/* 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 [31mCONFIG_PPC64[0m /* 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) |