Enable HwbpManual

Signed-off-by: 梁镇 <[email protected]>
Change-Id: I2ee8718f03d6e381369b7d3bb0222563789ed525

Author: lz-bro

debug/gdbserver.py

@@ -613,11 +613,10 @@ def early_applicable(self):
         return self.hart.instruction_hardware_breakpoint_count > 0
 
     def test(self):
-        if not self.hart.honors_tdata1_hmode:
-            # Run to main before setting the breakpoint, because startup code
-            # will otherwise clear the trigger that we set.
-            self.gdb.b("main")
-            self.gdb.c()
+        # Run to main before setting the breakpoint, because startup code
+        # will otherwise clear the trigger that we set.
+        self.gdb.b("main")
+        self.gdb.c()
 
         self.gdb.command("delete")
         self.gdb.hbreak("rot13")
@@ -630,8 +629,10 @@ def test(self):
         self.gdb.b("_exit")
         self.exit()
 
-def MCONTROL_TYPE(xlen):
-    return 0xf<<((xlen)-4)
+def MCONTROL_TYPE(version, xlen):
+    if version == 0x3:
+        return 0x6<<((xlen)-4)
+    return 0x2<<((xlen)-4)
 def MCONTROL_DMODE(xlen):
     return 1<<((xlen)-5)
 def MCONTROL_MASKMAX(xlen):
@@ -677,15 +678,18 @@ def early_applicable(self):
             self.hart.instruction_hardware_breakpoint_count >= 1
 
     def test(self):
-        if not self.hart.honors_tdata1_hmode:
-            # Run to main before setting the breakpoint, because startup code
-            # will otherwise clear the trigger that we set.
-            self.gdb.b("main")
-            self.gdb.c()
+        # Run to main before setting the breakpoint, because startup code
+        # will otherwise clear the trigger that we set.
+        self.gdb.b("main")
+        self.gdb.c()
 
         self.gdb.command("delete")
         #self.gdb.hbreak("rot13")
-        tdata1 = MCONTROL_DMODE(self.hart.xlen)
+        xlen = self.hart.xlen
+        dmstatus = self.gdb.command("monitor riscv dmi_read 0x11")
+        dmstatus_version = int(dmstatus, 16) & 0xf
+        tdata1 = MCONTROL_TYPE(dmstatus_version, xlen)
+        tdata1 |= MCONTROL_DMODE(xlen)
         tdata1 = set_field(tdata1, MCONTROL_ACTION, MCONTROL_ACTION_DEBUG_MODE)
         tdata1 = set_field(tdata1, MCONTROL_MATCH, MCONTROL_MATCH_EQUAL)
         tdata1 |= MCONTROL_M | MCONTROL_S | MCONTROL_U | MCONTROL_EXECUTE
@@ -697,7 +701,7 @@ def test(self):
             if value != tselect:
                 raise TestNotApplicable
             self.gdb.p(f"$tdata1=0x{tdata1:x}")
-            value = self.gdb.p("$tselect")
+            value = self.gdb.p("$tdata1")
             if value == tdata1:
                 break
             self.gdb.p("$tdata1=0")
@@ -710,6 +714,7 @@ def test(self):
             self.gdb.p("$pc")
             assertRegex(output, r"[bB]reakpoint")
             assertIn("rot13 ", output)
+            self.gdb.stepi()
         self.gdb.p("$tdata2=&crc32a")
         self.gdb.c()
         before = self.gdb.p("$pc")
@@ -1396,8 +1401,7 @@ def test(self):
 
 class TriggerDmode(TriggerTest):
     def early_applicable(self):
-        return self.hart.honors_tdata1_hmode and \
-                self.hart.instruction_hardware_breakpoint_count > 0
+        return self.hart.instruction_hardware_breakpoint_count > 0
 
     def check_triggers(self, tdata1_lsbs, tdata2):
         dmode = 1 << (self.hart.xlen-5)

debug/targets.py

@@ -19,12 +19,6 @@ class Hart:
     # defined. Defaults to <name>.lds.
     link_script_path = None
 
-    # Implements dmode in tdata1 as described in the spec. Harts that need
-    # this value set to False are not compliant with the spec (but still usable
-    # as long as running code doesn't try to mess with triggers set by an
-    # external debugger).
-    honors_tdata1_hmode = True
-
     # Address where a r/w/x block of RAM starts, together with its size.
     ram = None
     ram_size = None