mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-09-30 08:41:15 +00:00
55 lines
969 B
C++
55 lines
969 B
C++
/*
|
|
* Copyright (c) 2021, James Mintram <me@jamesrm.com>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <Kernel/Arch/aarch64/Registers.h>
|
|
|
|
namespace Kernel::Aarch64::Asm {
|
|
|
|
inline void set_ttbr1_el1(FlatPtr ttbr1_el1)
|
|
{
|
|
asm("msr ttbr1_el1, %[value]" ::[value] "r"(ttbr1_el1));
|
|
}
|
|
|
|
inline void set_ttbr0_el1(FlatPtr ttbr0_el1)
|
|
{
|
|
asm("msr ttbr0_el1, %[value]" ::[value] "r"(ttbr0_el1));
|
|
}
|
|
|
|
inline void flush()
|
|
{
|
|
asm("dsb ish");
|
|
asm("isb");
|
|
}
|
|
|
|
[[noreturn]] inline void halt()
|
|
{
|
|
for (;;) {
|
|
asm volatile("wfi");
|
|
}
|
|
}
|
|
|
|
enum class ExceptionLevel : u8 {
|
|
EL0 = 0,
|
|
EL1 = 1,
|
|
EL2 = 2,
|
|
EL3 = 3,
|
|
};
|
|
|
|
inline ExceptionLevel get_current_exception_level()
|
|
{
|
|
u64 current_exception_level;
|
|
|
|
asm("mrs %[value], CurrentEL"
|
|
: [value] "=r"(current_exception_level));
|
|
|
|
current_exception_level = (current_exception_level >> 2) & 0x3;
|
|
return static_cast<ExceptionLevel>(current_exception_level);
|
|
}
|
|
|
|
}
|