board/sc520_cdp/sc520_cdp.c - platform/external/u-boot - Gitiles

 /*
  * (C) Copyright 2002
  * Daniel Engström, Omicron Ceti AB <daniel@omicron.se>.
  *
  * 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 <pci.h>
 #include <asm/io.h>
 #include <asm/ic/sc520.h>
 #include <asm/ic/ali512x.h>

 /* ------------------------------------------------------------------------- */

 static void irq_init(void)
 {

 	/* disable global interrupt mode */
 	write_mmcr_byte(SC520_PICICR, 0x40);

 	/* set irq0-7 to edge */
 	write_mmcr_byte(SC520_MPICMODE, 0x00);

 	/* set irq9-12 to level, all the other (8, 13-15) are edge */
 	write_mmcr_byte(SC520_SL1PICMODE, 0x1e);

 	/* set irq16-24 (unused slave pic2) to level */
 	write_mmcr_byte(SC520_SL2PICMODE, 0xff);

 	/* active low polarity on PIC interrupt pins,
 	   active high polarity on all other irq pins */
 	write_mmcr_word(SC520_INTPINPOL, 0);

 	/* set irq number mapping */
 	write_mmcr_byte(SC520_GPTMR0MAP,0);            /* disable GP timer 0 INT */
 	write_mmcr_byte(SC520_GPTMR1MAP,0);            /* disable GP timer 1 INT */
 	write_mmcr_byte(SC520_GPTMR2MAP,0);            /* disable GP timer 2 INT */
 	write_mmcr_byte(SC520_PIT0MAP,0x1);            /* Set PIT timer 0 INT to IRQ0 */
 	write_mmcr_byte(SC520_PIT1MAP,0);              /* diable PIT timer 1 INT */
 	write_mmcr_byte(SC520_PIT2MAP,0);              /* diable PIT timer 2 INT */
 	write_mmcr_byte(SC520_PCIINTAMAP,0x4);         /* Set PCI INT A to IRQ9 */
 	write_mmcr_byte(SC520_PCIINTBMAP,0x5);         /* Set PCI INT B to IRQ10 */
 	write_mmcr_byte(SC520_PCIINTCMAP,0x6);         /* Set PCI INT C to IRQ11 */
 	write_mmcr_byte(SC520_PCIINTDMAP,0x7);         /* Set PCI INT D to IRQ12 */
 	write_mmcr_byte(SC520_DMABCINTMAP,0);          /* disable DMA INT */
 	write_mmcr_byte(SC520_SSIMAP,0);               /* disable Synchronius serial INT */
 	write_mmcr_byte(SC520_WDTMAP,0);               /* disable Watchdor INT */
 	write_mmcr_byte(SC520_RTCMAP,0x3);             /* Set RTC int to 8 */
 	write_mmcr_byte(SC520_WPVMAP,0);               /* disable write protect INT */
 	write_mmcr_byte(SC520_ICEMAP,0x2);             /* Set ICE Debug Serielport INT to IRQ1 */
 	write_mmcr_byte(SC520_FERRMAP,0x8);            /* Set FP error INT to IRQ13 */
 	write_mmcr_byte(SC520_GP0IMAP,6);              /* Set GPIRQ0 (ISA IRQ2) to IRQ9 */
 	write_mmcr_byte(SC520_GP1IMAP,2);              /* Set GPIRQ1 (SIO IRQ1) to IRQ1 */
 	write_mmcr_byte(SC520_GP2IMAP,7);              /* Set GPIRQ2 (ISA IRQ12) to IRQ12 */

 	if (CFG_USE_SIO_UART) {
 		write_mmcr_byte(SC520_UART1MAP,0);     /* disable internal UART1 INT */
 		write_mmcr_byte(SC520_UART2MAP,0);     /* disable internal UART2 INT */
 		write_mmcr_byte(SC520_GP3IMAP,11);     /* Set GPIRQ3 (ISA IRQ3) to IRQ3 */
 		write_mmcr_byte(SC520_GP4IMAP,12);     /* Set GPIRQ4 (ISA IRQ4) to IRQ4 */
 	} else {
 		write_mmcr_byte(SC520_UART1MAP,12);    /* Set internal UART2 INT to IRQ4 */
 		write_mmcr_byte(SC520_UART2MAP,11);    /* Set internal UART2 INT to IRQ3 */
 		write_mmcr_byte(SC520_GP3IMAP,0);      /* disable GPIRQ3 (ISA IRQ3) */
 		write_mmcr_byte(SC520_GP4IMAP,0);      /* disable GPIRQ4 (ISA IRQ4) */
 	}

