minix/kernel/const.h
Jorrit Herder c2be104821 Improved NOTIFY system: fixed a minor error, ignore pending notifications
on SENDREC system calls. To be done: resource (buffer pool) management;
make it structurally impossible to run out of buffers.
2005-05-27 12:44:14 +00:00

73 lines
2.6 KiB
C
Executable file

/* General constants used by the kernel. */
#include <ibm/interrupt.h> /* interrupt numbers and hardware vectors */
#include <ibm/ports.h> /* port addresses and magic numbers */
#include <ibm/bios.h> /* BIOS addresses, sizes and magic numbers */
#if (CHIP == INTEL)
/* To translate an address in kernel space to a physical address. This is
* the same as umap_local(proc_ptr, D, vir, sizeof(*vir)), but less costly.
*/
#define vir2phys(vir) (kinfo.data_base + (vir_bytes) (vir))
/* Constants used in virtual_copy(). Values must be 0 and 1, respectively! */
#define _SRC_ 0
#define _DST_ 1
/* Translate a pointer to a field in a structure to a pointer to the structure
* itself. So it translates '&struct_ptr->field' back to 'struct_ptr'.
*/
#define structof(type, field, ptr) \
((type *) (((char *) (ptr)) - offsetof(type, field)))
/* How many bytes for the kernel stack. Space allocated in mpx.s. */
#define K_STACK_BYTES 1024
/* How many bytes for (port,value)-pairs vector to copy in. */
#define VDEVIO_BUF_SIZE 128
/* How many elements in vector of virtual copy requests. */
#define VCOPY_VEC_SIZE 16
/* How many IRQ hooks are there in total. */
#define NR_IRQ_HOOKS 16
/* How many buffers for notification messages should there be? */
#define NR_NOTIFY_BUFS 32
/* Constants and macros for bit map manipulation. */
#define BITCHUNK_BITS (sizeof(bitchunk_t) * CHAR_BIT)
#define BITMAP_CHUNKS(nr_bits) (((nr_bits)+BITCHUNK_BITS-1)/BITCHUNK_BITS)
#define MAP_CHUNK(map,bit) (map)[((bit)/BITCHUNK_BITS)]
#define CHUNK_OFFSET(bit) ((bit)%BITCHUNK_BITS))
#define GET_BIT(map,bit) ( MAP_CHUNK(map,bit) & (1 << CHUNK_OFFSET(bit) )
#define SET_BIT(map,bit) ( MAP_CHUNK(map,bit) |= (1 << CHUNK_OFFSET(bit) )
#define UNSET_BIT(map,bit) ( MAP_CHUNK(map,bit) &= ~(1 << CHUNK_OFFSET(bit) )
/* Program stack words and masks. */
#define INIT_PSW 0x0200 /* initial psw */
#define INIT_TASK_PSW 0x1200 /* initial psw for tasks (with IOPL 1) */
#define TRACEBIT 0x0100 /* OR this with psw in proc[] for tracing */
#define SETPSW(rp, new) /* permits only certain bits to be set */ \
((rp)->p_reg.psw = (rp)->p_reg.psw & ~0xCD5 | (new) & 0xCD5)
#define IF_MASK 0x00000200
#define IOPL_MASK 0x003000
/* Disable/Enable hardware interrupts. */
#define lock() intr_disable()
#define unlock() intr_enable()
/* Sizes of memory tables. The boot monitor distinguishes three memory areas,
* namely low mem below 1M, 1M-16M, and mem after 16M. More chunks are needed
* for DOS MINIX.
*/
#define NR_MEMS 8 /* number of chunks of memory */
#endif /* (CHIP == INTEL) */
#if (CHIP == M68000)
/* M68000 specific constants go here. */
#endif /* (CHIP == M68000) */