/* * Copyright (c) 2006-2021, RT-Thread Development Team * * SPDX-License-Identifier: Apache-2.0 * * Change Logs: * Date Author Notes * 2021-05-18 Bernard port from FreeBSD */ /*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * Copyright (c) 2019 Mitchell Horne * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. 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. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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. */ #include "sbi.h" #include #include /* SBI Implementation-Specific Definitions */ #define OPENSBI_VERSION_MAJOR_OFFSET 16 #define OPENSBI_VERSION_MINOR_MASK 0xFFFF unsigned long sbi_spec_version; unsigned long sbi_impl_id; unsigned long sbi_impl_version; static bool has_time_extension = false; static bool has_ipi_extension = false; static bool has_rfnc_extension = false; static struct sbi_ret sbi_get_spec_version(void) { return (SBI_CALL0(SBI_EXT_ID_BASE, SBI_BASE_GET_SPEC_VERSION)); } static struct sbi_ret sbi_get_impl_id(void) { return (SBI_CALL0(SBI_EXT_ID_BASE, SBI_BASE_GET_IMPL_ID)); } static struct sbi_ret sbi_get_impl_version(void) { return (SBI_CALL0(SBI_EXT_ID_BASE, SBI_BASE_GET_IMPL_VERSION)); } void sbi_print_version(void) { int major; int minor; /* For legacy SBI implementations. */ if (sbi_spec_version == 0) { rt_kprintf("SBI: Unknown (Legacy) Implementation\n"); rt_kprintf("SBI Specification Version: 0.1\n"); return; } switch (sbi_impl_id) { case (SBI_IMPL_ID_BBL): rt_kprintf("SBI: Berkely Boot Loader %lu\n", sbi_impl_version); break; case (SBI_IMPL_ID_XVISOR): rt_kprintf("SBI: eXtensible Versatile hypervISOR %lu\n", sbi_impl_version); break; case (SBI_IMPL_ID_KVM): rt_kprintf("SBI: Kernel-based Virtual Machine %lu\n", sbi_impl_version); break; case (SBI_IMPL_ID_RUSTSBI): rt_kprintf("SBI: RustSBI %lu\n", sbi_impl_version); break; case (SBI_IMPL_ID_DIOSIX): rt_kprintf("SBI: Diosix %lu\n", sbi_impl_version); break; case (SBI_IMPL_ID_OPENSBI): major = sbi_impl_version >> OPENSBI_VERSION_MAJOR_OFFSET; minor = sbi_impl_version & OPENSBI_VERSION_MINOR_MASK; rt_kprintf("SBI: OpenSBI v%u.%u\n", major, minor); break; default: rt_kprintf("SBI: Unrecognized Implementation: %lu\n", sbi_impl_id); break; } major = (sbi_spec_version & SBI_SPEC_VERS_MAJOR_MASK) >> SBI_SPEC_VERS_MAJOR_OFFSET; minor = (sbi_spec_version & SBI_SPEC_VERS_MINOR_MASK); rt_kprintf("SBI Specification Version: %u.%u\n", major, minor); } void sbi_set_timer(uint64_t val) { struct sbi_ret ret; /* Use the TIME legacy replacement extension, if available. */ if (has_time_extension) { ret = SBI_CALL1(SBI_EXT_ID_TIME, SBI_TIME_SET_TIMER, val); RT_ASSERT(ret.error == SBI_SUCCESS); } else { (void)SBI_CALL1(SBI_SET_TIMER, 0, val); } } void sbi_send_ipi(const unsigned long *hart_mask) { struct sbi_ret ret; /* Use the IPI legacy replacement extension, if available. */ if (has_ipi_extension) { ret = SBI_CALL2(SBI_EXT_ID_IPI, SBI_IPI_SEND_IPI, *hart_mask, 0); RT_ASSERT(ret.error == SBI_SUCCESS); } else { (void)SBI_CALL1(SBI_SEND_IPI, 0, (uint64_t)hart_mask); } } void sbi_remote_fence_i(const unsigned long *hart_mask) { struct sbi_ret ret; /* Use the RFENCE legacy replacement extension, if available. */ if (has_rfnc_extension) { ret = SBI_CALL2(SBI_EXT_ID_RFNC, SBI_RFNC_REMOTE_FENCE_I, *hart_mask, 0); RT_ASSERT(ret.error == SBI_SUCCESS); } else { (void)SBI_CALL1(SBI_REMOTE_FENCE_I, 0, (uint64_t)hart_mask); } } void sbi_remote_sfence_vma(const unsigned long *hart_mask, unsigned long start, unsigned long size) { struct sbi_ret ret; /* Use the RFENCE legacy replacement extension, if available. */ if (has_rfnc_extension) { ret = SBI_CALL4(SBI_EXT_ID_RFNC, SBI_RFNC_REMOTE_SFENCE_VMA, *hart_mask, 0, start, size); RT_ASSERT(ret.error == SBI_SUCCESS); } else { (void)SBI_CALL3(SBI_REMOTE_SFENCE_VMA, 0, (uint64_t)hart_mask, start, size); } } void sbi_remote_sfence_vma_asid(const unsigned long *hart_mask, unsigned long start, unsigned long size, unsigned long asid) { struct sbi_ret ret; /* Use the RFENCE legacy replacement extension, if available. */ if (has_rfnc_extension) { ret = SBI_CALL5(SBI_EXT_ID_RFNC, SBI_RFNC_REMOTE_SFENCE_VMA_ASID, *hart_mask, 0, start, size, asid); RT_ASSERT(ret.error == SBI_SUCCESS); } else { (void)SBI_CALL4(SBI_REMOTE_SFENCE_VMA_ASID, 0, (uint64_t)hart_mask, start, size, asid); } } int sbi_hsm_hart_start(unsigned long hart, unsigned long start_addr, unsigned long priv) { struct sbi_ret ret; ret = SBI_CALL3(SBI_EXT_ID_HSM, SBI_HSM_HART_START, hart, start_addr, priv); return (ret.error != 0 ? (int)ret.error : 0); } void sbi_hsm_hart_stop(void) { (void)SBI_CALL0(SBI_EXT_ID_HSM, SBI_HSM_HART_STOP); } int sbi_hsm_hart_status(unsigned long hart) { struct sbi_ret ret; ret = SBI_CALL1(SBI_EXT_ID_HSM, SBI_HSM_HART_STATUS, hart); return (ret.error != 0 ? (int)ret.error : (int)ret.value); } void sbi_init(void) { struct sbi_ret sret; /* * Get the spec version. For legacy SBI implementations this will * return an error, otherwise it is guaranteed to succeed. */ sret = sbi_get_spec_version(); if (sret.error != 0) { /* We are running a legacy SBI implementation. */ sbi_spec_version = 0; return; } /* Set the SBI implementation info. */ sbi_spec_version = sret.value; sbi_impl_id = sbi_get_impl_id().value; sbi_impl_version = sbi_get_impl_version().value; /* Probe for legacy replacement extensions. */ if (sbi_probe_extension(SBI_EXT_ID_TIME) != 0) has_time_extension = true; if (sbi_probe_extension(SBI_EXT_ID_IPI) != 0) has_ipi_extension = true; if (sbi_probe_extension(SBI_EXT_ID_RFNC) != 0) has_rfnc_extension = true; }