 	write_mmcr_byte(SC520_GP5IMAP,13);             /* Set GPIRQ5 (ISA IRQ5) to IRQ5 */
 	write_mmcr_byte(SC520_GP6IMAP,21);             /* Set GPIRQ6 (ISA IRQ6) to IRQ6 */
 	write_mmcr_byte(SC520_GP7IMAP,22);             /* Set GPIRQ7 (ISA IRQ7) to IRQ7 */
 	write_mmcr_byte(SC520_GP8IMAP,3);              /* Set GPIRQ8 (SIO IRQ8) to IRQ8 */
 	write_mmcr_byte(SC520_GP9IMAP,4);              /* Set GPIRQ9 (ISA IRQ9) to IRQ9 */
 	write_mmcr_byte(SC520_GP10IMAP,9);             /* Set GPIRQ10 (ISA IRQ10) to IRQ10 */
 	write_mmcr_word(SC520_PCIHOSTMAP,0x11f);       /* Map PCI hostbridge INT to NMI */
 	write_mmcr_word(SC520_ECCMAP,0x100);           /* Map SDRAM ECC failure INT to NMI */

 }

 /* PCI stuff */
 static void pci_sc520_cdp_fixup_irq(struct pci_controller *hose, pci_dev_t dev)
 {
 	char pin;
 	int irq;


 	pci_hose_read_config_byte(hose, dev, PCI_INTERRUPT_PIN, &pin);
 	irq = pin-1;

 	switch (PCI_DEV(dev)) {
 	case 20:
 		break;
 	case 19:
 		irq+=1;
 		break;
 	case 18:
 		irq+=2;
 		break;
 	case 17:
 		irq+=3;
 		break;
 	default:
 		return;
 	}

 	irq&=3; /* wrap around */
 	irq+=9; /* lowest IRQ is 9 */

 	pci_hose_write_config_byte(hose, dev, PCI_INTERRUPT_LINE, irq);
 #if 0
 	printf("fixup_irq: device %d pin %c irq %d\n",
 	       PCI_DEV(dev), 'A' + pin -1, irq);
 #endif
 }

 static struct pci_controller sc520_cdp_hose = {
 	fixup_irq: pci_sc520_cdp_fixup_irq,
 };

 void pci_init_board(void)
 {
 	pci_sc520_init(&sc520_cdp_hose);
 }


 static void silence_uart(int port)
 {
 	outb(0, port+1);
 }

 void setup_ali_sio(int uart_primary)
 {
 	ali512x_init();

 	ali512x_set_fdc(ALI_ENABLED, 0x3f2, 6, 0);
 	ali512x_set_pp(ALI_ENABLED, 0x278, 7, 3);
 	ali512x_set_uart(ALI_ENABLED, ALI_UART1, uart_primary?0x3f8:0x3e8, 4);
 	ali512x_set_uart(ALI_ENABLED, ALI_UART2, uart_primary?0x2f8:0x2e8, 3);
 	ali512x_set_rtc(ALI_DISABLED, 0, 0);
 	ali512x_set_kbc(ALI_ENABLED, 1, 12);
 	ali512x_set_cio(ALI_ENABLED);

 	/* IrDa pins */
 	ali512x_cio_function(12, 1, 0, 0);
 	ali512x_cio_function(13, 1, 0, 0);

 	/* SSI chip select pins */
 	ali512x_cio_function(14, 0, 0, 0);  /* SSI_CS */
 	ali512x_cio_function(15, 0, 0, 0);  /* SSI_MV */
 	ali512x_cio_function(16, 0, 1, 0);  /* SSI_SPI# (inverted) */

 	/* Board REV pins */
 	ali512x_cio_function(20, 0, 0, 1);
 	ali512x_cio_function(21, 0, 0, 1);
 	ali512x_cio_function(22, 0, 0, 1);
 	ali512x_cio_function(23, 0, 0, 1);
 }


 /* set up the ISA bus timing and system address mappings */
 static void bus_init(void)
 {

