8 files changed, 525 insertions, 0 deletions
diff --git a/cpu/sh4/Makefile b/cpu/sh4/Makefile
new file mode 100644
index 0000000..1bb8bd7
--- /dev/null
+++ b/cpu/sh4/Makefile
@@ -0,0 +1,46 @@
+#
+# (C) Copyright 2000-2006
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# (C) Copyright 2007
+# Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
+#
+# 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	= $(obj)lib$(CPU).a
+
+START	= start.o
+OBJS	= cpu.o interrupts.o watchdog.o time.o cache.o
+
+all:	.depend $(START) $(LIB)
+
+$(LIB):	$(OBJS)
+	$(AR) crv $@ $(OBJS)
+
+#########################################################################
+
+.depend:	Makefile $(START:.o=.S) $(OBJS:.o=.c)
+		$(CC) -M $(CFLAGS) $(START:.o=.S) $(OBJS:.o=.c) > $@
+
+sinclude .depend
+
+#########################################################################
diff --git a/cpu/sh4/cache.c b/cpu/sh4/cache.c
new file mode 100644
index 0000000..4e744d7
--- /dev/null
+++ b/cpu/sh4/cache.c
@@ -0,0 +1,108 @@
+/*
+ * (C) Copyright 2007
+ * Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
+ *
+ * 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 <command.h>
+#include <asm/processor.h>
+#include <asm/io.h>
+
+/*
+ * Jump to P2 area.
+ * When handling TLB or caches, we need to do it from P2 area.
+ */
+#define jump_to_P2()			\
+  do {					\
+    unsigned long __dummy;		\
+    __asm__ __volatile__(		\
+		"mov.l	1f, %0\n\t"	\
+		"or	%1, %0\n\t"	\
+		"jmp	@%0\n\t"	\
+		" nop\n\t"		\
+		".balign 4\n"		\
+		"1:	.long 2f\n"	\
+		"2:"			\
+		: "=&r" (__dummy)	\
+		: "r" (0x20000000));	\
+  } while (0)
+
+/*
+ * Back to P1 area.
+ */
+#define back_to_P1()					\
+  do {							\
+    unsigned long __dummy;				\
+    __asm__ __volatile__(				\
+		"nop;nop;nop;nop;nop;nop;nop\n\t"	\
+		"mov.l	1f, %0\n\t"			\
+		"jmp	@%0\n\t"			\
+		" nop\n\t"				\
+		".balign 4\n"				\
+		"1:	.long 2f\n"			\
+		"2:"					\
+		: "=&r" (__dummy));			\
+  } while (0)
+
+#define CACHE_VALID       1
+#define CACHE_UPDATED     2
+
+static inline void cache_wback_all(void)
+{
+	unsigned long addr, data, i, j;
+
+	jump_to_P2();
+	for (i = 0; i < CACHE_OC_NUM_ENTRIES; i++){
+		for (j = 0; j < CACHE_OC_NUM_WAYS; j++) {
+      			addr = CACHE_OC_ADDRESS_ARRAY | (j << CACHE_OC_WAY_SHIFT)
+				| (i << CACHE_OC_ENTRY_SHIFT);
+      			data = inl(addr);
+			if (data & CACHE_UPDATED) {
+				data &= ~CACHE_UPDATED;
+				outl(data, addr);
+			}
+		}
+	}
+	back_to_P1();
+}
+
+
+#define CACHE_ENABLE      0
+#define CACHE_DISABLE     1
+
+int cache_control(unsigned int cmd)
+{
+	unsigned long ccr;
+
+	jump_to_P2();
+	ccr = inl(CCR);
+
+	if (ccr & CCR_CACHE_ENABLE)
+		cache_wback_all();
+
+	if (cmd == CACHE_DISABLE)
+		outl(CCR_CACHE_STOP, CCR);
+	else
+		outl(CCR_CACHE_INIT, CCR);
+	back_to_P1();
+
+	return 0;
+}
diff --git a/cpu/sh4/config.mk b/cpu/sh4/config.mk
new file mode 100644
index 0000000..b3feb2a
--- /dev/null
+++ b/cpu/sh4/config.mk
@@ -0,0 +1,28 @@
+#
+# (C) Copyright 2000-2004
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# (C) Copyright 2007
+# Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
+#
+# 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
+#
+#
+PLATFORM_CPPFLAGS += -m4-nofpu
+PLATFORM_RELFLAGS += -ffixed-r13
diff --git a/cpu/sh4/cpu.c b/cpu/sh4/cpu.c
new file mode 100644
index 0000000..0ebf951
--- /dev/null
+++ b/cpu/sh4/cpu.c
@@ -0,0 +1,83 @@
+/*
+ * (C) Copyright 2007
+ * Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
+ *
+ * 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 <command.h>
+#include <asm/processor.h>
+
+int checkcpu(void)
+{
+	puts("CPU: SH4\n");
+	return 0;
+}
+
+int cpu_init (void)
+{
+	return 0;
+}
+
+int cleanup_before_linux (void)
+{
+	disable_interrupts();
+	return 0;
+}
+
+int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+	disable_interrupts();
+	reset_cpu (0);
+	return 0;
+}
+
+void flush_cache (unsigned long addr, unsigned long size)
+{
+
+}
+
+void icache_enable (void)
+{
+	cache_control(0);
+}
+
+void icache_disable (void)
+{
+	cache_control(1);
+}
+
+int icache_status (void)
+{
+	return 0;
+}
+
+void dcache_enable (void)
+{
+}
+
+void dcache_disable (void)
+{
+}
+
+int dcache_status (void)
+{
+	return 0;
+}
