1 //=============================================================================
7 //=============================================================================
8 //####ECOSGPLCOPYRIGHTBEGIN####
9 // -------------------------------------------
10 // This file is part of eCos, the Embedded Configurable Operating System.
11 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
13 // eCos is free software; you can redistribute it and/or modify it under
14 // the terms of the GNU General Public License as published by the Free
15 // Software Foundation; either version 2 or (at your option) any later version.
17 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
18 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
19 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
22 // You should have received a copy of the GNU General Public License along
23 // with eCos; if not, write to the Free Software Foundation, Inc.,
24 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
26 // As a special exception, if other files instantiate templates or use macros
27 // or inline functions from this file, or you compile this file and link it
28 // with other works to produce a work based on this file, this file does not
29 // by itself cause the resulting work to be covered by the GNU General Public
30 // License. However the source code for this file must still be made available
31 // in accordance with section (3) of the GNU General Public License.
33 // This exception does not invalidate any other reasons why a work based on
34 // this file might be covered by the GNU General Public License.
36 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
37 // at http://sources.redhat.com/ecos/ecos-license/
38 // -------------------------------------------
39 //####ECOSGPLCOPYRIGHTEND####
40 //=============================================================================
41 //#####DESCRIPTIONBEGIN####
44 // Contributors:msalter
51 //####DESCRIPTIONEND####
53 //=============================================================================
55 #include <pkgconf/hal.h>
58 #include <pkgconf/redboot.h>
61 #if defined(CYGSEM_REDBOOT_BSP_SYSCALLS)
63 #include <cyg/hal/hal_stub.h> // Our header
64 #include <cyg/hal/hal_arch.h> // HAL_BREAKINST
65 #include <cyg/hal/hal_cache.h> // HAL_xCACHE_x
66 #include <cyg/hal/hal_intr.h> // interrupt disable/restore
68 #include <cyg/hal/hal_if.h> // ROM calling interface
69 #include <cyg/hal/hal_misc.h> // Helper functions
71 extern int __do_syscall(int func, // syscall function number
72 long arg1, long arg2, // up to four args.
74 int *retval, // syscall return value
75 int *sig); // signal to return (or 0)
78 #define SYS_interrupt 1000
81 hal_syscall_handler(void)
83 int func, arg1, arg2, arg3, arg4;
89 // What is the instruction we were executing
91 inst.word = *(unsigned long *)(regs->_pc - ARM_INST_SIZE);
93 // Not a syscall. Don't handle it
94 if ((inst.swi.rsv1 != SWI_RSV1_VALUE) || (inst.swi.swi_number != SYSCALL_SWI))
98 func = get_register(R0);
99 arg1 = get_register(R1);
100 arg2 = get_register(R2);
101 arg3 = get_register(R3);
102 arg4 = *(unsigned int *)(get_register(SP) + 4);
104 if ((get_register(PS) & CPSR_MODE_BITS) == CPSR_SUPERVISOR_MODE)
105 put_register(PC, get_register(IP));
107 put_register(PC, get_register(LR));
109 if (func == SYS_interrupt) {
110 // A console interrupt landed us here.
111 // Invoke the debug agent so as to cause a SIGINT.
115 if (__do_syscall(func, arg1, arg2, arg3, arg4, &err, &sig)) {
116 put_register(R0, err);
123 #endif // CYGSEM_REDBOOT_BSP_SYSCALLS