RGBCube/serenity
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10 commits

Author SHA1 Message Date
Nico Weber
fdc86ddae5 Kernel: Add a GPIO class for aarch64 
This allows configuring the alternate pin functions and pin
pull up/down states, which is needed for using the UART.
 2021-09-26 11:55:51 +02:00
Nico Weber
697e6ccb89 Kernel: Add a Mailbox class for aarch64 
As a demo, query the firmware version. `Meta/serenity.sh gdb aarch64`
can be used to observe that qemu puts 0x548E1 in x0 in response
to this mailbox message.
 2021-09-19 17:45:59 +02:00
Nico Weber
d0b9c7a20b Kernel: Add a MMIO class for aarch64 
It doesn't do anything yet except figure out the peripheral base
address.

Very likely belongs in Kernel, not Prekernel, eventually.
 2021-09-19 17:45:59 +02:00
Nico Weber
3a24eb323f Kernel: Use new halt() for all our halting needs in aarch64 Prekernel 2021-09-19 17:45:59 +02:00
Nico Weber
0319aa315a Kernel: Add __stack_chk_fail to aarch64 Prekernel init 
This is needed for some functions with local variables. We'll grow
such a function soon.
 2021-09-19 17:45:59 +02:00
Nico Weber
3c6ad4c7db Kernel: Add a class to wrap aarch64 MIDR_EL1 
We'll need part_num() to determine the MMIO address base. It's
0x3F000000 on rpi3 but 0xFE000000 on rpi4.
 2021-09-12 17:26:41 +00:00
Nico Weber
18dcd7b9c9 Kernel: Define __stack_chk_guard for aarch64 Prekernel 
Needed for functions that have local variables.

In time we need to share this between aarch64 and intel, but while
we figure out what exactly the aarch64 Prekernel should do, let's
duplicate this.
 2021-09-12 17:26:41 +00:00
Nico Weber
62bc238ac3 Kernel: Let aarch64 port call into C++ 
Put all but the first core into a loop, make room for some stack,
and call init().
 2021-09-06 21:57:59 +01:00
Nico Weber
9c5e947e0e Prekernel: Make build on aarch64 
Add a dummy Arch/aarch64/boot.S that for now does nothing but
let all processor cores sleep.

For now, none of the actual Prekernel code is built for aarch64.
 2021-08-28 21:51:30 +01:00
Nico Weber
da785bd4bd Prekernel: Move boot.S and multiboot.S into an Arch/x86 subfolder 2021-08-28 21:51:30 +01:00