sh: First support code of SuperH.

Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>

4 files changed, 355 insertions, 0 deletions

diff --git a/lib_sh/Makefile b/lib_sh/Makefile
new file mode 100644
index 0000000..c84276a
--- /dev/null
+++ b/lib_sh/Makefile
@@ -0,0 +1,42 @@
+#
+# Copyright (c) 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 $(TOPDIR)/config.mk
+
+LIB	= $(obj)lib$(ARCH).a
+
+SOBJS	= 
+
+COBJS	= board.o sh_linux.o # time.o
+
+SRCS 	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
+OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))
+
+$(LIB):	$(obj).depend $(OBJS)
+	$(AR) $(ARFLAGS) $@ $(OBJS)
+
+#########################################################################
+
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+#########################################################################
diff --git a/lib_sh/board.c b/lib_sh/board.c
new file mode 100644
index 0000000..c3f8462
--- /dev/null
+++ b/lib_sh/board.c
@@ -0,0 +1,163 @@
+/*
+ * Copyright (C) 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 <common.h>
+#include <command.h>
+#include <malloc.h>
+#include <devices.h>
+#include <version.h>
+#include <net.h>
+#include <environment.h>
+
+extern void malloc_bin_reloc (void);
+extern int cpu_init(void);
+extern int board_init(void);
+extern int dram_init(void);
+extern int watchdog_init(void);
+extern int timer_init(void);
+
+const char version_string[] = U_BOOT_VERSION" (" __DATE__ " - " __TIME__ ")";
+
+unsigned long monitor_flash_len = CFG_MONITOR_LEN;
+
+static unsigned long mem_malloc_start;
+static unsigned long mem_malloc_end;
+static unsigned long mem_malloc_brk;
+
+static void mem_malloc_init (void)
+{
+
+	mem_malloc_start = (TEXT_BASE - CFG_GBL_DATA_SIZE - CFG_MALLOC_LEN);
+	mem_malloc_end = (mem_malloc_start + CFG_MALLOC_LEN - 16);
+	mem_malloc_brk = mem_malloc_start;
+	memset ((void *) mem_malloc_start, 0, 
+		(mem_malloc_end - mem_malloc_start));
+}
+
+void *sbrk (ptrdiff_t increment)
+{
+	unsigned long old = mem_malloc_brk;
+	unsigned long new = old + increment;
+
+	if ((new < mem_malloc_start) ||
+	    (new > mem_malloc_end)) {
+		return NULL;
+	}
+
+	mem_malloc_brk = new;
+	return (void *) old;
+}
+
+typedef int (init_fnc_t) (void);
+
+init_fnc_t *init_sequence[] =
+{
+	cpu_init,		/* basic cpu dependent setup */
+	board_init,		/* basic board dependent setup */
+	interrupt_init,		/* set up exceptions */
+	env_init,		/* event init */
+	serial_init,		/* SCIF init */
+	watchdog_init,
+	console_init_f,
+	display_options,
+	checkcpu,
+	checkboard,
+	dram_init,		/* SDRAM init */
+	NULL			/* Terminate this list */
+};
+
+void sh_generic_init (void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+	bd_t *bd;
+	init_fnc_t **init_fnc_ptr;
+	char *s, *e;
+	int i;
+
+	memset (gd, 0, CFG_GBL_DATA_SIZE);
+
+	gd->flags |= GD_FLG_RELOC;	/* tell others: relocation done */
+
+	gd->bd = (bd_t *) (gd + 1);		/* At end of global data */
+	gd->baudrate = CONFIG_BAUDRATE;
+
+	gd->cpu_clk = CONFIG_SYS_CLK_FREQ;
+
+	bd = gd->bd;
+	bd->bi_memstart	= CFG_SDRAM_BASE;
+	bd->bi_memsize = CFG_SDRAM_SIZE;
+	bd->bi_flashstart = CFG_FLASH_BASE;
+#if defined(CFG_SRAM_BASE) && defined(CFG_SRAM_SIZE)
+	bd->bi_sramstart= CFG_SRAM_BASE;
+	bd->bi_sramsize	= CFG_SRAM_SIZE;
+#endif
+	bd->bi_baudrate	= CONFIG_BAUDRATE;
+
+	for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
+		if ((*init_fnc_ptr) () != 0) {
+			hang();
+		}
+	}
+	
+	timer_init();
+	
