2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2019 Mitchell Horne <mhorne@FreeBSD.org>
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
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
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
31 #include <sys/param.h>
32 #include <sys/kernel.h>
33 #include <sys/systm.h>
34 #include <sys/types.h>
35 #include <sys/eventhandler.h>
36 #include <sys/reboot.h>
38 #include <machine/md_var.h>
39 #include <machine/sbi.h>
41 /* SBI Implementation-Specific Definitions */
42 #define OPENSBI_VERSION_MAJOR_OFFSET 16
43 #define OPENSBI_VERSION_MINOR_MASK 0xFFFF
45 u_long sbi_spec_version;
47 u_long sbi_impl_version;
50 sbi_get_spec_version(void)
52 return (SBI_CALL0(SBI_EXT_ID_BASE, SBI_BASE_GET_SPEC_VERSION));
58 return (SBI_CALL0(SBI_EXT_ID_BASE, SBI_BASE_GET_IMPL_ID));
62 sbi_get_impl_version(void)
64 return (SBI_CALL0(SBI_EXT_ID_BASE, SBI_BASE_GET_IMPL_VERSION));
68 sbi_get_mvendorid(void)
70 return (SBI_CALL0(SBI_EXT_ID_BASE, SBI_BASE_GET_MVENDORID));
76 return (SBI_CALL0(SBI_EXT_ID_BASE, SBI_BASE_GET_MARCHID));
82 return (SBI_CALL0(SBI_EXT_ID_BASE, SBI_BASE_GET_MIMPID));
86 sbi_shutdown_final(void *dummy __unused, int howto)
88 if ((howto & RB_POWEROFF) != 0)
93 sbi_print_version(void)
98 /* For legacy SBI implementations. */
99 if (sbi_spec_version == 0) {
100 printf("SBI: Unknown (Legacy) Implementation\n");
101 printf("SBI Specification Version: 0.1\n");
105 switch (sbi_impl_id) {
106 case (SBI_IMPL_ID_BBL):
107 printf("SBI: Berkely Boot Loader %lu\n", sbi_impl_version);
109 case (SBI_IMPL_ID_OPENSBI):
110 major = sbi_impl_version >> OPENSBI_VERSION_MAJOR_OFFSET;
111 minor = sbi_impl_version & OPENSBI_VERSION_MINOR_MASK;
112 printf("SBI: OpenSBI v%u.%u\n", major, minor);
115 printf("SBI: Unrecognized Implementation: %lu\n", sbi_impl_id);
119 major = (sbi_spec_version & SBI_SPEC_VERS_MAJOR_MASK) >>
120 SBI_SPEC_VERS_MAJOR_OFFSET;
121 minor = (sbi_spec_version & SBI_SPEC_VERS_MINOR_MASK);
122 printf("SBI Specification Version: %u.%u\n", major, minor);
126 sbi_hsm_hart_start(u_long hart, u_long start_addr, u_long priv)
130 ret = SBI_CALL3(SBI_EXT_ID_HSM, SBI_HSM_HART_START, hart, start_addr, priv);
131 return (ret.error != 0 ? (int)ret.error : 0);
135 sbi_hsm_hart_stop(void)
137 (void)SBI_CALL0(SBI_EXT_ID_HSM, SBI_HSM_HART_STOP);
141 sbi_hsm_hart_status(u_long hart)
145 ret = SBI_CALL1(SBI_EXT_ID_HSM, SBI_HSM_HART_STATUS, hart);
147 return (ret.error != 0 ? (int)ret.error : (int)ret.value);
156 * Get the spec version. For legacy SBI implementations this will
157 * return an error, otherwise it is guaranteed to succeed.
159 sret = sbi_get_spec_version();
160 if (sret.error != 0) {
161 /* We are running a legacy SBI implementation. */
162 sbi_spec_version = 0;
166 /* Set the SBI implementation info. */
167 sbi_spec_version = sret.value;
168 sbi_impl_id = sbi_get_impl_id().value;
169 sbi_impl_version = sbi_get_impl_version().value;
171 /* Set the hardware implementation info. */
172 mvendorid = sbi_get_mvendorid().value;
173 marchid = sbi_get_marchid().value;
174 mimpid = sbi_get_mimpid().value;
177 * Probe for legacy extensions. Currently we rely on all of them
178 * to be implemented, but this is not guaranteed by the spec.
180 KASSERT(sbi_probe_extension(SBI_SET_TIMER) != 0,
181 ("SBI doesn't implement sbi_set_timer()"));
182 KASSERT(sbi_probe_extension(SBI_CONSOLE_PUTCHAR) != 0,
183 ("SBI doesn't implement sbi_console_putchar()"));
184 KASSERT(sbi_probe_extension(SBI_CONSOLE_GETCHAR) != 0,
185 ("SBI doesn't implement sbi_console_getchar()"));
186 KASSERT(sbi_probe_extension(SBI_CLEAR_IPI) != 0,
187 ("SBI doesn't implement sbi_clear_ipi()"));
188 KASSERT(sbi_probe_extension(SBI_SEND_IPI) != 0,
189 ("SBI doesn't implement sbi_send_ipi()"));
190 KASSERT(sbi_probe_extension(SBI_REMOTE_FENCE_I) != 0,
191 ("SBI doesn't implement sbi_remote_fence_i()"));
192 KASSERT(sbi_probe_extension(SBI_REMOTE_SFENCE_VMA) != 0,
193 ("SBI doesn't implement sbi_remote_sfence_vma()"));
194 KASSERT(sbi_probe_extension(SBI_REMOTE_SFENCE_VMA_ASID) != 0,
195 ("SBI doesn't implement sbi_remote_sfence_vma_asid()"));
196 KASSERT(sbi_probe_extension(SBI_SHUTDOWN) != 0,
197 ("SBI doesn't implement sbi_shutdown()"));
201 sbi_late_init(void *dummy __unused)
203 EVENTHANDLER_REGISTER(shutdown_final, sbi_shutdown_final, NULL,
207 SYSINIT(sbi, SI_SUB_KLD, SI_ORDER_ANY, sbi_late_init, NULL);