[U-Boot] [PATCH v2 02/20] ARC: cache: remove per-line I$ operations as unused

[Eugeniy Paltsev]

__cache_line_loop function was copied from linux kernel code
where per line instruction cache operations are used. In
uboot we use only entire instruction cache operations, so
we can drop support of per line instruction cache operations
from __cache_line_loop function as __cache_line_loop is never
called with OP_INV_IC parameter.

Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev at synopsys.com>
---
 arch/arc/lib/cache.c | 30 +++++++-----------------------
 1 file changed, 7 insertions(+), 23 deletions(-)

diff --git a/arch/arc/lib/cache.c b/arch/arc/lib/cache.c
index 26f0a1ff9b..2252542f16 100644
--- a/arch/arc/lib/cache.c
+++ b/arch/arc/lib/cache.c
@@ -23,7 +23,6 @@
 
 #define OP_INV		0x1
 #define OP_FLUSH	0x2
-#define OP_INV_IC	0x3
 
 /* Bit val in SLC_CONTROL */
 #define SLC_CTRL_DIS		0x001
@@ -373,30 +372,15 @@ void dcache_disable(void)
 }
 
 #ifndef CONFIG_SYS_DCACHE_OFF
-/*
- * Common Helper for Line Operations on {I,D}-Cache
- */
-static inline void __cache_line_loop(unsigned long paddr, unsigned long sz,
-				     const int cacheop)
+/* Common Helper for Line Operations on D-cache */
+static inline void __dcache_line_loop(unsigned long paddr, unsigned long sz,
+				      const int cacheop)
 {
 	unsigned int aux_cmd;
-#if (CONFIG_ARC_MMU_VER == 3)
-	unsigned int aux_tag;
-#endif
 	int num_lines;
 
-	if (cacheop == OP_INV_IC) {
-		aux_cmd = ARC_AUX_IC_IVIL;
-#if (CONFIG_ARC_MMU_VER == 3)
-		aux_tag = ARC_AUX_IC_PTAG;
-#endif
-	} else {
-		/* d$ cmd: INV (discard or wback-n-discard) OR FLUSH (wback) */
-		aux_cmd = cacheop & OP_INV ? ARC_AUX_DC_IVDL : ARC_AUX_DC_FLDL;
-#if (CONFIG_ARC_MMU_VER == 3)
-		aux_tag = ARC_AUX_DC_PTAG;
-#endif
-	}
+	/* d$ cmd: INV (discard or wback-n-discard) OR FLUSH (wback) */
+	aux_cmd = cacheop & OP_INV ? ARC_AUX_DC_IVDL : ARC_AUX_DC_FLDL;
 
 	sz += paddr & ~CACHE_LINE_MASK;
 	paddr &= CACHE_LINE_MASK;
@@ -405,7 +389,7 @@ static inline void __cache_line_loop(unsigned long paddr, unsigned long sz,
 
 	while (num_lines-- > 0) {
 #if (CONFIG_ARC_MMU_VER == 3)
-		write_aux_reg(aux_tag, paddr);
+		write_aux_reg(ARC_AUX_DC_PTAG, paddr);
 #endif
 		write_aux_reg(aux_cmd, paddr);
 		paddr += l1_line_sz;
@@ -458,7 +442,7 @@ static inline void __dc_line_op(unsigned long paddr, unsigned long sz,
 {
 	unsigned int ctrl_reg = __before_dc_op(cacheop);
 
-	__cache_line_loop(paddr, sz, cacheop);
+	__dcache_line_loop(paddr, sz, cacheop);
 	__after_dc_op(cacheop, ctrl_reg);
 }
 #else
-- 
2.14.3