1 files changed, 67 insertions, 6 deletions

diff --git a/arch/mips/cpu/mips32/cpu.c b/arch/mips/cpu/mips32/cpu.c
index 28d5c45683..278865b6ff 100644
--- a/arch/mips/cpu/mips32/cpu.c
+++ b/arch/mips/cpu/mips32/cpu.c
@@ -34,28 +34,89 @@ int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 	return 0;
 }
 
+#ifdef CONFIG_SYS_CACHELINE_SIZE
+
+static inline unsigned long icache_line_size(void)
+{
+	return CONFIG_SYS_CACHELINE_SIZE;
+}
+
+static inline unsigned long dcache_line_size(void)
+{
+	return CONFIG_SYS_CACHELINE_SIZE;
+}
+
+#else /* !CONFIG_SYS_CACHELINE_SIZE */
+
+static inline unsigned long icache_line_size(void)
+{
+	unsigned long conf1, il;
+	conf1 = read_c0_config1();
+	il = (conf1 & MIPS_CONF1_IL) >> MIPS_CONF1_IL_SHIFT;
+	if (!il)
+		return 0;
+	return 2 << il;
+}
+
+static inline unsigned long dcache_line_size(void)
+{
+	unsigned long conf1, dl;
+	conf1 = read_c0_config1();
+	dl = (conf1 & MIPS_CONF1_DL) >> MIPS_CONF1_DL_SHIFT;
+	if (!dl)
+		return 0;
+	return 2 << dl;
+}
+
+#endif /* !CONFIG_SYS_CACHELINE_SIZE */
+
 void flush_cache(ulong start_addr, ulong size)
 {
-	unsigned long lsize = CONFIG_SYS_CACHELINE_SIZE;
-	unsigned long addr = start_addr & ~(lsize - 1);
-	unsigned long aend = (start_addr + size - 1) & ~(lsize - 1);
+	unsigned long ilsize = icache_line_size();
+	unsigned long dlsize = dcache_line_size();
+	unsigned long addr, aend;
 
 	/* aend will be miscalculated when size is zero, so we return here */
 	if (size == 0)
 		return;
 
+	addr = start_addr & ~(dlsize - 1);
+	aend = (start_addr + size - 1) & ~(dlsize - 1);
+
+	if (ilsize == dlsize) {
+		/* flush I-cache & D-cache simultaneously */
+		while (1) {
+			cache_op(HIT_WRITEBACK_INV_D, addr);
+			cache_op(HIT_INVALIDATE_I, addr);
+			if (addr == aend)
+				break;
+			addr += dlsize;
+		}
+		return;
+	}
+
+	/* flush D-cache */
 	while (1) {
 		cache_op(HIT_WRITEBACK_INV_D, addr);
+		if (addr == aend)
+			break;
+		addr += dlsize;
+	}
+
+	/* flush I-cache */
+	addr = start_addr & ~(ilsize - 1);
+	aend = (start_addr + size - 1) & ~(ilsize - 1);
+	while (1) {
 		cache_op(HIT_INVALIDATE_I, addr);
 		if (addr == aend)
 			break;
-		addr += lsize;
+		addr += ilsize;
 	}
 }
 
 void flush_dcache_range(ulong start_addr, ulong stop)
 {
-	unsigned long lsize = CONFIG_SYS_CACHELINE_SIZE;
+	unsigned long lsize = dcache_line_size();
 	unsigned long addr = start_addr & ~(lsize - 1);
 	unsigned long aend = (stop - 1) & ~(lsize - 1);
 
@@ -69,7 +130,7 @@ void flush_dcache_range(ulong start_addr, ulong stop)
 
 void invalidate_dcache_range(ulong start_addr, ulong stop)
 {
-	unsigned long lsize = CONFIG_SYS_CACHELINE_SIZE;
+	unsigned long lsize = dcache_line_size();
 	unsigned long addr = start_addr & ~(lsize - 1);
 	unsigned long aend = (stop - 1) & ~(lsize - 1);