Minix/minix
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Added new BASE_MEM_TOP to restrict sys_vircopy() calls from BIOS.

Browse Source 
Updated comments at PRINTF_PROC --- it works again.
This commit is contained in:
Jorrit Herder
2005-07-21 18:32:49 +00:00
parent 808202ee30
commit 8d3e390bda
3 changed files with 9 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
include/ibm/memory.h
View File

@@ -18,6 +18,7 @@
/* Physical memory layout. Design decisions made for the earliest PCs, caused
* memory to be broken broken into the following four basic pieces:
* - Conventional or base memory: first 640 KB (incl. BIOS data, see below);
* The top of conventional memory is often used by the BIOS to store data.
* - Upper Memory Area (UMA): upper 384 KB of the first megabyte of memory;
* - High Memory Area (HMA): ~ first 64 KB of the second megabyte of memory;
* - Extended Memory: all the memory above first megabyte of memory.
@@ -26,6 +27,7 @@
* when the processor is in real mode.
*/
#define BASE_MEM_BEGIN 0x000000
#define BASE_MEM_TOP 0x090000
#define BASE_MEM_END 0x09FFFF
#define UPPER_MEM_BEGIN 0x0A0000