2dd02cc560
read/write writable in the pagetable right away instead of waiting for a pagefault. minor optimization. some a sanity check of SLAB-allocated pointers. vm gets its own _exit and __exit like PM, so the stock (library) panic works.
56 lines
1.6 KiB
C
56 lines
1.6 KiB
C
|
|
#ifndef _REGION_H
|
|
#define _REGION_H 1
|
|
|
|
struct phys_block {
|
|
#if SANITYCHECKS
|
|
u32_t seencount;
|
|
#endif
|
|
vir_bytes offset; /* offset from start of vir region */
|
|
vir_bytes length; /* no. of contiguous bytes */
|
|
phys_bytes phys; /* physical memory */
|
|
u8_t refcount; /* Refcount of these pages */
|
|
|
|
/* first in list of phys_regions that reference this block */
|
|
struct phys_region *firstregion;
|
|
};
|
|
|
|
struct phys_region {
|
|
struct phys_region *next; /* next contiguous block */
|
|
struct phys_block *ph;
|
|
struct vir_region *parent; /* Region that owns this phys_region. */
|
|
|
|
/* list of phys_regions that reference the same phys_block */
|
|
struct phys_region *next_ph_list;
|
|
};
|
|
|
|
struct vir_region {
|
|
struct vir_region *next; /* next virtual region in this process */
|
|
vir_bytes vaddr; /* virtual address, offset from pagetable */
|
|
vir_bytes length; /* length in bytes */
|
|
struct phys_region *first; /* phys regions in vir region */
|
|
u16_t flags;
|
|
u32_t tag; /* Opaque to mapping code. */
|
|
struct vmproc *parent; /* Process that owns this vir_region. */
|
|
};
|
|
|
|
/* Mapping flags: */
|
|
#define VR_WRITABLE 0x01 /* Process may write here. */
|
|
#define VR_NOPF 0x02 /* May not generate page faults. */
|
|
#define VR_PHYS64K 0x04 /* Physical memory must be 64k aligned. */
|
|
|
|
/* Mapping type: */
|
|
#define VR_ANON 0x10 /* Memory to be cleared and allocated */
|
|
#define VR_DIRECT 0x20 /* Mapped, but not managed by VM */
|
|
|
|
/* Tag values: */
|
|
#define VRT_NONE 0xBEEF0000
|
|
#define VRT_HEAP 0xBEEF0001
|
|
#define VRT_CODE 0xBEEF0002
|
|
|
|
/* map_page_region flags */
|
|
#define MF_PREALLOC 0x01
|
|
#define MF_CONTIG 0x02
|
|
|
|
#endif
|
|
|