24 lines
1.2 KiB
C
24 lines
1.2 KiB
C
#ifndef GLOBAL_H
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#define GLOBAL_H
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#include "../cpu/types.h"
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#include "linked.h"
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// Using defines allows this file to control the ranges here rather than updating the kernel code lines
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// somewhere else at various locations throughout the code
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// using ALL CAPS is a conventions for defines and constants, that varies from group to group
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#define KMEM_START 0x9000 // starts equal to this address for allocation
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#define KMEM_END 0x10000 // cannot be equal to or more than this address
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extern u32 kmem_addr; // The start value of allocation kernel datastructure allocations
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extern u32 kernel_mem_limit; // the upper limit of memory allowed for kernel memory allocations
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#define UMEM_START 0x10000 // kernel memory for linked list nodes starts here
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#define UMEM_END 0x40000 // kernel memory for linked list nodes must end before here
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extern u32 umem_addr; // start of linked list memory allocation address
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extern u32 user_mem_limit; // end of linked list memory allocation address
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extern u32 global_id; // Just an id for now but will eventually become PID
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extern node *global_head; // Kernel data structure for storing memory allocation linked list
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#endif // GLOBAL_H
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