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minix/kernel/const.h

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Reorganized system call library; uses separate file per call now. New configuration header file to include/ exclude functionality. Extracted privileged features from struct proc and create new struct priv. Renamed various system calls for readability.
2005-07-14 17:12:12 +02:00
/* General macros and constants used by the kernel. */
#ifndef CONST_H
#define CONST_H
Initial revision
2005-04-21 16:53:53 +02:00
#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 */
Added function read_cpu_flags() that returns current cpu flags as a 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.
2005-06-20 16:53:13 +02:00
#include <ibm/cpu.h> /* BIOS addresses, sizes and magic numbers */
Added args to lock() and unlock() to tell them apart, for use when lock timing is enabled in minix/config.h. Added phys_zero() routine to klib386.s that zeroes a range of memory, and added corresponding system call.
2005-06-01 11:37:52 +02:00
#include <minix/config.h>
Move bitmap manipulation macros to <minix/bitmap.h>
2006-06-20 11:50:26 +02:00
#include <minix/bitmap.h>
Reorganized system call library; uses separate file per call now. New configuration header file to include/ exclude functionality. Extracted privileged features from struct proc and create new struct priv. Renamed various system calls for readability.
2005-07-14 17:12:12 +02:00
#include "config.h"
Initial revision
2005-04-21 16:53:53 +02:00
/* 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.
*/
*** empty log message ***
2005-04-29 17:36:43 +02:00
#define vir2phys(vir) (kinfo.data_base + (vir_bytes) (vir))
Initial revision
2005-04-21 16:53:53 +02:00
Check if kernel calls is allowed (from process' call mask) added. Not yet enforced. If a call is denied, this will be kprinted. Please report any such errors, so that I can adjust the mask before returning errors instead of warnings. Wrote CMOS driver. All CMOS code from FS has been removed. Currently the driver only supports get time calls. Set time is left out as an exercise for the book readers ... startup scripts were updated because the CMOS driver is needed early on. (IS got same treatment.) Don't forget to run MAKEDEV cmos in /dev/, otherwise the driver cannot be loaded.
2005-08-04 21:23:03 +02:00
/* Map a process number to a privilege structure id. */
Single boot driver loaded, while multiple can be included in the boot image. The user needs to set label=... to choose the driver of his or her choice. This driver will be mapped onto the controller that is set in controller=... Minor cleanup of kernel source code (boot image table now is static).
2005-08-03 18:06:35 +02:00
#define s_nr_to_id(n) (NR_TASKS + (n) + 1)
Initial revision
2005-04-21 16:53:53 +02:00
/* Translate a pointer to a field in a structure to a pointer to the structure
Reorganized system call library; uses separate file per call now. New configuration header file to include/ exclude functionality. Extracted privileged features from struct proc and create new struct priv. Renamed various system calls for readability.
2005-07-14 17:12:12 +02:00
* itself. So it translates '&struct_ptr->field' back to 'struct_ptr'.
Initial revision
2005-04-21 16:53:53 +02:00
*/
#define structof(type, field, ptr) \
((type *) (((char *) (ptr)) - offsetof(type, field)))
'proc number' is process slot, 'endpoint' are generation-aware process instance numbers, encoded and decoded using macros in <minix/endpoint.h>. proc number -> endpoint migration . proc_nr in the interrupt hook is now an endpoint, proc_nr_e. . m_source for messages and notifies is now an endpoint, instead of proc number. . isokendpt() converts an endpoint to a process number, returns success (but fails if the process number is out of range, the process slot is not a living process, or the given endpoint number does not match the endpoint number in the process slot, indicating an old process). . okendpt() is the same as isokendpt(), but panic()s if the conversion fails. This is mainly used for decoding message.m_source endpoints, and other endpoint numbers in kernel data structures, which should always be correct. . if DEBUG_ENABLE_IPC_WARNINGS is enabled, isokendpt() and okendpt() get passed the __FILE__ and __LINE__ of the calling lines, and print messages about what is wrong with the endpoint number (out of range proc, empty proc, or inconsistent endpoint number), with the caller, making finding where the conversion failed easy without having to include code for every call to print where things went wrong. Sometimes this is harmless (wrong arg to a kernel call), sometimes it's a fatal internal inconsistency (bogus m_source). . some process table fields have been appended an _e to indicate it's become and endpoint. . process endpoint is stored in p_endpoint, without generation number. it turns out the kernel never needs the generation number, except when fork()ing, so it's decoded then. . kernel calls all take endpoints as arguments, not proc numbers. the one exception is sys_fork(), which needs to know in which slot to put the child.
2006-03-03 11:00:02 +01:00
/* Translate an endpoint number to a process number, return success. */
#define isokendpt(e,p) isokendpt_d((e),(p),0)
#define okendpt(e,p) isokendpt_d((e),(p),1)
Reorganized system call library; uses separate file per call now. New configuration header file to include/ exclude functionality. Extracted privileged features from struct proc and create new struct priv. Renamed various system calls for readability.
