Initial revision

1 files changed, 675 insertions, 0 deletions

diff --git a/board/mpl/mip405/mip405.c b/board/mpl/mip405/mip405.c
new file mode 100644
index 0000000000..8bab47c107
--- /dev/null
+++ b/board/mpl/mip405/mip405.c
@@ -0,0 +1,675 @@
+/*
+ * (C) Copyright 2001
+ * Denis Peter, MPL AG Switzerland, d.peter@mpl.ch
+ *
+ * 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
+ *
+ *
+ * TODO: clean-up
+ */
+
+/*
+ * How do I program the SDRAM Timing Register (SDRAM0_TR) for a specific SDRAM or DIMM?
+ *
+ * As an example, consider a case where PC133 memory with CAS Latency equal to 2 is being
+ * used with a 200MHz 405GP. For a typical 128Mb, PC133 SDRAM, the relevant minimum
+ * parameters from the datasheet are:
+ * Tclk = 7.5ns (CL = 2)
+ * Trp = 15ns
+ * Trc = 60ns
+ * Trcd = 15ns
+ * Trfc = 66ns
+ *
+ * If we are operating the 405GP with the MemClk output frequency set to 100 MHZ, the clock
+ * period is 10ns and the parameters needed for the Timing Register are:
+ * CASL = CL = 2 clock cycles
+ * PTA = Trp = 15ns / 10ns = 2 clock cycles
+ * CTP = Trc - Trcd - Trp = (60ns - 15ns - 15ns) / 10ns= 3 clock cycles
+ * LDF = 2 clock cycles (but can be extended to meet board-level timing)
+ * RFTA = Trfc = 66ns / 10ns= 7 clock cycles
+ * RCD = Trcd = 15ns / 10ns= 2 clock cycles
+ *
+ * The actual bit settings in the register would be:
+ *
+ * CASL = 0b01
+ * PTA = 0b01
+ * CTP = 0b10
+ * LDF = 0b01
+ * RFTA = 0b011
+ * RCD = 0b01
+ *
+ * If Trfc is not specified in the datasheet for PC100 or PC133 memory, set RFTA = Trc
+ * instead. Figure 24 in the PC SDRAM Specification Rev. 1.7 shows refresh to active delay
+ * defined as Trc rather than Trfc.
+ * When using DIMM modules, most but not all of the required timing parameters can be read
+ * from the Serial Presence Detect (SPD) EEPROM on the module. Specifically, Trc and Trfc
+ * are not available from the EEPROM
+ */
+
+#include <common.h>
+#include "mip405.h"
+#include <asm/processor.h>
+#include <405gp_i2c.h>
+#include <miiphy.h>
+#include "../common/common_util.h"
+#include <i2c.h>
+extern block_dev_desc_t * scsi_get_dev(int dev);
+extern block_dev_desc_t * ide_get_dev(int dev);
+
+#undef SDRAM_DEBUG
+
+#define FALSE           0
+#define TRUE            1
+
+/* stdlib.h causes some compatibility problems; should fixe these! -- wd */
+#ifndef __ldiv_t_defined
+typedef struct {
+	long int quot;		/* Quotient	*/
+	long int rem;		/* Remainder	*/
+} ldiv_t;
+extern ldiv_t ldiv (long int __numer, long int __denom);
+# define __ldiv_t_defined	1
+#endif
+
+
+#define PLD_PART_REG 		PER_PLD_ADDR + 0
+#define PLD_VERS_REG 		PER_PLD_ADDR + 1
+#define PLD_BOARD_CFG_REG 	PER_PLD_ADDR + 2
