minix/kernel/type.h

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3.9 KiB
C
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2005-04-21 16:53:53 +02:00
#ifndef TYPE_H
#define TYPE_H
typedef _PROTOTYPE( void task_t, (void) );
typedef _PROTOTYPE( int (*rdwt_t), (message *m_ptr) );
typedef _PROTOTYPE( void (*watchdog_t), (void) );
/* This is used within the kernel to handle virtual copying. */
struct vir_addr {
int proc_nr;
int segment;
vir_bytes offset;
};
/* 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 */
typedef unsigned int notify_mask_t; /* bit mask for notifications */
typedef unsigned long send_mask_t; /* bit mask for sender */
struct system_image {
int proc_nr; /* process number to use */
task_t *initial_pc; /* start function for tasks */
int type; /* type of process */
int priority; /* scheduling priority */
int stksize; /* stack size for tasks */
send_mask_t sendmask; /* send mask protection */
char name[PROC_NAME_LEN]; /* name in process table */
};
struct memory {
phys_clicks base; /* start address of chunk */
phys_clicks size; /* size of memory chunk */
};
struct bios {
phys_bytes bios_addr; /* physical address at BIOS */
size_t bios_length; /* size of value */
};
#if (CHIP == INTEL)
typedef u16_t port_t;
typedef U16_t Port_t;
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 struct irq_hook {
struct irq_hook *next;
int (*handler)(struct irq_hook *);
int irq;
int id;
} irq_hook_t;
typedef int (*irq_handler_t)(struct irq_hook *);
/* The IRQ table is used to handle harware interrupts based on a policy set
* by a device driver. The policy is stored with a SYS_IRQCTL system call and
* used by a generic function to handle hardware interrupts in an appropriate
* way for the device.
*/
typedef unsigned long irq_policy_t;
struct irqtab {
irq_hook_t hook; /* its irq hook */
irq_policy_t policy; /* bit mask for the policy */
int proc_nr; /* process number to be notified */
long port; /* port to be read or written */
phys_bytes addr; /* absolute address to store or get value */
long mask_val; /* mask for strobing or value to be written */
};
#endif /* (CHIP == INTEL) */
#if (CHIP == M68000)
/* M68000 specific types go here. */
#endif /* (CHIP == M68000) */
#endif /* TYPE_H */