| 1 | /* |
| 2 | * Copyright (C) STMicroelectronics 2009 |
| 3 | * Copyright (C) ST-Ericsson SA 2010 |
| 4 | * |
| 5 | * License Terms: GNU General Public License v2 |
| 6 | * Based on ARM realview platform |
| 7 | * |
| 8 | * Author: Sundar Iyer <sundar.iyer@stericsson.com> |
| 9 | * |
| 10 | */ |
| 11 | #include <linux/kernel.h> |
| 12 | #include <linux/errno.h> |
| 13 | #include <linux/smp.h> |
| 14 | |
| 15 | #include <asm/smp_plat.h> |
| 16 | |
| 17 | #include "setup.h" |
| 18 | |
| 19 | /* |
| 20 | * platform-specific code to shutdown a CPU |
| 21 | * |
| 22 | * Called with IRQs disabled |
| 23 | */ |
| 24 | void ux500_cpu_die(unsigned int cpu) |
| 25 | { |
| 26 | /* directly enter low power state, skipping secure registers */ |
| 27 | for (;;) { |
| 28 | __asm__ __volatile__("dsb\n\t" "wfi\n\t" |
| 29 | : : : "memory"); |
| 30 | if (pen_release == cpu_logical_map(cpu)) { |
| 31 | /* |
| 32 | * OK, proper wakeup, we're done |
| 33 | */ |
| 34 | break; |
| 35 | } |
| 36 | } |
| 37 | } |