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/*
* Copyright 2003, 04 PMC-Sierra Inc.
* Author: Manish Lachwani (lachwani@pmc-sierra.com
* Copyright 2004 Ralf Baechle (ralf@linux-mips.org)
*
* First-level interrupt router for the PMC-Sierra Titan board
*
* 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.
*
* Titan supports Hypertransport or PCI but not both. Hence, one interrupt
* line is shared between the PCI slot A and Hypertransport. This is the
* Processor INTB #0.
*/
#include <linux/config.h>
#include <asm/asm.h>
#include <asm/mipsregs.h>
#include <asm/addrspace.h>
#include <asm/regdef.h>
#include <asm/stackframe.h>
.align 5
NESTED(titan_handle_int, PT_SIZE, sp)
SAVE_ALL
CLI
.set at
.set noreorder
la ra, ret_from_irq
mfc0 t0, CP0_CAUSE
mfc0 t2, CP0_STATUS
and t0, t2
andi t2, t0, STATUSF_IP7 /* INTB5 hardware line */
bnez t2, ll_timer_irq /* Timer */
andi t1, t0, STATUSF_IP2 /* INTB0 hardware line */
bnez t1, ll_pcia_irq /* 64-bit PCI */
andi t2, t0, STATUSF_IP3 /* INTB1 hardware line */
bnez t2, ll_pcib_irq /* second 64-bit PCI slot */
andi t1, t0, STATUSF_IP4 /* INTB2 hardware line */
bnez t1, ll_duart_irq /* UART */
andi t2, t0, STATUSF_IP5 /* SMP inter-core interrupts */
bnez t2, ll_smp_irq
andi t1, t0, STATUSF_IP6
bnez t1, ll_ht_irq /* Hypertransport */
move a0, sp
j do_extended_irq
END(titan_handle_int)
.set reorder
.align 5
ll_pcia_irq:
li a0, 2
move a1, sp
#ifdef CONFIG_HYPERTRANSPORT
j ll_ht_smp_irq_handler
#else
j do_IRQ
#endif
ll_pcib_irq:
li a0, 3
move a1, sp
j do_IRQ
ll_duart_irq:
li a0, 4
move a1, sp
j do_IRQ
ll_smp_irq:
li a0, 5
move a1, sp
#ifdef CONFIG_SMP
j titan_mailbox_irq
#else
j do_IRQ
#endif
ll_ht_irq:
li a0, 6
move a1, sp
j ll_ht_smp_irq_handler
ll_timer_irq:
li a0, 7
move a1, sp
j do_IRQ
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