Struct CpuState 

#[repr(align(64))]
pub struct CpuState {
    tss: Tss,
    gdt: UncheckedCell<GlobalDescriptorTable>,
    gs_info: GsInfo,
}

Per-CPU state such as TSS and GDT

Fields

tss: Tss

gdt: UncheckedCell<GlobalDescriptorTable>

gs_info: GsInfo

Implementations

impl CpuState

pub const fn new() -> Self

Constructor; returns a CpuState with an uninitialized TSS and GDT

pub unsafe fn init_tss(&'static self)

Initialize the TSS

Safety

The caller must guarantee that this method is called exactly once before any calls to CpuState::tss are made

pub unsafe fn init_gdt(&'static self) -> GdtSetupInfo

Initialize the GDT

Safety

The caller must guarantee the following:

• That this method has never been called before and will never be called again
• That at the time of calling this method, no references or pointers to this data exist
• While this method is being called, no other CPU is working with the given data

pub unsafe fn init_gs_info(&'static self)

Initialize the GS Info Struct

Safety

The caller must guarantee the following:

• This method is called exactly once on the CPU which owns the given CpuState
• This method is called before the first jump to userspace on the CPU which owns the given CpuState

pub unsafe fn set_kernel_stack_top(&self, kernel_stack_top: VirtAddr)

Set the kernel stack top of the CPU which owns this CpuState

Safety

The caller must guarantee the following:

• That CpuState::init_tss has already been called
• This method is only called on the CPU which owns this TSS
• That no refs/ptrs from CpuState::tss are held when this is called
• kernel_stack_top is a valid pointer to a valid, mapped kernel stack

pub fn tss(&self) -> &Tss

Getter for CpuState::tss

pub unsafe fn gdt(&self) -> &GlobalDescriptorTable

Getter for CpuState::gdt

Safety

The caller must guarantee the following:

• That this value’s init method has already been called before
• That at this method’s entire execution time, no mutable references or pointers to this data exist or will exist

pub fn gs_info(&self) -> &GsInfo

Getter for CpuState::gs_info