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arm_adi_v5: reduce some CSW writes 

MEM-AP access through banked data registers MEM_AP_REG_BD0..3
does not increment TAR regardless of the current autoincrement mode.
mem_ap_read_u32() and mem_ap_write_u32() can keep the current
autoincrement mode instead of switching autoincrement off.

Change-Id: Ib7ec688d3e04f1da678363cd2819ce90e8910e58
Signed-off-by: Tomas Vanek <vanekt@fbl.cz>
Reviewed-on: http://openocd.zylin.com/4163
Tested-by: jenkins
Reviewed-by: Andreas Bolsch <hyphen0break@gmail.com>
Reviewed-by: Christopher Head <chead@zaber.com>
Reviewed-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
This commit is contained in:
Tomas Vanek 2017-06-15 11:03:32 +02:00 committed by Andreas Fritiofson
parent 4553abf906
commit 81a33244df
1 changed files with 4 additions and 2 deletions
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6
src/target/arm_adi_v5.c
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@ -221,7 +221,8 @@ int mem_ap_read_u32(struct adiv5_ap *ap, uint32_t address,
/* Use banked addressing (REG_BDx) to avoid some link traffic /* Use banked addressing (REG_BDx) to avoid some link traffic
* (updating TAR) when reading several consecutive addresses. * (updating TAR) when reading several consecutive addresses.
*/ */
retval = mem_ap_setup_transfer(ap, CSW_32BIT | CSW_ADDRINC_OFF, retval = mem_ap_setup_transfer(ap,
CSW_32BIT | (ap->csw_value & CSW_ADDRINC_MASK),
address & 0xFFFFFFF0); address & 0xFFFFFFF0);
if (retval != ERROR_OK) if (retval != ERROR_OK)
return retval; return retval;
@ -272,7 +273,8 @@ int mem_ap_write_u32(struct adiv5_ap *ap, uint32_t address,
/* Use banked addressing (REG_BDx) to avoid some link traffic /* Use banked addressing (REG_BDx) to avoid some link traffic
* (updating TAR) when writing several consecutive addresses. * (updating TAR) when writing several consecutive addresses.
*/ */
retval = mem_ap_setup_transfer(ap, CSW_32BIT | CSW_ADDRINC_OFF, retval = mem_ap_setup_transfer(ap,
CSW_32BIT | (ap->csw_value & CSW_ADDRINC_MASK),
address & 0xFFFFFFF0); address & 0xFFFFFFF0);
if (retval != ERROR_OK) if (retval != ERROR_OK)
return retval; return retval;