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| author | Atish Patra <atish.patra@wdc.com> | 2019-06-19 00:54:01 +0300 |
|---|---|---|
| committer | Anup Patel <anup.patel@wdc.com> | 2019-06-19 07:18:51 +0300 |
| commit | 749b0b093242a4c27f7c4f66121afd7852b2de48 (patch) | |
| tree | 90c46fe6e750ddf08dd57347ddd498571792353a /lib/sbi/sbi_ecall.c | |
| parent | a5b37bd7d275fc65d8fd0b19bd3a08edfe4e6096 (diff) | |
| download | opensbi-749b0b093242a4c27f7c4f66121afd7852b2de48.tar.xz | |
lib: Move sbi core library to lib/sbi
Signed-off-by: Atish Patra <atish.patra@wdc.com>
Acked-by: Anup Patel <anup.patel@wdc.com>
Diffstat (limited to 'lib/sbi/sbi_ecall.c')
| -rw-r--r-- | lib/sbi/sbi_ecall.c | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/lib/sbi/sbi_ecall.c b/lib/sbi/sbi_ecall.c new file mode 100644 index 0000000..50c05d6 --- /dev/null +++ b/lib/sbi/sbi_ecall.c @@ -0,0 +1,107 @@ +/* + * 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_tlb.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 unpriv_trap uptrap; + 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, &uptrap, (ulong *)regs->a0, + SBI_IPI_EVENT_SOFT, NULL); + break; + case SBI_ECALL_REMOTE_FENCE_I: + ret = sbi_ipi_send_many(scratch, &uptrap, (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, &uptrap, (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, &uptrap, (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; + } else if (ret == SBI_ETRAP) { + ret = 0; + sbi_trap_redirect(regs, scratch, regs->mepc, + uptrap.cause, uptrap.tval); + } + + return ret; +} |