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- #ifndef __BOOT_ASM_H__
- #define __BOOT_ASM_H__
-
- /* Assembler macros to create x86 segments */
-
- /* Normal segment */
- #define SEG_NULLASM \
- .word 0, 0; \
- .byte 0, 0, 0, 0
-
- #define SEG_ASM(type,base,lim) \
- .word (((lim) >> 12) & 0xffff), ((base) & 0xffff); \
- .byte (((base) >> 16) & 0xff), (0x90 | (type)), \
- (0xC0 | (((lim) >> 28) & 0xf)), (((base) >> 24) & 0xff)
-
-
- /* Application segment type bits */
- #define STA_X 0x8 // Executable segment
- #define STA_E 0x4 // Expand down (non-executable segments)
- #define STA_C 0x4 // Conforming code segment (executable only)
- #define STA_W 0x2 // Writeable (non-executable segments)
- #define STA_R 0x2 // Readable (executable segments)
- #define STA_A 0x1 // Accessed
-
- #endif /* !__BOOT_ASM_H__ */
-
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