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1 | /* |
1 | /* |
2 | * Copyright (C) 2001-2004 Jakub Jermar |
2 | * Copyright (C) 2001-2004 Jakub Jermar |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | #include <arch/asm.h> |
29 | #include <arch/asm.h> |
30 | #include <context.h> |
30 | #include <context.h> |
31 | #include <print.h> |
31 | #include <print.h> |
32 | #include <panic.h> |
32 | #include <panic.h> |
33 | #include <debug.h> |
33 | #include <debug.h> |
34 | #include <config.h> |
34 | #include <config.h> |
35 | #include <time/clock.h> |
35 | #include <time/clock.h> |
36 | #include <proc/scheduler.h> |
36 | #include <proc/scheduler.h> |
37 | #include <proc/thread.h> |
37 | #include <proc/thread.h> |
38 | #include <proc/task.h> |
38 | #include <proc/task.h> |
39 | #include <main/kinit.h> |
39 | #include <main/kinit.h> |
40 | #include <main/version.h> |
40 | #include <main/version.h> |
41 | #include <console/kconsole.h> |
41 | #include <console/kconsole.h> |
42 | #include <cpu.h> |
42 | #include <cpu.h> |
43 | #include <align.h> |
43 | #include <align.h> |
44 | #include <interrupt.h> |
44 | #include <interrupt.h> |
45 | #include <arch/mm/memory_init.h> |
45 | #include <arch/mm/memory_init.h> |
46 | #include <mm/frame.h> |
46 | #include <mm/frame.h> |
47 | #include <mm/page.h> |
47 | #include <mm/page.h> |
48 | #include <genarch/mm/page_pt.h> |
48 | #include <genarch/mm/page_pt.h> |
49 | #include <mm/tlb.h> |
49 | #include <mm/tlb.h> |
50 | #include <mm/as.h> |
50 | #include <mm/as.h> |
51 | #include <mm/slab.h> |
51 | #include <mm/slab.h> |
52 | #include <synch/waitq.h> |
52 | #include <synch/waitq.h> |
53 | #include <arch/arch.h> |
53 | #include <arch/arch.h> |
54 | #include <arch.h> |
54 | #include <arch.h> |
55 | #include <arch/faddr.h> |
55 | #include <arch/faddr.h> |
56 | #include <typedefs.h> |
56 | #include <typedefs.h> |
57 | 57 | ||
58 | #ifdef CONFIG_SMP |
58 | #ifdef CONFIG_SMP |
59 | #include <arch/smp/apic.h> |
59 | #include <arch/smp/apic.h> |
60 | #include <arch/smp/mps.h> |
60 | #include <arch/smp/mps.h> |
61 | #endif /* CONFIG_SMP */ |
61 | #endif /* CONFIG_SMP */ |
62 | #include <smp/smp.h> |
62 | #include <smp/smp.h> |
63 | 63 | ||
64 | config_t config; /**< Global configuration structure. */ |
64 | config_t config; /**< Global configuration structure. */ |
65 | 65 | ||
66 | context_t ctx; |
66 | context_t ctx; |
67 | 67 | ||
68 | /** |
68 | /** |
69 | * These 'hardcoded' variables will be intialized by |
69 | * These 'hardcoded' variables will be intialized by |
70 | * the linker or the low level assembler code with |
70 | * the linker or the low level assembler code with |
71 | * appropriate sizes and addresses. |
71 | * appropriate sizes and addresses. |
72 | */ |
72 | */ |
73 | __address hardcoded_load_address = 0; |
73 | __address hardcoded_load_address = 0; |
74 | size_t hardcoded_ktext_size = 0; |
74 | size_t hardcoded_ktext_size = 0; |
75 | size_t hardcoded_kdata_size = 0; |
75 | size_t hardcoded_kdata_size = 0; |
76 | 76 | ||
77 | __address init_addr = 0; |
77 | __address init_addr = 0; |
78 | size_t init_size = 0; |
78 | size_t init_size = 0; |
79 | 79 | ||
80 | void main_bsp(void); |
80 | void main_bsp(void); |
81 | void main_ap(void); |
81 | void main_ap(void); |
82 | 82 | ||
83 | /* |
83 | /* |
84 | * These two functions prevent stack from underflowing during the |
84 | * These two functions prevent stack from underflowing during the |
85 | * kernel boot phase when SP is set to the very top of the reserved |
85 | * kernel boot phase when SP is set to the very top of the reserved |
86 | * space. The stack could get corrupted by a fooled compiler-generated |
86 | * space. The stack could get corrupted by a fooled compiler-generated |
87 | * pop sequence otherwise. |
87 | * pop sequence otherwise. |
88 | */ |
88 | */ |
89 | static void main_bsp_separated_stack(void); |
