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comparison packages/hal/arm/sa11x0/cerf/current/include/plf_mmap.h @ 208:e0c0827131d1 ecos

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Merge from eCos master repository on 2002-05-20-20:11:54-BST
author jlarmour
date Mon, 20 May 2002 22:19:26 +0000
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children d2c90368aeef
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207:74c807ddde34 208:e0c0827131d1
1 #ifndef CYGONCE_HAL_SA11X0_PLATFORM_PLF_MMAP_H
2 #define CYGONCE_HAL_SA11X0_PLATFORM_PLF_MMAP_H
3 /*=============================================================================
4 //
5 // plf_mmap.h
6 //
7 // Platform specific memory map support
8 //
9 //=============================================================================
10 //####ECOSGPLCOPYRIGHTBEGIN####
11 // -------------------------------------------
12 // This file is part of eCos, the Embedded Configurable Operating System.
13 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
14 //
15 // eCos is free software; you can redistribute it and/or modify it under
16 // the terms of the GNU General Public License as published by the Free
17 // Software Foundation; either version 2 or (at your option) any later version.
18 //
19 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
20 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
21 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
22 // for more details.
23 //
24 // You should have received a copy of the GNU General Public License along
25 // with eCos; if not, write to the Free Software Foundation, Inc.,
26 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
27 //
28 // As a special exception, if other files instantiate templates or use macros
29 // or inline functions from this file, or you compile this file and link it
30 // with other works to produce a work based on this file, this file does not
31 // by itself cause the resulting work to be covered by the GNU General Public
32 // License. However the source code for this file must still be made available
33 // in accordance with section (3) of the GNU General Public License.
34 //
35 // This exception does not invalidate any other reasons why a work based on
36 // this file might be covered by the GNU General Public License.
37 //
38 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
39 // at http://sources.redhat.com/ecos/ecos-license
40 // -------------------------------------------
41 //####ECOSGPLCOPYRIGHTEND####
42 //=============================================================================
43 //#####DESCRIPTIONBEGIN####
44 //
45 // Author(s): hmt
46 // Contributors: hmt
47 // Date: 2001-01-04
48 // Purpose: Intel SA11x0 series platform-specific memory mapping macros
49 // Description: Macros to convert a cached, virtual address to
50 // 1) an uncached adddress for the same memory (if available)
51 // 2) the equivalent physical address for giving to external
52 // hardware eg. DMA engines.
53 //
54 // NB: this mapping is expressed here statically, independent
55 // of the actual mapping installed in the MMAP table. So if
56 // someone changes that, or its initialisation is changed,
57 // then this module must change. This is intended to be
58 // efficient at a cost of generality. It is also intended to
59 // be called with constants (such as &my_struct) as input
60 // args, so that all the work can be done at compile time,
61 // with optimization on.
62 //
63 // Usage: #include <cyg/hal/hal_cache.h>
64 // (which includes this file itself)
65 //
66 //####DESCRIPTIONEND####
67 //
68 //===========================================================================*/
69
70 #include <cyg/hal/hal_misc.h>
71
72 // Get the pagesize for a particular virtual address:
73
74 // This does not depend on the vaddr.
75 #define HAL_MM_PAGESIZE( vaddr, pagesize ) CYG_MACRO_START \
76 (pagesize) = SZ_1M; \
77 CYG_MACRO_END
78
79 // Get the physical address from a virtual address:
80
81 // Only RAM and ROM are mapped; we just pass through all other values,
82 // rather than detecting nonexistent areas here.
83
84 #define HAL_VIRT_TO_PHYS_ADDRESS( vaddr, paddr ) CYG_MACRO_START \
85 cyg_uint32 _v_ = (cyg_uint32)(vaddr); \
86 if ( 32 * SZ_1M > _v_ ) /* 32Mb of SDRAM Bank 0 from 0-32Mb */ \
87 _v_ += 0xc00u * SZ_1M; \
88 else if ( 0x500u * SZ_1M > _v_ ) /* Space between RAM and mapped ROM */\
89 /* no change */ ; \
90 else if ( 0x520u * SZ_1M > _v_ ) /* Mapped boot ROM size 32Mb */ \
91 _v_ -= 0x500u * SZ_1M; \
92 else if ( 0xf00u * SZ_1M > _v_ ) /* Space between ROM and mapped I/O */\
93 /* no change */ ; \
94 else if ( 0xf10u * SZ_1M > _v_ ) /* Mapped I/O size 16Mb */ \
95 _v_ = (_v_ - 0xf00u * SZ_1M) + (0x080u * SZ_1M); \
96 else /* Rest of it */ \
97 /* no change */ ; \
98 (paddr) = _v_; \
99 CYG_MACRO_END
100
101 // Get the virtual address for a physical address:
102
103 // Only RAM and ROM are mapped; we just pass through all other values,
104 // rather than detecting nonexistent areas here.
105
106 #define HAL_PHYS_TO_VIRT_ADDRESS( paddr, vaddr ) CYG_MACRO_START \
107 cyg_uint32 _p_ = (cyg_uint32)(paddr); \
108 if ( 32 * SZ_1M > _p_ ) /* 32Mb Boot ROM mapped to 0x500Mb */ \
109 _p_ += 0x500u * SZ_1M; \
110 else if ( 0x080u * SZ_1M > _p_ ) /* Space between ROM and I/O */ \
111 /* no change */ ; \
112 else if ( 0x090u * SZ_1M > _p_ ) /* I/O size 16Mb */ \
113 _p_ = (_p_ - 0x080u * SZ_1M) + (0xf00u * SZ_1M); \
114 else if ( 0xc00u * SZ_1M > _p_ ) /* Space between I/O and SDRAM */ \
115 /* no change */ ; \
116 else if ( 0xc20u * SZ_1M > _p_ ) /* Raw RAM size 32Mb */ \
117 _p_ -= 0xc00u * SZ_1M; \
118 else /* Rest of it */ \
119 /* no change */ ; \
120 (vaddr) = _p_ ; \
121 CYG_MACRO_END
122
123 // Get a non-cacheable address for accessing the same store as a virtual
124 // (assumed cachable) address:
125
126 // Only RAM is mapped: ROM is only available cachable, everything else is
127 // not cachable anyway.
128
129 #define HAL_VIRT_TO_UNCACHED_ADDRESS( vaddr, uaddr ) CYG_MACRO_START \
130 cyg_uint32 _v_ = (cyg_uint32)(vaddr); \
131 if ( 32 * SZ_1M > _v_ ) /* 32Mb of SDRAM Bank 0 from 0-32Mb */ \
132 _v_ += 0xc00u * SZ_1M; \
133 else /* Everything else is already uncacheable or is ROM */ \
134 /* no change */ ; \
135 (uaddr) = _v_ ; \
136 CYG_MACRO_END
137
138 //---------------------------------------------------------------------------
139 #endif // CYGONCE_HAL_SA11X0_PLATFORM_PLF_MMAP_H
140 // EOF plf_mmap.h