diff --git a/contrib/README.md b/contrib/README.md index 52abef9c65..1985b04269 100644 --- a/contrib/README.md +++ b/contrib/README.md @@ -52,6 +52,7 @@ Git log in order to find out version and update details | bsps/arm/stm32h7/cmsis-device-h7/ | https://github.com/STMicroelectronics/cmsis_device_h7.git | | bsps/arm/stm32h7/stm32h7xx_hal_driver | https://github.com/STMicroelectronics/stm32u5xx-hal-driver | | bsps/arm/stm32u5/stm32u5xx-hal-driver | https://github.com/STMicroelectronics/stm32h7xx_hal_driver.git | +| bsps/riscv/sbi | | https://cgit.freebsd.org/src/ | | cpukit/fastlz | https://github.com/ariya/FastLZ | | cpukit/utf8proc | https://juliastrings.github.io/utf8proc/releases/ | | cpukit/libz | https://github.com/madler/zlib | diff --git a/contrib/bsps/riscv/include/machine/sbi.h b/contrib/bsps/riscv/include/machine/sbi.h new file mode 100644 index 0000000000..7b103b2e0d --- /dev/null +++ b/contrib/bsps/riscv/include/machine/sbi.h @@ -0,0 +1,248 @@ +/*- + * Copyright (c) 2016-2017 Ruslan Bukin + * All rights reserved. + * Copyright (c) 2019 Mitchell Horne + * + * Portions of this software were developed by SRI International and the + * University of Cambridge Computer Laboratory under DARPA/AFRL contract + * FA8750-10-C-0237 ("CTSRD"), as part of the DARPA CRASH research programme. + * + * Portions of this software were developed by the University of Cambridge + * Computer Laboratory as part of the CTSRD Project, with support from the + * UK Higher Education Innovation Fund (HEIF). + * + * 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. + */ + +#ifndef _MACHINE_SBI_H_ +#define _MACHINE_SBI_H_ + +/* SBI Specification Version */ +#define SBI_SPEC_VERS_MAJOR_OFFSET 24 +#define SBI_SPEC_VERS_MAJOR_MASK (0x7F << SBI_SPEC_VERS_MAJOR_OFFSET) +#define SBI_SPEC_VERS_MINOR_OFFSET 0 +#define SBI_SPEC_VERS_MINOR_MASK (0xFFFFFF << SBI_SPEC_VERS_MINOR_OFFSET) + +/* SBI Implementation IDs */ +#define SBI_IMPL_ID_BBL 0 +#define SBI_IMPL_ID_OPENSBI 1 +#define SBI_IMPL_ID_XVISOR 2 +#define SBI_IMPL_ID_KVM 3 +#define SBI_IMPL_ID_RUSTSBI 4 +#define SBI_IMPL_ID_DIOSIX 5 +#define SBI_IMPL_ID_COFFER 6 +#define SBI_IMPL_ID_XEN_PROJECT 7 +#define SBI_IMPL_ID_POLARFIRE_HSS 8 +#define SBI_IMPL_ID_COREBOOT 9 +#define SBI_IMPL_ID_OREBOOT 10 +#define SBI_IMPL_ID_BHYVE 11 + +/* SBI Error Codes */ +#define SBI_SUCCESS 0 +#define SBI_ERR_FAILURE -1 +#define SBI_ERR_NOT_SUPPORTED -2 +#define SBI_ERR_INVALID_PARAM -3 +#define SBI_ERR_DENIED -4 +#define SBI_ERR_INVALID_ADDRESS -5 +#define SBI_ERR_ALREADY_AVAILABLE -6 + +/* SBI Base Extension */ +#define SBI_EXT_ID_BASE 0x10 +#define SBI_BASE_GET_SPEC_VERSION 0 +#define SBI_BASE_GET_IMPL_ID 1 +#define SBI_BASE_GET_IMPL_VERSION 2 +#define SBI_BASE_PROBE_EXTENSION 3 +#define SBI_BASE_GET_MVENDORID 4 +#define SBI_BASE_GET_MARCHID 5 +#define SBI_BASE_GET_MIMPID 6 + +/* Timer (TIME) Extension */ +#define SBI_EXT_ID_TIME 0x54494D45 +#define SBI_TIME_SET_TIMER 0 + +/* IPI (IPI) Extension */ +#define SBI_EXT_ID_IPI 0x735049 +#define SBI_IPI_SEND_IPI 0 + +/* RFENCE (RFNC) Extension */ +#define SBI_EXT_ID_RFNC 0x52464E43 +#define SBI_RFNC_REMOTE_FENCE_I 0 +#define SBI_RFNC_REMOTE_SFENCE_VMA 1 +#define SBI_RFNC_REMOTE_SFENCE_VMA_ASID 2 +#define SBI_RFNC_REMOTE_HFENCE_GVMA_VMID 