WebSVN – HelenOS – Diff – /trunk/kernel/arch/sparc64/src/smp/smp.c


/*
 * Copyright (c) 2006 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.
 */
 
/** @addtogroup sparc64
 * @{
 */
/** @file
 */
 
#include <smp/smp.h>
#include <genarch/ofw/ofw_tree.h>
#include <cpu.h>
#include <arch/cpu.h>
#include <arch.h>
#include <config.h>
#include <macros.h>
#include <arch/types.h>
#include <synch/synch.h>
#include <synch/waitq.h>
#include <print.h>
 
/**
 * This global variable is used to pick-up application processors
 * from their active loop in start.S. When a processor looping in
 * start.S sees that this variable contains its MID, it can
 * proceed with its initialization.
 *
 * This variable is modified only by the bootstrap processor.
 * Other processors access it read-only.
 */
volatile uint64_t waking_up_mid = (uint64_t) -1;
 
/** Determine number of processors. */
void smp_init(void)
{
    ofw_tree_node_t *node;
    count_t cnt = 0;
   
    node = ofw_tree_find_child_by_device_type(ofw_tree_lookup("/"), "cpu");
    while (node) {
        cnt++;
        node = ofw_tree_find_peer_by_device_type(node, "cpu");
    }
   
    config.cpu_count = max(1, cnt);
}
 
/** Wake application processors up. */
void kmp(void *arg)
{
    ofw_tree_node_t *node;
    int i;
   
    node = ofw_tree_find_child_by_device_type(ofw_tree_lookup("/"), "cpu");
    for (i = 0; node; node = ofw_tree_find_peer_by_device_type(node, "cpu"), i++) {
        uint32_t mid;
        ofw_tree_property_t *prop;
       
        prop = ofw_tree_getprop(node, "upa-portid");
        if (!prop || !prop->value)
            continue;
       
        mid = *((uint32_t *) prop->value);
        if (CPU->arch.mid == mid) {
            /*
             * Skip the current CPU.
             */
            continue;
        }
 
        /*
         * Processor with ID == mid can proceed with its initialization.
         */
        waking_up_mid = mid;
       
        if (waitq_sleep_timeout(&ap_completion_wq, 1000000, SYNCH_FLAGS_NONE) == ESYNCH_TIMEOUT)
            printf("%s: waiting for processor (mid = %" PRIu32 ") timed out\n",
                __func__, mid);
    }
}
 
/** @}
 */
 

Rev 2462	Rev 3071
1	/*	1	/*
2	* Copyright (c) 2006 Jakub Jermar	2	* Copyright (c) 2006 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	/** @addtogroup sparc64	29	/** @addtogroup sparc64
30	* @{	30	* @{
31	*/	31	*/
32	/** @file	32	/** @file
33	*/	33	*/
34		34
35	#include <smp/smp.h>	35	#include <smp/smp.h>
36	#include <genarch/ofw/ofw_tree.h>	36	#include <genarch/ofw/ofw_tree.h>
37	#include <cpu.h>	37	#include <cpu.h>
38	#include <arch/cpu.h>	38	#include <arch/cpu.h>
39	#include <arch.h>	39	#include <arch.h>
40	#include <config.h>	40	#include <config.h>
41	#include <macros.h>	41	#include <macros.h>
42	#include <arch/types.h>	42	#include <arch/types.h>
43	#include <synch/synch.h>	43	#include <synch/synch.h>
44	#include <synch/waitq.h>	44	#include <synch/waitq.h>
45	#include <print.h>	45	#include <print.h>
46		46
47	/**	47	/**
48	* This global variable is used to pick-up application processors	48	* This global variable is used to pick-up application processors
49	* from their active loop in start.S. When a processor looping in	49	* from their active loop in start.S. When a processor looping in
50	* start.S sees that this variable contains its MID, it can	50	* start.S sees that this variable contains its MID, it can
51	* proceed with its initialization.	51	* proceed with its initialization.
52	*	52	*
53	* This variable is modified only by the bootstrap processor.	53	* This variable is modified only by the bootstrap processor.
54	* Other processors access it read-only.	54	* Other processors access it read-only.
55	*/	55	*/
56	volatile uint64_t waking_up_mid = (uint64_t) -1;	56	volatile uint64_t waking_up_mid = (uint64_t) -1;
57		57
58	/** Determine number of processors. */	58	/** Determine number of processors. */
59	void smp_init(void)	59	void smp_init(void)
60	{	60	{
61	ofw_tree_node_t *node;	61	ofw_tree_node_t *node;
62	count_t cnt = 0;	62	count_t cnt = 0;
63		63
64	node = ofw_tree_find_child_by_device_type(ofw_tree_lookup("/"), "cpu");	64	node = ofw_tree_find_child_by_device_type(ofw_tree_lookup("/"), "cpu");
65	while (node) {	65	while (node) {
66	cnt++;	66	cnt++;
67	node = ofw_tree_find_peer_by_device_type(node, "cpu");	67	node = ofw_tree_find_peer_by_device_type(node, "cpu");
68	}	68	}
69		69
70	config.cpu_count = max(1, cnt);	70	config.cpu_count = max(1, cnt);
71	}	71	}
72		72
73	/** Wake application processors up. */	73	/** Wake application processors up. */
74	void kmp(void *arg)	74	void kmp(void *arg)
75	{	75	{
76	ofw_tree_node_t *node;	76	ofw_tree_node_t *node;
77	int i;	77	int i;
78		78
79	node = ofw_tree_find_child_by_device_type(ofw_tree_lookup("/"), "cpu");	79	node = ofw_tree_find_child_by_device_type(ofw_tree_lookup("/"), "cpu");
80	for (i = 0; node; node = ofw_tree_find_peer_by_device_type(node, "cpu"), i++) {	80	for (i = 0; node; node = ofw_tree_find_peer_by_device_type(node, "cpu"), i++) {
81	uint32_t mid;	81	uint32_t mid;
82	ofw_tree_property_t *prop;	82	ofw_tree_property_t *prop;
83		83
84	prop = ofw_tree_getprop(node, "upa-portid");	84	prop = ofw_tree_getprop(node, "upa-portid");
85	if (!prop \|\| !prop->value)	85	if (!prop \|\| !prop->value)
86	continue;	86	continue;
87		87
88	mid = ((uint32_t ) prop->value);	88	mid = ((uint32_t ) prop->value);
89	if (CPU->arch.mid == mid) {	89	if (CPU->arch.mid == mid) {
90	/*	90	/*
91	* Skip the current CPU.	91	* Skip the current CPU.
92	*/	92	*/
93	continue;	93	continue;
94	}	94	}
95		95
96	/*	96	/*
97	* Processor with ID == mid can proceed with its initialization.	97	* Processor with ID == mid can proceed with its initialization.
98	*/	98	*/
99	waking_up_mid = mid;	99	waking_up_mid = mid;
100		100
101	if (waitq_sleep_timeout(&ap_completion_wq, 1000000, SYNCH_FLAGS_NONE) == ESYNCH_TIMEOUT)	101	if (waitq_sleep_timeout(&ap_completion_wq, 1000000, SYNCH_FLAGS_NONE) == ESYNCH_TIMEOUT)
102	printf("%s: waiting for processor (mid = %d) timed out\n",	102	printf("%s: waiting for processor (mid = %" PRIu32 ") timed out\n",
103	__func__, mid);	103	__func__, mid);
104	}	104	}
105	}	105	}
106		106
107	/** @}	107	/** @}
108	*/	108	*/
109		109

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(root)/trunk/kernel/arch/sparc64/src/smp/smp.c – Rev 2462 → 3071