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new general headerfile for AGP use on graphicscards. If it shouldn't be here, let me know... Committing because it's needed now.

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git-svn-id: file:///srv/svn/repos/haiku/trunk/current@8123 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Rudolf Cornelissen 2004-06-22 11:07:03 +00:00
parent b9fda5e234
commit a83a917d79
1 changed files with 95 additions and 0 deletions
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95
headers/private/graphics/AGP.h Normal file
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/*******************************************************************************
/
/ File: AGP.h
/
/ Description: Interface to the AGP bus and driver.
/ For more information, see "AGP interface specification", Revision 2.0 and 3.0,
/ Intel Corporation, 1998-2002.
/
/ Rudolf Cornelissen 6/2004.
/
*******************************************************************************/
#if !defined(_AGP_H_)
#define _AGP_H_
#include <Drivers.h>
/* The API for driver access is C, not C++ */
#ifdef __cplusplus
extern "C" {
#endif
//driver IOCTRL argument:
typedef struct {
struct
{
ushort vendor_id, /* host bridge vendor id */
device_id; /* host bridge device id */
} dev;
struct
{
uint32 agp_cap_id, /* AGP capability register as defined in the AGP standard */
agp_stat, /* AGP STATUS register as defined in the AGP standard */
agp_cmd; /* AGP COMMAND register as defined in the AGP standard */
}config;
status_t status; /* hostbridge usability status (B_OK if usable, B_ERROR if it
* did not respond according to the AGP standard */
} agp_info;
//driver IOCTRL operation codes:
enum
{
GET_CONFIG = B_DEVICE_OP_CODES_END+20001,
SET_CONFIG,
};
/* ---
value for the AGP_id field in the agp_cap_id register
--- */
#define AGP_id 0x02 /* AGP device identification */
/* ---
masks for capability ID register bits
--- */
#define AGP_id_mask 0x000000ff /* AGP capability identification, contains value 0x02 for AGP device */
#define AGP_next_ptr 0x0000ff00 /* pointer to next item in PCI capabilities list, contains 0x00 if this is last item */
#define AGP_next_ptr_shift 8
#define AGP_rev_minor 0x000f0000 /* AGP Revision minor number reported */
#define AGP_rev_minor_shift 16
#define AGP_rev_major 0x00f00000 /* AGP Revision major number reported */
#define AGP_rev_major_shift 20
/* ---
masks for status and command register bits
--- */
#define AGP_2_1x 0x00000001 /* AGP Revision 2.0 1x speed transfer mode */
#define AGP_2_2x 0x00000002 /* AGP Revision 2.0 2x speed transfer mode */
#define AGP_2_4x 0x00000004 /* AGP Revision 2.0 4x speed transfer mode */
#define AGP_3_4x 0x00000001 /* AGP Revision 3.0 4x speed transfer mode */
#define AGP_3_8x 0x00000002 /* AGP Revision 3.0 8x speed transfer mode */
#define AGP_rates 0x00000007 /* mask for supported rates info */
#define AGP_rate_rev 0x00000008 /* 0 if AGP Revision 2.0 or earlier rate scheme, 1 if AGP Revision 3.0 rate scheme */
#define AGP_FW 0x00000010 /* 1 if fastwrite transfers supported */
#define AGP_4G 0x00000020 /* 1 if adresses above 4G bytes supported */
#define AGP_SBA 0x00000200 /* 1 if sideband adressing supported */
#define AGP_RQ 0xff000000 /* max. number of enqueued AGP command requests supported, minus one */
#define AGP_RQ_shift 24
/* ---
masks for command register bits
--- */
#define AGP_enable 0x00000100 /* set to 1 if AGP should be enabled */
#ifdef __cplusplus
}
#endif
#endif