ad4dcaab71
- idle task becomes a pseudo task which is never scheduled. It is never put on any run queue and never enters userspace. An entry for this task still remains in the process table for time accounting - Instead of panicing if there is not process to schedule, pick_proc() returns NULL which is a signal to put the cpu in an idle state and set everything in such a way that after receiving and interrupt it looks like idle task was preempted - idle task is set non-preemptible to avoid handling in the timer interrupt code which make userspace scheduling simpler as idle task does not need to be handled as a special case.
169 lines
7.5 KiB
C
169 lines
7.5 KiB
C
/* Function prototypes. */
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#ifndef PROTO_H
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#define PROTO_H
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#include <minix/safecopies.h>
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#include <archtypes.h>
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#include <a.out.h>
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/* Struct declarations. */
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struct proc;
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struct timer;
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/* clock.c */
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_PROTOTYPE( void clock_task, (void) );
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_PROTOTYPE( clock_t get_uptime, (void) );
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_PROTOTYPE( void set_timer, (struct timer *tp, clock_t t, tmr_func_t f) );
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_PROTOTYPE( void reset_timer, (struct timer *tp) );
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_PROTOTYPE( void ser_dump_proc, (void) );
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/* main.c */
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_PROTOTYPE( void main, (void) );
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_PROTOTYPE( void prepare_shutdown, (int how) );
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_PROTOTYPE( void minix_shutdown, (struct timer *tp) );
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/* utility.c */
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_PROTOTYPE( int kprintf, (const char *fmt, ...) );
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_PROTOTYPE( void minix_panic, (char *s, int n) );
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/* proc.c */
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_PROTOTYPE( int sys_call, (int call_nr, int src_dst,
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message *m_ptr, long bit_map) );
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_PROTOTYPE( int lock_notify, (int src, int dst) );
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_PROTOTYPE( int mini_notify, (struct proc *src, endpoint_t dst) );
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_PROTOTYPE( int lock_send, (int dst, message *m_ptr) );
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_PROTOTYPE( void enqueue, (struct proc *rp) );
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_PROTOTYPE( void dequeue, (struct proc *rp) );
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_PROTOTYPE( void balance_queues, (struct timer *tp) );
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_PROTOTYPE( struct proc * schedcheck, (void) );
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_PROTOTYPE( struct proc * arch_finish_schedcheck, (void) );
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_PROTOTYPE( struct proc *endpoint_lookup, (endpoint_t ep) );
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#if DEBUG_ENABLE_IPC_WARNINGS
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_PROTOTYPE( int isokendpt_f, (char *file, int line, endpoint_t e, int *p, int f));
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#define isokendpt_d(e, p, f) isokendpt_f(__FILE__, __LINE__, (e), (p), (f))
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#else
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_PROTOTYPE( int isokendpt_f, (endpoint_t e, int *p, int f) );
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#define isokendpt_d(e, p, f) isokendpt_f((e), (p), (f))
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#endif
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/* start.c */
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_PROTOTYPE( void cstart, (U16_t cs, U16_t ds, U16_t mds,
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U16_t parmoff, U16_t parmsize) );
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/* system.c */
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_PROTOTYPE( int get_priv, (register struct proc *rc, int proc_type) );
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_PROTOTYPE( void set_sendto_bit, (struct proc *rc, int id) );
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_PROTOTYPE( void unset_sendto_bit, (struct proc *rc, int id) );
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_PROTOTYPE( void send_sig, (int proc_nr, int sig_nr) );
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_PROTOTYPE( void cause_sig, (int proc_nr, int sig_nr) );
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_PROTOTYPE( void sig_delay_done, (struct proc *rp) );
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_PROTOTYPE( void sys_task, (void) );
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#define numap_local(proc_nr, vir_addr, bytes) \
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umap_local(proc_addr(proc_nr), D, (vir_addr), (bytes))
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_PROTOTYPE( phys_bytes umap_grant, (struct proc *, cp_grant_id_t,
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vir_bytes));
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_PROTOTYPE( void clear_endpoint, (struct proc *rc) );
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_PROTOTYPE( phys_bytes umap_bios, (vir_bytes vir_addr, vir_bytes bytes));
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/* system/do_newmap.c */
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_PROTOTYPE( int newmap, (struct proc *rp, struct mem_map *map_ptr) );
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/* system/do_vtimer.c */
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_PROTOTYPE( void vtimer_check, (struct proc *rp) );
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/* interrupt.c */
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_PROTOTYPE( void put_irq_handler, (irq_hook_t *hook, int irq,
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irq_handler_t handler) );
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_PROTOTYPE( void rm_irq_handler, (irq_hook_t *hook) );
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_PROTOTYPE( void enable_irq, (irq_hook_t *hook) );
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_PROTOTYPE( int disable_irq, (irq_hook_t *hook) );
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_PROTOTYPE( void cons_setc, (int pos, int c) );
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_PROTOTYPE( void cons_seth, (int pos, int n) );
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/* debug.c */
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#if DEBUG_SCHED_CHECK
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#define CHECK_RUNQUEUES check_runqueues_f(__FILE__, __LINE__)
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_PROTOTYPE( void check_runqueues_f, (char *file, int line) );
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#endif
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_PROTOTYPE( char *rtsflagstr, (int flags) );
