MIPS: lib: csum_partial: Add EVA support

Use EVA specific functions to read and write data to
user address space.
Signed-off-by: NMarkos Chandras <markos.chandras@imgtec.com>

arch/mips/lib/csum_partial.S

@@ -352,6 +352,19 @@ LEAF(csum_partial)
 		.section __ex_table,"a";	\
 		PTR	9b, handler;		\
 		.previous;			\
+	/* This is enabled in EVA mode */	\
+	.else;					\
+		/* If loading from user or storing to user */	\
+		.if ((\from == USEROP) && (type == LD_INSN)) || \
+		    ((\to == USEROP) && (type == ST_INSN));	\
+9:			__BUILD_EVA_INSN(insn##e, reg, addr);	\
+			.section __ex_table,"a";		\
+			PTR	9b, handler;			\
+			.previous;				\
+		.else;						\
+			/* EVA without exception */		\
+			insn reg, addr;				\
+		.endif;						\
 	.endif
 
 #undef LOAD
@@ -795,7 +808,19 @@ LEAF(csum_partial)
 	.endm
 
 LEAF(__csum_partial_copy_kernel)
+#ifndef CONFIG_EVA
 FEXPORT(__csum_partial_copy_to_user)
 FEXPORT(__csum_partial_copy_from_user)
+#endif
 __BUILD_CSUM_PARTIAL_COPY_USER LEGACY_MODE USEROP USEROP 1
 END(__csum_partial_copy_kernel)
+
+#ifdef CONFIG_EVA
+LEAF(__csum_partial_copy_to_user)
+__BUILD_CSUM_PARTIAL_COPY_USER EVA_MODE KERNELOP USEROP 0
+END(__csum_partial_copy_to_user)
+
+LEAF(__csum_partial_copy_from_user)
+__BUILD_CSUM_PARTIAL_COPY_USER EVA_MODE USEROP KERNELOP 0
+END(__csum_partial_copy_from_user)
+#endif