517 lines
23 KiB
C
517 lines
23 KiB
C
/****************************************************************************
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* arch/arm/include/syscall.h
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/* This file should never be included directly but, rather, only indirectly
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* through include/syscall.h or include/sys/sycall.h
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*/
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#ifndef __ARCH_ARM_INCLUDE_SYSCALL_H
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#define __ARCH_ARM_INCLUDE_SYSCALL_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#ifndef __ASSEMBLY__
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# include <stdint.h>
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#endif
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/****************************************************************************
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* Pre-processor Prototypes
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****************************************************************************/
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#define SYS_syscall 0x00
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#if defined(__thumb__) || defined(__thumb2__)
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# define SYS_smhcall 0xab
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#else
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# define SYS_smhcall 0x123456
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#endif
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/* Configuration ************************************************************/
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/* This logic uses three system calls {0,1,2} for context switching and one
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* for the syscall return.
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* So a minimum of four syscall values must be reserved.
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* If CONFIG_BUILD_FLAT isn't defined, then four more syscall values must
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* be reserved.
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*/
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#ifndef CONFIG_BUILD_FLAT
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# define CONFIG_SYS_RESERVED 8
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#else
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# define CONFIG_SYS_RESERVED 4
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#endif
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/* Cortex-M system calls ****************************************************/
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/* SYS call 1:
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*
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* void arm_fullcontextrestore(uint32_t *restoreregs) noreturn_function;
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*/
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#define SYS_restore_context (1)
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/* SYS call 2:
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*
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* void arm_switchcontext(uint32_t **saveregs, uint32_t *restoreregs);
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*/
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#define SYS_switch_context (2)
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#ifdef CONFIG_LIB_SYSCALL
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/* SYS call 3:
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*
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* void arm_syscall_return(void);
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*/
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#define SYS_syscall_return (3)
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#endif /* CONFIG_LIB_SYSCALL */
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#ifndef CONFIG_BUILD_FLAT
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/* SYS call 4:
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*
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* void up_task_start(main_t taskentry, int argc, char *argv[])
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* noreturn_function;
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*/
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#define SYS_task_start (4)
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/* SYS call 5:
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*
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* void up_pthread_start((pthread_startroutine_t startup,
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* pthread_startroutine_t entrypt, pthread_addr_t arg)
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* noreturn_function
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*/
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#define SYS_pthread_start (5)
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/* SYS call 6:
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*
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* void signal_handler(_sa_sigaction_t sighand,
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* int signo, siginfo_t *info,
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* void *ucontext);
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*/
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#define SYS_signal_handler (6)
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/* SYS call 7:
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*
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* void signal_handler_return(void);
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*/
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#define SYS_signal_handler_return (7)
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#endif /* !CONFIG_BUILD_FLAT */
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/****************************************************************************
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* Public Types
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****************************************************************************/
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/****************************************************************************
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* Inline functions
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****************************************************************************/
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#ifndef __ASSEMBLY__
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/* SVC with SYS_ call number and no parameters */
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#ifdef __ghs__
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# define sys_call0(nbr) \
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({ \
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uintptr_t ret; \
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__asm__ __volatile__ \
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( \
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"mov r0, %2\n\t" \
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"svc %1\n\t" \
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"mov %0, r0" \
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: "=r"(ret) \
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: "i"(SYS_syscall), "r"((uintptr_t)nbr) \
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: "memory", "r0" \
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); \
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ret; \
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})
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#else
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# define sys_call0(nbr) \