89 | static void main_bsp_separated_stack(void); |
90 | #ifdef CONFIG_SMP |
90 | #ifdef CONFIG_SMP |
91 | static void main_ap_separated_stack(void); |
91 | static void main_ap_separated_stack(void); |
92 | #endif |
92 | #endif |
93 | 93 | ||
94 | /** Bootstrap CPU main kernel routine |
94 | /** Bootstrap CPU main kernel routine |
95 | * |
95 | * |
96 | * Initializes the kernel by bootstrap CPU. |
96 | * Initializes the kernel by bootstrap CPU. |
97 | * This function passes control directly to |
97 | * This function passes control directly to |
98 | * main_bsp_separated_stack(). |
98 | * main_bsp_separated_stack(). |
99 | * |
99 | * |
100 | * Assuming interrupts_disable(). |
100 | * Assuming interrupts_disable(). |
101 | * |
101 | * |
102 | */ |
102 | */ |
103 | void main_bsp(void) |
103 | void main_bsp(void) |
104 | { |
104 | { |
105 | __address stackaddr; |
105 | __address stackaddr; |
106 | 106 | ||
107 | config.cpu_count = 1; |
107 | config.cpu_count = 1; |
108 | config.cpu_active = 1; |
108 | config.cpu_active = 1; |
109 | 109 | ||
110 | config.base = hardcoded_load_address; |
110 | config.base = hardcoded_load_address; |
111 | config.memory_size = get_memory_size(); |
111 | config.memory_size = get_memory_size(); |
112 | config.init_addr = init_addr; |
112 | config.init_addr = init_addr; |
113 | config.init_size = init_size; |
113 | config.init_size = init_size; |
114 | 114 | ||
115 | config.kernel_size = ALIGN_UP(hardcoded_ktext_size + hardcoded_kdata_size, PAGE_SIZE); |
115 | config.kernel_size = ALIGN_UP(hardcoded_ktext_size + hardcoded_kdata_size, PAGE_SIZE); |
116 | stackaddr = config.base + config.kernel_size; |
116 | stackaddr = config.base + config.kernel_size; |
117 | /* Avoid placing kernel on top of init */ |
117 | /* Avoid placing kernel on top of init */ |
118 | if (overlaps(stackaddr,stackaddr+CONFIG_STACK_SIZE, |
118 | if (overlaps(stackaddr,CONFIG_STACK_SIZE, |
119 | config.init_addr, config.init_addr+config.init_size)) { |
119 | config.init_addr, config.init_size)) { |
120 | 120 | ||
121 | stackaddr = ALIGN_UP(config.init_addr+config.init_size, |
121 | stackaddr = ALIGN_UP(config.init_addr+config.init_size, |
122 | CONFIG_STACK_SIZE); |
122 | CONFIG_STACK_SIZE); |
123 | config.init_size = ALIGN_UP(config.init_size,CONFIG_STACK_SIZE) + CONFIG_STACK_SIZE; |
123 | config.init_size = ALIGN_UP(config.init_size,CONFIG_STACK_SIZE) + CONFIG_STACK_SIZE; |
124 | } else { |
124 | } else { |
125 | config.kernel_size += CONFIG_STACK_SIZE; |
125 | config.kernel_size += CONFIG_STACK_SIZE; |
126 | } |
126 | } |
127 | 127 | ||
128 | context_save(&ctx); |
128 | context_save(&ctx); |
129 | context_set(&ctx, FADDR(main_bsp_separated_stack), |
129 | context_set(&ctx, FADDR(main_bsp_separated_stack), |
130 | stackaddr, CONFIG_STACK_SIZE); |
130 | stackaddr, CONFIG_STACK_SIZE); |
131 | context_restore(&ctx); |
131 | context_restore(&ctx); |
132 | /* not reached */ |
132 | /* not reached */ |
133 | } |
133 | } |
134 | 134 | ||
135 | 135 | ||
136 | /** Bootstrap CPU main kernel routine stack wrapper |
136 | /** Bootstrap CPU main kernel routine stack wrapper |
137 | * |
137 | * |
138 | * Second part of main_bsp(). |
138 | * Second part of main_bsp(). |
139 | * |
139 | * |
140 | */ |
140 | */ |
141 | void main_bsp_separated_stack(void) |
141 | void main_bsp_separated_stack(void) |
142 | { |
142 | { |
143 | task_t *k; |
143 | task_t *k; |
144 | thread_t *t; |
144 | thread_t *t; |
145 | 145 | ||
146 | the_initialize(THE); |
146 | the_initialize(THE); |
147 | /* |
147 | /* |
148 | * kconsole data structures must be initialized very early |
148 | * kconsole data structures must be initialized very early |
149 | * because other subsystems will register their respective |
149 | * because other subsystems will register their respective |
150 | * commands. |
150 | * commands. |