+#define PLD_IRQ_REG 		PER_PLD_ADDR + 3
+#define PLD_COM_MODE_REG 	PER_PLD_ADDR + 4
+#define PLD_EXT_CONF_REG 	PER_PLD_ADDR + 5
+
+#define MEGA_BYTE (1024*1024)
+
+typedef struct {
+	unsigned char boardtype; /* Board revision and Population Options */
+	unsigned char cal;		/* cas Latency (will be programmend as cal-1) */
+	unsigned char trp;		/* datain27 in clocks */
+	unsigned char trcd;		/* datain29 in clocks */
+	unsigned char tras;		/* datain30 in clocks */
+	unsigned char tctp;		/* tras - trcd in clocks */
+	unsigned char am;		/* Address Mod (will be programmed as am-1) */
+	unsigned char sz;		/* log binary => Size = (4MByte<<sz) 5 = 128, 4 = 64, 3 = 32, 2 = 16, 1=8 */
+	unsigned char ecc;		/* if true, ecc is enabled */
+} sdram_t;
+
+const sdram_t sdram_table[] = {
+	{ 0x0f,	/* Rev A, 128MByte -1 Board */
+		3,	/* Case Latenty = 3 */
+		3,	/* trp 20ns / 7.5 ns datain[27] */
+  		3, 	/* trcd 20ns /7.5 ns (datain[29]) */
+  		6,  /* tras 44ns /7.5 ns  (datain[30]) */
+		4,	/* tcpt 44 - 20ns = 24ns */
+  		3,	/* Address Mode = 3 */
+		5,	/* size value */
+		1},	/* ECC enabled */
+	{ 0x07,	/* Rev A, 64MByte -2 Board */
+		3,	/* Case Latenty = 3 */
+		3,	/* trp 20ns / 7.5 ns datain[27] */
+  		3, 	/* trcd 20ns /7.5 ns (datain[29]) */
+  		6,  /* tras 44ns /7.5 ns  (datain[30]) */
+		4,	/* tcpt 44 - 20ns = 24ns */
+  		2,	/* Address Mode = 2 */
+		4,	/* size value */
+		1},	/* ECC enabled */
+	{ 0xff, /* terminator */
+	  0xff,
+	  0xff,
+	  0xff,
+	  0xff,
+	  0xff,
+	  0xff,
+	  0xff }
+};
+
+void SDRAM_err (const char *s)
+{
+#ifndef SDRAM_DEBUG
+	DECLARE_GLOBAL_DATA_PTR;
+
+	(void) get_clocks ();
+	gd->baudrate = 9600;
+	serial_init ();
+#endif
+	serial_puts ("\n");
+	serial_puts (s);
+	serial_puts ("\n enable SDRAM_DEBUG for more info\n");
+	for (;;);
+}
+
+
+unsigned char get_board_revcfg (void)
+{
+	out8 (PER_BOARD_ADDR, 0);
+	return (in8 (PER_BOARD_ADDR));
+}
+
+
+#ifdef SDRAM_DEBUG
+
+void write_hex (unsigned char i)
+{
+	char cc;
+
+	cc = i >> 4;
+	cc &= 0xf;
+	if (cc > 9)
+		serial_putc (cc + 55);
+	else
+		serial_putc (cc + 48);
+	cc = i & 0xf;
+	if (cc > 9)
+		serial_putc (cc + 55);
+	else
+		serial_putc (cc + 48);
+}
+
+void write_4hex (unsigned long val)
+{
+	write_hex ((unsigned char) (val >> 24));
+	write_hex ((unsigned char) (val >> 16));
+	write_hex ((unsigned char) (val >> 8));
+	write_hex ((unsigned char) val);
+}
+
+#endif
+
+
+int init_sdram (void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+	unsigned long	tmp, baseaddr;
+	unsigned short	i;
+	unsigned char	trp_clocks,
+			trcd_clocks,
+			tras_clocks,
+			trc_clocks,
+			tctp_clocks;
+	unsigned char	cal_val;
+	unsigned char	bc;
