mirror of
https://github.com/fergalmoran/ladybird.git
synced 2026-01-06 00:25:12 +00:00
6d2c298b66
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.
49 lines
1000 B
ArmAsm
49 lines
1000 B
ArmAsm
/*
|
|
* Copyright (c) 2021, Nico Weber <thakis@chromium.org>
|
|
* Copyright (c) 2021, Marcin Undak <mcinek@gmail.com>
|
|
* Copyright (c) 2021, Jesse Buhagiar <jooster669@gmail.com>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
.global wait_cycles
|
|
.type wait_cycles, @function
|
|
wait_cycles:
|
|
Lstart:
|
|
// This is probably too fast when caching and branch prediction is turned on.
|
|
// FIXME: Make timer-based.
|
|
subs x0, x0, #1
|
|
bne Lstart
|
|
ret
|
|
|
|
.global enter_el2_from_el3
|
|
.type enter_el2_from_el3, @function
|
|
enter_el2_from_el3:
|
|
adr x0, entered_el2
|
|
msr elr_el3, x0
|
|
eret
|
|
entered_el2:
|
|
ret
|
|
|
|
.global enter_el1_from_el2
|
|
.type enter_el1_from_el2, @function
|
|
enter_el1_from_el2:
|
|
adr x0, entered_el1
|
|
msr elr_el2, x0
|
|
eret
|
|
entered_el1:
|
|
ret
|
|
|
|
//
|
|
// Installs the EL1 vector table
|
|
// Args:
|
|
// x0 - Address of vector table
|
|
//
|
|
// This function doesn't return a value
|
|
//
|
|
.global el1_vector_table_install
|
|
.type el1_vector_table_install, @function
|
|
el1_vector_table_install:
|
|
msr VBAR_EL1, x0
|
|
ret
|