151 | */ |
151 | */ |
152 | kconsole_init(); |
152 | kconsole_init(); |
153 | 153 | ||
154 | /* |
154 | /* |
155 | * Exception handler initialization, before architecture |
155 | * Exception handler initialization, before architecture |
156 | * starts adding its own handlers |
156 | * starts adding its own handlers |
157 | */ |
157 | */ |
158 | exc_init(); |
158 | exc_init(); |
159 | 159 | ||
160 | /* |
160 | /* |
161 | * Memory management subsystems initialization. |
161 | * Memory management subsystems initialization. |
162 | */ |
162 | */ |
163 | arch_pre_mm_init(); |
163 | arch_pre_mm_init(); |
164 | /* Initialize at least 1 memory segment big enough for slab to work */ |
164 | /* Initialize at least 1 memory segment big enough for slab to work */ |
165 | frame_init(); |
165 | frame_init(); |
166 | slab_cache_init(); |
166 | slab_cache_init(); |
167 | as_init(); |
167 | as_init(); |
168 | page_init(); |
168 | page_init(); |
169 | tlb_init(); |
169 | tlb_init(); |
170 | arch_post_mm_init(); |
170 | arch_post_mm_init(); |
171 | version_print(); |
171 | version_print(); |
172 | 172 | ||
173 | printf("%P: hardcoded_ktext_size=%dK, hardcoded_kdata_size=%dK\n", |
173 | printf("%P: hardcoded_ktext_size=%dK, hardcoded_kdata_size=%dK\n", |
174 | config.base, hardcoded_ktext_size/1024, hardcoded_kdata_size/1024); |
174 | config.base, hardcoded_ktext_size/1024, hardcoded_kdata_size/1024); |
175 | 175 | ||
176 | arch_pre_smp_init(); |
176 | arch_pre_smp_init(); |
177 | smp_init(); |
177 | smp_init(); |
178 | /* Slab must be initialized AFTER we know the number of processors */ |
178 | /* Slab must be initialized AFTER we know the number of processors */ |
179 | slab_enable_cpucache(); |
179 | slab_enable_cpucache(); |
180 | 180 | ||
181 | printf("config.memory_size=%dM\n", config.memory_size/(1024*1024)); |
181 | printf("config.memory_size=%dM\n", config.memory_size/(1024*1024)); |
182 | printf("config.cpu_count=%d\n", config.cpu_count); |
182 | printf("config.cpu_count=%d\n", config.cpu_count); |
183 | cpu_init(); |
183 | cpu_init(); |
184 | 184 | ||
185 | calibrate_delay_loop(); |
185 | calibrate_delay_loop(); |
186 | timeout_init(); |
186 | timeout_init(); |
187 | scheduler_init(); |
187 | scheduler_init(); |
188 | task_init(); |
188 | task_init(); |
189 | thread_init(); |
189 | thread_init(); |
190 | 190 | ||
191 | if (config.init_size > 0) |
191 | if (config.init_size > 0) |
192 | printf("config.init_addr=%P, config.init_size=%d\n", config.init_addr, config.init_size); |
192 | printf("config.init_addr=%P, config.init_size=%d\n", config.init_addr, config.init_size); |
193 | 193 | ||
194 | /* |
194 | /* |
195 | * Create kernel task. |
195 | * Create kernel task. |
196 | */ |
196 | */ |
197 | k = task_create(AS_KERNEL); |
197 | k = task_create(AS_KERNEL); |
198 | if (!k) |
198 | if (!k) |
199 | panic("can't create kernel task\n"); |
199 | panic("can't create kernel task\n"); |
200 | 200 | ||
201 | /* |
201 | /* |
202 | * Create the first thread. |
202 | * Create the first thread. |
203 | */ |
203 | */ |
204 | t = thread_create(kinit, NULL, k, 0); |
204 | t = thread_create(kinit, NULL, k, 0); |
205 | if (!t) |
205 | if (!t) |
206 | panic("can't create kinit thread\n"); |
206 | panic("can't create kinit thread\n"); |
207 | thread_ready(t); |
207 | thread_ready(t); |
208 | 208 | ||
209 | /* |
209 | /* |
210 | * This call to scheduler() will return to kinit, |
210 | * This call to scheduler() will return to kinit, |
211 | * starting the thread of kernel threads. |
211 | * starting the thread of kernel threads. |
212 | */ |
212 | */ |
213 | scheduler(); |
213 | scheduler(); |
214 | /* not reached */ |
214 | /* not reached */ |
215 | } |
215 | } |
216 | 216 | ||
217 | 217 | ||
218 | #ifdef CONFIG_SMP |
218 | #ifdef CONFIG_SMP |
219 | /** Application CPUs main kernel routine |
219 | /** Application CPUs main kernel routine |
