1 #ifndef CYGONCE_HAL_PXA250_PLATFORM_PLF_MMAP_H
2 #define CYGONCE_HAL_PXA250_PLATFORM_PLF_MMAP_H
3 /*=============================================================================
4 //####ECOSGPLCOPYRIGHTBEGIN####
5 // -------------------------------------------
6 // This file is part of eCos, the Embedded Configurable Operating System.
7 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
8 // Copyright (C) 2003 Gary Thomas <gary@mind.be>
10 // eCos is free software; you can redistribute it and/or modify it under
11 // the terms of the GNU General Public License as published by the Free
12 // Software Foundation; either version 2 or (at your option) any later version.
14 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
15 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
16 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
19 // You should have received a copy of the GNU General Public License along
20 // with eCos; if not, write to the Free Software Foundation, Inc.,
21 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
23 // As a special exception, if other files instantiate templates or use macros
24 // or inline functions from this file, or you compile this file and link it
25 // with other works to produce a work based on this file, this file does not
26 // by itself cause the resulting work to be covered by the GNU General Public
27 // License. However the source code for this file must still be made available
28 // in accordance with section (3) of the GNU General Public License.
30 // This exception does not invalidate any other reasons why a work based on
31 // this file might be covered by the GNU General Public License.
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34 // at http://sources.redhat.com/ecos/ecos-license/
35 // -------------------------------------------
36 //####ECOSGPLCOPYRIGHTEND####
37 //=============================================================================
38 //#####DESCRIPTIONBEGIN####
43 // Purpose: Intel PXA250 series platform-specific memory mapping macros
44 // Description: Macros to convert a cached, virtual address to
45 // 1) an uncached adddress for the same memory (if available)
46 // 2) the equivalent physical address for giving to external
47 // hardware eg. DMA engines.
49 // NB: this mapping is expressed here statically, independent
50 // of the actual mapping installed in the MMAP table. So if
51 // someone changes that, or its initialisation is changed,
52 // then this module must change. This is intended to be
53 // efficient at a cost of generality. It is also intended to
54 // be called with constants (such as &my_struct) as input
55 // args, so that all the work can be done at compile time,
56 // with optimization on.
58 // Usage: #include <cyg/hal/hal_cache.h>
59 // (which includes this file itself)
61 //####DESCRIPTIONEND####
63 //===========================================================================*/
65 #include <cyg/hal/hal_misc.h>
67 // Get the pagesize for a particular virtual address:
69 // This does not depend on the vaddr.
70 #define HAL_MM_PAGESIZE( vaddr, pagesize ) CYG_MACRO_START \
74 // Get the physical address from a virtual address:
76 // Only RAM and ROM are mapped; we just pass through all other values,
77 // rather than detecting nonexistent areas here.
79 #define HAL_VIRT_TO_PHYS_ADDRESS( vaddr, paddr ) CYG_MACRO_START \
80 cyg_uint32 _v_ = (cyg_uint32)(vaddr); \
81 if ( 64 * SZ_1M > _v_ ) /* 64Mb of SDRAM Bank 0 from 0-32Mb */ \
82 _v_ += 0xa00u * SZ_1M; \
83 else if ( 0x500u * SZ_1M > _v_ ) /* Space between RAM and mapped ROM */\
85 else if ( 0x520u * SZ_1M > _v_ ) /* Mapped boot ROM size 32Mb */ \
86 _v_ -= 0x500u * SZ_1M; \
87 else /* Rest of it */ \
92 // Get the virtual address for a physical address:
94 // Only RAM and ROM are mapped; we just pass through all other values,
95 // rather than detecting nonexistent areas here.
97 #define HAL_PHYS_TO_VIRT_ADDRESS( paddr, vaddr ) CYG_MACRO_START \
98 cyg_uint32 _p_ = (cyg_uint32)(paddr); \
99 if ( 32 * SZ_1M > _p_ ) /* 32Mb Boot ROM mapped to 0x500Mb */ \
100 _p_ += 0x500u * SZ_1M; \
101 else if ( 0xa00u * SZ_1M > _p_ ) /* Space between ROM and SDRAM */ \
103 else if ( 0xa40u * SZ_1M > _p_ ) /* Raw RAM size 64Mb */ \
104 _p_ -= 0xa00u * SZ_1M; \
105 else /* Rest of it */ \
110 // Get a non-cacheable address for accessing the same store as a virtual
111 // (assumed cachable) address:
113 // Only RAM is mapped: ROM is only available cachable, everything else is
114 // not cachable anyway.
116 #define HAL_VIRT_TO_UNCACHED_ADDRESS( vaddr, uaddr ) CYG_MACRO_START \
117 cyg_uint32 _v_ = (cyg_uint32)(vaddr); \
118 if ( 64 * SZ_1M > _v_ ) /* 64Mb of SDRAM Bank 0 from 0-64Mb */ \
119 _v_ += 0xc00u * SZ_1M; \
120 else /* Everything else is already uncacheable or is ROM */ \
125 //---------------------------------------------------------------------------
126 #endif // CYGONCE_HAL_SA11X0_PLATFORM_PLF_MMAP_H