include/asm-arm/arch-at91rm9200/system.h

   1 /*
   2  * 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/hardware.h>
  25
  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_write(AT91_PMC_SCDR, AT91_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
  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_write(AT91_ST_WDMR, AT91_ST_RSTEN | AT91_ST_EXTEN | 1);
  48         at91_sys_write(AT91_ST_CR, AT91_ST_WDRST);
  49 }
  50
  51 #define ARCH_ID_AT91RM9200      0x09200080
  52 #define ARCH_ID_AT91SAM9261     0x019000a0
  53
  54 static inline unsigned long arch_identify(void)
  55 {
  56         return at91_sys_read(AT91_DBGU_CIDR) & (AT91_CIDR_EPROC | AT91_CIDR_ARCH);
  57 }
  58
  59 #endif