220 | * |
220 | * |
221 | * Executed by application processors, temporary stack |
221 | * Executed by application processors, temporary stack |
222 | * is at ctx.sp which was set during BP boot. |
222 | * is at ctx.sp which was set during BP boot. |
223 | * This function passes control directly to |
223 | * This function passes control directly to |
224 | * main_ap_separated_stack(). |
224 | * main_ap_separated_stack(). |
225 | * |
225 | * |
226 | * Assuming interrupts_disable()'d. |
226 | * Assuming interrupts_disable()'d. |
227 | * |
227 | * |
228 | */ |
228 | */ |
229 | void main_ap(void) |
229 | void main_ap(void) |
230 | { |
230 | { |
231 | /* |
231 | /* |
232 | * Incrementing the active CPU counter will guarantee that the |
232 | * Incrementing the active CPU counter will guarantee that the |
233 | * pm_init() will not attempt to build GDT and IDT tables again. |
233 | * pm_init() will not attempt to build GDT and IDT tables again. |
234 | * Neither frame_init() will do the complete thing. Neither cpu_init() |
234 | * Neither frame_init() will do the complete thing. Neither cpu_init() |
235 | * will do. |
235 | * will do. |
236 | */ |
236 | */ |
237 | config.cpu_active++; |
237 | config.cpu_active++; |
238 | 238 | ||
239 | /* |
239 | /* |
240 | * The THE structure is well defined because ctx.sp is used as stack. |
240 | * The THE structure is well defined because ctx.sp is used as stack. |
241 | */ |
241 | */ |
242 | the_initialize(THE); |
242 | the_initialize(THE); |
243 | 243 | ||
244 | arch_pre_mm_init(); |
244 | arch_pre_mm_init(); |
245 | frame_init(); |
245 | frame_init(); |
246 | page_init(); |
246 | page_init(); |
247 | tlb_init(); |
247 | tlb_init(); |
248 | arch_post_mm_init(); |
248 | arch_post_mm_init(); |
249 | 249 | ||
250 | cpu_init(); |
250 | cpu_init(); |
251 | 251 | ||
252 | calibrate_delay_loop(); |
252 | calibrate_delay_loop(); |
253 | 253 | ||
254 | l_apic_init(); |
254 | l_apic_init(); |
255 | l_apic_debug(); |
255 | l_apic_debug(); |
256 | 256 | ||
257 | the_copy(THE, (the_t *) CPU->stack); |
257 | the_copy(THE, (the_t *) CPU->stack); |
258 | 258 | ||
259 | /* |
259 | /* |
260 | * If we woke kmp up before we left the kernel stack, we could |
260 | * If we woke kmp up before we left the kernel stack, we could |
261 | * collide with another CPU coming up. To prevent this, we |
261 | * collide with another CPU coming up. To prevent this, we |
262 | * switch to this cpu's private stack prior to waking kmp up. |
262 | * switch to this cpu's private stack prior to waking kmp up. |
263 | */ |
263 | */ |
264 | context_set(&CPU->saved_context, FADDR(main_ap_separated_stack), (__address) CPU->stack, CPU_STACK_SIZE); |
264 | context_set(&CPU->saved_context, FADDR(main_ap_separated_stack), (__address) CPU->stack, CPU_STACK_SIZE); |
265 | context_restore(&CPU->saved_context); |
265 | context_restore(&CPU->saved_context); |
266 | /* not reached */ |
266 | /* not reached */ |
267 | } |
267 | } |
268 | 268 | ||
269 | 269 | ||
270 | /** Application CPUs main kernel routine stack wrapper |
270 | /** Application CPUs main kernel routine stack wrapper |
271 | * |
271 | * |
272 | * Second part of main_ap(). |
272 | * Second part of main_ap(). |
273 | * |
273 | * |
274 | */ |
274 | */ |
275 | void main_ap_separated_stack(void) |
275 | void main_ap_separated_stack(void) |
276 | { |
276 | { |
277 | /* |
277 | /* |
278 | * Configure timeouts for this cpu. |
278 | * Configure timeouts for this cpu. |
279 | */ |
279 | */ |
280 | timeout_init(); |
280 | timeout_init(); |
281 | 281 | ||
282 | waitq_wakeup(&ap_completion_wq, WAKEUP_FIRST); |
282 | waitq_wakeup(&ap_completion_wq, WAKEUP_FIRST); |
283 | scheduler(); |
283 | scheduler(); |
284 | /* not reached */ |
284 | /* not reached */ |
285 | } |
285 | } |
286 | #endif /* CONFIG_SMP */ |
286 | #endif /* CONFIG_SMP */ |
287 | 287 |