124 lines
3.6 KiB
C
124 lines
3.6 KiB
C
/*
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* PUPA -- Preliminary Universal Programming Architecture for GRUB
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* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
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*
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* PUPA is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with PUPA; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef PUPA_DISK_HEADER
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#define PUPA_DISK_HEADER 1
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#include <pupa/symbol.h>
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#include <pupa/err.h>
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#include <pupa/types.h>
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#include <pupa/device.h>
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struct pupa_disk;
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/* Disk device. */
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struct pupa_disk_dev
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{
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/* The device name. */
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const char *name;
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/* Call HOOK with each device name, until HOOK returns non-zero. */
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int (*iterate) (int (*hook) (const char *name));
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/* Open the device named NAME, and set up DISK. */
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pupa_err_t (*open) (const char *name, struct pupa_disk *disk);
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/* Close the disk DISK. */
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void (*close) (struct pupa_disk *disk);
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/* Read SIZE sectors from the sector SECTOR of the disk DISK into BUF. */
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pupa_err_t (*read) (struct pupa_disk *disk, unsigned long sector,
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unsigned long size, char *buf);
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/* Write SIZE sectors from BUF into the sector SECTOR of the disk DISK. */
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pupa_err_t (*write) (struct pupa_disk *disk, unsigned long sector,
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unsigned long size, const char *buf);
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/* The next disk device. */
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struct pupa_disk_dev *next;
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};
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typedef struct pupa_disk_dev *pupa_disk_dev_t;
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struct pupa_partition;
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/* Disk. */
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struct pupa_disk
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{
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/* The disk name. */
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const char *name;
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/* The underlying disk device. */
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pupa_disk_dev_t dev;
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/* The total number of sectors. */
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unsigned long total_sectors;
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/* If partitions can be stored. */
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int has_partitions;
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/* The id used by the disk cache manager. */
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unsigned long id;
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/* The partition information. This is machine-specific. */
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struct pupa_partition *partition;
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/* Called when a sector was read. */
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void (*read_hook) (unsigned long sector, unsigned offset, unsigned length);
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/* Device-specific data. */
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void *data;
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};
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typedef struct pupa_disk *pupa_disk_t;
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/* The sector size. */
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#define PUPA_DISK_SECTOR_SIZE 0x200
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#define PUPA_DISK_SECTOR_BITS 9
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/* The maximum number of disk caches. */
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#define PUPA_DISK_CACHE_NUM 1021
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/* The size of a disk cache in sector units. */
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#define PUPA_DISK_CACHE_SIZE 8
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#define PUPA_DISK_CACHE_BITS 3
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/* This is called from the memory manager. */
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void pupa_disk_cache_invalidate_all (void);
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void EXPORT_FUNC(pupa_disk_dev_register) (pupa_disk_dev_t dev);
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void EXPORT_FUNC(pupa_disk_dev_unregister) (pupa_disk_dev_t dev);
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void EXPORT_FUNC(pupa_disk_dev_iterate) (int (*hook) (const char *name));
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pupa_disk_t EXPORT_FUNC(pupa_disk_open) (const char *name);
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void EXPORT_FUNC(pupa_disk_close) (pupa_disk_t disk);
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pupa_err_t EXPORT_FUNC(pupa_disk_read) (pupa_disk_t disk,
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unsigned long sector,
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unsigned long offset,
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unsigned long size,
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char *buf);
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pupa_err_t EXPORT_FUNC(pupa_disk_write) (pupa_disk_t disk,
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unsigned long sector,
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unsigned long offset,
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unsigned long size,
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const char *buf);
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pupa_err_t EXPORT_FUNC(pupa_print_partinfo) (pupa_device_t disk,
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char *partname);
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#endif /* ! PUPA_DISK_HEADER */
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