| 1 | /* General macros and constants used by the kernel. */
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| 2 | #ifndef CONST_H
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| 3 | #define CONST_H
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| 4 |
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| 5 | #include <ibm/interrupt.h> /* interrupt numbers and hardware vectors */
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| 6 | #include <ibm/ports.h> /* port addresses and magic numbers */
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| 7 | #include <ibm/bios.h> /* BIOS addresses, sizes and magic numbers */
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| 8 | #include <ibm/cpu.h> /* BIOS addresses, sizes and magic numbers */
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| 9 | #include <minix/config.h>
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| 10 | #include "config.h"
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| 11 |
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| 12 | /* To translate an address in kernel space to a physical address. This is
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| 13 | * the same as umap_local(proc_ptr, D, vir, sizeof(*vir)), but less costly.
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| 14 | */
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| 15 | #define vir2phys(vir) (kinfo.data_base + (vir_bytes) (vir))
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| 16 |
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| 17 | /* Map a process number to a privilege structure id. */
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| 18 | #define s_nr_to_id(n) (NR_TASKS + (n) + 1)
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| 19 |
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| 20 | /* Translate a pointer to a field in a structure to a pointer to the structure
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| 21 | * itself. So it translates '&struct_ptr->field' back to 'struct_ptr'.
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| 22 | */
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| 23 | #define structof(type, field, ptr) \
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| 24 | ((type *) (((char *) (ptr)) - offsetof(type, field)))
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| 25 |
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| 26 | /* Constants used in virtual_copy(). Values must be 0 and 1, respectively. */
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| 27 | #define _SRC_ 0
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| 28 | #define _DST_ 1
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| 29 |
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| 30 | /* Number of random sources */
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| 31 | #define RANDOM_SOURCES 16
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| 32 |
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| 33 | /* Constants and macros for bit map manipulation. */
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| 34 | #define BITCHUNK_BITS (sizeof(bitchunk_t) * CHAR_BIT)
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| 35 | #define BITMAP_CHUNKS(nr_bits) (((nr_bits)+BITCHUNK_BITS-1)/BITCHUNK_BITS)
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| 36 | #define MAP_CHUNK(map,bit) (map)[((bit)/BITCHUNK_BITS)]
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| 37 | #define CHUNK_OFFSET(bit) ((bit)%BITCHUNK_BITS))
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| 38 | #define GET_BIT(map,bit) ( MAP_CHUNK(map,bit) & (1 << CHUNK_OFFSET(bit) )
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| 39 | #define SET_BIT(map,bit) ( MAP_CHUNK(map,bit) |= (1 << CHUNK_OFFSET(bit) )
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| 40 | #define UNSET_BIT(map,bit) ( MAP_CHUNK(map,bit) &= ~(1 << CHUNK_OFFSET(bit) )
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| 41 |
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| 42 | #define get_sys_bit(map,bit) \
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| 43 | ( MAP_CHUNK(map.chunk,bit) & (1 << CHUNK_OFFSET(bit) )
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| 44 | #define set_sys_bit(map,bit) \
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| 45 | ( MAP_CHUNK(map.chunk,bit) |= (1 << CHUNK_OFFSET(bit) )
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| 46 | #define unset_sys_bit(map,bit) \
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| 47 | ( MAP_CHUNK(map.chunk,bit) &= ~(1 << CHUNK_OFFSET(bit) )
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| 48 | #define NR_SYS_CHUNKS BITMAP_CHUNKS(NR_SYS_PROCS)
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| 49 |
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| 50 | /* Program stack words and masks. */
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| 51 | #define INIT_PSW 0x0200 /* initial psw */
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| 52 | #define INIT_TASK_PSW 0x1200 /* initial psw for tasks (with IOPL 1) */
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| 53 | #define TRACEBIT 0x0100 /* OR this with psw in proc[] for tracing */
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| 54 | #define SETPSW(rp, new) /* permits only certain bits to be set */ \
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| 55 | ((rp)->p_reg.psw = (rp)->p_reg.psw & ~0xCD5 | (new) & 0xCD5)
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| 56 | #define IF_MASK 0x00000200
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| 57 | #define IOPL_MASK 0x003000
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| 58 |
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| 59 | /* Disable/ enable hardware interrupts. The parameters of lock() and unlock()
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| 60 | * are used when debugging is enabled. See debug.h for more information.
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| 61 | */
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| 62 | #define lock(c, v) intr_disable();
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| 63 | #define unlock(c) intr_enable();
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| 64 |
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| 65 | /* Sizes of memory tables. The boot monitor distinguishes three memory areas,
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| 66 | * namely low mem below 1M, 1M-16M, and mem after 16M. More chunks are needed
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| 67 | * for DOS MINIX.
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| 68 | */
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| 69 | #define NR_MEMS 8
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| 70 |
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| 71 | #endif /* CONST_H */
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| 72 |
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| 73 |
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| 74 |
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| 75 |
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| 76 |
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