minix/include/minix/const.h
Ben Gras 5acaa0814f kernel, ramdisk: some boot unification
To use the new SD building script, Linux has to be configured with
loop.max_part=15 on the command line (or set at module load time)
to make the loopback device see the partitions.

This commit removes a lot of differences between the ARM and x86
boot ramdisk and rc scripts. It changes the ARM build from running
from ramdisk to requiring a full filesystem on the SD image and
booting into it.

	. ramdisk: remove some arm-only utilities only used for running
	  from the shell
	. remove ARM-only rc.arm, proto.arm.small, ttys and mylogin.sh
	  boot-time ramdisk files
	. change kernel to add "arch" variable so userland knows what
	  we're running on from sysenv
	. make ARM use the regular ramdisk rc file, changed to distinguish
	  i386-only and ARM-only drivers; requires rootdevname to be set
	. change /etc/rc and /usr/etc/rc to start i386-only drivers only on
	  i386 systems
	. change the kernel/arm to have a special case for the memory
	  driver to load it higher so it can be bigger
	. add uEnv.txt, cmdline.txt and a for now highly linux-dependent
	  SD preparation script arm_sdimage.sh to the git repository in
	  releasetools/

Change-Id: I68910ba4e96ee80f7a12b65e48b5d39b43ca6397
2013-03-07 14:29:27 +00:00

182 lines
7.2 KiB
C

#ifndef _MINIX_CONST_H
#define _MINIX_CONST_H
#include <machine/archconst.h>
/* The UNUSED annotation tells the compiler or lint not to complain
* about an unused variable or function parameter.
*
* A number of different annotations are used, depending on the
* compiler or checker that is looking at the code.
*
* Note that some variants rename the parameter, so if you use
* the parameter after all, you'll get a complaint about a missing
* variable.
*
* You use it like this:
*
* void foo(int UNUSED(x)){}
*/
#ifndef UNUSED
#if defined _lint
# define UNUSED(v) /*lint -e(715,818)*/ v
#elif defined(__GNUC__)
# define UNUSED(v) UNUSED_ ## v __attribute((unused))
#elif defined __LCLINT__
# define UNUSED(v) /*@unused@*/ v
#else
# define UNUSED(v) _UNUSED_ ## v
#endif
#endif
#define EXTERN extern /* used in *.h files */
#define TRUE 1 /* used for turning integers into Booleans */
#define FALSE 0 /* used for turning integers into Booleans */
#define SUPER_USER ((uid_t) 0) /* uid_t of superuser */
#include <sys/null.h> /* NULL Pointer */
#define SCPVEC_NR 64 /* max # of entries in a SYS_VSAFECOPY request */
#define MAPVEC_NR 64 /* max # of entries in a SYS_VUMAP request */
#define NR_IOREQS 64 /* maximum number of entries in an iorequest */
#define VUA_READ 0x01 /* for SYS_VUMAP: read access */
#define VUA_WRITE 0x02 /* for SYS_VUMAP: write access */
/* Message passing constants. */
#define MESS_SIZE (sizeof(message)) /* might need usizeof from FS here */
/* Memory related constants. */
#define SEGMENT_TYPE 0xFF00 /* bit mask to get segment type */
#define SEGMENT_INDEX 0x00FF /* bit mask to get segment index */
#define D_OBSOLETE 1 /* proc[i].mem_map[D] is for data */
#define PHYS_SEG 0x0400 /* flag indicating entire physical memory */
#define LOCAL_VM_SEG 0x1000 /* same as LOCAL_SEG, but with vm lookup */
#define MEM_GRANT 3
#define VIR_ADDR 1
#define VM_D (LOCAL_VM_SEG | VIR_ADDR)
#define VM_GRANT (LOCAL_VM_SEG | MEM_GRANT)
/* Labels used to disable code sections for different reasons. */
#define DEAD_CODE 0 /* unused code in normal configuration */
#define FUTURE_CODE 0 /* new code to be activated + tested later */
#define TEMP_CODE 1 /* active code to be removed later */
/* Miscellaneous */
#define BYTE 0377 /* mask for 8 bits */
#define READING 0 /* copy data to user */
#define WRITING 1 /* copy data from user */
#define PEEKING 2 /* retrieve FS data without copying */
#define HAVE_SCATTERED_IO 1 /* scattered I/O is now standard */
/* Memory is allocated in clicks. */
#if defined(__i386__) || defined(__arm__)
#define CLICK_SIZE 4096 /* unit in which memory is allocated */
#define CLICK_SHIFT 12 /* log2 of CLICK_SIZE */
#else
#error Unsupported arch
#endif
