projects / mirror_ubuntu-zesty-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| c111d0bd SR |
1 | /* |
| 2 | * This file contains miscellaneous low-level functions. | |
| 3 | * Copyright (C) 1995-2005 IBM Corp | |
| 4 | * | |
| 5 | * Largely rewritten by Cort Dougan (cort@cs.nmt.edu) | |
| 6 | * and Paul Mackerras. | |
| 7 | * Adapted for iSeries by Mike Corrigan (mikejc@us.ibm.com) | |
| 8 | * PPC64 updates by Dave Engebretsen (engebret@us.ibm.com) | |
| 9 | * | |
| 10 | * This program is free software; you can redistribute it and/or | |
| 11 | * modify it under the terms of the GNU General Public License | |
| 12 | * as published by the Free Software Foundation; either version | |
| 13 | * 2 of the License, or (at your option) any later version. | |
| 14 | */ | |
| 15 | ||
| 16 | #include <asm/processor.h> | |
| 17 | #include <asm/asm-offsets.h> | |
| 3ddfbcf1 | 18 | #include <asm/ppc_asm.h> |
| c111d0bd SR |
19 | |
| 20 | .text | |
| 21 | ||
| 22 | /* unsigned long local_save_flags(void) */ | |
| 23 | _GLOBAL(local_get_flags) | |
| 24 | lbz r3,PACAPROCENABLED(r13) | |
| 25 | blr | |
| 26 | ||
| 27 | /* unsigned long local_irq_disable(void) */ | |
| 28 | _GLOBAL(local_irq_disable) | |
| 29 | lbz r3,PACAPROCENABLED(r13) | |
| 30 | li r4,0 | |
| 31 | stb r4,PACAPROCENABLED(r13) | |
| 32 | blr /* Done */ | |
| 33 | ||
| 34 | /* void local_irq_restore(unsigned long flags) */ | |
| 35 | _GLOBAL(local_irq_restore) | |
| 36 | lbz r5,PACAPROCENABLED(r13) | |
| 37 | /* Check if things are setup the way we want _already_. */ | |
| 38 | cmpw 0,r3,r5 | |
| 39 | beqlr | |
| 40 | /* are we enabling interrupts? */ | |
| 41 | cmpdi 0,r3,0 | |
| 42 | stb r3,PACAPROCENABLED(r13) | |
| 43 | beqlr | |
| 44 | /* Check pending interrupts */ | |
| 45 | /* A decrementer, IPI or PMC interrupt may have occurred | |
| 46 | * while we were in the hypervisor (which enables) */ | |
| 3356bb9f DG |
47 | ld r4,PACALPPACAPTR(r13) |
| 48 | ld r4,LPPACAANYINT(r4) | |
| c111d0bd SR |
49 | cmpdi r4,0 |
| 50 | beqlr | |
| 51 | ||
| 52 | /* | |
| 53 | * Handle pending interrupts in interrupt context | |
| 54 | */ | |
| 55 | li r0,0x5555 | |
| 56 | sc | |
| 57 | blr |