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phoenix |
#ifndef CYGONCE_HAL_SA11X0_PLATFORM_PLF_MMAP_H
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#define CYGONCE_HAL_SA11X0_PLATFORM_PLF_MMAP_H
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/*=============================================================================
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//
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// plf_mmap.h
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//
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// Platform specific memory map support
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//
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//=============================================================================
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//####ECOSGPLCOPYRIGHTBEGIN####
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// -------------------------------------------
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// This file is part of eCos, the Embedded Configurable Operating System.
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// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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//
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// eCos is free software; you can redistribute it and/or modify it under
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// the terms of the GNU General Public License as published by the Free
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// Software Foundation; either version 2 or (at your option) any later version.
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//
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// eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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// WARRANTY; without even the implied warranty of MERCHANTABILITY or
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// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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// for more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with eCos; if not, write to the Free Software Foundation, Inc.,
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// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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//
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// As a special exception, if other files instantiate templates or use macros
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// or inline functions from this file, or you compile this file and link it
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// with other works to produce a work based on this file, this file does not
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// by itself cause the resulting work to be covered by the GNU General Public
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// License. However the source code for this file must still be made available
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// in accordance with section (3) of the GNU General Public License.
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//
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// This exception does not invalidate any other reasons why a work based on
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// this file might be covered by the GNU General Public License.
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//
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// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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// at http://sources.redhat.com/ecos/ecos-license/
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// -------------------------------------------
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//####ECOSGPLCOPYRIGHTEND####
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//=============================================================================
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//#####DESCRIPTIONBEGIN####
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//
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// Author(s): hmt
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// Contributors: hmt
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// Date: 2001-01-04
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// Purpose: Intel SA11x0 series platform-specific memory mapping macros
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// Description: Macros to convert a cached, virtual address to
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// 1) an uncached adddress for the same memory (if available)
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// 2) the equivalent physical address for giving to external
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// hardware eg. DMA engines.
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//
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// NB: this mapping is expressed here statically, independent
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// of the actual mapping installed in the MMAP table. So if
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// someone changes that, or its initialisation is changed,
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// then this module must change. This is intended to be
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// efficient at a cost of generality. It is also intended to
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// be called with constants (such as &my_struct) as input
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// args, so that all the work can be done at compile time,
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// with optimization on.
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//
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// Usage: #include <cyg/hal/hal_cache.h>
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// (which includes this file itself)
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//
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//####DESCRIPTIONEND####
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//
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//===========================================================================*/
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#include <cyg/hal/hal_misc.h>
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// Get the pagesize for a particular virtual address:
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// This does not depend on the vaddr.
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#define HAL_MM_PAGESIZE( vaddr, pagesize ) CYG_MACRO_START \
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(pagesize) = SZ_1M; \
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CYG_MACRO_END
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// Get the physical address from a virtual address:
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// Only RAM and ROM are mapped; we just pass through all other values,
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// rather than detecting nonexistent areas here.
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#define HAL_VIRT_TO_PHYS_ADDRESS( vaddr, paddr ) CYG_MACRO_START \
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cyg_uint32 _v_ = (cyg_uint32)(vaddr); \
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if ( 32 * SZ_1M > _v_ ) /* 32Mb of SDRAM Bank 0 from 0-32Mb */ \
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_v_ += 0xc00u * SZ_1M; \
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else if ( 0x500u * SZ_1M > _v_ ) /* Space between RAM and mapped ROM */\
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/* no change */ ; \
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else if ( 0x520u * SZ_1M > _v_ ) /* Mapped boot ROM size 32Mb */ \
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_v_ -= 0x500u * SZ_1M; \
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else /* Rest of it */ \
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/* no change */ ; \
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(paddr) = _v_; \
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CYG_MACRO_END
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// Get the virtual address for a physical address:
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// Only RAM and ROM are mapped; we just pass through all other values,
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// rather than detecting nonexistent areas here.
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#define HAL_PHYS_TO_VIRT_ADDRESS( paddr, vaddr ) CYG_MACRO_START \
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cyg_uint32 _p_ = (cyg_uint32)(paddr); \
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if ( 32 * SZ_1M > _p_ ) /* 32Mb Boot ROM mapped to 0x500Mb */ \
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_p_ += 0x500u * SZ_1M; \
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else if ( 0xc00u * SZ_1M > _p_ ) /* Space between ROM and SDRAM */ \
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/* no change */ ; \
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else if ( 0xc20u * SZ_1M > _p_ ) /* Raw RAM size 32Mb */ \
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_p_ -= 0xc00u * SZ_1M; \
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else /* Rest of it */ \
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/* no change */ ; \
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(vaddr) = _p_ ; \
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CYG_MACRO_END
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// Get a non-cacheable address for accessing the same store as a virtual
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// (assumed cachable) address:
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// Only RAM is mapped: ROM is only available cachable, everything else is
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// not cachable anyway.
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#define HAL_VIRT_TO_UNCACHED_ADDRESS( vaddr, uaddr ) CYG_MACRO_START \
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cyg_uint32 _v_ = (cyg_uint32)(vaddr); \
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if ( 32 * SZ_1M > _v_ ) /* 32Mb of SDRAM Bank 0 from 0-32Mb */ \
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_v_ += 0xc00u * SZ_1M; \
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else /* Everything else is already uncacheable or is ROM */ \
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/* no change */ ; \
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(uaddr) = _v_ ; \
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CYG_MACRO_END
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//---------------------------------------------------------------------------
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#endif // CYGONCE_HAL_SA11X0_PLATFORM_PLF_MMAP_H
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// EOF plf_mmap.h
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