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Disable multiprocessor-id read on ARMv7-R cores 

ARMv7-R cores are largely uniprocessor-configured, and when they are
multiprocessor-configured the format of the MPIDR register isn't
compatible with ARMv7-A cores.

Change-Id: I024ec514496fbab5075c6fb34b6acd870e68e1fc
Signed-off-by: Alex Ray <a@machinaut.com>
Reviewed-on: http://openocd.zylin.com/2096
Tested-by: jenkins
Reviewed-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
This commit is contained in:
Alex Ray 2014-04-06 07:34:27 -07:00 committed by Andreas Fritiofson
parent 9744a2fa20
commit 248b85a6e7
1 changed files with 11 additions and 1 deletions
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12
src/target/armv7a.c
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@ -545,6 +545,16 @@ static int armv7a_read_mpidr(struct target *target)
&mpidr);
if (retval != ERROR_OK)
goto done;
/* ARMv7R uses a different format for MPIDR.
* When configured uniprocessor (most R cores) it reads as 0.
* This will need to be implemented for multiprocessor ARMv7R cores. */
if (armv7a->is_armv7r) {
if (mpidr)
LOG_ERROR("MPIDR nonzero in ARMv7-R target");
goto done;
}
if (mpidr & 1<<31) {
armv7a->multi_processor_system = (mpidr >> 30) & 1;
armv7a->cluster_id = (mpidr >> 8) & 0xf;
@ -555,7 +565,7 @@ static int armv7a_read_mpidr(struct target *target)
armv7a->multi_processor_system == 0 ? "multi core" : "mono core");
} else
LOG_ERROR("mpdir not in multiprocessor format");
LOG_ERROR("MPIDR not in multiprocessor format");
done:
dpm->finish(dpm);