* arch/risc-v/include/syscall.h
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
* through include/syscall.h or include/sys/sycall.h
*/
#ifndef __ARCH_RISCV_INCLUDE_SYSCALL_H
#define __ARCH_RISCV_INCLUDE_SYSCALL_H
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#ifndef __ASSEMBLY__
# include <stdint.h>
#endif
* Pre-processor Definitions
****************************************************************************/
#define SYS_syscall 0x00
* for the syscall return. So a minimum of four syscall values must be
* reserved. If CONFIG_BUILD_FLAT isn't defined, then four more syscall
* values must be reserved.
*/
#ifndef CONFIG_BUILD_FLAT
# define CONFIG_SYS_RESERVED 6
#else
# define CONFIG_SYS_RESERVED 4
#endif
* arch/risc-v/include/syscall.h). In addition, SYS call 3 is the
* return from a SYS call in kernel mode. The first four syscall values must,
* therefore, be reserved (0 is not used).
*/
*
* void riscv_fullcontextrestore() noreturn_function;
*/
#define SYS_restore_context (1)
*
* void riscv_switchcontext();
*/
#define SYS_switch_context (2)
*
* void _assert(const char *filename, int linenum, const char *msg);
*/
#define SYS_assert_handler (3)
#ifndef CONFIG_BUILD_FLAT
*
* void signal_handler(_sa_sigaction_t sighand, int signo,
* siginfo_t *info, void *ucontext);
*/
#define SYS_signal_handler (4)
*
* void signal_handler_return(void);
*/
#define SYS_signal_handler_return (5)
#endif
* Public Types
****************************************************************************/
* Inline functions
****************************************************************************/
#ifndef __ASSEMBLY__
* Public Data
****************************************************************************/
* Public Function Prototypes
****************************************************************************/
#ifdef __cplusplus
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif
long smh_call(unsigned int nbr, void *parm);
#if defined(CONFIG_ARCH_USE_S_MODE) && defined(__KERNEL__)
uintptr_t sys_call0(unsigned int nbr);
uintptr_t sys_call1(unsigned int nbr, uintptr_t parm1);
uintptr_t sys_call2(unsigned int nbr, uintptr_t parm1, uintptr_t parm2);
uintptr_t sys_call3(unsigned int nbr, uintptr_t parm1, uintptr_t parm2,
uintptr_t parm3);
uintptr_t sys_call4(unsigned int nbr, uintptr_t parm1, uintptr_t parm2,
uintptr_t parm3, uintptr_t parm4);
uintptr_t sys_call5(unsigned int nbr, uintptr_t parm1, uintptr_t parm2,
uintptr_t parm3, uintptr_t parm4, uintptr_t parm5);
uintptr_t sys_call6(unsigned int nbr, uintptr_t parm1, uintptr_t parm2,
uintptr_t parm3, uintptr_t parm4, uintptr_t parm5,
uintptr_t parm6);
#else
* Name: sys_call0
*
* Description:
* System call SYS_ argument and no additional parameters.
*
****************************************************************************/
static inline uintptr_t sys_call0(unsigned int nbr)
{
register long r0 asm("a0") = (long)(nbr);
asm volatile
(
"ecall"
:: "r"(r0)
: "memory"
);
asm volatile("nop" : "=r"(r0));
return r0;
}
* Name: sys_call1
*
* Description:
* System call SYS_ argument and one additional parameter.
*
****************************************************************************/
static inline uintptr_t sys_call1(unsigned int nbr, uintptr_t parm1)
{
register long r0 asm("a0") = (long)(nbr);
register long r1 asm("a1") = (long)(parm1);
asm volatile
(
"ecall"
:: "r"(r0), "r"(r1)
: "memory"
);
asm volatile("nop" : "=r"(r0));
return r0;
}
* Name: sys_call2
*
* Description:
* System call SYS_ argument and two additional parameters.
