Merge with /home/wd/git/u-boot/custodian/u-boot-blackfin

1 files changed, 246 insertions, 0 deletions

diff --git a/cpu/bf537/interrupt.S b/cpu/bf537/interrupt.S
new file mode 100644
index 0000000..a8be34f
--- /dev/null
+++ b/cpu/bf537/interrupt.S
@@ -0,0 +1,246 @@
+/*
+ * U-boot - interrupt.S Processing of interrupts and exception handling
+ *
+ * Copyright (c) 2005 blackfin.uclinux.org
+ *
+ * (C) Copyright 2000-2004
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * This file is based on interrupt.S
+ *
+ * Copyright (C) 2003  Metrowerks, Inc. <mwaddel@metrowerks.com>
+ * Copyright (C) 2002  Arcturus Networks Ltd. Ted Ma <mated@sympatico.ca>
+ * Copyright (C) 1998  D. Jeff Dionne <jeff@ryeham.ee.ryerson.ca>,
+ *                     Kenneth Albanowski <kjahds@kjahds.com>,
+ *                     The Silver Hammer Group, Ltd.
+ *
+ * (c) 1995, Dionne & Associates
+ * (c) 1995, DKG Display Tech.
+ *
+ * This file is also based on exception.asm
+ * (C) Copyright 2001-2005 - Analog Devices, Inc.  All rights reserved.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#define ASSEMBLY
+#include <config.h>
+#include <asm/blackfin.h>
+#include <asm/hw_irq.h>
+#include <asm/entry.h>
+#include <asm/blackfin_defs.h>
+
+.global _blackfin_irq_panic;
+
+.text
+.align 2
+
+#ifndef CONFIG_KGDB
+.global _evt_emulation
+_evt_emulation:
+	SAVE_CONTEXT
+	r0 = IRQ_EMU;
+	r1 = seqstat;
+	sp += -12;
+	call _blackfin_irq_panic;
+	sp += 12;
+	rte;
+#endif
+
+.global _evt_nmi
+_evt_nmi:
+	SAVE_CONTEXT
+	r0 = IRQ_NMI;
+	r1 = RETN;
+	sp += -12;
+	call _blackfin_irq_panic;
+	sp += 12;
+
+_evt_nmi_exit:
+	rtn;
+
+.global _trap
+_trap:
+	SAVE_ALL_SYS
+	r0 = sp;	/* stack frame pt_regs pointer argument ==> r0 */
+	sp += -12;
+	call _trap_c
+	sp += 12;
+	RESTORE_ALL_SYS
+	rtx;
+
+.global _evt_rst
+_evt_rst:
+	SAVE_CONTEXT
+	r0 = IRQ_RST;
+	r1 = RETN;
+	sp += -12;
+	call _do_reset;
+	sp += 12;
+
+_evt_rst_exit:
+	rtn;
+
+irq_panic:
+	r0 = IRQ_EVX;
+	r1 =  sp;
+	sp += -12;
+	call _blackfin_irq_panic;
+	sp += 12;
+
+.global _evt_ivhw
+_evt_ivhw:
+	SAVE_CONTEXT
+	RAISE 14;
+
+_evt_ivhw_exit:
+	 rti;
+
+.global _evt_timer
+_evt_timer:
+	SAVE_CONTEXT
+	r0 = IRQ_CORETMR;
+	sp += -12;
+	/* Polling method used now. */
+	/* call timer_int; */
+	sp += 12;
+	RESTORE_CONTEXT
+	rti;
+	nop;
+
+.global _evt_evt7
+_evt_evt7:
+	SAVE_CONTEXT
+	r0 = 7;
+	sp += -12;
+	call _process_int;
+	sp += 12;
+
+evt_evt7_exit:
+	RESTORE_CONTEXT
+	rti;
+
+.global _evt_evt8
+_evt_evt8:
+	SAVE_CONTEXT
+	r0 = 8;
+	sp += -12;
+	call _process_int;
+	sp += 12;
+
+evt_evt8_exit:
+	RESTORE_CONTEXT
+	rti;
+
+.global _evt_evt9
+_evt_evt9:
+	SAVE_CONTEXT
+	r0 = 9;
+	sp += -12;
+	call _process_int;
+	sp += 12;
+
+evt_evt9_exit:
+	RESTORE_CONTEXT
+	rti;
+
+.global _evt_evt10
+_evt_evt10:
+	SAVE_CONTEXT
+	r0 = 10;
+	sp += -12;
+	call _process_int;
+	sp += 12;
+
+evt_evt10_exit:
+	RESTORE_CONTEXT
+	rti;
+
+.global _evt_evt11
+_evt_evt11:
+	SAVE_CONTEXT
+	r0 = 11;
+	sp += -12;
+	call _process_int;
+	sp += 12;
+
+evt_evt11_exit:
+	RESTORE_CONTEXT
+	rti;
+
+.global _evt_evt12
+_evt_evt12:
+	SAVE_CONTEXT
+	r0 = 12;
+	sp += -12;
+	call _process_int;
+	sp += 12;
+evt_evt12_exit:
+	 RESTORE_CONTEXT
+	 rti;
+
+.global _evt_evt13
+_evt_evt13:
+	SAVE_CONTEXT
+	r0 = 13;
+	sp += -12;
+	call _process_int;
+	sp += 12;
+
+evt_evt13_exit:
+	 RESTORE_CONTEXT
+	 rti;
+
+.global _evt_system_call
+_evt_system_call:
+	[--sp] = r0;
+	[--SP] = RETI;
+	r0 = [sp++];
+	r0 += 2;
+	[--sp] = r0;
+	RETI = [SP++];
+	r0 = [SP++];
+	SAVE_CONTEXT
+	sp += -12;
+	call _exception_handle;
+	sp += 12;
+	RESTORE_CONTEXT
+	RTI;
+
+evt_system_call_exit:
+	rti;
+
+.global _evt_soft_int1
+_evt_soft_int1:
+	[--sp] = r0;
+	[--SP] = RETI;
+	r0 = [sp++];
+	r0 += 2;
+	[--sp] = r0;
+	RETI = [SP++];
+	r0 = [SP++];
+	SAVE_CONTEXT
+	sp += -12;
+	call _exception_handle;
+	sp += 12;
+	RESTORE_CONTEXT
+	RTI;
+
+evt_soft_int1_exit:
+	rti;