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| author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2010-08-31 04:05:28 +0000 |
|---|---|---|
| committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2010-08-31 04:05:28 +0000 |
| commit | c29904c8d42b2ca273cbb1d7e6990453ce14d2e9 (patch) | |
| tree | 47eaa85752b91e38138bdf58a30d243bd492a035 /nuttx/arch/arm/src/lpc313x | |
| parent | ad3e797c6fe0a8a3841aff26818ff312774118d3 (diff) | |
| download | px4-nuttx-c29904c8d42b2ca273cbb1d7e6990453ce14d2e9.tar.gz px4-nuttx-c29904c8d42b2ca273cbb1d7e6990453ce14d2e9.tar.bz2 px4-nuttx-c29904c8d42b2ca273cbb1d7e6990453ce14d2e9.zip | |
Fix page table size calculation
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2901 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/arch/arm/src/lpc313x')
| -rwxr-xr-x | nuttx/arch/arm/src/lpc313x/lpc313x_memorymap.h | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/nuttx/arch/arm/src/lpc313x/lpc313x_memorymap.h b/nuttx/arch/arm/src/lpc313x/lpc313x_memorymap.h index 06773ff0a..d7989870d 100755 --- a/nuttx/arch/arm/src/lpc313x/lpc313x_memorymap.h +++ b/nuttx/arch/arm/src/lpc313x/lpc313x_memorymap.h @@ -319,6 +319,8 @@ /* 16Kb of memory is reserved hold the page table for the virtual mappings. A * portion of this table is not accessible in the virtual address space (for * normal operation). We will reuse this memory for coarse page tables as follows: + * + * Page table start addresses: */ #define PGTABLE_L2_COARSE_OFFSET ((((LPC313X_LAST_PSECTION >> 20) + 255) & ~255) << 2) @@ -329,14 +331,20 @@ #define PGTABLE_L2_FINE_PBASE (PGTABLE_BASE_PADDR+PGTABLE_L2_FINE_OFFSET) #define PGTABLE_L2_FINE_VBASE (PGTABLE_BASE_VADDR+PGTABLE_L2_FINE_OFFSET) +/* Page table end addresses: */ + #define PGTABLE_L2_END_PADDR (PGTABLE_BASE_PADDR+PGTABLE_SIZE) #define PGTABLE_L2_END_VADDR (PGTABLE_BASE_VADDR+PGTABLE_SIZE) -#define PGTABLE_L2_ALLOC (PGTABLE_L2_END_VADDR-PGTABLE_L2_BASE_VADDR) +/* Page table sizes */ + +#define PGTABLE_L2_COARSE_ALLOC (PGTABLE_L2_END_VADDR-PGTABLE_L2_COARSE_VBASE) #define PGTABLE_COARSE_TABLE_SIZE (4*256) -#define PGTABLE_NCOARSE_TABLES (PGTABLE_L2_ALLOC / PGTABLE_COARSE_TABLE_SIZE) +#define PGTABLE_NCOARSE_TABLES (PGTABLE_L2_COARSE_ALLOC / PGTABLE_COARSE_TABLE_SIZE) + +#define PGTABLE_L2_FINE_ALLOC (PGTABLE_L2_END_VADDR-PGTABLE_L2_FINE_VBASE) #define PGTABLE_FINE_TABLE_SIZE (4*1024) -#define PGTABLE_NFINE_TABLES (PGTABLE_L2_ALLOC / PGTABLE_FINE_TABLE_SIZE) +#define PGTABLE_NFINE_TABLES (PGTABLE_L2_FINE_ALLOC / PGTABLE_FINE_TABLE_SIZE) /* Determine the base address of the vector table: * |