 	/* set up the GP IO pins */
 	write_mmcr_word(SC520_PIOPFS31_16, 0xf7ff); 	/* set the GPIO pin function 31-16 reg */
 	write_mmcr_word(SC520_PIOPFS15_0, 0xffff);  	/* set the GPIO pin function 15-0 reg */
 	write_mmcr_byte(SC520_CSPFS, 0xf8);  		/* set the CS pin function  reg */
 	write_mmcr_byte(SC520_CLKSEL, 0x70);


 	write_mmcr_byte(SC520_GPCSRT, 1);   /* set the GP CS offset */
 	write_mmcr_byte(SC520_GPCSPW, 3);   /* set the GP CS pulse width */
 	write_mmcr_byte(SC520_GPCSOFF, 1);  /* set the GP CS offset */
 	write_mmcr_byte(SC520_GPRDW, 3);    /* set the RD pulse width */
 	write_mmcr_byte(SC520_GPRDOFF, 1);  /* set the GP RD offset */
         write_mmcr_byte(SC520_GPWRW, 3);    /* set the GP WR pulse width */
 	write_mmcr_byte(SC520_GPWROFF, 1);  /* set the GP WR offset */

 	write_mmcr_word(SC520_BOOTCSCTL, 0x1823);		/* set up timing of BOOTCS */
 	write_mmcr_word(SC520_ROMCS1CTL, 0x1823);		/* set up timing of ROMCS1 */
 	write_mmcr_word(SC520_ROMCS2CTL, 0x1823);		/* set up timing of ROMCS2 */

 	/* adjust the memory map:
 	 * by default the first 256MB (0x00000000 - 0x0fffffff) is mapped to SDRAM
 	 * and 256MB to 1G-128k  (0x1000000 - 0x37ffffff) is mapped to PCI mmio
 	 * we need to map 1G-128k - 1G (0x38000000 - 0x3fffffff) to CS1 */


 	/* SRAM = GPCS3 128k @ d0000-effff*/
 	write_mmcr_long(SC520_PAR2,  0x4e00400d);

 	/* IDE0 = GPCS6 1f0-1f7 */
 	write_mmcr_long(SC520_PAR3,  0x380801f0);

 	/* IDE1 = GPCS7 3f6 */
 	write_mmcr_long(SC520_PAR4,  0x3c0003f6);
 	/* bootcs */
 	write_mmcr_long(SC520_PAR12, 0x8bffe800);
 	/* romcs2 */
 	write_mmcr_long(SC520_PAR13, 0xcbfff000);
 	/* romcs1 */
 	write_mmcr_long(SC520_PAR14, 0xabfff800);
 	/* 680 LEDS */
 	write_mmcr_long(SC520_PAR15, 0x30000640);

 	asm ("wbinvd\n"); /* Flush cache, req. after setting the unchached attribute ona PAR */

 	if (CFG_USE_SIO_UART) {
 		write_mmcr_byte(SC520_ADDDECCTL, read_mmcr_byte(SC520_ADDDECCTL) | UART2_DIS|UART1_DIS);
 		setup_ali_sio(1);
 	} else {
 		write_mmcr_byte(SC520_ADDDECCTL, read_mmcr_byte(SC520_ADDDECCTL) & ~(UART2_DIS|UART1_DIS));
 		setup_ali_sio(0);
 		silence_uart(0x3e8);
 		silence_uart(0x2e8);
 	}

 }


 /*
  * Miscelaneous platform dependent initialisations
  */

 int board_init(void)
 {
 	DECLARE_GLOBAL_DATA_PTR;

 	init_sc520();
 	bus_init();
 	irq_init();

 	/* max drive current on SDRAM */
 	write_mmcr_word(SC520_DSCTL, 0x0100);

 	/* enter debug mode after next reset (only if jumper is also set) */
 	write_mmcr_byte(SC520_RESCFG, 0x08);

