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/* $OpenBSD: cpu.h,v 1.15 2020/06/22 13:52:40 kettenis Exp $ */
/*
* Copyright (c) 2020 Mark Kettenis <kettenis@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef _MACHINE_CPU_H_
#define _MACHINE_CPU_H_
/*
* User-visible definitions
*/
/* Nothing yet */
#ifdef _KERNEL
/*
* Kernel-only definitions
*/
#include <machine/cpufunc.h>
#include <machine/frame.h>
#include <machine/intr.h>
#include <machine/psl.h>
#include <machine/pte.h>
#include <sys/device.h>
#include <sys/sched.h>
struct cpu_info {
struct device *ci_dev;
struct cpu_info *ci_next;
struct schedstate_percpu ci_schedstate;
struct proc *ci_curproc;
struct pcb *ci_curpcb;
struct slb ci_kernel_slb[32];
#define CPUSAVE_LEN 9
register_t ci_tempsave[CPUSAVE_LEN];
uint64_t ci_lasttb;
uint64_t ci_nexttimerevent;
uint64_t ci_nextstatevent;
int ci_statspending;
volatile int ci_cpl;
uint32_t ci_ipending;
uint32_t ci_idepth;
#ifdef DIAGNOSTIC
int ci_mutex_level;
#endif
int ci_want_resched;
uint32_t ci_randseed;
};
extern struct cpu_info cpu_info_primary;
register struct cpu_info *__curcpu asm("r13");
#define curcpu() __curcpu
#define MAXCPUS 1
#define CPU_IS_PRIMARY(ci) 1
#define CPU_INFO_UNIT(ci) 0
#define CPU_INFO_ITERATOR int
#define CPU_INFO_FOREACH(cii, ci) \
for (cii = 0, ci = curcpu(); ci != NULL; ci = NULL)
#define cpu_number() 0
#define CLKF_INTR(frame) 0
#define CLKF_USERMODE(frame) 0
#define CLKF_PC(frame) 0
#define aston(p) ((p)->p_md.md_astpending = 1)
#define need_proftick(p) aston(p)
#define cpu_kick(ci)
#define cpu_unidle(ci)
#define CPU_BUSY_CYCLE() do {} while (0)
#define signotify(p) setsoftast()
#define curpcb curcpu()->ci_curpcb
static inline unsigned int
cpu_rnd_messybits(void)
{
uint64_t tb;
__asm volatile("mftb %0" : "=r" (tb));
return ((tb > 32) ^ tb);
}
void need_resched(struct cpu_info *);
#define clear_resched(ci) ((ci)->ci_want_resched = 0)
void delay(u_int);
#define DELAY(x) delay(x)
#define setsoftast() aston(curcpu()->ci_curproc)
#define PROC_STACK(p) ((p)->p_md.md_regs->fixreg[1])
#define PROC_PC(p) ((p)->p_md.md_regs->srr0)
void proc_trampoline(void);
static inline void
intr_enable(void)
{
mtmsr(mfmsr() | PSL_EE);
}
static inline u_long
intr_disable(void)
{
u_long msr;
msr = mfmsr();
mtmsr(msr & ~PSL_EE);
return msr;
}
static inline void
intr_restore(u_long msr)
{
mtmsr(msr);
}
#endif /* _KERNEL */
#endif /* _MACHINE_CPU_H_ */
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