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dpavlin |
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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_gt.c,v 1.21 2005/03/18 23:20:52 debug Exp $ |
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* |
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* The "gt" device used in Cobalt machines. |
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* |
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* TODO: This more or less just 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 "bus_pci.h" |
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#include "cpu.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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#define TICK_STEPS_SHIFT 16 |
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#define PCI_VENDOR_GALILEO 0x11ab /* Galileo Technology */ |
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#define PCI_PRODUCT_GALILEO_GT64011 0x4146 /* GT-64011 System Controller */ |
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struct gt_data { |
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int reg[8]; |
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int irqnr; |
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int pciirq; |
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struct pci_data *pci_data; |
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}; |
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/* |
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* dev_gt_tick(): |
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*/ |
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void dev_gt_tick(struct cpu *cpu, void *extra) |
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{ |
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struct gt_data *gt_data = extra; |
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cpu_interrupt(cpu, gt_data->irqnr); |
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} |
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/* |
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* dev_gt_access(): |
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*/ |
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int dev_gt_access(struct cpu *cpu, struct memory *mem, uint64_t relative_addr, |
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unsigned char *data, size_t len, int writeflag, void *extra) |
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{ |
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uint64_t idata = 0, odata = 0; |
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int i; |
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struct gt_data *d = extra; |
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idata = memory_readmax64(cpu, data, len); |
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switch (relative_addr) { |
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case 0xc18: |
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if (writeflag == MEM_WRITE) { |
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debug("[ gt write to 0xc18: data = 0x%08lx ]\n", |
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(long)idata); |
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return 1; |
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} else { |
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odata = 0xffffffffULL; |
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/* ??? interrupt something... */ |
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odata = 0x00000100; /* netbsd/cobalt cobalt/machdep.c:cpu_intr() */ |
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cpu_interrupt_ack(cpu, d->irqnr); |
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debug("[ gt read from 0xc18 (data = 0x%08lx) ]\n", |
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(long)odata); |
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} |
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break; |
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case 0xcf8: /* PCI ADDR */ |
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case 0xcfc: /* PCI DATA */ |
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if (writeflag == MEM_WRITE) { |
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bus_pci_access(cpu, mem, relative_addr, &idata, |
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writeflag, d->pci_data); |
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} else { |
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bus_pci_access(cpu, mem, relative_addr, &odata, |
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writeflag, d->pci_data); |
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} |
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break; |
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default: |
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if (writeflag==MEM_READ) { |
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debug("[ gt read from addr 0x%x ]\n", |
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(int)relative_addr); |
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odata = d->reg[relative_addr]; |
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} else { |
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debug("[ gt write to addr 0x%x:", (int)relative_addr); |
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for (i=0; i<len; i++) |
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debug(" %02x", data[i]); |
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debug(" ]\n"); |
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d->reg[relative_addr] = idata; |
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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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* pci_gt_rr(): |
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*/ |
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uint32_t pci_gt_rr(int reg) |
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{ |
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switch (reg) { |
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case 0x00: |
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return PCI_VENDOR_GALILEO + (PCI_PRODUCT_GALILEO_GT64011 << 16); |
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case 0x08: |
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return 0x01; /* Revision 1 */ |
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default: |
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return 0; |
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} |
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} |
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/* |
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* pci_gt_init(): |
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*/ |
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void pci_gt_init(struct machine *machine, struct memory *mem) |
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{ |
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} |
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/* |
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* dev_gt_init(): |
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* |
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* Initialize a GT device. Return a pointer to the pci_data used, so that |
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* the caller may add PCI devices. First, however, we add the GT device |
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* itself. |
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*/ |
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struct pci_data *dev_gt_init(struct machine *machine, struct memory *mem, |
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uint64_t baseaddr, int irq_nr, int pciirq) |
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{ |
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struct gt_data *d; |
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d = malloc(sizeof(struct gt_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 gt_data)); |
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d->irqnr = irq_nr; |
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d->pciirq = pciirq; |
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d->pci_data = bus_pci_init(pciirq); |
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/* |
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* According to NetBSD/cobalt: |
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* pchb0 at pci0 dev 0 function 0: Galileo GT-64011 |
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* System Controller, rev 1 |
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*/ |
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bus_pci_add(machine, d->pci_data, mem, 0, 0, 0, pci_gt_init, pci_gt_rr); |
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memory_device_register(mem, "gt", baseaddr, DEV_GT_LENGTH, |
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dev_gt_access, d, MEM_DEFAULT, NULL); |
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machine_add_tickfunction(machine, dev_gt_tick, d, TICK_STEPS_SHIFT); |
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return d->pci_data; |
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} |
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