2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2003-2004 Juli Mallett. All rights reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
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.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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30 #ifndef _MACHINE_HWFUNC_H_
31 #define _MACHINE_HWFUNC_H_
33 #include <sys/_cpuset.h>
38 * Hooks downward into platform functionality.
40 void platform_reset(void);
41 void platform_start(__register_t, __register_t, __register_t, __register_t);
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 *);
48 /* For hardware specific CPU initialization */
49 void platform_cpu_init(void);
54 * Spin up the AP so that it starts executing MP bootstrap entry point: mpentry
56 * Returns 0 on sucess and non-zero on failure.
58 int platform_start_ap(int processor_id);
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
64 void platform_init_ap(int processor_id);
67 * Return a plaform-specific interrrupt number that is used to deliver IPIs.
69 * This hardware interrupt is used to deliver IPIs exclusively and must
70 * not be used for any other interrupt source.
72 int platform_ipi_hardintr_num(void);
73 int platform_ipi_softintr_num(void);
76 * Trigger a IPI interrupt on 'cpuid'.
78 void platform_ipi_send(int cpuid);
81 * Quiesce the IPI interrupt source on the current cpu.
83 void platform_ipi_clear(void);
86 * Return the processor id.
88 * Note that this function is called in early boot when stack is not available.
90 extern int platform_processor_id(void);
93 * Return the cpumask of available processors.
95 extern void platform_cpu_mask(cpuset_t *mask);
98 * Return the topology of processors on this platform
100 struct cpu_group *platform_smp_topo(void);
104 #endif /* !_MACHINE_HWFUNC_H_ */