WebSVN – HelenOS-historic – Diff – /kernel/trunk/generic/src/main/main.c


/*
 * Copyright (C) 2001-2004 Jakub Jermar
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
#include <arch/asm.h>
#include <context.h>
#include <print.h>
#include <panic.h>
#include <config.h>
#include <time/clock.h>
#include <proc/scheduler.h>
#include <proc/thread.h>
#include <proc/task.h>
#include <main/kinit.h>
#include <cpu.h>
#include <align.h>
 
#ifdef CONFIG_SMP
#include <arch/smp/apic.h>
#include <arch/smp/mps.h>
#endif /* CONFIG_SMP */
 
#include <smp/smp.h>
 
#include <arch/mm/memory_init.h>
#include <mm/heap.h>
#include <mm/frame.h>
#include <mm/page.h>
#include <mm/tlb.h>
#include <mm/vm.h>
 
#include <synch/waitq.h>
 
#include <arch/arch.h>
#include <arch.h>
#include <arch/faddr.h>
 
#include <typedefs.h>
 
char *project = "SPARTAN kernel";
char *copyright = "Copyright (C) 2001-2005 Jakub Jermar\nCopyright (C) 2005 HelenOS project";
 
config_t config;
context_t ctx;
 
/*
 * These 'hardcoded' variables will be intialised by
 * the linker or the low level assembler code with
 * appropriate sizes and addresses.
 */
__address hardcoded_load_address = 0;
size_t hardcoded_ktext_size = 0;
size_t hardcoded_kdata_size = 0;
 
/*
 * Size of memory in bytes taken by kernel and heap.
 */
static size_t kernel_size;
 
/*
 * Size of heap.
 */
static size_t heap_size;
 
 
/*
 * Extra space between heap and stack
 * enforced by alignment requirements.
 */
static size_t heap_delta;
 
void main_bsp(void);
void main_ap(void);
 
/*
 * These two functions prevent stack from underflowing during the
 * kernel boot phase when SP is set to the very top of the reserved
 * space. The stack could get corrupted by a fooled compiler-generated
 * pop sequence otherwise.
 */
static void main_bsp_separated_stack(void);
static void main_ap_separated_stack(void);
 
/** Bootstrap CPU main kernel routine
 *
 * Initializes the kernel by bootstrap CPU.
 *
 * Assuming interrupts_disable().
 *
 */
void main_bsp(void)
{
    config.cpu_count = 1;
    config.cpu_active = 1;
    config.base = hardcoded_load_address;
    config.memory_size = get_memory_size();
 
    heap_size = CONFIG_HEAP_SIZE + (config.memory_size/FRAME_SIZE)*sizeof(frame_t);
    kernel_size = ALIGN(hardcoded_ktext_size + hardcoded_kdata_size + heap_size, PAGE_SIZE);
    heap_delta = kernel_size - (hardcoded_ktext_size + hardcoded_kdata_size + heap_size);
   
    config.kernel_size = kernel_size + CONFIG_STACK_SIZE;
   
    context_save(&ctx);
    early_mapping(config.base + hardcoded_ktext_size + hardcoded_kdata_size, CONFIG_STACK_SIZE + heap_size + heap_delta);
    context_set(&ctx, FADDR(main_bsp_separated_stack), config.base + kernel_size, CONFIG_STACK_SIZE);
    context_restore(&ctx);
    /* not reached */
}
 
 
/** Bootstrap CPU main kernel routine stack wrapper
 *
 * Second part of main_bsp().
 *
 */
void main_bsp_separated_stack(void)
{
    vm_t *m;
    task_t *k;
    thread_t *t;
   
    the_initialize(THE);
   
    arch_pre_mm_init();
    early_heap_init(config.base + hardcoded_ktext_size + hardcoded_kdata_size, heap_size + heap_delta);
    frame_init();
    page_init();
    tlb_init();
    arch_post_mm_init();
 
    printf("%s\n%s\n", project, copyright);
    printf("%P: hardcoded_ktext_size=%dK, hardcoded_kdata_size=%dK\n",
        config.base, hardcoded_ktext_size/1024, hardcoded_kdata_size/1024);
 
    arch_late_init();
   
    smp_init();
    printf("config.memory_size=%dM\n", config.memory_size/(1024*1024));
    printf("config.cpu_count=%d\n", config.cpu_count);
 
    cpu_init();
 
    calibrate_delay_loop();
   
    timeout_init();
    scheduler_init();
    task_init();
    thread_init();
 
