jt_cp15_920.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_cp15.h"
#include "jt_instr.h"

Functions

• unsigned int jtag_arm920_CP15PhysRegRead (int nreg)
• void jtag_arm920_CP15PhysRegWrite (int nreg, unsigned int regdata)
• void jtag_arm920_CP15Interpret (unsigned int cp15instr)
• unsigned int jtag_arm920_CP15_ReadITTB (void)
• unsigned int jtag_arm920_CP15_ReadDTTB (void)
• void jtag_arm920_CP15_CleanDcache (void)
• void jtag_arm920_CP15_DrainWriteBuffer (void)
• void jtag_arm920_CP15_InvalidateICache (void)
• void jtag_arm920_CP15_InvalidateTLB (void)

---

Detailed Description

ARM920 CP15-MMU Interface

---

Function Documentation

unsigned int jtag_arm920_CP15PhysRegRead

(

int

nreg

)

Read from "physical" CP15 Register.
Some of the CP15 Registers having an direct access like

• IDCODE
• CACHETYPE
• MMUCONTROL
• FCSE PID

   chain 15 the length is 40 bits
   Physical access mode to CP15

 bit [0] = 1;
 bit [1..32]: register value
 bit [33.38]: register address
 bit [39]:  read/write
 

Parameters:

nreg

register address number

Returns:

register value

References DBG_LEVEL_JTAG_ICERT_LOW, dbgPrintf(), instr_intest, INTEST, jtag_arm_set_chain(), jtag_exchange_data(), jtag_send_instr(), jtag_supp_bitstr2int_MSB_First(), jtag_supp_int2bitstr_MSB_First(), and scan_chain.

Referenced by jtag_arm920_CP15_CleanDcache(), jtag_arm920_CP15_DrainWriteBuffer(), jtag_arm920_CP15_InvalidateICache(), jtag_arm920_CP15_InvalidateTLB(), jtag_arm920_CP15_ReadDTTB(), jtag_arm920_CP15_ReadITTB(), jtag_arm9_ReadCP15Info(), and jtag_test().

void jtag_arm920_CP15PhysRegWrite	(	int	nreg,
		unsigned int	regdata
	)

Write data into "physical" CP15 Register.
Some of the CP15 Registers having an direct access like

• IDCODE
• CACHETYPE
• MMUCONTROL
• FCSE PID

   chain 15 the length is 40 bits
   Physical access mode to CP15

 bit [0] = 1;
 bit [1..32]: register value
 bit [33.38]: register address
 bit [39]:  read/write
 

Parameters:

	nreg	register address number
	regdata	register value

Returns:

-

References DBG_LEVEL_JTAG_ICERT_LOW, DBG_LEVEL_JTAG_INSTR, dbgPrintf(), IF_DBG, instr_intest, INTEST, jtag_arm_set_chain(), jtag_exchange_data(), jtag_send_instr(), jtag_supp_int2bitstr_MSB_First(), and scan_chain.

Referenced by jtag_arm920_CP15_CleanDcache(), jtag_arm920_CP15_DrainWriteBuffer(), jtag_arm920_CP15_InvalidateICache(), jtag_arm920_CP15_InvalidateTLB(), jtag_arm920_CP15_ReadDTTB(), and jtag_arm920_CP15_ReadITTB().

void jtag_arm920_CP15Interpret

(

unsigned int

cp15instr

)

Write CP15 ARM instruction into chain.
This instruction will be interpreted at next System speed run.

 chain 15 the length is 40 bits
 Interpreted access mode to CP15

 bit [0] = 0;
 bit [1..32]: MCR or MRC instr.
 bit [33.38]: 00000
 bit [39]: = 0 write ()
 

Parameters:

cp15instr

CP15 ARM instruction

Returns:

-

References DBG_LEVEL_JTAG_ICERT_LOW, DBG_LEVEL_JTAG_INSTR, dbgPrintf(), IF_DBG, instr_intest, INTEST, jtag_arm_set_chain(), jtag_exchange_data(), jtag_send_instr(), jtag_supp_int2bitstr_MSB_First(), and scan_chain.

Referenced by jtag_arm920_CP15_CleanDcache(), jtag_arm920_CP15_DrainWriteBuffer(), jtag_arm920_CP15_InvalidateICache(), jtag_arm920_CP15_InvalidateTLB(), jtag_arm920_CP15_ReadDTTB(), and jtag_arm920_CP15_ReadITTB().

unsigned int jtag_arm920_CP15_ReadITTB

(

void

)

Collect Translation Lookaside Buffer Table Base address for Instructions from CP15

Parameters:

-

Returns:

ITTB

References ARM_LDR, ARM_MRC_CP15_5_R0_C15_C1_2, ARM_NOP, ARM_STR, DBG_LEVEL_GDB_ARM_INFO, dbgPrintf(), DEBUG_REPEAT_SPEED, DEBUG_SPEED, instr_intest, INTEST, jtag_arm920_CP15Interpret(), jtag_arm920_CP15PhysRegRead(), jtag_arm920_CP15PhysRegWrite(), jtag_arm9_mov_chain1_data(), jtag_arm_chain1_sysspeed_restart(), jtag_arm_set_chain(), jtag_send_instr(), MMU920_PHYSACCESS_CP15_REGADDRESS_C15_STATE, READ_WRITE, SYSTEM_SPEED, and WRITE_ONLY.

