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>
diff --git a/include/asm-sh/addrspace.h b/include/asm-sh/addrspace.h
index 720afc1..4207368 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 f29072e..0d5cc04 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 ec09589..6383dc8 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 1b3cfd1..e913553 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 6c0014d..5c3b00c 100644
--- a/include/asm-sh/uaccess.h
+++ b/include/asm-sh/uaccess.h
@@ -168,6 +168,7 @@
__gu_err; \
})
+#ifdef CONFIG_MMU
#define __get_user_check(x,ptr,size) \
({ \
long __gu_err, __gu_val; \
@@ -257,6 +258,18 @@
: "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) \
({ \