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Initial commit.

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Signed-off-by: Anup Patel <anup.patel@wdc.com>
This commit is contained in:
Anup Patel
2018-12-11 19:24:06 +05:30
committed by Anup Patel
commit 9e8ff05cb6
67 changed files with 6084 additions and 0 deletions
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98
lib/sbi_ecall.c Normal file
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/*
* Copyright (c) 2018 Western Digital Corporation or its affiliates.
*
* Authors:
* Anup Patel <anup.patel@wdc.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <sbi/sbi_console.h>
#include <sbi/sbi_ecall.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
#define SBI_ECALL_SET_TIMER 0
#define SBI_ECALL_CONSOLE_PUTCHAR 1
#define SBI_ECALL_CONSOLE_GETCHAR 2
#define SBI_ECALL_CLEAR_IPI 3
#define SBI_ECALL_SEND_IPI 4
#define SBI_ECALL_REMOTE_FENCE_I 5
#define SBI_ECALL_REMOTE_SFENCE_VMA 6
#define SBI_ECALL_REMOTE_SFENCE_VMA_ASID 7
#define SBI_ECALL_SHUTDOWN 8
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;
switch (regs->a7) {
case SBI_ECALL_SET_TIMER:
#if __riscv_xlen == 32
sbi_timer_event_start(scratch, hartid,
(((u64)regs->a1 << 32) || (u64)regs->a0));
#else
sbi_timer_event_start(scratch, hartid, (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, hartid);
ret = 0;
break;
case SBI_ECALL_SEND_IPI:
ret = sbi_ipi_send_many(scratch, hartid,
(ulong *)regs->a0,
SBI_IPI_EVENT_SOFT);
break;
case SBI_ECALL_REMOTE_FENCE_I:
ret = sbi_ipi_send_many(scratch, hartid,
(ulong *)regs->a0,
SBI_IPI_EVENT_FENCE_I);
break;
case SBI_ECALL_REMOTE_SFENCE_VMA:
case SBI_ECALL_REMOTE_SFENCE_VMA_ASID:
ret = sbi_ipi_send_many(scratch, hartid,
(ulong *)regs->a0,
SBI_IPI_EVENT_SFENCE_VMA);
break;
case SBI_ECALL_SHUTDOWN:
sbi_system_shutdown(scratch, 0);
ret = 0;
break;
default:
break;
};
if (!ret) {
regs->mepc += 4;
}
return ret;
}