jt_mmu.c File Reference

#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <stdio.h>
#include "dbg_msg.h"
#include "jt_arm.h"
#include "jt_mmu.h"
#include "jt_cp15.h"
#include "jt_instr.h"

Functions

• void jtag_arm_mmu_save_and_disable (void)
• void jtag_arm_mmu_disable (void)
• void jtag_arm_mmu_restore (void)
• void jtag_arm_mmu_disable_high_vectors (void)
• void jtag_arm_mmu_enable_high_vectors (void)
• int jtag_arm_mmu_check_high_vectors (void)
• int jtag_arm_mmu_virt2phys (uint32_t virtAddr, uint32_t *physAddrPtr)

---

Detailed Description

ARM MMU Interface

---

Function Documentation

void jtag_arm_mmu_save_and_disable

(

void

)

On Debug entry:
save the current MMU-state and disable MMU and its cache
Collect current state, Clean Cache and Write Buffer
disable MMU and its caches

Parameters:

-

Returns:

-

Referenced by gdb_main_loop(), and jtag_test().

void jtag_arm_mmu_disable

(

void

)

Disable MMU
(forget current state; and save as it has been Disabled before)

Parameters:

-

Returns:

-

Referenced by gdb_restart(), and jtag_test().

void jtag_arm_mmu_restore

(

void

)

On exit Debug:
Restore previous MMU State using global variable

• ice_state.mmu.inuse and
• ice_state.mmu.org_syscontr

Parameters:

-

Returns:

-

Referenced by gdb_action_continue(), and gdb_action_step().

void jtag_arm_mmu_disable_high_vectors

(

void

)

Disable mmu high vectors

Parameters:

-

Returns:

-

Referenced by gdb_monitor_Rcmd(), and jtag_test().

void jtag_arm_mmu_enable_high_vectors

(

void

)

Enable mmu high vectors

Parameters:

-

Returns:

-

Referenced by gdb_monitor_Rcmd().

int jtag_arm_mmu_check_high_vectors

(

void

)

Check if mmu high vectors enabled

Parameters:

-

Return values:

	0	disabled (or dosn't have this feature)
	1	high vectors enabled

Referenced by armOsabiMultiThreading(), gdb_main_loop(), gdb_monitor_Rcmd(), and jtag_arm_DumpCPUregs().

int jtag_arm_mmu_virt2phys	(	uint32_t	virtAddr,
		uint32_t *	physAddrPtr
	)

translate a virtual address into a physical address

Parameters:

	virtAddr	virtual address
	physAddrPtr	Pointer to store the calculated physical address

Return values:

	0	invalid virtual address
	1	valid virtual address

Referenced by gdb_action_step(), gdb_handle_exception(), gdb_main_loop(), gdb_vquery(), and InsertBreakpoint().