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_PROTOTYPE( char *miscflagstr, (int flags) );
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/* system/do_safecopy.c */
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_PROTOTYPE( int verify_grant, (endpoint_t, endpoint_t, cp_grant_id_t, vir_bytes,
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int, vir_bytes, vir_bytes *, endpoint_t *));
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/* system/do_sysctl.c */
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_PROTOTYPE( int do_sysctl, (message *m));
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#if SPROFILE
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/* profile.c */
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_PROTOTYPE( void init_profile_clock, (u32_t) );
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_PROTOTYPE( void stop_profile_clock, (void) );
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#endif
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/* functions defined in architecture-dependent files. */
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_PROTOTYPE( phys_bytes phys_copy, (phys_bytes source, phys_bytes dest,
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phys_bytes count) );
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_PROTOTYPE( void phys_copy_fault, (void));
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_PROTOTYPE( void phys_copy_fault_in_kernel, (void));
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#define virtual_copy(src, dst, bytes) virtual_copy_f(src, dst, bytes, 0)
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#define virtual_copy_vmcheck(src, dst, bytes) virtual_copy_f(src, dst, bytes, 1)
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_PROTOTYPE( int virtual_copy_f, (struct vir_addr *src, struct vir_addr *dst,
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vir_bytes bytes, int vmcheck) );
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_PROTOTYPE( int data_copy, (endpoint_t from, vir_bytes from_addr,
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endpoint_t to, vir_bytes to_addr, size_t bytes));
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_PROTOTYPE( int data_copy_vmcheck, (endpoint_t from, vir_bytes from_addr,
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endpoint_t to, vir_bytes to_addr, size_t bytes));
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#define data_copy_to(d, p, v, n) data_copy(SYSTEM, (d), (p), (v), (n));
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#define data_copy_from(d, p, v, n) data_copy((p), (v), SYSTEM, (d), (n));
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_PROTOTYPE( void alloc_segments, (struct proc *rp) );
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_PROTOTYPE( void vm_init, (struct proc *first) );
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_PROTOTYPE( int vm_copy, (vir_bytes src, struct proc *srcproc,
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vir_bytes dst, struct proc *dstproc, phys_bytes bytes));
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_PROTOTYPE( phys_bytes umap_local, (register struct proc *rp, int seg,
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vir_bytes vir_addr, vir_bytes bytes));
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_PROTOTYPE( void cp_mess, (int src,phys_clicks src_clicks,
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vir_bytes src_offset, phys_clicks dst_clicks, vir_bytes dst_offset));
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_PROTOTYPE( phys_bytes umap_remote, (struct proc* rp, int seg,
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vir_bytes vir_addr, vir_bytes bytes) );
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_PROTOTYPE( phys_bytes umap_virtual, (struct proc* rp, int seg,
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vir_bytes vir_addr, vir_bytes bytes) );
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_PROTOTYPE( phys_bytes seg2phys, (U16_t) );
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_PROTOTYPE( int vm_phys_memset, (phys_bytes source, u8_t pattern,
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phys_bytes count) );
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_PROTOTYPE( vir_bytes alloc_remote_segment, (u32_t *, segframe_t *,
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int, phys_bytes, vir_bytes, int));
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_PROTOTYPE( int intr_init, (int) );
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_PROTOTYPE( int intr_disabled, (void) );
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_PROTOTYPE( void halt_cpu, (void) );
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_PROTOTYPE( void arch_init, (void) );
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_PROTOTYPE( void ser_putc, (char) );
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_PROTOTYPE( void arch_shutdown, (int) );
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_PROTOTYPE( void arch_monitor, (void) );
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_PROTOTYPE( void arch_get_aout_headers, (int i, struct exec *h) );
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_PROTOTYPE( void restart, (void) );
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_PROTOTYPE( void read_tsc, (unsigned long *high, unsigned long *low) );
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_PROTOTYPE( int arch_init_profile_clock, (u32_t freq) );
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_PROTOTYPE( void arch_stop_profile_clock, (void) );
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_PROTOTYPE( void arch_ack_profile_clock, (void) );
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_PROTOTYPE( void do_ser_debug, (void) );
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_PROTOTYPE( int arch_get_params, (char *parm, int max));
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_PROTOTYPE( int arch_set_params, (char *parm, int max));
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_PROTOTYPE( int arch_pre_exec, (struct proc *pr, u32_t, u32_t));
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_PROTOTYPE( int arch_umap, (struct proc *pr, vir_bytes, vir_bytes,
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int, phys_bytes *));
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_PROTOTYPE( int arch_do_vmctl, (message *m_ptr, struct proc *p));
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_PROTOTYPE( int vm_contiguous, (struct proc *targetproc, u32_t vir_buf, size_t count));
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_PROTOTYPE( void proc_stacktrace, (struct proc *proc) );
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_PROTOTYPE( int vm_lookup, (struct proc *proc, vir_bytes virtual, vir_bytes *result, u32_t *ptent));
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_PROTOTYPE( int vm_suspend, (struct proc *caller, struct proc *target,
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phys_bytes lin, phys_bytes size, int wrflag, int type));
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_PROTOTYPE( int delivermsg, (struct proc *target));
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_PROTOTYPE( void arch_do_syscall, (struct proc *proc) );
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_PROTOTYPE( int arch_phys_map, (int index, phys_bytes *addr,
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phys_bytes *len, int *flags));
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_PROTOTYPE( int arch_phys_map_reply, (int index, vir_bytes addr));
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_PROTOTYPE( int arch_enable_paging, (void));
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#endif /* PROTO_H */
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