Add ARM946E cpu and core module targets; remap memory to 0x00000000

Patch by Peter Pearse, 2 Feb 2005

4 files changed, 181 insertions, 1 deletions

diff --git a/board/integratorap/Makefile b/board/integratorap/Makefile
index 00336aa..154d1af 100644
--- a/board/integratorap/Makefile
+++ b/board/integratorap/Makefile
@@ -30,7 +30,7 @@ include $(TOPDIR)/config.mk
 LIB	= lib$(BOARD).a
 
 OBJS	:= integratorap.o flash.o
-SOBJS	:= platform.o
+SOBJS	:= platform.o memsetup.o
 
 $(LIB):	$(OBJS) $(SOBJS)
 	$(AR) crv $@ $^
@@ -49,3 +49,4 @@ distclean:	clean
 -include .depend
 
 #########################################################################
+
diff --git a/board/integratorap/integratorap.c b/board/integratorap/integratorap.c
index fb83c82..6140a7a 100644
--- a/board/integratorap/integratorap.c
+++ b/board/integratorap/integratorap.c
@@ -477,3 +477,140 @@ int dram_init (void)
 {
 	return 0;
 }
+
+/* The Integrator/AP timer1 is clocked at 24MHz
+ * can be divided by 16 or 256
+ * and is a 16-bit counter
+ */
+/* U-Boot expects a 32 bit timer running at CFG_HZ*/
+static ulong timestamp;		/* U-Boot ticks since startup         */
+static ulong total_count = 0;	/* Total timer count                  */
+static ulong lastdec;		/* Timer reading at last call         */
+static ulong div_clock   = 256;	/* Divisor applied to the timer clock */
+static ulong div_timer   = 1;	/* Divisor to convert timer reading   
+                                 * change to U-Boot ticks
+                                 */
+/* CFG_HZ = CFG_HZ_CLOCK/(div_clock * div_timer) */
+
+#define TIMER_LOAD_VAL 0x0000FFFFL
+#define READ_TIMER ((*(volatile ulong *)(CFG_TIMERBASE+4)) & 0x0000FFFFL)
+
+/* all function return values in U-Boot ticks i.e. (1/CFG_HZ) sec 
+ *  - unless otherwise stated
+ */
+
+/* starts a counter 
+ * - the Integrator/AP timer issues an interrupt 
+ *   each time it reaches zero 
+ */
+int interrupt_init (void)
+{
+	/* Load timer with initial value */
+	*(volatile ulong *)(CFG_TIMERBASE + 0) = TIMER_LOAD_VAL;
+	/* Set timer to be
+	 * 	enabled           1
+	 * 	free-running      0
+         * 	XX               00
+	 * 	divider 256      10
+         * 	XX               00
+	 */
+	*(volatile ulong *)(CFG_TIMERBASE + 8) = 0x00000088;
+	total_count = 0;
+	/* init the timestamp and lastdec value */
+	reset_timer_masked();
+
+	div_timer  = CFG_HZ_CLOCK / CFG_HZ;
+	div_timer /= div_clock;
+
+	return (0);
+}
+
+/*
+ * timer without interrupts
+ */
+void reset_timer (void)
+{
+	reset_timer_masked ();
+}
+
+ulong get_timer (ulong base_ticks)
+{
+	return get_timer_masked () - base_ticks;
+}
+
+void set_timer (ulong ticks)
+{
+	timestamp = ticks;
+	total_count = ticks * div_timer;
+	reset_timer_masked();
+}
+
+/* delay x useconds */
+void udelay (unsigned long usec)
+{
+	ulong tmo, tmp;
+
+	/* Convert to U-Boot ticks */
+	tmo  = usec * CFG_HZ;
+	tmo /= (1000000L);
+
+	tmp  = get_timer_masked();	/* get current timestamp */
+	tmo += tmp;			/* wake up timestamp     */
+
+	while (get_timer_masked () < tmo)/* loop till event */
+	{
+		/*NOP*/;
+	}
+}
+
+void reset_timer_masked (void)
+{
+	/* reset time */
+	lastdec   = READ_TIMER;	/* capture current decrementer value   */
+	timestamp = 0;		/* start "advancing" time stamp from 0 */
+}
+
+/* converts the timer reading to U-Boot ticks          */
+/* the timestamp is the number of ticks since reset    */
+/* This routine does not detect wraps unless called regularly
+   ASSUMES a call at least every 16 seconds to detect every reload */
+ulong get_timer_masked (void)
+{
+	ulong now = READ_TIMER;		/* current count */
+
+	if(now > lastdec)
+	{
+		/* Must have wrapped */
+		total_count += lastdec + TIMER_LOAD_VAL + 1 - now; 	
+	} else {
+		total_count += lastdec - now;
+	}
+	lastdec   = now;
+	timestamp = total_count/div_timer;
+
+	return timestamp;
+}
+
+/* waits specified delay value and resets timestamp */
+void udelay_masked (unsigned long usec)
+{
+    udelay(usec);
+}
+
+/*
+ * This function is derived from PowerPC code (read timebase as long long).
+ * On ARM it just returns the timer value.
+ */
+unsigned long long get_ticks(void)
+{
+	return get_timer(0);
+}
+
+/*
+ * Return the timebase clock frequency
+ * i.e. how often the timer decrements
+ */
+ulong get_tbclk (void)
+{
+	return CFG_HZ_CLOCK/div_clock;
+}
diff --git a/board/integratorap/memsetup.S b/board/integratorap/memsetup.S
new file mode 100644
index 0000000..bdf6af9
--- /dev/null
+++ b/board/integratorap/memsetup.S
@@ -0,0 +1,30 @@
+/*
+ * Memory setup for integratorAP 
+ *
+ * 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
+ */
+/*
+ * 	Memory setup
+ *      - the reset defaults are assumed sufficient
+ */
+
+.globl memsetup
+memsetup:
+	mov	pc,lr
+
diff --git a/board/integratorap/platform.S b/board/integratorap/platform.S
index 480e040..e9b0717 100644
--- a/board/integratorap/platform.S
+++ b/board/integratorap/platform.S
@@ -31,3 +31,15 @@ platformsetup:
 
 	/* All done by Integrator's boot monitor! */
 	mov pc, lr
+
+	/* Reset using CM control register */
+.global reset_cpu
+reset_cpu:
+	mov	r0, #CM_BASE
+	ldr	r1,[r0,#OS_CTRL]
+	orr	r1,r1,#CMMASK_RESET
+	str	r1,[r0]
+
+reset_failed:
+	b	reset_failed
+