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 * This file is subject to the terms and conditions of the GNU General Public
 * License. See the file "COPYING" in the main directory of this archive
 * for more details.
 * mc.h: Definitions for SGI Memory Controller
 * Copyright (C) 1996 David S. Miller
 * Copyright (C) 1999 Ralf Baechle
 * Copyright (C) 1999 Silicon Graphics, Inc.

#ifndef _SGI_MC_H
#define _SGI_MC_H

struct sgimc_regs {
      u32 _unused0;
      volatile u32 cpuctrl0;  /* CPU control register 0, readwrite */
#define SGIMC_CCTRL0_REFS     0x0000000f /* REFS mask */
#define SGIMC_CCTRL0_EREFRESH 0x00000010 /* Memory refresh enable */
#define SGIMC_CCTRL0_EPERRGIO 0x00000020 /* GIO parity error enable */
#define SGIMC_CCTRL0_EPERRMEM 0x00000040 /* Main mem parity error enable */
#define SGIMC_CCTRL0_EPERRCPU 0x00000080 /* CPU bus parity error enable */
#define SGIMC_CCTRL0_WDOG     0x00000100 /* Watchdog timer enable */
#define SGIMC_CCTRL0_SYSINIT  0x00000200 /* System init bit */
#define SGIMC_CCTRL0_GFXRESET 0x00000400 /* Graphics interface reset */
#define SGIMC_CCTRL0_EISALOCK 0x00000800 /* Lock CPU from memory for EISA */
#define SGIMC_CCTRL0_EPERRSCMD      0x00001000 /* SysCMD bus parity error enable */
#define SGIMC_CCTRL0_IENAB    0x00002000 /* Allow interrupts from MC */
#define SGIMC_CCTRL0_ESNOOP   0x00004000 /* Snooping I/O enable */
#define SGIMC_CCTRL0_EPROMWR  0x00008000 /* Prom writes from cpu enable */
#define SGIMC_CCTRL0_WRESETPMEM     0x00010000 /* Perform warm reset, preserves mem */
#define SGIMC_CCTRL0_LENDIAN  0x00020000 /* Put MC in little-endian mode */
#define SGIMC_CCTRL0_WRESETDMEM     0x00040000 /* Warm reset, destroys mem contents */
#define SGIMC_CCTRL0_CMEMBADPAR     0x02000000 /* Generate bad perr from cpu to mem */
#define SGIMC_CCTRL0_R4KNOCHKPARR 0x04000000 /* Don't chk parity on mem data reads */
#define SGIMC_CCTRL0_GIOBTOB  0x08000000 /* Allow GIO back to back writes */
      u32 _unused1;
      volatile u32 cpuctrl1;  /* CPU control register 1, readwrite */
#define SGIMC_CCTRL1_EGIOTIMEO      0x00000010 /* GIO bus timeout enable */
#define SGIMC_CCTRL1_FIXEDEHPC      0x00001000 /* Fixed HPC endianness */
#define SGIMC_CCTRL1_LITTLEHPC      0x00002000 /* Little endian HPC */
#define SGIMC_CCTRL1_FIXEDEEXP0     0x00004000 /* Fixed EXP0 endianness */
#define SGIMC_CCTRL1_LITTLEEXP0     0x00008000 /* Little endian EXP0 */
#define SGIMC_CCTRL1_FIXEDEEXP1     0x00010000 /* Fixed EXP1 endianness */
#define SGIMC_CCTRL1_LITTLEEXP1     0x00020000 /* Little endian EXP1 */

      u32 _unused2;
      volatile u32 watchdogt; /* Watchdog reg rdonly, write clears */

      u32 _unused3;
      volatile u32 systemid;  /* MC system ID register, readonly */
#define SGIMC_SYSID_MASKREV   0x0000000f /* Revision of MC controller */
#define SGIMC_SYSID_EPRESENT  0x00000010 /* Indicates presence of EISA bus */

      u32 _unused4[3];
      volatile u32 divider;   /* Divider reg for RPSS */

      u32 _unused5;
      u32 eeprom;       /* EEPROM byte reg for r4k */
#define SGIMC_EEPROM_PRE      0x00000001 /* eeprom chip PRE pin assertion */
#define SGIMC_EEPROM_CSEL     0x00000002 /* Active high, eeprom chip select */
#define SGIMC_EEPROM_SECLOCK  0x00000004 /* EEPROM serial clock */
#define SGIMC_EEPROM_SDATAO   0x00000008 /* Serial EEPROM data-out */
#define SGIMC_EEPROM_SDATAI   0x00000010 /* Serial EEPROM data-in */

