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1 | jermar | 1 | /* |
2 | * Copyright (C) 2001-2004 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 | #include <arch/asm.h> |
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97 | jermar | 30 | #include <context.h> |
1 | jermar | 31 | #include <print.h> |
68 | decky | 32 | #include <panic.h> |
1 | jermar | 33 | #include <config.h> |
34 | #include <time/clock.h> |
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35 | #include <proc/scheduler.h> |
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36 | #include <proc/thread.h> |
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37 | #include <proc/task.h> |
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38 | #include <mm/vm.h> |
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39 | #include <main/kinit.h> |
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40 | #include <cpu.h> |
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41 | #include <mm/heap.h> |
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42 | |||
43 | #ifdef __SMP__ |
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11 | jermar | 44 | #include <arch/smp/apic.h> |
34 | jermar | 45 | #include <arch/smp/mps.h> |
1 | jermar | 46 | #endif /* __SMP__ */ |
47 | |||
34 | jermar | 48 | #include <smp/smp.h> |
49 | |||
146 | cejka | 50 | #include <arch/mm/memory_init.h> |
1 | jermar | 51 | #include <mm/frame.h> |
52 | #include <mm/page.h> |
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5 | jermar | 53 | #include <mm/tlb.h> |
1 | jermar | 54 | #include <synch/waitq.h> |
55 | |||
210 | decky | 56 | #include <arch/arch.h> |
1 | jermar | 57 | #include <arch.h> |
76 | jermar | 58 | #include <arch/faddr.h> |
1 | jermar | 59 | |
106 | jermar | 60 | #include <typedefs.h> |
61 | |||
1 | jermar | 62 | char *project = "SPARTAN kernel"; |
78 | jermar | 63 | char *copyright = "Copyright (C) 2001-2005 Jakub Jermar\nCopyright (C) 2005 HelenOS project"; |
1 | jermar | 64 | |
65 | config_t config; |
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66 | context_t ctx; |
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67 | |||
68 | /* |
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69 | * These 'hardcoded' variables will be intialised by |
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105 | jermar | 70 | * the linker or the low level assembler code with |
71 | * appropriate sizes and addresses. |
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1 | jermar | 72 | */ |
37 | jermar | 73 | __address hardcoded_load_address = 0; |
106 | jermar | 74 | size_t hardcoded_ktext_size = 0; |
75 | size_t hardcoded_kdata_size = 0; |
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1 | jermar | 76 | |
180 | jermar | 77 | /* |
78 | * Size of memory in bytes taken by kernel and heap. |
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79 | */ |
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80 | static size_t kernel_size; |
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81 | |||
82 | /* |
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83 | * Extra space on heap to make the stack start on page boundary. |
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84 | */ |
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85 | static size_t heap_delta; |
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86 | |||
1 | jermar | 87 | void main_bsp(void); |
88 | void main_ap(void); |
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89 | |||
90 | /* |
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91 | * These two functions prevent stack from underflowing during the |
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92 | * kernel boot phase when SP is set to the very top of the reserved |
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93 | * space. The stack could get corrupted by a fooled compiler-generated |
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94 | * pop sequence otherwise. |
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95 | */ |
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96 | static void main_bsp_separated_stack(void); |
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97 | static void main_ap_separated_stack(void); |
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98 | |||
108 | decky | 99 | /** Bootstrap CPU main kernel routine |
100 | * |
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101 | * Initializes the kernel by bootstrap CPU. |
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102 | * |
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103 | * Assuming cpu_priority_high(). |
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104 | * |
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1 | jermar | 105 | */ |
106 | void main_bsp(void) |
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107 | { |
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108 | config.cpu_count = 1; |
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109 | config.cpu_active = 1; |
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210 | decky | 110 | |
180 | jermar | 111 | kernel_size = hardcoded_ktext_size + hardcoded_kdata_size + CONFIG_HEAP_SIZE; |
112 | heap_delta = PAGE_SIZE - ((hardcoded_load_address + kernel_size) % PAGE_SIZE); |
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113 | heap_delta = (heap_delta == PAGE_SIZE) ? 0 : heap_delta; |
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114 | kernel_size += heap_delta; |
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210 | decky | 115 | |
1 | jermar | 116 | config.base = hardcoded_load_address; |
146 | cejka | 117 | config.memory_size = get_memory_size(); |
180 | jermar | 118 | config.kernel_size = kernel_size + CONFIG_STACK_SIZE; |
210 | decky | 119 | |
47 | jermar | 120 | context_save(&ctx); |
210 | decky | 121 | early_mapping(config.base + hardcoded_ktext_size + hardcoded_kdata_size + heap_delta, CONFIG_STACK_SIZE + CONFIG_HEAP_SIZE); |
180 | jermar | 122 | context_set(&ctx, FADDR(main_bsp_separated_stack), config.base + kernel_size, CONFIG_STACK_SIZE); |
47 | jermar | 123 | context_restore(&ctx); |
1 | jermar | 124 | /* not reached */ |
125 | } |
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126 | |||
108 | decky | 127 | |
128 | /** Bootstrap CPU main kernel routine stack wrapper |
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129 | * |
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130 | * Second part of main_bsp(). |
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131 | * |
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132 | */ |
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174 | jermar | 133 | void main_bsp_separated_stack(void) |
134 | { |
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1 | jermar | 135 | vm_t *m; |
136 | task_t *k; |
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137 | thread_t *t; |
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207 | decky | 138 | |
184 | jermar | 139 | the_initialize(THE); |
235 | decky | 140 | |
26 | jermar | 141 | arch_pre_mm_init(); |
180 | jermar | 142 | heap_init(config.base + hardcoded_ktext_size + hardcoded_kdata_size, CONFIG_HEAP_SIZE + heap_delta); |
23 | jermar | 143 | frame_init(); |
144 | page_init(); |