/* Click alignment macros. */
#define CLICK_FLOOR(n) (((vir_bytes)(n) / CLICK_SIZE) * CLICK_SIZE)
#define CLICK_CEIL(n) CLICK_FLOOR((vir_bytes)(n) + CLICK_SIZE-1)
/* 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 16
/* Click to byte conversions (and vice versa). */
#define HCLICK_SHIFT 4 /* log2 of HCLICK_SIZE */
#define HCLICK_SIZE 16 /* hardware segment conversion magic */
#if CLICK_SIZE >= HCLICK_SIZE
#define click_to_hclick(n) ((n) << (CLICK_SHIFT - HCLICK_SHIFT))
#else
#define click_to_hclick(n) ((n) >> (HCLICK_SHIFT - CLICK_SHIFT))
#endif
#define hclick_to_physb(n) ((phys_bytes) (n) << HCLICK_SHIFT)
#define physb_to_hclick(n) ((n) >> HCLICK_SHIFT)
#define CLICK2ABS(v) ((v) << CLICK_SHIFT)
#define ABS2CLICK(a) ((a) >> CLICK_SHIFT)
#define ABS -999 /* this process means absolute memory */
/* Flag bits for i_mode in the inode. */
#define I_TYPE 0170000 /* this field gives inode type */
#define I_UNIX_SOCKET 0140000 /* unix domain socket */
#define I_SYMBOLIC_LINK 0120000 /* file is a symbolic link */
#define I_REGULAR 0100000 /* regular file, not dir or special */
#define I_BLOCK_SPECIAL 0060000 /* block special file */
#define I_DIRECTORY 0040000 /* file is a directory */
#define I_CHAR_SPECIAL 0020000 /* character special file */
#define I_NAMED_PIPE 0010000 /* named pipe (FIFO) */
#define I_SET_UID_BIT 0004000 /* set effective uid_t on exec */
#define I_SET_GID_BIT 0002000 /* set effective gid_t on exec */
#define I_SET_STCKY_BIT 0001000 /* sticky bit */
#define ALL_MODES 0007777 /* all bits for user, group and others */
#define RWX_MODES 0000777 /* mode bits for RWX only */
#define R_BIT 0000004 /* Rwx protection bit */
#define W_BIT 0000002 /* rWx protection bit */
#define X_BIT 0000001 /* rwX protection bit */
#define I_NOT_ALLOC 0000000 /* this inode is free */
/* Some limits. */
#define MAX_INODE_NR ((ino_t) 037777777777) /* largest inode number */
#define MAX_FILE_POS ((off_t) 0x7FFFFFFF) /* largest legal file offset */
#define UMAX_FILE_POS ((unsigned) 0x7FFFFFFF) /* largest legal file offset */
#define MAX_SYM_LOOPS 8 /* how many symbolic links are recursed */
#define NO_BLOCK ((block_t) 0) /* absence of a block number */
#define NO_ENTRY ((ino_t) 0) /* absence of a dir entry */
#define NO_ZONE ((zone_t) 0) /* absence of a zone number */
#define NO_DEV ((dev_t) 0) /* absence of a device numb */
#define NO_LINK ((nlink_t) 0) /* absence of incoming links */
#define INVAL_UID ((uid_t) -1) /* invalid uid value */
#define INVAL_GID ((gid_t) -1) /* invalid gid value */
#define SERVARNAME "cttyline"
#define ARCHVARNAME "arch"
#define SERBAUDVARNAME "cttybaud"
/* Bits for s_flags in the privilege structure. */
#define PREEMPTIBLE 0x002 /* kernel tasks are not preemptible */
#define BILLABLE 0x004 /* some processes are not billable */
#define DYN_PRIV_ID 0x008 /* privilege id assigned dynamically */
#define SYS_PROC 0x010 /* system processes have own priv structure */
#define CHECK_IO_PORT 0x020 /* check if I/O request is allowed */
#define CHECK_IRQ 0x040 /* check if IRQ can be used */
#define CHECK_MEM 0x080 /* check if (VM) mem map request is allowed */
#define ROOT_SYS_PROC 0x100 /* this is a root system process instance */
#define VM_SYS_PROC 0x200 /* this is a vm system process instance */
#define LU_SYS_PROC 0x400 /* this is a live updated sys proc instance */
#define RST_SYS_PROC 0x800 /* this is a restarted sys proc instance */
/* Bits for device driver flags managed by RS and VFS. */
#define DRV_FORCED 0x01 /* driver is mapped even if not alive yet */
/* Values for the "verbose" boot monitor variable */
#define VERBOSEBOOT_QUIET 0
#define VERBOSEBOOT_BASIC 1
#define VERBOSEBOOT_EXTRA 2
#define VERBOSEBOOT_MAX 3
#define VERBOSEBOOTVARNAME "verbose"
/* magic value to put in struct proc entries for sanity checks. */
#define PMAGIC 0xC0FFEE1
/* MINIX_KERNFLAGS flags */
#define MKF_I386_INTEL_SYSENTER (1L << 0) /* SYSENTER available and supported */
#define MKF_I386_AMD_SYSCALL (1L << 1) /* SYSCALL available and supported */
#endif /* _MINIX_CONST_H */