Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 203 insertions, 0 deletions

diff --git a/arch/csky/include/asm/uaccess.h b/arch/csky/include/asm/uaccess.h
new file mode 100644
index 000000000..2e927c21d
--- /dev/null
+++ b/arch/csky/include/asm/uaccess.h
@@ -0,0 +1,203 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef __ASM_CSKY_UACCESS_H
+#define __ASM_CSKY_UACCESS_H
+
+/*
+ * __put_user_fn
+ */
+extern int __put_user_bad(void);
+
+#define __put_user_asm_b(x, ptr, err)			\
+do {							\
+	int errcode;					\
+	__asm__ __volatile__(				\
+	"1:     stb   %1, (%2,0)	\n"		\
+	"       br    3f		\n"		\
+	"2:     mov   %0, %3		\n"		\
+	"       br    3f		\n"		\
+	".section __ex_table, \"a\"	\n"		\
+	".align   2			\n"		\
+	".long    1b,2b			\n"		\
+	".previous			\n"		\
+	"3:				\n"		\
+	: "=r"(err), "=r"(x), "=r"(ptr), "=r"(errcode)	\
+	: "0"(err), "1"(x), "2"(ptr), "3"(-EFAULT)	\
+	: "memory");					\
+} while (0)
+
+#define __put_user_asm_h(x, ptr, err)			\
+do {							\
+	int errcode;					\
+	__asm__ __volatile__(				\
+	"1:     sth   %1, (%2,0)	\n"		\
+	"       br    3f		\n"		\
+	"2:     mov   %0, %3		\n"		\
+	"       br    3f		\n"		\
+	".section __ex_table, \"a\"	\n"		\
+	".align   2			\n"		\
+	".long    1b,2b			\n"		\
+	".previous			\n"		\
+	"3:				\n"		\
+	: "=r"(err), "=r"(x), "=r"(ptr), "=r"(errcode)	\
+	: "0"(err), "1"(x), "2"(ptr), "3"(-EFAULT)	\
+	: "memory");					\
+} while (0)
+
+#define __put_user_asm_w(x, ptr, err)			\
+do {							\
+	int errcode;					\
+	__asm__ __volatile__(				\
+	"1:     stw   %1, (%2,0)	\n"		\
+	"       br    3f		\n"		\
+	"2:     mov   %0, %3		\n"		\
+	"       br    3f		\n"		\
+	".section __ex_table,\"a\"	\n"		\
+	".align   2			\n"		\
+	".long    1b, 2b		\n"		\
+	".previous			\n"		\
+	"3:				\n"		\
+	: "=r"(err), "=r"(x), "=r"(ptr), "=r"(errcode)	\
+	: "0"(err), "1"(x), "2"(ptr), "3"(-EFAULT)	\
+	: "memory");					\
+} while (0)
+
+#define __put_user_asm_64(x, ptr, err)			\
+do {							\
+	int tmp;					\
+	int errcode;					\
+							\
+	__asm__ __volatile__(				\
+	"     ldw     %3, (%1, 0)     \n"		\
+	"1:   stw     %3, (%2, 0)     \n"		\
+	"     ldw     %3, (%1, 4)     \n"		\
+	"2:   stw     %3, (%2, 4)     \n"		\
+	"     br      4f              \n"		\
+	"3:   mov     %0, %4          \n"		\
+	"     br      4f              \n"		\
+	".section __ex_table, \"a\"   \n"		\
+	".align   2                   \n"		\
+	".long    1b, 3b              \n"		\
+	".long    2b, 3b              \n"		\
+	".previous                    \n"		\
+	"4:                           \n"		\
+	: "=r"(err), "=r"(x), "=r"(ptr),		\
+	  "=r"(tmp), "=r"(errcode)			\
+	: "0"(err), "1"(x), "2"(ptr), "3"(0),		\
+	  "4"(-EFAULT)					\
+	: "memory");					\
+} while (0)
+
