1 files changed, 77 insertions, 13 deletions

diff --git a/arch/mips/cpu/mips32/cache.S b/arch/mips/cpu/mips32/cache.S
index 12f656cad..22bd844ea 100644
--- a/arch/mips/cpu/mips32/cache.S
+++ b/arch/mips/cpu/mips32/cache.S
@@ -20,15 +20,6 @@
 
 #define RA		t9
 
-/*
- * 16kB is the maximum size of instruction and data caches on MIPS 4K,
- * 64kB is on 4KE, 24K, 5K, etc. Set bigger size for convenience.
- *
- * Note that the above size is the maximum size of primary cache. U-Boot
- * doesn't have L2 cache support for now.
- */
-#define MIPS_MAX_CACHE_SIZE	0x10000
-
 #define INDEX_BASE	CKSEG0
 
 	.macro	cache_op op addr
@@ -126,12 +117,85 @@ LEAF(mips_init_dcache)
  */
 NESTED(mips_cache_reset, 0, ra)
 	move	RA, ra
-	li	t2, CONFIG_SYS_ICACHE_SIZE
-	li	t3, CONFIG_SYS_DCACHE_SIZE
+
+#if !defined(CONFIG_SYS_ICACHE_SIZE) || !defined(CONFIG_SYS_DCACHE_SIZE) || \
+    !defined(CONFIG_SYS_CACHELINE_SIZE)
+	/* read Config1 for use below */
+	mfc0	t5, CP0_CONFIG, 1
+#endif
+
+#ifdef CONFIG_SYS_CACHELINE_SIZE
+	li	t7, CONFIG_SYS_CACHELINE_SIZE
 	li	t8, CONFIG_SYS_CACHELINE_SIZE
+#else
+	/* Detect I-cache line size. */
+	srl	t8, t5, MIPS_CONF1_IL_SHIFT
+	andi	t8, t8, (MIPS_CONF1_IL >> MIPS_CONF1_IL_SHIFT)
+	beqz	t8, 1f
+	li	t6, 2
+	sllv	t8, t6, t8
 
-	li	v0, MIPS_MAX_CACHE_SIZE
+1:	/* Detect D-cache line size. */
+	srl	t7, t5, MIPS_CONF1_DL_SHIFT
+	andi	t7, t7, (MIPS_CONF1_DL >> MIPS_CONF1_DL_SHIFT)
+	beqz	t7, 1f
+	li	t6, 2
+	sllv	t7, t6, t7
+1:
+#endif
 
+#ifdef CONFIG_SYS_ICACHE_SIZE
+	li	t2, CONFIG_SYS_ICACHE_SIZE
+#else
+	/* Detect I-cache size. */
+	srl	t6, t5, MIPS_CONF1_IS_SHIFT
+	andi	t6, t6, (MIPS_CONF1_IS >> MIPS_CONF1_IS_SHIFT)
+	li	t4, 32
+	xori	t2, t6, 0x7
+	beqz	t2, 1f
+	addi	t6, t6, 1
+	sllv	t4, t4, t6
+1:	/* At this point t4 == I-cache sets. */
+	mul	t2, t4, t8
+	srl	t6, t5, MIPS_CONF1_IA_SHIFT
+	andi	t6, t6, (MIPS_CONF1_IA >> MIPS_CONF1_IA_SHIFT)
+	addi	t6, t6, 1
+	/* At this point t6 == I-cache ways. */
+	mul	t2, t2, t6
+#endif
+
+#ifdef CONFIG_SYS_DCACHE_SIZE
+	li	t3, CONFIG_SYS_DCACHE_SIZE
+#else
+	/* Detect D-cache size. */
+	srl	t6, t5, MIPS_CONF1_DS_SHIFT
+	andi	t6, t6, (MIPS_CONF1_DS >> MIPS_CONF1_DS_SHIFT)
+	li	t4, 32
+	xori	t3, t6, 0x7
+	beqz	t3, 1f
+	addi	t6, t6, 1
+	sllv	t4, t4, t6
+1:	/* At this point t4 == I-cache sets. */
+	mul	t3, t4, t7
+	srl	t6, t5, MIPS_CONF1_DA_SHIFT
+	andi	t6, t6, (MIPS_CONF1_DA >> MIPS_CONF1_DA_SHIFT)
+	addi	t6, t6, 1
+	/* At this point t6 == I-cache ways. */
+	mul	t3, t3, t6
+#endif
+
+	/* Determine the largest L1 cache size */
+#if defined(CONFIG_SYS_ICACHE_SIZE) && defined(CONFIG_SYS_DCACHE_SIZE)
+#if CONFIG_SYS_ICACHE_SIZE > CONFIG_SYS_DCACHE_SIZE
+	li	v0, CONFIG_SYS_ICACHE_SIZE
+#else
+	li	v0, CONFIG_SYS_DCACHE_SIZE
+#endif
+#else
+	move	v0, t2
+	sltu	t1, t2, t3
+	movn	v0, t3, t1
+#endif
 	/*
 	 * Now clear that much memory starting from zero.
 	 */
@@ -163,7 +227,7 @@ NESTED(mips_cache_reset, 0, ra)
 	 * then initialize D-cache.
 	 */
 	move	a1, t3
-	move	a2, t8
+	move	a2, t7
 	PTR_LA	v1, mips_init_dcache
 	jalr	v1