From 05c930e80a27d5caac4ab057a906a075f59635ea Mon Sep 17 00:00:00 2001
From: ralph <ralph@3c298f89-4303-0410-b956-a3cf2f4a3e73>
Date: Tue, 30 Mar 2010 13:56:30 +0000
Subject: [uboot-lantiq] add preliminary AR9 support attention: if caches
 enabled the network is broken attention: the network of the flash image
 doesn't work because of enabled caches

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@20606 3c298f89-4303-0410-b956-a3cf2f4a3e73
---
 .../uboot-lantiq/files/cpu/mips/ar9/ifx_cache.S    | 60 ++++++++++++++++++++++
 1 file changed, 60 insertions(+)
 create mode 100644 package/uboot-lantiq/files/cpu/mips/ar9/ifx_cache.S

(limited to 'package/uboot-lantiq/files/cpu/mips/ar9/ifx_cache.S')

diff --git a/package/uboot-lantiq/files/cpu/mips/ar9/ifx_cache.S b/package/uboot-lantiq/files/cpu/mips/ar9/ifx_cache.S
new file mode 100644
index 000000000..fc482dcd6
--- /dev/null
+++ b/package/uboot-lantiq/files/cpu/mips/ar9/ifx_cache.S
@@ -0,0 +1,60 @@
+
+#define IFX_CACHE_EXTRA_INVALID_TAG						\
+	mtc0	zero, CP0_TAGLO, 1;						\
+	mtc0	zero, CP0_TAGLO, 2;						\
+	mtc0	zero, CP0_TAGLO, 3;						\
+	mtc0	zero, CP0_TAGLO, 4;
+
+#define IFX_CACHE_EXTRA_OPERATION						\
+	/* set WST bit */							\
+	mfc0	a0, CP0_ECC;							\
+	li	a1, ECCF_WST;							\
+	or	a0, a1;								\
+	mtc0	a0, CP0_ECC;							\
+										\
+	li	a0, K0BASE;							\
+	move	a2, t2;		/* icacheSize */				\
+	move	a3, t4;		/* icacheLineSize */				\
+	move	a1, a2;								\
+	icacheop(a0,a1,a2,a3,(Index_Store_Tag_I));				\
+										\
+	/* clear WST bit */							\
+	mfc0	a0, CP0_ECC;							\
+	li	a1, ~ECCF_WST;							\
+	and	a0, a1;								\
+	mtc0	a0, CP0_ECC;							\
+										\
+	/* 1: initialise dcache tags. */					\
+										\
+	/* cache line size */							\
+	li	a2, CFG_CACHELINE_SIZE;						\
+	/* kseg0 mem address */							\
+	li	a1, 0;								\
+	li	a3, CFG_CACHE_SETS * CFG_CACHE_WAYS;				\
+1:										\
+	/* store tag (invalid, not locked) */					\
+	cache 0x8, 0(a1);							\
+	cache 0x9, 0(a1);							\
+										\
+	add	a3, -1;								\
+	bne	a3, zero, 1b;							\
+	add	a1, a2;								\
+										\
+	/* set WST bit */							\
+	mfc0	a0, CP0_ECC;							\
+	li	a1, ECCF_WST;							\
+	or	a0, a1;								\
+	mtc0	a0, CP0_ECC;							\
+										\
+	li	a0, K0BASE;							\
+	move	a2, t3;		/* dcacheSize */				\
+	move	a3, t5;		/* dcacheLineSize */				\
+	move	a1, a2;								\
+	icacheop(a0,a1,a2,a3,(Index_Store_Tag_D));				\
+										\
+	/* clear WST bit */							\
+	mfc0	a0, CP0_ECC;							\
+	li	a1, ~ECCF_WST;							\
+	and	a0, a1;								\
+	mtc0	a0, CP0_ECC;
+
-- 
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