94 lines
2.0 KiB
ArmAsm
94 lines
2.0 KiB
ArmAsm
/*
|
|
* 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
|