31 lines
1.0 KiB
C
31 lines
1.0 KiB
C
|
/****************************************************************
|
||
|
|
* *
|
||
|
|
* Copyright 2001 Sanchez Computer Associates, Inc. *
|
||
|
|
* *
|
||
|
|
* This source code contains the intellectual property *
|
||
|
|
* of its copyright holder(s), and is made available *
|
||
|
|
* under a license. If you do not know the terms of *
|
||
|
|
* the license, please stop and do not read further. *
|
||
|
|
* *
|
||
|
|
****************************************************************/
|
||
|
|
|
||
|
|
/* mmseg is used by get_mmseg()/put_mmseg()/rel_mmseg()
|
||
|
|
* get/put/rel_mmseg() manage virtual address space for MM segments.
|
||
|
|
* We want to push MM segments to high address space so that there is enough
|
||
|
|
* lower address space available for other uses like stacks etc. The current
|
||
|
|
* scheme is for control segments to start from 1G, and MM segments to start
|
||
|
|
* from 4G, and all the rest should stay below 1G.
|
||
|
|
*/
|
||
|
|
typedef struct mmseg_struct
|
||
|
|
{
|
||
|
|
struct mmseg_struct *next;
|
||
|
|
sm_uc_ptr_t begin;
|
||
|
|
sm_uc_ptr_t end;
|
||
|
|
} mmseg;
|
||
|
|
|
||
|
|
caddr_t get_mmseg(size_t size);
|
||
|
|
void put_mmseg(caddr_t begin, size_t size);
|
||
|
|
void rel_mmseg(caddr_t begin);
|
||
|
|
|
||
|
|
|