waterDataFluctuationCorrelation dataOperationOfSprayTerminal.h 袁明明 commit at 2021-02-26

waterDataFluctuationCorrelation/databaseOperation/dataOperationOfSprayTerminal.h

@@ -413,3 +413,102 @@ struct __large_struct { unsigned long buf[100]; };
  * we return the initial request size (1, 2 or 4), as copy_*_user should do.
  * If a store crosses a page boundary and gets a fault, the m32r will not write
  * anything, so this is accurate.
+ */
+
+/*
+ * Copy To/From Userspace
+ */
+
+/* Generic arbitrary sized copy.  */
+/* Return the number of bytes NOT copied.  */
+#define __copy_user(to,from,size)					\
+do {									\
+	unsigned long __dst, __src, __c;				\
+	__asm__ __volatile__ (						\
+		"	mv	r14, %0\n"				\
+		"	or	r14, %1\n"				\
+		"	beq	%0, %1, 9f\n"				\
+		"	beqz	%2, 9f\n"				\
+		"	and3	r14, r14, #3\n"				\
+		"	bnez	r14, 2f\n"				\
+		"	and3	%2, %2, #3\n"				\
+		"	beqz	%3, 2f\n"				\
+		"	addi	%0, #-4		; word_copy \n"		\
+		"	.fillinsn\n"					\
+		"0:	ld	r14, @%1+\n"				\
+		"	addi	%3, #-1\n"				\
+		"	.fillinsn\n"					\
+		"1:	st	r14, @+%0\n"				\
+		"	bnez	%3, 0b\n"				\
+		"	beqz	%2, 9f\n"				\
+		"	addi	%0, #4\n"				\
+		"	.fillinsn\n"					\
+		"2:	ldb	r14, @%1	; byte_copy \n"		\
+		"	.fillinsn\n"					\
+		"3:	stb	r14, @%0\n"				\
+		"	addi	%1, #1\n"				\
+		"	addi	%2, #-1\n"				\
+		"	addi	%0, #1\n"				\
+		"	bnez	%2, 2b\n"				\
+		"	.fillinsn\n"					\
+		"9:\n"							\
+		".section .fixup,\"ax\"\n"				\
+		"	.balign 4\n"					\
+		"5:	addi	%3, #1\n"				\
+		"	addi	%1, #-4\n"				\
+		"	.fillinsn\n"					\
+		"6:	slli	%3, #2\n"				\
+		"	add	%2, %3\n"				\
+		"	addi	%0, #4\n"				\
+		"	.fillinsn\n"					\
+		"7:	seth	r14, #high(9b)\n"			\
+		"	or3	r14, r14, #low(9b)\n"			\
+		"	jmp	r14\n"					\
+		".previous\n"						\
+		".section __ex_table,\"a\"\n"				\
+		"	.balign 4\n"					\
+		"	.long 0b,6b\n"					\
+		"	.long 1b,5b\n"					\
+		"	.long 2b,9b\n"					\
+		"	.long 3b,9b\n"					\
+		".previous\n"						\
+		: "=&r" (__dst), "=&r" (__src), "=&r" (size),		\
+		  "=&r" (__c)						\
+		: "0" (to), "1" (from), "2" (size), "3" (size / 4)	\
+		: "r14", "memory");					\
+} while (0)
+
+#define __copy_user_zeroing(to,from,size)				\
+do {									\
+	unsigned long __dst, __src, __c;				\
+	__asm__ __volatile__ (						\
+		"	mv	r14, %0\n"				\
+		"	or	r14, %1\n"				\
+		"	beq	%0, %1, 9f\n"				\
+		"	beqz	%2, 9f\n"				\
+		"	and3	r14, r14, #3\n"				\
+		"	bnez	r14, 2f\n"				\
+		"	and3	%2, %2, #3\n"				\
+		"	beqz	%3, 2f\n"				\
+		"	addi	%0, #-4		; word_copy \n"		\
+		"	.fillinsn\n"					\
+		"0:	ld	r14, @%1+\n"				\
+		"	addi	%3, #-1\n"				\
+		"	.fillinsn\n"					\
+		"1:	st	r14, @+%0\n"				\
+		"	bnez	%3, 0b\n"				\
+		"	beqz	%2, 9f\n"				\
+		"	addi	%0, #4\n"				\
+		"	.fillinsn\n"					\
+		"2:	ldb	r14, @%1	; byte_copy \n"		\
+		"	.fillinsn\n"					\
+		"3:	stb	r14, @%0\n"				\
+		"	addi	%1, #1\n"				\
+		"	addi	%2, #-1\n"				\
+		"	addi	%0, #1\n"				\
+		"	bnez	%2, 2b\n"				\
+		"	.fillinsn\n"					\
+		"9:\n"							\
+		".section .fixup,\"ax\"\n"				\
+		"	.balign 4\n"					\
+		"5:	addi	%3, #1\n"				\