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({ \
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register uintptr_t reg0 __asm__("r0") = (uintptr_t)(nbr); \
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__asm__ __volatile__ \
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( \
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"svc %1" \
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: "=r"(reg0) \
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: "i"(SYS_syscall), "r"(reg0) \
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: "memory" \
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); \
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reg0; \
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})
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#endif
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/* SVC with SYS_ call number and one parameter */
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#ifdef __ghs__
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# define sys_call1(nbr, parm1) \
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({ \
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uintptr_t ret; \
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__asm__ __volatile__ \
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( \
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"mov r0, %2\n\t" \
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"mov r1, %3\n\t" \
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"svc %1\n\t" \
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"mov %0, r0" \
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: "=r"(ret) \
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: "i"(SYS_syscall), "r"((uintptr_t)nbr), \
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"r"((uintptr_t)parm1) \
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: "memory", "r0", "r1" \
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); \
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ret; \
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})
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#else
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# define sys_call1(nbr, parm1) \
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({ \
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register uintptr_t reg1 __asm__("r1") = (uintptr_t)(parm1); \
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register uintptr_t reg0 __asm__("r0") = (uintptr_t)(nbr); \
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__asm__ __volatile__ \
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( \
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"svc %1" \
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: "=r"(reg0) \
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: "i"(SYS_syscall), "r"(reg0), "r"(reg1) \
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: "memory" \
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); \
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reg0; \
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})
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#endif
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/* SVC with SYS_ call number and two parameters */
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#ifdef __ghs__
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# define sys_call2(nbr, parm1, parm2) \
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({ \
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uintptr_t ret; \
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__asm__ __volatile__ \
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( \
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"mov r0, %2\n\t" \
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"mov r1, %3\n\t" \
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"mov r2, %4\n\t" \
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"svc %1\n\t" \
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"mov %0, r0" \
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: "=r"(ret) \
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: "i"(SYS_syscall), "r"((uintptr_t)nbr), \
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"r"((uintptr_t)parm1), "r"((uintptr_t)parm2) \
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: "memory", "r0", "r1", "r2" \
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); \
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ret; \
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})
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#else
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# define sys_call2(nbr, parm1, parm2) \
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({ \
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register uintptr_t reg2 __asm__("r2") = (uintptr_t)(parm2); \
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register uintptr_t reg1 __asm__("r1") = (uintptr_t)(parm1); \
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register uintptr_t reg0 __asm__("r0") = (uintptr_t)(nbr); \
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__asm__ __volatile__ \
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( \
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"svc %1" \
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: "=r"(reg0) \
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: "i"(SYS_syscall), "r"(reg0), "r"(reg1), "r"(reg2) \
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: "memory" \
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); \
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reg0; \
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})
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#endif
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/* SVC with SYS_ call number and three parameters */
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#ifdef __ghs__
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# define sys_call3(nbr, parm1, parm2, parm3) \
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({ \
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uintptr_t ret; \
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__asm__ __volatile__ \
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( \
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"mov r0, %2\n\t" \
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"mov r1, %3\n\t" \
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"mov r2, %4\n\t" \
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"mov r3, %5\n\t" \
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"svc %1\n\t" \
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"mov %0, r0" \
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: "=r"(ret) \
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: "i"(SYS_syscall), "r"((uintptr_t)nbr), "r"((uintptr_t)parm1), \
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"r"((uintptr_t)parm2), "r"((uintptr_t)parm3) \
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: "memory", "r0", "r1", "r2", "r3" \
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); \
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ret; \
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})
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#else
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# define sys_call3(nbr, parm1, parm2, parm3) \
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({ \
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register uintptr_t reg3 __asm__("r3") = (uintptr_t)(parm3); \
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register uintptr_t reg2 __asm__("r2") = (uintptr_t)(parm2); \
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register uintptr_t reg1 __asm__("r1") = (uintptr_t)(parm1); \
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register uintptr_t reg0 __asm__("r0") = (uintptr_t)(nbr); \
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__asm__ __volatile__ \
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( \
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"svc %1" \
