#ifndef __ALPHA_TITAN__H__
#define __ALPHA_TITAN__H__

#include <linux/types.h>
#include <asm/compiler.h>

/*
 * TITAN is the internal names for a core logic chipset which provides
 * memory controller and PCI/AGP access for 21264 based systems.
 *
 * This file is based on:
 *
 * Titan Chipset Engineering Specification
 * Revision 0.12
 * 13 July 1999
 *
 */

/* XXX: Do we need to conditionalize on this?  */
#ifdef USE_48_BIT_KSEG
#define TI_BIAS 0x80000000000UL
#else
#define TI_BIAS 0x10000000000UL
#endif

/*
 * CChip, DChip, and PChip registers
 */

typedef struct {
	volatile unsigned long csr __attribute__((aligned(64)));
} titan_64;

typedef struct {
	titan_64	csc;
	titan_64	mtr;
	titan_64	misc;
	titan_64	mpd;
	titan_64	aar0;
	titan_64	aar1;
	titan_64	aar2;
	titan_64	aar3;
	titan_64	dim0;
	titan_64	dim1;
	titan_64	dir0;
	titan_64	dir1;
	titan_64	drir;
	titan_64	prben;
	titan_64	iic0;
	titan_64	iic1;
	titan_64	mpr0;
	titan_64	mpr1;
	titan_64	mpr2;
	titan_64	mpr3;
	titan_64	rsvd[2];
	titan_64	ttr;
	titan_64	tdr;
	titan_64	dim2;
	titan_64	dim3;
	titan_64	dir2;
	titan_64	dir3;
	titan_64	iic2;
	titan_64	iic3;
	titan_64	pwr;
	titan_64	reserved[17];
	titan_64	cmonctla;
	titan_64	cmonctlb;
	titan_64	cmoncnt01;
	titan_64	cmoncnt23;
	titan_64	cpen;
} titan_cchip;

typedef struct {
	titan_64	dsc;
	titan_64	str;
	titan_64	drev;
	titan_64	dsc2;
} titan_dchip;

typedef struct {
	titan_64	wsba[4];
	titan_64	wsm[4];
	titan_64	tba[4];
	titan_64	pctl;
	titan_64	plat;
	titan_64	reserved0[2];
	union {
		struct {
			titan_64	serror;
			titan_64	serren;
			titan_64	serrset;
			titan_64	reserved0;
			titan_64	gperror;
			titan_64	gperren;
			titan_64	gperrset;
			titan_64	reserved1;
			titan_64	gtlbiv;
			titan_64	gtlbia;
			titan_64	reserved2[2];
			titan_64	sctl;
			titan_64	reserved3[3];
		} g;
		struct {
			titan_64	agperror;
			titan_64	agperren;
			titan_64	agperrset;
			titan_64	agplastwr;
			titan_64	aperror;
			titan_64	aperren;
			titan_64	aperrset;
			titan_64	reserved0;
			titan_64	atlbiv;
			titan_64	atlbia;
			titan_64	reserved1[6];
		} a;
	} port_specific;
	titan_64	sprst;
	titan_64	reserved1[31];
} titan_pachip_port;

typedef struct {
	titan_pachip_port	g_port;
	titan_pachip_port	a_port;
} titan_pachip;

#define TITAN_cchip	((titan_cchip  *)(IDENT_ADDR+TI_BIAS+0x1A0000000UL))
#define TITAN_dchip    	((titan_dchip  *)(IDENT_ADDR+TI_BIAS+0x1B0000800UL))
#define TITAN_pachip0 	((titan_pachip *)(IDENT_ADDR+TI_BIAS+0x180000000UL))
#define TITAN_pachip1 	((titan_pachip *)(IDENT_ADDR+TI_BIAS+0x380000000UL))
extern unsigned TITAN_agp;
extern int TITAN_bootcpu;

/*
 * TITAN PA-chip Window Space Base Address register.
 * (WSBA[0-2])
 */
#define wsba_m_ena 0x1                
#define wsba_m_sg 0x2
#define wsba_m_addr 0xFFF00000  
#define wmask_k_sz1gb 0x3FF00000                   
union TPAchipWSBA {
	struct  {
		unsigned wsba_v_ena : 1;
		unsigned wsba_v_sg : 1;
		unsigned wsba_v_rsvd1 : 18;
		unsigned wsba_v_addr : 12;
		unsigned wsba_v_rsvd2 : 32;
        } wsba_r_bits;
	int wsba_q_whole [2];
};

/*
 * TITAN PA-chip Control Register
 * This definition covers both the G-Port GPCTL and the A-PORT APCTL.
 * Bits <51:0> are the same in both cases. APCTL<63:52> are only 
 * applicable to AGP.
 */
#define pctl_m_fbtb 			0x00000001
#define pctl_m_thdis 			0x00000002