minix/kernel/type.h

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C
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#ifndef TYPE_H
#define TYPE_H
typedef _PROTOTYPE( void task_t, (void) );
/* Type accepted by kprintf(). This is a hack to accept both integers and
* char pointers in the same argument.
*/
typedef long karg_t; /* use largest type here */
/* Process related types.
* A process number defines the index into the process table. With a signed
* short we can support up to 256 user processes and more kernel tasks than
* one can ever create.
*/
typedef short proc_nr_t; /* process table entry number */
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typedef unsigned long send_mask_t; /* bit mask for sender */
struct system_image {
proc_nr_t proc_nr; /* process number to use */
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task_t *initial_pc; /* start function for tasks */
int type; /* type of process */
int priority; /* scheduling priority */
int stksize; /* stack size for tasks */
char call_mask; /* allowed system calls */
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send_mask_t sendmask; /* send mask protection */
char proc_name[P_NAME_LEN]; /* name in process table */
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};
struct memory {
phys_clicks base; /* start address of chunk */
phys_clicks size; /* size of memory chunk */
};
typedef unsigned long notify_mask_t; /* bit mask for notifications */
typedef short notify_type_t; /* notification type */
typedef char notify_flags_t; /* notification flags */
typedef int notify_arg_t; /* notification argument */
struct notification {
proc_nr_t n_source; /* sender of notification */
notify_type_t n_type; /* notification type */
notify_arg_t n_arg; /* notification argument */
notify_flags_t n_flags; /* notification flags */
struct notification* n_next; /* pointer to next notification */
};
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/* 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 */
};
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#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;
};
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typedef unsigned long irq_policy_t;
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typedef struct irq_hook {
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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_policy_t policy; /* bit mask for policy */
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} 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 */