335ba21657
The immediate number is 8bits in thumb mode: +---------------------+---------------+ |15 14 13 12 11 10 9 8|7 6 5 4 3 2 1 0| +---------------------+---------------+ | 1 1 0 1 1 1 1 1| imm8 | +---------------------+---------------+ The immediate number is 24bits in arm mode: +-----------+-------------------------------------------------------------------------+ |31 30 29 28|27 26 25 24|23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0| +-----------+-----------+-------------------------------------------------------------+ | cond | 1 1 1 1| imm24 | +-----------+-----------+-------------------------------------------------------------+ Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com> Change-Id: I62503cdc377fcee81864e88e981d389bce2e1b45
268 lines
7.8 KiB
C
268 lines
7.8 KiB
C
/****************************************************************************
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* arch/arm/include/armv7-r/syscall.h
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*
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* Copyright (C) 2015 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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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_ARMV7_R_SYSCALL_H
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#define __ARCH_ARM_INCLUDE_ARMV7_R_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 Definitions
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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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/****************************************************************************
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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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static inline uintptr_t sys_call0(unsigned int nbr)
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{
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register long reg0 __asm__("r0") = (long)(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", "r14"
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);
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return reg0;
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}
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/* SVC with SYS_ call number and one parameter */
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static inline uintptr_t sys_call1(unsigned int nbr, uintptr_t parm1)
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{
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register long reg0 __asm__("r0") = (long)(nbr);
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register long reg1 __asm__("r1") = (long)(parm1);
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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", "r14"
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);
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return reg0;
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}
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/* SVC with SYS_ call number and two parameters */
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static inline uintptr_t sys_call2(unsigned int nbr, uintptr_t parm1,
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uintptr_t parm2)
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{
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register long reg0 __asm__("r0") = (long)(nbr);
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register long reg2 __asm__("r2") = (long)(parm2);
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register long reg1 __asm__("r1") = (long)(parm1);
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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", "r14"
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);
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return reg0;
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}
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/* SVC with SYS_ call number and three parameters */
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static inline uintptr_t sys_call3(unsigned int nbr, uintptr_t parm1,
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uintptr_t parm2, uintptr_t parm3)
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{
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register long reg0 __asm__("r0") = (long)(nbr);
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register long reg3 __asm__("r3") = (long)(parm3);
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register long reg2 __asm__("r2") = (long)(parm2);
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register long reg1 __asm__("r1") = (long)(parm1);
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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", "r14"
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);
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return reg0;
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}
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/* SVC with SYS_ call number and four parameters */
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static inline uintptr_t sys_call4(unsigned int nbr, uintptr_t parm1,
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uintptr_t parm2, uintptr_t parm3,
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uintptr_t parm4)
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{
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register long reg0 __asm__("r0") = (long)(nbr);
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register long reg4 __asm__("r4") = (long)(parm4);
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register long reg3 __asm__("r3") = (long)(parm3);
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register long reg2 __asm__("r2") = (long)(parm2);
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register long reg1 __asm__("r1") = (long)(parm1);
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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", "r14"
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);
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return reg0;
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}
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/* SVC with SYS_ call number and five parameters */
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static inline uintptr_t sys_call5(unsigned int nbr, uintptr_t parm1,
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uintptr_t parm2, uintptr_t parm3,
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uintptr_t parm4, uintptr_t parm5)
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{
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register long reg0 __asm__("r0") = (long)(nbr);
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register long reg5 __asm__("r5") = (long)(parm5);
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register long reg4 __asm__("r4") = (long)(parm4);
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register long reg3 __asm__("r3") = (long)(parm3);
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register long reg2 __asm__("r2") = (long)(parm2);
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register long reg1 __asm__("r1") = (long)(parm1);
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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", "r14"
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);
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return reg0;
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}
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/* SVC with SYS_ call number and six parameters */
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static inline uintptr_t sys_call6(unsigned int nbr, uintptr_t parm1,
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uintptr_t parm2, uintptr_t parm3,
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uintptr_t parm4, uintptr_t parm5,
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uintptr_t parm6)
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{
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register long reg0 __asm__("r0") = (long)(nbr);
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register long reg6 __asm__("r6") = (long)(parm6);
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register long reg5 __asm__("r5") = (long)(parm5);
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register long reg4 __asm__("r4") = (long)(parm4);
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register long reg3 __asm__("r3") = (long)(parm3);
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register long reg2 __asm__("r2") = (long)(parm2);
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register long reg1 __asm__("r1") = (long)(parm1);
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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", "r14"
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);
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return reg0;
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}
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/* semihosting(SMH) call with call number and one parameter */
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static inline long smh_call(unsigned int nbr, void *parm)
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{
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register long reg0 __asm__("r0") = (long)(nbr);
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register long reg1 __asm__("r1") = (long)(parm);
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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_smhcall), "r"(reg0), "r"(reg1)
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: "memory", "r14"
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);
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return reg0;
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}
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/****************************************************************************
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* Public Data
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****************************************************************************/
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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#ifdef __cplusplus
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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#undef EXTERN
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#ifdef __cplusplus
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}
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#endif
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#endif /* __ASSEMBLY__ */
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#endif /* __ARCH_ARM_INCLUDE_ARMV7_R_SYSCALL_H */
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