3 +#define SBI_RFNC_REMOTE_HFENCE_GVMA 4 +#define SBI_RFNC_REMOTE_HFENCE_VVMA_ASID 5 +#define SBI_RFNC_REMOTE_HFENCE_VVMA 6 + +/* Hart State Management (HSM) Extension */ +#define SBI_EXT_ID_HSM 0x48534D +#define SBI_HSM_HART_START 0 +#define SBI_HSM_HART_STOP 1 +#define SBI_HSM_HART_STATUS 2 +#define SBI_HSM_STATUS_STARTED 0 +#define SBI_HSM_STATUS_STOPPED 1 +#define SBI_HSM_STATUS_START_PENDING 2 +#define SBI_HSM_STATUS_STOP_PENDING 3 + +/* System Reset (SRST) Extension */ +#define SBI_EXT_ID_SRST 0x53525354 +#define SBI_SRST_SYSTEM_RESET 0 +#define SBI_SRST_TYPE_SHUTDOWN 0 +#define SBI_SRST_TYPE_COLD_REBOOT 1 +#define SBI_SRST_TYPE_WARM_REBOOT 2 +#define SBI_SRST_REASON_NONE 0 +#define SBI_SRST_REASON_SYSTEM_FAILURE 1 + +/* Legacy Extensions */ +#define SBI_SET_TIMER 0 +#define SBI_CONSOLE_PUTCHAR 1 +#define SBI_CONSOLE_GETCHAR 2 +#define SBI_CLEAR_IPI 3 +#define SBI_SEND_IPI 4 +#define SBI_REMOTE_FENCE_I 5 +#define SBI_REMOTE_SFENCE_VMA 6 +#define SBI_REMOTE_SFENCE_VMA_ASID 7 +#define SBI_SHUTDOWN 8 + +#ifndef LOCORE + +#define SBI_CALL0(e, f) SBI_CALL5(e, f, 0, 0, 0, 0, 0) +#define SBI_CALL1(e, f, p1) SBI_CALL5(e, f, p1, 0, 0, 0, 0) +#define SBI_CALL2(e, f, p1, p2) SBI_CALL5(e, f, p1, p2, 0, 0, 0) +#define SBI_CALL3(e, f, p1, p2, p3) SBI_CALL5(e, f, p1, p2, p3, 0, 0) +#define SBI_CALL4(e, f, p1, p2, p3, p4) SBI_CALL5(e, f, p1, p2, p3, p4, 0) +#define SBI_CALL5(e, f, p1, p2, p3, p4, p5) sbi_call(e, f, p1, p2, p3, p4, p5) + +/* + * Documentation available at + * https://github.com/riscv/riscv-sbi-doc/blob/master/riscv-sbi.adoc + */ + +struct sbi_ret { + long error; + long value; +}; + +static __inline struct sbi_ret +sbi_call(uint64_t arg7, uint64_t arg6, uint64_t arg0, uint64_t arg1, + uint64_t arg2, uint64_t arg3, uint64_t arg4) +{ + struct sbi_ret ret; + + register uintptr_t a0 __asm ("a0") = (uintptr_t)(arg0); + register uintptr_t a1 __asm ("a1") = (uintptr_t)(arg1); + register uintptr_t a2 __asm ("a2") = (uintptr_t)(arg2); + register uintptr_t a3 __asm ("a3") = (uintptr_t)(arg3); + register uintptr_t a4 __asm ("a4") = (uintptr_t)(arg4); + register uintptr_t a6 __asm ("a6") = (uintptr_t)(arg6); + register uintptr_t a7 __asm ("a7") = (uintptr_t)(arg7); + + __asm __volatile( \ + "ecall" \ + :"+r"(a0), "+r"(a1) \ + :"r"(a2), "r"(a3), "r"(a4), "r"(a6), "r"(a7) \ + :"memory"); + + ret.error = a0; + ret.value = a1; + return (ret); +} + +/* Base extension functions. */ +static __inline long +sbi_probe_extension(long id) +{ + return (SBI_CALL1(SBI_EXT_ID_BASE, SBI_BASE_PROBE_EXTENSION, id).value); +} + +/* TIME extension functions. */ +void sbi_set_timer(uint64_t val); + +/* IPI extension functions. */ +void sbi_send_ipi(const u_long *hart_mask); + +/* RFENCE extension functions. */ +void sbi_remote_fence_i(const u_long *hart_mask); +void sbi_remote_sfence_vma(const u_long *hart_mask, u_long start, u_long size); +void sbi_remote_sfence_vma_asid(const u_long *hart_mask, u_long start, + u_long size, u_long asid); + +/* Hart State Management extension functions. */ + +/* + * Start execution on the specified hart at physical address start_addr. The + * register a0 will contain the hart's ID, and a1 will contain the value of + * priv. + */ +int sbi_hsm_hart_start(u_long hart, u_long start_addr, u_long