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/* |
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* Copyright (C) 2003-2005 Anders Gavare. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. The name of the author may not be used to endorse or promote products |
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* derived from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* |
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* |
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* $Id: dev_cons.c,v 1.28 2005/11/13 00:14:08 debug Exp $ |
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* |
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* A simple console device, useful for simple tests. |
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* |
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* This device provides memory mapped I/O for a simple console supporting |
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* putchar (writing to memory) and getchar (reading from memory), and |
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* support for halting the emulator. (This is useful for regression tests, |
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* Hello World-style test programs, and other simple experiments.) |
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*/ |
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|
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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|
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#include "console.h" |
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#include "cpu.h" |
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#include "device.h" |
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#include "devices.h" |
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#include "machine.h" |
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#include "memory.h" |
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#include "misc.h" |
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|
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|
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#define CONS_TICK_SHIFT 14 |
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|
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|
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/* |
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* dev_cons_tick(): |
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*/ |
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void dev_cons_tick(struct cpu *cpu, void *extra) |
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{ |
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struct cpu *c = cpu->machine->cpus[0]; |
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struct cons_data *d = extra; |
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|
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cpu_interrupt_ack(c, d->irq_nr); |
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|
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if (console_charavail(d->console_handle)) |
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cpu_interrupt(c, d->irq_nr); |
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} |
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|
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|
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/* |
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* dev_cons_access(): |
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*/ |
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int dev_cons_access(struct cpu *cpu, struct memory *mem, |
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uint64_t relative_addr, unsigned char *data, size_t len, |
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int writeflag, void *extra) |
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{ |
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struct cons_data *d = extra; |
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int i; |
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|
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/* Exit the emulator: */ |
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if (relative_addr == DEV_CONS_HALT) { |
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cpu->running = 0; |
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cpu->machine->exit_without_entering_debugger = 1; |
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return 1; |
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} |
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|
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if (writeflag == MEM_WRITE) { |
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for (i=0; i<len; i++) { |
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if (data[i] != 0) { |
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if (cpu->machine->register_dump || |
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cpu->machine->instruction_trace) |
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debug("putchar '"); |
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|
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console_putchar(d->console_handle, data[i]); |
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|
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if (cpu->machine->register_dump || |
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cpu->machine->instruction_trace) |
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debug("'\n"); |
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fflush(stdout); |
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} |
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} |
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} else { |
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int ch = console_readchar(d->console_handle); |
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if (ch < 0) |
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ch = 0; |
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for (i=0; i<len; i++) |
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data[i] = ch; |
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} |
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|
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dev_cons_tick(cpu, extra); |
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|
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return 1; |
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} |
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|
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|
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/* |
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* devinit_cons(): |
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*/ |
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int devinit_cons(struct devinit *devinit) |
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{ |
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struct cons_data *d; |
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char *name3; |
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size_t nlen; |
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|
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d = malloc(sizeof(struct cons_data)); |
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if (d == NULL) { |
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fprintf(stderr, "out of memory\n"); |
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exit(1); |
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} |
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memset(d, 0, sizeof(struct cons_data)); |
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|
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nlen = strlen(devinit->name) + 10; |
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if (devinit->name2 != NULL) |
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nlen += strlen(devinit->name2) + 10; |
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name3 = malloc(nlen); |
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if (name3 == NULL) { |
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fprintf(stderr, "out of memory in dev_cons_init()\n"); |
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exit(1); |
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} |
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if (devinit->name2 != NULL && devinit->name2[0]) |
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snprintf(name3, nlen, "%s [%s]", devinit->name, devinit->name2); |
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else |
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snprintf(name3, nlen, "%s", devinit->name); |
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|
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d->irq_nr = devinit->irq_nr; |
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d->console_handle = console_start_slave(devinit->machine, name3); |
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|
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memory_device_register(devinit->machine->memory, name3, |
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devinit->addr, DEV_CONS_LENGTH, dev_cons_access, d, |
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DM_DEFAULT, NULL); |
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machine_add_tickfunction(devinit->machine, dev_cons_tick, |
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d, CONS_TICK_SHIFT); |
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|
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devinit->return_ptr = d; |
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return 1; |
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} |
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