    /*
     * Create kernel vm mapping.
     */
    m = vm_create(GET_PTL0_ADDRESS());
    if (!m)
        panic("can't create kernel vm address space\n");
 
    /*
     * Create kernel task.
     */
    k = task_create(m);
    if (!k)
        panic("can't create kernel task\n");
       
    /*
     * Create the first thread.
     */
    t = thread_create(kinit, NULL, k, 0);
    if (!t)
        panic("can't create kinit thread\n");
    thread_ready(t);
    /*
     * This call to scheduler() will return to kinit,
     * starting the thread of kernel threads.
     */
    scheduler();
    /* not reached */
}
 
 
#ifdef CONFIG_SMP
/** Application CPUs main kernel routine
 *
 * Executed by application processors, temporary stack
 * is at ctx.sp which was set during BP boot.
 *
 * Assuming interrupts_disable()'d.
 *
 */
void main_ap(void)
{
    /*
     * Incrementing the active CPU counter will guarantee that the
     * pm_init() will not attempt to build GDT and IDT tables again.
     * Neither frame_init() will do the complete thing. Neither cpu_init()
     * will do.
     */
    config.cpu_active++;
 
    /*
     * The THE structure is well defined because ctx.sp is used as stack.
     */
    the_initialize(THE);
   
    arch_pre_mm_init();
    frame_init();
    page_init();
    tlb_init();
    arch_post_mm_init();
   
    cpu_init();
   
    calibrate_delay_loop();
 
    l_apic_init();
    l_apic_debug();
 
    the_copy(THE, (the_t *) CPU->stack);
 
    /*
     * If we woke kmp up before we left the kernel stack, we could
     * collide with another CPU coming up. To prevent this, we
     * switch to this cpu's private stack prior to waking kmp up.
     */
    context_set(&CPU->saved_context, FADDR(main_ap_separated_stack), (__address) CPU->stack, CPU_STACK_SIZE);
    context_restore(&CPU->saved_context);
    /* not reached */
}
 
 
/** Application CPUs main kernel routine stack wrapper
 *
 * Second part of main_ap().
 *
 */
void main_ap_separated_stack(void)
{
    /*
     * Configure timeouts for this cpu.
     */
    timeout_init();
 
    waitq_wakeup(&ap_completion_wq, WAKEUP_FIRST);
    scheduler();
    /* not reached */
}
#endif /* CONFIG_SMP */
 

