3eeff022fb
long. This is used to check for interrupts being disabled at the time of a lock() call, if enabled in config.h. The number of times this happens is then counted in the kinfo structure. These events (recursive lockings) lead to nasty race conditions.
102 lines
3.5 KiB
C
Executable file
102 lines
3.5 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 */
|
|
#include <ibm/cpu.h> /* BIOS addresses, sizes and magic numbers */
|
|
#include <minix/config.h>
|
|
|
|
/* 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 long should the process names be in the kernel? */
|
|
#define P_NAME_LEN 8
|
|
|
|
/* How many bytes should the circular buffer for kernel diagnostics. */
|
|
#define KMESS_BUF_SIZE 256
|
|
|
|
/* Maximum size in bytes for (port,value)-pairs vector to copy in. */
|
|
#define VDEVIO_BUF_SIZE 64
|
|
|
|
/* 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
|
|
|
|
/* Buffer to gather randomness. How many entries before wrapping? */
|
|
#define RANDOM_ELEMENTS 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) )
|
|
|
|
|
|
#if (CHIP == INTEL)
|
|
|
|
/* 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
|
|
|
|
#if ENABLE_LOCK_TIMING
|
|
#define locktimestart(c, v) timer_start(c, v)
|
|
#define locktimeend(c) timer_end(c)
|
|
#else
|
|
#define locktimestart(c, v)
|
|
#define locktimeend(c)
|
|
#endif
|
|
|
|
#if ENABLE_K_LOCKCHECK
|
|
#define lockcheck if(!(read_cpu_flags() & X86_FLAG_I)) kinfo.relocking++;
|
|
#else
|
|
#define lockcheck
|
|
#endif
|
|
|
|
/* Disable/Enable hardware interrupts. */
|
|
#define lock(c, v) do { lockcheck; intr_disable(); locktimestart(c, v); } while(0)
|
|
#define unlock(c) do { locktimeend(c); intr_enable(); } while(0)
|
|
|
|
/* 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) */
|
|
|
|
#if ENABLE_INT_TIMING
|
|
#define INT_TIMING_BITS 12
|
|
#define INT_TIMING_ELEMENTS (1L << 12)
|
|
#endif
|