| /* | |
| * 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> | |
| #include <asm/export.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 | |
| EXPORT_SYMBOL(epapr_hypercall_start) |