* Add support for MIPS32 4Kc CPUs

* Add support for INCA-IP Board

1 files changed, 403 insertions, 0 deletions

diff --git a/lib_mips/board.c b/lib_mips/board.c
new file mode 100644
index 0000000..81909d3
--- /dev/null
+++ b/lib_mips/board.c
@@ -0,0 +1,403 @@
+/*
+ * (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 <malloc.h>
+#include <devices.h>
+#include <syscall.h>
+#include <version.h>
+#include <net.h>
+#include <environment.h>
+
+#if ( ((CFG_ENV_ADDR+CFG_ENV_SIZE) < CFG_MONITOR_BASE) || \
+      (CFG_ENV_ADDR >= (CFG_MONITOR_BASE + CFG_MONITOR_LEN)) ) || \
+    defined(CFG_ENV_IS_IN_NVRAM)
+#define	TOTAL_MALLOC_LEN	(CFG_MALLOC_LEN + CFG_ENV_SIZE)
+#else
+#define	TOTAL_MALLOC_LEN	CFG_MALLOC_LEN
+#endif
+
+#undef DEBUG
+
+extern int timer_init(void);
+
+const char version_string[] =
+	U_BOOT_VERSION" (" __DATE__ " - " __TIME__ ")";
+
+static char *failed = "*** failed ***\n";
+
+/*
+ * 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;
+
+
+/*
+ * The Malloc area is immediately below the monitor copy in DRAM
+ */
+static void mem_malloc_init (void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+	ulong dest_addr = CFG_MONITOR_BASE + gd->reloc_off;
+
+	mem_malloc_end = dest_addr;
+	mem_malloc_start = dest_addr - TOTAL_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);
+}
+
+
+static int init_func_ram (void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+#ifdef	CONFIG_BOARD_TYPES
+	int board_type = gd->board_type;
+#else
+	int board_type = 0;	/* use dummy arg */
+#endif
+	puts ("DRAM:  ");
+
+	if ((gd->ram_size = initdram (board_type)) > 0) {
+		print_size (gd->ram_size, "\n");
+		return (0);
+	}
+	puts (failed);
+	return (1);
+}
+
+static int display_banner(void)
+{
+
+	printf ("\n\n%s\n\n", version_string);
+	return (0);
+}
+
+static void display_flash_config(ulong size)
+{
+	puts ("Flash: ");
+	print_size (size, "\n");
+}
+
+
+static int init_baudrate (void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+	uchar tmp[64];	/* long enough for environment variables */
+	int i = getenv_r ("baudrate", tmp, sizeof (tmp));
+
+	gd->baudrate = (i > 0)
+			? (int) simple_strtoul (tmp, NULL, 10)
+			: CONFIG_BAUDRATE;
+
+	return (0);
+}
+
+
+/*
+ * Breath some life into the board...
+ *
+ * The first part of initialization is running from Flash memory;
+ * its main purpose is to initialize the RAM so that we
+ * can relocate the monitor code to RAM.
+ */
+
+/*
+ * 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[] = {
+	timer_init,
+	env_init,		/* initialize environment */
+	init_baudrate,		/* initialze baudrate settings */
+	serial_init,		/* serial communications setup */
+	console_init_f,
+	display_banner,		/* say that we are here */
+	init_func_ram,
+	NULL,
+};
+
+
+void board_init_f(ulong bootflag)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+	gd_t gd_data, *id;
+	bd_t *bd;
+	init_fnc_t **init_fnc_ptr;
+	ulong addr, addr_sp, len   = CFG_MONITOR_LEN;
+
+		/* Pointer is writable since we allocated a register for it.
+		 */
+	gd = &gd_data;
+	memset (gd, 0, sizeof (gd_t));
+
+	for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
+		if ((*init_fnc_ptr)() != 0) {
+			hang ();
+		}
+	}
+
+	/*
+	 * Now that we have DRAM mapped and working, we can
+	 * relocate the code and continue running from DRAM.
+	 */
+	addr = CFG_SDRAM_BASE + gd->ram_size;
+
+		/* We can reserve some RAM "on top" here.
+		 */
+
+		/* round down to next 4 kB limit.
+		 */
+	addr &= ~(4096 - 1);
+#ifdef DEBUG
+	printf ("Top of RAM usable for U-Boot at: %08lx\n", addr);
+#endif
+	 
+		/* Reserve memory for U-Boot code, data & bss
+		 * round down to next 4 kB limit
+		 */
+	addr -= len;
+	addr &= ~(4096 - 1);
+
+#ifdef DEBUG
+	printf ("Reserving %ldk for U-Boot at: %08lx\n", len >> 10, addr);
+#endif
+
+	 	/* Reserve memory for malloc() arena.
+		 */
+	addr_sp = addr - TOTAL_MALLOC_LEN;
+#ifdef DEBUG
+	printf ("Reserving %dk for malloc() at: %08lx\n",
+			TOTAL_MALLOC_LEN >> 10, addr_sp);
+#endif
+
+	/*
+	 * (permanently) allocate a Board Info struct
+	 * and a permanent copy of the "global" data
+	 */
+	addr_sp -= sizeof(bd_t);
+	bd = (bd_t *)addr_sp;
+	gd->bd = bd;
+#ifdef DEBUG
+	printf ("Reserving %d Bytes for Board Info at: %08lx\n",
+			sizeof(bd_t), addr_sp);
+#endif