*
****************************************************************************/
static inline uintptr_t sys_call2(unsigned int nbr, uintptr_t parm1,
uintptr_t parm2)
{
register long r0 asm("a0") = (long)(nbr);
register long r1 asm("a1") = (long)(parm1);
register long r2 asm("a2") = (long)(parm2);
asm volatile
(
"ecall"
:: "r"(r0), "r"(r1), "r"(r2)
: "memory"
);
asm volatile("nop" : "=r"(r0));
return r0;
}
* Name: sys_call3
*
* Description:
* System call SYS_ argument and three additional parameters.
*
****************************************************************************/
static inline uintptr_t sys_call3(unsigned int nbr, uintptr_t parm1,
uintptr_t parm2, uintptr_t parm3)
{
register long r0 asm("a0") = (long)(nbr);
register long r1 asm("a1") = (long)(parm1);
register long r2 asm("a2") = (long)(parm2);
register long r3 asm("a3") = (long)(parm3);
asm volatile
(
"ecall"
:: "r"(r0), "r"(r1), "r"(r2), "r"(r3)
: "memory"
);
asm volatile("nop" : "=r"(r0));
return r0;
}
* Name: sys_call4
*
* Description:
* System call SYS_ argument and four additional parameters.
*
****************************************************************************/
static inline uintptr_t sys_call4(unsigned int nbr, uintptr_t parm1,
uintptr_t parm2, uintptr_t parm3,
uintptr_t parm4)
{
register long r0 asm("a0") = (long)(nbr);
register long r1 asm("a1") = (long)(parm1);
register long r2 asm("a2") = (long)(parm2);
register long r3 asm("a3") = (long)(parm3);
register long r4 asm("a4") = (long)(parm4);
asm volatile
(
"ecall"
:: "r"(r0), "r"(r1), "r"(r2), "r"(r3), "r"(r4)
: "memory"
);
asm volatile("nop" : "=r"(r0));
return r0;
}
* Name: sys_call5
*
* Description:
* System call SYS_ argument and five additional parameters.
*
****************************************************************************/
static inline uintptr_t sys_call5(unsigned int nbr, uintptr_t parm1,
uintptr_t parm2, uintptr_t parm3,
uintptr_t parm4, uintptr_t parm5)
{
register long r0 asm("a0") = (long)(nbr);
register long r1 asm("a1") = (long)(parm1);
register long r2 asm("a2") = (long)(parm2);
register long r3 asm("a3") = (long)(parm3);
register long r4 asm("a4") = (long)(parm4);
register long r5 asm("a5") = (long)(parm5);
asm volatile
(
"ecall"
:: "r"(r0), "r"(r1), "r"(r2), "r"(r3), "r"(r4), "r"(r5)
: "memory"
);
asm volatile("nop" : "=r"(r0));
return r0;
}
* Name: sys_call6
*
* Description:
* System call SYS_ argument and six additional parameters.
*
****************************************************************************/
static inline uintptr_t sys_call6(unsigned int nbr, uintptr_t parm1,
uintptr_t parm2, uintptr_t parm3,
uintptr_t parm4, uintptr_t parm5,
uintptr_t parm6)
{
register long r0 asm("a0") = (long)(nbr);
register long r1 asm("a1") = (long)(parm1);
register long r2 asm("a2") = (long)(parm2);
register long r3 asm("a3") = (long)(parm3);
register long r4 asm("a4") = (long)(parm4);
register long r5 asm("a5") = (long)(parm5);
register long r6 asm("a6") = (long)(parm6);
asm volatile
(
"ecall"
:: "r"(r0), "r"(r1), "r"(r2), "r"(r3), "r"(r4), "r"(r5), "r"(r6)
: "memory"
);
asm volatile("nop" : "=r"(r0));
return r0;
}
#endif
* Name: up_assert
****************************************************************************/
#define up_assert(filename, linenum, msg) \
sys_call3(SYS_assert_handler, (uintptr_t)filename, \
(uintptr_t)linenum, (uintptr_t)msg);
#undef EXTERN
#ifdef __cplusplus
}
#endif
#endif
#endif