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10 commits

Author SHA1 Message Date
Idan Horowitz
0dc5c49938 Kernel: Call exit_trap in AArch64 restore_context_and_eret
This matches x86_64's behaviour in common_trap_exit. (called from
thread_context_first_enter)
Currently thread_context_first_enter is only called when creating new
processes from scratch, in which case this doesn't change the actual
behaviour. But once thread_context_first_enter is called as part of
execve support, this will ensure the Thread's m_current_trap is set
correctly to the new trap frame.
2023-04-03 02:59:37 -06:00
Timon Kruiper
7d0917f50b Kernel/aarch64: Remove tpidr_el0 from RegisterState
In the next commit, this register will be populated by directly writing
to it, instead of using the RegisterState mechanism.
2023-02-15 22:53:19 +01:00
Timon Kruiper
c7802cef25 Kernel/aarch64: Handle exceptions from lower exception level (EL)
When we execute in userspace, the exception level is EL0, so to handle
exceptions, such as interrupts, and syscalls, we need to add handlers to
vector_table.S. For now we only support running userspace applications
in AArch64 mode, so this commit only adds the handlers for that mode.
2023-02-08 18:19:48 +00:00
Timon Kruiper
247109cee6 Kernel/aarch64: Execute kernel with SP_EL1 instead of SP_EL0
Until now the kernel was always executing with SP_EL0, as this made the
initial dropping to EL1 a bit easier. This commit changes this behaviour
to use the corresponding SP_ELx for each exception level.

To make sure that the execution of the C++ code can continue, the
current stack pointer is copied into the corresponding SP_ELx just
before dropping an exception level.
2023-01-27 11:41:43 +01:00
Timon Kruiper
a5e98d3644 Kernel/aarch64: Add implementation of Processor::switch_context
This initial implementation makes it possible to actually context switch
between different kernel threads! :^)
2022-12-29 19:32:20 -07:00
Timon Kruiper
0b95d8cd24 Kernel/aarch64: Implement thread_context_first_enter
This requires two new functions, context_first_init and
restore_context_and_eret. With this code in place, we are now running
the first idle thread! :^)
2022-12-29 19:32:20 -07:00
Gunnar Beutner
056e406a12 Kernel: Add even more AARCH64 stubs 2022-10-18 13:08:25 +02:00
Timon Kruiper
3cf8d3361e Kernel: Add support for handling interrupts on aarch64
There is currently some code duplication between the aarch64
implementation and the x86 one, but this initial implementation works
for now. :^)
2022-06-02 13:14:12 +01:00
Timon Kruiper
e43fdcc77e Kernel: Add more exception handlers for aarch64 Kernel
The aarch64 Kernel runs with SP_EL0, thus exceptions that happen can now
be handled.
2022-05-21 20:23:32 +01:00
Jakub V. Flasar
6d2c298b66 Kernel: Move aarch64 Prekernel into Kernel
As there is no need for a Prekernel on aarch64, the Prekernel code was
moved into Kernel itself. The functionality remains the same.

SERENITY_KERNEL_AND_INITRD in run.sh specifies a kernel and an inital
ramdisk to be used by the emulator. This is needed because aarch64
does not need a Prekernel and the other ones do.
2022-03-12 14:54:12 -08:00
Renamed from Kernel/Prekernel/Arch/aarch64/vector_table.S (Browse further)