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/* $OpenBSD: cpu.h,v 1.13 2008/05/21 19:45:37 miod Exp $ */
/* $NetBSD: cpu.h,v 1.41 2006/01/21 04:24:12 uwe Exp $ */
/*-
* Copyright (c) 2002 The NetBSD Foundation, Inc. All rights reserved.
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* William Jolitz.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)cpu.h 5.4 (Berkeley) 5/9/91
*/
/*
* SH3/SH4 support.
*
* T.Horiuchi Brains Corp. 5/22/98
*/
#ifndef _SH_CPU_H_
#define _SH_CPU_H_
#include <sh/psl.h>
#include <sh/frame.h>
#ifdef _KERNEL
/*
* Per-CPU information.
*/
#include <sys/sched.h>
struct cpu_info {
struct proc *ci_curproc;
struct schedstate_percpu ci_schedstate; /* scheduler state */
};
extern struct cpu_info cpu_info_store;
#define curcpu() (&cpu_info_store)
#define cpu_number() 0
#define CPU_IS_PRIMARY(ci) 1
#define CPU_INFO_ITERATOR int
#define CPU_INFO_FOREACH(cii, ci) \
for (cii = 0, ci = curcpu(); ci != NULL; ci = NULL)
/*
* Arguments to hardclock and gatherstats encapsulate the previous
* machine state in an opaque clockframe.
*/
struct clockframe {
int spc; /* program counter at time of interrupt */
int ssr; /* status register at time of interrupt */
int ssp; /* stack pointer at time of interrupt */
};
#define CLKF_USERMODE(cf) (!KERNELMODE((cf)->ssr))
#define CLKF_PC(cf) ((cf)->spc)
#define CLKF_INTR(cf) 0 /* XXX */
/*
* This is used during profiling to integrate system time. It can safely
* assume that the process is resident.
*/
#define PROC_PC(p) \
(((struct trapframe *)(p)->p_md.md_regs)->tf_spc)
/*
* Preempt the current process if in interrupt from user mode,
* or after the current trap/syscall if in system mode.
*/
#define need_resched(ci) \
do { \
want_resched = 1; \
if (curproc != NULL) \
aston(curproc); \
} while (/*CONSTCOND*/0)
/*
* Give a profiling tick to the current process when the user profiling
* buffer pages are invalid. On the MIPS, request an ast to send us
* through trap, marking the proc as needing a profiling tick.
*/
#define need_proftick(p) aston(p)
/*
* Notify the current process (p) that it has a signal pending,
* process as soon as possible.
*/
#define signotify(p) aston(p)
#define aston(p) ((p)->p_md.md_astpending = 1)
extern int want_resched; /* need_resched() was called */
#define cpu_wait(p) ((void)(p))
/*
* We need a machine-independent name for this.
*/
#define DELAY(x) delay(x)
#define cpu_idle_enter() do { /* nothing */ } while (0)
#define cpu_idle_cycle() __asm volatile("sleep")
#define cpu_idle_leave() do { /* nothing */ } while (0)
#endif /* _KERNEL */
/*
* Logical address space of SH3/SH4 CPU.
*/
#define SH3_PHYS_MASK 0x1fffffff
#define SH3_P0SEG_BASE 0x00000000 /* TLB mapped, also U0SEG */
#define SH3_P0SEG_END 0x7fffffff
#define SH3_P1SEG_BASE 0x80000000 /* pa == va */
#define SH3_P1SEG_END 0x9fffffff
#define SH3_P2SEG_BASE 0xa0000000 /* pa == va, non-cacheable */
#define SH3_P2SEG_END 0xbfffffff
#define SH3_P3SEG_BASE 0xc0000000 /* TLB mapped, kernel mode */
#define SH3_P3SEG_END 0xdfffffff
#define SH3_P4SEG_BASE 0xe0000000 /* peripheral space */
#define SH3_P4SEG_END 0xffffffff
#define SH3_P1SEG_TO_PHYS(x) ((uint32_t)(x) & SH3_PHYS_MASK)
#define SH3_P2SEG_TO_PHYS(x) ((uint32_t)(x) & SH3_PHYS_MASK)
#define SH3_PHYS_TO_P1SEG(x) ((uint32_t)(x) | SH3_P1SEG_BASE)
#define SH3_PHYS_TO_P2SEG(x) ((uint32_t)(x) | SH3_P2SEG_BASE)
#define SH3_P1SEG_TO_P2SEG(x) ((uint32_t)(x) | 0x20000000)
#define SH3_P2SEG_TO_P1SEG(x) ((uint32_t)(x) & ~0x20000000)
#ifdef _KERNEL
#ifndef __lint__
/*
* Switch from P1 (cached) to P2 (uncached). This used to be written
* using gcc's assigned goto extension, but gcc4 aggressive optimizations
* tend to optimize that away under certain circumstances.
