Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 1 | /* |
| 2 | * File: arch/blackfin/mach-common/interrupt.S |
| 3 | * Based on: |
| 4 | * Author: D. Jeff Dionne <jeff@ryeham.ee.ryerson.ca> |
| 5 | * Kenneth Albanowski <kjahds@kjahds.com> |
| 6 | * |
| 7 | * Created: ? |
| 8 | * Description: Interrupt Entries |
| 9 | * |
| 10 | * Modified: |
| 11 | * Copyright 2004-2006 Analog Devices Inc. |
| 12 | * |
| 13 | * Bugs: Enter bugs at http://blackfin.uclinux.org/ |
| 14 | * |
| 15 | * This program is free software; you can redistribute it and/or modify |
| 16 | * it under the terms of the GNU General Public License as published by |
| 17 | * the Free Software Foundation; either version 2 of the License, or |
| 18 | * (at your option) any later version. |
| 19 | * |
| 20 | * This program is distributed in the hope that it will be useful, |
| 21 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 22 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 23 | * GNU General Public License for more details. |
| 24 | * |
| 25 | * You should have received a copy of the GNU General Public License |
| 26 | * along with this program; if not, see the file COPYING, or write |
| 27 | * to the Free Software Foundation, Inc., |
| 28 | * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 29 | */ |
| 30 | |
| 31 | #include <asm/blackfin.h> |
| 32 | #include <asm/mach/irq.h> |
| 33 | #include <linux/autoconf.h> |
| 34 | #include <linux/linkage.h> |
| 35 | #include <asm/entry.h> |
| 36 | #include <asm/asm-offsets.h> |
Robin Getz | 669b792 | 2007-06-21 16:34:08 +0800 | [diff] [blame] | 37 | #include <asm/trace.h> |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 38 | |
| 39 | #include <asm/mach-common/context.S> |
| 40 | |
| 41 | #ifdef CONFIG_I_ENTRY_L1 |
| 42 | .section .l1.text |
| 43 | #else |
| 44 | .text |
| 45 | #endif |
| 46 | |
| 47 | .align 4 /* just in case */ |
| 48 | |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 49 | /* Common interrupt entry code. First we do CLI, then push |
| 50 | * RETI, to keep interrupts disabled, but to allow this state to be changed |
| 51 | * by local_bh_enable. |
| 52 | * R0 contains the interrupt number, while R1 may contain the value of IPEND, |
| 53 | * or garbage if IPEND won't be needed by the ISR. */ |
| 54 | __common_int_entry: |
| 55 | [--sp] = fp; |
| 56 | [--sp] = usp; |
| 57 | |
| 58 | [--sp] = i0; |
| 59 | [--sp] = i1; |
| 60 | [--sp] = i2; |
| 61 | [--sp] = i3; |
| 62 | |
| 63 | [--sp] = m0; |
| 64 | [--sp] = m1; |
| 65 | [--sp] = m2; |
| 66 | [--sp] = m3; |
| 67 | |
| 68 | [--sp] = l0; |
| 69 | [--sp] = l1; |
| 70 | [--sp] = l2; |
| 71 | [--sp] = l3; |
| 72 | |
| 73 | [--sp] = b0; |
| 74 | [--sp] = b1; |
| 75 | [--sp] = b2; |
| 76 | [--sp] = b3; |
| 77 | [--sp] = a0.x; |
| 78 | [--sp] = a0.w; |
| 79 | [--sp] = a1.x; |
| 80 | [--sp] = a1.w; |
| 81 | |
| 82 | [--sp] = LC0; |
| 83 | [--sp] = LC1; |
| 84 | [--sp] = LT0; |
| 85 | [--sp] = LT1; |
| 86 | [--sp] = LB0; |
| 87 | [--sp] = LB1; |
| 88 | |
| 89 | [--sp] = ASTAT; |
| 90 | |
| 91 | [--sp] = r0; /* Skip reserved */ |
| 92 | [--sp] = RETS; |
| 93 | r2 = RETI; |
| 94 | [--sp] = r2; |
| 95 | [--sp] = RETX; |
| 96 | [--sp] = RETN; |
| 97 | [--sp] = RETE; |
| 98 | [--sp] = SEQSTAT; |
| 99 | [--sp] = r1; /* IPEND - R1 may or may not be set up before jumping here. */ |
| 100 | |
| 101 | /* Switch to other method of keeping interrupts disabled. */ |
| 102 | #ifdef CONFIG_DEBUG_HWERR |
| 103 | r1 = 0x3f; |
| 104 | sti r1; |
| 105 | #else |
| 106 | cli r1; |
| 107 | #endif |
| 108 | [--sp] = RETI; /* orig_pc */ |
| 109 | /* Clear all L registers. */ |
