5 files changed, 62 insertions, 46 deletions

diff --git a/arch/sh/include/asm/io.h b/arch/sh/include/asm/io.h
index bd5fafa23eb4..7dab7b23a5ec 100644
--- a/arch/sh/include/asm/io.h
+++ b/arch/sh/include/asm/io.h
@@ -133,6 +133,28 @@ static inline void ctrl_delay(void)
         __raw_readw(generic_io_base);
 }
 
+#define __BUILD_UNCACHED_IO(bwlq, type)                                 \
+static inline type read##bwlq##_uncached(unsigned long addr)            \
+{                                                                       \
+        type ret;                                                       \
+        jump_to_uncached();                                             \
+        ret = __raw_read##bwlq(addr);                                   \
+        back_to_cached();                                               \
+        return ret;                                                     \
+}                                                                       \
+                                                                        \
+static inline void write##bwlq##_uncached(type v, unsigned long addr)   \
+{                                                                       \
+        jump_to_uncached();                                             \
+        __raw_write##bwlq(v, addr);                                     \
+        back_to_cached();                                               \
+}
+
+__BUILD_UNCACHED_IO(b, u8)
+__BUILD_UNCACHED_IO(w, u16)
+__BUILD_UNCACHED_IO(l, u32)
+__BUILD_UNCACHED_IO(q, u64)
+
 #define __BUILD_MEMORY_STRING(bwlq, type)                               \
                                                                         \
 static inline void __raw_writes##bwlq(volatile void __iomem *mem,       \
diff --git a/arch/sh/include/asm/mmu.h b/arch/sh/include/asm/mmu.h
index ca7d91e8aa72..15a05b615ba7 100644
--- a/arch/sh/include/asm/mmu.h
+++ b/arch/sh/include/asm/mmu.h
@@ -11,7 +11,9 @@
 
 #define PMB_ADDR                0xf6100000
 #define PMB_DATA                0xf7100000
-#define PMB_ENTRY_MAX           16
+
+#define NR_PMB_ENTRIES          16
+
 #define PMB_E_MASK              0x0000000f
 #define PMB_E_SHIFT             8
 
@@ -25,6 +27,7 @@
 #define PMB_C                   0x00000008
 #define PMB_WT                  0x00000001
 #define PMB_UB                  0x00000200
+#define PMB_CACHE_MASK          (PMB_C | PMB_WT | PMB_UB)
 #define PMB_V                   0x00000100
 
 #define PMB_NO_ENTRY            (-1)
@@ -32,6 +35,7 @@
 #ifndef __ASSEMBLY__
 #include <linux/errno.h>
 #include <linux/threads.h>
+#include <asm/page.h>
 
 /* Default "unsigned long" context */
 typedef unsigned long mm_context_id_t[NR_CPUS];
@@ -49,46 +53,22 @@ typedef struct {
 #endif
 } mm_context_t;
 
-struct pmb_entry;
-
-struct pmb_entry {
-        unsigned long vpn;
-        unsigned long ppn;
-        unsigned long flags;
-
-        /*
-         * 0 .. NR_PMB_ENTRIES for specific entry selection, or
-         * PMB_NO_ENTRY to search for a free one
-         */
-        int entry;
-
-        struct pmb_entry *next;
-        /* Adjacent entry link for contiguous multi-entry mappings */
-        struct pmb_entry *link;
-};
-
 #ifdef CONFIG_PMB
 /* arch/sh/mm/pmb.c */
 long pmb_remap(unsigned long virt, unsigned long phys,
-               unsigned long size, unsigned long flags);
+               unsigned long size, pgprot_t prot);
 void pmb_unmap(unsigned long addr);
-int pmb_init(void);
+void pmb_init(void);
 bool __in_29bit_mode(void);
 #else
 static inline long pmb_remap(unsigned long virt, unsigned long phys,
-                             unsigned long size, unsigned long flags)
+                             unsigned long size, pgprot_t prot)
 {
         return -EINVAL;
 }
 
-static inline void pmb_unmap(unsigned long addr)
-{
-}
-
-static inline int pmb_init(void)
-{
-        return -ENODEV;
-}
+#define pmb_unmap(addr)         do { } while (0)
+#define pmb_init(addr)          do { } while (0)
 