*/
#define RUN_P2 \
do { \
register uint32_t r0 asm("r0"); \
uint32_t pc; \
__asm volatile( \
" mov.l 1f, %1 ;" \
" mova 2f, %0 ;" \
" or %0, %1 ;" \
" jmp @%1 ;" \
" nop ;" \
" .align 2 ;" \
"1: .long 0x20000000;" \
"2:;" \
: "=r"(r0), "=r"(pc)); \
} while (0)
/*
* Switch from P2 (uncached) back to P1 (cached). We need to be
* running on P2 to access cache control, memory-mapped cache and TLB
* arrays, etc. and after touching them at least 8 instructinos are
* necessary before jumping to P1, so provide that padding here.
*/
#define RUN_P1 \
do { \
register uint32_t r0 asm("r0"); \
uint32_t pc; \
__asm volatile( \
/*1*/ " mov.l 1f, %1 ;" \
/*2*/ " mova 2f, %0 ;" \
/*3*/ " nop ;" \
/*4*/ " and %0, %1 ;" \
/*5*/ " nop ;" \
/*6*/ " nop ;" \
/*7*/ " nop ;" \
/*8*/ " nop ;" \
" jmp @%1 ;" \
" nop ;" \
" .align 2 ;" \
"1: .long ~0x20000000;" \
"2:;" \
: "=r"(r0), "=r"(pc)); \
} while (0)
/*
* If RUN_P1 is the last thing we do in a function we can omit it, b/c
* we are going to return to a P1 caller anyway, but we still need to
* ensure there's at least 8 instructions before jump to P1.
*/
#define PAD_P1_SWITCH __asm volatile ("nop;nop;nop;nop;nop;nop;nop;nop;")
#else /* __lint__ */
#define RUN_P2 do {} while (/* CONSTCOND */ 0)
#define RUN_P1 do {} while (/* CONSTCOND */ 0)
#define PAD_P1_SWITCH do {} while (/* CONSTCOND */ 0)
#endif
#endif
#if defined(SH4)
/* SH4 Processor Version Register */
#define SH4_PVR_ADDR 0xff000030 /* P4 address */
#define SH4_PVR (*(volatile uint32_t *) SH4_PVR_ADDR)
#define SH4_PRR_ADDR 0xff000044 /* P4 address */
#define SH4_PRR (*(volatile uint32_t *) SH4_PRR_ADDR)
#define SH4_PVR_MASK 0xffffff00
#define SH4_PVR_SH7750 0x04020500 /* SH7750 */
#define SH4_PVR_SH7750S 0x04020600 /* SH7750S */
#define SH4_PVR_SH775xR 0x04050000 /* SH775xR */
#define SH4_PVR_SH7751 0x04110000 /* SH7751 */
#define SH4_PRR_MASK 0xfffffff0
#define SH4_PRR_7750R 0x00000100 /* SH7750R */
#define SH4_PRR_7751R 0x00000110 /* SH7751R */
#endif
/*
* pull in #defines for kinds of processors
*/
#include <machine/cputypes.h>
#ifdef _KERNEL
void sh_cpu_init(int, int);
void sh_startup(void);
__dead void cpu_reset(void); /* soft reset */
void _cpu_spin(uint32_t); /* for delay loop. */
void delay(int);
struct pcb;
void savectx(struct pcb *);
struct fpreg;
void fpu_save(struct fpreg *);
void fpu_restore(struct fpreg *);
u_int cpu_dump(int (*)(dev_t, daddr64_t, caddr_t, size_t), daddr64_t *);
u_int cpu_dumpsize(void);
void dumpconf(void);
void dumpsys(void);
#endif /* _KERNEL */
#endif /* !_SH_CPU_H_ */
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