/*
* mbus.h: Various defines for MBUS modules.
*
* Copyright (C) 1995 David S. Miller ([email protected])
*/

#ifndef _SPARC_MBUS_H
#define _SPARC_MBUS_H

#include <asm/ross.h> /* HyperSparc stuff */
#include <asm/viking.h> /* Ugh, bug city... */

enum mbus_module {
HyperSparc = 0,
Swift_ok = 4,
Swift_bad_c = 5,
Swift_lots_o_bugs = 6,
Tsunami = 7,
Viking_12 = 8,
Viking_2x = 9,
Viking_30 = 10,
Viking_35 = 11,
Viking_new = 12,
TurboSparc = 13,
SRMMU_INVAL_MOD = 14,
};

extern enum mbus_module srmmu_modtype;
extern unsigned int viking_rev, swift_rev, cypress_rev;

/* HW Mbus module bugs we have to deal with */
#define HWBUG_COPYBACK_BROKEN 0x00000001
#define HWBUG_ASIFLUSH_BROKEN 0x00000002
#define HWBUG_VACFLUSH_BITROT 0x00000004
#define HWBUG_KERN_ACCBROKEN 0x00000008
#define HWBUG_KERN_CBITBROKEN 0x00000010
#define HWBUG_MODIFIED_BITROT 0x00000020
#define HWBUG_PC_BADFAULT_ADDR 0x00000040
#define HWBUG_SUPERSCALAR_BAD 0x00000080
#define HWBUG_PACINIT_BITROT 0x00000100

/* First the module type values. To find out which you have, just load
* the mmu control register from ASI_M_MMUREG alternate address space and
* shift the value right 28 bits.
*/
/* IMPL field means the company which produced the chip. */
#define MBUS_VIKING 0x4 /* bleech, Texas Instruments Module */
#define MBUS_LSI 0x3 /* LSI Logics */
#define MBUS_ROSS 0x1 /* Ross is nice */
#define MBUS_FMI 0x0 /* Fujitsu Microelectronics/Swift */

/* Ross Module versions */
#define ROSS_604_REV_CDE 0x0 /* revisions c, d, and e */
#define ROSS_604_REV_F 0x1 /* revision f */
#define ROSS_605 0xf /* revision a, a.1, and a.2 */
#define ROSS_605_REV_B 0xe /* revision b */

/* TI Viking Module versions */
#define VIKING_REV_12 0x1 /* Version 1.2 or SPARCclassic's CPU */
#define VIKING_REV_2 0x2 /* Version 2.1, 2.2, 2.3, and 2.4 */
#define VIKING_REV_30 0x3 /* Version 3.0 */
#define VIKING_REV_35 0x4 /* Version 3.5 */

/* LSI Logics. */
#define LSI_L64815 0x0

/* Fujitsu */
#define FMI_AURORA 0x4 /* MB8690x, a Swift module... */
#define FMI_TURBO 0x5 /* MB86907, a TurboSparc module... */

/* For multiprocessor support we need to be able to obtain the CPU id and
* the MBUS Module id.
*/

/* The CPU ID is encoded in the trap base register, 20 bits to the left of
* bit zero, with 2 bits being significant.
*/
#define TBR_ID_SHIFT 20

static inline int get_cpuid(void)
{
register int retval;
__asm__ __volatile__("rd %%tbr, %0\n\t"
"srl %0, %1, %0\n\t" :
"=r" (retval) :
"i" (TBR_ID_SHIFT));
return (retval & 3);
}

static inline int get_modid(void)
{
return (get_cpuid() | 0x8);
}


#endif /* !(_SPARC_MBUS_H) */