2007-03-20 10:16:24 +00:00
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/*
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* U-boot - interrupt.S Processing of interrupts and exception handling
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*
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2007-04-05 10:31:18 +00:00
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* Copyright (c) 2005-2007 Analog Devices Inc.
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2007-03-20 10:16:24 +00:00
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*
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* (C) Copyright 2000-2004
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* This file is based on interrupt.S
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*
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* Copyright (C) 2003 Metrowerks, Inc. <mwaddel@metrowerks.com>
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* Copyright (C) 2002 Arcturus Networks Ltd. Ted Ma <mated@sympatico.ca>
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* Copyright (C) 1998 D. Jeff Dionne <jeff@ryeham.ee.ryerson.ca>,
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* Kenneth Albanowski <kjahds@kjahds.com>,
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* The Silver Hammer Group, Ltd.
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*
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* (c) 1995, Dionne & Associates
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* (c) 1995, DKG Display Tech.
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*
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* This file is also based on exception.asm
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* (C) Copyright 2001-2005 - Analog Devices, Inc. All rights reserved.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (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, write to the Free Software
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2007-04-05 10:31:18 +00:00
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
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* MA 02110-1301 USA
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2007-03-20 10:16:24 +00:00
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*/
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#define ASSEMBLY
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#include <config.h>
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#include <asm/blackfin.h>
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#include <asm/hw_irq.h>
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#include <asm/entry.h>
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#include <asm/blackfin_defs.h>
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.global _blackfin_irq_panic;
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.text
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.align 2
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#ifndef CONFIG_KGDB
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.global _evt_emulation
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_evt_emulation:
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SAVE_CONTEXT
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r0 = IRQ_EMU;
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r1 = seqstat;
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sp += -12;
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call _blackfin_irq_panic;
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sp += 12;
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rte;
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#endif
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.global _evt_nmi
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_evt_nmi:
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SAVE_CONTEXT
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r0 = IRQ_NMI;
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r1 = RETN;
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sp += -12;
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call _blackfin_irq_panic;
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sp += 12;
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_evt_nmi_exit:
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rtn;
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.global _trap
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_trap:
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SAVE_ALL_SYS
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r0 = sp; /* stack frame pt_regs pointer argument ==> r0 */
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sp += -12;
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call _trap_c
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sp += 12;
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RESTORE_ALL_SYS
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rtx;
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.global _evt_rst
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_evt_rst:
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SAVE_CONTEXT
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r0 = IRQ_RST;
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r1 = RETN;
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sp += -12;
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call _do_reset;
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sp += 12;
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_evt_rst_exit:
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rtn;
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irq_panic:
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r0 = IRQ_EVX;
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r1 = sp;
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sp += -12;
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call _blackfin_irq_panic;
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sp += 12;
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.global _evt_ivhw
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_evt_ivhw:
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SAVE_CONTEXT
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RAISE 14;
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_evt_ivhw_exit:
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rti;
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.global _evt_timer
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_evt_timer:
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SAVE_CONTEXT
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r0 = IRQ_CORETMR;
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sp += -12;
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/* Polling method used now. */
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/* call timer_int; */
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sp += 12;
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RESTORE_CONTEXT
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rti;
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nop;
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.global _evt_evt7
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_evt_evt7:
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SAVE_CONTEXT
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r0 = 7;
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sp += -12;
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call _process_int;
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sp += 12;
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evt_evt7_exit:
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RESTORE_CONTEXT
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rti;
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.global _evt_evt8
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_evt_evt8:
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SAVE_CONTEXT
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r0 = 8;
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sp += -12;
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call _process_int;
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sp += 12;
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evt_evt8_exit:
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RESTORE_CONTEXT
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rti;
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.global _evt_evt9
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_evt_evt9:
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SAVE_CONTEXT
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r0 = 9;
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sp += -12;
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call _process_int;
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sp += 12;
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evt_evt9_exit:
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RESTORE_CONTEXT
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rti;
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.global _evt_evt10
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_evt_evt10:
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SAVE_CONTEXT
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r0 = 10;
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sp += -12;
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call _process_int;
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sp += 12;
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evt_evt10_exit:
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RESTORE_CONTEXT
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rti;
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.global _evt_evt11
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_evt_evt11:
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SAVE_CONTEXT
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r0 = 11;
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sp += -12;
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call _process_int;
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sp += 12;
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evt_evt11_exit:
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RESTORE_CONTEXT
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rti;
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.global _evt_evt12
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_evt_evt12:
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SAVE_CONTEXT
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r0 = 12;
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sp += -12;
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call _process_int;
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sp += 12;
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evt_evt12_exit:
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RESTORE_CONTEXT
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rti;
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.global _evt_evt13
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_evt_evt13:
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SAVE_CONTEXT
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r0 = 13;
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sp += -12;
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call _process_int;
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sp += 12;
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evt_evt13_exit:
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RESTORE_CONTEXT
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rti;
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.global _evt_system_call
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_evt_system_call:
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[--sp] = r0;
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[--SP] = RETI;
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r0 = [sp++];
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r0 += 2;
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[--sp] = r0;
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RETI = [SP++];
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r0 = [SP++];
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SAVE_CONTEXT
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sp += -12;
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call _exception_handle;
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sp += 12;
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RESTORE_CONTEXT
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RTI;
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evt_system_call_exit:
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rti;
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.global _evt_soft_int1
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_evt_soft_int1:
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[--sp] = r0;
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[--SP] = RETI;
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r0 = [sp++];
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r0 += 2;
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[--sp] = r0;
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RETI = [SP++];
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r0 = [SP++];
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SAVE_CONTEXT
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sp += -12;
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call _exception_handle;
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sp += 12;
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RESTORE_CONTEXT
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RTI;
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evt_soft_int1_exit:
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rti;
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