priv); + +/* + * Stop execution on the current hart. Interrupts should be disabled, or this + * function may return. + */ +void sbi_hsm_hart_stop(void); + +/* + * Get the execution status of the specified hart. The status will be one of: + * - SBI_HSM_STATUS_STARTED + * - SBI_HSM_STATUS_STOPPED + * - SBI_HSM_STATUS_START_PENDING + * - SBI_HSM_STATUS_STOP_PENDING + */ +int sbi_hsm_hart_status(u_long hart); + +/* System Reset extension functions. */ + +/* + * Reset the system based on the following 'type' and 'reason' chosen from: + * - SBI_SRST_TYPE_SHUTDOWN + * - SBI_SRST_TYPE_COLD_REBOOT + * - SBI_SRST_TYPE_WARM_REBOOT + * - SBI_SRST_REASON_NONE + * - SBI_SRST_REASON_SYSTEM_FAILURE + */ +void sbi_system_reset(u_long reset_type, u_long reset_reason); + +/* Legacy extension functions. */ +static __inline void +sbi_console_putchar(int ch) +{ + + (void)SBI_CALL1(SBI_CONSOLE_PUTCHAR, 0, ch); +} + +static __inline int +sbi_console_getchar(void) +{ + + /* + * XXX: The "error" is returned here because legacy SBI functions + * continue to return their value in a0. + */ + return (SBI_CALL0(SBI_CONSOLE_GETCHAR, 0).error); +} + +void sbi_print_version(void); +void sbi_init(void); + +#endif /* !LOCORE */ +#endif /* !_MACHINE_SBI_H_ */ diff --git a/contrib/bsps/riscv/sbi/sbi.c b/contrib/bsps/riscv/sbi/sbi.c new file mode 100644 index 0000000000..2d8e96a22b --- /dev/null +++ b/contrib/bsps/riscv/sbi/sbi.c @@ -0,0 +1,437 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright (c) 2019 Mitchell Horne + * Copyright (c) 2021 Jessica Clarke + * + * 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 +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +/* SBI Implementation-Specific Definitions */ +#define OPENSBI_VERSION_MAJOR_OFFSET 16 +#define OPENSBI_VERSION_MINOR_MASK 0xFFFF + +struct sbi_softc { + device_t dev; +}; + +struct sbi_devinfo { + struct resource_list rl; +}; + +static struct sbi_softc *sbi_softc = NULL; + +static u_long sbi_spec_version; +static u_long sbi_impl_id; +static u_long sbi_impl_version; + +static bool has_time_extension = false; +static bool has_ipi_extension = false; +static bool has_rfnc_extension = false; +static bool has_srst_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)); +} + +static struct sbi_ret +sbi_get_mvendorid(void) +{ + return (SBI_CALL0(SBI_EXT_ID_BASE, SBI_BASE_GET_MVENDORID)); +} + +static struct sbi_ret +sbi_get_marchid(void) +{ + return (SBI_CALL0(SBI_EXT_ID_BASE, SBI_BASE_GET_MARCHID)); +} + +static struct sbi_ret +sbi_get_mimpid(void) +{ + return (SBI_CALL0(SBI_EXT_ID_BASE, SBI_BASE_GET_MIMPID)); +} + +static void +sbi_shutdown_final(void *dummy __unused, int howto) +{ + if ((howto & RB_POWEROFF) != 0) + sbi_system_reset(SBI_SRST_TYPE_SHUTDOWN, SBI_SRST_REASON_NONE); +} + +void +sbi_system_reset(u_long reset_type, u_long reset_reason) +{ + /* Use the SRST extension, if available. */ + if (has_srst_extension) { + (void)SBI_CALL2(SBI_EXT_ID_SRST, SBI_SRST_SYSTEM_RESET, + reset_type, reset_reason); + } + (void)SBI_CALL0(SBI_SHUTDOWN, 0); +} + +void +sbi_print_version(void) +{ + u_int major; + u_int minor; + + /* For legacy SBI implementations. */ + if (sbi_spec_version == 0) { + printf("SBI: Unknown (Legacy) Implementation\n"); + printf("SBI Specification Version: 0.1\n"); + return; + } + + switch (sbi_impl_id) { + case (SBI_IMPL_ID_BBL): + printf("SBI: Berkely Boot Loader %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; + printf("SBI: OpenSBI v%u.