* Patch by Bernhard Kuhn, 28 Nov 2003:

  add support for Coldfire CPU
  add support for Motorola M5272C3 and M5282EVB boards

1 files changed, 493 insertions, 0 deletions

diff --git a/lib_m68k/board.c b/lib_m68k/board.c
new file mode 100644
index 0000000..b4c6119
--- /dev/null
+++ b/lib_m68k/board.c
@@ -0,0 +1,493 @@
+/*
+ * (C) Copyright 2000-2003
+ * 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 <watchdog.h>
+#include <command.h>
+#include <malloc.h>
+#include <devices.h>
+#include <syscall.h>
+#if (CONFIG_COMMANDS & CFG_CMD_IDE)
+#include <ide.h>
+#endif
+#if (CONFIG_COMMANDS & CFG_CMD_SCSI)
+#include <scsi.h>
+#endif
+#if (CONFIG_COMMANDS & CFG_CMD_KGDB)
+#include <kgdb.h>
+#endif
+#ifdef CONFIG_STATUS_LED
+#include <status_led.h>
+#endif
+#include <net.h>
+#if (CONFIG_COMMANDS & CFG_CMD_BEDBUG)
+#include <cmd_bedbug.h>
+#endif
+#ifdef CFG_ALLOC_DPRAM
+#include <commproc.h>
+#endif
+#include <version.h>
+
+static char *failed = "*** failed ***\n";
+
+#ifdef	CONFIG_PCU_E
+extern flash_info_t flash_info[];
+#endif
+
+#if defined(CFG_ENV_IS_IN_FLASH)
+# ifndef  CFG_ENV_ADDR
+#  define CFG_ENV_ADDR	(CFG_FLASH_BASE + CFG_ENV_OFFSET)
+# endif
+# ifndef  CFG_ENV_SIZE
+#  define CFG_ENV_SIZE	CFG_ENV_SECT_SIZE
+# endif
+# if (CFG_ENV_ADDR >= CFG_MONITOR_BASE) && \
+     (CFG_ENV_ADDR+CFG_ENV_SIZE) < (CFG_MONITOR_BASE + CFG_MONITOR_LEN)
+#  define ENV_IS_EMBEDDED
+# endif
+#endif /* CFG_ENV_IS_IN_FLASH */
+#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
+
+/*
+ * 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;
+
+/************************************************************************
+ * Utilities								*
+ ************************************************************************
+ */
+
+/*
+ * The Malloc area is immediately below the monitor copy in DRAM
+ */
+static void mem_malloc_init (ulong dest_addr)
+{
+	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);
+}
+
+char *strmhz (char *buf, long hz)
+{
+	long l, n;
+	long m;
+
+	n = hz / 1000000L;
+
+	l = sprintf (buf, "%ld", n);
+
+	m = (hz % 1000000L) / 1000L;
+
+	if (m != 0)
+		sprintf (buf + l, ".%03ld", m);
+
+	return (buf);
+}
+
+static void syscalls_init (int reloc_off)
+{
+	ulong *addr;
+
+	addr = (ulong *) syscall_tbl;
+	syscall_tbl[SYSCALL_MALLOC] = (void *) malloc;
+	syscall_tbl[SYSCALL_FREE] = (void *) free;
+
+	syscall_tbl[SYSCALL_INSTALL_HDLR] = (void *) irq_install_handler;
+	syscall_tbl[SYSCALL_FREE_HDLR] = (void *) irq_free_handler;
+
+	addr = (ulong *) 0xc00;	/* syscall ISR addr */
+
+	/* patch ISR code */
+	*addr++ |= (ulong) syscall_tbl >> 16;
+	*addr++ |= (ulong) syscall_tbl & 0xFFFF;
+	*addr++ |= NR_SYSCALLS >> 16;
+	*addr++ |= NR_SYSCALLS & 0xFFFF;
+}
+
+/************************************************************************
+ *
+ * This is the first part of the initialization sequence that is
+ * implemented in C, but still running from ROM.
+ *
+ * The main purpose is to provide a (serial) console interface as
+ * soon as possible (so we can see any error messages), and to
+ * initialize the RAM so that we can relocate the monitor code to
+ * RAM.
+ *
+ * Be aware of the restrictions: global data is read-only, BSS is not
+ * initialized, and stack space is limited to a few kB.
