mirror of
https://github.com/riscv-software-src/opensbi.git
synced 2025-08-24 23:41:23 +01:00
c3e31cbf36
When a probe implementation just returns zero for not available and one for available then we don't need it, as the extension won't be registered at all if it would return zero and the Base extension probe function will already set out_val to 1 if not probe function is implemented. Currently all probe functions only return zero or one, so remove them all. Signed-off-by: Andrew Jones <ajones@ventanamicro.com> Reviewed-by: Anup Patel <anup@brainfault.org>
84 lines
1.8 KiB
C
84 lines
1.8 KiB
C
/*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*
|
|
* Copyright (c) 2020 Western Digital Corporation or its affiliates.
|
|
*
|
|
* Authors:
|
|
* Anup Patel <anup.patel@wdc.com>
|
|
* Atish Patra <atish.patra@wdc.com>
|
|
*/
|
|
|
|
#include <sbi/sbi_error.h>
|
|
#include <sbi/sbi_ecall.h>
|
|
#include <sbi/sbi_ecall_interface.h>
|
|
#include <sbi/sbi_trap.h>
|
|
#include <sbi/sbi_system.h>
|
|
|
|
static int sbi_ecall_srst_handler(unsigned long extid, unsigned long funcid,
|
|
const struct sbi_trap_regs *regs,
|
|
unsigned long *out_val,
|
|
struct sbi_trap_info *out_trap)
|
|
{
|
|
if (funcid == SBI_EXT_SRST_RESET) {
|
|
if ((((u32)-1U) <= ((u64)regs->a0)) ||
|
|
(((u32)-1U) <= ((u64)regs->a1)))
|
|
return SBI_EINVAL;
|
|
|
|
switch (regs->a0) {
|
|
case SBI_SRST_RESET_TYPE_SHUTDOWN:
|
|
case SBI_SRST_RESET_TYPE_COLD_REBOOT:
|
|
case SBI_SRST_RESET_TYPE_WARM_REBOOT:
|
|
break;
|
|
default:
|
|
return SBI_EINVAL;
|
|
}
|
|
|
|
switch (regs->a1) {
|
|
case SBI_SRST_RESET_REASON_NONE:
|
|
case SBI_SRST_RESET_REASON_SYSFAIL:
|
|
break;
|
|
default:
|
|
return SBI_EINVAL;
|
|
}
|
|
|
|
if (sbi_system_reset_supported(regs->a0, regs->a1))
|
|
sbi_system_reset(regs->a0, regs->a1);
|
|
}
|
|
|
|
return SBI_ENOTSUPP;
|
|
}
|
|
|
|
static bool srst_available(void)
|
|
{
|
|
u32 type;
|
|
|
|
/*
|
|
* At least one standard reset types should be supported by
|
|
* the platform for SBI SRST extension to be usable.
|
|
*/
|
|
for (type = 0; type <= SBI_SRST_RESET_TYPE_LAST; type++) {
|
|
if (sbi_system_reset_supported(type,
|
|
SBI_SRST_RESET_REASON_NONE))
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
struct sbi_ecall_extension ecall_srst;
|
|
|
|
static int sbi_ecall_srst_register_extensions(void)
|
|
{
|
|
if (!srst_available())
|
|
return 0;
|
|
|
|
return sbi_ecall_register_extension(&ecall_srst);
|
|
}
|
|
|
|
struct sbi_ecall_extension ecall_srst = {
|
|
.extid_start = SBI_EXT_SRST,
|
|
.extid_end = SBI_EXT_SRST,
|
|
.register_extensions = sbi_ecall_srst_register_extensions,
|
|
.handle = sbi_ecall_srst_handler,
|
|
};
|