Referenced by jtag_test().

unsigned int jtag_arm920_CP15_ReadDTTB

(

void

)

Collect Translation Lookaside Buffer Table Base address for Data from CP15

Parameters:

-

Returns:

DTTB

References ARM_LDR, ARM_MRC_CP15_0_R0_C2_C2_2, ARM_NOP, ARM_STR, DBG_LEVEL_GDB_ARM_INFO, dbgPrintf(), DEBUG_REPEAT_SPEED, DEBUG_SPEED, instr_intest, INTEST, jtag_arm920_CP15Interpret(), jtag_arm920_CP15PhysRegRead(), jtag_arm920_CP15PhysRegWrite(), jtag_arm9_mov_chain1_data(), jtag_arm_chain1_sysspeed_restart(), jtag_arm_set_chain(), jtag_send_instr(), MMU920_PHYSACCESS_CP15_REGADDRESS_C15_STATE, READ_WRITE, SYSTEM_SPEED, and WRITE_ONLY.

Referenced by jtag_test().

void jtag_arm920_CP15_CleanDcache

(

void

)

clean D Cache by running through all cache lines using index format:

  31  (32-A)     L  0
  |index|----|seg|--|

 Clean DCache single entry	MCR p15, 0, <Rd>, c7, c10, 2
 cn=7, cm=10, op1=0, op2=2
 

Parameters:

-

Returns:

-

References ARM_LDMIA, ARM_MCR_CP15_0_R0_C7_C10_2, ARM_NOP, ARM_STR, DBG_LEVEL_JTAG_ICERT_LOW, DBG_LEVEL_JTAG_INSTR, dbgPrintf(), DEBUG_REPEAT_SPEED, DEBUG_SPEED, IF_DBG, instr_intest, INTEST, jtag_arm920_CP15Interpret(), jtag_arm920_CP15PhysRegRead(), jtag_arm920_CP15PhysRegWrite(), jtag_arm9_mov_chain1_data(), jtag_arm_chain1_sysspeed_restart(), jtag_arm_set_chain(), jtag_send_instr(), MMU920_PHYSACCESS_CP15_REGADDRESS_C15_STATE, SYSTEM_SPEED, and WRITE_ONLY.

void jtag_arm920_CP15_DrainWriteBuffer

(

void

)

drain write buffer

 drain write buffer	MCR p15, 0, <Rd>, c7, c10, 4
 cn=7, cm=10, op1=0, op2=4
 

Parameters:

-

Returns:

-

References ARM_LDMIA, ARM_MCR_CP15_0_R0_C7_C10_4, ARM_NOP, ARM_STR, DBG_LEVEL_JTAG_ICERT_LOW, DBG_LEVEL_JTAG_INSTR, dbgPrintf(), DEBUG_REPEAT_SPEED, DEBUG_SPEED, IF_DBG, instr_intest, INTEST, jtag_arm920_CP15Interpret(), jtag_arm920_CP15PhysRegRead(), jtag_arm920_CP15PhysRegWrite(), jtag_arm9_mov_chain1_data(), jtag_arm_chain1_sysspeed_restart(), jtag_arm_set_chain(), jtag_send_instr(), MMU920_PHYSACCESS_CP15_REGADDRESS_C15_STATE, SYSTEM_SPEED, and WRITE_ONLY.

void jtag_arm920_CP15_InvalidateICache

(

void

)

invalidate ICache

 inval Instruction Cache	MCR p15, 0, <Rd>, c7, c5, 0
 cn=7, cm=5, op1=0, op2=0
 

Parameters:

-

Returns:

-

References ARM_LDMIA, ARM_MCR_CP15_0_R0_C7_C5_0, ARM_NOP, ARM_STR, DBG_LEVEL_JTAG_ICERT_LOW, DBG_LEVEL_JTAG_INSTR, dbgPrintf(), DEBUG_REPEAT_SPEED, DEBUG_SPEED, IF_DBG, instr_intest, INTEST, jtag_arm920_CP15Interpret(), jtag_arm920_CP15PhysRegRead(), jtag_arm920_CP15PhysRegWrite(), jtag_arm9_mov_chain1_data(), jtag_arm_chain1_sysspeed_restart(), jtag_arm_set_chain(), jtag_send_instr(), MMU920_PHYSACCESS_CP15_REGADDRESS_C15_STATE, SYSTEM_SPEED, and WRITE_ONLY.

void jtag_arm920_CP15_InvalidateTLB

(

void

)

invalidate TLB's

 inval TLB	MCR p15, 0, <Rd>, c8, c7, 0
 cn=8, cm=7, op1=0, op2=0
 

Parameters:

-

Returns:

-

References ARM_LDMIA, ARM_MCR_CP15_0_R0_C8_C7_0, ARM_NOP, ARM_STR, DBG_LEVEL_JTAG_ICERT_LOW, DBG_LEVEL_JTAG_INSTR, dbgPrintf(), DEBUG_REPEAT_SPEED, DEBUG_SPEED, IF_DBG, instr_intest, INTEST, jtag_arm920_CP15Interpret(), jtag_arm920_CP15PhysRegRead(), jtag_arm920_CP15PhysRegWrite(), jtag_arm9_mov_chain1_data(), jtag_arm_chain1_sysspeed_restart(), jtag_arm_set_chain(), jtag_send_instr(), MMU920_PHYSACCESS_CP15_REGADDRESS_C15_STATE, SYSTEM_SPEED, and WRITE_ONLY.