include/asm-mips/dec/ioasic_addrs.h

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Definitions for the address map in the JUNKIO Asic
   7  *
   8  * Created with Information from:
   9  *
  10  * "DEC 3000 300/400/500/600/700/800/900 AXP Models System Programmer's Manual"
  11  *
  12  * and the Mach Sources
  13  *
  14  * Copyright (C) 199x  the Anonymous
  15  * Copyright (C) 2002, 2003  Maciej W. Rozycki
  16  */
  17
  18 #ifndef __ASM_MIPS_DEC_IOASIC_ADDRS_H
  19 #define __ASM_MIPS_DEC_IOASIC_ADDRS_H
  20
  21 #define IOASIC_SLOT_SIZE 0x00040000
  22
  23 /*
  24  * Address ranges decoded by the I/O ASIC for onboard devices.
  25  */
  26 #define IOASIC_SYS_ROM  (0*IOASIC_SLOT_SIZE)    /* system board ROM */
  27 #define IOASIC_IOCTL    (1*IOASIC_SLOT_SIZE)    /* I/O ASIC */
  28 #define IOASIC_ESAR     (2*IOASIC_SLOT_SIZE)    /* LANCE MAC address chip */
  29 #define IOASIC_LANCE    (3*IOASIC_SLOT_SIZE)    /* LANCE Ethernet */
  30 #define IOASIC_SCC0     (4*IOASIC_SLOT_SIZE)    /* SCC #0 */
  31 #define IOASIC_VDAC_HI  (5*IOASIC_SLOT_SIZE)    /* VDAC (maxine) */
  32 #define IOASIC_SCC1     (6*IOASIC_SLOT_SIZE)    /* SCC #1 (3min, 3max+) */
  33 #define IOASIC_VDAC_LO  (7*IOASIC_SLOT_SIZE)    /* VDAC (maxine) */
  34 #define IOASIC_TOY      (8*IOASIC_SLOT_SIZE)    /* RTC */
  35 #define IOASIC_ISDN     (9*IOASIC_SLOT_SIZE)    /* ISDN (maxine) */
  36 #define IOASIC_ERRADDR  (9*IOASIC_SLOT_SIZE)    /* bus error address (3max+) */
  37 #define IOASIC_CHKSYN   (10*IOASIC_SLOT_SIZE)   /* ECC syndrome (3max+) */
  38 #define IOASIC_ACC_BUS  (10*IOASIC_SLOT_SIZE)   /* ACCESS.bus (maxine) */
  39 #define IOASIC_MCR      (11*IOASIC_SLOT_SIZE)   /* memory control (3max+) */
  40 #define IOASIC_FLOPPY   (11*IOASIC_SLOT_SIZE)   /* FDC (maxine) */
  41 #define IOASIC_SCSI     (12*IOASIC_SLOT_SIZE)   /* ASC SCSI */
  42 #define IOASIC_FDC_DMA  (13*IOASIC_SLOT_SIZE)   /* FDC DMA (maxine) */
  43 #define IOASIC_SCSI_DMA (14*IOASIC_SLOT_SIZE)   /* ??? */
  44 #define IOASIC_RES_15   (15*IOASIC_SLOT_SIZE)   /* unused? */
  45
  46
  47 /*
  48  * Offsets for I/O ASIC registers
  49  * (relative to (dec_kn_slot_base + IOASIC_IOCTL)).
  50  */
  51                                         /* all systems */
  52 #define IO_REG_SCSI_DMA_P       0x00    /* SCSI DMA Pointer */
  53 #define IO_REG_SCSI_DMA_BP      0x10    /* SCSI DMA Buffer Pointer */
  54 #define IO_REG_LANCE_DMA_P      0x20    /* LANCE DMA Pointer */
  55 #define IO_REG_SCC0A_T_DMA_P    0x30    /* SCC0A Transmit DMA Pointer */
  56 #define IO_REG_SCC0A_R_DMA_P    0x40    /* SCC0A Receive DMA Pointer */
  57
  58                                         /* except Maxine */
  59 #define IO_REG_SCC1A_T_DMA_P    0x50    /* SCC1A Transmit DMA Pointer */
  60 #define IO_REG_SCC1A_R_DMA_P    0x60    /* SCC1A Receive DMA Pointer */
  61
  62                                         /* Maxine */
  63 #define IO_REG_AB_T_DMA_P       0x50    /* ACCESS.bus Transmit DMA Pointer */
  64 #define IO_REG_AB_R_DMA_P       0x60    /* ACCESS.bus Receive DMA Pointer */
  65 #define IO_REG_FLOPPY_DMA_P     0x70    /* Floppy DMA Pointer */
  66 #define IO_REG_ISDN_T_DMA_P     0x80    /* ISDN Transmit DMA Pointer */
  67 #define IO_REG_ISDN_T_DMA_BP    0x90    /* ISDN Transmit DMA Buffer Pointer */
  68 #define IO_REG_ISDN_R_DMA_P     0xa0    /* ISDN Receive DMA Pointer */
  69 #define IO_REG_ISDN_R_DMA_BP    0xb0    /* ISDN Receive DMA Buffer Pointer */
  70
  71                                         /* all systems */
  72 #define IO_REG_DATA_0           0xc0    /* System Data Buffer 0 */
  73 #define IO_REG_DATA_1           0xd0    /* System Data Buffer 1 */
  74 #define IO_REG_DATA_2           0xe0    /* System Data Buffer 2 */
  75 #define IO_REG_DATA_3           0xf0    /* System Data Buffer 3 */
  76
  77                                         /* all systems */
  78 #define IO_REG_SSR              0x100   /* System Support Register */
  79 #define IO_REG_SIR              0x110   /* System Interrupt Register */
  80 #define IO_REG_SIMR             0x120   /* System Interrupt Mask Reg. */
  81 #define IO_REG_SAR              0x130   /* System Address Register */
