diff options
| author | Peter Hoyes <[email protected]> | 2022-03-04 16:30:18 +0000 |
|---|---|---|
| committer | Tom Rini <[email protected]> | 2022-04-01 15:03:03 -0400 |
| commit | 8d78a6b67467145f7e02295ca5d4944251dbc645 (patch) | |
| tree | d7740ca3f69063f5ed0e37eed78dc222c529a381 /doc | |
| parent | 1a1143a45457161e90ea4cd5f3b0561d924ed8fe (diff) | |
vexpress64: Add ARMv8R-64 board variant
The ARMv8-R64 architecture introduces optional VMSA (paging based MMU)
support in the EL1/0 translation regime, which makes that part mostly
compatible to ARMv8-A.
Add a new board variant to describe the "BASE-R64" FVP model, which
inherits a lot from the existing v8-A FVP support. One major difference
is that the memory map in "inverted": DRAM starts at 0x0, MMIO is at
2GB [1].
* Create new TARGET_VEXPRESS64_BASER_FVP target, sharing most of the
exising configuration.
* Implement inverted memory map in vexpress_aemv8.h
* Create vexpress_aemv8r defconfig
* Provide an MMU memory map for the BASER_FVP
* Update vexpress64 documentation
At the moment the boot-wrapper is the only supported secure firmware. As
there is no official DT for the board yet, we rely on it being supplied
by the boot-wrapper into U-Boot, so use OF_HAS_PRIOR_STAGE, and go with
a dummy DT for now.
[1] https://developer.arm.com/documentation/100964/1114/Base-Platform/Base---memory/BaseR-Platform-memory-map
Signed-off-by: Peter Hoyes <[email protected]>
[Andre: rebase and add Linux kernel header]
Signed-off-by: Andre Przywara <[email protected]>
[trini: Add MAINTAINERS entry for Peter]
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/arch/arm64.rst | 3 | ||||
| -rw-r--r-- | doc/board/armltd/vexpress64.rst | 1 |
2 files changed, 3 insertions, 1 deletions
diff --git a/doc/arch/arm64.rst b/doc/arch/arm64.rst index 80498f6f6b8..7c0713504c4 100644 --- a/doc/arch/arm64.rst +++ b/doc/arch/arm64.rst @@ -18,7 +18,8 @@ Notes classical firmware (like initial hardware setup, CPU errata workarounds or SMP bringup). U-Boot can be entered in EL2 when its main purpose is that of a boot loader. It can drop to lower exception levels before - entering the OS. + entering the OS. For ARMv8-R it is recommened to enter at S-EL1, as for this + architecture there is no S-EL3. 2. U-Boot for arm64 is compiled with AArch64-gcc. AArch64-gcc use rela relocation format, a tool(tools/relocate-rela) by Scott Wood diff --git a/doc/board/armltd/vexpress64.rst b/doc/board/armltd/vexpress64.rst index d87b1c38f5b..a7f771d2667 100644 --- a/doc/board/armltd/vexpress64.rst +++ b/doc/board/armltd/vexpress64.rst @@ -6,6 +6,7 @@ Arm Versatile Express The vexpress_* board configuration supports the following platforms: * FVP_Base_RevC-2xAEMvA + * FVP_BaseR_AEMv8R * Juno development board Fixed Virtual Platforms |