vhw.h

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/*****************************************************************************/
/*
 * (c) 2008-2009 Adam Lackorzynski <adam@os.inf.tu-dresden.de>,
 *               Alexander Warg <warg@os.inf.tu-dresden.de>
 *     economic rights: Technische Universität Dresden (Germany)
 *
 * This file is part of TUD:OS and distributed under the terms of the
 * GNU General Public License 2.
 * Please see the COPYING-GPL-2 file for details.
 *
 * As a special exception, you may use this file as part of a free software
 * library without restriction.  Specifically, if other files instantiate
 * templates or use macros or inline functions from this file, or you compile
 * this file and link it with other files to produce an executable, this
 * file does not by itself cause the resulting executable to be covered by
 * the GNU General Public License.  This exception does not however
 * invalidate any other reasons why the executable file might be covered by
 * the GNU General Public License.
 */
/*****************************************************************************/
#ifndef _L4_SYS_VHW_H
#define _L4_SYS_VHW_H
 
#include <l4/sys/types.h>
#include <l4/sys/kip.h>
 
enum l4_vhw_entry_type {
  L4_TYPE_VHW_NONE,                        
  L4_TYPE_VHW_FRAMEBUFFER,                 
  L4_TYPE_VHW_INPUT,                       
  L4_TYPE_VHW_NET,                         
};
 
struct l4_vhw_entry {
  enum l4_vhw_entry_type type;             
  l4_uint32_t            provider_pid;     
  l4_addr_t              mem_start;        
  l4_addr_t              mem_size;         
  l4_uint32_t            irq_no;           
  l4_uint32_t            fd;               
};
 
struct l4_vhw_descriptor {
  l4_uint32_t magic;                       
  l4_uint8_t  version;                     
  l4_uint8_t  count;                       
  l4_uint8_t  pad1;                        
  l4_uint8_t  pad2;                        
  struct l4_vhw_entry descs[];             
};
 
enum {
  L4_VHW_MAGIC = 0x56687765,
};
 
static inline struct l4_vhw_descriptor *
l4_vhw_get(l4_kernel_info_t const *kip) L4_NOTHROW
{
  struct l4_vhw_descriptor *v
    = (struct l4_vhw_descriptor *)(((unsigned long)kip) + kip->vhw_offset);
 
  if (v->magic == L4_VHW_MAGIC)
    return v;
 
  return NULL;
}
 
static inline struct l4_vhw_entry *
l4_vhw_get_entry(struct l4_vhw_descriptor *v, int entry) L4_NOTHROW
{
  return v->descs + entry;
}
 
static inline struct l4_vhw_entry *
l4_vhw_get_entry_type(struct l4_vhw_descriptor *v, enum l4_vhw_entry_type t) L4_NOTHROW
{
  int i;
  struct l4_vhw_entry *e = v->descs;
 
  for (i = 0; i < v->count; i++, e++)
    if (e->type == t)
      return e;
 
  return NULL;
}
 
#endif /* ! _L4_SYS_VHW_H */