sh: Various nommu fixes.

This fixes up some of the various outstanding nommu bugs on
SH.

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

5 files changed, 28 insertions, 13 deletions

diff --git a/include/asm-sh/addrspace.h b/include/asm-sh/addrspace.h
index 720afc11c2ca..4207368267b1 100644
--- a/include/asm-sh/addrspace.h
+++ b/include/asm-sh/addrspace.h
@@ -14,11 +14,19 @@
 #include <asm/cpu/addrspace.h>
 
 /* Memory segments (32bit Privileged mode addresses)  */
+#ifdef CONFIG_MMU
 #define P0SEG           0x00000000
 #define P1SEG           0x80000000
 #define P2SEG           0xa0000000
 #define P3SEG           0xc0000000
 #define P4SEG           0xe0000000
+#else
+#define P0SEG           0x00000000
+#define P1SEG           0x00000000
+#define P2SEG           0x20000000
+#define P3SEG           0x40000000
+#define P4SEG           0x80000000
+#endif
 
 /* Returns the privileged segment base of a given address  */
 #define PXSEG(a)        (((unsigned long)(a)) & 0xe0000000)
diff --git a/include/asm-sh/flat.h b/include/asm-sh/flat.h
index f29072e1c87e..0d5cc04ab005 100644
--- a/include/asm-sh/flat.h
+++ b/include/asm-sh/flat.h
@@ -13,7 +13,7 @@
 #define __ASM_SH_FLAT_H
 
 #define flat_stack_align(sp)                    /* nothing needed */
-#define flat_argvp_envp_on_stack()              1
+#define flat_argvp_envp_on_stack()              0
 #define flat_old_ram_flag(flags)                (flags)
 #define flat_reloc_valid(reloc, size)           ((reloc) <= (size))
 #define flat_get_addr_from_rp(rp, relval, flags)        get_unaligned(rp)
diff --git a/include/asm-sh/mmu.h b/include/asm-sh/mmu.h
index ec09589fa6ca..6383dc84501e 100644
--- a/include/asm-sh/mmu.h
+++ b/include/asm-sh/mmu.h
@@ -3,19 +3,8 @@
 
 #if !defined(CONFIG_MMU)
 
-struct mm_rblock_struct {
-        int     size;
-        int     refcount;
-        void    *kblock;
-};
-
-struct mm_tblock_struct {
-        struct mm_rblock_struct *rblock;
-        struct mm_tblock_struct *next;
-};
-
 typedef struct {
-        struct mm_tblock_struct tblock;
+        struct vm_list_struct   *vmlist;
         unsigned long           end_brk;
 } mm_context_t;
 
diff --git a/include/asm-sh/page.h b/include/asm-sh/page.h
index 1b3cfd165a66..e9135532d00c 100644
--- a/include/asm-sh/page.h
+++ b/include/asm-sh/page.h
@@ -38,8 +38,13 @@
 extern void (*clear_page)(void *to);
 extern void (*copy_page)(void *to, void *from);
 
+#ifdef CONFIG_MMU
 extern void clear_page_slow(void *to);
 extern void copy_page_slow(void *to, void *from);
+#else
+extern void clear_page_nommu(void *to);
+extern void copy_page_nommu(void *to, void *from);
+#endif
 
 #if defined(CONFIG_MMU) && (defined(CONFIG_CPU_SH4) || \
         defined(CONFIG_SH7705_CACHE_32KB))
diff --git a/include/asm-sh/uaccess.h b/include/asm-sh/uaccess.h
index 6c0014dd2ef7..5c3b00c2f107 100644
--- a/include/asm-sh/uaccess.h
+++ b/include/asm-sh/uaccess.h
@@ -168,6 +168,7 @@ do {								\
         __gu_err;                                               \
 })
 
+#ifdef CONFIG_MMU
 #define __get_user_check(x,ptr,size)                            \
 ({                                                              \
         long __gu_err, __gu_val;                                \
@@ -257,6 +258,18 @@ __asm__("stc	r7_bank, %1\n\t"		\
         : "r" (addr)                            \
         : "t");                                 \
 })
+#else /* CONFIG_MMU */
+#define __get_user_check(x,ptr,size)                                    \
+({                                                                      \
+        long __gu_err, __gu_val;                                        \
+        if (__access_ok((unsigned long)(ptr), (size))) {                \
+                __get_user_size(__gu_val, (ptr), (size), __gu_err);     \
+                (x) = (__typeof__(*(ptr)))__gu_val;                     \
+        } else                                                          \
+                __gu_err = -EFAULT;                                     \
+        __gu_err;                                                       \
+})
+#endif
 
 #define __get_user_asm(x, addr, err, insn) \
 ({ \