2005-07-14 17:12:12 +02:00
/* Constants used in virtual_copy(). Values must be 0 and 1, respectively. */
#define _SRC_ 0
#define _DST_ 1
Various updates. * Removed some variants of the SYS_GETINFO calls from the kernel; replaced them with new PM and utils libary functionality. Fixed bugs in utils library that used old get_kenv() variant. * Implemented a buffer in the kernel to gather random data. Memory driver periodically checks this for /dev/random. A better random algorithm can now be implemented in the driver. Removed SYS_RANDOM; the SYS_GETINFO call is used instead. * Remove SYS_KMALLOC from the kernel. Memory allocation can now be done at the process manager with new 'other' library functions.
2005-06-03 15:55:06 +02:00
Random number generator
2005-07-18 17:40:24 +02:00
/* Number of random sources */
#define RANDOM_SOURCES 16
Reorganized system call library; uses separate file per call now. New configuration header file to include/ exclude functionality. Extracted privileged features from struct proc and create new struct priv. Renamed various system calls for readability.
2005-07-14 17:12:12 +02:00
#define get_sys_bit(map,bit) \
( MAP_CHUNK(map.chunk,bit) & (1 << CHUNK_OFFSET(bit) )
#define set_sys_bit(map,bit) \
( MAP_CHUNK(map.chunk,bit) |= (1 << CHUNK_OFFSET(bit) )
#define unset_sys_bit(map,bit) \
( MAP_CHUNK(map.chunk,bit) &= ~(1 << CHUNK_OFFSET(bit) )
#define NR_SYS_CHUNKS BITMAP_CHUNKS(NR_SYS_PROCS)
Replaced flagalrm() timers with another technique to check for timeouts. This allowed removing the p_flagarlm timer from the kernel's process table. Furthermore, I merged p_syncalrm and p_signalrm into p_alarm_timer to save even more space. Note that processes can no longer have both a signal and synchronous alarm timer outstanding as of now.
2005-05-31 16:43:04 +02:00
#if (CHIP == INTEL)
Initial revision
2005-04-21 16:53:53 +02:00
/* Program stack words and masks. */
#define INIT_PSW 0x0200 /* initial psw */
#define INIT_TASK_PSW 0x1200 /* initial psw for tasks (with IOPL 1) */
Intermediate update---please await next commit.
2005-05-19 11:36:44 +02:00
#define TRACEBIT 0x0100 /* OR this with psw in proc[] for tracing */
Kernel changes: - reinstalled priority changing, now in sched() and unready() - reinstalled check on message buffer in sys_call() - reinstalled check in send masks in sys_call() - changed do_fork() to get new privilege structure for SYS_PROCs - removed some processes from boot image---will be dynamically started later
2005-07-26 14:48:34 +02:00
#define SETPSW(rp, new) /* permits only certain bits to be set */ \
Initial revision
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((rp)->p_reg.psw = (rp)->p_reg.psw & ~0xCD5 | (new) & 0xCD5)
#define IF_MASK 0x00000200
#define IOPL_MASK 0x003000
added reenter check to lock_dequeue() to avoid unlocking of interrupts via cause_sig() during an exception. moved lock check configuration to <minix/sys_config.h> instead of kernel/config.h, because the 'relocking' field in kinfo depends on it. other prettification: common locking macro, whether lock timing is on or not.
2006-02-10 17:53:51 +01:00
#if DEBUG_LOCK_CHECK
#define reallock(c, v) { if (!(read_cpu_flags() & X86_FLAG_I)) { kinfo.relocking++; } else { intr_disable(); } }
#else
#define reallock(c, v) intr_disable()
#endif
#define realunlock(c) intr_enable()
Reorganized system call library; uses separate file per call now. New configuration header file to include/ exclude functionality. Extracted privileged features from struct proc and create new struct priv. Renamed various system calls for readability.
2005-07-14 17:12:12 +02:00
/* Disable/ enable hardware interrupts. The parameters of lock() and unlock()
* are used when debugging is enabled. See debug.h for more information.
*/
added reenter check to lock_dequeue() to avoid unlocking of interrupts via cause_sig() during an exception. moved lock check configuration to <minix/sys_config.h> instead of kernel/config.h, because the 'relocking' field in kinfo depends on it. other prettification: common locking macro, whether lock timing is on or not.
2006-02-10 17:53:51 +01:00
#define lock(c, v) reallock(c, v)
#define unlock(c) realunlock(c)
Initial revision
2005-04-21 16:53:53 +02:00
/* 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.
*/
Reorganized system call library; uses separate file per call now. New configuration header file to include/ exclude functionality. Extracted privileged features from struct proc and create new struct priv. Renamed various system calls for readability.
2005-07-14 17:12:12 +02:00
#define NR_MEMS 8
Initial revision
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#endif /* (CHIP == INTEL) */
#if (CHIP == M68000)
/* M68000 specific constants go here. */
#endif /* (CHIP == M68000) */
Reorganized system call library; uses separate file per call now. New configuration header file to include/ exclude functionality. Extracted privileged features from struct proc and create new struct priv. Renamed various system calls for readability.
2005-07-14 17:12:12 +02:00
#endif /* CONST_H */
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