target/armv7m: rework Cortex-M register handling part 1

[fw/openocd] / src / target / startup.tcl

diff --git a/src/target/startup.tcl b/src/target/startup.tcl
index d68417e808efd135c5bb4d5d92ba55866effef68..ca39b1816111914ebc2ffe9f399c744fbafa8fdb 100644 (file)
--- a/src/target/startup.tcl
+++ b/src/target/startup.tcl
@@ -63,8 +63,14 @@ proc ocd_process_reset_inner { MODE } {
 
        # Examine all targets on enabled taps.
        foreach t $targets {
-               if {[jtag tapisenabled [$t cget -chain-position]]} {
-                       $t arp_examine
+               if {![using_jtag] || [jtag tapisenabled [$t cget -chain-position]]} {
+                       $t invoke-event examine-start
+                       set err [catch "$t arp_examine allow-defer"]
+                       if { $err } {
+                               $t invoke-event examine-fail
+                       } else {
+                               $t invoke-event examine-end
+                       }
                }
        }
 
@@ -75,7 +81,7 @@ proc ocd_process_reset_inner { MODE } {
        }
        foreach t $targets {
                # C code needs to know if we expect to 'halt'
-               if {[jtag tapisenabled [$t cget -chain-position]]} {
+               if {![using_jtag] || [jtag tapisenabled [$t cget -chain-position]]} {
                        $t arp_reset assert $halt
                }
        }
@@ -90,7 +96,7 @@ proc ocd_process_reset_inner { MODE } {
        }
        foreach t $targets {
                # Again, de-assert code needs to know if we 'halt'
-               if {[jtag tapisenabled [$t cget -chain-position]]} {
+               if {![using_jtag] || [jtag tapisenabled [$t cget -chain-position]]} {
                        $t arp_reset deassert $halt
                }
        }
@@ -103,11 +109,17 @@ proc ocd_process_reset_inner { MODE } {
        # first executing any instructions.
        if { $halt } {
                foreach t $targets {
-                       if {[jtag tapisenabled [$t cget -chain-position]] == 0} {
+                       if {[using_jtag] && ![jtag tapisenabled [$t cget -chain-position]]} {
+                               continue
+                       }
+
+                       # don't wait for targets where examination is deferred
+                       # they can not be halted anyway at this point
+                       if { ![$t was_examined] && [$t examine_deferred] } {
                                continue
                        }
 
-                       # Wait upto 1 second for target to halt.  Why 1sec? Cause
+                       # Wait up to 1 second for target to halt. Why 1sec? Cause
                        # the JTAG tap reset signal might be hooked to a slow
                        # resistor/capacitor circuit - and it might take a while
                        # to charge
@@ -127,7 +139,13 @@ proc ocd_process_reset_inner { MODE } {
        #Pass 2 - if needed "init"
        if { 0 == [string compare init $MODE] } {
                foreach t $targets {
-                       if {[jtag tapisenabled [$t cget -chain-position]] == 0} {
+                       if {[using_jtag] && ![jtag tapisenabled [$t cget -chain-position]]} {
+                               continue
+                       }
+
+                       # don't wait for targets where examination is deferred
+                       # they can not be halted anyway at this point
+                       if { ![$t was_examined] && [$t examine_deferred] } {
                                continue
                        }
 
@@ -144,6 +162,21 @@ proc ocd_process_reset_inner { MODE } {
        }
 }
 
+proc using_jtag {} {
+       set _TRANSPORT [ transport select ]
+       expr { [ string first "jtag" $_TRANSPORT ] != -1 }
+}
+
+proc using_swd {} {
+       set _TRANSPORT [ transport select ]
+       expr { [ string first "swd" $_TRANSPORT ] != -1 }
+}
+
+proc using_hla {} {
+       set _TRANSPORT [ transport select ]
+       expr { [ string first "hla" $_TRANSPORT ] != -1 }
+}
+
 #########
 
 # Temporary migration aid.  May be removed starting in January 2011.
@@ -151,3 +184,42 @@ proc armv4_5 params {
        echo "DEPRECATED! use 'arm $params' not 'armv4_5 $params'"
        arm $params
 }
+
+# Target/chain configuration scripts can either execute commands directly
+# or define a procedure which is executed once all configuration
+# scripts have completed.
+#
+# By default(classic) the config scripts will set up the target configuration
+proc init_targets {} {
+}
+
+proc set_default_target_event {t e s} {
+       if {[$t cget -event $e] == ""} {
+               $t configure -event $e $s
+       }
+}
+
+proc init_target_events {} {
+       set targets [target names]
+
+       foreach t $targets {
+               set_default_target_event $t gdb-flash-erase-start "reset init"
+               set_default_target_event $t gdb-flash-write-end "reset halt"
+               set_default_target_event $t gdb-attach "halt 1000"
+       }
+}
+
+# Additionally board config scripts can define a procedure init_board that will be executed after init and init_targets
+proc init_board {} {
+}
+
+# deprecated target name cmds
+proc cortex_m3 args {
+       echo "DEPRECATED! use 'cortex_m' not 'cortex_m3'"
+       eval cortex_m $args
+}
+
+proc cortex_a8 args {
+       echo "DEPRECATED! use 'cortex_a' not 'cortex_a8'"
+       eval cortex_a $args
+}