defines crx registers detailed More...

#include <types.h>

Macros
#define	___CPU_CRX_H 0

#define	CPU_MSR_EFER 0xC0000080
	extended feature register

#define	CPU_MSR_STAR 0xC0000081
	system call target address register

#define	CPU_MSR_LSTAR 0xC0000082
	system call target address register

#define	CPU_MSR_FMASK 0xC0000084
	system call rflags mask register

#define	CPU_MSR_IA32_FS_BASE 0xC0000100
	fs base address

#define	CPU_MSR_IA32_GS_BASE 0xC0000101
	gs base address

#define	CPU_MSR_IA32_KERNEL_GS_BASE 0xC0000102
	kernel gs base address

Typedefs
typedef union cpu_reg_cr0_t	cpu_reg_cr0_t
	shard hand for struct cpu_reg_cr0_s

typedef union cpu_reg_cr4_u	cpu_reg_cr4_t
	short hand for union cpu_reg_cr4_u

Functions
cpu_reg_cr4_t	cpu_read_cr4 (void)
	reads cr4 register

void	cpu_write_cr4 (cpu_reg_cr4_t cr4)
	writes cr4 register

cpu_reg_cr0_t	cpu_read_cr0 (void)
	reads cr0 register

void	cpu_write_cr0 (cpu_reg_cr0_t cr0)
	writes cr0 register

void	cpu_toggle_cr0_wp (void)
	toggles write protect bit cr0, when setted kernel can not modify readonly pages

void	cpu_cr0_disable_wp (void)
	disables write protect bit cr0, when setted kernel can not modify readonly pages

void	cpu_cr0_enable_wp (void)
	enables write protect bit cr0, when setted kernel can not modify readonly pages

void	cpu_enable_sse (void)
	enables sse support, modifies cr4 register

Detailed Description

defines crx registers detailed

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

Macro Definition Documentation

#define ___CPU_CRX_H 0

prevent duplicate header error macro

cpu_reg_cr0_t cpu_read_cr0 ( void )

reads cr0 register

cpu_reg_cr4_t cpu_read_cr4 ( void )

reads cr4 register

void cpu_write_cr0 ( cpu_reg_cr0_t cr0 )

writes cr0 register

Parameters

[in] cr0 cr0 value

void cpu_write_cr4 ( cpu_reg_cr4_t cr4 )

writes cr4 register

Parameters

[in] cr4 cr4 value