forked from Mirrors/opensbi
5c429ae213
To implement the SBI SRST extension, we need two platform operations for system reset: 1) system_reset_check() - This operation will check whether given reset type and reason are supported by the platform 2) system_reset() - This operation will do the actual platform system reset and it will not return if reset type and reason are supported by the platform This patch updates system reset related code everywhere as-per above. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Atish Patra <atish.patra@wdc.com>
121 lines
3.0 KiB
C
121 lines
3.0 KiB
C
/*
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2020 Western Digital Corporation or its affiliates.
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*
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* Authors:
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* Anup Patel <anup.patel@wdc.com>
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* Atish Patra <atish.patra@wdc.com>
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*/
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#include <sbi/riscv_asm.h>
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#include <sbi/sbi_console.h>
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#include <sbi/sbi_domain.h>
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#include <sbi/sbi_ecall.h>
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#include <sbi/sbi_ecall_interface.h>
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#include <sbi/sbi_error.h>
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#include <sbi/sbi_hsm.h>
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#include <sbi/sbi_ipi.h>
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#include <sbi/sbi_platform.h>
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#include <sbi/sbi_system.h>
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#include <sbi/sbi_timer.h>
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#include <sbi/sbi_tlb.h>
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#include <sbi/sbi_trap.h>
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#include <sbi/sbi_unpriv.h>
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#include <sbi/sbi_hart.h>
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static int sbi_load_hart_mask_unpriv(ulong *pmask, ulong *hmask,
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struct sbi_trap_info *uptrap)
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{
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ulong mask = 0;
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if (pmask) {
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mask = sbi_load_ulong(pmask, uptrap);
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if (uptrap->cause)
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return SBI_ETRAP;
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} else {
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sbi_hsm_hart_started_mask(sbi_domain_thishart_ptr(),
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0, &mask);
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}
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*hmask = mask;
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return 0;
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}
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static int sbi_ecall_legacy_handler(unsigned long extid, unsigned long funcid,
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unsigned long *args, unsigned long *out_val,
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struct sbi_trap_info *out_trap)
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{
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int ret = 0;
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struct sbi_tlb_info tlb_info;
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u32 source_hart = current_hartid();
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ulong hmask = 0;
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switch (extid) {
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case SBI_EXT_0_1_SET_TIMER:
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#if __riscv_xlen == 32
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sbi_timer_event_start((((u64)args[1] << 32) | (u64)args[0]));
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#else
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sbi_timer_event_start((u64)args[0]);
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#endif
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break;
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case SBI_EXT_0_1_CONSOLE_PUTCHAR:
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sbi_putc(args[0]);
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break;
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case SBI_EXT_0_1_CONSOLE_GETCHAR:
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ret = sbi_getc();
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break;
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case SBI_EXT_0_1_CLEAR_IPI:
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sbi_ipi_clear_smode();
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break;
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case SBI_EXT_0_1_SEND_IPI:
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ret = sbi_load_hart_mask_unpriv((ulong *)args[0],
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&hmask, out_trap);
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if (ret != SBI_ETRAP)
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ret = sbi_ipi_send_smode(hmask, 0);
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break;
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case SBI_EXT_0_1_REMOTE_FENCE_I:
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ret = sbi_load_hart_mask_unpriv((ulong *)args[0],
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&hmask, out_trap);
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if (ret != SBI_ETRAP) {
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SBI_TLB_INFO_INIT(&tlb_info, 0, 0, 0, 0,
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SBI_ITLB_FLUSH, source_hart);
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ret = sbi_tlb_request(hmask, 0, &tlb_info);
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}
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break;
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case SBI_EXT_0_1_REMOTE_SFENCE_VMA:
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ret = sbi_load_hart_mask_unpriv((ulong *)args[0],
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&hmask, out_trap);
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if (ret != SBI_ETRAP) {
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SBI_TLB_INFO_INIT(&tlb_info, args[1], args[2], 0, 0,
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SBI_TLB_FLUSH_VMA, source_hart);
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ret = sbi_tlb_request(hmask, 0, &tlb_info);
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}
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break;
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case SBI_EXT_0_1_REMOTE_SFENCE_VMA_ASID:
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ret = sbi_load_hart_mask_unpriv((ulong *)args[0],
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&hmask, out_trap);
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if (ret != SBI_ETRAP) {
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SBI_TLB_INFO_INIT(&tlb_info, args[1], args[2], args[3],
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0, SBI_TLB_FLUSH_VMA_ASID,
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source_hart);
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ret = sbi_tlb_request(hmask, 0, &tlb_info);
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}
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break;
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case SBI_EXT_0_1_SHUTDOWN:
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sbi_system_reset(SBI_SRST_RESET_TYPE_SHUTDOWN,
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SBI_SRST_RESET_REASON_NONE);
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break;
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default:
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ret = SBI_ENOTSUPP;
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};
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return ret;
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}
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struct sbi_ecall_extension ecall_legacy = {
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.extid_start = SBI_EXT_0_1_SET_TIMER,
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.extid_end = SBI_EXT_0_1_SHUTDOWN,
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.handle = sbi_ecall_legacy_handler,
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};
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