2 * Copyright (c) 2013, 2014 Robin Randhawa
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #ifndef _MACHINE_PSCI_H_
30 #define _MACHINE_PSCI_H_
32 #include <sys/types.h>
34 typedef int (*psci_initfn_t)(device_t dev);
35 typedef int (*psci_callfn_t)(register_t, register_t, register_t, register_t);
37 extern int psci_present;
39 int psci_cpu_on(unsigned long, unsigned long, unsigned long);
40 void psci_reset(void);
41 int32_t psci_features(uint32_t);
42 int psci_get_version(void);
44 /* Handler to let us call into the PSCI/SMCCC firmware */
45 extern psci_callfn_t psci_callfn;
47 psci_call(register_t a, register_t b, register_t c, register_t d)
50 return (psci_callfn(a, b, c, d));
52 /* One of these handlers will be selected during the boot */
53 int psci_hvc_despatch(register_t, register_t, register_t, register_t);
54 int psci_smc_despatch(register_t, register_t, register_t, register_t);
60 #define PSCI_RETVAL_SUCCESS 0
61 #define PSCI_RETVAL_NOT_SUPPORTED -1
62 #define PSCI_RETVAL_INVALID_PARAMS -2
63 #define PSCI_RETVAL_DENIED -3
64 #define PSCI_RETVAL_ALREADY_ON -4
65 #define PSCI_RETVAL_ON_PENDING -5
66 #define PSCI_RETVAL_INTERNAL_FAILURE -6
67 #define PSCI_RETVAL_NOT_PRESENT -7
68 #define PSCI_RETVAL_DISABLED -8
70 * Used to signal PSCI is not available, e.g. to start a CPU.
72 #define PSCI_MISSING 1
75 * PSCI function codes (as per PSCI v0.2).
78 #define PSCI_FNID_VERSION 0x84000000
79 #define PSCI_FNID_CPU_SUSPEND 0xc4000001
80 #define PSCI_FNID_CPU_OFF 0x84000002
81 #define PSCI_FNID_CPU_ON 0xc4000003
82 #define PSCI_FNID_AFFINITY_INFO 0xc4000004
83 #define PSCI_FNID_MIGRATE 0xc4000005
84 #define PSCI_FNID_MIGRATE_INFO_TYPE 0x84000006
85 #define PSCI_FNID_MIGRATE_INFO_UP_CPU 0xc4000007
86 #define PSCI_FNID_SYSTEM_OFF 0x84000008
87 #define PSCI_FNID_SYSTEM_RESET 0x84000009
88 #define PSCI_FNID_FEATURES 0x8400000a
90 #define PSCI_FNID_VERSION 0x84000000
91 #define PSCI_FNID_CPU_SUSPEND 0x84000001
92 #define PSCI_FNID_CPU_OFF 0x84000002
93 #define PSCI_FNID_CPU_ON 0x84000003
94 #define PSCI_FNID_AFFINITY_INFO 0x84000004
95 #define PSCI_FNID_MIGRATE 0x84000005
96 #define PSCI_FNID_MIGRATE_INFO_TYPE 0x84000006
97 #define PSCI_FNID_MIGRATE_INFO_UP_CPU 0x84000007
98 #define PSCI_FNID_SYSTEM_OFF 0x84000008
99 #define PSCI_FNID_SYSTEM_RESET 0x84000009
100 #define PSCI_FNID_FEATURES 0x8400000a
103 #define PSCI_VER_MAJOR(v) (((v) >> 16) & 0xFF)
104 #define PSCI_VER_MINOR(v) ((v) & 0xFF)
111 PSCI_FN_AFFINITY_INFO,
113 PSCI_FN_MIGRATE_INFO_TYPE,
114 PSCI_FN_MIGRATE_INFO_UP_CPU,
116 PSCI_FN_SYSTEM_RESET,
120 #endif /* _MACHINE_PSCI_H_ */