mirror of https://gitee.com/openkylin/linux.git
53 lines
1.1 KiB
ArmAsm
53 lines
1.1 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
/*
|
|
* Copyright (C) 2012 Freescale Semiconductor, Inc.
|
|
*/
|
|
|
|
#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>
|
|
#include <asm/export.h>
|
|
|
|
#ifndef CONFIG_PPC64
|
|
/* epapr_ev_idle() was derived from e500_idle() */
|
|
_GLOBAL(epapr_ev_idle)
|
|
PPC_LL r4, TI_LOCAL_FLAGS(r2) /* set napping bit */
|
|
ori r4, r4,_TLF_NAPPING /* so when we take an exception */
|
|
PPC_STL r4, TI_LOCAL_FLAGS(r2) /* 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
|
|
#endif
|
|
|
|
/* Hypercall entry point. Will be patched with device tree instructions. */
|
|
.global epapr_hypercall_start
|
|
epapr_hypercall_start:
|
|
li r3, -1
|
|
nop
|
|
nop
|
|
nop
|
|
blr
|
|
EXPORT_SYMBOL(epapr_hypercall_start)
|