* Patch by Scott McNutt, 04 Oct 2003:
- add support for Altera Nios-32 CPU
- add support for Nios Cyclone Development Kit (DK-1C20)
* Patch by Steven Scholz, 29 Sep 2003:
- A second parameter for bootm overwrites the load address for
"Standalone Application" images.
- bootm sets environment variable "filesize" to the resulting
(uncompressed) data length for "Standalone Application" images
when autostart is set to "no". Now you can do something like
if bootm $fpgadata $some_free_ram ; then
fpga load 0 $some_free_ram $filesize
fi
* Patch by Denis Peter, 25 Sept 2003:
add support for the MIP405 Rev. C board
diff --git a/lib_nios/board.c b/lib_nios/board.c
new file mode 100644
index 0000000..c81c001
--- /dev/null
+++ b/lib_nios/board.c
@@ -0,0 +1,166 @@
+/*
+ * (C) Copyright 2003, Psyent Corporation <www.psyent.com>
+ * Scott McNutt <smcnutt@psyent.com>
+ *
+ * (C) Copyright 2000-2002
+ * 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 <devices.h>
+#include <watchdog.h>
+
+
+/*
+ * 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".
+ */
+
+
+extern void malloc_bin_reloc (void);
+typedef int (init_fnc_t) (void);
+extern unsigned _vectors[];
+
+/*
+ * Begin and End of memory area for malloc(), and current "brk"
+ */
+static ulong mem_malloc_start = 0;
+static ulong mem_malloc_end = 0;
+static ulong mem_malloc_brk = 0;
+
+/*
+ * The Malloc area is immediately below the monitor copy in RAM
+ */
+static void mem_malloc_init (void)
+{
+ mem_malloc_start = CFG_MALLOC_BASE;
+ mem_malloc_end = mem_malloc_start + CFG_MALLOC_LEN;
+ mem_malloc_brk = mem_malloc_start;
+ memset ((void *) mem_malloc_start,
+ 0,
+ mem_malloc_end - mem_malloc_start);
+}
+
+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);
+}
+
+
+/************************************************************************
+ * Initialization sequence *
+ ***********************************************************************/
+
+init_fnc_t *init_sequence[] = {
+
+#if defined(CONFIG_BOARD_PRE_INIT)
+ board_pre_init, /* Call board-specific init code early.*/
+#endif
+
+ env_init,
+ serial_init,
+ console_init_f,
+ display_options,
+ checkcpu,
+ checkboard,
+ NULL, /* Terminate this list */
+};
+
+
+/***********************************************************************/
+void board_init (void)
+{
+ DECLARE_GLOBAL_DATA_PTR;
+
+ bd_t *bd;
+ init_fnc_t **init_fnc_ptr;
+
+ /* Pointer is writable since we allocated a register for it.
+ * Nios treats CFG_GBL_DATA_OFFSET as an address.
+ */
+ gd = (gd_t *)CFG_GBL_DATA_OFFSET;
+ memset( gd, 0, CFG_GBL_DATA_SIZE );
+
+ /* Copy exception vectors to the correct location.
+ */
+ memcpy( (void *)CFG_VECT_BASE, _vectors, 256 );
+
+ 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;
+ bd->bi_sramstart= CFG_SRAM_BASE;
+ bd->bi_sramsize = CFG_SRAM_SIZE;
+ bd->bi_baudrate = CONFIG_BAUDRATE;
+
+ for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
+ if ((*init_fnc_ptr) () != 0) {
+ hang ();
+ }
+ }
+
+ bd->bi_flashsize = flash_init();
+
+ mem_malloc_init();
+ malloc_bin_reloc();
+ env_relocate();
+
+ devices_init();
+ jumptable_init();
+ console_init_r();
+ /*
+ */
+
+ interrupt_init ();
+ /* main_loop */
+ for (;;) {
+ WATCHDOG_RESET ();
+ main_loop ();
+ }
+}
+
+
+/***********************************************************************/
+
+void hang (void)
+{
+ puts("### ERROR ### Please reset board ###\n");
+ for (;;);
+}