common defines */
+#define TLB_STEP       0x00000010
+#define TLB_PTEH       0x00000000
+#define TLB_PTEL       0x00000008
+
+/* PTEH defines */
+#define PTEH_ASID_SHIFT        2
+#define PTEH_VALID     0x0000000000000001
+#define PTEH_SHARED    0x0000000000000002
+#define PTEH_MATCH_ASID        0x00000000000003ff
+
+#ifndef __ASSEMBLY__
+/* This has to be a common function because the next location to fill
+ * information is shared. */
+extern void __do_tlb_refill(unsigned long address, unsigned long long 
is_text_not_data, pte_t *pte);
+
+/* Profiling counter. */
+#ifdef CONFIG_SH64_PROC_TLB
+extern unsigned long long calls_to_do_fast_page_fault;
+#endif
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* __ASM_SH_CPU_SH5_MMU_CONTEXT_H */
diff --git a/include/asm-sh/mmu_context.h b/include/asm-sh/mmu_context.h
index 199662b..fe58d00 100644
--- a/include/asm-sh/mmu_context.h
+++ b/include/asm-sh/mmu_context.h
@@ -1,13 +1,13 @@
 /*
  * Copyright (C) 1999 Niibe Yutaka
- * Copyright (C) 2003 - 2006 Paul Mundt
+ * Copyright (C) 2003 - 2007 Paul Mundt
  *
  * ASID handling idea taken from MIPS implementation.
  */
 #ifndef __ASM_SH_MMU_CONTEXT_H
 #define __ASM_SH_MMU_CONTEXT_H
-#ifdef __KERNEL__
 
+#ifdef __KERNEL__
 #include <asm/cpu/mmu_context.h>
 #include <asm/tlbflush.h>
 #include <asm/uaccess.h>
@@ -19,7 +19,6 @@
  *    (a) TLB cache version (or round, cycle whatever expression you like)
  *    (b) ASID (Address Space IDentifier)
  */
-
 #define MMU_CONTEXT_ASID_MASK          0x000000ff
 #define MMU_CONTEXT_VERSION_MASK       0xffffff00
 #define MMU_CONTEXT_FIRST_VERSION      0x00000100
@@ -28,10 +27,11 @@
 /* ASID is 8-bit value, so it can't be 0x100 */
 #define MMU_NO_ASID                    0x100
 
-#define cpu_context(cpu, mm)   ((mm)->context.id[cpu])
-#define cpu_asid(cpu, mm)      (cpu_context((cpu), (mm)) & \
-                                MMU_CONTEXT_ASID_MASK)
 #define asid_cache(cpu)                (cpu_data[cpu].asid_cache)
+#define cpu_context(cpu, mm)   ((mm)->context.id[cpu])
+
+#define cpu_asid(cpu, mm)      \
+       (cpu_context((cpu), (mm)) & MMU_CONTEXT_ASID_MASK)
 
 /*
  * Virtual Page Number mask
@@ -39,6 +39,12 @@
 #define MMU_VPN_MASK   0xfffff000
 
 #ifdef CONFIG_MMU
+#if defined(CONFIG_SUPERH32)
+#include "mmu_context_32.h"
+#else
+#include "mmu_context_64.h"
+#endif
+
 /*
  * Get MMU context if needed.
  */
@@ -59,6 +65,14 @@ static inline void get_mmu_context(struct mm_struct *mm, 
unsigned int cpu)
                 */
                flush_tlb_all();
 
+#ifdef CONFIG_SUPERH64
+               /*
+                * The SH-5 cache uses the ASIDs, requiring both the I and D
+                * cache to be flushed when the ASID is exhausted. Weak.
+                */
+               flush_cache_all();
+#endif
+
                /*
                 * Fix version; Note that we avoid version #0
                 * to distingush NO_CONTEXT.
@@ -86,39 +100,6 @@ static inline int init_new_context(struct task_struct *tsk,
 }
 
