2012-03-15 04:52:13 -06:00
|
|
|
/*
|
|
|
|
|
* 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>
|
2012-07-02 23:48:53 -06:00
|
|
|
#include <asm/epapr_hcalls.h>
|
2012-03-15 04:52:13 -06:00
|
|
|
#include <asm/reg.h>
|
|
|
|
|
#include <asm/page.h>
|
|
|
|
|
#include <asm/cputable.h>
|
|
|
|
|
#include <asm/thread_info.h>
|
|
|
|
|
#include <asm/ppc_asm.h>
|
2012-07-02 23:48:53 -06:00
|
|
|
#include <asm/asm-compat.h>
|
2012-03-15 04:52:13 -06:00
|
|
|
#include <asm/asm-offsets.h>
|
|
|
|
|
|
2012-07-02 23:48:53 -06:00
|
|
|
/* 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
|
|
|
|
|
|
2012-03-15 04:52:13 -06:00
|
|
|
/* Hypercall entry point. Will be patched with device tree instructions. */
|
|
|
|
|
.global epapr_hypercall_start
|
|
|
|
|
epapr_hypercall_start:
|
|
|
|
|
li r3, -1
|
|
|
|
|
nop
|
|
|
|
|
nop
|
|
|
|
|
nop
|
|
|
|
|
blr
|
