61 lines
1.6 KiB
C
61 lines
1.6 KiB
C
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/* syscall.h -- CR16 virtual I/O and trap service codes
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*
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* Copyright (c) 2004 National Semiconductor Corporation
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*
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* The authors hereby grant permission to use, copy, modify, distribute,
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* and license this software and its documentation for any purpose, provided
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* that existing copyright notices are retained in all copies and that this
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* notice is included verbatim in any distributions. No written agreement,
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* license, or royalty fee is required for any of the authorized uses.
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* Modifications to this software may be copyrighted by their authors
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* and need not follow the licensing terms described here, provided that
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* the new terms are clearly indicated on the first page of each file where
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* they apply.
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*/
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#ifndef _SYSCALL_H
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#define _SYSCALL_H
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#include <sys/asm.h>
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/* SVC codes to pass to the debugger */
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/* Virtual I/O services */
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#define SVC_OPEN 0x401
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#define SVC_CLOSE 0x402
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#define SVC_READ 0x403
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#define SVC_WRITE 0x404
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#define SVC_LSEEK 0x405
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#define SVC_RENAME 0x406
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#define SVC_UNLINK 0x407
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#define SVC_GETENV 0x408
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/* Time service */
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#define SVC_TIME 0x300
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/* Start/end of program services */
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#define SVC_EOP 0x410
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/* Trap services */
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#define SVC_SVC 0x505
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#define SVC_DVZ 0x506
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#define SVC_FLG 0x507
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#define SVC_UND 0x50a
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#define SVC_IAD 0x50c
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/* Places the code of the requested service in R0, then transfers control
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to the debugger using the BPT exception.
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It is called from the start routine, VIO functions and the trap
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handlers. */
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#define STRINGIFY(x) #x
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#define HOST_SERVICE(service) \
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do { \
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__asm__("movd\t$" STRINGIFY(service) ",(r1,r0)"); \
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_excp_(svc); \
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} while (0)
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#endif /* _SYSCALL_H */
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