Openocd how to implement watchpoint in cortex_a.c ?

fatalfeel — Thu, 28 Jan 2016 19:25:13 GMT

how to implement in cortex_a.c ?

////

in cortex_m.h

#define DWT_COMP0 0xE0001020

#define DWT_MASK0 0xE0001024

#define DWT_FUNCTION0 0xE0001028

in cortex_m.c

for (i = 0; i < cm->dwt_num_comp; i++, comparator++)

{

int j;

comparator->dwt_comparator_address = DWT_COMP0 + 0x10 * i;

for (j = 0; j < 3; j++, reg++)

cortex_m_dwt_addreg(target, cache->reg_list + reg, dwt_comp + 3 * i + j);

target_write_u32(target, comparator->dwt_comparator_address + 8, 0);

}

//do add watchpoint

comparator->comp = watchpoint->address;

target_write_u32(target, comparator->dwt_comparator_address + 0, comparator->comp);

comparator->mask = mask;

target_write_u32(target, comparator->dwt_comparator_address + 4, comparator->mask);

switch (watchpoint->rw)

{

case WPT_READ:

comparator->function = 5;

break;

case WPT_WRITE:

comparator->function = 6;

break;

case WPT_ACCESS:

comparator->function = 7;

break;

}

target_write_u32(target, comparator->dwt_comparator_address + 8, comparator->function);

////////////////////////////

in armv7a.h for cortex a8 a9

#define CPUDBG_WVR_BASE 0x180

#define CPUDBG_WCR_BASE 0x1C0

how to implement in cortex_a.c ?

1. the address/mask/function is CPUDBG_WVR_BASE+0 / CPUDBG_WVR_BASE+4 / CPUDBG_WVR_BASE+8 ?

2. the address/mask/function is CPUDBG_WCR_BASE+0 ......+4......+8?

3. WPT_READ/WPT_WRITE/WPT_ACCESS is 5/6/7 on cortex a8 a9?

Re: Openocd how to implement watchpoint in cortex_a.c ?

fatalfeel — Thu, 28 Jan 2016 20:16:33 GMT

ok may a little idea here

break

http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0388e/Babcdabj.html

watch

http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0388e/Babhjfhh.html

looks

break point reg / watch point reg

Breakpoint address mask = Watchpoint address mask

Secure state access control = Secure state access control

Byte address select = Byte address select

sp =sp

B = E

only implement watch point L/S -> Load store access

good~~~ will do it right~~~

Re: Openocd how to implement watchpoint in cortex_a.c ?

fatalfeel — Fri, 29 Jan 2016 03:52:03 GMT

SparkFun Electronics • View topic - Help implement openocd in cortex_a a8 a9 watchpoint~~

done it~~~~

topic Re: Openocd how to implement watchpoint in cortex_a.c ? in i.MX Processors

Openocd how to implement watchpoint in cortex_a.c ?

Re: Openocd how to implement watchpoint in cortex_a.c ?

Re: Openocd how to implement watchpoint in cortex_a.c ?