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Diffstat (limited to 'include/asm-mips/irq.h')
| -rw-r--r-- | include/asm-mips/irq.h | 163 |
1 files changed, 0 insertions, 163 deletions
diff --git a/include/asm-mips/irq.h b/include/asm-mips/irq.h deleted file mode 100644 index a58f0ee..0000000 --- a/include/asm-mips/irq.h +++ /dev/null @@ -1,163 +0,0 @@ -/* - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - * Copyright (C) 1994 by Waldorf GMBH, written by Ralf Baechle - * Copyright (C) 1995, 96, 97, 98, 99, 2000, 01, 02, 03 by Ralf Baechle - */ -#ifndef _ASM_IRQ_H -#define _ASM_IRQ_H - -#include <linux/linkage.h> - -#include <asm/mipsmtregs.h> - -#include <irq.h> - -#ifdef CONFIG_I8259 -static inline int irq_canonicalize(int irq) -{ - return ((irq == I8259A_IRQ_BASE + 2) ? I8259A_IRQ_BASE + 9 : irq); -} -#else -#define irq_canonicalize(irq) (irq) /* Sane hardware, sane code ... */ -#endif - -#ifdef CONFIG_MIPS_MT_SMTC - -struct irqaction; - -extern unsigned long irq_hwmask[]; -extern int setup_irq_smtc(unsigned int irq, struct irqaction * new, - unsigned long hwmask); - -static inline void smtc_im_ack_irq(unsigned int irq) -{ - if (irq_hwmask[irq] & ST0_IM) - set_c0_status(irq_hwmask[irq] & ST0_IM); -} - -#else - -static inline void smtc_im_ack_irq(unsigned int irq) -{ -} - -#endif /* CONFIG_MIPS_MT_SMTC */ - -#ifdef CONFIG_MIPS_MT_SMTC_IRQAFF -#include <linux/cpumask.h> - -extern void plat_set_irq_affinity(unsigned int irq, cpumask_t affinity); -extern void smtc_forward_irq(unsigned int irq); - -/* - * IRQ affinity hook invoked at the beginning of interrupt dispatch - * if option is enabled. - * - * Up through Linux 2.6.22 (at least) cpumask operations are very - * inefficient on MIPS. Initial prototypes of SMTC IRQ affinity - * used a "fast path" per-IRQ-descriptor cache of affinity information - * to reduce latency. As there is a project afoot to optimize the - * cpumask implementations, this version is optimistically assuming - * that cpumask.h macro overhead is reasonable during interrupt dispatch. - */ -#define IRQ_AFFINITY_HOOK(irq) \ -do { \ - if (!cpu_isset(smp_processor_id(), irq_desc[irq].affinity)) { \ - smtc_forward_irq(irq); \ - irq_exit(); \ - return; \ - } \ -} while (0) - -#else /* Not doing SMTC affinity */ - -#define IRQ_AFFINITY_HOOK(irq) do { } while (0) - -#endif /* CONFIG_MIPS_MT_SMTC_IRQAFF */ - -#ifdef CONFIG_MIPS_MT_SMTC_IM_BACKSTOP - -/* - * Clear interrupt mask handling "backstop" if irq_hwmask - * entry so indicates. This implies that the ack() or end() - * functions will take over re-enabling the low-level mask. - * Otherwise it will be done on return from exception. - */ -#define __DO_IRQ_SMTC_HOOK(irq) \ -do { \ - IRQ_AFFINITY_HOOK(irq); \ - if (irq_hwmask[irq] & 0x0000ff00) \ - write_c0_tccontext(read_c0_tccontext() & \ - ~(irq_hwmask[irq] & 0x0000ff00)); \ -} while (0) - -#define __NO_AFFINITY_IRQ_SMTC_HOOK(irq) \ -do { \ - if (irq_hwmask[irq] & 0x0000ff00) \ - write_c0_tccontext(read_c0_tccontext() & \ - ~(irq_hwmask[irq] & 0x0000ff00)); \ -} while (0) - -#else - -#define __DO_IRQ_SMTC_HOOK(irq) \ -do { \ - IRQ_AFFINITY_HOOK(irq); \ -} while (0) -#define __NO_AFFINITY_IRQ_SMTC_HOOK(irq) do { } while (0) - -#endif - -/* - * do_IRQ handles all normal device IRQ's (the special - * SMP cross-CPU interrupts have their own specific - * handlers). - * - * Ideally there should be away to get this into kernel/irq/handle.c to - * avoid the overhead of a call for just a tiny function ... - */ -#define do_IRQ(irq) \ -do { \ - irq_enter(); \ - __DO_IRQ_SMTC_HOOK(irq); \ - generic_handle_irq(irq); \ - irq_exit(); \ -} while (0) - -#ifdef CONFIG_MIPS_MT_SMTC_IRQAFF -/* - * To avoid inefficient and in some cases pathological re-checking of - * IRQ affinity, we have this variant that skips the affinity check. - */ - - -#define do_IRQ_no_affinity(irq) \ -do { \ - irq_enter(); \ - __NO_AFFINITY_IRQ_SMTC_HOOK(irq); \ - generic_handle_irq(irq); \ - irq_exit(); \ -} while (0) - -#endif /* CONFIG_MIPS_MT_SMTC_IRQAFF */ - -extern void arch_init_irq(void); -extern void spurious_interrupt(void); - -extern int allocate_irqno(void); -extern void alloc_legacy_irqno(void); -extern void free_irqno(unsigned int irq); - -/* - * Before R2 the timer and performance counter interrupts were both fixed to - * IE7. Since R2 their number has to be read from the c0_intctl register. - */ -#define CP0_LEGACY_COMPARE_IRQ 7 - -extern int cp0_compare_irq; -extern int cp0_perfcount_irq; - -#endif /* _ASM_IRQ_H */ |