[U-Boot-Users] [PATCH 8/8] [SH] SuperH support
Nobuhiro Iwamatsu
iwamatsu at nigauri.org
Sun May 6 22:14:55 CEST 2007
Hi, all.
I wrote the code in which u-boot was supported for SH [0].
I am maintaining SH-IPL+g[1] that is the boot loader only for SH now.
However, I think that I will maintain u-boot in the future.
Now,
0. SDRAM controler
1. Internal serial device
2. Flash
3. Timer
working.
I plan to adopt it as a boot loader of the main in the future though
only several boards are supported now.
Please apply this patch .
regards,
Nobuhiro
[0] : http://america.renesas.com/fmwk.jsp?cnt=superh_family_landing.jsp&fp=/products/mpumcu/superh_family
[1] : http://git.nigauri.org
--
Nobuhiro Iwamatsu
E-Mail : iwamatsu at nigauri.org
GPG ID : 3170EBE9
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu at nigauri.org>
diff --git a/include/asm-sh/u-boot.h b/include/asm-sh/u-boot.h
new file mode 100644
index 0000000..c74e97c
--- /dev/null
+++ b/include/asm-sh/u-boot.h
@@ -0,0 +1,44 @@
+/*
+ * 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
+ *
+ ********************************************************************
+ * NOTE: This header file defines an interface to U-Boot. Including
+ * this (unmodified) header file in another file is considered normal
+ * use of U-Boot, and does *not* fall under the heading of "derived
+ * work".
+ ********************************************************************
+ */
+
+#ifndef __ASM_SH_U_BOOT_H_
+#define __ASM_SH_U_BOOT_H_
+
+
+typedef struct bd_info {
+ unsigned long bi_memstart; /* start of DRAM memory */
+ unsigned long bi_memsize; /* size of DRAM memory in bytes */
+ unsigned long bi_flashstart; /* start of FLASH memory */
+ unsigned long bi_flashsize; /* size of FLASH memory */
+ unsigned long bi_flashoffset; /* reserved area for startup monitor */
+ unsigned long bi_sramstart; /* start of SRAM memory */
+ unsigned long bi_sramsize; /* size of SRAM memory */
+ unsigned long bi_ip_addr; /* IP Address */
+ unsigned char bi_enetaddr[6]; /* Ethernet adress */
+ unsigned long bi_baudrate; /* Console Baudrate */
+ unsigned long bi_boot_params; /* where this board expects params */
+} bd_t;
+
+#endif
+
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 at 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..a5347e3
--- /dev/null
+++ b/lib_sh/board.c
@@ -0,0 +1,163 @@
+/*
+ * Copyright (C) 2007
+ * Nobuhiro Iwamatsu <iwamatsu at 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 at 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 at 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;
+}
+
More information about the U-Boot
mailing list