Rev 430	Rev 458
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 <config.h>	33	#include <config.h>
34	#include <time/clock.h>	34	#include <time/clock.h>
35	#include <proc/scheduler.h>	35	#include <proc/scheduler.h>
36	#include <proc/thread.h>	36	#include <proc/thread.h>
37	#include <proc/task.h>	37	#include <proc/task.h>
38	#include <main/kinit.h>	38	#include <main/kinit.h>
39	#include <cpu.h>	39	#include <cpu.h>
40	#include <align.h>	40	#include <align.h>
41		41
42	#ifdef __SMP__	42	#ifdef CONFIG_SMP
43	#include <arch/smp/apic.h>	43	#include <arch/smp/apic.h>
44	#include <arch/smp/mps.h>	44	#include <arch/smp/mps.h>
45	#endif /* __SMP__ */	45	#endif /* CONFIG_SMP */
46		46
47	#include <smp/smp.h>	47	#include <smp/smp.h>
48		48
49	#include <arch/mm/memory_init.h>	49	#include <arch/mm/memory_init.h>
50	#include <mm/heap.h>	50	#include <mm/heap.h>
51	#include <mm/frame.h>	51	#include <mm/frame.h>
52	#include <mm/page.h>	52	#include <mm/page.h>
53	#include <mm/tlb.h>	53	#include <mm/tlb.h>
54	#include <mm/vm.h>	54	#include <mm/vm.h>
55		55
56	#include <synch/waitq.h>	56	#include <synch/waitq.h>
57		57
58	#include <arch/arch.h>	58	#include <arch/arch.h>
59	#include <arch.h>	59	#include <arch.h>
60	#include <arch/faddr.h>	60	#include <arch/faddr.h>
61		61
62	#include <typedefs.h>	62	#include <typedefs.h>
63		63
64	char *project = "SPARTAN kernel";	64	char *project = "SPARTAN kernel";
65	char *copyright = "Copyright (C) 2001-2005 Jakub Jermar\nCopyright (C) 2005 HelenOS project";	65	char *copyright = "Copyright (C) 2001-2005 Jakub Jermar\nCopyright (C) 2005 HelenOS project";
66		66
67	config_t config;	67	config_t config;
68	context_t ctx;	68	context_t ctx;
69		69
70	/*	70	/*
71	* These 'hardcoded' variables will be intialised by	71	* These 'hardcoded' variables will be intialised by
72	* the linker or the low level assembler code with	72	* the linker or the low level assembler code with
73	* appropriate sizes and addresses.	73	* appropriate sizes and addresses.
74	*/	74	*/
75	__address hardcoded_load_address = 0;	75	__address hardcoded_load_address = 0;
76	size_t hardcoded_ktext_size = 0;	76	size_t hardcoded_ktext_size = 0;
77	size_t hardcoded_kdata_size = 0;	77	size_t hardcoded_kdata_size = 0;
78		78
79	/*	79	/*
80	* Size of memory in bytes taken by kernel and heap.	80	* Size of memory in bytes taken by kernel and heap.
81	*/	81	*/
82	static size_t kernel_size;	82	static size_t kernel_size;
83		83
84	/*	84	/*
85	* Size of heap.	85	* Size of heap.
86	*/	86	*/
87	static size_t heap_size;	87	static size_t heap_size;
88		88
89		89
90	/*	90	/*
91	* Extra space between heap and stack	91	* Extra space between heap and stack
92	* enforced by alignment requirements.	92	* enforced by alignment requirements.
93	*/	93	*/
94	static size_t heap_delta;	94	static size_t heap_delta;
95		95
96	void main_bsp(void);	96	void main_bsp(void);
97	void main_ap(void);	97	void main_ap(void);
98		98
99	/*	99	/*
100	* These two functions prevent stack from underflowing during the	100	* These two functions prevent stack from underflowing during the
101	* kernel boot phase when SP is set to the very top of the reserved	101	* kernel boot phase when SP is set to the very top of the reserved
102	* space. The stack could get corrupted by a fooled compiler-generated	102	* space. The stack could get corrupted by a fooled compiler-generated
103	* pop sequence otherwise.	103	* pop sequence otherwise.
104	*/	104	*/
105	static void main_bsp_separated_stack(void);	105	static void main_bsp_separated_stack(void);
106	static void main_ap_separated_stack(void);	106	static void main_ap_separated_stack(void);
107		107
108	/** Bootstrap CPU main kernel routine	108	/** Bootstrap CPU main kernel routine
109	*	109	*
110	* Initializes the kernel by bootstrap CPU.	110	* Initializes the kernel by bootstrap CPU.
111	*	111	*
112	* Assuming interrupts_disable().	112	* Assuming interrupts_disable().
