e929676268
. ioctl, transfer and 'other' functions get an extra parameter: 'safe', int
is nonzero if function is called with *_S variant ('other' if ioctl)
92 lines
3.4 KiB
C
92 lines
3.4 KiB
C
/* Types and constants shared between the generic and device dependent
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* device driver code.
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*/
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#define _POSIX_SOURCE 1 /* tell headers to include POSIX stuff */
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#define _MINIX 1 /* tell headers to include MINIX stuff */
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#define _SYSTEM 1 /* get negative error number in <errno.h> */
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/* The following are so basic, all the *.c files get them automatically. */
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#include <minix/config.h> /* MUST be first */
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#include <ansi.h> /* MUST be second */
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#include <minix/type.h>
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#include <minix/ipc.h>
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#include <minix/com.h>
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#include <minix/callnr.h>
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#include <sys/types.h>
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#include <minix/const.h>
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#include <minix/syslib.h>
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#include <minix/sysutil.h>
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#include <string.h>
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#include <limits.h>
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#include <stddef.h>
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#include <errno.h>
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#include <minix/partition.h>
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#include <minix/u64.h>
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/* Info about and entry points into the device dependent code. */
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struct driver {
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_PROTOTYPE( char *(*dr_name), (void) );
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_PROTOTYPE( int (*dr_open), (struct driver *dp, message *m_ptr) );
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_PROTOTYPE( int (*dr_close), (struct driver *dp, message *m_ptr) );
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_PROTOTYPE( int (*dr_ioctl), (struct driver *dp, message *m_ptr, int safe) );
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_PROTOTYPE( struct device *(*dr_prepare), (int device) );
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_PROTOTYPE( int (*dr_transfer), (int proc_nr, int opcode, off_t position,
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iovec_t *iov, unsigned nr_req, int safe) );
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_PROTOTYPE( void (*dr_cleanup), (void) );
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_PROTOTYPE( void (*dr_geometry), (struct partition *entry) );
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_PROTOTYPE( void (*dr_signal), (struct driver *dp, message *m_ptr) );
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_PROTOTYPE( void (*dr_alarm), (struct driver *dp, message *m_ptr) );
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_PROTOTYPE( int (*dr_cancel), (struct driver *dp, message *m_ptr) );
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_PROTOTYPE( int (*dr_select), (struct driver *dp, message *m_ptr) );
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_PROTOTYPE( int (*dr_other), (struct driver *dp, message *m_ptr, int safe) );
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_PROTOTYPE( int (*dr_hw_int), (struct driver *dp, message *m_ptr) );
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};
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#if (CHIP == INTEL)
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/* Number of bytes you can DMA before hitting a 64K boundary: */
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#define dma_bytes_left(phys) \
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((unsigned) (sizeof(int) == 2 ? 0 : 0x10000) - (unsigned) ((phys) & 0xFFFF))
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#endif /* CHIP == INTEL */
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/* Base and size of a partition in bytes. */
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struct device {
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u64_t dv_base;
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u64_t dv_size;
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};
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#define NIL_DEV ((struct device *) 0)
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/* Functions defined by driver.c: */
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_PROTOTYPE( void driver_task, (struct driver *dr) );
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_PROTOTYPE( char *no_name, (void) );
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_PROTOTYPE( int do_nop, (struct driver *dp, message *m_ptr) );
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_PROTOTYPE( struct device *nop_prepare, (int device) );
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_PROTOTYPE( void nop_cleanup, (void) );
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_PROTOTYPE( void nop_task, (void) );
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_PROTOTYPE( void nop_signal, (struct driver *dp, message *m_ptr) );
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_PROTOTYPE( void nop_alarm, (struct driver *dp, message *m_ptr) );
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_PROTOTYPE( int nop_cancel, (struct driver *dp, message *m_ptr) );
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_PROTOTYPE( int nop_select, (struct driver *dp, message *m_ptr) );
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_PROTOTYPE( int do_diocntl, (struct driver *dp, message *m_ptr, int safe) );
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_PROTOTYPE( int nop_ioctl, (struct driver *dp, message *m_ptr, int safe) );
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/* Parameters for the disk drive. */
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#define SECTOR_SIZE 512 /* physical sector size in bytes */
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#define SECTOR_SHIFT 9 /* for division */
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#define SECTOR_MASK 511 /* and remainder */
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/* Size of the DMA buffer buffer in bytes. */
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#define USE_EXTRA_DMA_BUF 0 /* usually not needed */
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#define DMA_BUF_SIZE (DMA_SECTORS * SECTOR_SIZE)
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#if (CHIP == INTEL)
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extern u8_t *tmp_buf; /* the DMA buffer */
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#else
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extern u8_t tmp_buf[]; /* the DMA buffer */
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#endif
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extern phys_bytes tmp_phys; /* phys address of DMA buffer */
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