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#ifndef CYGONCE_HAL_MEM_H
#define CYGONCE_HAL_MEM_H
 
//=============================================================================
//
//      hal_mem.h
//
//      HAL memory control API
//
//=============================================================================
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//
// As a special exception, if other files instantiate templates or use      
// macros or inline functions from this file, or you compile this file      
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// General Public License v2.                                               
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//=============================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):   nickg
// Contributors:nickg, jskov, hmt
// Date:        2000-02-11
// Purpose:     Memory control API
// Description: The macros defined here provide the HAL APIs for handling
//              simple memory management operations.
// Usage:
//              #include <cyg/hal/hal_mem.h>
//              ...
//              
//
//####DESCRIPTIONEND####
//
//=============================================================================
 
#include <pkgconf/hal.h>
#include <cyg/infra/cyg_type.h>
 
//=============================================================================
// Memory mapping
typedef struct {
    CYG_ADDRESS  virtual_addr;
    CYG_ADDRESS  physical_addr;
    cyg_int32    size;
    cyg_uint8    flags;
} cyg_memdesc_t;
 
// each variant HAL must provide these functions for mapping/clearing
// (simple BAT/TLB) memory mappings.
externC int
cyg_hal_map_memory (int id,CYG_ADDRESS virt, CYG_ADDRESS phys, 
                    cyg_int32 size, cyg_uint8 flags);
externC void
cyg_hal_clear_MMU (void);
 
// each platform HAL must provide one of these to describe how memory
// should be mapped/cached, ideally weak aliased so that apps can override:
externC cyg_memdesc_t cyg_hal_mem_map[];
 
#define CYGARC_MEMDESC_CI       1       // cache inhibit
#define CYGARC_MEMDESC_GUARDED  2       // guarded
 
// these macros should ease that task, and ease any future extension of the
// structure (physical == virtual addresses):
#define CYGARC_MEMDESC_CACHE( _va_, _sz_ ) \
        { (_va_), (_va_), (_sz_), 0 }
 
#define CYGARC_MEMDESC_NOCACHE( _va_, _sz_ ) \
        { (_va_), (_va_), (_sz_), CYGARC_MEMDESC_CI }
 
#define CYGARC_MEMDESC_NOCACHE_PA( _va_, _pa_, _sz_ ) \
        { (_va_), (_pa_), (_sz_), CYGARC_MEMDESC_CI }
 
#define CYGARC_MEMDESC_CACHEGUARD( _va_, _sz_ ) \
        { (_va_), (_va_), (_sz_), CYGARC_MEMDESC_GUARDED }
 
#define CYGARC_MEMDESC_NOCACHEGUARD( _va_, _sz_ ) \
        { (_va_), (_va_), (_sz_), CYGARC_MEMDESC_GUARDED|CYGARC_MEMDESC_CI }
 
#define CYGARC_MEMDESC_TABLE_END      {0, 0, 0, 0}
#define CYGARC_MEMDESC_TABLE          cyg_memdesc_t cyg_hal_mem_map[]
#define CYGARC_MEMDESC_EMPTY_TABLE    { CYGARC_MEMDESC_TABLE_END }
 
//-----------------------------------------------------------------------------
#endif // ifndef CYGONCE_HAL_MEM_H
// End of hal_mem.h