 /*
- * 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)
-{
-       unsigned long __dummy;
-
-       __asm__ __volatile__ ("mov.l    %2, %0\n\t"
-                             "and      %3, %0\n\t"
-                             "or       %1, %0\n\t"
-                             "mov.l    %0, %2"
-                             : "=&r" (__dummy)
-                             : "r" (asid), "m" (__m(MMU_PTEH)),
-                               "r" (0xffffff00));
-}
-
-static inline unsigned long get_asid(void)
-{
-       unsigned long asid;
-
-       __asm__ __volatile__ ("mov.l    %1, %0"
-                             : "=r" (asid)
-                             : "m" (__m(MMU_PTEH)));
-       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.
  */
@@ -128,17 +109,6 @@ static inline void activate_context(struct mm_struct *mm, 
unsigned int cpu)
        set_asid(cpu_asid(cpu, mm));
 }
 
-/* MMU_TTB is used for optimizing the fault handling. */
-static inline void set_TTB(pgd_t *pgd)
-{
-       ctrl_outl((unsigned long)pgd, MMU_TTB);
-}
-
-static inline pgd_t *get_TTB(void)
-{
-       return (pgd_t *)ctrl_inl(MMU_TTB);
-}
-
 static inline void switch_mm(struct mm_struct *prev,
                             struct mm_struct *next,
                             struct task_struct *tsk)
@@ -153,17 +123,7 @@ static inline void switch_mm(struct mm_struct *prev,
                if (!cpu_test_and_set(cpu, next->cpu_vm_mask))
                        activate_context(next, cpu);
 }
-
-#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)
-{
-}
-#else /* !CONFIG_MMU */
+#else
 #define get_mmu_context(mm)            do { } while (0)
 #define init_new_context(tsk,mm)       (0)
 #define destroy_context(mm)            do { } while (0)
@@ -173,10 +133,11 @@ enter_lazy_tlb(struct mm_struct *mm, struct task_struct 
*tsk)
 #define get_TTB()                      (0)
 #define activate_context(mm,cpu)       do { } while (0)
 #define switch_mm(prev,next,tsk)       do { } while (0)
+#endif /* CONFIG_MMU */
+
+#define activate_mm(prev, next)                switch_mm((prev),(next),NULL)
 #define deactivate_mm(tsk,mm)          do { } while (0)
-#define activate_mm(prev,next)         do { } while (0)
 #define enter_lazy_tlb(mm,tsk)         do { } while (0)
-#endif /* CONFIG_MMU */
 
