mirror of
git://git.code.sf.net/p/openocd/code
synced 2025-07-19 13:02:18 +10:00
18bbffb6f7
Change-Id: Ib5c3c505a067d0e285a7b074cb6fddebfa6dda1e Signed-off-by: Paul Fertser <fercerpav@gmail.com> Reviewed-on: http://openocd.zylin.com/1904 Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk> Tested-by: Spencer Oliver <spen@spen-soft.co.uk>
52 lines
2.1 KiB
C
52 lines
2.1 KiB
C
/***************************************************************************
|
|
* Copyright (C) 2007 by Pavel Chromy *
|
|
* chromy@asix.cz *
|
|
* *
|
|
* This program is free software; you can redistribute it and/or modify *
|
|
* it under the terms of the GNU General Public License as published by *
|
|
* the Free Software Foundation; either version 2 of the License, or *
|
|
* (at your option) any later version. *
|
|
* *
|
|
* This program is distributed in the hope that it will be useful, *
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
|
|
* GNU General Public License for more details. *
|
|
* *
|
|
* You should have received a copy of the GNU General Public License *
|
|
* along with this program; if not, write to the *
|
|
* Free Software Foundation, Inc., *
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
|
|
***************************************************************************/
|
|
#include "dcc.h"
|
|
|
|
|
|
/* debug channel read (debugger->MCU) */
|
|
uint32 dcc_rd(void)
|
|
{
|
|
volatile uint32 dcc_reg;
|
|
|
|
do {
|
|
asm volatile ("mrc p14, 0, %0, C0, C0" : "=r" (dcc_reg) :);
|
|
} while ((dcc_reg&1) == 0);
|
|
|
|
asm volatile ("mrc p14, 0, %0, C1, C0" : "=r" (dcc_reg) :);
|
|
return dcc_reg;
|
|
}
|
|
|
|
|
|
/* debug channel write (MCU->debugger) */
|
|
int dcc_wr(uint32 data)
|
|
{
|
|
volatile uint32 dcc_reg;
|
|
|
|
do {
|
|
asm volatile ("mrc p14, 0, %0, C0, C0" : "=r" (dcc_reg) :);
|
|
/* operation controled by master, cancel operation
|
|
upon reception of data for immediate response */
|
|
if (dcc_reg&1) return -1;
|
|
} while (dcc_reg&2);
|
|
|
|
asm volatile ("mcr p14, 0, %0, C1, C0" : : "r" (data));
|
|
return 0;
|
|
}
|