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arm11: add etmr/etmw registers to access ETM via DBGTAP scan chain

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First cut of these commands. Øyvind tinkered a bit with
the number parsing to bring it up to speed + rebased it.
Ready for testing.

Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
This commit is contained in:
Michael Bruck
2009-10-27 22:41:00 +01:00
committed by Øyvind Harboe
parent c202ba7d34
commit 627bd19768
3 changed files with 142 additions and 0 deletions
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76
src/target/arm11_dbgtap.c
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@@ -940,3 +940,79 @@ int arm11_read_memory_word(arm11_common_t * arm11, uint32_t address, uint32_t *
}
/** Write Embedded Trace Macrocell (ETM) via Scan chain 6
*
* http://infocenter.arm.com/help/topic/com.arm.doc.ddi0318e/Bcfddjeh.html#Bcfggcbe
*
* \param arm11 Target state variable.
* \param address 7 bit ETM register address
* \param value Value to be written
*
* \return Error status
*
* \remarks This is a stand-alone function that executes the JTAG command queue.
*/
int arm11_write_etm(arm11_common_t * arm11, uint8_t address, uint32_t value)
{
CHECK_RETVAL(arm11_add_debug_SCAN_N(arm11, 0x06, ARM11_TAP_DEFAULT));
/* Uses INTEST for read and write */
arm11_add_IR(arm11, ARM11_INTEST, ARM11_TAP_DEFAULT);
scan_field_t chain6_fields[3];
uint8_t nRW = 1;
arm11_setup_field(arm11, 32, &value, NULL, chain6_fields + 0);
arm11_setup_field(arm11, 7, &address, NULL, chain6_fields + 1);
arm11_setup_field(arm11, 1, &nRW, NULL, chain6_fields + 2);
arm11_add_dr_scan_vc(asizeof(chain6_fields), chain6_fields, TAP_IDLE);
CHECK_RETVAL(jtag_execute_queue());
return ERROR_OK;
}
/** Read Embedded Trace Macrocell (ETM) via Scan chain 6
*
* http://infocenter.arm.com/help/topic/com.arm.doc.ddi0318e/Bcfddjeh.html#Bcfggcbe
*
* \param arm11 Target state variable.
* \param address 7 bit ETM register address
* \param value Pointer that receives value that was read
*
* \return Error status
*
* \remarks This is a stand-alone function that executes the JTAG command queue.
*/
int arm11_read_etm(arm11_common_t * arm11, uint8_t address, uint32_t * value)
{
CHECK_RETVAL(arm11_add_debug_SCAN_N(arm11, 0x06, ARM11_TAP_DEFAULT));
/* Uses INTEST for read and write */
arm11_add_IR(arm11, ARM11_INTEST, ARM11_TAP_DEFAULT);
scan_field_t chain6_fields[3];
uint8_t nRW = 0;
arm11_setup_field(arm11, 32, NULL, NULL, chain6_fields + 0);
arm11_setup_field(arm11, 7, &address, NULL, chain6_fields + 1);
arm11_setup_field(arm11, 1, &nRW, NULL, chain6_fields + 2);
arm11_add_dr_scan_vc(asizeof(chain6_fields), chain6_fields, TAP_IDLE);
/* Data is made available in Capture-DR and shifted out on the next access */
arm11_setup_field(arm11, 32, NULL, value, chain6_fields + 0);
arm11_setup_field(arm11, 7, &address, NULL, chain6_fields + 1);
arm11_setup_field(arm11, 1, &nRW, NULL, chain6_fields + 2);
arm11_add_dr_scan_vc(asizeof(chain6_fields), chain6_fields, TAP_IDLE);
CHECK_RETVAL(jtag_execute_queue());
return ERROR_OK;
}