 	/* configure the software timer to 33.333MHz */
 	write_mmcr_byte(SC520_SWTMRCFG, 0);
 	gd->bus_clk = 33333000;

 	return 0;
 }

 int dram_init(void)
 {
 	init_sc520_dram();
 	return 0;
 }

 void show_boot_progress(int val)
 {
 	outb(val&0xff, 0x80);
 	outb((val&0xff00)>>8, 0x680);
 }


 int last_stage_init(void)
 {
 	int minor;
 	int major;

 	major = minor = 0;
 	major |= ali512x_cio_in(23)?2:0;
 	major |= ali512x_cio_in(22)?1:0;
 	minor |= ali512x_cio_in(21)?2:0;
 	minor |= ali512x_cio_in(20)?1:0;

 	printf("AMD SC520 CDP revision %d.%d\n", major, minor);

 	return 0;
 }
	/*
	* (C) Copyright 2002
	* Daniel Engström, Omicron Ceti AB <daniel@omicron.se>.
	*
	* 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 <pci.h>
	#include <asm/io.h>
	#include <asm/ic/sc520.h>
	#include <asm/ic/ali512x.h>

	/* ------------------------------------------------------------------------- */

	static void irq_init(void)
	{

	/* disable global interrupt mode */
	write_mmcr_byte(SC520_PICICR, 0x40);

	/* set irq0-7 to edge */
	write_mmcr_byte(SC520_MPICMODE, 0x00);

	/* set irq9-12 to level, all the other (8, 13-15) are edge */
	write_mmcr_byte(SC520_SL1PICMODE, 0x1e);

	/* set irq16-24 (unused slave pic2) to level */
	write_mmcr_byte(SC520_SL2PICMODE, 0xff);

	/* active low polarity on PIC interrupt pins,
	active high polarity on all other irq pins */
	write_mmcr_word(SC520_INTPINPOL, 0);

	/* set irq number mapping */
	write_mmcr_byte(SC520_GPTMR0MAP,0); /* disable GP timer 0 INT */
	write_mmcr_byte(SC520_GPTMR1MAP,0); /* disable GP timer 1 INT */
	write_mmcr_byte(SC520_GPTMR2MAP,0); /* disable GP timer 2 INT */
	write_mmcr_byte(SC520_PIT0MAP,0x1); /* Set PIT timer 0 INT to IRQ0 */
	write_mmcr_byte(SC520_PIT1MAP,0); /* diable PIT timer 1 INT */
	write_mmcr_byte(SC520_PIT2MAP,0); /* diable PIT timer 2 INT */
	write_mmcr_byte(SC520_PCIINTAMAP,0x4); /* Set PCI INT A to IRQ9 */
	write_mmcr_byte(SC520_PCIINTBMAP,0x5); /* Set PCI INT B to IRQ10 */
	write_mmcr_byte(SC520_PCIINTCMAP,0x6); /* Set PCI INT C to IRQ11 */
	write_mmcr_byte(SC520_PCIINTDMAP,0x7); /* Set PCI INT D to IRQ12 */
	write_mmcr_byte(SC520_DMABCINTMAP,0); /* disable DMA INT */
	write_mmcr_byte(SC520_SSIMAP,0); /* disable Synchronius serial INT */
	write_mmcr_byte(SC520_WDTMAP,0); /* disable Watchdor INT */
	write_mmcr_byte(SC520_RTCMAP,0x3); /* Set RTC int to 8 */
	write_mmcr_byte(SC520_WPVMAP,0); /* disable write protect INT */
	write_mmcr_byte(SC520_ICEMAP,0x2); /* Set ICE Debug Serielport INT to IRQ1 */
	write_mmcr_byte(SC520_FERRMAP,0x8); /* Set FP error INT to IRQ13 */
	write_mmcr_byte(SC520_GP0IMAP,6); /* Set GPIRQ0 (ISA IRQ2) to IRQ9 */
	write_mmcr_byte(SC520_GP1IMAP,2); /* Set GPIRQ1 (SIO IRQ1) to IRQ1 */
	write_mmcr_byte(SC520_GP2IMAP,7); /* Set GPIRQ2 (ISA IRQ12) to IRQ12 */

	if (CFG_USE_SIO_UART) {
	write_mmcr_byte(SC520_UART1MAP,0); /* disable internal UART1 INT */
	write_mmcr_byte(SC520_UART2MAP,0); /* disable internal UART2 INT */
	write_mmcr_byte(SC520_GP3IMAP,11); /* Set GPIRQ3 (ISA IRQ3) to IRQ3 */
	write_mmcr_byte(SC520_GP4IMAP,12); /* Set GPIRQ4 (ISA IRQ4) to IRQ4 */
	} else {
	write_mmcr_byte(SC520_UART1MAP,12); /* Set internal UART2 INT to IRQ4 */
	write_mmcr_byte(SC520_UART2MAP,11); /* Set internal UART2 INT to IRQ3 */
	write_mmcr_byte(SC520_GP3IMAP,0); /* disable GPIRQ3 (ISA IRQ3) */
	write_mmcr_byte(SC520_GP4IMAP,0); /* disable GPIRQ4 (ISA IRQ4) */
	}

