mirror of https://github.com/thesofproject/sof.git
GDB: Context switch for debugging.
Signed-off-by: Marcin Rajwa <marcin.rajwa@linux.intel.com>
This commit is contained in:
Marcin Rajwa
Liam Girdwood
parent
db3d730913
commit
a334567bc5
|
|
@ -657,8 +657,8 @@ AC_CONFIG_FILES([
|
|||
src/platform/intel/cavs/Makefile
|
||||
test/Makefile
|
||||
test/cmocka/Makefile
|
||||
src/include/sof/gdb/Makefile
|
||||
src/gdb/Makefile
|
||||
src/arch/xtensa/include/arch/gdb/Makefile
|
||||
src/arch/xtensa/gdb/Makefile
|
||||
])
|
||||
AC_REQUIRE_AUX_FILE([tap-driver.sh])
|
||||
AC_OUTPUT
|
||||
|
|
|
|||
|
|
@ -8,5 +8,5 @@ SUBDIRS = ipc math audio arch include library host
|
|||
endif
|
||||
|
||||
if BUILD_XTENSA
|
||||
SUBDIRS = include gdb init math audio platform tasks drivers ipc lib arch
|
||||
SUBDIRS = include init math audio platform tasks drivers ipc lib arch
|
||||
endif
|
||||
|
|
|
|||
|
|
@ -99,7 +99,6 @@ sof_LDADD = \
|
|||
../../audio/libaudio.a \
|
||||
../../drivers/libdrivers.la \
|
||||
../../math/libsof_math.a \
|
||||
../../gdb/libgdb.a \
|
||||
-lgcc
|
||||
|
||||
if BUILD_XTENSA_SMP
|
||||
|
|
|
|||
|
|
@ -2,6 +2,7 @@ noinst_LIBRARIES = libgdb.a
|
|||
|
||||
libgdb_a_SOURCES = \
|
||||
init.S
|
||||
debugexception.S
|
||||
|
||||
libgdb_a_CFLAGS = \
|
||||
$(AM_CFLAGS) \
|
||||
|
|
@ -0,0 +1,244 @@
|
|||
/*
|
||||
* Copyright (c) 2018, Intel Corporation
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions are met:
|
||||
* * Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* * Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
* * Neither the name of the Intel Corporation nor the
|
||||
* names of its contributors may be used to endorse or promote products
|
||||
* derived from this software without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
||||
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
|
||||
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
||||
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
||||
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
||||
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
||||
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
||||
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
* Author: Marcin Rajwa <marcin.rajwa@linux.intel.com>
|
||||
*
|
||||
* Debug context switch.
|
||||
*
|
||||
*/
|
||||
|
||||
#include <arch/gdb/xtensa-defs.h>
|
||||
#define DENSITY_BREAK_INS_IDENT 0x40
|
||||
#define NEXT_INST_OFFSET 0x03
|
||||
#define PS_EXCM_EXCEPTION_MODE 0x10
|
||||
#define PS_EXCM_MODE_MASK (~PS_EXCM_EXCEPTION_MODE)
|
||||
#define DEBUG_GDB_MEM_LOC 0x9E008060
|
||||
|
||||
/*
|
||||
Save special register designated by 'reg' into
|
||||
backup space calculated by offset 'loc * 4' from
|
||||
memory pointed by a3.
|
||||
*/
|
||||
.macro SAVE_ reg, loc
|
||||
rsr a1, \reg
|
||||
s32i a1, a3, \loc * 4
|
||||
.endm
|
||||
|
||||
.macro SAVE reg
|
||||
SAVE_ \reg, \reg
|
||||
.endm
|
||||
|
||||
/*
|
||||
Load special register designated by 'reg' from
|
||||
backup space calculated by offset 'loc * 4' from
|
||||
memory pointed by a3.
