1/*      $NetBSD: cpu.h,v 1.108 2023/12/19 00:29:48 kalvisd Exp $      */
2
3/*
4 * Copyright (c) 1994 Ludd, University of Lule}, Sweden
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#ifndef _VAX_CPU_H_
29#define _VAX_CPU_H_
30
31#if defined(_KERNEL_OPT)
32#include "opt_gprof.h"
33#include "opt_multiprocessor.h"
34#include "opt_lockdebug.h"
35#endif
36
37#define	CPU_PRINTFATALTRAPS	1
38#define	CPU_CONSDEV		2
39#define	CPU_BOOTED_DEVICE	3
40#define	CPU_BOOTED_KERNEL	4
41
42#ifdef _KERNEL
43
44#include <sys/cdefs.h>
45#include <sys/queue.h>
46#include <sys/device_if.h>
47#include <sys/cpu_data.h>
48
49#include <machine/mtpr.h>
50#include <machine/pcb.h>
51#include <machine/uvax.h>
52#include <machine/psl.h>
53
54#define enablertclock()
55
56/*
57 * All cpu-dependent info is kept in this struct. Pointer to the
58 * struct for the current cpu is set up in locore.c.
59 */
60struct cpu_info;
61
62struct cpu_dep {
63	void	(*cpu_steal_pages)(void); /* pmap init before mm is on */
64	int	(*cpu_mchk)(void *);   /* Machine check handling */
65	void	(*cpu_memerr)(void); /* Memory subsystem errors */
66	    /* Autoconfiguration */
67	void	(*cpu_conf)(void);
68	int	(*cpu_gettime)(struct timeval *); /* Read cpu clock time */
69	void	(*cpu_settime)(struct timeval *); /* Write system time to cpu */
70	short	cpu_vups;		/* speed of cpu */
71	short	cpu_scbsz;		/* (estimated) size of SCB */
72	void	(*cpu_halt)(void);	/* Cpu dependent halt call */
73	void	(*cpu_reboot)(int);	/* Cpu dependent reboot call */
74	void	(*cpu_clrf)(void);	/* Clear cold/warm start flags */
75	const char * const *cpu_devs;	/* mainbus devices */
76	void	(*cpu_attach_cpu)(device_t);	/* print CPU info */
77	int     cpu_flags;
78	void	(*cpu_badaddr)(void);	/* cpu-specific badaddr() */
79};
80
81#if defined(MULTIPROCESSOR)
82/*
83 * All cpu-dependent calls for multicpu systems goes here.
84 */
85struct cpu_mp_dep {
86	void	(*cpu_startslave)(struct cpu_info *);
87	void	(*cpu_send_ipi)(struct cpu_info *);
88	void	(*cpu_cnintr)(void);
89};
90/*
91 * NOTE: This is not bit mask, this is bit _number_.
92 */
93#define	IPI_START_CNTX	1	/* Start console transmitter, proc out */
94#define	IPI_SEND_CNCHAR	2	/* Write char to console, kernel printf */
95#define	IPI_RUNNING	3	/* This CPU just started to run */
96#define	IPI_TBIA	4	/* Flush the TLB */
97#define	IPI_DDB		5	/* Jump into the DDB loop */
98#define	IPI_XCALL	6	/* Helper for xcall(9) */
99#define	IPI_GENERIC	7	/* Generic ipi(9) call */
100
101#define	IPI_DEST_MASTER	-1	/* Destination is mastercpu */
102#define	IPI_DEST_ALL	-2	/* Broadcast */
103
104extern const struct cpu_mp_dep *mp_dep_call;
105#endif /* defined(MULTIPROCESSOR) */
106
107#define	CPU_RAISEIPL	1	/* Must raise IPL until intr is handled */
108
109extern const struct cpu_dep *dep_call;
110				/* Holds pointer to current CPU struct. */
111
112struct clockframe {
113        int     pc;
114        int     ps;
115};
116
117struct cpu_info {
118	/*
119	 * Public members.
120	 */
121	struct cpu_data ci_data;	/* MI per-cpu data */
122	device_t ci_dev;		/* device struct for this cpu */
123	int ci_mtx_oldspl;		/* saved spl */
124	int ci_mtx_count;		/* negative count of mutexes */
125	int ci_cpuid;			/* h/w specific cpu id */
126	int ci_want_resched;		/* Should change process */
127
128	/*
129	 * Private members.