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145 | tlb_init(); |
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16 | jermar | 146 | |
23 | jermar | 147 | arch_post_mm_init(); |
148 | |||
71 | jermar | 149 | printf("%s\n%s\n", project, copyright); |
77 | jermar | 150 | printf("%P: hardcoded_ktext_size=%dK, hardcoded_kdata_size=%dK\n", |
1 | jermar | 151 | config.base, hardcoded_ktext_size/1024, hardcoded_kdata_size/1024); |
152 | |||
32 | jermar | 153 | arch_late_init(); |
27 | jermar | 154 | |
34 | jermar | 155 | smp_init(); |
149 | jermar | 156 | printf("config.memory_size=%dM\n", config.memory_size/(1024*1024)); |
27 | jermar | 157 | printf("config.cpu_count=%d\n", config.cpu_count); |
1 | jermar | 158 | |
159 | cpu_init(); |
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220 | vana | 160 | |
1 | jermar | 161 | calibrate_delay_loop(); |
210 | decky | 162 | |
1 | jermar | 163 | timeout_init(); |
164 | scheduler_init(); |
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165 | task_init(); |
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166 | thread_init(); |
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167 | |||
168 | /* |
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169 | * Create kernel vm mapping. |
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170 | */ |
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167 | jermar | 171 | m = vm_create(GET_PTL0_ADDRESS()); |
210 | decky | 172 | if (!m) |
173 | panic("can't create kernel vm address space\n"); |
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1 | jermar | 174 | |
175 | /* |
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176 | * Create kernel task. |
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177 | */ |
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178 | k = task_create(m); |
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210 | decky | 179 | if (!k) |
180 | panic("can't create kernel task\n"); |
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181 | |||
1 | jermar | 182 | /* |
183 | * Create the first thread. |
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184 | */ |
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185 | t = thread_create(kinit, NULL, k, 0); |
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210 | decky | 186 | if (!t) |
187 | panic("can't create kinit thread\n"); |
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1 | jermar | 188 | thread_ready(t); |
189 | /* |
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190 | * This call to scheduler() will return to kinit, |
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191 | * starting the thread of kernel threads. |
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192 | */ |
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193 | scheduler(); |
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194 | /* not reached */ |
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195 | } |
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196 | |||
108 | decky | 197 | |
1 | jermar | 198 | #ifdef __SMP__ |
108 | decky | 199 | /** Application CPUs main kernel routine |
200 | * |
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201 | * Executed by application processors, temporary stack |
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202 | * is at ctx.sp which was set during BP boot. |
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203 | * |
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204 | * Assuming cpu_priority_high(). |
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205 | * |
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1 | jermar | 206 | */ |
207 | void main_ap(void) |
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208 | { |
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209 | /* |
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210 | * Incrementing the active CPU counter will guarantee that the |
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211 | * pm_init() will not attempt to build GDT and IDT tables again. |
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212 | * Neither frame_init() will do the complete thing. Neither cpu_init() |
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213 | * will do. |
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214 | */ |
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215 | config.cpu_active++; |
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216 | |||
192 | jermar | 217 | /* |
218 | * The THE structure is well defined because ctx.sp is used as stack. |
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219 | */ |
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220 | the_initialize(THE); |
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298 | decky | 221 | |
26 | jermar | 222 | arch_pre_mm_init(); |
1 | jermar | 223 | frame_init(); |
224 | page_init(); |
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26 | jermar | 225 | arch_post_mm_init(); |
298 | decky | 226 | |
1 | jermar | 227 | cpu_init(); |
298 | decky | 228 | |
1 | jermar | 229 | calibrate_delay_loop(); |
230 | |||
231 | l_apic_init(); |
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232 | l_apic_debug(); |
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233 | |||
192 | jermar | 234 | the_copy(THE, (the_t *) CPU->stack); |
1 | jermar | 235 | |
236 | /* |
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237 | * If we woke kmp up before we left the kernel stack, we could |
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238 | * collide with another CPU coming up. To prevent this, we |
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239 | * switch to this cpu's private stack prior to waking kmp up. |
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240 | */ |
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97 | jermar | 241 | context_set(&CPU->saved_context, FADDR(main_ap_separated_stack), CPU->stack, CPU_STACK_SIZE); |
47 | jermar | 242 | context_restore(&CPU->saved_context); |
1 | jermar | 243 | /* not reached */ |
244 | } |
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245 | |||
108 | decky | 246 | |
247 | /** Application CPUs main kernel routine stack wrapper |
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248 | * |
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249 | * Second part of main_ap(). |
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250 | * |
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251 | */ |
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1 | jermar | 252 | void main_ap_separated_stack(void) |
253 | { |
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254 | /* |
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255 | * Configure timeouts for this cpu. |
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256 | */ |
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257 | timeout_init(); |
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258 | |||
259 | waitq_wakeup(&ap_completion_wq, WAKEUP_FIRST); |
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260 | scheduler(); |
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261 | /* not reached */ |
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262 | } |
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263 | #endif /* __SMP__*/ |