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-rw-r--r--cpu/sh4/Makefile46
-rw-r--r--cpu/sh4/config.mk28
-rw-r--r--cpu/sh4/cpu.c67
-rw-r--r--cpu/sh4/interrupts.c39
-rw-r--r--cpu/sh4/start.S75
-rw-r--r--cpu/sh4/time.c94
-rw-r--r--cpu/sh4/watchdog.c50
7 files changed, 399 insertions, 0 deletions
diff --git a/cpu/sh4/Makefile b/cpu/sh4/Makefile
new file mode 100644
index 0000000..b24a280
--- /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
+
+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/config.mk b/cpu/sh4/config.mk
new file mode 100644
index 0000000..2dc7b91
--- /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..70df45e
--- /dev/null
+++ b/cpu/sh4/cpu.c
@@ -0,0 +1,67 @@
+/*
+ * (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>
+
+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)
+{
+
+}
+
+void icache_disable (void)
+{
+
+}
+
+
+int icache_status (void)
+{
+ return 0;
+}
diff --git a/cpu/sh4/interrupts.c b/cpu/sh4/interrupts.c
new file mode 100644
index 0000000..d310dd2
--- /dev/null
+++ b/cpu/sh4/interrupts.c
@@ -0,0 +1,39 @@
+/*
+ * (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..d88b705
--- /dev/null
+++ b/cpu/sh4/start.S
@@ -0,0 +1,75 @@
+/*
+ * (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..b6e4d02
--- /dev/null
+++ b/cpu/sh4/time.c
@@ -0,0 +1,94 @@
+/*
+ * (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 *) TSTR0) |= (1 << timer);
+}
+
+int timer_init (void)
+{
+ /* Divide clock by 4 */
+ *(volatile u16 *)TCR0 = 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 unsigned int *) TCNT0));
+}
+
+unsigned long get_timer (unsigned long base)
+{
+ unsigned long n =
+ *((volatile unsigned int *)TCNT0) ;
+
+ return ((int)n - base ) < 0 ? ( TMU_MAX_COUNTER - ( base -n )):(n - base );
+}
+
+void set_timer (unsigned long t)
+{
+ *((volatile unsigned int *) TCNT0) = (0 - t);
+}
+
+void reset_timer (void)
+{
+ set_timer (0);
+}
+
+void udelay (unsigned long usec)
+{
+ unsigned int start = get_timer (0);
+ unsigned int end = 0;
+ if (usec > 1000000)
+ end = ((usec/100000) * CFG_HZ) / 10;
+ else if (usec > 1000)
+ end = ((usec/100) * CFG_HZ) / 10000;
+ else
+ end = (usec * CFG_HZ) / 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..e2bc820
--- /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);
+}
+
+
generated by cgit v1.1 at 2024-11-28 09:51:33 +0000