1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2003-2004 Juli Mallett. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 * $FreeBSD$
28 */
29
30 #ifndef _MACHINE_HWFUNC_H_
31 #define _MACHINE_HWFUNC_H_
32
33 #include <sys/_cpuset.h>
34
35 struct timecounter;
36
37 /*
38 * Hooks downward into platform functionality.
39 */
40 void platform_reset(void);
41 void platform_start(__register_t, __register_t, __register_t, __register_t);
42
43 /* For clocks and ticks and such */
44 void platform_initclocks(void);
45 uint64_t platform_get_frequency(void);
46 unsigned platform_get_timecount(struct timecounter *);
47
48 /* For hardware specific CPU initialization */
49 void platform_cpu_init(void);
50
51 #ifdef SMP
52
53 /*
54 * Spin up the AP so that it starts executing MP bootstrap entry point: mpentry
55 *
56 * Returns 0 on sucess and non-zero on failure.
57 */
58 int platform_start_ap(int processor_id);
59
60 /*
61 * Platform-specific initialization that needs to be done when an AP starts
62 * running. This function is called from the MP bootstrap code in mpboot.S
63 */
64 void platform_init_ap(int processor_id);
65
66 /*
67 * Return a plaform-specific interrrupt number that is used to deliver IPIs.
68 *
69 * This hardware interrupt is used to deliver IPIs exclusively and must
70 * not be used for any other interrupt source.
71 */
72 int platform_ipi_hardintr_num(void);
73 int platform_ipi_softintr_num(void);
74
75 #ifdef PLATFORM_INIT_SECONDARY
76 /*
77 * Set up IPIs for this CPU.
78 */
79 void platform_init_secondary(int cpuid);
80 #endif
81
82 /*
83 * Trigger a IPI interrupt on 'cpuid'.
84 */
85 void platform_ipi_send(int cpuid);
86
87 /*
88 * Quiesce the IPI interrupt source on the current cpu.
89 */
90 void platform_ipi_clear(void);
91
92 /*
93 * Return the processor id.
94 *
95 * Note that this function is called in early boot when stack is not available.
96 */
97 extern int platform_processor_id(void);
98
99 /*
100 * Return the cpumask of available processors.
101 */
102 extern void platform_cpu_mask(cpuset_t *mask);
103
104 /*
105 * Return the topology of processors on this platform
106 */
107 struct cpu_group *platform_smp_topo(void);
108
109 #endif /* SMP */
110
111 #endif /* !_MACHINE_HWFUNC_H_ */
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