include/minix/vm.h

   1 /* Prototypes and definitions for VM interface. */
   2
   3 #ifndef _MINIX_VM_H
   4 #define _MINIX_VM_H
   5
   6 #include <sys/types.h>
   7 #include <minix/endpoint.h>
   8
   9 int vm_exit(endpoint_t ep);
  10 int vm_fork(endpoint_t ep, int slotno, endpoint_t *child_ep);
  11 int vm_willexit(endpoint_t ep);
  12 int vm_adddma(endpoint_t proc_e, phys_bytes start, phys_bytes size);
  13 int vm_deldma(endpoint_t proc_e, phys_bytes start, phys_bytes size);
  14 int vm_getdma(endpoint_t *procp, phys_bytes *basep, phys_bytes *sizep);
  15 void *vm_map_phys(endpoint_t who, void *physaddr, size_t len);
  16 int vm_unmap_phys(endpoint_t who, void *vaddr, size_t len);
  17
  18 int vm_notify_sig(endpoint_t ep, endpoint_t ipc_ep);
  19 int vm_set_priv(endpoint_t ep, void *buf, int sys_proc);
  20 int vm_update(endpoint_t src_e, endpoint_t dst_e);
  21 int vm_memctl(endpoint_t ep, int req);
  22 int vm_query_exit(endpoint_t *endpt);
  23 int vm_watch_exit(endpoint_t ep);
  24 int vm_forgetblock(u64_t id);
  25 void vm_forgetblocks(void);
  26 int minix_vfs_mmap(endpoint_t who, off_t offset, size_t len,
  27         dev_t dev, ino_t ino, int fd, u32_t vaddr, u16_t clearend, u16_t
  28         flags);
  29
  30 void *minix_mmap_for(endpoint_t forwhom,
  31         void *addr, size_t len, int prot, int flags, int fd, off_t offset);
  32 int minix_vfs_mmap(endpoint_t who, off_t offset, size_t len,
  33         dev_t dev, ino_t ino, int fd, u32_t vaddr, u16_t clearend,
  34         u16_t flags);
  35
  36 /* minix vfs mmap flags */
  37 #define MVM_WRITABLE    0x8000
  38
  39 /* VM kernel request types. */
  40 #define VMPTYPE_NONE            0
  41 #define VMPTYPE_CHECK           1
  42
  43 struct vm_stats_info {
  44   unsigned int vsi_pagesize;    /* page size */
  45   unsigned long vsi_total;      /* total number of memory pages */
  46   unsigned long vsi_free;       /* number of free pages */
  47   unsigned long vsi_largest;    /* largest number of consecutive free pages */
  48   unsigned long vsi_cached;     /* number of pages cached for file systems */
  49 };
  50
  51 struct vm_usage_info {
  52   vir_bytes vui_total;          /* total amount of process memory */
  53   vir_bytes vui_common;         /* part of memory mapped in more than once */
  54   vir_bytes vui_shared;         /* shared (non-COW) part of common memory */
  55 };
  56
  57 struct vm_region_info {
  58   vir_bytes vri_addr;           /* base address of region */
  59   vir_bytes vri_length;         /* length of region */
  60   int vri_prot;                 /* protection flags (PROT_) */
  61   int vri_flags;                /* memory flags (subset of MAP_) */
  62 };
  63
  64 #define MAX_VRI_COUNT   64      /* max. number of regions provided at once */
  65
  66 int vm_info_stats(struct vm_stats_info *vfi);
  67 int vm_info_usage(endpoint_t who, struct vm_usage_info *vui);
  68 int vm_info_region(endpoint_t who, struct vm_region_info *vri, int
  69         count, vir_bytes *next);
  70 int vm_procctl_clear(endpoint_t ep);
  71 int vm_procctl_handlemem(endpoint_t ep, vir_bytes m1, vir_bytes m2, int wr);
  72
  73 int vm_set_cacheblock(void *block, dev_t dev, off_t dev_offset,
  74         ino_t ino, off_t ino_offset, u32_t *flags, int blocksize);
  75
  76 void *vm_map_cacheblock(dev_t dev, off_t dev_offset,
  77         ino_t ino, off_t ino_offset, u32_t *flags, int blocksize);
  78
  79 int vm_clear_cache(dev_t dev);
  80
  81 /* flags for vm cache functions */
  82 #define VMMC_FLAGS_LOCKED       0x01    /* someone is updating the flags; don't read/write */
  83 #define VMMC_DIRTY              0x02    /* dirty buffer and it may not be evicted */
  84 #define VMMC_EVICTED            0x04    /* VM has evicted the buffer and it's invalid */
  85 #define VMMC_BLOCK_LOCKED       0x08    /* client is using it and it may not be evicted */
  86
  87 /* special inode number for vm cache functions */
  88 #define VMC_NO_INODE            0       /* to reference a disk block, no associated file */
  89
  90 #endif /* _MINIX_VM_H */
  91