| /* SPDX-License-Identifier: GPL-2.0+ */ |
| * Copyright (c) 2007 Simtec Electronics |
| * Ben Dooks <ben@simtec.co.uk> |
| * S3C2412 Power Manager low-level sleep support |
| #include <linux/linkage.h> |
| #include <asm/assembler.h> |
| .global s3c2412_sleep_enter |
| mov r0, #0 /* argument for coprocessors */ |
| ldr r3, =S3C2410_EINTPEND |
| /* this is called twice, first with the Z flag to ensure that the |
| * instructions have been loaded into the cache, and the second |
| * time to try and suspend the system. |
| mcr p15, 0, r0, c7, c10, 4 |
| mcrne p15, 0, r0, c7, c0, 4 |
| /* if we return from here, it is because an interrupt was |
| * active when we tried to shutdown. Try and ack the IRQ and |
| * retry, as simply returning causes the system to lock. |