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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2868 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo
2010-08-19 12:57:16 +00:00
parent 9df7fba149
commit 4856091610
5 changed files with 270 additions and 25 deletions
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include/nuttx/page.h
+47 -9
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@@ -54,22 +54,60 @@
/* Configuration ************************************************************/
/* CONFIG_PAGING_PAGESIZE - The size of one managed page. This must be a
* value supported by the processor's memory management unit.
* CONFIG_PAGING_NLOCKED - This is the number of locked pages in the memory
* map. The locked address region will then be from:
* value supported by the processor's memory management unit. The
* following may need to be extended to support additional page sizes at
* some point.
*/
#define CONFIG_PAGING_LOCKEDBASE CONFIG_DRAM_VSTART
#define CONFIG_PAGING_LOCKEDSIZE (CONFIG_PAGING_PAGESIZE*CONFIG_PAGING_NLOCKED)
#define CONFIG_PAGING_LOCKEDEND (CONFIG_PAGING_LOCKEDBASE + CONFIG_PAGING_LOCKEDSIZE)
#if CONFIG_PAGING_PAGESIZE == 1024
# define PAGESIZE 1024
# define PAGESHIFT 10
# define PAGEMASK 0x000003ff
#elif CONFIG_PAGING_PAGESIZE == 4096
# define PAGESIZE 4096
# define PAGESHIFT 12
# define PAGEMASK 0x00000fff
#else
# error "Need extended definitions for CONFIG_PAGING_PAGESIZE"
#endif
/* Alignment macros */
#define PG_ALIGNDOWN(addr) ((addr) & ~PAGEMASK)
#define PG_ALIGNUP(addr) (((addr) + PAGEMASK) & ~PAGEMASK)
/* CONFIG_PAGING_NLOCKED - This is the number of locked pages in the memory
* map. The size of locked address region will then be:
*/
#define PG_LOCKEDSIZE (CONFIG_PAGING_NLOCKED << PAGESHIFT)
/* PG_LOCKEDBASE - May be defined to determine the base address
* of the locked page regions (lowest in memory). If PG_LOCKEDBASE
* is not defined, it will be set to CONFIG_DRAM_VSTART (i.e., assuming that
* the base address of the locked region is at the virtual address of the
* beginning of RAM).
*/
#ifdef CONFIG_PAGING_LOCKEDBASE
# define PG_LOCKEDBASE CONFIG_PAGING_LOCKEDBASE
#else
# define PG_LOCKEDBASE CONFIG_DRAM_VSTART
#endif
#define PG_LOCKEDEND (PG_LOCKEDBASE + PG_LOCKEDSIZE)
#if (PG_LOCKEDBASE & PAGEMASK) != 0
# error "Base address of the locked region is not page aligned"
#endif
/* CONFIG_PAGING_NPAGES - The number of pages in the paged region of the
* memory map. This paged region then begins and ends at:
*/
#define CONFIG_PAGING_PAGEDBASE CONFIG_PAGING_LOCKEDEND
#define CONFIG_PAGING_PAGEDSIZE (CONFIG_PAGING_PAGESIZE*CONFIG_PAGING_NPAGES)
#define CONFIG_PAGING_PAGEDEND (CONFIG_PAGING_PAGEDBASE + CONFIG_PAGING_PAGEDSIZE)
#define PG_PAGEDSIZE (CONFIG_PAGING_NPAGES << PAGESHIFT)
#define PG_PAGEDBASE PG_LOCKEDEND
#define PG_PAGEDEND (PG_PAGEDBASE + PG_PAGEDSIZE)
/* CONFIG_PAGING_DEFPRIO - The default, minimum priority of the page fill
* worker thread. The priority of the page fill work thread will be boosted