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phoenix |
/* $Id: driver.h,v 1.1.1.1 2004-04-15 02:42:30 phoenix Exp $
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1992 - 1997, 2000-2003 Silicon Graphics, Inc. All rights reserved.
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*/
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#ifndef _ASM_IA64_SN_DRIVER_H
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#define _ASM_IA64_SN_DRIVER_H
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#include <asm/sn/sgi.h>
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#include <asm/types.h>
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/*
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** Interface for device driver handle management.
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**
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** These functions are mostly for use by the loadable driver code, and
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** for use by I/O bus infrastructure code.
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*/
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typedef struct device_driver_s *device_driver_t;
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/* == Driver thread priority support == */
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typedef int ilvl_t;
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct eframe_s;
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struct piomap;
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struct dmamap;
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typedef __psunsigned_t iobush_t;
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/* interrupt function */
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typedef void *intr_arg_t;
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typedef void intr_func_f(intr_arg_t);
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typedef intr_func_f *intr_func_t;
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#define INTR_ARG(n) ((intr_arg_t)(__psunsigned_t)(n))
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/* system interrupt resource handle -- returned from intr_alloc */
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typedef struct intr_s *intr_t;
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#define INTR_HANDLE_NONE ((intr_t)0)
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/*
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* restore interrupt level value, returned from intr_block_level
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* for use with intr_unblock_level.
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*/
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typedef void *rlvl_t;
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/*
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* A basic, platform-independent description of I/O requirements for
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* a device. This structure is usually formed by lboot based on information
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* in configuration files. It contains information about PIO, DMA, and
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* interrupt requirements for a specific instance of a device.
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*
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* The pio description is currently unused.
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*
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* The dma description describes bandwidth characteristics and bandwidth
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* allocation requirements. (TBD)
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*
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* The Interrupt information describes the priority of interrupt, desired
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* destination, policy (TBD), whether this is an error interrupt, etc.
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* For now, interrupts are targeted to specific CPUs.
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*/
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typedef struct device_desc_s {
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/* pio description (currently none) */
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/* dma description */
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/* TBD: allocated badwidth requirements */
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/* interrupt description */
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vertex_hdl_t intr_target; /* Hardware locator string */
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int intr_policy; /* TBD */
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ilvl_t intr_swlevel; /* software level for blocking intr */
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char *intr_name; /* name of interrupt, if any */
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int flags;
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} *device_desc_t;
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/* flag values */
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#define D_INTR_ISERR 0x1 /* interrupt is for error handling */
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#define D_IS_ASSOC 0x2 /* descriptor is associated with a dev */
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#define D_INTR_NOTHREAD 0x4 /* Interrupt handler isn't threaded. */
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#define INTR_SWLEVEL_NOTHREAD_DEFAULT 0 /* Default
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* Interrupt level in case of
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* non-threaded interrupt
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* handlers
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*/
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#endif /* _ASM_IA64_SN_DRIVER_H */
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