[rtems-docs commit] aarch64: Update interrupt details
Joel Sherrill
joel at rtems.org
Fri Dec 11 23:16:09 UTC 2020
Module: rtems-docs
Branch: master
Commit: 9c407619c72bd97b19d96092d20dc48ce9bb0256
Changeset: http://git.rtems.org/rtems-docs/commit/?id=9c407619c72bd97b19d96092d20dc48ce9bb0256
Author: Kinsey Moore <kinsey.moore at oarcorp.com>
Date: Mon Dec 7 12:10:26 2020 -0600
aarch64: Update interrupt details
---
cpu-supplement/aarch64.rst | 5 ++++-
user/bsps/aarch64/a53.rst | 5 +++--
2 files changed, 7 insertions(+), 3 deletions(-)
diff --git a/cpu-supplement/aarch64.rst b/cpu-supplement/aarch64.rst
index 9e74d6b..a102817 100644
--- a/cpu-supplement/aarch64.rst
+++ b/cpu-supplement/aarch64.rst
@@ -104,7 +104,10 @@ Interrupt Stack
---------------
The board support package must initialize the interrupt stack. The memory for
-the stacks is usually reserved in the linker script.
+the stacks is usually reserved in the linker script. The interrupt stack pointer
+is stored in the EL0 stack pointer and is accessed by switching to SP0 mode
+at the beginning of interrupt calls and back to SPx mode after completion of
+interrupt calls using the `spsel` instruction.
Default Fatal Error Processing
==============================
diff --git a/user/bsps/aarch64/a53.rst b/user/bsps/aarch64/a53.rst
index 9f085b8..73735b1 100644
--- a/user/bsps/aarch64/a53.rst
+++ b/user/bsps/aarch64/a53.rst
@@ -8,8 +8,9 @@
Qemu A53
========
-This BSP supports two variants, `qemu_a53_ilp32` and `qemu-a53_lp64`. The basic
-hardware initialization is performed by the BSP.
+This BSP supports two variants, `qemu_a53_ilp32` and `qemu_a53_lp64`. The basic
+hardware initialization is performed by the BSP. These BSPs support the GICv3
+interrupt controller.
Boot via ELF
------------
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