minix/servers/vm/i386/memory.h
Ben Gras 32fbbd370c - pages that points to page directory values of all processes,
shared with the kernel, mapped into kernel address space; 
   kernel is notified of its location. kernel segment size is
   increased to make it fit.
 - map in kernel and other processes that don't have their
   own page table using single 4MB (global) mapping.
 - new sanity check facility: objects that are allocated with
   the slab allocator are, when running with sanity checking on,
   marked readonly until they are explicitly unlocked using the USE()
   macro.
 - another sanity check facility: collect all uses of memory and
   see if they don't overlap with (a) eachother and (b) free memory
 - own munmap() and munmap_text() functions.
 - exec() recovers from out-of-memory conditions properly now; this
   solves some weird exec() behaviour
 - chew off memory from the same side of the chunk as where we
   start scanning, solving some memory fragmentation issues
 - use avl trees for freelist and phys_ranges in regions
 - implement most useful part of munmap()
 - remap() stuff is GQ's for shared memory
2009-09-21 14:49:49 +00:00

28 lines
1 KiB
C

#include <sys/vm_i386.h>
/* As visible from the user space process, where is the top of the
* stack (first non-stack byte), when in paged mode?
*/
#define VM_STACKTOP 0x80000000
/* And what is the highest addressable piece of memory, when in paged
* mode? Some data for kernel and stack are subtracted from this, the
* final results stored in bytes in arch.vm_data_top.
*/
#define VM_DATATOP 0xFFFFF000
#define SLAB_PAGESIZE I386_PAGE_SIZE
#define VM_PAGE_SIZE I386_PAGE_SIZE
/* Where do processes start in linear (i.e. page table) memory? */
#define VM_PROCSTART (I386_BIG_PAGE_SIZE*100)
#define CLICKSPERPAGE (I386_PAGE_SIZE/CLICK_SIZE)
/* Where is the kernel? */
#define KERNEL_TEXT CLICK2ABS(vmproc[VMP_SYSTEM].vm_arch.vm_seg[T].mem_phys)
#define KERNEL_TEXT_LEN CLICK2ABS(vmproc[VMP_SYSTEM].vm_arch.vm_seg[T].mem_len)
#define KERNEL_DATA CLICK2ABS(vmproc[VMP_SYSTEM].vm_arch.vm_seg[D].mem_phys)
#define KERNEL_DATA_LEN CLICK2ABS(vmproc[VMP_SYSTEM].vm_arch.vm_seg[D].mem_len \
+ vmproc[VMP_SYSTEM].vm_arch.vm_seg[S].mem_len)