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authorPaul Mundt <lethal@linux-sh.org>2008-06-03 18:48:54 +0900
committerPaul Mundt <lethal@linux-sh.org>2008-07-28 18:10:28 +0900
commit02f7e627f9248a478cf790112a07ae2c612b895a (patch)
tree0172f4eed00a20fdcde5eb6a252c5f47c78ceb2b /include/asm-sh
parent3787aa112c653b34b6f901b2eaae2b62f9582569 (diff)
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sh: Consolidate segment modifiers across mmu/nommu systems.
This moves get_fs/set_fs() and friends in to asm/segment.h. The mm_segment_t definition is likewise consolidated from the _32/_64 split. This is prepatory groundwork for using the generic address space limit and verification routines across mmu/nommu configs. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'include/asm-sh')
-rw-r--r--include/asm-sh/processor.h1
-rw-r--r--include/asm-sh/processor_32.h4
-rw-r--r--include/asm-sh/processor_64.h4
-rw-r--r--include/asm-sh/segment.h30
-rw-r--r--include/asm-sh/uaccess_32.h33
5 files changed, 33 insertions, 39 deletions
diff --git a/include/asm-sh/processor.h b/include/asm-sh/processor.h
index b7c7ce80f03..15d9f92ca38 100644
--- a/include/asm-sh/processor.h
+++ b/include/asm-sh/processor.h
@@ -2,6 +2,7 @@
#define __ASM_SH_PROCESSOR_H
#include <asm/cpu-features.h>
+#include <asm/segment.h>
#ifndef __ASSEMBLY__
/*
diff --git a/include/asm-sh/processor_32.h b/include/asm-sh/processor_32.h
index c09305d6a9d..81628f144fa 100644
--- a/include/asm-sh/processor_32.h
+++ b/include/asm-sh/processor_32.h
@@ -113,10 +113,6 @@ struct thread_struct {
union sh_fpu_union fpu;
};
-typedef struct {
- unsigned long seg;
-} mm_segment_t;
-
/* Count of active tasks with UBC settings */
extern int ubc_usercnt;
diff --git a/include/asm-sh/processor_64.h b/include/asm-sh/processor_64.h
index 88a2edf8fa5..fc7fc685ba2 100644
--- a/include/asm-sh/processor_64.h
+++ b/include/asm-sh/processor_64.h
@@ -166,10 +166,6 @@ struct thread_struct {
union sh_fpu_union fpu;
};
-typedef struct {
- unsigned long seg;
-} mm_segment_t;
-
#define INIT_MMAP \
{ &init_mm, 0, 0, NULL, PAGE_SHARED, VM_READ | VM_WRITE | VM_EXEC, 1, NULL, NULL }
diff --git a/include/asm-sh/segment.h b/include/asm-sh/segment.h
index e417eab4c7d..5e2725f4ac4 100644
--- a/include/asm-sh/segment.h
+++ b/include/asm-sh/segment.h
@@ -1,6 +1,34 @@
#ifndef __ASM_SH_SEGMENT_H
#define __ASM_SH_SEGMENT_H
-/* Only here because we have some old header files that expect it.. */
+#ifndef __ASSEMBLY__
+typedef struct {
+ unsigned long seg;
+} mm_segment_t;
+
+#define MAKE_MM_SEG(s) ((mm_segment_t) { (s) })
+
+/*
+ * The fs value determines whether argument validity checking should be
+ * performed or not. If get_fs() == USER_DS, checking is performed, with
+ * get_fs() == KERNEL_DS, checking is bypassed.
+ *
+ * For historical reasons, these macros are grossly misnamed.
+ */
+#define KERNEL_DS MAKE_MM_SEG(0xFFFFFFFFUL)
+#ifdef CONFIG_MMU
+#define USER_DS MAKE_MM_SEG(PAGE_OFFSET)
+#else
+#define USER_DS KERNEL_DS
+#endif
+
+#define segment_eq(a,b) ((a).seg == (b).seg)
+
+#define get_ds() (KERNEL_DS)
+
+#define get_fs() (current_thread_info()->addr_limit)
+#define set_fs(x) (current_thread_info()->addr_limit = (x))
+
+#endif /* __ASSEMBLY__ */
#endif /* __ASM_SH_SEGMENT_H */
diff --git a/include/asm-sh/uaccess_32.h b/include/asm-sh/uaccess_32.h
index 1e41fda74bd..0795ee5919d 100644
--- a/include/asm-sh/uaccess_32.h
+++ b/include/asm-sh/uaccess_32.h
@@ -1,9 +1,8 @@
-/* $Id: uaccess.h,v 1.11 2003/10/13 07:21:20 lethal Exp $
- *
+/*
* User space memory access functions
*
* Copyright (C) 1999, 2002 Niibe Yutaka
- * Copyright (C) 2003 Paul Mundt
+ * Copyright (C) 2003 - 2008 Paul Mundt
*
* Based on:
* MIPS implementation version 1.15 by
@@ -15,40 +14,16 @@
#include <linux/errno.h>
#include <linux/sched.h>
+#include <asm/segment.h>
#define VERIFY_READ 0
#define VERIFY_WRITE 1
-/*
- * The fs value determines whether argument validity checking should be
- * performed or not. If get_fs() == USER_DS, checking is performed, with
- * get_fs() == KERNEL_DS, checking is bypassed.
- *
- * For historical reasons (Data Segment Register?), these macros are misnamed.
- */
-
-#define MAKE_MM_SEG(s) ((mm_segment_t) { (s) })
-
-#define KERNEL_DS MAKE_MM_SEG(0xFFFFFFFFUL)
-#define USER_DS MAKE_MM_SEG(PAGE_OFFSET)
-
-#define segment_eq(a,b) ((a).seg == (b).seg)
-
-#define get_ds() (KERNEL_DS)
#if !defined(CONFIG_MMU)
/* NOMMU is always true */
#define __addr_ok(addr) (1)
-static inline mm_segment_t get_fs(void)
-{
- return USER_DS;
-}
-
-static inline void set_fs(mm_segment_t s)
-{
-}
-
/*
* __access_ok: Check if address with size is OK or not.
*
@@ -64,8 +39,6 @@ static inline int __access_ok(unsigned long addr, unsigned long size)
#define __addr_ok(addr) \
((unsigned long)(addr) < (current_thread_info()->addr_limit.seg))
-#define get_fs() (current_thread_info()->addr_limit)
-#define set_fs(x) (current_thread_info()->addr_limit = (x))
/*
* __access_ok: Check if address with size is OK or not.