+	unsigned long	pbcr, sdram_tim, sdram_bank;
+	unsigned long	*p;
+
+	i2c_init (CFG_I2C_SPEED, CFG_I2C_SLAVE);
+	(void) get_clocks ();
+	gd->baudrate = 9600;
+	serial_init ();
+	serial_puts ("\nInitializing SDRAM, Please stand by");
+	mtdcr (ebccfga, pb0cr);		/* get cs0 config reg */
+	pbcr = mfdcr (ebccfgd);
+	if ((pbcr & 0x00002000) == 0) {
+		/* MPS Boot, set up the flash */
+		mtdcr (ebccfga, pb1ap);
+		mtdcr (ebccfgd, FLASH_AP);
+		mtdcr (ebccfga, pb1cr);
+		mtdcr (ebccfgd, FLASH_CR);
+	} else {
+		/* Flash boot, set up the MPS */
+		mtdcr (ebccfga, pb1ap);
+		mtdcr (ebccfgd, MPS_AP);
+		mtdcr (ebccfga, pb1cr);
+		mtdcr (ebccfgd, MPS_CR);
+	}
+	/* set up UART0 (CS2) and UART1 (CS3) */
+	mtdcr (ebccfga, pb2ap);
+	mtdcr (ebccfgd, UART0_AP);
+	mtdcr (ebccfga, pb2cr);
+	mtdcr (ebccfgd, UART0_CR);
+	mtdcr (ebccfga, pb3ap);
+	mtdcr (ebccfgd, UART1_AP);
+	mtdcr (ebccfga, pb3cr);
+	mtdcr (ebccfgd, UART1_CR);
+
+	/* set up the pld */
+	mtdcr (ebccfga, pb7ap);
+	mtdcr (ebccfgd, PLD_AP);
+	mtdcr (ebccfga, pb7cr);
+	mtdcr (ebccfgd, PLD_CR);
+	/* set up the board rev reg */
+	mtdcr (ebccfga, pb5ap);
+	mtdcr (ebccfgd, BOARD_AP);
+	mtdcr (ebccfga, pb5cr);
+	mtdcr (ebccfgd, BOARD_CR);
+
+
+#ifdef SDRAM_DEBUG
+	out8 (PER_BOARD_ADDR, 0);
+	bc = in8 (PER_BOARD_ADDR);
+	serial_puts ("\nBoard Rev: ");
+	write_hex (bc);
+	serial_puts (" (PLD=");
+	bc = in8 (PLD_BOARD_CFG_REG);
+	write_hex (bc);
+	serial_puts (")\n");
+#endif
+	bc = get_board_revcfg ();
+#ifdef SDRAM_DEBUG
+	serial_puts ("\nstart SDRAM Setup\n");
+	serial_puts ("\nBoard Rev: ");
+	write_hex (bc);
+	serial_puts ("\n");
+#endif
+	i = 0;
+	baseaddr = CFG_SDRAM_BASE;
+	while (sdram_table[i].sz != 0xff) {
+		if (sdram_table[i].boardtype == bc)
+			break;
+		i++;
+	}
+	if (sdram_table[i].boardtype != bc)
+		SDRAM_err ("No SDRAM table found for this board!!!\n");
+#ifdef SDRAM_DEBUG
+	serial_puts (" found table ");
+	write_hex (i);
+	serial_puts (" \n");
+#endif
+	cal_val = sdram_table[i].cal - 1;	/* Cas Latency */
+	trp_clocks = sdram_table[i].trp;	/* 20ns / 7.5 ns datain[27] */
+	trcd_clocks = sdram_table[i].trcd;	/* 20ns /7.5 ns (datain[29]) */
+	tras_clocks = sdram_table[i].tras;	/* 44ns /7.5 ns  (datain[30]) */
+	/* ctp = ((trp + tras) - trp - trcd) => tras - trcd */
+	tctp_clocks = sdram_table[i].tctp;	/* 44 - 20ns = 24ns */
+	/* trc_clocks is sum of trp_clocks + tras_clocks */
+	trc_clocks = trp_clocks + tras_clocks;
+	/* get SDRAM timing register */
+	mtdcr (memcfga, mem_sdtr1);
+	sdram_tim = mfdcr (memcfgd) & ~0x018FC01F;
+	/* insert CASL value */
+	sdram_tim |= ((unsigned long) (cal_val)) << 23;
+	/* insert PTA value */
+	sdram_tim |= ((unsigned long) (trp_clocks - 1)) << 18;
+	/* insert CTP value */