      u32 _unused6[3];
      volatile u32 rcntpre;   /* Preload refresh counter */

      u32 _unused7;
      volatile u32 rcounter;  /* Readonly refresh counter */

      u32 _unused8[13];
      volatile u32 giopar;    /* Parameter word for GIO64 */
#define SGIMC_GIOPAR_HPC64    0x00000001 /* HPC talks to GIO using 64-bits */
#define SGIMC_GIOPAR_GFX64    0x00000002 /* GFX talks to GIO using 64-bits */
#define SGIMC_GIOPAR_EXP064   0x00000004 /* EXP(slot0) talks using 64-bits */
#define SGIMC_GIOPAR_EXP164   0x00000008 /* EXP(slot1) talks using 64-bits */
#define SGIMC_GIOPAR_EISA64   0x00000010 /* EISA bus talks 64-bits to GIO */
#define SGIMC_GIOPAR_HPC264   0x00000020 /* 2nd HPX talks 64-bits to GIO */
#define SGIMC_GIOPAR_RTIMEGFX 0x00000040 /* GFX device has realtime attr */
#define SGIMC_GIOPAR_RTIMEEXP0      0x00000080 /* EXP(slot0) has realtime attr */
#define SGIMC_GIOPAR_RTIMEEXP1      0x00000100 /* EXP(slot1) has realtime attr */
#define SGIMC_GIOPAR_MASTEREISA     0x00000200 /* EISA bus can act as bus master */
#define SGIMC_GIOPAR_ONEBUS   0x00000400 /* Exists one GIO64 pipelined bus */
#define SGIMC_GIOPAR_MASTERGFX      0x00000800 /* GFX can act as a bus master */
#define SGIMC_GIOPAR_MASTEREXP0     0x00001000 /* EXP(slot0) can bus master */
#define SGIMC_GIOPAR_MASTEREXP1     0x00002000 /* EXP(slot1) can bus master */
#define SGIMC_GIOPAR_PLINEEXP0      0x00004000 /* EXP(slot0) has pipeline attr */
#define SGIMC_GIOPAR_PLINEEXP1      0x00008000 /* EXP(slot1) has pipeline attr */

      u32 _unused9;
      volatile u32 cputp;     /* CPU bus arb time period */

      u32 _unused10[3];
      volatile u32 lbursttp;  /* Time period for long bursts */

      /* MC chip can drive up to 4 bank 4 SIMMs each. All SIMMs in bank must
       * be the same size. The size encoding for supported SIMMs is bellow */
      u32 _unused11[9];
      volatile u32 mconfig0;  /* Memory config register zero */
      u32 _unused12;
      volatile u32 mconfig1;  /* Memory config register one */
#define SGIMC_MCONFIG_BASEADDR      0x000000ff /* Base address of bank*/
#define SGIMC_MCONFIG_RMASK   0x00001f00 /* Ram config bitmask */
#define SGIMC_MCONFIG_BVALID  0x00002000 /* Bank is valid */
#define SGIMC_MCONFIG_SBANKS  0x00004000 /* Number of subbanks */

      u32 _unused13;
      volatile u32 cmacc;        /* Mem access config for CPU */
      u32 _unused14;
      volatile u32 gmacc;        /* Mem access config for GIO */

      /* This define applies to both cmacc and gmacc registers above. */
#define SGIMC_MACC_ALIASBIG   0x20000000 /* 512MB home for alias */

      /* Error address/status regs from GIO and CPU perspectives. */
      u32 _unused15;
      volatile u32 cerr;      /* Error address reg for CPU */
      u32 _unused16;
      volatile u32 cstat;     /* Status reg for CPU */
#define SGIMC_CSTAT_RD        0x00000100 /* read parity error */
#define SGIMC_CSTAT_PAR       0x00000200 /* CPU parity error */
#define SGIMC_CSTAT_ADDR      0x00000400 /* memory bus error bad addr */
#define SGIMC_CSTAT_SYSAD_PAR 0x00000800 /* sysad parity error */
#define SGIMC_CSTAT_SYSCMD_PAR      0x00001000 /* syscmd parity error */
#define SGIMC_CSTAT_BAD_DATA  0x00002000 /* bad data identifier */
#define SGIMC_CSTAT_PAR_MASK  0x00001f00 /* parity error mask */

