| /* syscall.h -- CRX virtual I/O and trap service codes |
| * |
| * Copyright (c) 2004 National Semiconductor Corporation |
| * |
| * The authors hereby grant permission to use, copy, modify, distribute, |
| * and license this software and its documentation for any purpose, provided |
| * that existing copyright notices are retained in all copies and that this |
| * notice is included verbatim in any distributions. No written agreement, |
| * license, or royalty fee is required for any of the authorized uses. |
| * Modifications to this software may be copyrighted by their authors |
| * and need not follow the licensing terms described here, provided that |
| * the new terms are clearly indicated on the first page of each file where |
| * they apply. |
| */ |
| |
| #ifndef _SYSCALL_H |
| #define _SYSCALL_H |
| |
| #include <sys/asm.h> |
| |
| /* SVC codes to pass to the debugger */ |
| |
| /* Virtual I/O services */ |
| #define SVC_OPEN 0x401 |
| #define SVC_CLOSE 0x402 |
| #define SVC_READ 0x403 |
| #define SVC_WRITE 0x404 |
| #define SVC_LSEEK 0x405 |
| #define SVC_RENAME 0x406 |
| #define SVC_UNLINK 0x407 |
| #define SVC_GETENV 0x408 |
| |
| /* Time service */ |
| #define SVC_TIME 0x300 |
| |
| /* Start/end of program services */ |
| #define SVC_EOP 0x410 |
| |
| /* Trap services */ |
| #define SVC_SVC 0x505 |
| #define SVC_DVZ 0x506 |
| #define SVC_FLG 0x507 |
| #define SVC_UND 0x50a |
| #define SVC_IAD 0x50c |
| |
| |
| /* Places the code of the requested service in R0, then transfers control |
| to the debugger using the BPT exception. |
| It is called from the start routine, VIO functions and the trap |
| handlers. */ |
| |
| #define STRINGIFY(x) #x |
| #define HOST_SERVICE(service) \ |
| do { \ |
| __asm__("movd\t$" STRINGIFY(service) ",r0"); \ |
| _excp_(bpt); \ |
| __asm__(".short\t0xFFFF"); \ |
| } while (0) |
| |
| #endif /* _SYSCALL_H */ |
| |