+	addr_sp -= sizeof(gd_t);
+	id = (gd_t *)addr_sp;
+#ifdef DEBUG
+	printf ("Reserving %d Bytes for Global Data at: %08lx\n",
+			sizeof (gd_t), addr_sp);
+#endif
+
+	 	/* Reserve memory for boot params.
+		 */
+	addr_sp -= CFG_BOOTPARAMS_LEN;
+	bd->bi_boot_params = addr_sp;
+#ifdef DEBUG
+	printf ("Reserving %dk for malloc() at: %08lx\n",
+			CFG_BOOTPARAMS_LEN >> 10, addr_sp);
+#endif
+
+	/*
+	 * Finally, we set up a new (bigger) stack.
+	 *
+	 * Leave some safety gap for SP, force alignment on 16 byte boundary
+	 * Clear initial stack frame
+	 */
+	addr_sp -= 16;
+	addr_sp &= ~0xF;
+	*((ulong *) addr_sp)-- = 0;
+	*((ulong *) addr_sp)-- = 0;
+#ifdef DEBUG
+	printf ("Stack Pointer at: %08lx\n", addr_sp);
+#endif
+	/*
+	 * Save local variables to board info struct
+	 */
+	bd->bi_memstart	= CFG_SDRAM_BASE;	/* start of  DRAM memory */
+	bd->bi_memsize	= gd->ram_size;		/* size  of  DRAM memory in bytes */
+	bd->bi_baudrate	= gd->baudrate;		/* Console Baudrate */
+
+	memcpy (id, gd, sizeof (gd_t));
+	relocate_code (addr_sp, id, addr);
+
+	/* NOTREACHED - relocate_code() does not return */
+}
+/************************************************************************
+ *
+ * This is the next part if the initialization sequence: we are now
+ * running from RAM and have a "normal" C environment, i. e. global
+ * data can be written, BSS has been cleared, the stack size in not
+ * that critical any more, etc.
+ *
+ ************************************************************************
+ */
+
+void board_init_r (gd_t *id, ulong dest_addr)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+	cmd_tbl_t *cmdtp;
+	ulong size;
+	extern void malloc_bin_reloc (void);
+#ifndef CFG_ENV_IS_NOWHERE
+	extern char * env_name_spec;
+#endif
+	char *s, *e;
+	bd_t *bd;
+	int i;
+
+	gd = id;
+	gd->flags |= GD_FLG_RELOC;	/* tell others: relocation done */
+
+#ifdef DEBUG
+	printf ("Now running in RAM - U-Boot at: %08lx\n", dest_addr);
+#endif
+
+	gd->reloc_off = dest_addr - CFG_MONITOR_BASE;
+
+	/*
+	 * We have to relocate the command table manually
+	 */
+	for (cmdtp = &cmd_tbl[0]; cmdtp->name; cmdtp++) {
+		ulong addr;
+
+		addr = (ulong) (cmdtp->cmd) + gd->reloc_off;
+#if 0
+		printf ("Command \"%s\": 0x%08lx => 0x%08lx\n",
+				cmdtp->name, (ulong) (cmdtp->cmd), addr);
+#endif
+		cmdtp->cmd =
+			(int (*)(struct cmd_tbl_s *, int, int, char *[]))addr;
+
+		addr = (ulong)(cmdtp->name) + gd->reloc_off;
+		cmdtp->name = (char *)addr;
+
+		if (cmdtp->usage) {
+			addr = (ulong)(cmdtp->usage) + gd->reloc_off;
+			cmdtp->usage = (char *)addr;
+		}
+#ifdef	CFG_LONGHELP
+		if (cmdtp->help) {
+			addr = (ulong)(cmdtp->help) + gd->reloc_off;
+			cmdtp->help = (char *)addr;
+		}
+#endif
+	}
+	/* there are some other pointer constants we must deal with */
+#ifndef CFG_ENV_IS_NOWHERE
+	env_name_spec += gd->reloc_off;
+#endif
+	
+	/* configure available FLASH banks */
+	size = flash_init();
+	display_flash_config (size);
+
+	bd = gd->bd;
+	bd->bi_flashstart = CFG_FLASH_BASE;
+	bd->bi_flashsize = size;
+#if CFG_MONITOR_BASE == CFG_FLASH_BASE
+	bd->bi_flashoffset = CFG_MONITOR_LEN;	/* reserved area for U-Boot */
+#else
+	bd->bi_flashoffset = 0;
+#endif
+
+	/* initialize malloc() area */
+	mem_malloc_init();
+	malloc_bin_reloc();
+
+	/* relocate environment function pointers etc. */
+	env_relocate();
+
+	/* board MAC address */
+	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;
+	}
+
+	/* IP Address */
+	bd->bi_ip_addr = getenv_IPaddr("ipaddr");
+
+/** leave this here (after malloc(), environment and PCI are working) **/
+	/* Initialize devices */
+	devices_init ();
+
+	/* allocate syscalls table (console_init_r will fill it in */
+	syscall_tbl = (void **) malloc (NR_SYSCALLS * sizeof (void *));
+
+	/* Initialize the console (after the relocation and devices init) */
+	console_init_r ();
+/** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** **/
+
+#if (CONFIG_COMMANDS & CFG_CMD_NET) && defined(CONFIG_NET_MULTI)
+	puts ("Net:   ");
+	eth_initialize(gd->bd);
+#endif
+
+	/* main_loop() can return to retry autoboot, if so just run it again. */
+	for (;;) {
+		main_loop ();
+	}
+
+	/* NOTREACHED - no way out of command loop except booting */
+}
+
+void hang (void)
+{
+	puts ("### ERROR ### Please RESET the board ###\n");
+	for (;;);
+}
+