113	*	113	*
114	*/	114	*/
115	void main_bsp(void)	115	void main_bsp(void)
116	{	116	{
117	config.cpu_count = 1;	117	config.cpu_count = 1;
118	config.cpu_active = 1;	118	config.cpu_active = 1;
119	config.base = hardcoded_load_address;	119	config.base = hardcoded_load_address;
120	config.memory_size = get_memory_size();	120	config.memory_size = get_memory_size();
121		121
122	heap_size = CONFIG_HEAP_SIZE + (config.memory_size/FRAME_SIZE)*sizeof(frame_t);	122	heap_size = CONFIG_HEAP_SIZE + (config.memory_size/FRAME_SIZE)*sizeof(frame_t);
123	kernel_size = ALIGN(hardcoded_ktext_size + hardcoded_kdata_size + heap_size, PAGE_SIZE);	123	kernel_size = ALIGN(hardcoded_ktext_size + hardcoded_kdata_size + heap_size, PAGE_SIZE);
124	heap_delta = kernel_size - (hardcoded_ktext_size + hardcoded_kdata_size + heap_size);	124	heap_delta = kernel_size - (hardcoded_ktext_size + hardcoded_kdata_size + heap_size);
125		125
126	config.kernel_size = kernel_size + CONFIG_STACK_SIZE;	126	config.kernel_size = kernel_size + CONFIG_STACK_SIZE;
127		127
128	context_save(&ctx);	128	context_save(&ctx);
129	early_mapping(config.base + hardcoded_ktext_size + hardcoded_kdata_size, CONFIG_STACK_SIZE + heap_size + heap_delta);	129	early_mapping(config.base + hardcoded_ktext_size + hardcoded_kdata_size, CONFIG_STACK_SIZE + heap_size + heap_delta);
130	context_set(&ctx, FADDR(main_bsp_separated_stack), config.base + kernel_size, CONFIG_STACK_SIZE);	130	context_set(&ctx, FADDR(main_bsp_separated_stack), config.base + kernel_size, 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	vm_t *m;	143	vm_t *m;
144	task_t *k;	144	task_t *k;
145	thread_t *t;	145	thread_t *t;
146		146
147	the_initialize(THE);	147	the_initialize(THE);
148		148
149	arch_pre_mm_init();	149	arch_pre_mm_init();
150	early_heap_init(config.base + hardcoded_ktext_size + hardcoded_kdata_size, heap_size + heap_delta);	150	early_heap_init(config.base + hardcoded_ktext_size + hardcoded_kdata_size, heap_size + heap_delta);
151	frame_init();	151	frame_init();
152	page_init();	152	page_init();
153	tlb_init();	153	tlb_init();
154	arch_post_mm_init();	154	arch_post_mm_init();
155		155
156	printf("%s\n%s\n", project, copyright);	156	printf("%s\n%s\n", project, copyright);
157	printf("%P: hardcoded_ktext_size=%dK, hardcoded_kdata_size=%dK\n",	157	printf("%P: hardcoded_ktext_size=%dK, hardcoded_kdata_size=%dK\n",
158	config.base, hardcoded_ktext_size/1024, hardcoded_kdata_size/1024);	158	config.base, hardcoded_ktext_size/1024, hardcoded_kdata_size/1024);
159		159
160	arch_late_init();	160	arch_late_init();
161		161
162	smp_init();	162	smp_init();
163	printf("config.memory_size=%dM\n", config.memory_size/(1024*1024));	163	printf("config.memory_size=%dM\n", config.memory_size/(1024*1024));
164	printf("config.cpu_count=%d\n", config.cpu_count);	164	printf("config.cpu_count=%d\n", config.cpu_count);
165		165
166	cpu_init();	166	cpu_init();
167		167
168	calibrate_delay_loop();	168	calibrate_delay_loop();
169		169
170	timeout_init();	170	timeout_init();
171	scheduler_init();	171	scheduler_init();
172	task_init();	172	task_init();
173	thread_init();	173	thread_init();
174		174
175	/*	175	/*
176	* Create kernel vm mapping.	176	* Create kernel vm mapping.
177	*/	177	*/
178	m = vm_create(GET_PTL0_ADDRESS());	178	m = vm_create(GET_PTL0_ADDRESS());
179	if (!m)	179	if (!m)
180	panic("can't create kernel vm address space\n");	180	panic("can't create kernel vm address space\n");
181		181
182	/*	182	/*
183	* Create kernel task.	183	* Create kernel task.
184	*/	184	*/
185	k = task_create(m);	185	k = task_create(m);
186	if (!k)	186	if (!k)
187	panic("can't create kernel task\n");	187	panic("can't create kernel task\n");
188		188
189	/*	189	/*
190	* Create the first thread.	190	* Create the first thread.
191	*/	191	*/
192	t = thread_create(kinit, NULL, k, 0);	192	t = thread_create(kinit, NULL, k, 0);
