minix/servers/vm/i386/memory.h

#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)
Basic VM and other minor improvements. Not complete, probably not fully debugged or optimized. 2008-11-19 13:26:10 +01:00			`#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`

start all processes, including VM, in VM_PROCSTART in linear address space, to make space for kernel to be able to map in things below there. 2009-05-11 21:11:37 +02:00			`/* Where do processes start in linear (i.e. page table) memory? */`
- 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 16:49:49 +02:00			`#define VM_PROCSTART (I386_BIG_PAGE_SIZE*100)`
start all processes, including VM, in VM_PROCSTART in linear address space, to make space for kernel to be able to map in things below there. 2009-05-11 21:11:37 +02:00
Basic VM and other minor improvements. Not complete, probably not fully debugged or optimized. 2008-11-19 13:26:10 +01:00			`#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)`