* Copyright (c) 1992 Regents of the University of California.
* This code is derived from software contributed to Berkeley by
* %sccs.include.redist.c%
* @(#)cpu.h 7.2 (Berkeley) %G%
* Exported definitions unique to pmax/mips cpu support.
* definitions of cpu-dependent requirements
* referenced in generic code
#undef COPY_SIGCODE /* copy sigcode above user stack in exec */
* function vs. inline configuration;
* these are defined to get generic functions
* rather than inline or machine-dependent implementations
#define NEED_MINMAX /* need {,i,l,ul}{min,max} functions */
#undef NEED_FFS /* don't need ffs function */
#undef NEED_BCMP /* don't need bcmp function */
#undef NEED_STRLEN /* don't need strlen function */
#define cpu_exec(p) (p->p_md.md_ss_addr = 0) /* init single step */
#define cpu_wait(p) /* nothing */
* Arguments to hardclock, softclock and gatherstats
* encapsulate the previous machine state in an opaque
typedef struct intrframe
{
#define CLKF_USERMODE(framep) ((framep)->ps & MACH_SR_KU_PREV)
#define CLKF_BASEPRI(framep) \
(((framep)->ps & (MACH_INT_MASK | MACH_SR_INT_ENA_PREV)) == \
(MACH_INT_MASK | MACH_SR_INT_ENA_PREV))
#define CLKF_PC(framep) ((framep)->pc)
* Preempt the current process if in interrupt from user mode,
* or after the current trap/syscall if in system mode.
#define need_resched() { want_resched = 1; aston(); }
* Give a profiling tick to the current process from the softclock
#define profile_tick(p, framep) \
addupc((framep)->pc, &p->p_stats->p_prof, 1);
* Notify the current process (p) that it has a signal pending,
* process as soon as possible.
#define signotify(p) aston()
#define aston() (astpending = 1)
int astpending
; /* need to trap before returning to user mode */
int want_resched
; /* resched() was called */
* CPU identification, from PRID register.
#if BYTE_ORDER == BIG_ENDIAN
u_int pad1
:16; /* reserved */
u_int cp_imp
:8; /* implementation identifier */
u_int cp_majrev
:4; /* major revision identifier */
u_int cp_minrev
:4; /* minor revision identifier */
u_int cp_minrev
:4; /* minor revision identifier */
u_int cp_majrev
:4; /* major revision identifier */
u_int cp_imp
:8; /* implementation identifier */
u_int pad1
:16; /* reserved */
* MIPS CPU types (cp_imp).
void (*func
)(); /* pointer to interrupt routine */
int unit
; /* logical unit number */
extern struct intr_tab intr_tab
[];
* Enable realtime clock (always enabled).