kern

diff src/vm.h @ 68:0a205396e1a0

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- added a generic red-black tree data structure - added a VM map as an red-black tree of vm_pages in the process structure - constructed the vm map of the memory passed by the kernel initially to the first process.
author John Tsiombikas <nuclear@mutantstargoat.com>
date Mon, 10 Oct 2011 04:16:01 +0300
parents 437360696883
children b45e2d5f0ae1
line diff
     1.1 --- a/src/vm.h	Sun Oct 09 20:38:35 2011 +0300
     1.2 +++ b/src/vm.h	Mon Oct 10 04:16:01 2011 +0300
     1.3 @@ -3,8 +3,10 @@
     1.4  
     1.5  #include <stdlib.h>
     1.6  #include "mboot.h"
     1.7 +#include "rbtree.h"
     1.8  
     1.9  #define KMEM_START		0xc0000000
    1.10 +#define KMEM_START_PAGE	ADDR_TO_PAGE(KMEM_START)
    1.11  
    1.12  /* page mapping flags */
    1.13  #define PG_PRESENT			(1 << 0)
    1.14 @@ -44,6 +46,13 @@
    1.15  #define PAGE_ONLY		0
    1.16  #define WHOLE_PATH		1
    1.17  
    1.18 +struct vm_page {
    1.19 +	int vpage, ppage;
    1.20 +	unsigned int flags;
    1.21 +
    1.22 +	int nref;
    1.23 +};
    1.24 +
    1.25  void init_vm(void);
    1.26  
    1.27  int map_page(int vpage, int ppage, unsigned int attr);
    1.28 @@ -70,6 +79,9 @@
    1.29  void set_page_bit(int pgnum, uint32_t bit, int wholepath);
    1.30  void clear_page_bit(int pgnum, uint32_t bit, int wholepath);
    1.31  
    1.32 +/* construct the vm map for the current user mappings */
    1.33 +int cons_vmmap(struct rbtree *vmmap);
    1.34 +
    1.35  void dbg_print_vm(int area);
    1.36  
    1.37  /* defined in vm-asm.S */