cpu_simple.xx.c File Reference

cpu commands implementation that supports both real and long mode. More...

#include <cpu.h>
#include <logging.h>
#include <strings.h>

Functions
	MODULE ("turnstone.kernel.cpu")
void	cpu_hlt (void)
	stops cpu.
void	cpu_idle (void)
uint16_t	cpu_read_data_segment (void)
	reads data segment (ds) value from cpu.
int8_t	cpu_check_rdrand (void)
	checks rdrand supported
uint8_t	cpu_cpuid (cpu_cpuid_regs_t query, cpu_cpuid_regs_t *answer)
boolean_t	cpu_is_interrupt_enabled (void)
cpu_type_t	cpu_get_type (void)

Variables
static cpu_type_t	cpu_type = CPU_TYPE_UNKNOWN
static boolean_t	cpu_type_initialized = false

Detailed Description

cpu commands implementation that supports both real and long mode.

This work is licensed under TURNSTONE OS Public License. Please read and understand latest version of Licence.

Function Documentation

cpu_check_rdrand()

int8_t cpu_check_rdrand

(

void

)

checks rdrand supported

Returns

0 when supported else -1

cpu_hlt()

void cpu_hlt

(

void

)

stops cpu.

This command stops cpu using hlt assembly command inside for.

cpu_read_data_segment()

uint16_t cpu_read_data_segment

(

void

)

reads data segment (ds) value from cpu.

Returns

ds value

This function is meaningful at real mode. At long mode is does nothing