src/mainboard/via/epia/romstage.c

#include <stdint.h>
#include <device/pci_def.h>
#include <arch/io.h>
#include <device/pnp_def.h>
#include <arch/hlt.h>
#include <stdlib.h>
#include <console/console.h>
#include "northbridge/via/vt8601/raminit.h"
#include "cpu/x86/mtrr/earlymtrr.c"
#include "cpu/x86/bist.h"
#include "drivers/pc80/udelay_io.c"
#include "lib/delay.c"
#include "lib/debug.c"
#include "southbridge/via/vt8231/early_smbus.c"
#include "southbridge/via/vt8231/early_serial.c"
#include "southbridge/via/vt8231/enable_rom.c"

static inline int spd_read_byte(unsigned device, unsigned address)
{
	return smbus_read_byte(device, address);
}

#include "northbridge/via/vt8601/raminit.c"

static void enable_mainboard_devices(void)
{
	device_t dev;
	/* dev 0 for southbridge */

	dev = pci_locate_device(PCI_ID(0x1106,0x8231), 0);

	if (dev == PCI_DEV_INVALID)
		die("Southbridge not found!!!\n");

	pci_write_config8(dev, 0x50, 7);
	pci_write_config8(dev, 0x51, 0xff);
#if 0
	// This early setup switches IDE into compatibility mode before PCI gets
	// a chance to assign I/Os
	//   movl    $CONFIG_ADDR(0, 0x89, 0x42), %eax
	//   movb    $0x09, %dl
	//   movb    $0x00, %dl
	//   PCI_WRITE_CONFIG_BYTE
	//
#endif
	/* we do this here as in V2, we can not yet do raw operations
	 * to pci!
	 */
	/* changed this to work correctly on later revisions of LB.
	* The original dev += 0x100; stopped working. It also appears
	* that if this is not set here, but in ide_init() only, the IDE
	* does not work at all. I assume it needs to be set before something else,
	* possibly before enabling the IDE peripheral, or it is a timing issue.
	* Ben Hewson 29 Apr 2007.
	*/

	dev = pci_locate_device(PCI_ID(0x1106,0x0571), 0);
	pci_write_config8(dev, 0x42, 0);
}

static void enable_shadow_ram(void)
{
	device_t dev = 0;
	unsigned char shadowreg;

	shadowreg = pci_read_config8(dev, 0x63);
	/* 0xf0000-0xfffff */
	shadowreg |= 0x30;
	pci_write_config8(dev, 0x63, shadowreg);
}

static void main(unsigned long bist)
{
	if (bist == 0)
		early_mtrr_init();

	enable_vt8231_serial();
	console_init();

	/* Halt if there was a built in self test failure */
	report_bist_failure(bist);

	vt8231_enable_rom();
	enable_mainboard_devices();
	enable_smbus();
	enable_shadow_ram();

	/*
	  this is way more generic than we need.
	  sdram_initialize(ARRAY_SIZE(cpu), cpu);
	*/
	sdram_set_registers((const struct mem_controller *) 0);
	sdram_set_spd_registers((const struct mem_controller *) 0);
	sdram_enable(0, (const struct mem_controller *) 0);
}