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- Support DDRMC0 region 0 up to 2G in size
- Support DDRMC0 region 1 with DDR memory greater than 2G
up to the DDRMC0 max amount
- Extend the heap with region 1's memory
Closes #4684
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There were two bugs with MMU page use that were partially hiding each
other. The linker script page table section was 4x the size it needed to
be and the page table allocation routine was allocating pages PTRSIZE
times larger than it needed to. On ILP32, this resulted in incorrect but
functional allocation. On LP64, this resulted in allocation failures
earlier than expected.
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Currently, the AArch64 BSPs have a hard time running on real hardware
without building the toolchain and the bsps with -mstrict-align in
multiple places. Configuring the MMU on these chips allows for unaligned
memory accesses for non-device memory which avoids requiring strict
alignment in the toolchain and in the BSPs themselves.
In writing this driver, it was found that the synchronous exception
handling code needed to be rewritten since it relied on clearing SCTLR_EL1 to
avoid thread stack misalignments in RTEMS_DEBUG mode. This is now
avoided by exactly preserving thread mode stack and flags and the new
implementation is compatible with the draft information provided on the
mailing list covering the Exception Management API.
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This adds a BSP family that runs on the Xilinx Ultrascale+ MPSOC
(ZynqMP) family of chips. It is configured to be usable on the Qemu
ZCU102 machine definition and should be almost trivially portable to
ZynqMP development boards and custom hardware. It is also configured to
be usable with libbsd.
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This adds an AArch64 basic BSP based on Qemu's Cortex-A53 emulation with
interrupt support using GICv3 and clock support using the ARM GPT.
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Update #3818.
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