| 1 | /* Types and constants shared between the generic and device dependent
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| 2 | * device driver code.
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| 3 | */
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| 4 |
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| 5 | #define _POSIX_SOURCE 1 /* tell headers to include POSIX stuff */
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| 6 | #define _MINIX 1 /* tell headers to include MINIX stuff */
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| 7 | #define _SYSTEM 1 /* get negative error number in <errno.h> */
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| 8 |
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| 9 | /* The following are so basic, all the *.c files get them automatically. */
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| 10 | #include <minix/config.h> /* MUST be first */
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| 11 | #include <ansi.h> /* MUST be second */
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| 12 | #include <minix/type.h>
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| 13 | #include <minix/ipc.h>
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| 14 | #include <minix/com.h>
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| 15 | #include <minix/callnr.h>
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| 16 | #include <sys/types.h>
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| 17 | #include <minix/const.h>
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| 18 | #include <minix/syslib.h>
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| 19 | #include <minix/sysutil.h>
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| 20 |
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| 21 | #include <string.h>
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| 22 | #include <limits.h>
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| 23 | #include <stddef.h>
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| 24 | #include <errno.h>
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| 25 |
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| 26 | #include <minix/partition.h>
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| 27 | #include <minix/u64.h>
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| 28 |
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| 29 | /* Info about and entry points into the device dependent code. */
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| 30 | struct driver {
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| 31 | _PROTOTYPE( char *(*dr_name), (void) );
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| 32 | _PROTOTYPE( int (*dr_open), (struct driver *dp, message *m_ptr) );
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| 33 | _PROTOTYPE( int (*dr_close), (struct driver *dp, message *m_ptr) );
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| 34 | _PROTOTYPE( int (*dr_ioctl), (struct driver *dp, message *m_ptr) );
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| 35 | _PROTOTYPE( struct device *(*dr_prepare), (int device) );
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| 36 | _PROTOTYPE( int (*dr_transfer), (int proc_nr, int opcode, off_t position,
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| 37 | iovec_t *iov, unsigned nr_req) );
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| 38 | _PROTOTYPE( void (*dr_cleanup), (void) );
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| 39 | _PROTOTYPE( void (*dr_geometry), (struct partition *entry) );
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| 40 | _PROTOTYPE( void (*dr_signal), (struct driver *dp, message *m_ptr) );
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| 41 | _PROTOTYPE( void (*dr_alarm), (struct driver *dp, message *m_ptr) );
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| 42 | _PROTOTYPE( int (*dr_cancel), (struct driver *dp, message *m_ptr) );
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| 43 | _PROTOTYPE( int (*dr_select), (struct driver *dp, message *m_ptr) );
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| 44 | _PROTOTYPE( int (*dr_other), (struct driver *dp, message *m_ptr) );
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| 45 | _PROTOTYPE( int (*dr_hw_int), (struct driver *dp, message *m_ptr) );
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| 46 | };
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| 47 |
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| 48 | #if (CHIP == INTEL)
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| 49 |
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| 50 | /* Number of bytes you can DMA before hitting a 64K boundary: */
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| 51 | #define dma_bytes_left(phys) \
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| 52 | ((unsigned) (sizeof(int) == 2 ? 0 : 0x10000) - (unsigned) ((phys) & 0xFFFF))
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| 53 |
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| 54 | #endif /* CHIP == INTEL */
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| 55 |
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| 56 | /* Base and size of a partition in bytes. */
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| 57 | struct device {
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| 58 | u64_t dv_base;
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| 59 | u64_t dv_size;
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| 60 | };
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| 61 |
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| 62 | #define NIL_DEV ((struct device *) 0)
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| 63 |
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| 64 | /* Functions defined by driver.c: */
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| 65 | _PROTOTYPE( void driver_task, (struct driver *dr) );
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| 66 | _PROTOTYPE( char *no_name, (void) );
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| 67 | _PROTOTYPE( int do_nop, (struct driver *dp, message *m_ptr) );
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| 68 | _PROTOTYPE( struct device *nop_prepare, (int device) );
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| 69 | _PROTOTYPE( void nop_cleanup, (void) );
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| 70 | _PROTOTYPE( void nop_task, (void) );
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| 71 | _PROTOTYPE( void nop_signal, (struct driver *dp, message *m_ptr) );
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| 72 | _PROTOTYPE( void nop_alarm, (struct driver *dp, message *m_ptr) );
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| 73 | _PROTOTYPE( int nop_cancel, (struct driver *dp, message *m_ptr) );
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| 74 | _PROTOTYPE( int nop_select, (struct driver *dp, message *m_ptr) );
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| 75 | _PROTOTYPE( int do_diocntl, (struct driver *dp, message *m_ptr) );
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| 76 |
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| 77 | /* Parameters for the disk drive. */
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| 78 | #define SECTOR_SIZE 512 /* physical sector size in bytes */
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| 79 | #define SECTOR_SHIFT 9 /* for division */
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| 80 | #define SECTOR_MASK 511 /* and remainder */
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| 81 |
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| 82 | /* Size of the DMA buffer buffer in bytes. */
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| 83 | #define USE_EXTRA_DMA_BUF 0 /* usually not needed */
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| 84 | #define DMA_BUF_SIZE (DMA_SECTORS * SECTOR_SIZE)
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| 85 |
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| 86 | #if (CHIP == INTEL)
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| 87 | extern u8_t *tmp_buf; /* the DMA buffer */
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| 88 | #else
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| 89 | extern u8_t tmp_buf[]; /* the DMA buffer */
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| 90 | #endif
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| 91 | extern phys_bytes tmp_phys; /* phys address of DMA buffer */
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