sh: Add support SH3 and SH7720
Signed-off-by: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
CC: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Acked-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/cpu/sh3/Makefile b/cpu/sh3/Makefile
new file mode 100644
index 0000000..7679248
--- /dev/null
+++ b/cpu/sh3/Makefile
@@ -0,0 +1,49 @@
+#
+# (C) Copyright 2000-2006
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# (C) Copyright 2007
+# Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
+#
+# (C) Copyright 2007
+# Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
+#
+# 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/sh3/cache.c b/cpu/sh3/cache.c
new file mode 100644
index 0000000..c294a2b
--- /dev/null
+++ b/cpu/sh3/cache.c
@@ -0,0 +1,112 @@
+/*
+ * (C) Copyright 2007
+ * Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
+ *
+ * (C) Copyright 2007
+ * Nobobuhiro 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/sh3/config.mk b/cpu/sh3/config.mk
new file mode 100644
index 0000000..f2da368
--- /dev/null
+++ b/cpu/sh3/config.mk
@@ -0,0 +1,31 @@
+#
+# (C) Copyright 2000-2004
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# (C) Copyright 2007
+# Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
+#
+# (C) Copyright 2007
+# Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
+#
+# 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 += -m3
+PLATFORM_RELFLAGS += -ffixed-r13
diff --git a/cpu/sh3/cpu.c b/cpu/sh3/cpu.c
new file mode 100644
index 0000000..8261d29
--- /dev/null
+++ b/cpu/sh3/cpu.c
@@ -0,0 +1,84 @@
+/*
+ * (C) Copyright 2007
+ * Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
+ *
+ * (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: SH3\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)
+{
+}
+
+void icache_disable(void)
+{
+}
+
+int icache_status(void)
+{
+ return 0;
+}
+
+void dcache_enable(void)
+{
+}
+
+void dcache_disable(void)
+{
+}
+
+int dcache_status(void)
+{
+ return 0;
+}
diff --git a/cpu/sh3/interrupts.c b/cpu/sh3/interrupts.c
new file mode 100644
index 0000000..55284cc
--- /dev/null
+++ b/cpu/sh3/interrupts.c
@@ -0,0 +1,42 @@
+/*
+ * (C) Copyright 2007
+ * Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
+ *
+ * (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/sh3/start.S b/cpu/sh3/start.S
new file mode 100644
index 0000000..ee0bcdf
--- /dev/null
+++ b/cpu/sh3/start.S
@@ -0,0 +1,77 @@
+/*
+ * (C) Copyright 2007
+ * Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
+ *
+ * (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/sh3/time.c b/cpu/sh3/time.c
new file mode 100644
index 0000000..0c273dd
--- /dev/null
+++ b/cpu/sh3/time.c
@@ -0,0 +1,103 @@
+/*
+ * (C) Copyright 2007
+ * Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
+ *
+ * (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>
+#include <asm/io.h>
+
+#define TMU_MAX_COUNTER (~0UL)
+
+static void tmu_timer_start(unsigned int timer)
+{
+ if (timer > 2)
+ return;
+
+ outb(inb(TSTR) | (1 << timer), TSTR);
+}
+
+static void tmu_timer_stop(unsigned int timer)
+{
+ u8 val = inb(TSTR);
+
+ if (timer > 2)
+ return;
+ outb(val & ~(1 << timer), TSTR);
+}
+
+int timer_init(void)
+{
+ /* Divide clock by 4 */
+ outw(0, TCR0);
+
+ 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 - inl(TCNT0));
+}
+
+unsigned long get_timer(unsigned long base)
+{
+ return ((0 - inl(TCNT0)) - base);
+}
+
+void set_timer(unsigned long t)
+{
+ outl(0 - t, TCNT0);
+}
+
+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/sh3/watchdog.c b/cpu/sh3/watchdog.c
new file mode 100644
index 0000000..92bea74
--- /dev/null
+++ b/cpu/sh3/watchdog.c
@@ -0,0 +1,33 @@
+/*
+ * (C) Copyright 2007
+ * Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
+ *
+ * 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>
+
+int watchdog_init(void)
+{
+ return 0;
+}
+
+void reset_cpu(unsigned long ignored)
+{
+ while (1)
+ ;
+}