55 lines
1.9 KiB
C
Executable file
55 lines
1.9 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) (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
|
|
|
|
/* 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 0x100 /* 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) */
|
|
|