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/*
* Copyright (C) 2012 Freescale Semiconductor, Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/threads.h>
#include <asm/epapr_hcalls.h>
#include <asm/reg.h>
#include <asm/page.h>
#include <asm/cputable.h>
#include <asm/thread_info.h>
#include <asm/ppc_asm.h>
#include <asm/asm-compat.h>
#include <asm/asm-offsets.h>
/* epapr_ev_idle() was derived from e500_idle() */
_GLOBAL(epapr_ev_idle)
CURRENT_THREAD_INFO(r3, r1)
PPC_LL r4, TI_LOCAL_FLAGS(r3) /* set napping bit */
ori r4, r4,_TLF_NAPPING /* so when we take an exception */
PPC_STL r4, TI_LOCAL_FLAGS(r3) /* it will return to our caller */
wrteei 1
idle_loop:
LOAD_REG_IMMEDIATE(r11, EV_HCALL_TOKEN(EV_IDLE))
.global epapr_ev_idle_start
epapr_ev_idle_start:
li r3, -1
nop
nop
nop
/*
* Guard against spurious wakeups from a hypervisor --
* only interrupt will cause us to return to LR due to
* _TLF_NAPPING.
*/
b idle_loop
/* Hypercall entry point. Will be patched with device tree instructions. */
.global epapr_hypercall_start
epapr_hypercall_start:
li r3, -1
nop
nop
nop
blr
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