%u\n", major, minor); + break; + case (SBI_IMPL_ID_XVISOR): + printf("SBI: eXtensible Versatile hypervISOR %lu\n", + sbi_impl_version); + break; + case (SBI_IMPL_ID_KVM): + printf("SBI: Kernel-based Virtual Machine %lu\n", + sbi_impl_version); + break; + case (SBI_IMPL_ID_RUSTSBI): + printf("SBI: RustSBI %lu\n", sbi_impl_version); + break; + case (SBI_IMPL_ID_DIOSIX): + printf("SBI: Diosix %lu\n", sbi_impl_version); + break; + case (SBI_IMPL_ID_COFFER): + printf("SBI: Coffer %lu\n", sbi_impl_version); + break; + case (SBI_IMPL_ID_XEN_PROJECT): + printf("SBI: Xen Project %lu\n", sbi_impl_version); + break; + case (SBI_IMPL_ID_POLARFIRE_HSS): + printf("SBI: PolarFire Hart Software Services %lu\n", + sbi_impl_version); + break; + case (SBI_IMPL_ID_COREBOOT): + printf("SBI: coreboot %lu\n", sbi_impl_version); + break; + case (SBI_IMPL_ID_OREBOOT): + printf("SBI: oreboot %lu\n", sbi_impl_version); + break; + case (SBI_IMPL_ID_BHYVE): + printf("SBI: bhyve %lu\n", sbi_impl_version); + break; + default: + printf("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); + printf("SBI Specification Version: %u.%u\n", major, minor); +} + +void +sbi_set_timer(uint64_t val) +{ + struct sbi_ret ret __diagused; + + /* Use the TIME legacy replacement extension, if available. */ + if (has_time_extension) { + ret = SBI_CALL1(SBI_EXT_ID_TIME, SBI_TIME_SET_TIMER, val); + MPASS(ret.error == SBI_SUCCESS); + } else { + (void)SBI_CALL1(SBI_SET_TIMER, 0, val); + } +} + +void +sbi_send_ipi(const u_long *hart_mask) +{ + struct sbi_ret ret __diagused; + + /* 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); + MPASS(ret.error == SBI_SUCCESS); + } else { + (void)SBI_CALL1(SBI_SEND_IPI, 0, (uint64_t)hart_mask); + } +} + +void +sbi_remote_fence_i(const u_long *hart_mask) +{ + struct sbi_ret ret __diagused; + + /* 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); + MPASS(ret.error == SBI_SUCCESS); + } else { + (void)SBI_CALL1(SBI_REMOTE_FENCE_I, 0, (uint64_t)hart_mask); + } +} + +void +sbi_remote_sfence_vma(const u_long *hart_mask, u_long start, u_long size) +{ + struct sbi_ret ret __diagused; + + /* 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); + MPASS(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 u_long *hart_mask, u_long start, u_long size, + u_long asid) +{ + struct sbi_ret ret __diagused; + + /* 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); + MPASS(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(u_long hart, u_long start_addr, u_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(u_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; + + /* Set the hardware implementation info. */ + mvendorid = sbi_get_mvendorid().value; + marchid = sbi_get_marchid().value; + mimpid = sbi_get_mimpid().