|
||||
*/
|
||||
.macro LOAD_ reg, loc
|
||||
l32i a1, a3, \loc * 4
|
||||
wsr a1, \reg
|
||||
.endm
|
||||
|
||||
.macro LOAD reg
|
||||
LOAD_ \reg, \reg
|
||||
.endm
|
||||
|
||||
|
||||
|
||||
.text
|
||||
|
||||
/*
|
||||
Temporary stack for context switch
|
||||
TODO: move it to dedicated GDB_STACK section
|
||||
*/
|
||||
|
||||
gdb_stack:
|
||||
.fill 0x1000 , 4 , 0
|
||||
gdb_stack_end:
|
||||
|
||||
.global DebugExceptionEntry
|
||||
.align 4
|
||||
|
||||
/*
|
||||
Backup important special registers plus
|
||||
all regular ones (whole register file).
|
||||
Change EXCM field of PS back to normal mode
|
||||
after an interrupt took place.
|
||||
*/
|
||||
DebugExceptionEntry:
|
||||
|
||||
movi a2, aregs
|
||||
s32i a0, a2, 0
|
||||
s32i a1, a2, 4
|
||||
rsr a1, DEBUG_EXCSAVE
|
||||
s32i a1, a2, 8
|
||||
s32i a3, a2, 12
|
||||
|
||||
movi a3, sregs
|
||||
SAVE LBEG
|
||||
SAVE LEND
|
||||
SAVE LCOUNT
|
||||
SAVE SAR
|
||||
SAVE WINDOWBASE
|
||||
SAVE WINDOWSTART
|
||||
|
||||
rsr a1, DEBUG_PC
|
||||
l8ui a2, a1, 1
|
||||
movi a0, DENSITY_BREAK_INS_IDENT
|
||||
bne a2, a0, 1f
|
||||
addi a1, a1, NEXT_INST_OFFSET
|
||||
1:
|
||||
s32i a1, a3, DEBUG_PC * 4
|
||||
|
||||
SAVE EXCSAVE_1
|
||||
SAVE_ DEBUG_PS, PS
|
||||
SAVE EXCCAUSE
|
||||
SAVE DEBUGCAUSE
|
||||
SAVE EXCVADDR
|
||||
|
||||
/*
|
||||
(XCHAL_NUM_AREGS / 4 - 1) - A number which holds information on how many
|
||||
registers are left to backup. Divide by four since we backup registers
|
||||
in group of four. Minus one, since one group has already been saved.
|
||||
*/
|
||||
movi a1, XCHAL_NUM_AREGS / 4 - 1
|
||||
movi a2, aregs
|
||||
1:
|
||||
s32i a4, a2, 16
|
||||
s32i a5, a2, 20
|
||||
s32i a6, a2, 24
|
||||
s32i a7, a2, 28
|
||||
|
||||
addi a6, a2, 16
|
||||
addi a5, a1, -1
|
||||
rotw 1
|
||||
bnez a1, 1b
|
||||
|
||||
movi a1, 1
|
||||
wsr a1, windowstart
|
||||
movi a0, 0
|
||||
wsr a0, windowbase
|
||||
rsync
|
||||
|
||||
/* Setup of stack frame with 20 bytes for extra save area */
|
||||
movi a0, 0
|
||||
movi a1, gdb_stack + STACK_SIZE - 20
|
||||
rsr a2, PS
|
||||
|
||||
/* Set exception mode back to normal */
|
||||
movi a3, PS_EXCM_MODE_MASK
|
||||
and a2, a2, a3
|
||||
wsr a2, PS
|
||||
rsync
|
||||
|
||||
movi a4, handle_exception
|
||||
callx4 a4
|
||||
|
||||
/*
|
||||
Restore important special registers plus
|
||||
all regular ones (whole register file).
|
||||
Change EXCM field of PS back to exception mode
|
||||
and return from interrupt.