	write_mmcr_byte(SC520_GP5IMAP,13); /* Set GPIRQ5 (ISA IRQ5) to IRQ5 */
	write_mmcr_byte(SC520_GP6IMAP,21); /* Set GPIRQ6 (ISA IRQ6) to IRQ6 */
	write_mmcr_byte(SC520_GP7IMAP,22); /* Set GPIRQ7 (ISA IRQ7) to IRQ7 */
	write_mmcr_byte(SC520_GP8IMAP,3); /* Set GPIRQ8 (SIO IRQ8) to IRQ8 */
	write_mmcr_byte(SC520_GP9IMAP,4); /* Set GPIRQ9 (ISA IRQ9) to IRQ9 */
	write_mmcr_byte(SC520_GP10IMAP,9); /* Set GPIRQ10 (ISA IRQ10) to IRQ10 */
	write_mmcr_word(SC520_PCIHOSTMAP,0x11f); /* Map PCI hostbridge INT to NMI */
	write_mmcr_word(SC520_ECCMAP,0x100); /* Map SDRAM ECC failure INT to NMI */

	}

	/* PCI stuff */
	static void pci_sc520_cdp_fixup_irq(struct pci_controller *hose, pci_dev_t dev)
	{
	char pin;
	int irq;


	pci_hose_read_config_byte(hose, dev, PCI_INTERRUPT_PIN, &pin);
	irq = pin-1;

	switch (PCI_DEV(dev)) {
	case 20:
	break;
	case 19:
	irq+=1;
	break;
	case 18:
	irq+=2;
	break;
	case 17:
	irq+=3;
	break;
	default:
	return;
	}

	irq&=3; /* wrap around */
	irq+=9; /* lowest IRQ is 9 */

	pci_hose_write_config_byte(hose, dev, PCI_INTERRUPT_LINE, irq);
	#if 0
	printf("fixup_irq: device %d pin %c irq %d\n",
	PCI_DEV(dev), 'A' + pin -1, irq);
	#endif
	}

	static struct pci_controller sc520_cdp_hose = {
	fixup_irq: pci_sc520_cdp_fixup_irq,
	};

	void pci_init_board(void)
	{
	pci_sc520_init(&sc520_cdp_hose);
	}


	static void silence_uart(int port)
	{
	outb(0, port+1);
	}

	void setup_ali_sio(int uart_primary)
	{
	ali512x_init();

	ali512x_set_fdc(ALI_ENABLED, 0x3f2, 6, 0);
	ali512x_set_pp(ALI_ENABLED, 0x278, 7, 3);
	ali512x_set_uart(ALI_ENABLED, ALI_UART1, uart_primary?0x3f8:0x3e8, 4);
	ali512x_set_uart(ALI_ENABLED, ALI_UART2, uart_primary?0x2f8:0x2e8, 3);
	ali512x_set_rtc(ALI_DISABLED, 0, 0);
	ali512x_set_kbc(ALI_ENABLED, 1, 12);
	ali512x_set_cio(ALI_ENABLED);

	/* IrDa pins */
	ali512x_cio_function(12, 1, 0, 0);
	ali512x_cio_function(13, 1, 0, 0);

	/* SSI chip select pins */
	ali512x_cio_function(14, 0, 0, 0); /* SSI_CS */
	ali512x_cio_function(15, 0, 0, 0); /* SSI_MV */
	ali512x_cio_function(16, 0, 1, 0); /* SSI_SPI# (inverted) */

	/* Board REV pins */
	ali512x_cio_function(20, 0, 0, 1);
	ali512x_cio_function(21, 0, 0, 1);
	ali512x_cio_function(22, 0, 0, 1);
	ali512x_cio_function(23, 0, 0, 1);
	}


	/* set up the ISA bus timing and system address mappings */
	static void bus_init(void)
	{

