ARCv2: MMUv4: support aliasing icache config

This is also default for AXS103 release

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

2 files changed, 14 insertions, 4 deletions

diff --git a/arch/arc/include/asm/cache.h b/arch/arc/include/asm/cache.h
index e54977a7d006..d21c76d6b054 100644
--- a/arch/arc/include/asm/cache.h
+++ b/arch/arc/include/asm/cache.h
@@ -60,7 +60,7 @@ extern void read_decode_cache_bcr(void);
 #define ARC_REG_IC_IVIC         0x10
 #define ARC_REG_IC_CTRL         0x11
 #define ARC_REG_IC_IVIL         0x19
-#if defined(CONFIG_ARC_MMU_V3)
+#if defined(CONFIG_ARC_MMU_V3) || defined(CONFIG_ARC_MMU_V4)
 #define ARC_REG_IC_PTAG         0x1E
 #endif
 
@@ -74,9 +74,7 @@ extern void read_decode_cache_bcr(void);
 #define ARC_REG_DC_IVDL         0x4A
 #define ARC_REG_DC_FLSH         0x4B
 #define ARC_REG_DC_FLDL         0x4C
-#if defined(CONFIG_ARC_MMU_V3)
 #define ARC_REG_DC_PTAG         0x5C
-#endif
 
 /* Bit val in DC_CTRL */
 #define DC_CTRL_INV_MODE_FLUSH  0x40
diff --git a/arch/arc/mm/cache.c b/arch/arc/mm/cache.c
index 7a898f57d84b..0eaaee60fd0b 100644
--- a/arch/arc/mm/cache.c
+++ b/arch/arc/mm/cache.c
@@ -21,6 +21,9 @@
 #include <asm/cachectl.h>
 #include <asm/setup.h>
 
+void (*_cache_line_loop_ic_fn)(unsigned long paddr, unsigned long vaddr,
+                               unsigned long sz, const int cacheop);
+
 char *arc_cache_mumbojumbo(int c, char *buf, int len)
 {
         int n = 0;
@@ -414,7 +417,7 @@ __ic_line_inv_vaddr_local(unsigned long paddr, unsigned long vaddr,
         unsigned long flags;
 
         local_irq_save(flags);
-        __cache_line_loop(paddr, vaddr, sz, OP_INV_IC);
+        (*_cache_line_loop_ic_fn)(paddr, vaddr, sz, OP_INV_IC);
         local_irq_restore(flags);
 }
 
@@ -746,6 +749,15 @@ void arc_cache_init(void)
                 if (ic->ver != CONFIG_ARC_MMU_VER)
                         panic("Cache ver [%d] doesn't match MMU ver [%d]\n",
                               ic->ver, CONFIG_ARC_MMU_VER);
+
+                /*
+                 * In MMU v4 (HS38x) the alising icache config uses IVIL/PTAG
+                 * pair to provide vaddr/paddr respectively, just as in MMU v3
+                 */
+                if (is_isa_arcv2() && ic->alias)
+                        _cache_line_loop_ic_fn = __cache_line_loop_v3;
+                else
+                        _cache_line_loop_ic_fn = __cache_line_loop;
         }
 
         if (IS_ENABLED(CONFIG_ARC_HAS_DCACHE)) {