1 /*=============================================================================
5 // HAL diagnostic output code
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: nickg
46 // Purpose: HAL diagnostic output
47 // Description: Implementations of HAL diagnostic output support.
49 //####DESCRIPTIONEND####
51 //===========================================================================*/
53 #include <pkgconf/hal.h>
55 #include <cyg/infra/cyg_type.h> // base types
56 #include <cyg/infra/cyg_trac.h> // tracing macros
57 #include <cyg/infra/cyg_ass.h> // assertion macros
59 #include <cyg/hal/hal_arch.h>
60 #include <cyg/hal/hal_diag.h>
62 #include <cyg/hal/hal_intr.h>
64 #include <cyg/hal/hal_io.h>
66 #include <cyg/hal/plf_stub.h>
69 #if defined(CYGSEM_HAL_USE_ROM_MONITOR_GDB_stubs)
71 #define CYG_KERNEL_DIAG_GDB
75 /*---------------------------------------------------------------------------*/
79 cyg_hal_plf_comms_init();
82 /*---------------------------------------------------------------------------*/
84 void hal_diag_write_char(char c)
86 #ifdef CYG_KERNEL_DIAG_GDB
87 static char line[100];
90 // No need to send CRs
91 if( c == '\r' ) return;
95 if( c == '\n' || pos == sizeof(line) )
98 // Disable interrupts. This prevents GDB trying to interrupt us
99 // while we are in the middle of sending a packet. The serial
100 // receive interrupt will be seen when we re-enable interrupts
102 CYG_INTERRUPT_STATE oldstate;
103 HAL_DISABLE_INTERRUPTS(oldstate);
107 static char hex[] = "0123456789ABCDEF";
112 cyg_hal_plf_serial_putc(NULL, '$');
113 cyg_hal_plf_serial_putc(NULL, 'O');
115 for( i = 0; i < pos; i++ )
118 char h = hex[(ch>>4)&0xF];
119 char l = hex[ch&0xF];
120 cyg_hal_plf_serial_putc(NULL, h);
121 cyg_hal_plf_serial_putc(NULL, l);
125 cyg_hal_plf_serial_putc(NULL, '#');
126 cyg_hal_plf_serial_putc(NULL, hex[(csum>>4)&0xF]);
127 cyg_hal_plf_serial_putc(NULL, hex[csum&0xF]);
129 c1 = cyg_hal_plf_serial_getc( NULL );
131 if( c1 == '+' ) break;
133 if( cyg_hal_is_break( &c1 , 1 ) )
134 cyg_hal_user_break( NULL );
140 // Wait for all data from serial line to drain
141 // and clear ready-to-send indication.
142 // hal_diag_drain_serial0();
144 // Disabling the interrupts for an extended period of time
145 // can provoke a spurious interrupt 0. FIXME - why?
146 #ifdef CYGSEM_HAL_MIPS_VR4300_VRC437X_DIAG_ACKS_INT_0
147 HAL_INTERRUPT_ACKNOWLEDGE( CYGNUM_HAL_INTERRUPT_VRC437X );
150 // And re-enable interrupts
151 HAL_RESTORE_INTERRUPTS( oldstate );
155 cyg_hal_plf_serial_putc(NULL, c);
159 /*---------------------------------------------------------------------------*/
161 void hal_diag_read_char(char *c)
163 *c = cyg_hal_plf_serial_getc(NULL);
166 /*---------------------------------------------------------------------------*/
167 /* End of hal_diag.c */