Commit | Line | Data |
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c906108c SS |
1 | /* i960 device support |
2 | Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc. | |
3 | Contributed by Cygnus Solutions. | |
4 | ||
5 | This file is part of GDB, the GNU debugger. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2, or (at your option) | |
10 | any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License along | |
18 | with this program; if not, write to the Free Software Foundation, Inc., | |
19 | 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
20 | ||
21 | #include "sim-main.h" | |
22 | ||
23 | #ifdef HAVE_DV_SOCKSER | |
24 | #include "dv-sockser.h" | |
25 | #endif | |
26 | ||
27 | /* Handling the MSPR register is done by creating a device in the core | |
28 | mapping that winds up here. */ | |
29 | ||
30 | device i960_devices; | |
31 | ||
32 | int | |
33 | device_io_read_buffer (device *me, void *source, int space, | |
34 | address_word addr, unsigned nr_bytes, | |
35 | SIM_CPU *cpu, sim_cia cia) | |
36 | { | |
37 | SIM_DESC sd = CPU_STATE (cpu); | |
38 | ||
39 | if (STATE_ENVIRONMENT (sd) != OPERATING_ENVIRONMENT) | |
40 | return nr_bytes; | |
41 | ||
42 | #ifdef HAVE_DV_SOCKSER | |
43 | if (addr == UART_INCHAR_ADDR) | |
44 | { | |
45 | int c = dv_sockser_read (sd); | |
46 | if (c == -1) | |
47 | return 0; | |
48 | *(char *) source = c; | |
49 | return 1; | |
50 | } | |
51 | if (addr == UART_STATUS_ADDR) | |
52 | { | |
53 | int status = dv_sockser_status (sd); | |
54 | unsigned char *p = source; | |
55 | p[0] = 0; | |
56 | p[1] = (((status & DV_SOCKSER_INPUT_EMPTY) | |
57 | #ifdef UART_INPUT_READY0 | |
58 | ? UART_INPUT_READY : 0) | |
59 | #else | |
60 | ? 0 : UART_INPUT_READY) | |
61 | #endif | |
62 | + ((status & DV_SOCKSER_OUTPUT_EMPTY) ? UART_OUTPUT_READY : 0)); | |
63 | return 2; | |
64 | } | |
65 | #endif | |
66 | ||
67 | return nr_bytes; | |
68 | } | |
69 | ||
70 | int | |
71 | device_io_write_buffer (device *me, const void *source, int space, | |
72 | address_word addr, unsigned nr_bytes, | |
73 | SIM_CPU *cpu, sim_cia cia) | |
74 | { | |
75 | SIM_DESC sd = CPU_STATE (cpu); | |
76 | ||
77 | #if WITH_SCACHE | |
78 | /* MSPR support is deprecated but is kept in for upward compatibility | |
79 | with existing overlay support. */ | |
80 | if (addr == MSPR_ADDR) | |
81 | { | |
82 | if ((*(const char *) source & MSPR_PURGE) != 0) | |
83 | scache_flush (sd); | |
84 | return nr_bytes; | |
85 | } | |
86 | if (addr == MCCR_ADDR) | |
87 | { | |
88 | if ((*(const char *) source & MCCR_CP) != 0) | |
89 | scache_flush (sd); | |
90 | return nr_bytes; | |
91 | } | |
92 | #endif | |
93 | ||
94 | if (STATE_ENVIRONMENT (sd) != OPERATING_ENVIRONMENT) | |
95 | return nr_bytes; | |
96 | ||
97 | #if HAVE_DV_SOCKSER | |
98 | if (addr == UART_OUTCHAR_ADDR) | |
99 | { | |
100 | int rc = dv_sockser_write (sd, *(char *) source); | |
101 | return rc == 1; | |
102 | } | |
103 | #endif | |
104 | ||
105 | return nr_bytes; | |
106 | } | |
107 | ||
108 | void device_error () {} |