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annotate arch/channel.h @ 16:3d69c66b2610

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arch: last fixup, now things seem to work as expected
author Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
date Fri, 08 Apr 2011 09:44:57 -0400
parents c75be274ce23
children
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1 #ifndef __CHANNEL_H
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2 #define __CHANNEL_H
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3
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4 struct pmcw {
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5 /* word 0 */
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6 u32 interrupt_param; /* Interruption Parameter */
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7
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8 /* word 1*/
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9 u8 __zero1:2,
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10 isc:3, /* I/O-Interruption-Subclass Code */
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11 __zero2:3;
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12 u8 e:1, /* Enabled */
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13 lm:2, /* Limit Mode */
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14 mm:2, /* Measurement-Mode Enable */
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15 d:1, /* Multipath Mode */
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16 t:1, /* Timing Facility */
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17 v:1; /* Device Number Valid */
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18 u16 dev_num; /* Device Number */
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19
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20 /* word 2 */
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21 u8 lpm; /* Logical-Path Mask */
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22 u8 pnom; /* Path-Not-Operational Mask */
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23 u8 lpum; /* Last-Path-Used Mask */
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24 u8 pim; /* Path-Installed Mask */
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25
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26 /* word 3 */
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27 u16 mbi; /* Measurement-Block Index */
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28 u8 pom; /* Path-Operational Mask */
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29 u8 pam; /* Path-Available Mask */
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30
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31 /* word 4 & 5 */
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32 u8 chpid[8]; /* Channel-Path Identifiers */
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33
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34 /* word 6 */
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35 u16 __zero3;
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36 u16 __zero4:13,
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37 f:1, /* Measurement Block Format Control */
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38 x:1, /* Extended Measurement Word Mode Enable */
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39 s:1; /* Concurrent Sense */
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40 };
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41
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42 struct scsw {
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43 /* word 0 */
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44 u16 key:4, /* Subchannel key */
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45 s:1, /* Suspend control */
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46 l:1, /* ESW format */
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47 cc:2, /* Deferred condition code */
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48 f:1, /* Format */
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49 p:1, /* Prefetch */
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50 i:1, /* Initial-status interruption control */
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51 a:1, /* Address-limit-checking control */
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52 u:1, /* Supress-suspended interruption */
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53 z:1, /* Zero condition code */
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54 e:1, /* Extended control */
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55 n:1; /* Path no operational */
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56 u16 __zero:1,
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57 fc:3, /* Function control */
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58 ac:7, /* Activity control */
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59 sc:5; /* Status control */
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60
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61 /* word 1 */
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62 u32 addr; /* CCW Address */
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63
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64 /* word 2 */
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65 u8 dev_status; /* Device status */
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66 u8 sch_status; /* Subchannel status */
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67 u16 count; /* Count */
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68 } __attribute__((packed));
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69
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70 struct schib {
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71 struct pmcw pmcw; /* Path Management Control Word */
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72 struct scsw scsw; /* Subchannel Status Word */
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73 u32 measure_block_1;
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74 u32 measure_block_2;
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75 u32 model_dep_area;
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76 } __attribute__((packed,aligned(4)));
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77
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78 struct orb {
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79 /* word 0 */
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80 u32 param; /* Interruption Parameter */
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81
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82 /* word 1 */
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83 u8 key:4, /* Subchannel Key */
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84 s:1, /* Suspend */
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85 c:1, /* Streaming-Mode Control */
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86 m:1, /* Modification Control */
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87 y:1; /* Synchronization Control */
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88 u8 f:1, /* Format Control */
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89 p:1, /* Prefetch Control */
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90 i:1, /* Initial-Status-Interruption Control */
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91 a:1, /* Address-Limit-Checking control */
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92 u:1, /* Suppress-Suspend-Interruption Control */
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93 __zero1:1,
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94 h:1, /* Format-2-IDAW Control */
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95 t:1; /* 2K-IDAW Control */
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96 u8 lpm; /* Logical-Path Mask */
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97 u8 l:1, /* Incorrect-Length-Suppression Mode */
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98 d:1, /* Modified-CCW-Indirect-Data-Addressing Control */
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99 __zero2:5,
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100 x:1; /* ORB-Extension Control */
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101
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102 /* word 2 */
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103 u32 addr; /* Channel-Program Address */
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104
