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/**
** @file defs.h
**
** @author Warren R. Carithers
**
** @brief Common definitions.
**
** This header file defines things which are neede by all
** parts of the system (OS and user levels).
**
** Things which are kernel-specific go in the kdefs.h file;
** things which are user-specific go in the udefs.h file.
** The correct one of these will be automatically included
** at the end of this file.
*/
#ifndef DEFS_H_
#define DEFS_H_
/*
** General (C and/or assembly) definitions
**
** This section of the header file contains definitions that can be
** used in either C or assembly-language source code.
*/
// NULL pointer value
//
// we define this the traditional way so that
// it's usable from both C and assembly
#define NULL 0
// predefined i/o channels
#define CHAN_CIO 0
#define CHAN_SIO 1
// maximum allowable number of command-line arguments
#define MAX_ARGS 10
// sizes of various things
#define NUM_1KB 0x00000400 // 2^10
#define NUM_4KB 0x00001000 // 2^12
#define NUM_1MB 0x00100000 // 2^20
#define NUM_4MB 0x00400000 // 2^22
#define NUM_1GB 0x40000000 // 2^30
#define NUM_2GB 0x80000000 // 2^31
#define NUM_3GB 0xc0000000
#ifndef ASM_SRC
/*
** Start of C-only definitions
**
** Anything that should not be visible to something other than
** the C compiler should be put here.
*/
/*
** System error codes
**
** These can be returned to both system functions
** and to user system calls.
*/
// success!
#define SUCCESS (0)
# define E_SUCCESS SUCCESS
// generic "something went wrong"
#define E_FAILURE (-1)
// specific failure reasons
#define E_BAD_PARAM (-2)
#define E_BAD_CHAN (-3)
#define E_NO_CHILDREN (-4)
#define E_NO_MEMORY (-5)
#define E_NOT_FOUND (-6)
#define E_NO_PROCS (-7)
/*
** These error codes are internal to the OS.
*/
#define E_EMPTY_QUEUE (-100)
#define E_NO_PCBS (-101)
#define E_NO_PTE (-102)
#define E_LOAD_LIMIT (-103)
// exit status values
#define EXIT_SUCCESS (0)
#define EXIT_FAILURE (-1)
#define EXIT_KILLED (-101)
#define EXIT_BAD_SYSCALL (-102)
/*
** Process priority values
*/
enum priority_e {
PRIO_HIGH, PRIO_STD, PRIO_LOW, PRIO_DEFERRED
// sentinel
, N_PRIOS
};
// halves of various data sizes
#define UI16_UPPER 0xff00
#define UI16_LOWER 0x00ff
#define UI32_UPPER 0xffff0000
#define UI32_LOWER 0x0000ffff
#define UI64_UPPER 0xffffffff00000000LL
#define UI64_LOWER 0x00000000ffffffffLL
// Simple conversion pseudo-functions usable by everyone
// convert seconds to ms
#define SEC_TO_MS(n) ((n) * 1000)
#endif /* !ASM_SRC */
/*
** Level-specific definitions
*/
#ifdef KERNEL_SRC
#include <kdefs.h>
#else
#include <udefs.h>
#endif /* KERNEL_SRC */
#endif
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