diff options
Diffstat (limited to 'kernel/old/include/bootstrap.h')
| -rw-r--r-- | kernel/old/include/bootstrap.h | 101 |
1 files changed, 51 insertions, 50 deletions
diff --git a/kernel/old/include/bootstrap.h b/kernel/old/include/bootstrap.h index 6c6dfcc..ade778a 100644 --- a/kernel/old/include/bootstrap.h +++ b/kernel/old/include/bootstrap.h @@ -9,89 +9,89 @@ ** Addresses where various stuff goes in memory. */ -#ifndef BOOTSTRAP_H_ -#define BOOTSTRAP_H_ +#ifndef BOOTSTRAP_H_ +#define BOOTSTRAP_H_ /* ** The boot device */ -#define BDEV_FLOPPY 0x00 -#define BDEV_USB 0x80 /* hard drive */ +#define BDEV_FLOPPY 0x00 +#define BDEV_USB 0x80 /* hard drive */ -#define BDEV BDEV_USB /* default */ +#define BDEV BDEV_USB /* default */ /* ** Bootstrap definitions */ -#define BOOT_SEG 0x07c0 /* 07c0:0000 */ -#define BOOT_DISP 0x0000 -#define BOOT_ADDR ((BOOT_SEG << 4) + BOOT_DISP) +#define BOOT_SEG 0x07c0 /* 07c0:0000 */ +#define BOOT_DISP 0x0000 +#define BOOT_ADDR ((BOOT_SEG << 4) + BOOT_DISP) -#define PART2_DISP 0x0200 /* 07c0:0200 */ -#define PART2_ADDR ((BOOT_SEG << 4) + PART2_DISP) +#define PART2_DISP 0x0200 /* 07c0:0200 */ +#define PART2_ADDR ((BOOT_SEG << 4) + PART2_DISP) -#define SECTOR_SIZE 0x200 /* 512 bytes */ +#define SECTOR_SIZE 0x200 /* 512 bytes */ /* Note: this assumes the bootstrap is two sectors long! */ -#define BOOT_SIZE (SECTOR_SIZE + SECTOR_SIZE) +#define BOOT_SIZE (SECTOR_SIZE + SECTOR_SIZE) -#define OFFSET_LIMIT (0x10000 - SECTOR_SIZE) +#define OFFSET_LIMIT (0x10000 - SECTOR_SIZE) -#define BOOT_SP_DISP 0x4000 /* stack pointer 07c0:4000, or 0xbc00 */ -#define BOOT_SP_ADDR ((BOOT_SEG << 4) + BOOT_SP_DISP) +#define BOOT_SP_DISP 0x4000 /* stack pointer 07c0:4000, or 0xbc00 */ +#define BOOT_SP_ADDR ((BOOT_SEG << 4) + BOOT_SP_DISP) -#define SECTOR1_END (BOOT_ADDR + SECTOR_SIZE) -#define SECTOR2_END (BOOT_ADDR + BOOT_SIZE) +#define SECTOR1_END (BOOT_ADDR + SECTOR_SIZE) +#define SECTOR2_END (BOOT_ADDR + BOOT_SIZE) // location of the user blob data // (three halfwords of data) -#define USER_BLOB_DATA (SECTOR2_END - 12) +#define USER_BLOB_DATA (SECTOR2_END - 12) /* ** The target program itself */ -#define TARGET_SEG 0x00001000 /* 1000:0000 */ -#define TARGET_ADDR 0x00010000 /* and upward */ -#define TARGET_STACK 0x00010000 /* and downward */ +#define TARGET_SEG 0x00001000 /* 1000:0000 */ +#define TARGET_ADDR 0x00010000 /* and upward */ +#define TARGET_STACK 0x00010000 /* and downward */ /* ** The Global Descriptor Table (0000:0500 - 0000:2500) */ -#define GDT_SEG 0x00000050 -#define GDT_ADDR 0x00000500 +#define GDT_SEG 0x00000050 +#define GDT_ADDR 0x00000500 -/* segment register values */ -#define GDT_LINEAR 0x0008 /* All of memory, R/W */ -#define GDT_CODE 0x0010 /* All of memory, R/E */ -#define GDT_DATA 0x0018 /* All of memory, R/W */ -#define GDT_STACK 0x0020 /* All of memory, R/W */ + /* segment register values */ +#define GDT_LINEAR 0x0008 /* All of memory, R/W */ +#define GDT_CODE 0x0010 /* All of memory, R/E */ +#define GDT_DATA 0x0018 /* All of memory, R/W */ +#define GDT_STACK 0x0020 /* All of memory, R/W */ /* ** The Interrupt Descriptor Table (0000:2500 - 0000:2D00) */ -#define IDT_SEG 0x00000250 -#define IDT_ADDR 0x00002500 +#define IDT_SEG 0x00000250 +#define IDT_ADDR 0x00002500 /* ** Additional I/O ports used by the bootstrap code */ // keyboard controller -#define KBD_DATA 0x60 -#define KBD_CMD 0x64 -#define KBD_STAT 0x64 +#define KBD_DATA 0x60 +#define KBD_CMD 0x64 +#define KBD_STAT 0x64 // status register bits -#define KBD_OBSTAT 0x01 -#define KBD_IBSTAT 0x02 -#define KBD_SYSFLAG 0x04 -#define KBD_CMDDAT 0x08 +#define KBD_OBSTAT 0x01 +#define KBD_IBSTAT 0x02 +#define KBD_SYSFLAG 0x04 +#define KBD_CMDDAT 0x08 // commands -#define KBD_P1_DISABLE 0xad -#define KBD_P1_ENABLE 0xae -#define KBD_RD_OPORT 0xd0 -#define KBD_WT_OPORT 0xd1 +#define KBD_P1_DISABLE 0xad +#define KBD_P1_ENABLE 0xae +#define KBD_RD_OPORT 0xd0 +#define KBD_WT_OPORT 0xd1 #ifdef ASM_SRC @@ -104,16 +104,17 @@ // .byte granularity byte // .byte upper 8 bits of base // we use 4K units, so we ignore the lower 12 bits of the limit -#define SEGNULL .word 0, 0, 0, 0 +#define SEGNULL \ + .word 0, 0, 0, 0 -#define SEGMENT(base, limit, dpl, type) \ - .word(((limit) >> 12) & 0xffff); \ - .word((base) & 0xffff); \ - .byte(((base) >> 16) & 0xff); \ - .byte(SEG_PRESENT | (dpl) | SEG_NON_SYSTEM | (type)); \ - .byte(SEG_GRAN_4KBYTE | SEG_DB_32BIT | (((limit) >> 28) & 0xf)); \ - .byte(((base) >> 24) & 0xff) +#define SEGMENT(base,limit,dpl,type) \ + .word (((limit) >> 12) & 0xffff); \ + .word ((base) & 0xffff) ; \ + .byte (((base) >> 16) & 0xff) ; \ + .byte (SEG_PRESENT | (dpl) | SEG_NON_SYSTEM | (type)) ; \ + .byte (SEG_GRAN_4KBYTE | SEG_DB_32BIT | (((limit) >> 28) & 0xf)) ; \ + .byte (((base) >> 24) & 0xff) -#endif /* ASM_SRC */ +#endif /* ASM_SRC */ #endif |