1 /***************************************************************************\
2 |*                                                                           *|
3 |*       Copyright 1993-2003 NVIDIA, Corporation.  All rights reserved.      *|
4 |*                                                                           *|
5 |*     NOTICE TO USER:   The source code  is copyrighted under  U.S. and     *|
6 |*     international laws.  Users and possessors of this source code are     *|
7 |*     hereby granted a nonexclusive,  royalty-free copyright license to     *|
8 |*     use this code in individual and commercial software.                  *|
9 |*                                                                           *|
10 |*     Any use of this source code must include,  in the user documenta-     *|
11 |*     tion and  internal comments to the code,  notices to the end user     *|
12 |*     as follows:                                                           *|
13 |*                                                                           *|
14 |*       Copyright 1993-1999 NVIDIA, Corporation.  All rights reserved.      *|
15 |*                                                                           *|
16 |*     NVIDIA, CORPORATION MAKES NO REPRESENTATION ABOUT THE SUITABILITY     *|
17 |*     OF  THIS SOURCE  CODE  FOR ANY PURPOSE.  IT IS  PROVIDED  "AS IS"     *|
18 |*     WITHOUT EXPRESS OR IMPLIED WARRANTY OF ANY KIND.  NVIDIA, CORPOR-     *|
19 |*     ATION DISCLAIMS ALL WARRANTIES  WITH REGARD  TO THIS SOURCE CODE,     *|
20 |*     INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGE-     *|
21 |*     MENT,  AND FITNESS  FOR A PARTICULAR PURPOSE.   IN NO EVENT SHALL     *|
22 |*     NVIDIA, CORPORATION  BE LIABLE FOR ANY SPECIAL,  INDIRECT,  INCI-     *|
23 |*     DENTAL, OR CONSEQUENTIAL DAMAGES,  OR ANY DAMAGES  WHATSOEVER RE-     *|
24 |*     SULTING FROM LOSS OF USE,  DATA OR PROFITS,  WHETHER IN AN ACTION     *|
25 |*     OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,  ARISING OUT OF     *|
26 |*     OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOURCE CODE.     *|
27 |*                                                                           *|
28 |*     U.S. Government  End  Users.   This source code  is a "commercial     *|
29 |*     item,"  as that  term is  defined at  48 C.F.R. 2.101 (OCT 1995),     *|
30 |*     consisting  of "commercial  computer  software"  and  "commercial     *|
31 |*     computer  software  documentation,"  as such  terms  are  used in     *|
32 |*     48 C.F.R. 12.212 (SEPT 1995)  and is provided to the U.S. Govern-     *|
33 |*     ment only as  a commercial end item.   Consistent with  48 C.F.R.     *|
34 |*     12.212 and  48 C.F.R. 227.7202-1 through  227.7202-4 (JUNE 1995),     *|
35 |*     all U.S. Government End Users  acquire the source code  with only     *|
36 |*     those rights set forth herein.                                        *|
37 |*                                                                           *|
38  \***************************************************************************/
39 
40 /*
41  * GPL Licensing Note - According to Mark Vojkovich, author of the Xorg/
42  * XFree86 'nv' driver, this source code is provided under MIT-style licensing
43  * where the source code is provided "as is" without warranty of any kind.
44  * The only usage restriction is for the copyright notices to be retained
45  * whenever code is used.
46  *
47  * Antonino Daplas <adaplas@pol.net> 2005-03-11
48  */
49 
50 #ifndef __NV_LOCAL_H__
51 #define __NV_LOCAL_H__
52 
53 /*
54  * This file includes any environment or machine specific values to access the
55  * HW.  Put all affected includes, typdefs, etc. here so the riva_hw.* files
56  * can stay generic in nature.
57  */
58 
59 /*
60  * HW access macros.  These assume memory-mapped I/O, and not normal I/O space.
61  */
62 #define NV_WR08(p,i,d)  (__raw_writeb((d), (void __iomem *)(p) + (i)))
63 #define NV_RD08(p,i)    (__raw_readb((void __iomem *)(p) + (i)))
64 #define NV_WR16(p,i,d)  (__raw_writew((d), (void __iomem *)(p) + (i)))
65 #define NV_RD16(p,i)    (__raw_readw((void __iomem *)(p) + (i)))
66 #define NV_WR32(p,i,d)  (__raw_writel((d), (void __iomem *)(p) + (i)))
67 #define NV_RD32(p,i)    (__raw_readl((void __iomem *)(p) + (i)))
68 
69 /* VGA I/O is now always done through MMIO */
70 #define VGA_WR08(p,i,d) (writeb((d), (void __iomem *)(p) + (i)))
71 #define VGA_RD08(p,i)   (readb((void __iomem *)(p) + (i)))
72 
73 #define NVDmaNext(par, data) \
74      NV_WR32(&(par)->dmaBase[(par)->dmaCurrent++], 0, (data))
75 
76 #define NVDmaStart(info, par, tag, size) {    \
77      if((par)->dmaFree <= (size))             \
78         NVDmaWait(info, size);                \
79      NVDmaNext(par, ((size) << 18) | (tag));  \
80      (par)->dmaFree -= ((size) + 1);          \
81 }
82 
83 #if defined(__i386__)
84 #define _NV_FENCE() outb(0, 0x3D0);
85 #else
86 #define _NV_FENCE() mb();
87 #endif
88 
89 #define WRITE_PUT(par, data) {                   \
90   _NV_FENCE()                                    \
91   NV_RD08((par)->FbStart, 0);                    \
92   NV_WR32(&(par)->FIFO[0x0010], 0, (data) << 2); \
93   mb();                                          \
94 }
95 
96 #define READ_GET(par) (NV_RD32(&(par)->FIFO[0x0011], 0) >> 2)
97 
98 #ifdef __LITTLE_ENDIAN
99 
100 #include <linux/bitrev.h>
101 
102 #define reverse_order(l)        \
103 do {                            \
104 	u8 *a = (u8 *)(l);      \
105 	a[0] = bitrev8(a[0]);   \
106 	a[1] = bitrev8(a[1]);   \
107 	a[2] = bitrev8(a[2]);   \
108 	a[3] = bitrev8(a[3]);   \
109 } while(0)
110 #else
111 #define reverse_order(l) do { } while(0)
112 #endif                          /* __LITTLE_ENDIAN */
113 
114 #endif				/* __NV_LOCAL_H__ */
115