193	if (!t)	193	if (!t)
194	panic("can't create kinit thread\n");	194	panic("can't create kinit thread\n");
195	thread_ready(t);	195	thread_ready(t);
196	/*	196	/*
197	* This call to scheduler() will return to kinit,	197	* This call to scheduler() will return to kinit,
198	* starting the thread of kernel threads.	198	* starting the thread of kernel threads.
199	*/	199	*/
200	scheduler();	200	scheduler();
201	/* not reached */	201	/* not reached */
202	}	202	}
203		203
204		204
205	#ifdef __SMP__	205	#ifdef CONFIG_SMP
206	/** Application CPUs main kernel routine	206	/** Application CPUs main kernel routine
207	*	207	*
208	* Executed by application processors, temporary stack	208	* Executed by application processors, temporary stack
209	* is at ctx.sp which was set during BP boot.	209	* is at ctx.sp which was set during BP boot.
210	*	210	*
211	* Assuming interrupts_disable()'d.	211	* Assuming interrupts_disable()'d.
212	*	212	*
213	*/	213	*/
214	void main_ap(void)	214	void main_ap(void)
215	{	215	{
216	/*	216	/*
217	* Incrementing the active CPU counter will guarantee that the	217	* Incrementing the active CPU counter will guarantee that the
218	* pm_init() will not attempt to build GDT and IDT tables again.	218	* pm_init() will not attempt to build GDT and IDT tables again.
219	* Neither frame_init() will do the complete thing. Neither cpu_init()	219	* Neither frame_init() will do the complete thing. Neither cpu_init()
220	* will do.	220	* will do.
221	*/	221	*/
222	config.cpu_active++;	222	config.cpu_active++;
223		223
224	/*	224	/*
225	* The THE structure is well defined because ctx.sp is used as stack.	225	* The THE structure is well defined because ctx.sp is used as stack.
226	*/	226	*/
227	the_initialize(THE);	227	the_initialize(THE);
228		228
229	arch_pre_mm_init();	229	arch_pre_mm_init();
230	frame_init();	230	frame_init();
231	page_init();	231	page_init();
232	tlb_init();	232	tlb_init();
233	arch_post_mm_init();	233	arch_post_mm_init();
234		234
235	cpu_init();	235	cpu_init();
236		236
237	calibrate_delay_loop();	237	calibrate_delay_loop();
238		238
239	l_apic_init();	239	l_apic_init();
240	l_apic_debug();	240	l_apic_debug();
241		241
242	the_copy(THE, (the_t *) CPU->stack);	242	the_copy(THE, (the_t *) CPU->stack);
243		243
244	/*	244	/*
245	* If we woke kmp up before we left the kernel stack, we could	245	* If we woke kmp up before we left the kernel stack, we could
246	* collide with another CPU coming up. To prevent this, we	246	* collide with another CPU coming up. To prevent this, we
247	* switch to this cpu's private stack prior to waking kmp up.	247	* switch to this cpu's private stack prior to waking kmp up.
248	*/	248	*/
249	context_set(&CPU->saved_context, FADDR(main_ap_separated_stack), (__address) CPU->stack, CPU_STACK_SIZE);	249	context_set(&CPU->saved_context, FADDR(main_ap_separated_stack), (__address) CPU->stack, CPU_STACK_SIZE);
250	context_restore(&CPU->saved_context);	250	context_restore(&CPU->saved_context);
251	/* not reached */	251	/* not reached */
252	}	252	}
253		253
254		254
255	/** Application CPUs main kernel routine stack wrapper	255	/** Application CPUs main kernel routine stack wrapper
256	*	256	*
257	* Second part of main_ap().	257	* Second part of main_ap().
258	*	258	*
259	*/	259	*/
260	void main_ap_separated_stack(void)	260	void main_ap_separated_stack(void)
261	{	261	{
262	/*	262	/*
263	* Configure timeouts for this cpu.	263	* Configure timeouts for this cpu.
264	*/	264	*/
265	timeout_init();	265	timeout_init();
266		266
267	waitq_wakeup(&ap_completion_wq, WAKEUP_FIRST);	267	waitq_wakeup(&ap_completion_wq, WAKEUP_FIRST);
268	scheduler();	268	scheduler();
269	/* not reached */	269	/* not reached */
270	}	270	}
271	#endif /* __SMP__*/	271	#endif /* CONFIG_SMP */
272		272

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/generic/src/main/main.c @ 1780 – Rev 430 → 458