* Patch by Yasushi Shoji, 07 Apr 2004:

[oweals/u-boot.git] / lib_microblaze / board.c

diff --git a/lib_microblaze/board.c b/lib_microblaze/board.c
new file mode 100644 (file)
index 0000000..3e3fb37
--- /dev/null
+++ b/lib_microblaze/board.c
@@ -0,0 +1,76 @@
+/*
+ * (C) Copyright 2004 Atmark Techno, Inc.
+ *
+ * Yasushi SHOJI <yashi@atmark-techno.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 <common.h>
+#include <command.h>
+#include <malloc.h>
+#include <version.h>
+
+const char version_string[] =
+       U_BOOT_VERSION" (" __DATE__ " - " __TIME__ ")";
+
+/*
+ * Begin and End of memory area for malloc(), and current "brk"
+ */
+static ulong mem_malloc_start;
+static ulong mem_malloc_end;
+static ulong mem_malloc_brk;
+
+
+void *sbrk (ptrdiff_t increment)
+{
+       ulong old = mem_malloc_brk;
+       ulong new = old + increment;
+
+       if ((new < mem_malloc_start) || (new > mem_malloc_end)) {
+               return (NULL);
+       }
+       mem_malloc_brk = new;
+       return ((void *) old);
+}
+
+/*
+ * All attempts to come up with a "common" initialization sequence
+ * that works for all boards and architectures failed: some of the
+ * requirements are just _too_ different. To get rid of the resulting
+ * mess of board dependend #ifdef'ed code we now make the whole
+ * initialization sequence configurable to the user.
+ *
+ * The requirements for any new initalization function is simple: it
+ * receives a pointer to the "global data" structure as it's only
+ * argument, and returns an integer return code, where 0 means
+ * "continue" and != 0 means "fatal error, hang the system".
+ */
+typedef int (init_fnc_t) (void);
+
+init_fnc_t *init_sequence[] = {
+       serial_init,            /* serial communications setup */
+       NULL,
+};
+
+void hang (void)
+{
+       puts ("### ERROR ### Please RESET the board ###\n");
+       for (;;);
+}