CPU. More...

Modules
	GDT
	Global Descriptor Table.

	IDT
	Interrupt Descriptor Table.

	Interrupts
	Interrupt Handling.

	IRQ
	Interrupt Request handling.

	Port I/O
	Port I/O operations.

	SIMD
	SIMD context management.

	SMP
	Symmetric multi processing.

	Stack Pointer
	Helpers for managing stacks.

	Syscalls
	System Calls.

	Trampoline
	Trampoline for CPU initialization.

	TSS
	Task State Segment.

Data Structures
struct	cpu_t
	CPU structure. More...

Macros
#define	CPU_STACK_CANARY 0x1234567890ABCDEFULL
	CPU stack canary value.

#define	CPU_MAX UINT8_MAX
	Maximum number of CPUs supported.

#define	CPU_ID_BOOTSTRAP 0
	ID of the bootstrap CPU.

#define	CPU_ID_INVALID UINT16_MAX
	Invalid CPU ID.

Typedefs
typedef uint16_t	cpuid_t
	Type used to identify a CPU.

Functions
uint64_t	cpu_init (cpu_t *cpu, cpuid_t id)
	Initializes a CPU structure as part of the boot process.

void	cpu_stacks_overflow_check (cpu_t *cpu)
	Checks for CPU stack overflows.

Detailed Description

CPU.

Macro Definition Documentation

◆ CPU_ID_BOOTSTRAP

#define CPU_ID_BOOTSTRAP 0

ID of the bootstrap CPU.

Definition at line 19 of file cpu_id.h.

◆ CPU_ID_INVALID

#define CPU_ID_INVALID UINT16_MAX

Invalid CPU ID.

Definition at line 24 of file cpu_id.h.

◆ CPU_MAX

#define CPU_MAX UINT8_MAX

Maximum number of CPUs supported.

Definition at line 14 of file cpu_id.h.

◆ CPU_STACK_CANARY

#define CPU_STACK_CANARY 0x1234567890ABCDEFULL

CPU stack canary value.

Placed at the bottom of CPU stacks, we then check in the interrupt handler if any of the stacks have overflowed by checking if its canary has been modified.

Definition at line 31 of file cpu.h.

Typedef Documentation

◆ cpuid_t

typedef uint16_t cpuid_t

Type used to identify a CPU.

Definition at line 29 of file cpu_id.h.

Function Documentation

◆ cpu_init()

uint64_t cpu_init	(	cpu_t *	cpu,
		cpuid_t	id
	)

Initializes a CPU structure as part of the boot process.

Must be called on the CPU that will be represented by the cpu structure.

Parameters

cpu	The CPU structure to initialize.
id	The ID of the CPU.

Returns: On success, 0. On failure, ERR and errno is set.

Definition at line 16 of file cpu.c.

References stack_pointer_t::bottom, CONFIG_INTERRUPT_STACK_PAGES, CPU_STACK_CANARY, cpu_t::doubleFaultStack, ERR, cpu_t::exceptionStack, gdt_cpu_load(), gdt_cpu_tss_load(), cpu_t::id, id, idt_cpu_load(), cpu_t::interrupt, interrupt_ctx_init(), cpu_t::interruptStack, lapic_cpu_init(), lapic_self_id(), cpu_t::lapicId, LOG_ERR, MSR_CPU_ID, msr_write(), cpu_t::sched, sched_cpu_ctx_init(), simd_cpu_init(), stack_pointer_deinit_buffer(), stack_pointer_init_buffer(), cpu_t::stat, statistics_cpu_ctx_init(), syscalls_cpu_init(), cpu_t::timer, timer_ctx_init(), cpu_t::tss, tss_init(), TSS_IST_DOUBLE_FAULT, TSS_IST_EXCEPTION, TSS_IST_INTERRUPT, tss_ist_load(), cpu_t::vmm, vmm_cpu_ctx_init(), cpu_t::wait, and wait_cpu_ctx_init().

Referenced by smp_bootstrap_init(), and trampoline_c_entry().

◆ cpu_stacks_overflow_check()

void cpu_stacks_overflow_check ( cpu_t * cpu )

Checks for CPU stack overflows.

Checks the canary values at the bottom of each CPU stack and if its been modified panics.

Parameters

cpu	The CPU to check.

Definition at line 69 of file cpu.c.

References stack_pointer_t::bottom, CPU_STACK_CANARY, cpu_t::doubleFaultStack, cpu_t::exceptionStack, cpu_t::id, cpu_t::interruptStack, NULL, and panic().

Referenced by interrupt_handler().

Modules

Data Structures

Macros

Typedefs

Functions