669b792c77
Turns on trace earlier, so crashes at kernel start should print out a trace, making things easier to debug. Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
255 lines
5 KiB
ArmAsm
255 lines
5 KiB
ArmAsm
/*
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* File: arch/blackfin/mach-common/interrupt.S
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* Based on:
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* Author: D. Jeff Dionne <jeff@ryeham.ee.ryerson.ca>
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* Kenneth Albanowski <kjahds@kjahds.com>
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*
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* Created: ?
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* Description: Interrupt Entries
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*
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* Modified:
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* Copyright 2004-2006 Analog Devices Inc.
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*
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* Bugs: Enter bugs at http://blackfin.uclinux.org/
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see the file COPYING, or write
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* to the Free Software Foundation, Inc.,
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* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <asm/blackfin.h>
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#include <asm/mach/irq.h>
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#include <linux/autoconf.h>
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#include <linux/linkage.h>
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#include <asm/entry.h>
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#include <asm/asm-offsets.h>
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#include <asm/trace.h>
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#include <asm/mach-common/context.S>
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#ifdef CONFIG_I_ENTRY_L1
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.section .l1.text
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#else
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.text
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#endif
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.align 4 /* just in case */
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/*
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* initial interrupt handlers
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*/
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#ifndef CONFIG_KGDB
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/* interrupt routine for emulation - 0 */
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/* Currently used only if GDB stub is not in - invalid */
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/* gdb-stub set the evt itself */
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/* save registers for post-mortem only */
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ENTRY(_evt_emulation)
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SAVE_ALL_SYS
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#ifdef CONFIG_FRAME_POINTER
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fp = 0;
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#endif
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r0 = IRQ_EMU;
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r1 = sp;
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SP += -12;
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call _irq_panic;
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SP += 12;
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/* - GDB stub fills this in by itself (if defined) */
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rte;
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ENDPROC(_evt_emulation)
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#endif
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/* Common interrupt entry code. First we do CLI, then push
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* RETI, to keep interrupts disabled, but to allow this state to be changed
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* by local_bh_enable.
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* R0 contains the interrupt number, while R1 may contain the value of IPEND,
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* or garbage if IPEND won't be needed by the ISR. */
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__common_int_entry:
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[--sp] = fp;
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[--sp] = usp;
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[--sp] = i0;
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[--sp] = i1;
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[--sp] = i2;
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[--sp] = i3;
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[--sp] = m0;
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[--sp] = m1;
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[--sp] = m2;
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[--sp] = m3;
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[--sp] = l0;
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[--sp] = l1;
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[--sp] = l2;
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[--sp] = l3;
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[--sp] = b0;
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[--sp] = b1;
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[--sp] = b2;
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[--sp] = b3;
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[--sp] = a0.x;
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[--sp] = a0.w;
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[--sp] = a1.x;
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[--sp] = a1.w;
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[--sp] = LC0;
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[--sp] = LC1;
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[--sp] = LT0;
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[--sp] = LT1;
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[--sp] = LB0;
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[--sp] = LB1;
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[--sp] = ASTAT;
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[--sp] = r0; /* Skip reserved */
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[--sp] = RETS;
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r2 = RETI;
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[--sp] = r2;
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[--sp] = RETX;
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[--sp] = RETN;
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[--sp] = RETE;
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[--sp] = SEQSTAT;
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[--sp] = r1; /* IPEND - R1 may or may not be set up before jumping here. */
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/* Switch to other method of keeping interrupts disabled. */
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#ifdef CONFIG_DEBUG_HWERR
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r1 = 0x3f;
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sti r1;
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#else
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cli r1;
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#endif
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[--sp] = RETI; /* orig_pc */
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/* Clear all L registers. */
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r1 = 0 (x);
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l0 = r1;
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l1 = r1;
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l2 = r1;
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l3 = r1;
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#ifdef CONFIG_FRAME_POINTER
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fp = 0;
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#endif
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#if defined (ANOMALY_05000283) || defined (ANOMALY_05000315)
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cc = r7 == r7;
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p5.h = 0xffc0;
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p5.l = 0x0014;
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if cc jump 1f;
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r7.l = W[p5];
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1:
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#endif
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r1 = sp;
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SP += -12;
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call _do_irq;
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SP += 12;
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call _return_from_int;
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.Lcommon_restore_context:
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RESTORE_CONTEXT
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rti;
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/* interrupt routine for ivhw - 5 */
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ENTRY(_evt_ivhw)
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SAVE_CONTEXT
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#ifdef CONFIG_FRAME_POINTER
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fp = 0;
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#endif
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#ifdef ANOMALY_05000283
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cc = r7 == r7;
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p5.h = 0xffc0;
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p5.l = 0x0014;
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if cc jump 1f;
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r7.l = W[p5];
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1:
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#endif
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trace_buffer_stop(p0, r0);
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r0 = IRQ_HWERR;
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r1 = sp;
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#ifdef CONFIG_HARDWARE_PM
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r7 = SEQSTAT;
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r7 = r7 >>> 0xe;
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r6 = 0x1F;
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r7 = r7 & r6;
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r5 = 0x12;
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cc = r7 == r5;
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if cc jump .Lcall_do_ovf; /* deal with performance counter overflow */
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#endif
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SP += -12;
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call _irq_panic;
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SP += 12;
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rti;
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#ifdef CONFIG_HARDWARE_PM
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.Lcall_do_ovf:
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SP += -12;
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call _pm_overflow;
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SP += 12;
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jump .Lcommon_restore_context;
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#endif
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/* interrupt routine for evt2 - 2. This is NMI. */
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ENTRY(_evt_evt2)
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SAVE_CONTEXT
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#ifdef CONFIG_FRAME_POINTER
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fp = 0;
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#endif
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#ifdef ANOMALY_05000283
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cc = r7 == r7;
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p5.h = 0xffc0;
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p5.l = 0x0014;
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if cc jump 1f;
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r7.l = W[p5];
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1:
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#endif
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r0 = IRQ_NMI;
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r1 = sp;
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SP += -12;
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call _asm_do_IRQ;
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SP += 12;
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RESTORE_CONTEXT
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rtn;
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/* interrupt routine for core timer - 6 */
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ENTRY(_evt_timer)
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TIMER_INTERRUPT_ENTRY(EVT_IVTMR_P)
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/* interrupt routine for evt7 - 7 */
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ENTRY(_evt_evt7)
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INTERRUPT_ENTRY(EVT_IVG7_P)
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ENTRY(_evt_evt8)
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INTERRUPT_ENTRY(EVT_IVG8_P)
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ENTRY(_evt_evt9)
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INTERRUPT_ENTRY(EVT_IVG9_P)
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ENTRY(_evt_evt10)
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INTERRUPT_ENTRY(EVT_IVG10_P)
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ENTRY(_evt_evt11)
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INTERRUPT_ENTRY(EVT_IVG11_P)
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ENTRY(_evt_evt12)
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INTERRUPT_ENTRY(EVT_IVG12_P)
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ENTRY(_evt_evt13)
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INTERRUPT_ENTRY(EVT_IVG13_P)
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/* interrupt routine for system_call - 15 */
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ENTRY(_evt_system_call)
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SAVE_CONTEXT_SYSCALL
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#ifdef CONFIG_FRAME_POINTER
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fp = 0;
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#endif
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call _system_call;
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jump .Lcommon_restore_context;
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ENDPROC(_evt_system_call)
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