 #if defined(CONFIG_CPU_SH3) || defined(CONFIG_CPU_SH4)
 /*
diff --git a/include/asm-sh/mmu_context_32.h b/include/asm-sh/mmu_context_32.h
new file mode 100644
index 0000000..f4f9aeb
--- /dev/null
+++ b/include/asm-sh/mmu_context_32.h
@@ -0,0 +1,47 @@
+#ifndef __ASM_SH_MMU_CONTEXT_32_H
+#define __ASM_SH_MMU_CONTEXT_32_H
+
+/*
+ * 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)
+{
+       unsigned long __dummy;
+
+       __asm__ __volatile__ ("mov.l    %2, %0\n\t"
+                             "and      %3, %0\n\t"
+                             "or       %1, %0\n\t"
+                             "mov.l    %0, %2"
+                             : "=&r" (__dummy)
+                             : "r" (asid), "m" (__m(MMU_PTEH)),
+                               "r" (0xffffff00));
+}
+
+static inline unsigned long get_asid(void)
+{
+       unsigned long asid;
+
+       __asm__ __volatile__ ("mov.l    %1, %0"
+                             : "=r" (asid)
+                             : "m" (__m(MMU_PTEH)));
+       asid &= MMU_CONTEXT_ASID_MASK;
+       return asid;
+}
+
+/* MMU_TTB is used for optimizing the fault handling. */
+static inline void set_TTB(pgd_t *pgd)
+{
+       ctrl_outl((unsigned long)pgd, MMU_TTB);
+}
+
+static inline pgd_t *get_TTB(void)
+{
+       return (pgd_t *)ctrl_inl(MMU_TTB);
+}
+#endif /* __ASM_SH_MMU_CONTEXT_32_H */
diff --git a/include/asm-sh/mmu_context_64.h b/include/asm-sh/mmu_context_64.h
new file mode 100644
index 0000000..020be74
--- /dev/null
+++ b/include/asm-sh/mmu_context_64.h
@@ -0,0 +1,75 @@
+#ifndef __ASM_SH_MMU_CONTEXT_64_H
+#define __ASM_SH_MMU_CONTEXT_64_H
+
+/*
+ * sh64-specific mmu_context interface.
+ *
+ * Copyright (C) 2000, 2001  Paolo Alberelli
+ * Copyright (C) 2003 - 2007  Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <asm/cpu/registers.h>
+#include <asm/cacheflush.h>
+
+#define SR_ASID_MASK           0xffffffffff00ffffULL
+#define SR_ASID_SHIFT          16
+
+/*
+ * 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)
+{
+       /* Well, at least free TLB entries */
+       flush_tlb_mm(mm);
+}
+
+static inline unsigned long get_asid(void)
+{
+       unsigned long long sr;
+
+       asm volatile ("getcon   " __SR ", %0\n\t"
+                     : "=r" (sr));
+
+       sr = (sr >> SR_ASID_SHIFT) & MMU_CONTEXT_ASID_MASK;
+       return (unsigned long) sr;
+}
+
+/* Set ASID into SR */
+static inline void set_asid(unsigned long asid)
+{
+       unsigned long long sr, pc;
+
+       asm volatile ("getcon   " __SR ", %0" : "=r" (sr));
+
+       sr = (sr & SR_ASID_MASK) | (asid << SR_ASID_SHIFT);
+
+       /*
+        * It is possible that this function may be inlined and so to avoid
+        * the assembler reporting duplicate symbols we make use of the
+        * gas trick of generating symbols using numerics and forward
+        * reference.
+        */
+       asm volatile ("movi     1, %1\n\t"
+                     "shlli    %1, 28, %1\n\t"
+                     "or       %0, %1, %1\n\t"
+                     "putcon   %1, " __SR "\n\t"
+                     "putcon   %0, " __SSR "\n\t"
+                     "movi     1f, %1\n\t"
+                     "ori      %1, 1 , %1\n\t"
+                     "putcon   %1, " __SPC "\n\t"
+                     "rte\n"
+                     "1:\n\t"
+                     : "=r" (sr), "=r" (pc) : "0" (sr));
+}
+
+/* No spare register to twiddle, so use a software cache */
+extern pgd_t *mmu_pdtp_cache;
+
+#define set_TTB(pgd)   (mmu_pdtp_cache = (pgd))
+#define get_TTB()      (mmu_pdtp_cache)
+
+#endif /* __ASM_SH_MMU_CONTEXT_64_H */
diff --git a/include/asm-sh64/mmu_context.h b/include/asm-sh64/mmu_context.h
deleted file mode 100644
index 507bf72..0000000
--- a/include/asm-sh64/mmu_context.h
+++ /dev/null
@@ -1,208 +0,0 @@
-#ifndef __ASM_SH64_MMU_CONTEXT_H
-#define __ASM_SH64_MMU_CONTEXT_H
-
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * include/asm-sh64/mmu_context.h
- *
- * Copyright (C) 2000, 2001  Paolo Alberelli
- * Copyright (C) 2003  Paul Mundt
- *
- * ASID handling idea taken from MIPS implementation.
- *
- */
-
-#ifndef __ASSEMBLY__
-
-/*
- * Cache of MMU context last used.
- *
- * The MMU "context" consists of two things:
