/* * xpram.h -- definitions for the char module * *********/#include <linux/ioctl.h>#include <asm/atomic.h>#include <linux/major.h>/* version dependencies have been confined to a separate file *//* * Macros to help debugging */#define XPRAM_NAME "xpram"  /* name of device/module */#define XPRAM_DEVICE_NAME_PREFIX "slram" /* Prefix device name for major 35 */#define XPRAM_DEVS 1        /* one partition */#define XPRAM_RAHEAD 8      /* no real read ahead */#define XPRAM_PGSIZE 4096   /* page size of (expanded) mememory pages                             * according to S/390 architecture                             */#define XPRAM_BLKSIZE XPRAM_PGSIZE  /* must be equalt to page size ! */#define XPRAM_HARDSECT XPRAM_PGSIZE /* FIXME -- we have to deal with both                                     * this hard sect size and in some cases                                     * hard coded 512 bytes which I call                                     * soft sects:                                     */#define XPRAM_SOFTSECT 512#define XPRAM_MAX_DEVS 32   /* maximal number of devices (partitions) */#define XPRAM_MAX_DEVS1 33  /* maximal number of devices (partitions) +1 *//* The following macros depend on the sizes above */#define XPRAM_KB_IN_PG 4                     /* 4 kBs per page */#define XPRAM_KB_IN_PG_ORDER 2               /* 2^? kBs per page *//* Eventhough XPRAM_HARDSECT is set to 4k some data structures use hard * coded 512 byte sa sector size */#define XPRAM_SEC2KB(x) ((x >> 1) + (x & 1)) /* modifier used to compute size                                                 in kB from number of sectors */#define XPRAM_SEC_IN_PG 8                    /* 8 sectors per page */#define XPRAM_SEC_IN_PG_ORDER 3              /* 2^? sectors per page */#define XPRAM_UNUSED 40                     /* unused space between devices,                                              * in kB, i.e.                                             * must be a multiple of 4                                             *//* * The xpram device is removable: if it is left closed for more than * half a minute, it is removed. Thus use a usage count and a * kernel timer */typedef struct Xpram_Dev {   int            size;   /* size in KB not in Byte - RB - */   atomic_t       usage;   char *         device_name;   /* device name prefix in devfs */   devfs_handle_t devfs_entry;   /* handle needed to unregister dev from devfs */   u8 *data;}              Xpram_Dev;/* 2.2: void xpram_setup (char *, int *); *//* begin 2.3 */int xpram_setup (char *);/* end 2.3 */int xpram_init(void);