130	 */
131#if defined(__HAVE_FAST_SOFTINTS)
132	lwp_t *ci_softlwps[SOFTINT_COUNT];
133#endif
134	vaddr_t ci_istack;		/* Interrupt stack location */
135	const char *ci_cpustr;
136	int ci_slotid;			/* cpu slot */
137	struct lwp *ci_onproc;		/* current user LWP / kthread */
138#if defined(MULTIPROCESSOR)
139	struct lwp *ci_curlwp;		/* current lwp (for other cpus) */
140	volatile int ci_flags;		/* See below */
141	long ci_ipimsgs;		/* Sent IPI bits */
142	struct trapframe *ci_ddb_regs;	/* Used by DDB */
143	SIMPLEQ_ENTRY(cpu_info) ci_next; /* next cpu_info */
144#endif
145	uintptr_t ci_cas_addr;		/* current address doing CAS in a RAS */
146#if defined(GPROF) && defined(MULTIPROCESSOR)
147	struct gmonparam *ci_gmon;	/* MI per-cpu GPROF */
148#endif
149};
150#define	CI_MASTERCPU	1		/* Set if master CPU */
151#define	CI_RUNNING	2		/* Set when a slave CPU is running */
152#define	CI_STOPPED	4		/* Stopped (in debugger) */
153
154extern int cpu_printfataltraps;
155
156#define	curcpu()		(curlwp->l_cpu + 0)
157#define	curlwp			((struct lwp *)mfpr(PR_SSP))
158#define	cpu_number()		(curcpu()->ci_cpuid)
159#define	cpu_need_resched(ci, l, flags)		\
160	do {							\
161		struct pcb *pcb = lwp_getpcb(curlwp);		\
162		__USE(flags);					\
163		pcb->P0LR = (pcb->P0LR & ~AST_MASK) | AST_ON;	\
164		mtpr(AST_OK,PR_ASTLVL);				\
165	} while (/*CONSTCOND*/ 0)
166#define	cpu_proc_fork(x, y)	do { } while (/*CONSCOND*/0)
167
168/*
169 * This allows SIMH to recognize the kernel wants to sleep.
170 */
171static inline void
172cpu_idle(void)
173{
174	int ipl = mfpr(PR_IPL);
175	mtpr(1, PR_IPL);
176	mtpr(ipl, PR_IPL);
177}
178
179static inline bool
180cpu_intr_p(void)
181{
182	register_t psl;
183	__asm("movpsl %0" : "=g"(psl));
184	return (psl & PSL_IS) != 0;
185}
186#if defined(MULTIPROCESSOR)
187#define	CPU_IS_PRIMARY(ci)	((ci)->ci_flags & CI_MASTERCPU)
188
189#define	CPU_INFO_ITERATOR	int __unused
190#define	CPU_INFO_FOREACH(cii, ci)	ci = SIMPLEQ_FIRST(&cpus); \
191					ci != NULL; \
192					ci = SIMPLEQ_NEXT(ci, ci_next)
193
194extern SIMPLEQ_HEAD(cpu_info_qh, cpu_info) cpus;
195extern char vax_mp_tramp;
196#endif
197
198/*
199 * Notify the current process (p) that it has a signal pending,
200 * process as soon as possible.
201 */
202
203#define cpu_signotify(l)					\
204	do {							\
205		struct pcb *pcb = lwp_getpcb(l);		\
206		pcb->P0LR = (pcb->P0LR & ~AST_MASK) | AST_ON;	\
207		mtpr(AST_OK,PR_ASTLVL);				\
208	} while (/*CONSTCOND*/ 0)
209
210
211/*
212 * Give a profiling tick to the current process when the user profiling
213 * buffer pages are invalid.  On the hp300, request an ast to send us
214 * through trap, marking the proc as needing a profiling tick.
215 */
216#define cpu_need_proftick(l) 					\
217	do {							\
218		struct pcb *pcb = lwp_getpcb(l);		\
219		(l)->l_pflag |= LP_OWEUPC;			\
220		pcb->P0LR = (pcb->P0LR & ~AST_MASK) | AST_ON;	\
221		mtpr(AST_OK,PR_ASTLVL);				\
222	} while (/*CONSTCOND*/ 0)
223
224/*
225 * This defines the I/O device register space size in pages.
226 */
227#define	IOSPSZ	((64*1024) / VAX_NBPG)	/* 64k == 128 pages */
228
229#define	LWP_PC(l)	cpu_lwp_pc(l)
230
231struct buf;
232struct pte;
233
234#include <sys/lwp.h>
235
236/* Some low-level prototypes */
237#if defined(MULTIPROCESSOR)
238void	cpu_slavesetup(device_t, int);
239void	cpu_boot_secondary_processors(void);
240void	cpu_send_ipi(int, int);
241void	cpu_handle_ipi(void);
242#endif
243vaddr_t	cpu_lwp_pc(struct lwp *);
244int	badaddr(volatile void *, int);
245void	dumpsys(void);
246void	swapconf(void);
247void	disk_printtype(int, int);
248void	disk_reallymapin(struct buf *, struct pte *, int, int);
249vaddr_t	vax_map_physmem(paddr_t, size_t);
250void	vax_unmap_physmem(vaddr_t, size_t);
251void	ioaccess(vaddr_t, paddr_t, size_t);
252void	iounaccess(vaddr_t, size_t);
253void	findcpu(void);
254#ifdef DDB
255int	kdbrint(int);
256#endif
257#endif /* _KERNEL */
258#ifdef _STANDALONE
259void	findcpu(void);
260#endif
261#endif /* _VAX_CPU_H_ */
262