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cortex_a: faster debug init 

Don't use atomic dap operations when not necessary

Change-Id: Idc6dcd2bda95f7994852df4ae2a588976f4c9010
Signed-off-by: Matthias Welwarsky <matthias.welwarsky@sysgo.com>
Reviewed-on: http://openocd.zylin.com/4142
Tested-by: jenkins
Reviewed-by: Matthias Welwarsky <matthias@welwarsky.de>
This commit is contained in:
Matthias Welwarsky 2017-04-06 08:47:03 +02:00 committed by Matthias Welwarsky
parent 0056037d68
commit 78a4b6607e
1 changed files with 7 additions and 3 deletions
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10
src/target/cortex_a.c
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@ -206,23 +206,27 @@ static int cortex_a_init_debug_access(struct target *target)
/* lock memory-mapped access to debug registers to prevent /* lock memory-mapped access to debug registers to prevent
* software interference */ * software interference */
retval = mem_ap_write_atomic_u32(armv7a->debug_ap, retval = mem_ap_write_u32(armv7a->debug_ap,
armv7a->debug_base + CPUDBG_LOCKACCESS, 0); armv7a->debug_base + CPUDBG_LOCKACCESS, 0);
if (retval != ERROR_OK) if (retval != ERROR_OK)
return retval; return retval;
/* Disable cacheline fills and force cache write-through in debug state */ /* Disable cacheline fills and force cache write-through in debug state */
retval = mem_ap_write_atomic_u32(armv7a->debug_ap, retval = mem_ap_write_u32(armv7a->debug_ap,
armv7a->debug_base + CPUDBG_DSCCR, 0); armv7a->debug_base + CPUDBG_DSCCR, 0);
if (retval != ERROR_OK) if (retval != ERROR_OK)
return retval; return retval;
/* Disable TLB lookup and refill/eviction in debug state */ /* Disable TLB lookup and refill/eviction in debug state */
retval = mem_ap_write_atomic_u32(armv7a->debug_ap, retval = mem_ap_write_u32(armv7a->debug_ap,
armv7a->debug_base + CPUDBG_DSMCR, 0); armv7a->debug_base + CPUDBG_DSMCR, 0);
if (retval != ERROR_OK) if (retval != ERROR_OK)
return retval; return retval;
retval = dap_run(armv7a->debug_ap->dap);
if (retval != ERROR_OK)
return retval;
/* Enabling of instruction execution in debug mode is done in debug_entry code */ /* Enabling of instruction execution in debug mode is done in debug_entry code */
/* Resync breakpoint registers */ /* Resync breakpoint registers */