diff options
Diffstat (limited to 'cpu-supplement')
| -rw-r--r-- | cpu-supplement/aarch64.rst | 5 |
1 files changed, 4 insertions, 1 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 ============================== |