minix/kernel/type.h
Jorrit Herder a01645b788 New scheduling code in kernel. Work in progress.
Round-robin within one priority queue works fine.
Ageing algorithm to be done.
2005-08-19 16:43:28 +00:00

110 lines
3.8 KiB
C
Executable file

#ifndef TYPE_H
#define TYPE_H
typedef _PROTOTYPE( void task_t, (void) );
/* Process table and system property related types. */
typedef int proc_nr_t; /* process table entry number */
typedef short sys_id_t; /* system process index */
typedef struct { /* bitmap for system indexes */
bitchunk_t chunk[BITMAP_CHUNKS(NR_SYS_PROCS)];
} sys_map_t;
struct boot_image {
proc_nr_t proc_nr; /* process number to use */
task_t *initial_pc; /* start function for tasks */
int flags; /* process flags */
unsigned char quantum; /* quantum (tick count) */
int priority; /* scheduling priority */
int stksize; /* stack size for tasks */
short trap_mask; /* allowed system call traps */
bitchunk_t ipc_to; /* send mask protection */
long call_mask; /* system call protection */
char proc_name[P_NAME_LEN]; /* name in process table */
};
struct memory {
phys_clicks base; /* start address of chunk */
phys_clicks size; /* size of memory chunk */
};
/* The kernel outputs diagnostic messages in a circular buffer. */
struct kmessages {
int km_next; /* next index to write */
int km_size; /* current size in buffer */
char km_buf[KMESS_BUF_SIZE]; /* buffer for messages */
};
struct randomness {
struct {
int r_next; /* next index to write */
int r_size; /* number of random elements */
unsigned short r_buf[RANDOM_ELEMENTS]; /* buffer for random info */
} bin[RANDOM_SOURCES];
};
#if (CHIP == INTEL)
typedef unsigned reg_t; /* machine register */
/* The stack frame layout is determined by the software, but for efficiency
* it is laid out so the assembly code to use it is as simple as possible.
* 80286 protected mode and all real modes use the same frame, built with
* 16-bit registers. Real mode lacks an automatic stack switch, so little
* is lost by using the 286 frame for it. The 386 frame differs only in
* having 32-bit registers and more segment registers. The same names are
* used for the larger registers to avoid differences in the code.
*/
struct stackframe_s { /* proc_ptr points here */
#if _WORD_SIZE == 4
u16_t gs; /* last item pushed by save */
u16_t fs; /* ^ */
#endif
u16_t es; /* | */
u16_t ds; /* | */
reg_t di; /* di through cx are not accessed in C */
reg_t si; /* order is to match pusha/popa */
reg_t fp; /* bp */
reg_t st; /* hole for another copy of sp */
reg_t bx; /* | */
reg_t dx; /* | */
reg_t cx; /* | */
reg_t retreg; /* ax and above are all pushed by save */
reg_t retadr; /* return address for assembly code save() */
reg_t pc; /* ^ last item pushed by interrupt */
reg_t cs; /* | */
reg_t psw; /* | */
reg_t sp; /* | */
reg_t ss; /* these are pushed by CPU during interrupt */
};
struct segdesc_s { /* segment descriptor for protected mode */
u16_t limit_low;
u16_t base_low;
u8_t base_middle;
u8_t access; /* |P|DL|1|X|E|R|A| */
u8_t granularity; /* |G|X|0|A|LIMT| */
u8_t base_high;
};
typedef unsigned long irq_policy_t;
typedef unsigned long irq_id_t;
typedef struct irq_hook {
struct irq_hook *next; /* next hook in chain */
int (*handler)(struct irq_hook *); /* interrupt handler */
int irq; /* IRQ vector number */
int id; /* id of this hook */
int proc_nr; /* NONE if not in use */
irq_id_t notify_id; /* id to return on interrupt */
irq_policy_t policy; /* bit mask for policy */
} irq_hook_t;
typedef int (*irq_handler_t)(struct irq_hook *);
#endif /* (CHIP == INTEL) */
#if (CHIP == M68000)
/* M68000 specific types go here. */
#endif /* (CHIP == M68000) */
#endif /* TYPE_H */