  82
  83                                         /* Maxine */
  84 #define IO_REG_ISDN_T_DATA      0x140   /* ISDN Xmit Data Register */
  85 #define IO_REG_ISDN_R_DATA      0x150   /* ISDN Receive Data Register */
  86
  87                                         /* all systems */
  88 #define IO_REG_LANCE_SLOT       0x160   /* LANCE I/O Slot Register */
  89 #define IO_REG_SCSI_SLOT        0x170   /* SCSI Slot Register */
  90 #define IO_REG_SCC0A_SLOT       0x180   /* SCC0A DMA Slot Register */
  91
  92                                         /* except Maxine */
  93 #define IO_REG_SCC1A_SLOT       0x190   /* SCC1A DMA Slot Register */
  94
  95                                         /* Maxine */
  96 #define IO_REG_AB_SLOT          0x190   /* ACCESS.bus DMA Slot Register */
  97 #define IO_REG_FLOPPY_SLOT      0x1a0   /* Floppy Slot Register */
  98
  99                                         /* all systems */
 100 #define IO_REG_SCSI_SCR         0x1b0   /* SCSI Partial-Word DMA Control */
 101 #define IO_REG_SCSI_SDR0        0x1c0   /* SCSI DMA Partial Word 0 */
 102 #define IO_REG_SCSI_SDR1        0x1d0   /* SCSI DMA Partial Word 1 */
 103 #define IO_REG_FCTR             0x1e0   /* Free-Running Counter */
 104 #define IO_REG_RES_31           0x1f0   /* unused */
 105
 106
 107 /*
 108  * The upper 16 bits of the System Support Register are a part of the
 109  * I/O ASIC's internal DMA engine and thus are common to all I/O ASIC
 110  * machines.  The exception is the Maxine, which makes use of the
 111  * FLOPPY and ISDN bits (otherwise unused) and has a different SCC
 112  * wiring.
 113  */
 114                                                 /* all systems */
 115 #define IO_SSR_SCC0A_TX_DMA_EN  (1<<31)         /* SCC0A transmit DMA enable */
 116 #define IO_SSR_SCC0A_RX_DMA_EN  (1<<30)         /* SCC0A receive DMA enable */
 117 #define IO_SSR_RES_27           (1<<27)         /* unused */
 118 #define IO_SSR_RES_26           (1<<26)         /* unused */
 119 #define IO_SSR_RES_25           (1<<25)         /* unused */
 120 #define IO_SSR_RES_24           (1<<24)         /* unused */
 121 #define IO_SSR_RES_23           (1<<23)         /* unused */
 122 #define IO_SSR_SCSI_DMA_DIR     (1<<18)         /* SCSI DMA direction */
 123 #define IO_SSR_SCSI_DMA_EN      (1<<17)         /* SCSI DMA enable */
 124 #define IO_SSR_LANCE_DMA_EN     (1<<16)         /* LANCE DMA enable */
 125
 126                                                 /* except Maxine */
 127 #define IO_SSR_SCC1A_TX_DMA_EN  (1<<29)         /* SCC1A transmit DMA enable */
 128 #define IO_SSR_SCC1A_RX_DMA_EN  (1<<28)         /* SCC1A receive DMA enable */
 129 #define IO_SSR_RES_22           (1<<22)         /* unused */
 130 #define IO_SSR_RES_21           (1<<21)         /* unused */
 131 #define IO_SSR_RES_20           (1<<20)         /* unused */
 132 #define IO_SSR_RES_19           (1<<19)         /* unused */
 133
 134                                                 /* Maxine */
 135 #define IO_SSR_AB_TX_DMA_EN     (1<<29)         /* ACCESS.bus xmit DMA enable */
 136 #define IO_SSR_AB_RX_DMA_EN     (1<<28)         /* ACCESS.bus recv DMA enable */
 137 #define IO_SSR_FLOPPY_DMA_DIR   (1<<22)         /* Floppy DMA direction */
 138 #define IO_SSR_FLOPPY_DMA_EN    (1<<21)         /* Floppy DMA enable */
 139 #define IO_SSR_ISDN_TX_DMA_EN   (1<<20)         /* ISDN transmit DMA enable */
 140 #define IO_SSR_ISDN_RX_DMA_EN   (1<<19)         /* ISDN receive DMA enable */
 141
 142 /*
 143  * The lower 16 bits are system-specific.  Bits 15,11:8 are common and
 144  * defined here.  The rest is defined in system-specific headers.
 145  */
 146 #define KN0X_IO_SSR_DIAGDN      (1<<15)         /* diagnostic jumper */
 147 #define KN0X_IO_SSR_SCC_RST     (1<<11)         /* ~SCC0,1 (Z85C30) reset */
 148 #define KN0X_IO_SSR_RTC_RST     (1<<10)         /* ~RTC (DS1287) reset */
 149 #define KN0X_IO_SSR_ASC_RST     (1<<9)          /* ~ASC (NCR53C94) reset */
 150 #define KN0X_IO_SSR_LANCE_RST   (1<<8)          /* ~LANCE (Am7990) reset */
 151
 152 #endif /* __ASM_MIPS_DEC_IOASIC_ADDRS_H */