+	sdram_tim |=
+			((unsigned long) (trc_clocks - trp_clocks -
+							  trcd_clocks)) << 16;
+	/* insert LDF (always 01) */
+	sdram_tim |= ((unsigned long) 0x01) << 14;
+	/* insert RFTA value */
+	sdram_tim |= ((unsigned long) (trc_clocks - 4)) << 2;
+	/* insert RCD value */
+	sdram_tim |= ((unsigned long) (trcd_clocks - 1)) << 0;
+
+	tmp = ((unsigned long) (sdram_table[i].am - 1) << 13);	/* AM = 3 */
+	/* insert SZ value; */
+	tmp |= ((unsigned long) sdram_table[i].sz << 17);
+	/* get SDRAM bank 0 register */
+	mtdcr (memcfga, mem_mb0cf);
+	sdram_bank = mfdcr (memcfgd) & ~0xFFCEE001;
+	sdram_bank |= (baseaddr | tmp | 0x01);
+
+#ifdef SDRAM_DEBUG
+	serial_puts ("sdtr: ");
+	write_4hex (sdram_tim);
+	serial_puts ("\n");
+#endif
+
+	/* write SDRAM timing register */
+	mtdcr (memcfga, mem_sdtr1);
+	mtdcr (memcfgd, sdram_tim);
+
+#ifdef SDRAM_DEBUG
+	serial_puts ("mb0cf: ");
+	write_4hex (sdram_bank);
+	serial_puts ("\n");
+#endif
+
+	/* write SDRAM bank 0 register */
+	mtdcr (memcfga, mem_mb0cf);
+	mtdcr (memcfgd, sdram_bank);
+
+	if (get_bus_freq (tmp) > 110000000) {	/* > 110MHz */
+		/* get SDRAM refresh interval register */
+		mtdcr (memcfga, mem_rtr);
+		tmp = mfdcr (memcfgd) & ~0x3FF80000;
+		tmp |= 0x07F00000;
+	} else {
+		/* get SDRAM refresh interval register */
+		mtdcr (memcfga, mem_rtr);
+		tmp = mfdcr (memcfgd) & ~0x3FF80000;
+		tmp |= 0x05F00000;
+	}
+	/* write SDRAM refresh interval register */
+	mtdcr (memcfga, mem_rtr);
+	mtdcr (memcfgd, tmp);
+	/* enable ECC if used */
+#if 1
+	if (sdram_table[i].ecc) {
+		/* disable checking for all banks */
+#ifdef SDRAM_DEBUG
+		serial_puts ("disable ECC.. ");
+#endif
+		mtdcr (memcfga, mem_ecccf);
+		tmp = mfdcr (memcfgd);
+		tmp &= 0xff0fffff;		/* disable all banks */
+		mtdcr (memcfga, mem_ecccf);
+		/* set up SDRAM Controller with ECC enabled */
+#ifdef SDRAM_DEBUG
+		serial_puts ("setup SDRAM Controller.. ");
+#endif
+		mtdcr (memcfgd, tmp);
+		mtdcr (memcfga, mem_mcopt1);
+		tmp = (mfdcr (memcfgd) & ~0xFFE00000) | 0x90800000;
+		mtdcr (memcfga, mem_mcopt1);
+		mtdcr (memcfgd, tmp);
+		udelay (600);
+#ifdef SDRAM_DEBUG
+		serial_puts ("fill the memory..\n");
+#endif
+		serial_puts (".");
+		/* now, fill all the memory */
+		tmp = ((4 * MEGA_BYTE) << sdram_table[i].sz);
+		p = (unsigned long) 0;
+		while ((unsigned long) p < tmp) {
+			*p++ = 0L;
+			if (!((unsigned long) p % 0x00800000))	/* every 8MByte */
+				serial_puts (".");
+
+
+		}
+		/* enable bank 0 */
+		serial_puts (".");
+#ifdef SDRAM_DEBUG
+		serial_puts ("enable ECC\n");
+#endif
+		udelay (400);
+		mtdcr (memcfga, mem_ecccf);
+		tmp = mfdcr (memcfgd);
+		tmp |= 0x00800000;		/* enable bank 0 */
+		mtdcr (memcfgd, tmp);
