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- /*
- * SPDX-License-Identifier: BSD-2-Clause
- *
- * Copyright (c) 2019 Western Digital Corporation or its affiliates.
- *
- * Authors:
- * Anup Patel <anup.patel@wdc.com>
- */
- #include <sbi/sbi_console.h>
- #include <sbi/sbi_ecall.h>
- #include <sbi/sbi_ecall_interface.h>
- #include <sbi/sbi_error.h>
- #include <sbi/sbi_ipi.h>
- #include <sbi/sbi_system.h>
- #include <sbi/sbi_timer.h>
- #include <sbi/sbi_trap.h>
- #define SBI_ECALL_VERSION_MAJOR 0
- #define SBI_ECALL_VERSION_MINOR 1
- u16 sbi_ecall_version_major(void)
- {
- return SBI_ECALL_VERSION_MAJOR;
- }
- u16 sbi_ecall_version_minor(void)
- {
- return SBI_ECALL_VERSION_MINOR;
- }
- int sbi_ecall_handler(u32 hartid, ulong mcause,
- struct sbi_trap_regs *regs,
- struct sbi_scratch *scratch)
- {
- int ret = SBI_ENOTSUPP;
- struct sbi_tlb_info tlb_info;
- switch (regs->a7) {
- case SBI_ECALL_SET_TIMER:
- #if __riscv_xlen == 32
- sbi_timer_event_start(scratch,
- (((u64)regs->a1 << 32) | (u64)regs->a0));
- #else
- sbi_timer_event_start(scratch, (u64)regs->a0);
- #endif
- ret = 0;
- break;
- case SBI_ECALL_CONSOLE_PUTCHAR:
- sbi_putc(regs->a0);
- ret = 0;
- break;
- case SBI_ECALL_CONSOLE_GETCHAR:
- regs->a0 = sbi_getc();
- ret = 0;
- break;
- case SBI_ECALL_CLEAR_IPI:
- sbi_ipi_clear_smode(scratch);
- ret = 0;
- break;
- case SBI_ECALL_SEND_IPI:
- ret = sbi_ipi_send_many(scratch, (ulong *)regs->a0,
- SBI_IPI_EVENT_SOFT, NULL);
- break;
- case SBI_ECALL_REMOTE_FENCE_I:
- ret = sbi_ipi_send_many(scratch, (ulong *)regs->a0,
- SBI_IPI_EVENT_FENCE_I, NULL);
- break;
- case SBI_ECALL_REMOTE_SFENCE_VMA:
- tlb_info.start = (unsigned long)regs->a1;
- tlb_info.size = (unsigned long)regs->a2;
- tlb_info.type = SBI_TLB_FLUSH_VMA;
- ret = sbi_ipi_send_many(scratch, (ulong *)regs->a0,
- SBI_IPI_EVENT_SFENCE_VMA, &tlb_info);
- break;
- case SBI_ECALL_REMOTE_SFENCE_VMA_ASID:
- tlb_info.start = (unsigned long)regs->a1;
- tlb_info.size = (unsigned long)regs->a2;
- tlb_info.asid = (unsigned long)regs->a3;
- tlb_info.type = SBI_TLB_FLUSH_VMA_ASID;
- ret = sbi_ipi_send_many(scratch, (ulong *)regs->a0,
- SBI_IPI_EVENT_SFENCE_VMA_ASID, &tlb_info);
- break;
- case SBI_ECALL_SHUTDOWN:
- sbi_system_shutdown(scratch, 0);
- ret = 0;
- break;
- default:
- regs->a0 = SBI_ENOTSUPP;
- ret = 0;
- break;
- };
- if (!ret) {
- regs->mepc += 4;
- }
- return ret;
- }
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