1 | /****************************************************************************** |
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2 | * kernel.c |
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3 | * |
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4 | * Assorted crap goes here, including the initial C entry point, jumped at |
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5 | * from head.S. |
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6 | * |
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7 | * Copyright (c) 2002-2003, K A Fraser & R Neugebauer |
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8 | * Copyright (c) 2005, Grzegorz Milos, Intel Research Cambridge |
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9 | * Copyright (c) 2006, Robert Kaiser, FH Wiesbaden |
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10 | * |
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11 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
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12 | * of this software and associated documentation files (the "Software"), to |
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13 | * deal in the Software without restriction, including without limitation the |
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14 | * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or |
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15 | * sell copies of the Software, and to permit persons to whom the Software is |
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16 | * furnished to do so, subject to the following conditions: |
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17 | * |
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18 | * The above copyright notice and this permission notice shall be included in |
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19 | * all copies or substantial portions of the Software. |
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20 | * |
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21 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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22 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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23 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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24 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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25 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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26 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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27 | * DEALINGS IN THE SOFTWARE. |
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28 | */ |
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29 | |
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30 | #include <os.h> |
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31 | #include <hypervisor.h> |
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32 | #include <mm.h> |
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33 | #include <events.h> |
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34 | #include <time.h> |
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35 | #include <types.h> |
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36 | #include <lib.h> |
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37 | #include <sched.h> |
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38 | #include <xenbus.h> |
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39 | #include <gnttab.h> |
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40 | #include <netfront.h> |
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41 | #include <xen/features.h> |
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42 | #include <xen/version.h> |
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43 | |
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44 | |
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45 | u8 xen_features[XENFEAT_NR_SUBMAPS * 32]; |
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46 | |
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47 | void setup_xen_features(void) |
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48 | { |
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49 | xen_feature_info_t fi; |
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50 | int i, j; |
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51 | |
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52 | for (i = 0; i < XENFEAT_NR_SUBMAPS; i++) |
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53 | { |
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54 | fi.submap_idx = i; |
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55 | if (HYPERVISOR_xen_version(XENVER_get_features, &fi) < 0) |
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56 | break; |
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57 | |
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58 | for (j=0; j<32; j++) |
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59 | xen_features[i*32+j] = !!(fi.submap & 1<<j); |
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60 | } |
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61 | } |
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62 | |
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63 | void test_xenbus(void); |
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64 | |
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65 | static void xenbus_tester(void *p) |
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66 | { |
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67 | printk("Xenbus tests disabled, because of a Xend bug.\n"); |
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68 | /* test_xenbus(); */ |
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69 | } |
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70 | |
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71 | static void periodic_thread(void *p) |
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72 | { |
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73 | struct timeval tv; |
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74 | printk("Periodic thread started.\n"); |
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75 | for(;;) |
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76 | { |
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77 | gettimeofday(&tv); |
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78 | printk("T(s=%ld us=%ld)\n", tv.tv_sec, tv.tv_usec); |
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79 | sleep(1000); |
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80 | } |
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81 | } |
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82 | |
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83 | static void netfront_thread(void *p) |
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84 | { |
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85 | init_netfront(&start_info); |
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86 | } |
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87 | |
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88 | /* This should be overridden by the application we are linked against. */ |
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89 | __attribute__((weak)) int app_main(start_info_t *si) |
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90 | { |
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91 | printk("Dummy main: start_info=%p\n", si); |
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92 | create_thread("xenbus_tester", xenbus_tester, si); |
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93 | create_thread("periodic_thread", periodic_thread, si); |
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94 | create_thread("netfront", netfront_thread, si); |
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95 | return 0; |
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96 | } |
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97 | |
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98 | /* |
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99 | * INITIAL C ENTRY POINT. |
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100 | */ |
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101 | void start_kernel(start_info_t *si) |
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102 | { |
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103 | static char hello[] = "Bootstrapping...\n"; |
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104 | |
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105 | (void)HYPERVISOR_console_io(CONSOLEIO_write, strlen(hello), hello); |
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106 | |
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107 | arch_init(si); |
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108 | |
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109 | trap_init(); |
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110 | |
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111 | /* print out some useful information */ |
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112 | printk("Xen Minimal OS!\n"); |
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113 | printk("start_info: %p\n", si); |
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114 | printk(" nr_pages: %lu", si->nr_pages); |
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115 | printk(" shared_inf: %08lx\n", si->shared_info); |
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116 | printk(" pt_base: %p", (void *)si->pt_base); |
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117 | printk(" mod_start: 0x%lx\n", si->mod_start); |
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118 | printk(" mod_len: %lu\n", si->mod_len); |
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119 | printk(" flags: 0x%x\n", (unsigned int)si->flags); |
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120 | printk(" cmd_line: %s\n", |
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121 | si->cmd_line ? (const char *)si->cmd_line : "NULL"); |
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122 | |
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123 | /* Set up events. */ |
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124 | init_events(); |
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125 | |
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126 | /* ENABLE EVENT DELIVERY. This is disabled at start of day. */ |
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127 | __sti(); |
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128 | |
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129 | arch_print_info(); |
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130 | |
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131 | setup_xen_features(); |
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132 | |
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133 | /* Init memory management. */ |
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134 | init_mm(); |
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135 | |
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136 | /* Init time and timers. */ |
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137 | init_time(); |
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138 | |
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139 | /* Init the console driver. */ |
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140 | init_console(); |
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141 | |
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142 | /* Init grant tables */ |
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143 | init_gnttab(); |
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144 | |
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145 | /* Init scheduler. */ |
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146 | init_sched(); |
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147 | |
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148 | /* Init XenBus */ |
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149 | init_xenbus(); |
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150 | |
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151 | /* Call (possibly overridden) app_main() */ |
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152 | app_main(&start_info); |
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153 | |
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154 | /* Everything initialised, start idle thread */ |
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155 | run_idle_thread(); |
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156 | } |
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157 | |
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158 | |
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159 | /* |
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160 | * do_exit: This is called whenever an IRET fails in entry.S. |
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161 | * This will generally be because an application has got itself into |
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162 | * a really bad state (probably a bad CS or SS). It must be killed. |
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163 | * Of course, minimal OS doesn't have applications :-) |
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164 | */ |
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165 | |
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166 | void do_exit(void) |
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167 | { |
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168 | printk("Do_exit called!\n"); |
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169 | for( ;; ) |
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170 | { |
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171 | struct sched_shutdown sched_shutdown = { .reason = SHUTDOWN_crash }; |
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172 | HYPERVISOR_sched_op(SCHEDOP_shutdown, &sched_shutdown); |
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173 | } |
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174 | } |
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