|
||||
*/
|
||||
DebugExceptionExit:
|
||||
movi a2, DebugExceptionEntry
|
||||
wsr a2, DEBUG_EXCSAVE
|
||||
|
||||
rsr a4, PS
|
||||
movi a3, PS_EXCM_EXCEPTION_MODE
|
||||
or a4, a4, a3
|
||||
wsr a4, PS
|
||||
rsync
|
||||
|
||||
movi a3, sregs
|
||||
LOAD LBEG
|
||||
LOAD LEND
|
||||
LOAD LCOUNT
|
||||
LOAD SAR
|
||||
LOAD WINDOWBASE
|
||||
rsync
|
||||
|
||||
movi a3, sregs
|
||||
LOAD WINDOWSTART
|
||||
LOAD DEBUG_PC
|
||||
LOAD EXCSAVE_1
|
||||
LOAD EXCCAUSE
|
||||
LOAD EXCVADDR
|
||||
LOAD INTENABLE
|
||||
rsync
|
||||
|
||||
movi a6, aregs
|
||||
movi a5, XCHAL_NUM_AREGS / 4 - 2
|
||||
1:
|
||||
l32i a0, a6, 0
|
||||
l32i a1, a6, 4
|
||||
l32i a2, a6, 8
|
||||
l32i a3, a6, 12
|
||||
|
||||
beqz a5, 2f
|
||||
addi a10, a6, 16
|
||||
addi a9, a5, -1
|
||||
rotw 1
|
||||
j 1b
|
||||
2:
|
||||
l32i a4, a6, 16
|
||||
l32i a5, a6, 20
|
||||
l32i a7, a6, 28
|
||||
l32i a6, a6, 24
|
||||
rotw 2
|
||||
|
||||
rfi XCHAL_DEBUGLEVEL
|
||||
|
||||
|
||||
/*
|
||||
Put some important interrupt related registers into memory window
|
||||
pointed by DEBUG_GDB_MEM_LOC
|
||||
*/
|
||||
.global debug_exception
|
||||
.align 4
|
||||
|
||||
debug_exception:
|
||||
|
||||
entry a1, 16
|
||||
movi a3, DEBUG_GDB_MEM_LOC
|
||||
l32i a4, a2, 0 //load 4 bytes of message ID from incoming argv
|
||||
rsr a4, EPC_1
|
||||
rsr a5, EPC_2
|
||||
rsr a6, EXCCAUSE
|
||||
rsr a7, DEPC
|
||||
rsr a8, DEBUG_PS
|
||||
|
||||
s32i a4, a3, 0
|
||||
s32i a5, a3, 4
|
||||
s32i a6, a3, 8
|
||||
s32i a7, a3, 12
|
||||
s32i a8, a3, 16
|
||||
|
||||
isync
|
||||
rsync
|
||||
retw
|
||||
|
||||
.size debug_exception, . -debug_exception
|
||||
|
|
@ -31,7 +31,7 @@
|
|||
*
|
||||
*/
|
||||
|
||||
#include <sof/gdb/xtensa-defs.h>
|
||||
#include <arch/gdb/xtensa-defs.h>
|
||||
|
||||
.text
|
||||
.global initDebugException
|
||||
|
|
@ -28,7 +28,7 @@
|
|||
#ifdef SIMULATOR
|
||||
#include <xtensa/simcall.h>
|
||||
#endif
|
||||
#include <sof/gdb/xtensa-defs.h>
|
||||
#include <arch/gdb/xtensa-defs.h>
|
||||
|
||||
#if XCHAL_HAVE_DEBUG && XCHAL_HAVE_EXCEPTIONS
|
||||
|
||||
|
|
|
|||
|
|
@ -28,7 +28,7 @@
|
|||
#ifdef SIMULATOR
|
||||
#include <xtensa/simcall.h>
|
||||
#endif
|
||||
#include <sof/gdb/xtensa-defs.h>
|
||||
#include <arch/gdb/xtensa-defs.h>
|
||||
|
||||
#if XCHAL_HAVE_DEBUG && XCHAL_HAVE_EXCEPTIONS
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue