1 /*
2 * linux/include/asm-arm/arch-at91rm9200/system.h
3 *
4 * Copyright (C) 2003 SAN People
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20
21 #ifndef __ASM_ARCH_SYSTEM_H
22 #define __ASM_ARCH_SYSTEM_H
23
24 #include <asm/arch/hardware.h>
25
arch_idle(void)26 static inline void arch_idle(void)
27 {
28 /*
29 * Disable the processor clock. The processor will be automatically
30 * re-enabled by an interrupt or by a reset.
31 */
32 // AT91_SYS->PMC_SCDR = AT91C_PMC_PCK;
33
34 /*
35 * Set the processor (CP15) into 'Wait for Interrupt' mode.
36 * Unlike disabling the processor clock via the PMC (above)
37 * this allows the processor to be woken via JTAG.
38 */
39 cpu_do_idle();
40 }
41
arch_reset(char mode)42 static inline void arch_reset(char mode)
43 {
44 /*
45 * Perform a hardware reset with the use of the Watchdog timer.
46 */
47 AT91_SYS->ST_WDMR = AT91C_ST_RSTEN | AT91C_ST_EXTEN | 1 ;
48 AT91_SYS->ST_CR = AT91C_ST_WDRST;
49 }
50
51 #endif
52