irq.h
上传用户:lgb322
上传日期:2013-02-24
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文件大小:3k
- /*
- * linux/include/asm-arm/arch-rpc/irq.h
- *
- * Copyright (C) 1996 Russell King
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * Changelog:
- * 10-10-1996 RMK Brought up to date with arch-sa110eval
- * 22-08-1998 RMK Restructured IRQ routines
- */
- #include <asm/hardware/iomd.h>
- #include <asm/io.h>
- #define fixup_irq(x) (x)
- static void rpc_mask_irq_ack_a(unsigned int irq)
- {
- unsigned int val, mask;
- mask = 1 << irq;
- val = iomd_readb(IOMD_IRQMASKA);
- iomd_writeb(val & ~mask, IOMD_IRQMASKA);
- iomd_writeb(mask, IOMD_IRQCLRA);
- }
- static void rpc_mask_irq_a(unsigned int irq)
- {
- unsigned int val, mask;
- mask = 1 << irq;
- val = iomd_readb(IOMD_IRQMASKA);
- iomd_writeb(val & ~mask, IOMD_IRQMASKA);
- }
- static void rpc_unmask_irq_a(unsigned int irq)
- {
- unsigned int val, mask;
- mask = 1 << irq;
- val = iomd_readb(IOMD_IRQMASKA);
- iomd_writeb(val | mask, IOMD_IRQMASKA);
- }
- static void rpc_mask_irq_b(unsigned int irq)
- {
- unsigned int val, mask;
- mask = 1 << (irq & 7);
- val = iomd_readb(IOMD_IRQMASKB);
- iomd_writeb(val & ~mask, IOMD_IRQMASKB);
- }
- static void rpc_unmask_irq_b(unsigned int irq)
- {
- unsigned int val, mask;
- mask = 1 << (irq & 7);
- val = iomd_readb(IOMD_IRQMASKB);
- iomd_writeb(val | mask, IOMD_IRQMASKB);
- }
- static void rpc_mask_irq_dma(unsigned int irq)
- {
- unsigned int val, mask;
- mask = 1 << (irq & 7);
- val = iomd_readb(IOMD_DMAMASK);
- iomd_writeb(val & ~mask, IOMD_DMAMASK);
- }
- static void rpc_unmask_irq_dma(unsigned int irq)
- {
- unsigned int val, mask;
- mask = 1 << (irq & 7);
- val = iomd_readb(IOMD_DMAMASK);
- iomd_writeb(val | mask, IOMD_DMAMASK);
- }
- static void rpc_mask_irq_fiq(unsigned int irq)
- {
- unsigned int val, mask;
- mask = 1 << (irq & 7);
- val = iomd_readb(IOMD_FIQMASK);
- iomd_writeb(val & ~mask, IOMD_FIQMASK);
- }
- static void rpc_unmask_irq_fiq(unsigned int irq)
- {
- unsigned int val, mask;
- mask = 1 << (irq & 7);
- val = iomd_readb(IOMD_FIQMASK);
- iomd_writeb(val | mask, IOMD_FIQMASK);
- }
- static __inline__ void irq_init_irq(void)
- {
- int irq;
- iomd_writeb(0, IOMD_IRQMASKA);
- iomd_writeb(0, IOMD_IRQMASKB);
- iomd_writeb(0, IOMD_FIQMASK);
- iomd_writeb(0, IOMD_DMAMASK);
- for (irq = 0; irq < NR_IRQS; irq++) {
- switch (irq) {
- case 0 ... 6:
- irq_desc[irq].probe_ok = 1;
- case 7:
- irq_desc[irq].valid = 1;
- irq_desc[irq].mask_ack = rpc_mask_irq_ack_a;
- irq_desc[irq].mask = rpc_mask_irq_a;
- irq_desc[irq].unmask = rpc_unmask_irq_a;
- break;
- case 9 ... 15:
- irq_desc[irq].probe_ok = 1;
- case 8:
- irq_desc[irq].valid = 1;
- irq_desc[irq].mask_ack = rpc_mask_irq_b;
- irq_desc[irq].mask = rpc_mask_irq_b;
- irq_desc[irq].unmask = rpc_unmask_irq_b;
- break;
- case 16 ... 19:
- case 21:
- irq_desc[irq].noautoenable = 1;
- case 20:
- irq_desc[irq].valid = 1;
- irq_desc[irq].mask_ack = rpc_mask_irq_dma;
- irq_desc[irq].mask = rpc_mask_irq_dma;
- irq_desc[irq].unmask = rpc_unmask_irq_dma;
- break;
- case 64 ... 71:
- irq_desc[irq].valid = 1;
- irq_desc[irq].mask_ack = rpc_mask_irq_fiq;
- irq_desc[irq].mask = rpc_mask_irq_fiq;
- irq_desc[irq].unmask = rpc_unmask_irq_fiq;
- break;
- }
- }
- irq_desc[IRQ_KEYBOARDTX].noautoenable = 1;
- init_FIQ();
- }