| 110 | r1 = 0 (x); |
| 111 | l0 = r1; |
| 112 | l1 = r1; |
| 113 | l2 = r1; |
| 114 | l3 = r1; |
| 115 | #ifdef CONFIG_FRAME_POINTER |
| 116 | fp = 0; |
| 117 | #endif |
| 118 | |
Mike Frysinger | 1aafd90 | 2007-07-25 11:19:14 +0800 | [diff] [blame] | 119 | #if ANOMALY_05000283 || ANOMALY_05000315 |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 120 | cc = r7 == r7; |
| 121 | p5.h = 0xffc0; |
| 122 | p5.l = 0x0014; |
| 123 | if cc jump 1f; |
| 124 | r7.l = W[p5]; |
| 125 | 1: |
| 126 | #endif |
| 127 | r1 = sp; |
| 128 | SP += -12; |
| 129 | call _do_irq; |
| 130 | SP += 12; |
| 131 | call _return_from_int; |
| 132 | .Lcommon_restore_context: |
| 133 | RESTORE_CONTEXT |
| 134 | rti; |
| 135 | |
| 136 | /* interrupt routine for ivhw - 5 */ |
| 137 | ENTRY(_evt_ivhw) |
| 138 | SAVE_CONTEXT |
| 139 | #ifdef CONFIG_FRAME_POINTER |
| 140 | fp = 0; |
| 141 | #endif |
Mike Frysinger | 1aafd90 | 2007-07-25 11:19:14 +0800 | [diff] [blame] | 142 | #if ANOMALY_05000283 |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 143 | cc = r7 == r7; |
| 144 | p5.h = 0xffc0; |
| 145 | p5.l = 0x0014; |
| 146 | if cc jump 1f; |
| 147 | r7.l = W[p5]; |
| 148 | 1: |
| 149 | #endif |
Robin Getz | 669b792 | 2007-06-21 16:34:08 +0800 | [diff] [blame] | 150 | |
| 151 | trace_buffer_stop(p0, r0); |
| 152 | |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 153 | r0 = IRQ_HWERR; |
| 154 | r1 = sp; |
| 155 | |
| 156 | #ifdef CONFIG_HARDWARE_PM |
| 157 | r7 = SEQSTAT; |
| 158 | r7 = r7 >>> 0xe; |
| 159 | r6 = 0x1F; |
| 160 | r7 = r7 & r6; |
| 161 | r5 = 0x12; |
| 162 | cc = r7 == r5; |
| 163 | if cc jump .Lcall_do_ovf; /* deal with performance counter overflow */ |
| 164 | #endif |
| 165 | |
| 166 | SP += -12; |
| 167 | call _irq_panic; |
| 168 | SP += 12; |
| 169 | rti; |
| 170 | #ifdef CONFIG_HARDWARE_PM |
| 171 | .Lcall_do_ovf: |
| 172 | |
| 173 | SP += -12; |
| 174 | call _pm_overflow; |
| 175 | SP += 12; |
| 176 | |
| 177 | jump .Lcommon_restore_context; |
| 178 | #endif |
| 179 | |
Mike Frysinger | f0b5d12 | 2007-08-05 17:03:59 +0800 | [diff] [blame] | 180 | /* Interrupt routine for evt2 (NMI). |
| 181 | * We don't actually use this, so just return. |
| 182 | * For inner circle type details, please see: |
| 183 | * http://docs.blackfin.uclinux.org/doku.php?id=linux:nmi |
| 184 | */ |
| 185 | ENTRY(_evt_nmi) |
| 186 | .weak _evt_nmi |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 187 | rtn; |
Mike Frysinger | f0b5d12 | 2007-08-05 17:03:59 +0800 | [diff] [blame] | 188 | ENDPROC(_evt_nmi) |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 189 | |
| 190 | /* interrupt routine for core timer - 6 */ |
| 191 | ENTRY(_evt_timer) |
| 192 | TIMER_INTERRUPT_ENTRY(EVT_IVTMR_P) |
| 193 | |
| 194 | /* interrupt routine for evt7 - 7 */ |
| 195 | ENTRY(_evt_evt7) |
| 196 | INTERRUPT_ENTRY(EVT_IVG7_P) |
| 197 | ENTRY(_evt_evt8) |
| 198 | INTERRUPT_ENTRY(EVT_IVG8_P) |
| 199 | ENTRY(_evt_evt9) |
| 200 | INTERRUPT_ENTRY(EVT_IVG9_P) |
| 201 | ENTRY(_evt_evt10) |
| 202 | INTERRUPT_ENTRY(EVT_IVG10_P) |
| 203 | ENTRY(_evt_evt11) |
| 204 | INTERRUPT_ENTRY(EVT_IVG11_P) |
| 205 | ENTRY(_evt_evt12) |
| 206 | INTERRUPT_ENTRY(EVT_IVG12_P) |
| 207 | ENTRY(_evt_evt13) |
| 208 | INTERRUPT_ENTRY(EVT_IVG13_P) |
| 209 | |
| 210 | |
| 211 | /* interrupt routine for system_call - 15 */ |
| 212 | ENTRY(_evt_system_call) |
| 213 | SAVE_CONTEXT_SYSCALL |
| 214 | #ifdef CONFIG_FRAME_POINTER |
| 215 | fp = 0; |
| 216 | #endif |
| 217 | call _system_call; |
| 218 | jump .Lcommon_restore_context; |
Mike Frysinger | 51be24c | 2007-06-11 15:31:30 +0800 | [diff] [blame] | 219 | ENDPROC(_evt_system_call) |