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: "=r"(reg0) \
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: "i"(SYS_syscall), "r"(reg0), "r"(reg1), "r"(reg2), "r"(reg3) \
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: "memory" \
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); \
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reg0; \
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})
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#endif
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/* SVC with SYS_ call number and four parameters */
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#ifdef __ghs__
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# define sys_call4(nbr, parm1, parm2, parm3, parm4) \
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({ \
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uintptr_t ret; \
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__asm__ __volatile__ \
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( \
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"push {r4}\n\t" \
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"mov r0, %2\n\t" \
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"mov r1, %3\n\t" \
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"mov r2, %4\n\t" \
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"mov r3, %5\n\t" \
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"mov r4, %6\n\t" \
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"svc %1\n\t" \
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"pop {r4}\n\t" \
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"mov %0, r0" \
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: "=r"(ret) \
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: "i"(SYS_syscall), "r"((uintptr_t)nbr), "r"((uintptr_t)parm1), \
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"r"((uintptr_t)parm2), "r"((uintptr_t)parm3), "r"((uintptr_t)parm4) \
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: "memory", "r0", "r1", "r2", "r3" \
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); \
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ret; \
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})
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#else
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# define sys_call4(nbr, parm1, parm2, parm3, parm4) \
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({ \
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register uintptr_t reg4 __asm__("r4") = (uintptr_t)(parm4); \
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register uintptr_t reg3 __asm__("r3") = (uintptr_t)(parm3); \
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register uintptr_t reg2 __asm__("r2") = (uintptr_t)(parm2); \
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register uintptr_t reg1 __asm__("r1") = (uintptr_t)(parm1); \
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register uintptr_t reg0 __asm__("r0") = (uintptr_t)(nbr); \
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__asm__ __volatile__ \
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( \
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"svc %1" \
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: "=r"(reg0) \
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: "i"(SYS_syscall), "r"(reg0), "r"(reg1), "r"(reg2), \
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"r"(reg3), "r"(reg4) \
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: "memory" \
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); \
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reg0; \
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})
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#endif
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/* SVC with SYS_ call number and five parameters */
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#ifdef __ghs__
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# define sys_call5(nbr, parm1, parm2, parm3, parm4, parm5) \
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({ \
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uintptr_t ret; \
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__asm__ __volatile__ \
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( \
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"push {r3-r5}\n\t" \
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"push {%7}\n\t" \
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"push {%6}\n\t" \
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"mov r0, %2\n\t" \
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"mov r1, %3\n\t" \
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"mov r2, %4\n\t" \
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"mov r3, %5\n\t" \
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"pop {r4-r5}\n\t" \
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"svc %1\n\t" \
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"pop {r3-r5}\n\t" \
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"mov %0, r0" \
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: "=r"(ret) \
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: "i"(SYS_syscall), "r"((uintptr_t)nbr), "r"((uintptr_t)parm1), \
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"r"((uintptr_t)parm2), "r"((uintptr_t)parm3), "r"((uintptr_t)parm4), \
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"r"((uintptr_t)parm5) \
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: "memory", "r0", "r1", "r2" \
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); \
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ret; \
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})
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#else
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# define sys_call5(nbr, parm1, parm2, parm3, parm4, parm5) \
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({ \
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register uintptr_t reg5 __asm__("r5") = (uintptr_t)(parm5); \
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register uintptr_t reg4 __asm__("r4") = (uintptr_t)(parm4); \
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register uintptr_t reg3 __asm__("r3") = (uintptr_t)(parm3); \
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register uintptr_t reg2 __asm__("r2") = (uintptr_t)(parm2); \
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register uintptr_t reg1 __asm__("r1") = (uintptr_t)(parm1); \
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register uintptr_t reg0 __asm__("r0") = (uintptr_t)(nbr); \
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__asm__ __volatile__ \
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( \
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"svc %1" \
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: "=r"(reg0) \
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: "i"(SYS_syscall), "r"(reg0), "r"(reg1), "r"(reg2), \
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"r"(reg3), "r"(reg4), "r"(reg5) \
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: "memory" \
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); \
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reg0; \
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})
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#endif
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/* SVC with SYS_ call number and six parameters */
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#ifdef __ghs__
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# define sys_call6(nbr, parm1, parm2, parm3, parm4, parm5, parm6) \
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({ \
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uintptr_t ret; \
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__asm__ __volatile__ \
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( \
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"push {r2-r6}\n\t" \
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"push {%8}\n\t" \
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"push {%7}\n\t" \
