/* General constants used by the kernel. */ #if (CHIP == INTEL) #define K_STACK_BYTES 512 /* how many bytes for the kernel stack */ #define INIT_PSW 0x0200 /* initial psw */ #define INIT_TASK_PSW 0x1200 /* initial psw for tasks (with IOPL 1) */ #define TRACEBIT 0x100 /* OR this with psw in proc[] for tracing */ #define SETBITS(rp, new) /* permits only certain bits to be set */ \ ((rp)->p_reg.psw = (rp)->p_reg.psw & ~0xCD5 | (new) & 0xCD5) /* Initial sp for mm, fs and init. * 2 bytes for short jump * 2 bytes unused * 3 words for init_org[] used by fs only * 3 words for real mode debugger trap (actually needs 1 more) * 3 words for save and restart temporaries * 3 words for interrupt * Leave no margin, to flush bugs early. */ #define INIT_SP (2 + 2 + 3 * 2 + 3 * 2 + 3 * 2 + 3 * 2) #define HCLICK_SHIFT 4 /* log2 of HCLICK_SIZE */ #define HCLICK_SIZE 16 /* hardware segment conversion magic */ #if CLICK_SIZE >= HCLICK_SIZE #define click_to_hclick(n) ((n) << (CLICK_SHIFT - HCLICK_SHIFT)) #else #define click_to_hclick(n) ((n) >> (HCLICK_SHIFT - CLICK_SHIFT)) #endif #define hclick_to_physb(n) ((phys_bytes) (n) << HCLICK_SHIFT) #define physb_to_hclick(n) ((n) >> HCLICK_SHIFT) #define ALIGNMENT 4 /* align large items to a multiple of this */ #define VECTOR_BYTES 1024 /* bytes of interrupt vectors to save (all) */ #define VEC_TABLE_SEG 0 /* segment of vector table */ /* Interrupt vectors defined/reserved by processor. */ #define DIVIDE_VECTOR 0 /* divide error */ #define DEBUG_VECTOR 1 /* single step (trace) */ #define NMI_VECTOR 2 /* non-maskable interrupt */ #define BREAKPOINT_VECTOR 3 /* software breakpoint */ #define OVERFLOW_VECTOR 4 /* from INTO */ /* Fixed system call vector (the only software interrupt). */ #define SYS_VECTOR 32 /* system calls are made with int SYSVEC */ #define SYS386_VECTOR 33 /* except 386 system calls use this */ /* Suitable irq bases for hardware interrupts. Reprogram the 8259(s) from * the PC BIOS defaults since the BIOS doesn't respect all the processor's * reserved vectors (0 to 31). */ #define BIOS_IRQ0_VEC 0x08 /* base of IRQ0-7 vectors used by BIOS */ #define BIOS_IRQ8_VEC 0x70 /* base of IRQ8-15 vectors used by BIOS */ #define IRQ0_VECTOR 0x28 /* more or less arbitrary, but > SYS_VECTOR */ #define IRQ8_VECTOR 0x30 /* together for simplicity */ /* Hardware interrupt numbers. */ #define CLOCK_IRQ 0 #define KEYBOARD_IRQ 1 #define CASCADE_IRQ 2 /* cascade enable for 2nd AT controller */ #define ETHER_IRQ 3 /* ethernet interrupt vector */ #define SECONDARY_IRQ 3 /* RS232 interrupt vector for port 2 */ #define RS232_IRQ 4 /* RS232 interrupt vector for port 1 */ #define XT_WINI_IRQ 5 /* xt winchester */ #define FLOPPY_IRQ 6 /* floppy disk */ #define PRINTER_IRQ 7 #define AT_WINI_IRQ 14 /* at winchester */ #define PS_KEYB_IRQ 9 /* keyboard interrupt vector for PS/2 */ /* Hardware vector numbers. */ #define CLOCK_VECTOR ((CLOCK_IRQ & 0x07) + IRQ0_VECTOR) #define KEYBOARD_VECTOR ((KEYBOARD_IRQ & 0x07) + IRQ0_VECTOR) #define ETHER_VECTOR ((ETHER_IRQ & 0x07) + IRQ0_VECTOR) #define SECONDARY_VECTOR ((SECONDARY_IRQ & 0x07) + IRQ0_VECTOR) #define RS232_VECTOR ((RS232_IRQ & 0x07) + IRQ0_VECTOR) #define XT_WINI_VECTOR ((XT_WINI_IRQ & 0x07) + IRQ0_VECTOR) #define FLOPPY_VECTOR ((FLOPPY_IRQ & 0x07) + IRQ0_VECTOR) #define PRINTER_VECTOR ((PRINTER_IRQ & 0x07) + IRQ0_VECTOR) #define AT_WINI_VECTOR ((AT_WINI_IRQ & 0x07) + IRQ8_VECTOR) #define PS_KEYB_VECTOR ((PS_KEYB_IRQ & 0x07) + IRQ8_VECTOR) /* BIOS parameter vectors. */ #define WINI_0_PARM_VEC 0x41 #define WINI_1_PARM_VEC 0x46 /* 8259A interrupt controller ports. */ #define INT_CTL 0x20 /* I/O port for interrupt controller */ #define INT_CTLMASK 0x21 /* setting bits in this port disables ints */ #define INT2_CTL 0xA0 /* I/O port for second interrupt controller */ #define INT2_MASK 0xA1 /* setting bits in this port disables ints */ /* Magic numbers for interrupt controller. */ #define ENABLE 0x20 /* code used to re-enable after an interrupt */ /* Sizes of memory tables. */ #define NR_MEMS 4 /* number of chunks of memory */ /* Magic memory locations and sizes. */ #define COLOR_BASE 0xB8000L /* base of color video memory */ #define COLOR_SIZE 0x8000L /* maximum usable color video memory */ #define MONO_BASE 0xB0000L /* base of mono video memory */ #define MONO_SIZE 0x8000L /* maximum usable mono video memory */ /* What memory address the Etherplus card will use as the starting address of its 8K buffer. If conflicts arise, change EPLUS_BASE. */ #define EPLUS_BASE 0xC8000L #define EPLUS_SIZE 0x2000L /* Cursor shape is needed by debugger as well as console driver. */ #define CURSOR_SHAPE 15 /* block cursor for MDA/HGC/CGA/EGA/VGA... */ /* Miscellaneous ports. */ #define PCR 0x65 /* Planar Control Register */ #define PORT_B 0x61 /* I/O port for 8255 port B (kbd, beeper...) */ #define TIMER0 0x40 /* I/O port for timer channel 0 */ #define TIMER2 0x42 /* I/O port for timer channel 2 */ #define TIMER_MODE 0x43 /* I/O port for timer mode control */ #endif /* (CHIP == INTEL) */ #if (CHIP == M68000) #define K_STACK_BYTES 1024 /* how many bytes for the kernel stack */ /* p_reg contains: d0-d7, a0-a6, in that order. */ #define NR_REGS 15 /* number of general regs in each proc slot */ #define TRACEBIT 0x8000 /* or this with psw in proc[] for tracing */ #define SETBITS(rp, new) /* permits only certain bits to be set */ \ ((rp)->p_reg.psw = (rp)->p_reg.psw & ~0xFF | (new) & 0xFF) #define MEM_BYTES 0x1000000 /* memory size for /dev/mem */ #define ALIGNMENT 4 /* align large items to a multiple of this */ /* 2 would do for an 68000, but 4 is nicer for 68020/68030 */ #ifdef ACK #define FSTRUCOPY #endif #endif /* (CHIP == M68000) */ /* The following items pertain to the scheduling queues. */ #define TASK_Q 0 /* ready tasks are scheduled via queue 0 */ #define SERVER_Q 1 /* ready servers are scheduled via queue 1 */ #define USER_Q 2 /* ready users are scheduled via queue 2 */ #if (MACHINE == ATARI) #define SHADOW_Q 3 /* runnable, but shadowed processes */ #define NQ 4 /* # of scheduling queues */ #else #define NQ 3 /* # of scheduling queues */ #endif #define printf printk /* the kernel really uses printk, not printf */