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Move arch/cpu/context files
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This commit is contained in:
Zhang Junyang
committed by
Tate, Hongliang Tian
Tate, Hongliang Tian
parent
298a205da2
commit
fc67adb1f0
@ -1,230 +0,0 @@
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// SPDX-License-Identifier: MPL-2.0
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//! CPU
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pub mod local;
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use core::fmt::Debug;
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use riscv::register::scause::{Exception, Trap};
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pub use super::trap::GeneralRegs as RawGeneralRegs;
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use super::trap::{TrapFrame, UserContext as RawUserContext};
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use crate::user::{ReturnReason, UserContextApi, UserContextApiInternal};
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/// Cpu context, including both general-purpose registers and FPU state.
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#[derive(Clone, Copy, Debug)]
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#[repr(C)]
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pub struct UserContext {
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user_context: RawUserContext,
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trap: Trap,
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fpu_state: (), // TODO
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cpu_exception_info: CpuExceptionInfo,
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}
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/// CPU exception information.
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#[derive(Clone, Copy, Debug)]
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#[repr(C)]
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pub struct CpuExceptionInfo {
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/// The type of the exception.
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pub code: Exception,
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/// The error code associated with the exception.
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pub page_fault_addr: usize,
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pub error_code: usize, // TODO
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}
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impl Default for UserContext {
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fn default() -> Self {
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UserContext {
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user_context: RawUserContext::default(),
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trap: Trap::Exception(Exception::Unknown),
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fpu_state: (),
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cpu_exception_info: CpuExceptionInfo::default(),
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}
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}
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}
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impl Default for CpuExceptionInfo {
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fn default() -> Self {
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CpuExceptionInfo {
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code: Exception::Unknown,
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page_fault_addr: 0,
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error_code: 0,
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}
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}
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}
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impl CpuExceptionInfo {
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/// Get corresponding CPU exception
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pub fn cpu_exception(&self) -> CpuException {
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self.code
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}
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}
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impl UserContext {
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/// Returns a reference to the general registers.
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pub fn general_regs(&self) -> &RawGeneralRegs {
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&self.user_context.general
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}
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/// Returns a mutable reference to the general registers
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pub fn general_regs_mut(&mut self) -> &mut RawGeneralRegs {
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&mut self.user_context.general
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}
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/// Returns the trap information.
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pub fn trap_information(&self) -> &CpuExceptionInfo {
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&self.cpu_exception_info
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}
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/// Returns a reference to the FPU state.
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pub fn fpu_state(&self) -> &() {
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&self.fpu_state
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}
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/// Returns a mutable reference to the FPU state.
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pub fn fpu_state_mut(&mut self) -> &mut () {
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&mut self.fpu_state
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}
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/// Sets thread-local storage pointer.
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pub fn set_tls_pointer(&mut self, tls: usize) {
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self.set_tp(tls)
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}
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/// Gets thread-local storage pointer.
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pub fn tls_pointer(&self) -> usize {
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self.tp()
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}
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/// Activates thread-local storage pointer on the current CPU.
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pub fn activate_tls_pointer(&self) {
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// No-op
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}
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}
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impl UserContextApiInternal for UserContext {
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fn execute<F>(&mut self, mut has_kernel_event: F) -> ReturnReason
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where
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F: FnMut() -> bool,
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{
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let ret = loop {
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self.user_context.run();
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match riscv::register::scause::read().cause() {
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Trap::Interrupt(_) => todo!(),
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Trap::Exception(Exception::UserEnvCall) => {
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self.user_context.sepc += 4;
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break ReturnReason::UserSyscall;
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}
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Trap::Exception(e) => {
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let stval = riscv::register::stval::read();
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log::trace!("Exception, scause: {e:?}, stval: {stval:#x?}");
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self.cpu_exception_info = CpuExceptionInfo {
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code: e,
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page_fault_addr: stval,
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error_code: 0,
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};
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break ReturnReason::UserException;
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}
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}
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if has_kernel_event() {
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break ReturnReason::KernelEvent;
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}
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};
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crate::arch::irq::enable_local();
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ret
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}
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fn as_trap_frame(&self) -> TrapFrame {
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TrapFrame {
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general: self.user_context.general,
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sstatus: self.user_context.sstatus,
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sepc: self.user_context.sepc,
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}
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}
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}
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impl UserContextApi for UserContext {
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fn trap_number(&self) -> usize {
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todo!()
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}
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fn trap_error_code(&self) -> usize {
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todo!()
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}
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fn instruction_pointer(&self) -> usize {
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self.user_context.sepc
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}
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fn set_instruction_pointer(&mut self, ip: usize) {
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self.user_context.set_ip(ip);
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}
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fn stack_pointer(&self) -> usize {
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self.user_context.get_sp()
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}
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fn set_stack_pointer(&mut self, sp: usize) {
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self.user_context.set_sp(sp);
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}
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}
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macro_rules! cpu_context_impl_getter_setter {
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( $( [ $field: ident, $setter_name: ident] ),*) => {
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impl UserContext {
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$(
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#[doc = concat!("Gets the value of ", stringify!($field))]
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#[inline(always)]
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pub fn $field(&self) -> usize {
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self.user_context.general.$field
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}
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#[doc = concat!("Sets the value of ", stringify!($field))]
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#[inline(always)]
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pub fn $setter_name(&mut self, $field: usize) {
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self.user_context.general.$field = $field;
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}
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)*
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}
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};
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}
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cpu_context_impl_getter_setter!(
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[ra, set_ra],
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[sp, set_sp],
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[gp, set_gp],
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[tp, set_tp],
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[t0, set_t0],
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[t1, set_t1],
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[t2, set_t2],
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[s0, set_s0],
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[s1, set_s1],
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[a0, set_a0],
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[a1, set_a1],
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[a2, set_a2],
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[a3, set_a3],
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[a4, set_a4],
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[a5, set_a5],
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[a6, set_a6],
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[a7, set_a7],
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[s2, set_s2],
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[s3, set_s3],
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[s4, set_s4],
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[s5, set_s5],
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[s6, set_s6],
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[s7, set_s7],
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[s8, set_s8],
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[s9, set_s9],
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[s10, set_s10],
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[s11, set_s11],
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[t3, set_t3],
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[t4, set_t4],
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[t5, set_t5],
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[t6, set_t6]
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);
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/// CPU exception.
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pub type CpuException = Exception;
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