+ *
+ ************************************************************************
+ */
+
+
+gd_t *global_data;
+static gd_t gdata;
+static bd_t bdata;
+
+void board_init_f (ulong bootflag)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+	bd_t *bd;
+	ulong reg, len, addr, addr_sp, dram_size;
+	int i, baudrate, board_type;
+	char *s, *e;
+	uchar tmp[64];		/* long enough for environment variables */
+
+	/* Pointer to initial global data area */
+	gd = global_data = &gdata;
+	bd = gd->bd = &bdata;
+
+	init_timebase ();
+	env_init ();
+
+	i = getenv_r ("baudrate", tmp, sizeof (tmp));
+	baudrate =
+		(i > 0) ? (int) simple_strtoul (tmp, NULL,
+						10) : CONFIG_BAUDRATE;
+	bd->bi_baudrate = baudrate;	/* Console Baudrate             */
+
+	/* set up serial port */
+	serial_init ();
+
+	/* Initialize the console (before the relocation) */
+	console_init_f ();
+
+#ifdef DEBUG
+	if (sizeof (init_data_t) > CFG_INIT_DATA_SIZE) {
+		printf ("PANIC: sizeof(init_data_t)=%d > CFG_INIT_DATA_SIZE=%d\n", sizeof (init_data_t), CFG_INIT_DATA_SIZE);
+		hang ();
+	}
+#endif /* DEBUG */
+
+	/* now we can use standard printf/puts/getc/tstc functions */
+	display_options ();
+
+	puts ("CPU:   ");	/* Check CPU            */
+	if (checkcpu () < 0) {
+		puts (failed);
+		hang ();
+	}
+
+	puts ("Board: ");	/* Check Board          */
+	if ((board_type = checkboard ()) < 0) {
+		puts (failed);
+		hang ();
+	}
+
+	puts ("DRAM:  ");
+	if ((dram_size = initdram (board_type)) > 0) {
+		printf ("%2ld MB\n", dram_size >> 20);
+	} else {
+		puts (failed);
+		hang ();
+	}
+
+#if defined(CFG_DRAM_TEST)
+	if (testdram () != 0) {
+		hang ();
+	}
+#endif /* CFG_DRAM_TEST */
+
+	/*
+	 * Now that we have DRAM mapped and working, we can
+	 * relocate the code and continue running from DRAM.
+	 *
+	 * Reserve memory at end of RAM for (top down in that order):
+	 *  - protected RAM
+	 *  - LCD framebuffer
+	 *  - monitor code
+	 *  - board info struct
+	 */
+	len = get_endaddr () - CFG_MONITOR_BASE;
+
+	if (len > CFG_MONITOR_LEN) {
+		printf ("*** u-boot size %ld > reserved memory (%d)\n",
+			len, CFG_MONITOR_LEN);
+		hang ();
+	}
+
+	if (CFG_MONITOR_LEN > len)
+		len = CFG_MONITOR_LEN;
+
+	addr = CFG_SDRAM_BASE + dram_size;
+	addr -= len;
+
+	/*
+	 * Save local variables to board info struct
+	 */
+	bd->bi_memstart = CFG_SDRAM_BASE;	/* start of  DRAM memory              */
+	bd->bi_memsize = dram_size;	/* size  of  DRAM memory in bytes     */
+	bd->bi_bootflags = bootflag;	/* boot / reboot flag (for LynxOS)    */
+
+	i = getenv_r ("ethaddr", tmp, sizeof (tmp));
+	s = (i > 0) ? tmp : NULL;
+
+	for (reg = 0; reg < 6; ++reg) {
+		bd->bi_enetaddr[reg] = s ? simple_strtoul (s, &e, 16) : 0;
+		if (s)
+			s = (*e) ? e + 1 : e;
+	}
+
+	bd->bi_intfreq = get_gclk_freq ();	/* Internal Freq, in Hz */
+	bd->bi_busfreq = get_bus_freq (get_gclk_freq ());	/* Bus Freq,      in Hz */
+
+#ifdef CFG_EXTBDINFO
+	strncpy (bd->bi_s_version, "1.2", sizeof (bd->bi_s_version));
+	strncpy (bd->bi_r_version, PPCBOOT_VERSION,
+		 sizeof (bd->bi_r_version));
+
+	bd->bi_procfreq = get_gclk_freq ();	/* Processor Speed, In Hz */
+	bd->bi_plb_busfreq = bd->bi_busfreq;
+#endif
+
+	board_init_final (addr);
+
+}
+
+
+/************************************************************************
+ *
+ * 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_final (ulong dest_addr)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+	char *s;
+	cmd_tbl_t *cmdtp;
+	ulong flash_size;
+	bd_t *bd;
+
+	bd = gd->bd;
+	// icache_enable(); /* it's time to enable the instruction cache */
+
+	/*
+	 * Setup trap handlers
+	 */
+	trap_init (dest_addr);
+
+	puts ("FLASH: ");
+
+	if ((flash_size = flash_init ()) > 0) {
+#ifdef CFG_FLASH_CHECKSUM
+		if (flash_size >= (1 << 20)) {