 #ifdef CONFIG_29BIT
 #define __in_29bit_mode()       (1)
diff --git a/arch/sh/include/asm/page.h b/arch/sh/include/asm/page.h
index 61e58105adc3..d71feb359304 100644
--- a/arch/sh/include/asm/page.h
+++ b/arch/sh/include/asm/page.h
@@ -45,6 +45,7 @@
 #endif
 
 #ifndef __ASSEMBLY__
+#include <asm/uncached.h>
 
 extern unsigned long shm_align_mask;
 extern unsigned long max_low_pfn, min_low_pfn;
@@ -56,7 +57,6 @@ pages_do_alias(unsigned long addr1, unsigned long addr2)
         return (addr1 ^ addr2) & shm_align_mask;
 }
 
-
 #define clear_page(page)        memset((void *)(page), 0, PAGE_SIZE)
 extern void copy_page(void *to, void *from);
 
@@ -127,12 +127,7 @@ typedef struct page *pgtable_t;
  * is not visible (it is part of the PMB mapping) and so needs to be
  * added or subtracted as required.
  */
-#if defined(CONFIG_PMB_LEGACY)
-/* phys = virt - PAGE_OFFSET - (__MEMORY_START & 0xe0000000) */
-#define PMB_OFFSET      (PAGE_OFFSET - PXSEG(__MEMORY_START))
-#define __pa(x) ((unsigned long)(x) - PMB_OFFSET)
-#define __va(x) ((void *)((unsigned long)(x) + PMB_OFFSET))
-#elif defined(CONFIG_32BIT)
+#ifdef CONFIG_PMB
 #define __pa(x) ((unsigned long)(x)-PAGE_OFFSET+__MEMORY_START)
 #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET-__MEMORY_START))
 #else
@@ -140,6 +135,14 @@ typedef struct page *pgtable_t;
 #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
 #endif
 
+#ifdef CONFIG_UNCACHED_MAPPING
+#define UNCAC_ADDR(addr)        ((addr) - PAGE_OFFSET + uncached_start)
+#define CAC_ADDR(addr)          ((addr) - uncached_start + PAGE_OFFSET)
+#else
+#define UNCAC_ADDR(addr)        ((addr))
+#define CAC_ADDR(addr)          ((addr))
+#endif
+
 #define pfn_to_kaddr(pfn)       __va((pfn) << PAGE_SHIFT)
 #define page_to_phys(page)      (page_to_pfn(page) << PAGE_SHIFT)
 
diff --git a/arch/sh/include/asm/ptrace.h b/arch/sh/include/asm/ptrace.h
index e879dffa324b..e11b14ea2c43 100644
--- a/arch/sh/include/asm/ptrace.h
+++ b/arch/sh/include/asm/ptrace.h
@@ -139,15 +139,8 @@ static inline unsigned long profile_pc(struct pt_regs *regs)
 {
         unsigned long pc = instruction_pointer(regs);
 
-#ifdef CONFIG_UNCACHED_MAPPING
-        /*
-         * If PC points in to the uncached mapping, fix it up and hand
-         * back the cached equivalent.
-         */
-        if ((pc >= (memory_start + cached_to_uncached)) &&
-            (pc <  (memory_start + cached_to_uncached + uncached_size)))
-                pc -= cached_to_uncached;
-#endif
+        if (virt_addr_uncached(pc))
+                return CAC_ADDR(pc);
 
         return pc;
 }
diff --git a/arch/sh/include/asm/uncached.h b/arch/sh/include/asm/uncached.h
new file mode 100644
index 000000000000..e3419f96626a
--- /dev/null
+++ b/arch/sh/include/asm/uncached.h
@@ -0,0 +1,18 @@
+#ifndef __ASM_SH_UNCACHED_H
+#define __ASM_SH_UNCACHED_H
+
+#include <linux/bug.h>
+
+#ifdef CONFIG_UNCACHED_MAPPING
+extern unsigned long uncached_start, uncached_end;
+
+extern int virt_addr_uncached(unsigned long kaddr);
+extern void uncached_init(void);
+extern void uncached_resize(unsigned long size);
+#else
+#define virt_addr_uncached(kaddr)       (0)
+#define uncached_init()                 do { } while (0)
+#define uncached_resize(size)           BUG()
+#endif
+
+#endif /* __ASM_SH_UNCACHED_H */