resources/pci.h

   1 /* Quarn OS
   2  *
   3  * PCI bus
   4  *
   5  * Copyright (C) 2008-2009 Pawel Dziepak
   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 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 along
  18  * with this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  */
  22
  23 #ifndef _PCI_H_
  24 #define _PCI_H_
  25
  26 #include "bus.h"
  27 #include "did.h"
  28
  29 namespace resources {
  30
  31         class pci_did : public io_did {
  32         public:
  33                 int irq;
  34                 int dma_channel;
  35                 void *memory_base;
  36                 int ibus, device, function;
  37
  38                 pci_did(p<bus> b) : io_did(b) {}
  39                 pci_did() {}
  40                 virtual ~pci_did() {}
  41
  42                 inline unsigned int get_devclass() const;
  43                 inline unsigned int get_devid() const;
  44         };
  45
  46         class pci : public bus {
  47         private:
  48                 int dev_count;
  49
  50                 static const int max_pci_buses;
  51                 static const int max_pci_devs;
  52                 static const int max_pci_funcs;
  53
  54                 static int start_io;
  55
  56                 static const int free_irqs[];
  57                 static int last_irq;
  58
  59         protected:
  60                 unsigned int get_conf(int bus, int dev, int func, int dword) const;
  61                 void set_conf(int bus, int dev, int func, int dword, int value);
  62                 bool dev_exist(int bus, int dev, int func);
  63                 int allocate_irq();
  64                 int allocate_io(int bar);
  65
  66                 void device_found(int, int, int);
  67                 int scan_bus();
  68
  69         public:
  70                 pci_did alloc_resources(int bus, int dev, int func);
  71
  72                 bool initialize();
  73                 bool type_added(manes::cds::component_name);
  74
  75                 int get_count();
  76
  77                 unsigned int get_devclass(p<did>) const;
  78                 unsigned int get_devid(p<did>) const;
  79
  80                 static void register_type();
  81         };
  82
  83         unsigned int pci_did::get_devclass() const {
  84                 return get_bus().cast<pci>()->get_devclass((did*)this);
  85         }
  86
  87         unsigned int pci_did::get_devid() const {
  88                 return get_bus().cast<pci>()->get_devid((did*)this);
  89         }
  90 }
  91
  92 #endif