diff options
Diffstat (limited to 'arch/ppc/syslib/ppc403_pic.c')
-rw-r--r-- | arch/ppc/syslib/ppc403_pic.c | 125 |
1 files changed, 0 insertions, 125 deletions
diff --git a/arch/ppc/syslib/ppc403_pic.c b/arch/ppc/syslib/ppc403_pic.c deleted file mode 100644 index c3b7b8b..0000000 --- a/arch/ppc/syslib/ppc403_pic.c +++ /dev/null @@ -1,125 +0,0 @@ -/* - * - * Copyright (c) 1999 Grant Erickson <grant@lcse.umn.edu> - * - * Module name: ppc403_pic.c - * - * Description: - * Interrupt controller driver for PowerPC 403-based processors. - */ - -/* - * The PowerPC 403 cores' Asynchronous Interrupt Controller (AIC) has - * 32 possible interrupts, a majority of which are not implemented on - * all cores. There are six configurable, external interrupt pins and - * there are eight internal interrupts for the on-chip serial port - * (SPU), DMA controller, and JTAG controller. - * - */ - -#include <linux/init.h> -#include <linux/sched.h> -#include <linux/signal.h> -#include <linux/stddef.h> - -#include <asm/processor.h> -#include <asm/system.h> -#include <asm/irq.h> -#include <asm/ppc4xx_pic.h> -#include <asm/machdep.h> - -/* Function Prototypes */ - -static void ppc403_aic_enable(unsigned int irq); -static void ppc403_aic_disable(unsigned int irq); -static void ppc403_aic_disable_and_ack(unsigned int irq); - -static struct hw_interrupt_type ppc403_aic = { - .typename = "403GC AIC", - .enable = ppc403_aic_enable, - .disable = ppc403_aic_disable, - .ack = ppc403_aic_disable_and_ack, -}; - -int -ppc403_pic_get_irq(void) -{ - int irq; - unsigned long bits; - - /* - * Only report the status of those interrupts that are actually - * enabled. - */ - - bits = mfdcr(DCRN_EXISR) & mfdcr(DCRN_EXIER); - - /* - * Walk through the interrupts from highest priority to lowest, and - * report the first pending interrupt found. - * We want PPC, not C bit numbering, so just subtract the ffs() - * result from 32. - */ - irq = 32 - ffs(bits); - - if (irq == NR_AIC_IRQS) - irq = -1; - - return (irq); -} - -static void -ppc403_aic_enable(unsigned int irq) -{ - int bit, word; - - bit = irq & 0x1f; - word = irq >> 5; - - ppc_cached_irq_mask[word] |= (1 << (31 - bit)); - mtdcr(DCRN_EXIER, ppc_cached_irq_mask[word]); -} - -static void -ppc403_aic_disable(unsigned int irq) -{ - int bit, word; - - bit = irq & 0x1f; - word = irq >> 5; - - ppc_cached_irq_mask[word] &= ~(1 << (31 - bit)); - mtdcr(DCRN_EXIER, ppc_cached_irq_mask[word]); -} - -static void -ppc403_aic_disable_and_ack(unsigned int irq) -{ - int bit, word; - - bit = irq & 0x1f; - word = irq >> 5; - - ppc_cached_irq_mask[word] &= ~(1 << (31 - bit)); - mtdcr(DCRN_EXIER, ppc_cached_irq_mask[word]); - mtdcr(DCRN_EXISR, (1 << (31 - bit))); -} - -void __init -ppc4xx_pic_init(void) -{ - int i; - - /* - * Disable all external interrupts until they are - * explicitly requested. - */ - ppc_cached_irq_mask[0] = 0; - - mtdcr(DCRN_EXIER, ppc_cached_irq_mask[0]); - - ppc_md.get_irq = ppc403_pic_get_irq; - - for (i = 0; i < NR_IRQS; i++) - irq_desc[i].chip = &ppc403_aic; -} |