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"push {%6}\n\t" \
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"push {%5}\n\t" \
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"mov r0, %2\n\t" \
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"mov r1, %3\n\t" \
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"mov r2, %4\n\t" \
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"pop {r3-r6}\n\t" \
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"svc %1\n\t" \
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"pop {r2-r6}\n\t" \
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"mov %0, r0" \
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: "=r"(ret) \
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: "i"(SYS_syscall), "r"((uintptr_t)nbr), "r"((uintptr_t)parm1), \
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"r"((uintptr_t)parm2), "r"((uintptr_t)parm3), "r"((uintptr_t)parm4), \
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"r"((uintptr_t)parm5), "r"((uintptr_t)parm6) \
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: "memory", "r0", "r1" \
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); \
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ret; \
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})
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#else
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# define sys_call6(nbr, parm1, parm2, parm3, parm4, parm5, parm6) \
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({ \
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register uintptr_t reg6 __asm__("r6") = (uintptr_t)(parm6); \
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register uintptr_t reg5 __asm__("r5") = (uintptr_t)(parm5); \
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register uintptr_t reg4 __asm__("r4") = (uintptr_t)(parm4); \
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register uintptr_t reg3 __asm__("r3") = (uintptr_t)(parm3); \
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register uintptr_t reg2 __asm__("r2") = (uintptr_t)(parm2); \
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register uintptr_t reg1 __asm__("r1") = (uintptr_t)(parm1); \
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register uintptr_t reg0 __asm__("r0") = (uintptr_t)(nbr); \
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__asm__ __volatile__ \
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( \
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"svc %1" \
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: "=r"(reg0) \
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: "i"(SYS_syscall), "r"(reg0), "r"(reg1), "r"(reg2), \
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"r"(reg3), "r"(reg4), "r"(reg5), "r"(reg6) \
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: "memory" \
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); \
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reg0; \
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})
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#endif
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/* semihosting(SMH) call with call number and one parameter */
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#ifdef __ghs__
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# if defined(CONFIG_ARCH_ARMV6M) || \
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defined(CONFIG_ARCH_ARMV7M) || \
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defined(CONFIG_ARCH_ARMV8M)
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# define smh_call(nbr, parm1) \
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({ \
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uintptr_t ret; \
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__asm__ __volatile__ \
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( \
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"mov r0, %2\n\t" \
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"mov r1, %3\n\t" \
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"bkpt %1\n\t" \
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"mov %0, r0" \
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: "=r"(ret) \
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: "i"(SYS_smhcall), "r"((uintptr_t)nbr), "r"((uintptr_t)parm1) \
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: "memory", "r0", "r1" \
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); \
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ret; \
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})
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# else
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# define smh_call(nbr, parm1) \
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({ \
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uintptr_t ret; \
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__asm__ __volatile__ \
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( \
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"mov r0, %2\n\t" \
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"mov r1, %3\n\t" \
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"svc %1\n\t" \
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"mov %0, r0" \
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: "=r"(ret) \
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: "i"(SYS_smhcall), "r"((uintptr_t)nbr), "r"((uintptr_t)parm1) \
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: "memory", "r0", "r1" \
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); \
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ret; \
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})
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# endif
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#else
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# if defined(CONFIG_ARCH_ARMV6M) || \
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defined(CONFIG_ARCH_ARMV7M) || \
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defined(CONFIG_ARCH_ARMV8M)
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# define smh_call(nbr, parm1) \
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({ \
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register uintptr_t reg1 __asm__("r1") = (uintptr_t)(parm1); \
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register uintptr_t reg0 __asm__("r0") = (uintptr_t)(nbr); \
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__asm__ __volatile__ \
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( \
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"bkpt %1" \
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: "=r"(reg0) \
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: "i"(SYS_smhcall), "r"(reg0), "r"(reg1) \
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: "memory" \
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); \
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reg0; \
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})
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# else
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# define smh_call(nbr, parm1) \
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({ \
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register uintptr_t reg1 __asm__("r1") = (uintptr_t)(parm1); \
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register uintptr_t reg0 __asm__("r0") = (uintptr_t)(nbr); \
|
|
__asm__ __volatile__ \
|
|
( \
|
|
"svc %1" \
|
|
: "=r"(reg0) \
|
|
: "i"(SYS_smhcall), "r"(reg0), "r"(reg1) \
|
|
: "memory" \
|
|
); \
|
|
reg0; \
|
|
})
|
|
# endif
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Public Data
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Public Function Prototypes
|
|
****************************************************************************/
|
|
|
|
#ifdef __cplusplus
|
|
#define EXTERN extern "C"
|
|
extern "C"
|
|
{
|
|
#else
|
|
#define EXTERN extern
|
|
#endif
|
|
|
|
#undef EXTERN
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
#endif /* __ARCH_ARM_INCLUDE_SYSCALL_H */
|