include/asm-sparc/sbi.h

   1 /*
   2  * sbi.h:  SBI (Sbus Interface on sun4d) definitions
   3  *
   4  * Copyright (C) 1997 Jakub Jelinek <jj@sunsite.mff.cuni.cz>
   5  */
   6
   7 #ifndef _SPARC_SBI_H
   8 #define _SPARC_SBI_H
   9
  10 #include <asm/obio.h>
  11
  12 /* SBI */
  13 struct sbi_regs {
  14 /* 0x0000 */    u32             cid;            /* Component ID */
  15 /* 0x0004 */    u32             ctl;            /* Control */
  16 /* 0x0008 */    u32             status;         /* Status */
  17                 u32             _unused1;
  18
  19 /* 0x0010 */    u32             cfg0;           /* Slot0 config reg */
  20 /* 0x0014 */    u32             cfg1;           /* Slot1 config reg */
  21 /* 0x0018 */    u32             cfg2;           /* Slot2 config reg */
  22 /* 0x001c */    u32             cfg3;           /* Slot3 config reg */
  23
  24 /* 0x0020 */    u32             stb0;           /* Streaming buf control for slot 0 */
  25 /* 0x0024 */    u32             stb1;           /* Streaming buf control for slot 1 */
  26 /* 0x0028 */    u32             stb2;           /* Streaming buf control for slot 2 */
  27 /* 0x002c */    u32             stb3;           /* Streaming buf control for slot 3 */
  28
  29 /* 0x0030 */    u32             intr_state;     /* Interrupt state */
  30 /* 0x0034 */    u32             intr_tid;       /* Interrupt target ID */
  31 /* 0x0038 */    u32             intr_diag;      /* Interrupt diagnostics */
  32 };
  33
  34 #define SBI_CID                 0x02800000
  35 #define SBI_CTL                 0x02800004
  36 #define SBI_STATUS              0x02800008
  37 #define SBI_CFG0                0x02800010
  38 #define SBI_CFG1                0x02800014
  39 #define SBI_CFG2                0x02800018
  40 #define SBI_CFG3                0x0280001c
  41 #define SBI_STB0                0x02800020
  42 #define SBI_STB1                0x02800024
  43 #define SBI_STB2                0x02800028
  44 #define SBI_STB3                0x0280002c
  45 #define SBI_INTR_STATE          0x02800030
  46 #define SBI_INTR_TID            0x02800034
  47 #define SBI_INTR_DIAG           0x02800038
  48
  49 /* Burst bits for 8, 16, 32, 64 are in cfgX registers at bits 2, 3, 4, 5 respectively */
  50 #define SBI_CFG_BURST_MASK      0x0000001e
  51
  52 /* How to make devid from sbi no */
  53 #define SBI2DEVID(sbino) ((sbino<<4)|2)
  54
  55 /* intr_state has 4 bits for slots 0 .. 3 and these bits are repeated for each sbus irq level
  56  *
  57  *                 +-------+-------+-------+-------+-------+-------+-------+-------+
  58  *  SBUS IRQ LEVEL |   7   |   6   |   5   |   4   |   3   |   2   |   1   |       |
  59  *                 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Reser |
  60  *  SLOT #         |3|2|1|0|3|2|1|0|3|2|1|0|3|2|1|0|3|2|1|0|3|2|1|0|3|2|1|0|  ved  |
  61  *                 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-------+
  62  *  Bits           31      27      23      19      15      11      7       3      0
  63  */
  64
  65
  66 #ifndef __ASSEMBLY__
  67
  68 static inline int acquire_sbi(int devid, int mask)
  69 {
  70         __asm__ __volatile__ ("swapa [%2] %3, %0" :
  71                               "=r" (mask) :
  72                               "0" (mask),
  73                               "r" (ECSR_DEV_BASE(devid) | SBI_INTR_STATE),
  74                               "i" (ASI_M_CTL));
  75         return mask;
  76 }
  77
  78 static inline void release_sbi(int devid, int mask)
  79 {
  80         __asm__ __volatile__ ("sta %0, [%1] %2" : :
  81                               "r" (mask),
  82                               "r" (ECSR_DEV_BASE(devid) | SBI_INTR_STATE),
  83                               "i" (ASI_M_CTL));
  84 }
  85
  86 static inline void set_sbi_tid(int devid, int targetid)
  87 {
  88         __asm__ __volatile__ ("sta %0, [%1] %2" : :
  89                               "r" (targetid),
  90                               "r" (ECSR_DEV_BASE(devid) | SBI_INTR_TID),
  91                               "i" (ASI_M_CTL));
  92 }
  93
  94 static inline int get_sbi_ctl(int devid, int cfgno)
  95 {
  96         int cfg;
  97
  98         __asm__ __volatile__ ("lda [%1] %2, %0" :
  99                               "=r" (cfg) :
 100                               "r" ((ECSR_DEV_BASE(devid) | SBI_CFG0) + (cfgno<<2)),
 101                               "i" (ASI_M_CTL));
 102         return cfg;
 103 }
 104
 105 static inline void set_sbi_ctl(int devid, int cfgno, int cfg)
 106 {
 107         __asm__ __volatile__ ("sta %0, [%1] %2" : :
 108                               "r" (cfg),
 109                               "r" ((ECSR_DEV_BASE(devid) | SBI_CFG0) + (cfgno<<2)),
 110                               "i" (ASI_M_CTL));
 111 }
 112
 113 #endif /* !__ASSEMBLY__ */
 114
 115 #endif /* !(_SPARC_SBI_H) */