diff options
Diffstat (limited to 'arch/mips/mips-boards/sead/sead_int.c')
| -rw-r--r-- | arch/mips/mips-boards/sead/sead_int.c | 117 |
1 files changed, 0 insertions, 117 deletions
diff --git a/arch/mips/mips-boards/sead/sead_int.c b/arch/mips/mips-boards/sead/sead_int.c deleted file mode 100644 index ec6dd194c14..00000000000 --- a/arch/mips/mips-boards/sead/sead_int.c +++ /dev/null @@ -1,117 +0,0 @@ -/* - * Carsten Langgaard, carstenl@mips.com - * Copyright (C) 2002 MIPS Technologies, Inc. All rights reserved. - * Copyright (C) 2003 Ralf Baechle (ralf@linux-mips.org) - * Copyright (C) 2004 Maciej W. Rozycki - * - * This program is free software; you can distribute it and/or modify it - * under the terms of the GNU General Public License (Version 2) as - * published by the Free Software Foundation. - * - * This program is distributed in the hope 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. - * - * Routines for generic manipulation of the interrupts found on the MIPS - * Sead board. - */ -#include <linux/init.h> -#include <linux/interrupt.h> - -#include <asm/irq_cpu.h> -#include <asm/mipsregs.h> -#include <asm/system.h> - -#include <asm/mips-boards/seadint.h> - -static inline int clz(unsigned long x) -{ - __asm__( - " .set push \n" - " .set mips32 \n" - " clz %0, %1 \n" - " .set pop \n" - : "=r" (x) - : "r" (x)); - - return x; -} - -/* - * Version of ffs that only looks at bits 12..15. - */ -static inline unsigned int irq_ffs(unsigned int pending) -{ -#if defined(CONFIG_CPU_MIPS32) || defined(CONFIG_CPU_MIPS64) - return -clz(pending) + 31 - CAUSEB_IP; -#else - unsigned int a0 = 7; - unsigned int t0; - - t0 = s0 & 0xf000; - t0 = t0 < 1; - t0 = t0 << 2; - a0 = a0 - t0; - s0 = s0 << t0; - - t0 = s0 & 0xc000; - t0 = t0 < 1; - t0 = t0 << 1; - a0 = a0 - t0; - s0 = s0 << t0; - - t0 = s0 & 0x8000; - t0 = t0 < 1; - //t0 = t0 << 2; - a0 = a0 - t0; - //s0 = s0 << t0; - - return a0; -#endif -} - -/* - * IRQs on the SEAD board look basically are combined together on hardware - * interrupt 0 (MIPS IRQ 2)) like: - * - * MIPS IRQ Source - * -------- ------ - * 0 Software (ignored) - * 1 Software (ignored) - * 2 UART0 (hw0) - * 3 UART1 (hw1) - * 4 Hardware (ignored) - * 5 Hardware (ignored) - * 6 Hardware (ignored) - * 7 R4k timer (what we use) - * - * We handle the IRQ according to _our_ priority which is: - * - * Highest ---- R4k Timer - * Lowest ---- Combined hardware interrupt - * - * then we just return, if multiple IRQs are pending then we will just take - * another exception, big deal. - */ -asmlinkage void plat_irq_dispatch(void) -{ - unsigned int pending = read_c0_cause() & read_c0_status() & ST0_IM; - int irq; - - irq = irq_ffs(pending); - - if (irq >= 0) - do_IRQ(MIPS_CPU_IRQ_BASE + irq); - else - spurious_interrupt(); -} - -void __init arch_init_irq(void) -{ - mips_cpu_irq_init(); -} |