/*
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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_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(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_PLATFORM_RESET_SHUTDOWN);
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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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