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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-06-10 05:30:17 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-06-10 05:30:17 -0300
commitd635711daa98be86d4c7fd01499c34f566b54ccb (patch)
treeaa5cc3760a27c3d57146498cb82fa549547de06c /Documentation/arm64
parentc91265cd0efb83778f015b4d4b1129bd2cfd075e (diff)
Linux-libre 4.6.2-gnu
Diffstat (limited to 'Documentation/arm64')
-rw-r--r--Documentation/arm64/booting.txt20
-rw-r--r--Documentation/arm64/silicon-errata.txt1
2 files changed, 14 insertions, 7 deletions
diff --git a/Documentation/arm64/booting.txt b/Documentation/arm64/booting.txt
index 701d39d31..56d6d8b79 100644
--- a/Documentation/arm64/booting.txt
+++ b/Documentation/arm64/booting.txt
@@ -109,7 +109,13 @@ Header notes:
1 - 4K
2 - 16K
3 - 64K
- Bits 3-63: Reserved.
+ Bit 3: Kernel physical placement
+ 0 - 2MB aligned base should be as close as possible
+ to the base of DRAM, since memory below it is not
+ accessible via the linear mapping
+ 1 - 2MB aligned base may be anywhere in physical
+ memory
+ Bits 4-63: Reserved.
- When image_size is zero, a bootloader should attempt to keep as much
memory as possible free for use by the kernel immediately after the
@@ -117,14 +123,14 @@ Header notes:
depending on selected features, and is effectively unbound.
The Image must be placed text_offset bytes from a 2MB aligned base
-address near the start of usable system RAM and called there. Memory
-below that base address is currently unusable by Linux, and therefore it
-is strongly recommended that this location is the start of system RAM.
-The region between the 2 MB aligned base address and the start of the
-image has no special significance to the kernel, and may be used for
-other purposes.
+address anywhere in usable system RAM and called there. The region
+between the 2 MB aligned base address and the start of the image has no
+special significance to the kernel, and may be used for other purposes.
At least image_size bytes from the start of the image must be free for
use by the kernel.
+NOTE: versions prior to v4.6 cannot make use of memory below the
+physical offset of the Image so it is recommended that the Image be
+placed as close as possible to the start of system RAM.
Any memory described to the kernel (even that below the start of the
image) which is not marked as reserved from the kernel (e.g., with a
diff --git a/Documentation/arm64/silicon-errata.txt b/Documentation/arm64/silicon-errata.txt
index 58b71ddf9..ba4b6acfc 100644
--- a/Documentation/arm64/silicon-errata.txt
+++ b/Documentation/arm64/silicon-errata.txt
@@ -56,3 +56,4 @@ stable kernels.
| | | | |
| Cavium | ThunderX ITS | #22375, #24313 | CAVIUM_ERRATUM_22375 |
| Cavium | ThunderX GICv3 | #23154 | CAVIUM_ERRATUM_23154 |
+| Cavium | ThunderX Core | #27456 | CAVIUM_ERRATUM_27456 |