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Diffstat (limited to 'sys/amd64/include/cpu.h')
| -rw-r--r-- | sys/amd64/include/cpu.h | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/sys/amd64/include/cpu.h b/sys/amd64/include/cpu.h new file mode 100644 index 000000000000..57f2a0b59bbb --- /dev/null +++ b/sys/amd64/include/cpu.h @@ -0,0 +1,99 @@ +/*- + * SPDX-License-Identifier: BSD-3-Clause + * + * 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. + */ + +#ifndef _MACHINE_CPU_H_ +#define _MACHINE_CPU_H_ + +/* + * Definitions unique to i386 cpu support. + */ +#include <machine/psl.h> +#include <machine/frame.h> +#include <machine/segments.h> + +#define cpu_exec(p) /* nothing */ +#define cpu_swapin(p) /* nothing */ +#define cpu_getstack(td) ((td)->td_frame->tf_rsp) +#define cpu_setstack(td, ap) ((td)->td_frame->tf_rsp = (ap)) +#define cpu_spinwait() ia32_pause() + +#define TRAPF_USERMODE(framep) \ + (ISPL((framep)->tf_cs) == SEL_UPL) +#define TRAPF_PC(framep) ((framep)->tf_rip) + +#ifdef _KERNEL +/* + * Struct containing pointers to CPU management functions whose + * implementation is run time selectable. Selection can be made, + * for example, based on detection of a particular CPU variant or + * hypervisor environment. + */ +struct cpu_ops { + void (*cpu_init)(void); + void (*cpu_resume)(void); +}; + +extern struct cpu_ops cpu_ops; +extern char brwsection[]; +extern char btext[]; +extern char _end[]; +extern char etext[]; + +/* Suspend and resume hook for VMM. */ +extern void (*vmm_suspend_p)(void); +extern void (*vmm_resume_p)(void); + +void cpu_halt(void); +void cpu_lock_delay(void); +void cpu_reset(void); +void fork_trampoline(void); + +/* + * Return contents of in-cpu fast counter as a sort of "bogo-time" + * for random-harvesting purposes. + */ +static __inline u_int64_t +get_cyclecount(void) +{ + + return (rdtsc()); +} + +#define MEMSET_EARLY_FUNC memset_std +#define MEMCPY_EARLY_FUNC memcpy_std +#define MEMMOVE_EARLY_FUNC memmove_std + +#endif + +#endif /* !_MACHINE_CPU_H_ */ |