+	/* flash_init need timer_init().(TMU) */
+	bd->bi_flashsize = flash_init();
+	printf("FLASH: %dMB\n", bd->bi_flashsize / (1024*1024));
+
+	mem_malloc_init();
+	malloc_bin_reloc();
+	env_relocate();
+
+#if  (CONFIG_COMMANDS & CFG_CMD_NET)
+	bd->bi_ip_addr = getenv_IPaddr ("ipaddr");
+	s = getenv ("ethaddr");
+	for (i = 0; i < 6; ++i) {
+		bd->bi_enetaddr[i] = s ? simple_strtoul (s, &e, 16) : 0;
+		if (s) s = (*e) ? e + 1 : e;
+	}
+#endif
+	devices_init();
+	jumptable_init();
+	console_init_r();
+	interrupt_init();
+#ifdef BOARD_LATE_INIT
+	board_late_init ();
+#endif
+#if (CONFIG_COMMANDS & CFG_CMD_NET)
+#if defined(CONFIG_NET_MULTI)
+	puts ("Net:   ");
+#endif
+	eth_initialize(gd->bd);
+#endif
+	while (1) {
+		main_loop();
+	}
+}
+
+
+/***********************************************************************/
+
+void hang (void)
+{
+	puts ("Board ERROR \n");
+	for (;;);
+}
diff --git a/lib_sh/sh_linux.c b/lib_sh/sh_linux.c
new file mode 100644
index 0000000..7237ab3
--- /dev/null
+++ b/lib_sh/sh_linux.c
@@ -0,0 +1,74 @@
+/*
+ * (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 <command.h>
+#include <asm/byteorder.h>
+
+extern image_header_t header;	/* common/cmd_bootm.c */
+
+/* The SH kernel reads arguments from the empty zero page at location
+ * 0 at the start of SDRAM. The following are copied from 
+ * arch/sh/kernel/setup.c and may require tweaking if the kernel sources
+ * change.
+ */
+#define PARAM   ((unsigned char *)CFG_SDRAM_BASE + 0x1000)
+
+#define MOUNT_ROOT_RDONLY (*(unsigned long *) (PARAM+0x000))
+#define RAMDISK_FLAGS (*(unsigned long *) (PARAM+0x004))
+#define ORIG_ROOT_DEV (*(unsigned long *) (PARAM+0x008))
+#define LOADER_TYPE (*(unsigned long *) (PARAM+0x00c))
+#define INITRD_START (*(unsigned long *) (PARAM+0x010))
+#define INITRD_SIZE (*(unsigned long *) (PARAM+0x014))
+/* ... */
+#define COMMAND_LINE ((char *) (PARAM+0x100))
+
+#define RAMDISK_IMAGE_START_MASK        0x07FF
+
+#ifdef CFG_DEBUG
+static void hexdump (unsigned char *buf, int len)
+{
+	int i;
+
+	for (i = 0; i < len; i++) {
+		if ((i % 16) == 0)
+			printf ("%s%08x: ", i ? "\n" : "", (unsigned int) &buf[i]);
+		printf ("%02x ", buf[i]);
+	}
+	printf ("\n");
+}
+#endif
+
+void do_bootm_linux (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
+		     ulong addr, ulong *len_ptr, int verify)
+{
+	image_header_t *hdr = &header;
+	char *bootargs = getenv("bootargs");
+	void (*kernel) (void) = (void (*)(void)) ntohl (hdr->ih_ep);
+
+	/* Setup parameters */
+	memset(PARAM, 0, 0x1000);	/* Clear zero page */
+	strcpy(COMMAND_LINE, bootargs);
+	kernel();
+}
+
diff --git a/lib_sh/time.c b/lib_sh/time.c
new file mode 100644
index 0000000..3620136
--- /dev/null
+++ b/lib_sh/time.c
@@ -0,0 +1,76 @@
+/*
+ * Copyright (c) 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 <asm/processer.h>
+
+static void tmu_timer_start (unsigned int timer)
+{
+	if (timer > 2)
+		return;
+
+	*((volatile unsigned char *) TSTR0) |= (1 << timer);
+}
+
+int timer_init (void)
+{
+	*(volatile u16 *)TCR0 = 0;
+
+	tmu_timer_start (0);
+	return 0;
+}
+
+unsigned long long get_ticks (void)
+{
+	return (0 - *((volatile unsigned int *) TCNT0));
+}
+
+unsigned long get_timer (unsigned long base)
+{
+	return ((0 - *((volatile unsigned int *) TCNT0)) - 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 = start + (usec * ((CFG_HZ + 500000) / 1000000));
+
+	while (get_timer (0) < end)
+		continue;
+}
+
+unsigned long get_tbclk (void)
+{
+	return CFG_HZ;
+}
+