+		udelay (400);
+	} else
+#endif
+	{
+		/* enable SDRAM controller with no ECC, 32-bit SDRAM width, 16 byte burst */
+		mtdcr (memcfga, mem_mcopt1);
+		tmp = (mfdcr (memcfgd) & ~0xFFE00000) | 0x80C00000;
+		mtdcr (memcfga, mem_mcopt1);
+		mtdcr (memcfgd, tmp);
+		udelay (400);
+	}
+	serial_puts ("\n");
+	return (0);
+}
+
+int board_pre_init (void)
+{
+	init_sdram ();
+
+   /*-------------------------------------------------------------------------+
+   | Interrupt controller setup for the PIP405 board.
+   | Note: IRQ 0-15  405GP internally generated; active high; level sensitive
+   |       IRQ 16    405GP internally generated; active low; level sensitive
+   |       IRQ 17-24 RESERVED
+   |       IRQ 25 (EXT IRQ 0) SouthBridge; active low; level sensitive
+   |       IRQ 26 (EXT IRQ 1) NMI: active low; level sensitive
+   |       IRQ 27 (EXT IRQ 2) SMI: active Low; level sensitive
+   |       IRQ 28 (EXT IRQ 3) PCI SLOT 3; active low; level sensitive
+   |       IRQ 29 (EXT IRQ 4) PCI SLOT 2; active low; level sensitive
+   |       IRQ 30 (EXT IRQ 5) PCI SLOT 1; active low; level sensitive
+   |       IRQ 31 (EXT IRQ 6) PCI SLOT 0; active low; level sensitive
+   | Note for MIP405 board:
+   |       An interrupt taken for the SouthBridge (IRQ 25) indicates that
+   |       the Interrupt Controller in the South Bridge has caused the
+   |       interrupt. The IC must be read to determine which device
+   |       caused the interrupt.
+   |
+   +-------------------------------------------------------------------------*/
+	mtdcr (uicsr, 0xFFFFFFFF);	/* clear all ints */
+	mtdcr (uicer, 0x00000000);	/* disable all ints */
+	mtdcr (uiccr, 0x00000000);	/* set all to be non-critical (for now) */
+	mtdcr (uicpr, 0xFFFFFF80);	/* set int polarities */
+	mtdcr (uictr, 0x10000000);	/* set int trigger levels */
+	mtdcr (uicvcr, 0x00000001);	/* set vect base=0,INT0 highest priority */
+	mtdcr (uicsr, 0xFFFFFFFF);	/* clear all ints */
+	return 0;
+}
+
+
+/*
+ * Get some PLD Registers
+ */
+
+unsigned short get_pld_parvers (void)
+{
+	unsigned short result;
+	unsigned char rc;
+
+	rc = in8 (PLD_PART_REG);
+	result = (unsigned short) rc << 8;
+	rc = in8 (PLD_VERS_REG);
+	result |= rc;
+	return result;
+}
+
+
+
+void user_led0 (unsigned char on)
+{
+	if (on)
+		out8 (PLD_COM_MODE_REG, (in8 (PLD_COM_MODE_REG) | 0x4));
+	else
+		out8 (PLD_COM_MODE_REG, (in8 (PLD_COM_MODE_REG) & 0xfb));
+}
+
+
+void ide_set_reset (int idereset)
+{
+	/* if reset = 1 IDE reset will be asserted */
+	if (idereset)
+		out8 (PLD_COM_MODE_REG, (in8 (PLD_COM_MODE_REG) | 0x1));
+	else {
+		udelay (10000);
+		out8 (PLD_COM_MODE_REG, (in8 (PLD_COM_MODE_REG) & 0xfe));
