auracaster/openocd
3
0
Fork 1
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

target/arc: Introduce Actionpoints support

Browse Source 
Actionpoint mechanism allows to setup HW breakpoints and watchpoints on Synopsys ARC CPUs.
This mechanism is controlled by DEBUG register and by a set of auxilary registers.
Each actionpoint is controlled by 3 aux registers: Actionpoint(AP) match mask(AP_AMM),
AP match value(AP_AMV) and AP control(AC).

Note: some fields of actionpoint_t structure will be used in further
support of watchpoints.

Change-Id: I4efb24675f247cc19d9122501c9e63c3126fcab4
Signed-off-by: Evgeniy Didin <didin@synopsys.com>
Reviewed-on: http://openocd.zylin.com/5763
Tested-by: jenkins
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>
This commit is contained in:
Evgeniy Didin
2020-07-10 14:52:35 +03:00
committed by Antonio Borneo
parent 07df04b3b1
commit 8fea8460db
4 changed files with 418 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

58
tcl/cpu/arc/v2.tcl
View File

@@ -30,6 +30,32 @@ proc arc_v2_examine_target { {target ""} } {
r13 r14 r15 r16 r17 r18 r19 r20 r21 r22 r23 r24 r25 \
gp fp sp ilink r30 blink lp_count pcl
# Actionpoints
if { [arc get-reg-field ap_build version] == 5 } {
set ap_build_type [arc get-reg-field ap_build type]
# AP_BUILD.TYPE > 0b0110 is reserved in current ISA.
# Current ISA supports up to 8 actionpoints.
if { $ap_build_type < 8 } {
# Two LSB bits of AP_BUILD.TYPE define amount of actionpoints:
# 0b00 - 2 actionpoints
# 0b01 - 4 actionpoints
# 0b10 - 8 actionpoints
# 0b11 - reserved.
set ap_num [expr 0x2 << ($ap_build_type & 3)]
# Expression on top may produce 16 action points - which is a
# reserved value for now.
if { $ap_num < 16 } {
# Enable actionpoint registers
for {set i 0} {$i < $ap_num} {incr i} {
arc set-reg-exists ap_amv$i ap_amm$i ap_ac$i
}
# Set amount of actionpoints
arc num-actionpoints $ap_num
}
}
}
# DCCM
set dccm_version [arc get-reg-field dccm_build version]
if { $dccm_version == 3 || $dccm_version == 4 } {
@@ -213,6 +239,30 @@ proc arc_v2_init_regs { } {
0x018 aux_dccm int
0x208 aux_iccm int
0x220 ap_amv0 uint32
0x221 ap_amm0 uint32
0x222 ap_ac0 ap_control_t
0x223 ap_amv1 uint32
0x224 ap_amm1 uint32
0x225 ap_ac1 ap_control_t
0x226 ap_amv2 uint32
0x227 ap_amm2 uint32
0x228 ap_ac2 ap_control_t
0x229 ap_amv3 uint32
0x22A ap_amm3 uint32
0x22B ap_ac3 ap_control_t
0x22C ap_amv4 uint32
0x22D ap_amm4 uint32
0x22E ap_ac4 ap_control_t
0x22F ap_amv5 uint32
0x230 ap_amm5 uint32
0x231 ap_ac5 ap_control_t
0x232 ap_amv6 uint32
0x233 ap_amm6 uint32
0x234 ap_ac6 ap_control_t
0x235 ap_amv7 uint32
0x236 ap_amm7 uint32
0x237 ap_ac7 ap_control_t
0x400 eret code_ptr
0x401 erbta code_ptr
@@ -285,4 +335,12 @@ proc arc_v2_init_regs { } {
proc arc_v2_reset { {target ""} } {
arc_common_reset $target
# Disable all actionpoints. Cannot write via regcache yet, because it will
# not be flushed and all changes to registers will get lost. Therefore has
# to write directly via JTAG layer...
set num_ap [arc num-actionpoints]
for {set i 0} {$i < $num_ap} {incr i} {
arc jtag set-aux-reg [expr 0x222 + $i * 3] 0
}
}