[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

3 files changed, 173 insertions, 0 deletions

diff --git a/package/uboot-lantiq/files/cpu/mips/ar9/Makefile b/package/uboot-lantiq/files/cpu/mips/ar9/Makefile
new file mode 100644
index 0000000000..c48d02eaaa
--- /dev/null
+++ b/package/uboot-lantiq/files/cpu/mips/ar9/Makefile
@@ -0,0 +1,46 @@
+#########################################################################
+#
+# (C) Copyright 2000-2006
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# See file CREDITS for list of people who contributed to this
+# project.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+# MA 02111-1307 USA
+#
+
+include $(TOPDIR)/config.mk
+
+LIB	= $(obj)lib$(SOC).a
+
+COBJS	= clock.o
+
+SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
+OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))
+
+all:	$(obj).depend $(LIB)
+
+$(LIB):	$(OBJS)
+	$(AR) $(ARFLAGS) $@ $(OBJS)
+
+#########################################################################
+
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+#########################################################################
diff --git a/package/uboot-lantiq/files/cpu/mips/ar9/clock.c b/package/uboot-lantiq/files/cpu/mips/ar9/clock.c
new file mode 100644
index 0000000000..a8aecb4225
--- /dev/null
+++ b/package/uboot-lantiq/files/cpu/mips/ar9/clock.c
@@ -0,0 +1,67 @@
+/*
+ * (C) Copyright 2003
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <asm/ar9.h>
+
+ulong ifx_get_ddr_hz(void)
+{
+	switch((*AR9_CGU_SYS) & 0x05) {
+		case 0x01: 
+		case 0x05: 
+		return CLOCK_111M;
+	
+		case 0x00: 
+		case 0x04: 
+		return CLOCK_166M;
+	}
+
+	return 0;
+}
+
+ulong ifx_get_cpuclk(void)
+{
+	switch((*AR9_CGU_SYS) & 0x05) {
+		case 0x00: 
+		case 0x01: 
+		return CLOCK_333M;
+
+		case 0x04: 
+		return CLOCK_166M;
+
+		case 0x05: 
+		return CLOCK_111M;
+	}
+
+	return 0;
+}
+
+ulong get_bus_freq(ulong dummy)
+{
+	unsigned int ddr_clock=ifx_get_ddr_hz();
+	if((*AR9_CGU_SYS) & 0x40){
+		return ddr_clock/2;
+	} else {
+		return ddr_clock;
+	}
+}
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 0000000000..fc482dcd61
--- /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;
+