projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1394f032 BW |
1 | /* |
| 2 | * File: arch/blackfin/kernel/entry.S | |
| 3 | * Based on: | |
| 4 | * Author: | |
| 5 | * | |
| 6 | * Created: | |
| 7 | * Description: | |
| 8 | * | |
| 9 | * Modified: | |
| 10 | * Copyright 2004-2006 Analog Devices Inc. | |
| 11 | * | |
| 12 | * Bugs: Enter bugs at http://blackfin.uclinux.org/ | |
| 13 | * | |
| 14 | * This program is free software; you can redistribute it and/or modify | |
| 15 | * it under the terms of the GNU General Public License as published by | |
| 16 | * the Free Software Foundation; either version 2 of the License, or | |
| 17 | * (at your option) any later version. | |
| 18 | * | |
| 19 | * This program is distributed in the hope that it will be useful, | |
| 20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 22 | * GNU General Public License for more details. | |
| 23 | * | |
| 24 | * You should have received a copy of the GNU General Public License | |
| 25 | * along with this program; if not, see the file COPYING, or write | |
| 26 | * to the Free Software Foundation, Inc., | |
| 27 | * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
| 28 | */ | |
| 29 | ||
| 30 | #include <linux/linkage.h> | |
| 31 | #include <asm/thread_info.h> | |
| 32 | #include <asm/errno.h> | |
| 8f65873e | 33 | #include <asm/blackfin.h> |
| 1394f032 BW |
34 | #include <asm/asm-offsets.h> |
| 35 | ||
| 639f6571 | 36 | #include <asm/context.S> |
| 1394f032 BW |
37 | |
| 38 | #ifdef CONFIG_EXCPT_IRQ_SYSC_L1 | |
| 39 | .section .l1.text | |
| 40 | #else | |
| 41 | .text | |
| 42 | #endif | |
| 43 | ||
| 44 | ENTRY(_ret_from_fork) | |
| 6a01f230 YL |
45 | #ifdef CONFIG_IPIPE |
| 46 | [--sp] = reti; /* IRQs on. */ | |
| 47 | SP += 4; | |
| 48 | #endif /* CONFIG_IPIPE */ | |
| 1394f032 BW |
49 | SP += -12; |
| 50 | call _schedule_tail; | |
| 51 | SP += 12; | |
| 52 | r0 = [sp + PT_IPEND]; | |
| 53 | cc = bittst(r0,1); | |
| 54 | if cc jump .Lin_kernel; | |
| 55 | RESTORE_CONTEXT | |
| 56 | rti; | |
| 57 | .Lin_kernel: | |
| 58 | bitclr(r0,1); | |
| 59 | [sp + PT_IPEND] = r0; | |
| 60 | /* do a 'fake' RTI by jumping to [RETI] | |
| 61 | * to avoid clearing supervisor mode in child | |
| aa770aa7 RG |
62 | */ |
| 63 | r0 = [sp + PT_PC]; | |
| 64 | [sp + PT_P0] = r0; | |
| 65 | ||
| 1394f032 | 66 | RESTORE_ALL_SYS |
| 1394f032 | 67 | jump (p0); |
| 51be24c3 | 68 | ENDPROC(_ret_from_fork) |
| 1394f032 BW |
69 | |
| 70 | ENTRY(_sys_fork) | |
| 71 | r0 = -EINVAL; | |
| 2cfebf2b MH |
72 | #if (ANOMALY_05000371) |
| 73 | nop; | |
| 74 | nop; | |
| 75 | nop; | |
| 76 | #endif | |
| 1394f032 | 77 | rts; |
| 51be24c3 | 78 | ENDPROC(_sys_fork) |
| 1394f032 BW |
79 | |
| 80 | ENTRY(_sys_vfork) | |
| 81 | r0 = sp; | |
| 82 | r0 += 24; | |
| 83 | [--sp] = rets; | |
| 84 | SP += -12; | |
| 85 | call _bfin_vfork; | |
| 86 | SP += 12; | |
| 87 | rets = [sp++]; | |
| 88 | rts; | |
| 51be24c3 | 89 | ENDPROC(_sys_vfork) |
| 1394f032 BW |
90 | |
| 91 | ENTRY(_sys_clone) | |
| 92 | r0 = sp; | |
| 93 | r0 += 24; | |
| 94 | [--sp] = rets; | |
| 95 | SP += -12; | |
| 96 | call _bfin_clone; | |
| 97 | SP += 12; | |
| 98 | rets = [sp++]; | |
| 99 | rts; | |
| 51be24c3 | 100 | ENDPROC(_sys_clone) |
| 1394f032 BW |
101 | |
| 102 | ENTRY(_sys_rt_sigreturn) | |
| 103 | r0 = sp; | |
| 104 | r0 += 24; | |
| 105 | [--sp] = rets; | |
| 106 | SP += -12; | |
| 107 | call _do_rt_sigreturn; | |
| 108 | SP += 12; | |
| 109 | rets = [sp++]; | |
| 110 | rts; | |
| 51be24c3 | 111 | ENDPROC(_sys_rt_sigreturn) |