forked from Mirrors/opensbi
6c39ea99ee
OpenSBI should show error trace only if any valid SBI function does not perform as expected. However, OpenSBI should show notify the caller with a negative error if given SBI function ID is not valid. Signed-off-by: Atish Patra <atish.patra@wdc.com>
100 lines
2.2 KiB
C
100 lines
2.2 KiB
C
/*
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2019 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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*/
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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_ipi.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_trap.h>
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#define SBI_ECALL_VERSION_MAJOR 0
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#define SBI_ECALL_VERSION_MINOR 1
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u16 sbi_ecall_version_major(void)
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{
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return SBI_ECALL_VERSION_MAJOR;
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}
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u16 sbi_ecall_version_minor(void)
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{
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return SBI_ECALL_VERSION_MINOR;
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}
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int sbi_ecall_handler(u32 hartid, ulong mcause,
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struct sbi_trap_regs *regs,
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struct sbi_scratch *scratch)
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{
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int ret = SBI_ENOTSUPP;
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struct sbi_tlb_info tlb_info;
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switch (regs->a7) {
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case SBI_ECALL_SET_TIMER:
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#if __riscv_xlen == 32
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sbi_timer_event_start(scratch,
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(((u64)regs->a1 << 32) | (u64)regs->a0));
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#else
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sbi_timer_event_start(scratch, (u64)regs->a0);
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#endif
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ret = 0;
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break;
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case SBI_ECALL_CONSOLE_PUTCHAR:
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sbi_putc(regs->a0);
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ret = 0;
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break;
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case SBI_ECALL_CONSOLE_GETCHAR:
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regs->a0 = sbi_getc();
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ret = 0;
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break;
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case SBI_ECALL_CLEAR_IPI:
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sbi_ipi_clear_smode(scratch);
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ret = 0;
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break;
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case SBI_ECALL_SEND_IPI:
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ret = sbi_ipi_send_many(scratch, (ulong *)regs->a0,
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SBI_IPI_EVENT_SOFT, NULL);
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break;
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case SBI_ECALL_REMOTE_FENCE_I:
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ret = sbi_ipi_send_many(scratch, (ulong *)regs->a0,
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SBI_IPI_EVENT_FENCE_I, NULL);
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break;
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case SBI_ECALL_REMOTE_SFENCE_VMA:
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tlb_info.start = (unsigned long)regs->a1;
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tlb_info.size = (unsigned long)regs->a2;
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ret = sbi_ipi_send_many(scratch, (ulong *)regs->a0,
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SBI_IPI_EVENT_SFENCE_VMA, &tlb_info);
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break;
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case SBI_ECALL_REMOTE_SFENCE_VMA_ASID:
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tlb_info.start = (unsigned long)regs->a1;
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tlb_info.size = (unsigned long)regs->a2;
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tlb_info.asid = (unsigned long)regs->a3;
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ret = sbi_ipi_send_many(scratch, (ulong *)regs->a0,
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SBI_IPI_EVENT_SFENCE_VMA_ASID, &tlb_info);
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break;
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case SBI_ECALL_SHUTDOWN:
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sbi_system_shutdown(scratch, 0);
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ret = 0;
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break;
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default:
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regs->a0 = SBI_ENOTSUPP;
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ret = 0;
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break;
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};
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if (!ret) {
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regs->mepc += 4;
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}
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return ret;
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}
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