+	}
+}
+
+
+/* ------------------------------------------------------------------------- */
+
+/*
+ * Check Board Identity:
+ */
+
+int checkboard (void)
+{
+	unsigned char s[50];
+	unsigned char bc, var, rc;
+	int i;
+	backup_t *b = (backup_t *) s;
+
+	puts ("Board: ");
+
+	bc = get_board_revcfg ();
+	var = ~bc;
+	var &= 0xf;
+	rc = 0;
+	for (i = 0; i < 4; i++) {
+		rc <<= 1;
+		rc += (var & 0x1);
+		var >>= 1;
+	}
+	rc++;
+	i = getenv_r ("serial#", s, 32);
+	if ((i == 0) || strncmp (s, "MIP405", 6)) {
+		get_backup_values (b);
+		if (strncmp (b->signature, "MPL\0", 4) != 0) {
+			puts ("### No HW ID - assuming MIP405");
+			printf ("-%d Rev %c", rc, 'A' + ((bc >> 4) & 0xf));
+		} else {
+			b->serial_name[6] = 0;
+			printf ("%s-%d Rev %c SN: %s", b->serial_name, rc,
+					'A' + ((bc >> 4) & 0xf), &b->serial_name[7]);
+		}
+	} else {
+		s[6] = 0;
+		printf ("%s-%d Rev %c SN: %s", s, rc, 'A' + ((bc >> 4) & 0xf),
+				&s[7]);
+	}
+	bc = in8 (PLD_EXT_CONF_REG);
+	printf (" Boot Config: 0x%x\n", bc);
+	return (0);
+}
+
+
+/* ------------------------------------------------------------------------- */
+/* ------------------------------------------------------------------------- */
+/*
+  initdram(int board_type) reads EEPROM via I2c. EEPROM contains all of
+  the necessary info for SDRAM controller configuration
+*/
+/* ------------------------------------------------------------------------- */
+/* ------------------------------------------------------------------------- */
+static int test_dram (unsigned long ramsize);
+
+long int initdram (int board_type)
+{
+
+	unsigned long bank_reg[4], tmp, bank_size;
+	int i, ds;
+	unsigned long TotalSize;
+
+	ds = 0;
+	/* since the DRAM controller is allready set up, calculate the size with the
+	   bank registers    */
+	mtdcr (memcfga, mem_mb0cf);
+	bank_reg[0] = mfdcr (memcfgd);
+	mtdcr (memcfga, mem_mb1cf);
+	bank_reg[1] = mfdcr (memcfgd);
+	mtdcr (memcfga, mem_mb2cf);
+	bank_reg[2] = mfdcr (memcfgd);
+	mtdcr (memcfga, mem_mb3cf);
+	bank_reg[3] = mfdcr (memcfgd);
+	TotalSize = 0;
+	for (i = 0; i < 4; i++) {
+		if ((bank_reg[i] & 0x1) == 0x1) {
+			tmp = (bank_reg[i] >> 17) & 0x7;
+			bank_size = 4 << tmp;
+			TotalSize += bank_size;
+		} else
+			ds = 1;
+	}
+	mtdcr (memcfga, mem_ecccf);
+	tmp = mfdcr (memcfgd);
+
+	if (!tmp)
+		printf ("No ");
+	printf ("ECC ");
+
+	test_dram (TotalSize * MEGA_BYTE);
+	return (TotalSize * MEGA_BYTE);
+}
+
+/* ------------------------------------------------------------------------- */
+
+extern int mem_test (unsigned long start, unsigned long ramsize,
+					 int quiet);
+
+static int test_dram (unsigned long ramsize)
+{
+#ifdef SDRAM_DEBUG
