/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Copyright (C) 2012 Freescale Semiconductor, Inc.
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*/
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#include <linux/threads.h>
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#include <asm/epapr_hcalls.h>
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#include <asm/reg.h>
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#include <asm/page.h>
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#include <asm/cputable.h>
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#include <asm/thread_info.h>
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#include <asm/ppc_asm.h>
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#include <asm/asm-compat.h>
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#include <asm/asm-offsets.h>
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#include <asm/export.h>
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#ifndef CONFIG_PPC64
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/* epapr_ev_idle() was derived from e500_idle() */
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_GLOBAL(epapr_ev_idle)
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PPC_LL r4, TI_LOCAL_FLAGS(r2) /* set napping bit */
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ori r4, r4,_TLF_NAPPING /* so when we take an exception */
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PPC_STL r4, TI_LOCAL_FLAGS(r2) /* it will return to our caller */
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wrteei 1
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idle_loop:
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LOAD_REG_IMMEDIATE(r11, EV_HCALL_TOKEN(EV_IDLE))
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.global epapr_ev_idle_start
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epapr_ev_idle_start:
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li r3, -1
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nop
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nop
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nop
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/*
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* Guard against spurious wakeups from a hypervisor --
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* only interrupt will cause us to return to LR due to
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* _TLF_NAPPING.
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*/
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b idle_loop
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#endif
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/* Hypercall entry point. Will be patched with device tree instructions. */
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.global epapr_hypercall_start
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epapr_hypercall_start:
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li r3, -1
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nop
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nop
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nop
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blr
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EXPORT_SYMBOL(epapr_hypercall_start)
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