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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>
- #ifndef CONFIG_PPC64
- /* 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
- #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
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