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 virtual void accepted();
  43
  44                 inline unsigned int get_devclass() const;
  45                 inline unsigned int get_devid() const;
  46         };
  47
  48         class pci : public bus {
  49         private:
  50                 int dev_count;
  51
  52                 static const int max_pci_buses;
  53                 static const int max_pci_devs;
  54                 static const int max_pci_funcs;
  55
  56                 static int start_io;
  57
  58                 static const int free_irqs[];
  59                 static int last_irq;
  60
  61         protected:
  62                 unsigned int get_conf(int bus, int dev, int func, int dword) const;
  63                 void set_conf(int bus, int dev, int func, int dword, int value);
  64                 bool dev_exist(int bus, int dev, int func);
  65                 int allocate_irq();
  66                 int allocate_io(int bar);
  67
  68                 void device_found(int, int, int);
  69                 int scan_bus();
  70
  71         public:
  72                 void alloc_resources(p<pci_did> id);
  73
  74                 bool initialize();
  75                 bool type_added(manes::cds::component_name);
  76
  77                 int get_count();
  78
  79                 unsigned int get_devclass(p<did>) const;
  80                 unsigned int get_devid(p<did>) const;
  81
  82                 static void register_type();
  83         };
  84
  85         unsigned int pci_did::get_devclass() const {
  86                 return get_bus().cast<pci>()->get_devclass((did*)this);
  87         }
  88
  89         unsigned int pci_did::get_devid() const {
  90                 return get_bus().cast<pci>()->get_devid((did*)this);
  91         }
  92
  93         void pci_did::accepted() {
  94                 get_bus().cast<pci>()->alloc_resources(this);
  95         }
  96 }
  97
  98 #endif