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105 /* word 3 */
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106 u8 css_prio; /* Channel-Subsystem Priority */
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107 u8 __reserved1;
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108 u8 cu_prio; /* Control-Unit Priority */
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109 u8 __reserved2;
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110
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111 /* word 4 - 7 */
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112 u32 __reserved3;
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113 u32 __reserved4;
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114 u32 __reserved5;
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115 u32 __reserved6;
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116 } __attribute__((packed,aligned(4)));
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117
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118 struct ccw {
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119 u8 cmd; /* Command code */
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120 u8 flags; /* Flags */
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121 u16 count; /* Count */
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122 u32 addr; /* Data Address */
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123 } __attribute__((packed,aligned(8)));
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124
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125 struct psw {
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126 u8 _zero0:1,
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127 r:1, /* PER Mask (R) */
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128 _zero1:3,
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129 t:1, /* DAT Mode (T) */
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130 io:1, /* I/O Mask (IO) */
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131 ex:1; /* External Mask (EX) */
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132
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133 u8 key:4, /* Key */
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134 _zero2:1,
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135 m:1, /* Machine-Check Mask (M) */
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136 w:1, /* Wait State (W) */
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137 p:1; /* Problem State (P) */
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138
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139 u8 as:2, /* Address-Space Control (AS) */
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140 cc:2, /* Condition Code (CC) */
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141 prog_mask:4; /* Program Mask */
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142
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143 u8 _zero3:7,
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144 ea:1; /* Extended Addressing (EA) */
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145
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146 u32 ba:1, /* Basic Addressing (BA) */
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147 _zero4:31;
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148
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149 u64 ptr;
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150 };
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151
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152 struct irb {
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153 struct scsw scsw; /* Subchannel-Status */
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154 u32 w0a, w1a, w2a, w3a, w4a;
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155 u32 w0b, w1b, w2b, w3b, w4b, w5b, w6b, w7b;
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156 u32 w0c, w1c, w2c, w3c, w4c, w5c, w6c, w7c;
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157 } __attribute__((packed,aligned(4)));
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158
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159 static inline int store_sch(u32 sch, struct schib *schib)
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160 {
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161 int cc;
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162
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163 asm volatile(
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164 "lr %%r1,%2\n"
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165 "stsch %1\n"
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166 "ipm %0\n"
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167 "srl %0,28\n"
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168 : /* output */
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169 "=d" (cc),
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170 "=Q" (*schib)
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171 : /* input */
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172 "d" (sch)
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173 : /* clobbered */
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174 "cc", "r1", "memory"
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175 );
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176
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177 return cc;
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178 }
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179
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180 static inline int modify_sch(u32 sch, struct schib *schib)
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181 {
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182 int cc;
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183
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184 asm volatile(
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185 "lr %%r1,%1\n"
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186 "msch 0(%2)\n"
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187 "ipm %0\n"
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188 "srl %0,28\n"
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189 : /* output */
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190 "=d" (cc)
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191 : /* input */
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192 "d" (sch),
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193 "a" (schib)
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194 : /* clobbered */
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195 "cc", "r1"
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196 );
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197
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198 return cc;
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199 }
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200
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201 static inline int start_sch(u32 sch, struct orb *orb)
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202 {
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203 int cc;
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204
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205 asm volatile(
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206 " lr %%r1,%1\n"
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207 " ssch 0(%2)\n"
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208 " ipm %0\n"
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209 " srl %0,28\n"
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210 : /* output */
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211 "=d" (cc)
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212 : /* input */
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213 "d" (sch),
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214 "a" (orb)
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215 : /* clobbered */
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216 "cc", "r1"
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217 );
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218
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219 return cc;
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220 }
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221
16
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222 extern void wait_for_io_int();
12
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223
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224 #endif