| /* |
| * 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 |
