arch/arm/mach-pxa/standby.S

   1 /*
   2  * PXA27x standby mode
   3  *
   4  * Author: David Burrage
   5  *
   6  * 2005 (c) MontaVista Software, Inc. This file is licensed under
   7  * the terms of the GNU General Public License version 2. This program
   8  * is licensed "as is" without any warranty of any kind, whether express
   9  * or implied.
  10  */
  11
  12 #include <linux/config.h>
  13 #include <linux/linkage.h>
  14 #include <asm/assembler.h>
  15 #include <asm/hardware.h>
  16
  17 #include <asm/arch/pxa-regs.h>
  18
  19                 .text
  20
  21 ENTRY(pxa_cpu_standby)
  22         ldr     r0, =PSSR
  23         mov     r1, #(PSSR_PH | PSSR_STS)
  24         mov     r2, #2
  25         mov     r3, #UNCACHED_PHYS_0    @ Read mem context in.
  26         ldr     ip, [r3]
  27         b       1f
  28
  29         .align  5
  30 1:      mcr     p14, 0, r2, c7, c0, 0   @ put the system into Standby
  31         str     r1, [r0]                @ make sure PSSR_PH/STS are clear
  32         mov     pc, lr