--- /dev/null
+/*
+ * include/asm-xtensa/uaccess.h
+ *
+ * User space memory access functions
+ *
+ * These routines provide basic accessing functions to the user memory
+ * space for the kernel. This header file provides functions such as:
+ *
+ * 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.
+ *
+ * Copyright (C) 2001 - 2005 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_ASM_UACCESS_H
+#define _XTENSA_ASM_UACCESS_H
+
+#include <linux/errno.h>
+#include <asm/types.h>
+
+#define VERIFY_READ 0
+#define VERIFY_WRITE 1
+
+#include <asm/current.h>
+#include <asm/asm-offsets.h>
+#include <asm/processor.h>
+
+/*
+ * These assembly macros mirror the C macros in asm/uaccess.h. They
+ * should always have identical functionality. See
+ * arch/xtensa/kernel/sys.S for usage.
+ */
+
+#define KERNEL_DS 0
+#define USER_DS 1
+
+#define get_ds (KERNEL_DS)
+
+/*
+ * get_fs reads current->thread.current_ds into a register.
+ * On Entry:
+ * <ad> anything
+ * <sp> stack
+ * On Exit:
+ * <ad> contains current->thread.current_ds
+ */
+ .macro get_fs ad, sp
+ GET_CURRENT(\ad,\sp)
+#if THREAD_CURRENT_DS > 1020
+ addi \ad, \ad, TASK_THREAD
+ l32i \ad, \ad, THREAD_CURRENT_DS - TASK_THREAD
+#else
+ l32i \ad, \ad, THREAD_CURRENT_DS
+#endif
+ .endm
+
+/*
+ * set_fs sets current->thread.current_ds to some value.
+ * On Entry:
+ * <at> anything (temp register)
+ * <av> value to write
+ * <sp> stack
+ * On Exit:
+ * <at> destroyed (actually, current)
+ * <av> preserved, value to write
+ */
+ .macro set_fs at, av, sp
+ GET_CURRENT(\at,\sp)
+ s32i \av, \at, THREAD_CURRENT_DS
+ .endm
+
+/*
+ * kernel_ok determines whether we should bypass addr/size checking.
+ * See the equivalent C-macro version below for clarity.
+ * On success, kernel_ok branches to a label indicated by parameter
+ * <success>. This implies that the macro falls through to the next
+ * insruction on an error.
+ *
+ * Note that while this macro can be used independently, we designed
+ * in for optimal use in the access_ok macro below (i.e., we fall
+ * through on error).
+ *
+ * On Entry:
+ * <at> anything (temp register)
+ * <success> label to branch to on success; implies
+ * fall-through macro on error
+ * <sp> stack pointer
+ * On Exit:
+ * <at> destroyed (actually, current->thread.current_ds)
+ */
+
+#if ((KERNEL_DS != 0) || (USER_DS == 0))
+# error Assembly macro kernel_ok fails
+#endif
+ .macro kernel_ok at, sp, success
+ get_fs \at, \sp
+ beqz \at, \success
+ .endm
+
+/*
+ * user_ok determines whether the access to user-space memory is allowed.
+ * See the equivalent C-macro version below for clarity.
+ *
+ * On error, user_ok branches to a label indicated by parameter
+ * <error>. This implies that the macro falls through to the next
+ * instruction on success.
+ *
+ * Note that while this macro can be used independently, we designed
+ * in for optimal use in the access_ok macro below (i.e., we fall
+ * through on success).
+ *
+ * On Entry:
+ * <aa> register containing memory address
+ * <as> register containing memory size
+ * <at> temp register
+ * <error> label to branch to on error; implies fall-through
+ * macro on success
+ * On Exit:
+ * <aa> preserved
+ * <as> preserved
+ * <at> destroyed (actually, (TASK_SIZE + 1 - size))
+ */
+ .macro user_ok aa, as, at, error
+ movi \at, __XTENSA_UL_CONST(TASK_SIZE)
+ bgeu \as, \at, \error
+ sub \at, \at, \as
+ bgeu \aa, \at, \error
+ .endm
+
+/*
+ * access_ok determines whether a memory access is allowed. See the
+ * equivalent C-macro version below for clarity.
+ *
+ * On error, access_ok branches to a label indicated by parameter
+ * <error>. This implies that the macro falls through to the next
+ * instruction on success.
+ *
+ * Note that we assume success is the common case, and we optimize the
+ * branch fall-through case on success.
+ *
+ * On Entry:
+ * <aa> register containing memory address
+ * <as> register containing memory size
+ * <at> temp register
+ * <sp>
+ * <error> label to branch to on error; implies fall-through
+ * macro on success
+ * On Exit:
+ * <aa> preserved
+ * <as> preserved
+ * <at> destroyed
+ */
+ .macro access_ok aa, as, at, sp, error
+ kernel_ok \at, \sp, .Laccess_ok_\@
+ user_ok \aa, \as, \at, \error
+.Laccess_ok_\@:
+ .endm
+
+#endif /* _XTENSA_ASM_UACCESS_H */
#define _XTENSA_UACCESS_H
#include <linux/errno.h>
-#ifndef __ASSEMBLY__
#include <linux/prefetch.h>
-#endif
#include <asm/types.h>
#define VERIFY_READ 0
#define VERIFY_WRITE 1
-#ifdef __ASSEMBLY__
-
-#include <asm/current.h>
-#include <asm/asm-offsets.h>
-#include <asm/processor.h>
-
-/*
- * These assembly macros mirror the C macros that follow below. They
- * should always have identical functionality. See
- * arch/xtensa/kernel/sys.S for usage.