+	mem_test (0L, ramsize, 1);
+#endif
+	/* not yet implemented */
+	return (1);
+}
+
+int misc_init_r (void)
+{
+	return (0);
+}
+
+
+void print_mip405_rev (void)
+{
+	unsigned char part, vers, cfg, rev;
+
+	cfg = get_board_revcfg ();
+	vers = cfg;
+	vers &= 0xf;
+	rev = (((vers & 0x1) ? 0x8 : 0) |
+		   ((vers & 0x2) ? 0x4 : 0) |
+		   ((vers & 0x4) ? 0x2 : 0) | ((vers & 0x8) ? 0x1 : 0));
+
+	part = in8 (PLD_PART_REG);
+	vers = in8 (PLD_VERS_REG);
+	printf ("Rev:   MIP405-%d Rev %c PLD%d Vers %d\n",
+			(16 - rev), ((cfg >> 4) & 0xf) + 'A', part, vers);
+}
+
+
+int last_stage_init (void)
+{
+	if (miiphy_write (0x1, 0x14, 0x2402) != 0) {
+		printf ("Error writing to the PHY\n");
+	}
+	print_mip405_rev ();
+	show_stdio_dev ();
+	check_env ();
+	return 0;
+}
+
+/***************************************************************************
+ * some helping routines
+ */
+
+int overwrite_console (void)
+{
+	return ((in8 (PLD_EXT_CONF_REG) & 0x1)==0);	/* return TRUE if console should be overwritten */
+}
+
+
+/************************************************************************
+* Print MIP405 Info
+************************************************************************/
+void print_mip405_info (void)
+{
+	unsigned char part, vers, cfg, irq_reg, com_mode, ext;
+
+	part = in8 (PLD_PART_REG);
+	vers = in8 (PLD_VERS_REG);
+	cfg = in8 (PLD_BOARD_CFG_REG);
+	irq_reg = in8 (PLD_IRQ_REG);
+	com_mode = in8 (PLD_COM_MODE_REG);
+	ext = in8 (PLD_EXT_CONF_REG);
+
+	printf ("PLD Part %d version %d\n", part, vers);
+	printf ("Board Revision %c\n", ((cfg >> 4) & 0xf) + 'A');
+	printf ("Population Options %d %d %d %d\n", (cfg) & 0x1,
+			(cfg >> 1) & 0x1, (cfg >> 2) & 0x1, (cfg >> 3) & 0x1);
+	printf ("User LED %s\n", (com_mode & 0x4) ? "on" : "off");
+	printf ("UART Clocks %d\n", (com_mode >> 4) & 0x3);
+	printf ("Test ist %x\n", com_mode);
+	printf ("User Config Switch %d %d %d %d %d %d %d %d\n",
+			(ext) & 0x1, (ext >> 1) & 0x1, (ext >> 2) & 0x1,
+			(ext >> 3) & 0x1, (ext >> 4) & 0x1, (ext >> 5) & 0x1,
+			(ext >> 6) & 0x1, (ext >> 7) & 0x1);
+	printf ("SER1 uses handshakes %s\n",
+			(ext & 0x80) ? "DTR/DSR" : "RTS/CTS");
+	printf ("IDE Reset %s\n", (ext & 0x01) ? "asserted" : "not asserted");
+	printf ("IRQs:\n");
+	printf ("  PIIX INTR: %s\n", (irq_reg & 0x80) ? "inactive" : "active");
+	printf ("  UART0 IRQ: %s\n", (irq_reg & 0x40) ? "inactive" : "active");
+	printf ("  UART1 IRQ: %s\n", (irq_reg & 0x20) ? "inactive" : "active");
+	printf ("  PIIX SMI:  %s\n", (irq_reg & 0x10) ? "inactive" : "active");
+	printf ("  PIIX INIT: %s\n", (irq_reg & 0x8) ? "inactive" : "active");
+	printf ("  PIIX NMI:  %s\n", (irq_reg & 0x4) ? "inactive" : "active");
+}
+
+