mirror of https://github.com/tailix/kernel.git
28 lines
925 B
C
28 lines
925 B
C
#ifndef KERNEL_INCLUDED_CONFIG
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#define KERNEL_INCLUDED_CONFIG 1
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#define MEM_UPPER_BASE ((unsigned long)(1 * 1024 * 1024)) // 1 MB
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#define IDT_SIZE 256 // maximal size
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#define GDT_NULL_INDEX 0
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#define GDT_KERNEL_CS_INDEX 1
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#define GDT_KERNEL_DS_INDEX 2
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#define GDT_USER_CS_INDEX 3
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#define GDT_USER_DS_INDEX 4
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#define GDT_TSS_INDEX 5
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#define GDT_SIZE 6
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#define GDT_DESCRIPTOR_SIZE 8 // bytes
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#define GDT_SEGMENT_SELECTOR(n) ((n) * GDT_DESCRIPTOR_SIZE)
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#define GDT_NULL_SELECTOR GDT_SEGMENT_SELECTOR(GDT_NULL_INDEX)
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#define GDT_KERNEL_CS_SELECTOR GDT_SEGMENT_SELECTOR(GDT_KERNEL_CS_INDEX)
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#define GDT_KERNEL_DS_SELECTOR GDT_SEGMENT_SELECTOR(GDT_KERNEL_DS_INDEX)
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#define GDT_USER_CS_SELECTOR (GDT_SEGMENT_SELECTOR(GDT_USER_CS_INDEX) | 3)
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#define GDT_USER_DS_SELECTOR (GDT_SEGMENT_SELECTOR(GDT_USER_DS_INDEX) | 3)
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#define GDT_TSS_SELECTOR GDT_SEGMENT_SELECTOR(GDT_TSS_INDEX)
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#endif
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