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* bsps/aarch64: Add MMU driver to relax alignmentKinsey Moore2021-05-272-0/+433
| | | | | | | | | | | | | | | 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.
* bsps/aarch64: Add missing includeSebastian Huber2021-01-281-0/+1
| | | | | | | | | Fixes: bsps/shared/dev/irq/arm-gicv2.c:53:6: warning: no previous prototype for 'bsp_interrupt_dispatch' [-Wmissing-prototypes] Close #4227.
* bsps: Use header file for GIC architecture supportSebastian Huber2020-12-231-0/+72
| | | | | | This avoids a function call overhead in the interrupt dispatching. Update #4202.
* bsps: Add Cortex-A53 LP64 basic BSPKinsey Moore2020-10-052-0/+350
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.