- */
-
-#define KERNEL_DS 0
-#define USER_DS 1
-
-#define get_ds (KERNEL_DS)
-
-/*
- * get_fs reads current->thread.current_ds into a register.
- * On Entry:
- * <ad> anything
- * <sp> stack
- * On Exit:
- * <ad> contains current->thread.current_ds
- */
- .macro get_fs ad, sp
- GET_CURRENT(\ad,\sp)
-#if THREAD_CURRENT_DS > 1020
- addi \ad, \ad, TASK_THREAD
- l32i \ad, \ad, THREAD_CURRENT_DS - TASK_THREAD
-#else
- l32i \ad, \ad, THREAD_CURRENT_DS
-#endif
- .endm
-
-/*
- * set_fs sets current->thread.current_ds to some value.
- * On Entry:
- * <at> anything (temp register)
- * <av> value to write
- * <sp> stack
- * On Exit:
- * <at> destroyed (actually, current)
- * <av> preserved, value to write
- */
- .macro set_fs at, av, sp
- GET_CURRENT(\at,\sp)
- s32i \av, \at, THREAD_CURRENT_DS
- .endm
-
-/*
- * kernel_ok determines whether we should bypass addr/size checking.
- * See the equivalent C-macro version below for clarity.
- * On success, kernel_ok branches to a label indicated by parameter
- * <success>. This implies that the macro falls through to the next
- * insruction on an error.
- *
- * Note that while this macro can be used independently, we designed
- * in for optimal use in the access_ok macro below (i.e., we fall
- * through on error).
- *
- * On Entry:
- * <at> anything (temp register)
- * <success> label to branch to on success; implies
- * fall-through macro on error
- * <sp> stack pointer
- * On Exit:
- * <at> destroyed (actually, current->thread.current_ds)
- */
-
-#if ((KERNEL_DS != 0) || (USER_DS == 0))
-# error Assembly macro kernel_ok fails
-#endif
- .macro kernel_ok at, sp, success
- get_fs \at, \sp
- beqz \at, \success
- .endm
-
-/*
- * user_ok determines whether the access to user-space memory is allowed.
- * See the equivalent C-macro version below for clarity.
- *
- * On error, user_ok branches to a label indicated by parameter
- * <error>. This implies that the macro falls through to the next
- * instruction on success.
- *
- * Note that while this macro can be used independently, we designed
- * in for optimal use in the access_ok macro below (i.e., we fall
- * through on success).
- *
- * On Entry:
- * <aa> register containing memory address
- * <as> register containing memory size
- * <at> temp register
- * <error> label to branch to on error; implies fall-through
- * macro on success
- * On Exit:
- * <aa> preserved
- * <as> preserved
- * <at> destroyed (actually, (TASK_SIZE + 1 - size))
- */
- .macro user_ok aa, as, at, error
- movi \at, __XTENSA_UL_CONST(TASK_SIZE)
- bgeu \as, \at, \error
- sub \at, \at, \as
- bgeu \aa, \at, \error
- .endm
-
-/*
- * access_ok determines whether a memory access is allowed. See the
- * equivalent C-macro version below for clarity.
- *
- * On error, access_ok branches to a label indicated by parameter
- * <error>. This implies that the macro falls through to the next
- * instruction on success.
- *
- * Note that we assume success is the common case, and we optimize the
- * branch fall-through case on success.
- *
- * On Entry:
- * <aa> register containing memory address
- * <as> register containing memory size
- * <at> temp register
- * <sp>
- * <error> label to branch to on error; implies fall-through
- * macro on success
- * On Exit:
- * <aa> preserved
- * <as> preserved
- * <at> destroyed
- */
- .macro access_ok aa, as, at, sp, error
- kernel_ok \at, \sp, .Laccess_ok_\@
- user_ok \aa, \as, \at, \error
-.Laccess_ok_\@:
- .endm
-
-#else /* __ASSEMBLY__ not defined */
-
#include <linux/sched.h>
/*
unsigned long insn, fixup;
};
-#endif /* __ASSEMBLY__ */
#endif /* _XTENSA_UACCESS_H */
#include <asm/processor.h>
#include <asm/coprocessor.h>
#include <asm/thread_info.h>
-#include <asm/uaccess.h>
+#include <asm/asm-uaccess.h>
#include <asm/unistd.h>
#include <asm/ptrace.h>
#include <asm/current.h>
#include <asm/processor.h>
#include <asm/coprocessor.h>
#include <asm/thread_info.h>
-#include <asm/uaccess.h>
+#include <asm/asm-uaccess.h>
#include <asm/unistd.h>
#include <asm/ptrace.h>
#include <asm/current.h>
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