diff --git a/cpu/sh4/interrupts.c b/cpu/sh4/interrupts.c
new file mode 100644
index 0000000..6988ecc
--- /dev/null
+++ b/cpu/sh4/interrupts.c
@@ -0,0 +1,38 @@
+/*
+ * (C) Copyright 2007
+ * Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
+ *
+ * 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>
+
+int interrupt_init (void)
+{
+	return 0;
+}
+
+void enable_interrupts (void)
+{
+
+}
+
+int disable_interrupts (void){
+	return 0;
+}
diff --git a/cpu/sh4/start.S b/cpu/sh4/start.S
new file mode 100644
index 0000000..a68ebb8
--- /dev/null
+++ b/cpu/sh4/start.S
@@ -0,0 +1,74 @@
+/*
+ * (C) Copyright 2007
+ * Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
+ *
+ * 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 <config.h>
+#include <version.h>
+
+	.text
+	.align	2
+
+	.global	_start
+_start:
+	mov.l	._lowlevel_init, r0
+100:	bsrf	r0
+	nop
+
+	bsr	1f
+	nop
+1:	sts	pr, r5
+	mov.l	._reloc_dst, r4
+	add	#(_start-1b), r5
+	mov.l	._reloc_dst_end, r6
+
+2:	mov.l	@r5+, r1
+	mov.l	r1, @r4
+	add	#4, r4
+	cmp/hs	r6, r4
+	bf	2b
+
+	mov.l	._bss_start, r4
+	mov.l	._bss_end, r5
+	mov	#0, r1
+
+3:	mov.l	r1, @r4			/* bss clear */
+	add	#4, r4
+	cmp/hs	r5, r4
+	bf	3b
+
+	mov.l	._gd_init, r13		/* global data */
+	mov.l	._stack_init, r15	/* stack */
+
+	mov.l	._sh_generic_init, r0
+	jsr	@r0
+	nop
+
+loop:
+	bra	loop
+
+	.align	2
+
+._lowlevel_init:	.long	(lowlevel_init - (100b + 4))
+._reloc_dst:		.long	reloc_dst
+._reloc_dst_end:	.long	reloc_dst_end
+._bss_start:		.long	bss_start
+._bss_end:		.long	bss_end
+._gd_init:		.long	(_start - CFG_GBL_DATA_SIZE)
+._stack_init:		.long	(_start - CFG_GBL_DATA_SIZE - CFG_MALLOC_LEN - 16)
+._sh_generic_init:	.long	sh_generic_init
diff --git a/cpu/sh4/time.c b/cpu/sh4/time.c
new file mode 100644
index 0000000..5f8a3a0
--- /dev/null
+++ b/cpu/sh4/time.c
@@ -0,0 +1,98 @@
+/*
+ * (C) Copyright 2007
+ * Nobobuhiro Iwamatsu <iwamatsu@nigauri.org>
+ *
+ * (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/processor.h>
+
+#define TMU_MAX_COUNTER (~0UL)
+
+static void tmu_timer_start (unsigned int timer)
+{
+	if (timer > 2)
+		return;
+
+	*((volatile unsigned char *) TSTR) |= (1 << timer);
+}
+
+static void tmu_timer_stop (unsigned int timer)
+{
+	u8 val = *((volatile u8 *)TSTR);
+	if (timer > 2)
+		return;
+	*((volatile unsigned char *)TSTR) = val &~(1 << timer);
+}
+
+int timer_init (void)
+{
+	/* Divide clock by 4 */
+	*(volatile u16 *)TCR0 = 0;
+
+	tmu_timer_stop(0);
+	tmu_timer_start(0);
+	return 0;
+}
+
+/*
+   In theory we should return a true 64bit value (ie something that doesn't
+   overflow). However, we don't. Therefore if TMU runs at fastest rate of
+   6.75 MHz this value will wrap after u-boot has been running for approx
+   10 minutes.
+*/
+unsigned long long get_ticks (void)
+{
+	return (0 - *((volatile u32 *) TCNT0));
+}
+
+unsigned long get_timer (unsigned long base)
+{
+	return ((0 - *((volatile u32 *) TCNT0)) - base);
+}
+
+void set_timer (unsigned long t)
+{
+	*((volatile unsigned int *) TCNT0) = (0 - t);
+}
+
+void reset_timer (void)
+{
+	tmu_timer_stop(0);
+	set_timer (0);
+	tmu_timer_start(0);
+}
+
+void udelay (unsigned long usec)
+{
+	unsigned int start = get_timer (0);
+	unsigned int end = start + (usec * ((CFG_HZ + 500000) / 1000000));
+
+	while (get_timer (0) < end)
+		continue;
+}
+
+unsigned long get_tbclk (void)
+{
+	return CFG_HZ;
+}
diff --git a/cpu/sh4/watchdog.c b/cpu/sh4/watchdog.c
new file mode 100644
index 0000000..346e217
--- /dev/null
+++ b/cpu/sh4/watchdog.c
@@ -0,0 +1,50 @@
+/*
+ * 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/processor.h>
+
+#define WDT_BASE	WTCNT
+
+static unsigned char cnt_read (void){
+	return *((volatile unsigned char *)(WDT_BASE + 0x00));
+}
+
+static unsigned char csr_read (void){
+	return *((volatile unsigned char *)(WDT_BASE + 0x04));
+}
+
+static void cnt_write (unsigned char value){
+	while (csr_read() & (1 << 5)) {
+		/* delay */
+	}
+	*((volatile unsigned short *)(WDT_BASE + 0x00))
+		= ((unsigned short) value) | 0x5A00;
+}
+
+static void csr_write (unsigned char value){
+	*((volatile unsigned short *)(WDT_BASE + 0x04))
+		= ((unsigned short) value) | 0xA500;
+}
+
+
+int watchdog_init (void){ return 0; }
+
+void reset_cpu (unsigned long ignored)
+{
+	while(1);
+}