- *   (a) TLB cache version (or cycle, top 24 bits of mmu_context_cache)
- *   (b) ASID (Address Space IDentifier, bottom 8 bits of mmu_context_cache)
- */
-extern unsigned long mmu_context_cache;
-
-#include <asm/page.h>
-#include <asm-generic/mm_hooks.h>
-
-/* Current mm's pgd */
-extern pgd_t *mmu_pdtp_cache;
-
-#define SR_ASID_MASK           0xffffffffff00ffffULL
-#define SR_ASID_SHIFT          16
-
-#define MMU_CONTEXT_ASID_MASK          0x000000ff
-#define MMU_CONTEXT_VERSION_MASK       0xffffff00
-#define MMU_CONTEXT_FIRST_VERSION      0x00000100
-#define NO_CONTEXT                     0
-
-/* ASID is 8-bit value, so it can't be 0x100 */
-#define MMU_NO_ASID                    0x100
-
-
-/*
- * Virtual Page Number mask
- */
-#define MMU_VPN_MASK   0xfffff000
-
-static inline void
-get_new_mmu_context(struct mm_struct *mm)
-{
-       extern void flush_tlb_all(void);
-       extern void flush_cache_all(void);
-
-       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. */
-               flush_tlb_all();
-               /* We have to flush all caches as ASIDs are
-                   used in cache */
-               flush_cache_all();
-               /* Fix version if needed.
-                  Note that we avoid version #0/asid #0 to distingush 
NO_CONTEXT. */
-               if (!mc)
-                       mmu_context_cache = mc = MMU_CONTEXT_FIRST_VERSION;
-       }
-       mm->context = 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 ^ 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)
-{
-       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)
-{
-       extern void flush_tlb_mm(struct mm_struct *mm);
-
-       /* Well, at least free TLB entries */
-       flush_tlb_mm(mm);
-}
-
-#endif /* __ASSEMBLY__ */
-
-/* Common defines */
-#define TLB_STEP       0x00000010
-#define TLB_PTEH       0x00000000
-#define TLB_PTEL       0x00000008
-
-/* PTEH defines */
-#define PTEH_ASID_SHIFT        2
-#define PTEH_VALID     0x0000000000000001
-#define PTEH_SHARED    0x0000000000000002
-#define PTEH_MATCH_ASID        0x00000000000003ff
-
-#ifndef __ASSEMBLY__
-/* This has to be a common function because the next location to fill
- * information is shared. */
-extern void __do_tlb_refill(unsigned long address, unsigned long long 
is_text_not_data, pte_t *pte);
-
-/* Profiling counter. */
-#ifdef CONFIG_SH64_PROC_TLB
-extern unsigned long long calls_to_do_fast_page_fault;
-#endif
-
-static inline unsigned long get_asid(void)
-{
-       unsigned long long sr;
-
-       asm volatile ("getcon   " __SR ", %0\n\t"
-                     : "=r" (sr));
-
-       sr = (sr >> SR_ASID_SHIFT) & MMU_CONTEXT_ASID_MASK;
-       return (unsigned long) sr;
-}
-
-/* Set ASID into SR */
-static inline void set_asid(unsigned long asid)
-{
-       unsigned long long sr, pc;
-
-       asm volatile ("getcon   " __SR ", %0" : "=r" (sr));
-
-       sr = (sr & SR_ASID_MASK) | (asid << SR_ASID_SHIFT);
-
-       /*
-        * It is possible that this function may be inlined and so to avoid
-        * the assembler reporting duplicate symbols we make use of the gas 
trick
-        * of generating symbols using numerics and forward reference.
-        */
-       asm volatile ("movi     1, %1\n\t"
-                     "shlli    %1, 28, %1\n\t"
-                     "or       %0, %1, %1\n\t"
-                     "putcon   %1, " __SR "\n\t"
-                     "putcon   %0, " __SSR "\n\t"
-                     "movi     1f, %1\n\t"
-                     "ori      %1, 1 , %1\n\t"
-                     "putcon   %1, " __SPC "\n\t"
-                     "rte\n"
-                     "1:\n\t"
-                     : "=r" (sr), "=r" (pc) : "0" (sr));
-}
-
-/*
- * 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 & MMU_CONTEXT_ASID_MASK);
-}
-
-
-static __inline__ void switch_mm(struct mm_struct *prev,
-                                struct mm_struct *next,
-                                struct task_struct *tsk)
-{
-       if (prev != next) {
-               mmu_pdtp_cache = next->pgd;
-               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)
-{
-}
-
-#endif /* __ASSEMBLY__ */
-
-#endif /* __ASM_SH64_MMU_CONTEXT_H */
-
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