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dpavlin |
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/* |
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* Copyright (C) 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_malta.c,v 1.2 2005/06/22 00:39:45 debug Exp $ |
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* |
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* Malta (evbmips) interrupt controller. |
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* |
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* TODO: This is basically a dummy device so far. |
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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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#include "cpu.h" |
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#include "device.h" |
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#include "devices.h" |
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#include "emul.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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* dev_malta_hi_access(): |
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*/ |
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int dev_malta_hi_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 malta_data *d = (struct malta_data *) extra; |
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uint64_t idata = 0, odata = 0; |
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int i; |
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idata = memory_readmax64(cpu, data, len); |
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switch (relative_addr) { |
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case 0: if (writeflag == MEM_READ) { |
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odata = 0; |
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for (i=0; i<7; i++) |
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if (d->assert_hi & (1<<i)) |
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odata = i; |
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if (odata) |
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odata |= 0x80; |
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d->assert_hi = 0; |
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cpu_interrupt_ack(cpu, 8 + 2); |
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} else { |
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/* TODO */ |
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} |
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break; |
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default:if (writeflag == MEM_WRITE) { |
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fatal("[ malta: hi unimplemented write to " |
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"offset 0x%x: data=0x%02x ]\n", (int) |
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relative_addr, (int)idata); |
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} else { |
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fatal("[ malta: hi unimplemented read from " |
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"offset 0x%x ]\n", (int)relative_addr); |
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} |
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} |
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if (writeflag == MEM_READ) |
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memory_writemax64(cpu, data, len, odata); |
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return 1; |
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} |
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/* |
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* dev_malta_access(): |
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*/ |
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int dev_malta_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 malta_data *d = (struct malta_data *) extra; |
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uint64_t idata = 0, odata = 0; |
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int i; |
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idata = memory_readmax64(cpu, data, len); |
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switch (relative_addr) { |
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case 0: if (writeflag == MEM_READ) { |
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odata = 0; |
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for (i=0; i<7; i++) |
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if (d->assert_lo & (1<<i)) |
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odata = i; |
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if (odata) |
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odata |= 0x80; |
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d->assert_lo = 0; |
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cpu_interrupt_ack(cpu, 8 + 16); |
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} else { |
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/* TODO */ |
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} |
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break; |
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default:if (writeflag == MEM_WRITE) { |
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fatal("[ malta: unimplemented write to " |
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"offset 0x%x: data=0x%02x ]\n", (int) |
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relative_addr, (int)idata); |
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} else { |
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fatal("[ malta: unimplemented read from " |
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"offset 0x%x ]\n", (int)relative_addr); |
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} |
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} |
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if (writeflag == MEM_READ) |
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memory_writemax64(cpu, data, len, odata); |
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return 1; |
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} |
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/* |
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* devinit_malta(): |
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*/ |
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int devinit_malta(struct devinit *devinit) |
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{ |
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struct malta_data *d = malloc(sizeof(struct malta_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 malta_data)); |
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memory_device_register(devinit->machine->memory, devinit->name, |
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devinit->addr, 1, |
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dev_malta_access, (void *)d, MEM_DEFAULT, NULL); |
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memory_device_register(devinit->machine->memory, devinit->name, |
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devinit->addr + 0x80, 1, |
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dev_malta_hi_access, (void *)d, MEM_DEFAULT, NULL); |
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devinit->return_ptr = d; |
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return 1; |
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} |
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