      u32 _unused17;
      volatile u32 gerr;      /* Error address reg for GIO */
      u32 _unused18;
      volatile u32 gstat;     /* Status reg for GIO */
#define SGIMC_GSTAT_RD        0x00000100 /* read parity error */
#define SGIMC_GSTAT_WR        0x00000200 /* write parity error */
#define SGIMC_GSTAT_TIME      0x00000400 /* GIO bus timed out */
#define SGIMC_GSTAT_PROM      0x00000800 /* write to PROM when PROM_EN not set */
#define SGIMC_GSTAT_ADDR      0x00001000 /* parity error on addr cycle */
#define SGIMC_GSTAT_BC        0x00002000 /* parity error on byte count cycle */
#define SGIMC_GSTAT_PIO_RD    0x00004000 /* read data parity on pio */
#define SGIMC_GSTAT_PIO_WR    0x00008000 /* write data parity on pio */

      /* Special hard bus locking registers. */
      u32 _unused19;
      volatile u32 syssembit;       /* Uni-bit system semaphore */
      u32 _unused20;
      volatile u32 mlock;           /* Global GIO memory access lock */
      u32 _unused21;
      volatile u32 elock;           /* Locks EISA from GIO accesses */

      /* GIO dma control registers. */
      u32 _unused22[15];
      volatile u32 gio_dma_trans;   /* DMA mask to translation GIO addrs */
      u32 _unused23;
      volatile u32 gio_dma_sbits;   /* DMA GIO addr substitution bits */
      u32 _unused24;
      volatile u32 dma_intr_cause;  /* DMA IRQ cause indicator bits */
      u32 _unused25;
      volatile u32 dma_ctrl;        /* Main DMA control reg */

      /* DMA TLB entry 0 */
      u32 _unused26[5];
      volatile u32 dtlb_hi0;
      u32 _unused27;
      volatile u32 dtlb_lo0;

      /* DMA TLB entry 1 */
      u32 _unused28;
      volatile u32 dtlb_hi1;
      u32 _unused29;
      volatile u32 dtlb_lo1;

      /* DMA TLB entry 2 */
      u32 _unused30;
      volatile u32 dtlb_hi2;
      u32 _unused31;
      volatile u32 dtlb_lo2;

      /* DMA TLB entry 3 */
      u32 _unused32;
      volatile u32 dtlb_hi3;
      u32 _unused33;
      volatile u32 dtlb_lo3;

      u32 _unused34[0x0392];

      u32 _unused35;
      volatile u32 rpsscounter;     /* Chirps at 100ns */

      u32 _unused36[0x1000/4-2*4];

      u32 _unused37;
      volatile u32 maddronly;       /* Address DMA goes at */
      u32 _unused38;
      volatile u32 maddrpdeflts;    /* Same as above, plus set defaults */
      u32 _unused39;
      volatile u32 dmasz;           /* DMA count */
      u32 _unused40;
      volatile u32 ssize;           /* DMA stride size */
      u32 _unused41;
      volatile u32 gmaddronly;      /* Set GIO DMA but don't start trans */
      u32 _unused42;
      volatile u32 dmaddnpgo;       /* Set GIO DMA addr + start transfer */
      u32 _unused43;
      volatile u32 dmamode;         /* DMA mode config bit settings */
      u32 _unused44;
      volatile u32 dmaccount;       /* Zoom and byte count for DMA */
      u32 _unused45;
      volatile u32 dmastart;        /* Pedal to the metal. */
      u32 _unused46;
      volatile u32 dmarunning;      /* DMA op is in progress */
      u32 _unused47;
      volatile u32 maddrdefstart;   /* Set dma addr, defaults, and kick it */

extern struct sgimc_regs *sgimc;
#define SGIMC_BASE            0x1fa00000  /* physical */

/* Base location of the two ram banks found in IP2[0268] machines. */
#define SGIMC_SEG0_BADDR      0x08000000
#define SGIMC_SEG1_BADDR      0x20000000

/* Maximum size of the above banks are per machine. */
#define SGIMC_SEG0_SIZE_ALL         0x10000000 /* 256MB */
#define SGIMC_SEG1_SIZE_IP20_IP22   0x08000000 /* 128MB */
#define SGIMC_SEG1_SIZE_IP26_IP28   0x20000000 /* 512MB */

extern void sgimc_init(void);

#endif /* _SGI_MC_H */

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