/* * Copyright 2002 Momentum Computer Inc. * Author: Matthew Dharm * * Copyright 2001 MontaVista Software Inc. * Author: jsun@mvista.com or jsun@junsun.net * * First-level interrupt dispatcher for Ocelot-CS 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. */ #include #include #include #include #include #include "ocelot_c_fpga.h" /* * First level interrupt dispatcher for Ocelot-CS board */ .align 5 NESTED(ocelot_handle_int, PT_SIZE, sp) SAVE_ALL CLI .set at mfc0 t0, CP0_CAUSE mfc0 t2, CP0_STATUS and t0, t2 andi t1, t0, STATUSF_IP0 /* sw0 software interrupt */ bnez t1, ll_sw0_irq andi t1, t0, STATUSF_IP1 /* sw1 software interrupt */ bnez t1, ll_sw1_irq andi t1, t0, STATUSF_IP2 /* int0 hardware line */ bnez t1, ll_scsi_irq andi t1, t0, STATUSF_IP3 /* int1 hardware line */ bnez t1, ll_uart_decode_irq andi t1, t0, STATUSF_IP4 /* int2 hardware line */ bnez t1, ll_pmc_irq andi t1, t0, STATUSF_IP5 /* int3 hardware line */ bnez t1, ll_cpci_decode_irq andi t1, t0, STATUSF_IP6 /* int4 hardware line */ bnez t1, ll_mv64340_decode_irq andi t1, t0, STATUSF_IP7 /* cpu timer */ bnez t1, ll_cputimer_irq .set reorder /* wrong alarm or masked ... */ jal spurious_interrupt nop j ret_from_irq END(ocelot_handle_int) .align 5 ll_sw0_irq: li a0, 0 move a1, sp jal do_IRQ j ret_from_irq ll_sw1_irq: li a0, 1 move a1, sp jal do_IRQ j ret_from_irq ll_scsi_irq: li a0, 2 move a1, sp jal do_IRQ j ret_from_irq ll_uart_decode_irq: move a0, sp jal ll_uart_irq j ret_from_irq ll_pmc_irq: li a0, 4 move a1, sp jal do_IRQ j ret_from_irq ll_cpci_decode_irq: move a0, sp jal ll_cpci_irq j ret_from_irq ll_mv64340_decode_irq: move a0, sp jal ll_mv64340_irq j ret_from_irq ll_cputimer_irq: li a0, 7 move a1, sp jal do_IRQ j ret_from_irq