diff options
Diffstat (limited to 'Documentation/arm64/memory.txt')
| -rw-r--r-- | Documentation/arm64/memory.txt | 29 |
1 files changed, 27 insertions, 2 deletions
diff --git a/Documentation/arm64/memory.txt b/Documentation/arm64/memory.txt index 78a377124ef0..5e054bfe4dde 100644 --- a/Documentation/arm64/memory.txt +++ b/Documentation/arm64/memory.txt @@ -21,7 +21,7 @@ The swapper_pgd_dir address is written to TTBR1 and never written to TTBR0. -AArch64 Linux memory layout: +AArch64 Linux memory layout with 4KB pages: Start End Size Use ----------------------------------------------------------------------- @@ -39,13 +39,38 @@ ffffffbffbc00000 ffffffbffbdfffff 2MB earlyprintk device ffffffbffbe00000 ffffffbffbe0ffff 64KB PCI I/O space -ffffffbbffff0000 ffffffbcffffffff ~2MB [guard] +ffffffbffbe10000 ffffffbcffffffff ~2MB [guard] ffffffbffc000000 ffffffbfffffffff 64MB modules ffffffc000000000 ffffffffffffffff 256GB kernel logical memory map +AArch64 Linux memory layout with 64KB pages: + +Start End Size Use +----------------------------------------------------------------------- +0000000000000000 000003ffffffffff 4TB user + +fffffc0000000000 fffffdfbfffeffff ~2TB vmalloc + +fffffdfbffff0000 fffffdfbffffffff 64KB [guard page] + +fffffdfc00000000 fffffdfdffffffff 8GB vmemmap + +fffffdfe00000000 fffffdfffbbfffff ~8GB [guard, future vmmemap] + +fffffdfffbc00000 fffffdfffbdfffff 2MB earlyprintk device + +fffffdfffbe00000 fffffdfffbe0ffff 64KB PCI I/O space + +fffffdfffbe10000 fffffdfffbffffff ~2MB [guard] + +fffffdfffc000000 fffffdffffffffff 64MB modules + +fffffe0000000000 ffffffffffffffff 2TB kernel logical memory map + + Translation table lookup with 4KB pages: +--------+--------+--------+--------+--------+--------+--------+--------+ |