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| author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2010-09-01 21:28:14 +0000 |
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| committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2010-09-01 21:28:14 +0000 |
| commit | 8d91b3fa9d70252dbec1341af543e93ec7c32285 (patch) | |
| tree | 3480520dbd9ee8b32b7d8248dbad763e7ba013fd /nuttx/configs/ea3131/README.txt | |
| parent | 6a0c71965915af63afa7bafbcf9b26d37fd31ea7 (diff) | |
| download | px4-nuttx-8d91b3fa9d70252dbec1341af543e93ec7c32285.tar.gz px4-nuttx-8d91b3fa9d70252dbec1341af543e93ec7c32285.tar.bz2 px4-nuttx-8d91b3fa9d70252dbec1341af543e93ec7c32285.zip | |
Fix units used in page table address calculation
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2908 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/configs/ea3131/README.txt')
| -rwxr-xr-x | nuttx/configs/ea3131/README.txt | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/nuttx/configs/ea3131/README.txt b/nuttx/configs/ea3131/README.txt index f81270aae..28b8e8868 100755 --- a/nuttx/configs/ea3131/README.txt +++ b/nuttx/configs/ea3131/README.txt @@ -361,10 +361,17 @@ On-Demand Paging ... The locked region is initially unmapped. But the data region and page table - regions must be mapped in a similar manner. + regions must be mapped in a similar manner. Those - data offset = ((0x00094000 >> 10) << 2) = 0x00000940 - L1 offset = ((0x0009c000 >> 10) << 2) = 0x000009c0 + Data: + Virtual address = 0x11094000 Offset = 0x00064000 + Physical address = 0x1104c000 + L2 offset = ((0x00094000 >> 10) << 2) = 0x00000940 + + Page table: + Virtual address = 0x1109c000 Offset = 0x0009c000 + Physical address = 0x11054000 + L2 offset = ((0x0009c000 >> 10) << 2) = 0x000009c0 Build Sequence: --------------- |