mirror of
https://github.com/RGBCube/serenity
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7c0540a229
This has KString, KBuffer, DoubleBuffer, KBufferBuilder, IOWindow, UserOrKernelBuffer and ScopedCritical classes being moved to the Kernel/Library subdirectory. Also, move the panic and assertions handling code to that directory.
64 lines
1.8 KiB
C++
64 lines
1.8 KiB
C++
/*
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* Copyright (c) 2022, Timon Kruiper <timonkruiper@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Types.h>
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#include <Kernel/Library/StdLib.h>
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#include <Kernel/Memory/AddressSpace.h>
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namespace Kernel {
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struct ThreadRegisters {
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u64 x[31];
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u64 spsr_el1;
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u64 elr_el1;
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u64 sp_el0;
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u64 ttbr0_el1;
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FlatPtr ip() const { return elr_el1; }
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void set_ip(FlatPtr value) { elr_el1 = value; }
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FlatPtr sp() const { return sp_el0; }
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void set_sp(FlatPtr value) { sp_el0 = value; }
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void set_initial_state(bool is_kernel_process, Memory::AddressSpace& space, FlatPtr kernel_stack_top)
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{
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set_sp(kernel_stack_top);
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ttbr0_el1 = space.page_directory().ttbr0();
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set_spsr_el1(is_kernel_process);
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}
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void set_entry_function(FlatPtr entry_ip, FlatPtr entry_data)
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{
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set_ip(entry_ip);
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x[0] = entry_data;
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}
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void set_exec_state(FlatPtr entry_ip, FlatPtr userspace_sp, Memory::AddressSpace& space)
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{
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set_ip(entry_ip);
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set_sp(userspace_sp);
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ttbr0_el1 = space.page_directory().ttbr0();
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set_spsr_el1(false);
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}
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void set_spsr_el1(bool is_kernel_process)
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{
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Aarch64::SPSR_EL1 saved_program_status_register_el1 = {};
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// Don't mask any interrupts, so all interrupts are enabled when transfering into the new context
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saved_program_status_register_el1.D = 0;
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saved_program_status_register_el1.A = 0;
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saved_program_status_register_el1.I = 0;
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saved_program_status_register_el1.F = 0;
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saved_program_status_register_el1.M = is_kernel_process ? Aarch64::SPSR_EL1::Mode::EL1h : Aarch64::SPSR_EL1::Mode::EL0t;
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memcpy(&spsr_el1, &saved_program_status_register_el1, sizeof(u64));
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}
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};
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}
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