projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 2e1ae9c0 LYB |
1 | /* |
| 2 | * Copyright (C) 2012 Freescale Semiconductor, Inc. | |
| 3 | * | |
| 4 | * This program is free software; you can redistribute it and/or | |
| 5 | * modify it under the terms of the GNU General Public License | |
| 6 | * as published by the Free Software Foundation; either version | |
| 7 | * 2 of the License, or (at your option) any later version. | |
| 8 | */ | |
| 9 | ||
| 10 | #include <linux/threads.h> | |
| 2f979de8 | 11 | #include <asm/epapr_hcalls.h> |
| 2e1ae9c0 LYB |
12 | #include <asm/reg.h> |
| 13 | #include <asm/page.h> | |
| 14 | #include <asm/cputable.h> | |
| 15 | #include <asm/thread_info.h> | |
| 16 | #include <asm/ppc_asm.h> | |
| 2f979de8 | 17 | #include <asm/asm-compat.h> |
| 2e1ae9c0 LYB |
18 | #include <asm/asm-offsets.h> |
| 19 | ||
| 2f979de8 LYB |
20 | /* epapr_ev_idle() was derived from e500_idle() */ |
| 21 | _GLOBAL(epapr_ev_idle) | |
| 22 | CURRENT_THREAD_INFO(r3, r1) | |
| 23 | PPC_LL r4, TI_LOCAL_FLAGS(r3) /* set napping bit */ | |
| 24 | ori r4, r4,_TLF_NAPPING /* so when we take an exception */ | |
| 25 | PPC_STL r4, TI_LOCAL_FLAGS(r3) /* it will return to our caller */ | |
| 26 | ||
| 27 | wrteei 1 | |
| 28 | ||
| 29 | idle_loop: | |
| 30 | LOAD_REG_IMMEDIATE(r11, EV_HCALL_TOKEN(EV_IDLE)) | |
| 31 | ||
| 32 | .global epapr_ev_idle_start | |
| 33 | epapr_ev_idle_start: | |
| 34 | li r3, -1 | |
| 35 | nop | |
| 36 | nop | |
| 37 | nop | |
| 38 | ||
| 39 | /* | |
| 40 | * Guard against spurious wakeups from a hypervisor -- | |
| 41 | * only interrupt will cause us to return to LR due to | |
| 42 | * _TLF_NAPPING. | |
| 43 | */ | |
| 44 | b idle_loop | |
| 45 | ||
| 2e1ae9c0 LYB |
46 | /* Hypercall entry point. Will be patched with device tree instructions. */ |
| 47 | .global epapr_hypercall_start | |
| 48 | epapr_hypercall_start: | |
| 49 | li r3, -1 | |
| 50 | nop | |
| 51 | nop | |
| 52 | nop | |
| 53 | blr |