728f0f0c49
* Userspace change to use the new kernel calls - _taskcall(SYSTASK...) changed to _kernel_call(...) - int 32 reused for the kernel calls - _do_kernel_call() to make the trap to kernel - kernel_call() to make the actuall kernel call from C using _do_kernel_call() - unlike ipc call the kernel call always succeeds as kernel is always available, however, kernel may return an error * Kernel side implementation of kernel calls - the SYSTEm task does not run, only the proc table entry is preserved - every data_copy(SYSTEM is no data_copy(KERNEL - "locking" is an empty operation now as everything runs in kernel - sys_task() is replaced by kernel_call() which copies the message into kernel, dispatches the call to its handler and finishes by either copying the results back to userspace (if need be) or by suspending the process because of VM - suspended processes are later made runnable once the memory issue is resolved, picked up by the scheduler and only at this time the call is resumed (in fact restarted) which does not need to copy the message from userspace as the message is already saved in the process structure. - no ned for the vmrestart queue, the scheduler will restart the system calls - no special case in do_vmctl(), all requests remove the RTS_VMREQUEST flag
52 lines
1.3 KiB
C
52 lines
1.3 KiB
C
/* General macros and constants used by the kernel. */
|
|
#ifndef CONST_H
|
|
#define CONST_H
|
|
|
|
#include <minix/config.h>
|
|
#include <minix/bitmap.h>
|
|
|
|
#include "config.h"
|
|
#include "debug.h"
|
|
|
|
/* 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)
|
|
|
|
/* Constants used in virtual_copy(). Values must be 0 and 1, respectively. */
|
|
#define _SRC_ 0
|
|
#define _DST_ 1
|
|
|
|
#define get_sys_bit(map,bit) \
|
|
( MAP_CHUNK(map.chunk,bit) & (1 << CHUNK_OFFSET(bit) )
|
|
#define get_sys_bits(map,bit) \
|
|
( MAP_CHUNK(map.chunk,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 reallock
|
|
|
|
#define realunlock
|
|
|
|
/* Disable/ enable hardware interrupts. The parameters of lock() and unlock()
|
|
* are used when debugging is enabled. See debug.h for more information.
|
|
*/
|
|
#define lock reallock
|
|
#define unlock realunlock
|
|
|
|
#ifdef CONFIG_IDLE_TSC
|
|
#define IDLE_STOP if(idle_active) { read_tsc_64(&idle_stop); idle_active = 0; }
|
|
#else
|
|
#define IDLE_STOP
|
|
#endif
|
|
|
|
/* args to intr_init() */
|
|
#define INTS_ORIG 0 /* restore interrupts */
|
|
#define INTS_MINIX 1 /* initialize interrupts for minix */
|
|
|
|
/* for kputc() */
|
|
#define END_OF_KMESS 0
|
|
|
|
#endif /* CONST_H */
|