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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> |
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18 | #include <asm/asm-offsets.h> |
19 | ||
f070986a | 20 | #ifndef CONFIG_PPC64 |
2f979de8 LYB |
21 | /* epapr_ev_idle() was derived from e500_idle() */ |
22 | _GLOBAL(epapr_ev_idle) | |
23 | CURRENT_THREAD_INFO(r3, r1) | |
24 | PPC_LL r4, TI_LOCAL_FLAGS(r3) /* set napping bit */ | |
25 | ori r4, r4,_TLF_NAPPING /* so when we take an exception */ | |
26 | PPC_STL r4, TI_LOCAL_FLAGS(r3) /* it will return to our caller */ | |
27 | ||
28 | wrteei 1 | |
29 | ||
30 | idle_loop: | |
31 | LOAD_REG_IMMEDIATE(r11, EV_HCALL_TOKEN(EV_IDLE)) | |
32 | ||
33 | .global epapr_ev_idle_start | |
34 | epapr_ev_idle_start: | |
35 | li r3, -1 | |
36 | nop | |
37 | nop | |
38 | nop | |
39 | ||
40 | /* | |
41 | * Guard against spurious wakeups from a hypervisor -- | |
42 | * only interrupt will cause us to return to LR due to | |
43 | * _TLF_NAPPING. | |
44 | */ | |
45 | b idle_loop | |
f070986a | 46 | #endif |
2f979de8 | 47 | |
2e1ae9c0 LYB |
48 | /* Hypercall entry point. Will be patched with device tree instructions. */ |
49 | .global epapr_hypercall_start | |
50 | epapr_hypercall_start: | |
51 | li r3, -1 | |
52 | nop | |
53 | nop | |
54 | nop | |
55 | blr |