| 1 | /* m32r device support |
| 2 | Copyright (C) 1997-2015 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 3 of the License, or |
| 10 | (at your option) 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 |
| 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | #include "sim-main.h" |
| 21 | |
| 22 | #ifdef HAVE_DV_SOCKSER |
| 23 | #include "dv-sockser.h" |
| 24 | #endif |
| 25 | |
| 26 | /* Handling the MSPR register is done by creating a device in the core |
| 27 | mapping that winds up here. */ |
| 28 | |
| 29 | device m32r_devices; |
| 30 | |
| 31 | int |
| 32 | device_io_read_buffer (device *me, void *source, int space, |
| 33 | address_word addr, unsigned nr_bytes, |
| 34 | SIM_DESC sd, SIM_CPU *cpu, sim_cia cia) |
| 35 | { |
| 36 | if (STATE_ENVIRONMENT (sd) != OPERATING_ENVIRONMENT) |
| 37 | return nr_bytes; |
| 38 | |
| 39 | #ifdef HAVE_DV_SOCKSER |
| 40 | if (addr == UART_INCHAR_ADDR) |
| 41 | { |
| 42 | int c = dv_sockser_read (sd); |
| 43 | if (c == -1) |
| 44 | return 0; |
| 45 | *(char *) source = c; |
| 46 | return 1; |
| 47 | } |
| 48 | if (addr == UART_STATUS_ADDR) |
| 49 | { |
| 50 | int status = dv_sockser_status (sd); |
| 51 | unsigned char *p = source; |
| 52 | p[0] = 0; |
| 53 | p[1] = (((status & DV_SOCKSER_INPUT_EMPTY) |
| 54 | #ifdef UART_INPUT_READY0 |
| 55 | ? UART_INPUT_READY : 0) |
| 56 | #else |
| 57 | ? 0 : UART_INPUT_READY) |
| 58 | #endif |
| 59 | + ((status & DV_SOCKSER_OUTPUT_EMPTY) ? UART_OUTPUT_READY : 0)); |
| 60 | return 2; |
| 61 | } |
| 62 | #endif |
| 63 | |
| 64 | return nr_bytes; |
| 65 | } |
| 66 | |
| 67 | int |
| 68 | device_io_write_buffer (device *me, const void *source, int space, |
| 69 | address_word addr, unsigned nr_bytes, |
| 70 | SIM_DESC sd, SIM_CPU *cpu, sim_cia cia) |
| 71 | { |
| 72 | #if WITH_SCACHE |
| 73 | /* MSPR support is deprecated but is kept in for upward compatibility |
| 74 | with existing overlay support. */ |
| 75 | if (addr == MSPR_ADDR) |
| 76 | { |
| 77 | if ((*(const char *) source & MSPR_PURGE) != 0) |
| 78 | scache_flush (sd); |
| 79 | return nr_bytes; |
| 80 | } |
| 81 | if (addr == MCCR_ADDR) |
| 82 | { |
| 83 | if ((*(const char *) source & MCCR_CP) != 0) |
| 84 | scache_flush (sd); |
| 85 | return nr_bytes; |
| 86 | } |
| 87 | #endif |
| 88 | |
| 89 | if (STATE_ENVIRONMENT (sd) != OPERATING_ENVIRONMENT) |
| 90 | return nr_bytes; |
| 91 | |
| 92 | #ifdef HAVE_DV_SOCKSER |
| 93 | if (addr == UART_OUTCHAR_ADDR) |
| 94 | { |
| 95 | int rc = dv_sockser_write (sd, *(char *) source); |
| 96 | return rc == 1; |
| 97 | } |
| 98 | #endif |
| 99 | |
| 100 | return nr_bytes; |
| 101 | } |
| 102 | |
| 103 | void |
| 104 | device_error (device *me, const char *message, ...) |
| 105 | { |
| 106 | } |