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; + if (sbi_probe_extension(SBI_EXT_ID_SRST) != 0) + has_srst_extension = true; + + /* + * Probe for legacy extensions. We still rely on many of them to be + * implemented, but this is not guaranteed by the spec. + */ + KASSERT(has_time_extension || sbi_probe_extension(SBI_SET_TIMER) != 0, + ("SBI doesn't implement sbi_set_timer()")); + KASSERT(sbi_probe_extension(SBI_CONSOLE_PUTCHAR) != 0, + ("SBI doesn't implement sbi_console_putchar()")); + KASSERT(sbi_probe_extension(SBI_CONSOLE_GETCHAR) != 0, + ("SBI doesn't implement sbi_console_getchar()")); + KASSERT(has_ipi_extension || sbi_probe_extension(SBI_SEND_IPI) != 0, + ("SBI doesn't implement sbi_send_ipi()")); + KASSERT(has_rfnc_extension || + sbi_probe_extension(SBI_REMOTE_FENCE_I) != 0, + ("SBI doesn't implement sbi_remote_fence_i()")); + KASSERT(has_rfnc_extension || + sbi_probe_extension(SBI_REMOTE_SFENCE_VMA) != 0, + ("SBI doesn't implement sbi_remote_sfence_vma()")); + KASSERT(has_rfnc_extension || + sbi_probe_extension(SBI_REMOTE_SFENCE_VMA_ASID) != 0, + ("SBI doesn't implement sbi_remote_sfence_vma_asid()")); + KASSERT(has_srst_extension || sbi_probe_extension(SBI_SHUTDOWN) != 0, + ("SBI doesn't implement a shutdown or reset extension")); +} + +static void +sbi_identify(driver_t *driver, device_t parent) +{ + device_t dev; + + if (device_find_child(parent, "sbi", DEVICE_UNIT_ANY) != NULL) + return; + + dev = BUS_ADD_CHILD(parent, 0, "sbi", DEVICE_UNIT_ANY); + if (dev == NULL) + device_printf(parent, "Can't add sbi child\n"); +} + +static int +sbi_probe(device_t dev) +{ + device_set_desc(dev, "RISC-V Supervisor Binary Interface"); + + return (BUS_PROBE_NOWILDCARD); +} + +static int +sbi_attach(device_t dev) +{ + struct sbi_softc *sc; +#ifdef SMP + device_t child; + struct sbi_devinfo *di; +#endif + + if (sbi_softc != NULL) + return (ENXIO); + + sc = device_get_softc(dev); + sc->dev = dev; + sbi_softc = sc; + + EVENTHANDLER_REGISTER(shutdown_final, sbi_shutdown_final, NULL, + SHUTDOWN_PRI_LAST); + +#ifdef SMP + di = malloc(sizeof(*di), M_DEVBUF, M_WAITOK | M_ZERO); + resource_list_init(&di->rl); + child = device_add_child(dev, "sbi_ipi", DEVICE_UNIT_ANY); + if (child == NULL) { + device_printf(dev, "Could not add sbi_ipi child\n"); + return (ENXIO); + } + + device_set_ivars(child, di); +#endif + + return (0); +} + +static struct resource_list * +sbi_get_resource_list(device_t bus, device_t child) +{ + struct sbi_devinfo *di; + + di = device_get_ivars(child); + KASSERT(di != NULL, ("%s: No devinfo", __func__)); + + return (&di->rl); +} + +static device_method_t sbi_methods[] = { + /* Device interface */ + DEVMETHOD(device_identify, sbi_identify), + DEVMETHOD(device_probe, sbi_probe), + DEVMETHOD(device_attach, sbi_attach), + + /* Bus interface */ + DEVMETHOD(bus_alloc_resource, bus_generic_rl_alloc_resource), + DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), + DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), + DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource), + DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), + DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), + DEVMETHOD(bus_get_resource_list, sbi_get_resource_list), + DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), + DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), + + DEVMETHOD_END +}; + +DEFINE_CLASS_0(sbi, sbi_driver, sbi_methods, sizeof(struct sbi_softc)); +EARLY_DRIVER_MODULE(sbi, nexus, sbi_driver, 0, 0, + BUS_PASS_CPU + BUS_PASS_ORDER_FIRST);