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This commit is contained in:
Kartik Agaram 2019-09-27 11:20:00 -07:00
parent 514e7a1fd0
commit 33f7226aed
1 changed files with 15 additions and 16 deletions
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31
kernel.soso/common.h
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@ -21,24 +21,23 @@ typedef unsigned int size_t;
#define FALSE 0
#define NULL 0
// kernel memory map
// code
#define KERN_PAGE_DIRECTORY 0x00001000
#define KERN_BASE 0x00100000
//16M is identity mapped as below.
//First 8M we don't touch. Kernel code is there.
//4M is reserved for 4K page directories.
//4M is not used for now. kernel mini heap was here in old times.
#define RESERVED_AREA 0x01000000 //16 mb
#define KERN_PD_AREA_BEGIN 0x00800000 // 8 mb
#define KERN_PD_AREA_END 0x00C00000 //12 mb
#define KERN_NOTUSED_BEGIN 0x00C00000 //12 mb
#define KERN_NOTUSED_END 0x01000000 //16 mb
#define GFX_MEMORY 0x01000000 //16 mb
#define KERN_HEAP_BEGIN 0x02000000 //32 mb
#define KERN_HEAP_END 0x40000000 // 1 gb
// 4k page directories
#define KERN_PD_AREA_BEGIN 0x00800000 // 8 MB
#define KERN_PD_AREA_END 0x00C00000 // 12 MB
// 4MB unused (used to be for mini heap)
#define KERN_NOTUSED_BEGIN 0x00C00000 // 12 MB
#define KERN_NOTUSED_END 0x01000000 // 16 MB
//
#define RESERVED_AREA 0x01000000 // 16 MB
// frame buffer
#define GFX_MEMORY 0x01000000 // 16 MB
// heap
#define KERN_HEAP_BEGIN 0x02000000 // 32 MB
#define KERN_HEAP_END 0x40000000 // 1 GB
#define PAGE_INDEX_4K(addr) ((addr) >> 12)