+			printf ("%2ld MB", flash_size >> 20);
+		} else {
+			printf ("%2ld kB", flash_size >> 10);
+		}
+		/*
+		 * Compute and print flash CRC if flashchecksum is set to 'y'
+		 *
+		 * NOTE: Maybe we should add some WATCHDOG_RESET()?     XXX
+		 */
+		s = getenv ("flashchecksum");
+		if (s && (*s == 'y')) {
+			printf ("  CRC: %08lX",
+				crc32 (0,
+				       (const unsigned char *) CFG_FLASH_BASE,
+				       flash_size)
+				);
+		}
+		putc ('\n');
+#else
+		if (flash_size >= (1 << 20)) {
+			printf ("%2ld MB\n", flash_size >> 20);
+		} else {
+			printf ("%2ld kB\n", flash_size >> 10);
+		}
+#endif /* CFG_FLASH_CHECKSUM */
+	} else {
+		puts (failed);
+		hang ();
+	}
+
+	bd->bi_flashstart = CFG_FLASH_BASE;	/* update start of FLASH memory        */
+	bd->bi_flashsize = flash_size;	/* size of FLASH memory (final value)     */
+	bd->bi_flashoffset = 0x10000;	/* reserved area for startup monitor  */
+
+	WATCHDOG_RESET ();
+
+	/* initialize higher level parts of CPU like time base and timers */
+	cpu_init_r ();
+
+	WATCHDOG_RESET ();
+
+	/* initialize malloc() area */
+	mem_malloc_init (dest_addr);
+
+#ifdef CONFIG_SPI
+# if !defined(CFG_ENV_IS_IN_EEPROM)
+	spi_init_f ();
+# endif
+	spi_init_r ();
+#endif
+
+	/* relocate environment function pointers etc. */
+	env_relocate ();
+
+	/* IP Address */
+	bd->bi_ip_addr = getenv_IPaddr ("ipaddr");
+
+	WATCHDOG_RESET ();
+
+	/* 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) */
+
+
+#if (CONFIG_COMMANDS & CFG_CMD_NET) && ( \
+    defined(CONFIG_CCM)		|| \
+    defined(CONFIG_EP8260)	|| \
+    defined(CONFIG_IP860)	|| \
+    defined(CONFIG_IVML24)	|| \
+    defined(CONFIG_IVMS8)	|| \
+    defined(CONFIG_LWMON)	|| \
+    defined(CONFIG_MPC8260ADS)	|| \
+    defined(CONFIG_PCU_E)	|| \
+    defined(CONFIG_RPXSUPER)	|| \
+    defined(CONFIG_SPD823TS)	)
+
+	WATCHDOG_RESET ();
+# ifdef DEBUG
+	puts ("Reset Ethernet PHY\n");
+# endif
+	reset_phy ();
+#endif
+
+
+#if (CONFIG_COMMANDS & CFG_CMD_KGDB)
+	WATCHDOG_RESET ();
+	puts ("KGDB:  ");
+	kgdb_init ();
+#endif
+
+	/*
+	 * Enable Interrupts
+	 */
+	interrupt_init ();
+	udelay (20);
+	set_timer (0);
+
+	/* Insert function pointers now that we have relocated the code */
+
+	/* Initialize from environment */
+	if ((s = getenv ("loadaddr")) != NULL) {
+		load_addr = simple_strtoul (s, NULL, 16);
+	}
+#if (CONFIG_COMMANDS & CFG_CMD_NET)
+	if ((s = getenv ("bootfile")) != NULL) {
+		copy_filename (BootFile, s, sizeof (BootFile));
+	}
+#endif /* CFG_CMD_NET */
+
+	WATCHDOG_RESET ();
+
+#if (CONFIG_COMMANDS & CFG_CMD_NET) && defined(CONFIG_NET_MULTI)
+	WATCHDOG_RESET ();
+	puts ("Net:   ");
+	eth_initialize (bd);
+#endif
+
+#ifdef CONFIG_LAST_STAGE_INIT
+	WATCHDOG_RESET ();
+	/*
+	 * Some parts can be only initialized if all others (like
+	 * Interrupts) are up and running (i.e. the PC-style ISA
+	 * keyboard).
+	 */
+	last_stage_init ();
+#endif
+
+#if (CONFIG_COMMANDS & CFG_CMD_BEDBUG)
+	WATCHDOG_RESET ();
+	bedbug_init ();
+#endif
+
+#ifdef CONFIG_PRAM
+	/*
+	 * Export available size of memory for Linux,
+	 * taking into account the protected RAM at top of memory
+	 */
+	{
+		ulong pram;
+		char *s;
+		uchar memsz[32];
+
+		if ((s = getenv ("pram")) != NULL) {
+			pram = simple_strtoul (s, NULL, 10);
+		} else {
+			pram = CONFIG_PRAM;
+		}
+		sprintf (memsz, "%ldk", (bd->bi_memsize / 1024) - pram);
+		setenv ("mem", memsz);
+	}
+#endif
+
+	/* Initialization complete - start the monitor */
+
+	/* main_loop() can return to retry autoboot, if so just run it again. */
+	for (;;) {
+		WATCHDOG_RESET ();
+		main_loop ();
+	}
+
+	/* NOTREACHED - no way out of command loop except booting */
+}
+
+void hang (void)
+{
+	puts ("### ERROR ### Please RESET the board ###\n");
+	for (;;);
+}