	/* set up the GP IO pins */
	write_mmcr_word(SC520_PIOPFS31_16, 0xf7ff); /* set the GPIO pin function 31-16 reg */
	write_mmcr_word(SC520_PIOPFS15_0, 0xffff); /* set the GPIO pin function 15-0 reg */
	write_mmcr_byte(SC520_CSPFS, 0xf8); /* set the CS pin function reg */
	write_mmcr_byte(SC520_CLKSEL, 0x70);


	write_mmcr_byte(SC520_GPCSRT, 1); /* set the GP CS offset */
	write_mmcr_byte(SC520_GPCSPW, 3); /* set the GP CS pulse width */
	write_mmcr_byte(SC520_GPCSOFF, 1); /* set the GP CS offset */
	write_mmcr_byte(SC520_GPRDW, 3); /* set the RD pulse width */
	write_mmcr_byte(SC520_GPRDOFF, 1); /* set the GP RD offset */
	write_mmcr_byte(SC520_GPWRW, 3); /* set the GP WR pulse width */
	write_mmcr_byte(SC520_GPWROFF, 1); /* set the GP WR offset */

	write_mmcr_word(SC520_BOOTCSCTL, 0x1823); /* set up timing of BOOTCS */
	write_mmcr_word(SC520_ROMCS1CTL, 0x1823); /* set up timing of ROMCS1 */
	write_mmcr_word(SC520_ROMCS2CTL, 0x1823); /* set up timing of ROMCS2 */

	/* adjust the memory map:
	* by default the first 256MB (0x00000000 - 0x0fffffff) is mapped to SDRAM
	* and 256MB to 1G-128k (0x1000000 - 0x37ffffff) is mapped to PCI mmio
	* we need to map 1G-128k - 1G (0x38000000 - 0x3fffffff) to CS1 */


	/* SRAM = GPCS3 128k @ d0000-effff*/
	write_mmcr_long(SC520_PAR2, 0x4e00400d);

	/* IDE0 = GPCS6 1f0-1f7 */
	write_mmcr_long(SC520_PAR3, 0x380801f0);

	/* IDE1 = GPCS7 3f6 */
	write_mmcr_long(SC520_PAR4, 0x3c0003f6);
	/* bootcs */
	write_mmcr_long(SC520_PAR12, 0x8bffe800);
	/* romcs2 */
	write_mmcr_long(SC520_PAR13, 0xcbfff000);
	/* romcs1 */
	write_mmcr_long(SC520_PAR14, 0xabfff800);
	/* 680 LEDS */
	write_mmcr_long(SC520_PAR15, 0x30000640);

	asm ("wbinvd\n"); /* Flush cache, req. after setting the unchached attribute ona PAR */

	if (CFG_USE_SIO_UART) {
	write_mmcr_byte(SC520_ADDDECCTL, read_mmcr_byte(SC520_ADDDECCTL) \| UART2_DIS\|UART1_DIS);
	setup_ali_sio(1);
	} else {
	write_mmcr_byte(SC520_ADDDECCTL, read_mmcr_byte(SC520_ADDDECCTL) & ~(UART2_DIS\|UART1_DIS));
	setup_ali_sio(0);
	silence_uart(0x3e8);
	silence_uart(0x2e8);
	}

	}



	/*
	* Miscelaneous platform dependent initialisations
	*/

	int board_init(void)
	{
	DECLARE_GLOBAL_DATA_PTR;

	init_sc520();
	bus_init();
	irq_init();

	/* max drive current on SDRAM */
	write_mmcr_word(SC520_DSCTL, 0x0100);

	/* enter debug mode after next reset (only if jumper is also set) */
	write_mmcr_byte(SC520_RESCFG, 0x08);

	/* configure the software timer to 33.333MHz */
	write_mmcr_byte(SC520_SWTMRCFG, 0);
	gd->bus_clk = 33333000;

	return 0;
	}

	int dram_init(void)
	{
	init_sc520_dram();
	return 0;
	}

	void show_boot_progress(int val)
	{
	outb(val&0xff, 0x80);
	outb((val&0xff00)>>8, 0x680);
	}


	int last_stage_init(void)
	{
	int minor;
	int major;

	major = minor = 0;
	major \|= ali512x_cio_in(23)?2:0;
	major \|= ali512x_cio_in(22)?1:0;
	minor \|= ali512x_cio_in(21)?2:0;
	minor \|= ali512x_cio_in(20)?1:0;

	printf("AMD SC520 CDP revision %d.%d\n", major, minor);

	return 0;
	}