+static inline int __put_user_fn(size_t size, void __user *ptr, void *x)
+{
+	int retval = 0;
+	u32 tmp;
+
+	switch (size) {
+	case 1:
+		tmp = *(u8 *)x;
+		__put_user_asm_b(tmp, ptr, retval);
+		break;
+	case 2:
+		tmp = *(u16 *)x;
+		__put_user_asm_h(tmp, ptr, retval);
+		break;
+	case 4:
+		tmp = *(u32 *)x;
+		__put_user_asm_w(tmp, ptr, retval);
+		break;
+	case 8:
+		__put_user_asm_64(x, (u64 *)ptr, retval);
+		break;
+	}
+
+	return retval;
+}
+#define __put_user_fn __put_user_fn
+
+/*
+ * __get_user_fn
+ */
+extern int __get_user_bad(void);
+
+#define __get_user_asm_common(x, ptr, ins, err)		\
+do {							\
+	int errcode;					\
+	__asm__ __volatile__(				\
+	"1:   " ins " %1, (%4, 0)	\n"		\
+	"       br    3f		\n"		\
+	"2:     mov   %0, %2		\n"		\
+	"       movi  %1, 0		\n"		\
+	"       br    3f		\n"		\
+	".section __ex_table,\"a\"      \n"		\
+	".align   2			\n"		\
+	".long    1b, 2b		\n"		\
+	".previous			\n"		\
+	"3:				\n" 		\
+	: "=r"(err), "=r"(x), "=r"(errcode)		\
+	: "0"(0), "r"(ptr), "2"(-EFAULT)		\
+	: "memory");					\
+} while (0)
+
+#define __get_user_asm_64(x, ptr, err)			\
+do {							\
+	int tmp;					\
+	int errcode;					\
+							\
+	__asm__ __volatile__(				\
+	"1:   ldw     %3, (%2, 0)     \n"		\
+	"     stw     %3, (%1, 0)     \n"		\
+	"2:   ldw     %3, (%2, 4)     \n"		\
+	"     stw     %3, (%1, 4)     \n"		\
+	"     br      4f              \n"		\
+	"3:   mov     %0, %4          \n"		\
+	"     br      4f              \n"		\
+	".section __ex_table, \"a\"   \n"		\
+	".align   2                   \n"		\
+	".long    1b, 3b              \n"		\
+	".long    2b, 3b              \n"		\
+	".previous                    \n"		\
+	"4:                           \n"		\
+	: "=r"(err), "=r"(x), "=r"(ptr),		\
+	  "=r"(tmp), "=r"(errcode)			\
+	: "0"(err), "1"(x), "2"(ptr), "3"(0),		\
+	  "4"(-EFAULT)					\
+	: "memory");					\
+} while (0)
+
+static inline int __get_user_fn(size_t size, const void __user *ptr, void *x)
+{
+	int retval;
+	u32 tmp;
+
+	switch (size) {
+	case 1:
+		__get_user_asm_common(tmp, ptr, "ldb", retval);
+		*(u8 *)x = (u8)tmp;
+		break;
+	case 2:
+		__get_user_asm_common(tmp, ptr, "ldh", retval);
+		*(u16 *)x = (u16)tmp;
+		break;
+	case 4:
+		__get_user_asm_common(tmp, ptr, "ldw", retval);
+		*(u32 *)x = (u32)tmp;
+		break;
+	case 8:
+		__get_user_asm_64(x, ptr, retval);
+		break;
+	}
+
+	return retval;
+}
+#define __get_user_fn __get_user_fn
+
+unsigned long raw_copy_from_user(void *to, const void *from, unsigned long n);
+unsigned long raw_copy_to_user(void *to, const void *from, unsigned long n);
+
+unsigned long __clear_user(void __user *to, unsigned long n);
+#define __clear_user __clear_user
+
+#include <asm-generic/uaccess.h>
+
+#endif /* __ASM_CSKY_UACCESS_H */