X-Git-Url: https://review.openocd.org/gitweb?p=openocd.git;a=blobdiff_plain;f=src%2Ftarget%2Fcortex_m.c;h=a6a9309e2c8aac0b0898ff2f561d8b544cf8c03d;hp=831d01a79f35df9949e207ba2c21bed3635cb513;hb=cd9b9a636411671808e8669ad8d6ee8f8815ad1b;hpb=88258042730260a763115d0718bd027a7708200d

diff --git a/src/target/cortex_m.c b/src/target/cortex_m.c
index 831d01a79f..a6a9309e2c 100644
--- a/src/target/cortex_m.c
+++ b/src/target/cortex_m.c
@@ -19,9 +19,7 @@
  *   GNU General Public License for more details.                          *
  *                                                                         *
  *   You should have received a copy of the GNU General Public License     *
- *   along with this program; if not, write to the                         *
- *   Free Software Foundation, Inc.,                                       *
- *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.           *
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>. *
  *                                                                         *
  *                                                                         *
  *   Cortex-M3(tm) TRM, ARM DDI 0337E (r1p1) and 0337G (r2p0)              *
@@ -1877,6 +1875,11 @@ static void cortex_m_dwt_free(struct target *target)
 #define MVFR0_DEFAULT_M4 0x10110021
 #define MVFR1_DEFAULT_M4 0x11000011
 
+#define MVFR0_DEFAULT_M7_SP 0x10110021
+#define MVFR0_DEFAULT_M7_DP 0x10110221
+#define MVFR1_DEFAULT_M7_SP 0x11000011
+#define MVFR1_DEFAULT_M7_DP 0x12000011
+
 int cortex_m_examine(struct target *target)
 {
 	int retval;
@@ -1923,23 +1926,42 @@ int cortex_m_examine(struct target *target)
 
 		LOG_DEBUG("Cortex-M%d r%" PRId8 "p%" PRId8 " processor detected",
 				i, (uint8_t)((cpuid >> 20) & 0xf), (uint8_t)((cpuid >> 0) & 0xf));
+		if (i == 7) {
+			uint8_t rev, patch;
+			rev = (cpuid >> 20) & 0xf;
+			patch = (cpuid >> 0) & 0xf;
+			if ((rev == 0) && (patch < 2))
+				LOG_WARNING("Silicon bug: single stepping will enter pending exception handler!");
+		}
 		LOG_DEBUG("cpuid: 0x%8.8" PRIx32 "", cpuid);
 
-		/* test for floating point feature on cortex-m4 */
 		if (i == 4) {
 			target_read_u32(target, MVFR0, &mvfr0);
 			target_read_u32(target, MVFR1, &mvfr1);
 
+			/* test for floating point feature on Cortex-M4 */
 			if ((mvfr0 == MVFR0_DEFAULT_M4) && (mvfr1 == MVFR1_DEFAULT_M4)) {
 				LOG_DEBUG("Cortex-M%d floating point feature FPv4_SP found", i);
 				armv7m->fp_feature = FPv4_SP;
 			}
+		} else if (i == 7) {
+			target_read_u32(target, MVFR0, &mvfr0);
+			target_read_u32(target, MVFR1, &mvfr1);
+
+			/* test for floating point features on Cortex-M7 */
+			if ((mvfr0 == MVFR0_DEFAULT_M7_SP) && (mvfr1 == MVFR1_DEFAULT_M7_SP)) {
+				LOG_DEBUG("Cortex-M%d floating point feature FPv5_SP found", i);
+				armv7m->fp_feature = FPv5_SP;
+			} else if ((mvfr0 == MVFR0_DEFAULT_M7_DP) && (mvfr1 == MVFR1_DEFAULT_M7_DP)) {
+				LOG_DEBUG("Cortex-M%d floating point feature FPv5_DP found", i);
+				armv7m->fp_feature = FPv5_DP;
+			}
 		} else if (i == 0) {
 			/* Cortex-M0 does not support unaligned memory access */
 			armv7m->arm.is_armv6m = true;
 		}
 
-		if (armv7m->fp_feature != FPv4_SP &&
+		if (armv7m->fp_feature == FP_NONE &&
 		    armv7m->arm.core_cache->num_regs > ARMV7M_NUM_CORE_REGS_NOFP) {
 			/* free unavailable FPU registers */
 			size_t idx;
@@ -1954,8 +1976,9 @@ int cortex_m_examine(struct target *target)
 			armv7m->arm.core_cache->num_regs = ARMV7M_NUM_CORE_REGS_NOFP;
 		}
 
-		if ((i == 4 || i == 3) && !armv7m->stlink) {
-			/* Cortex-M3/M4 has 4096 bytes autoincrement range */
+		if ((i == 3 || i == 4 || i == 7) && !armv7m->stlink) {
+			/* Cortex-M3/M4/M7 have at least 4096 bytes autoincrement range,
+			 * s. ARM IHI 0031C: MEM-AP 7.2.2 */
 			armv7m->debug_ap->tar_autoincr_block = (1 << 12);
 		}