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4377 | svoboda | 1 | /* |
2 | * Copyright (c) 2009 Jakub Jermar |
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3 | * All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * |
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9 | * - Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * - Redistributions in binary form must reproduce the above copyright |
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12 | * notice, this list of conditions and the following disclaimer in the |
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13 | * documentation and/or other materials provided with the distribution. |
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14 | * - The name of the author may not be used to endorse or promote products |
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15 | * derived from this software without specific prior written permission. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |||
29 | /** @addtogroup obio |
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30 | * @{ |
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31 | */ |
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32 | |||
33 | /** |
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34 | * @file obio.c |
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35 | * @brief OBIO driver. |
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36 | * |
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37 | * OBIO is a short for on-board I/O. On UltraSPARC IIi and systems with U2P, |
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38 | * there is a piece of the root PCI bus controller address space, which |
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39 | * contains interrupt mapping and clear registers for all on-board devices. |
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40 | * Although UltraSPARC IIi and U2P are different in general, these registers can |
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41 | * be found at the same addresses. |
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42 | */ |
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43 | |||
44 | #include <ipc/ipc.h> |
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45 | #include <ipc/services.h> |
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46 | #include <ipc/bus.h> |
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47 | #include <ipc/ns.h> |
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48 | #include <sysinfo.h> |
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49 | #include <as.h> |
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50 | #include <ddi.h> |
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51 | #include <align.h> |
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52 | #include <bool.h> |
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53 | #include <errno.h> |
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54 | #include <async.h> |
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55 | #include <align.h> |
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56 | #include <async.h> |
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57 | #include <stdio.h> |
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58 | #include <ipc/devmap.h> |
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59 | |||
60 | #define NAME "obio" |
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61 | |||
62 | #define OBIO_SIZE 0x1898 |
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63 | |||
64 | #define OBIO_IMR_BASE 0x200 |
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65 | #define OBIO_IMR(ino) (OBIO_IMR_BASE + ((ino) & INO_MASK)) |
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66 | |||
67 | #define OBIO_CIR_BASE 0x300 |
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68 | #define OBIO_CIR(ino) (OBIO_CIR_BASE + ((ino) & INO_MASK)) |
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69 | |||
70 | #define INO_MASK 0x1f |
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71 | |||
72 | static void *base_phys; |
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73 | static volatile uint64_t *base_virt; |
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74 | |||
75 | /** Handle one connection to obio. |
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76 | * |
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77 | * @param iid Hash of the request that opened the connection. |
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78 | * @param icall Call data of the request that opened the connection. |
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79 | */ |
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80 | static void obio_connection(ipc_callid_t iid, ipc_call_t *icall) |
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81 | { |
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82 | ipc_callid_t callid; |
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83 | ipc_call_t call; |
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84 | |||
85 | /* |
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86 | * Answer the first IPC_M_CONNECT_ME_TO call. |
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87 | */ |
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88 | ipc_answer_0(iid, EOK); |
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89 | |||
90 | while (1) { |
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91 | int inr; |
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92 | |||
93 | callid = async_get_call(&call); |
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94 | switch (IPC_GET_METHOD(call)) { |
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95 | case BUS_CLEAR_INTERRUPT: |
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96 | inr = IPC_GET_ARG1(call); |
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97 | base_virt[OBIO_CIR(inr & INO_MASK)] = 0; |
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98 | ipc_answer_0(callid, EOK); |
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99 | break; |
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100 | default: |
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101 | ipc_answer_0(callid, EINVAL); |
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102 | break; |
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103 | } |
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104 | } |
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105 | } |
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106 | |||
107 | /** Initialize the OBIO driver. |
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108 | * |
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109 | * So far, the driver heavily depends on information provided by the kernel via |
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110 | * sysinfo. In the future, there should be a standalone OBIO driver. |
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111 | */ |
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112 | static bool obio_init(void) |
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113 | { |
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114 | ipcarg_t phonead; |
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115 | |||
116 | base_phys = (void *) sysinfo_value("obio.base.physical"); |
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117 | |||
118 | if (!base_phys) { |
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119 | printf(NAME ": no OBIO registers found\n"); |
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120 | return false; |
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121 | } |
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122 | |||
123 | base_virt = as_get_mappable_page(OBIO_SIZE); |
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124 | |||
125 | int flags = AS_AREA_READ | AS_AREA_WRITE; |
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126 | int retval = physmem_map(base_phys, (void *) base_virt, |
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127 | ALIGN_UP(OBIO_SIZE, PAGE_SIZE) >> PAGE_WIDTH, flags); |
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128 | |||
129 | if (retval < 0) { |
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130 | printf(NAME ": Error mapping OBIO registers\n"); |
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131 | return false; |
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132 | } |
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133 | |||
134 | printf(NAME ": OBIO registers with base at %p\n", base_phys); |
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135 | |||
136 | async_set_client_connection(obio_connection); |
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137 | ipc_connect_to_me(PHONE_NS, SERVICE_OBIO, 0, 0, &phonead); |
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138 | |||
139 | return true; |
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140 | } |
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141 | |||
142 | int main(int argc, char **argv) |
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143 | { |
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144 | printf(NAME ": HelenOS OBIO driver\n"); |
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145 | |||
146 | if (!obio_init()) |
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147 | return -1; |
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148 | |||
149 | printf(NAME ": Accepting connections\n"); |
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150 | async_manager(); |
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151 | |||
152 | /* Never reached */ |
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153 | return 0; |
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154 | } |
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155 | |||
156 | /** |
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157 | * @} |
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158 | */ |