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freebsd-skq/sys/i386/include/cpu.h

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Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
/*-
* 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.
* 4. 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.
*
All: Remove patch kit headers, and add $Id$ This is mostly to align some more code with NetBSD. cpu.h: Remove the old function vs. include configuration stuff that was ifdefed out when we went to inline functions. Remove the define of resettodr that made it a nop, there is already a function that makes it a nop, no need to #define one. Remove the #defines of processor types, they are now defined in cputypes.h, #include that file. Add struct cpu_nameclass for support of cpu types. frame.h: include sys/signal.h, it will be needed in the future. put the sigframe structure here that was in machdep.c pcb.h: Add multiple inclusion protection. Add pcb_ldt and pcb_ldt_len to pcb structure, this is for the user mode ldt.
1993-10-08 20:51:00 +00:00
* from: @(#)cpu.h 5.4 (Berkeley) 5/9/91
$Id$ -> $FreeBSD$
1999-08-28 01:08:13 +00:00
* $FreeBSD$
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
*/
Made all header files idempotent and moved incorrect common data from headers into a related source file. Added cons.h as first step towards moving i386/i386/cons.h to machine/cons.h where it belongs.
1993-11-07 17:43:17 +00:00
#ifndef _MACHINE_CPU_H_
Clean up #includes. <machine/spl.h> has to be included by almost everything in case an spl inline is used, so this is not the place to include it. Uniformize idempotency #ifdef.
1994-09-18 21:37:56 +00:00
#define _MACHINE_CPU_H_
Made all header files idempotent and moved incorrect common data from headers into a related source file. Added cons.h as first step towards moving i386/i386/cons.h to machine/cons.h where it belongs.
1993-11-07 17:43:17 +00:00
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
/*
* Definitions unique to i386 cpu support.
*/
VM86 kernel support. Work done by BSDI, Jonathan Lemon <jlemon@americantv.com>, Mike Smith <msmith@gsoft.com.au>, Sean Eric Fagan <sef@kithrup.com>, and probably alot of others. Submitted by: Jnathan Lemon <jlemon@americantv.com>
1997-08-09 00:04:06 +00:00
#include <machine/psl.h>
Change all #includes to follow the current Berkeley style. Some of these ``changes'' are actually not changes at all, but CVS sometimes has trouble telling the difference. This also includes support for second-directory compiles. This is not quite complete yet, as `config' doesn't yet do the right thing. You can still make it work trivially, however, by doing the following: rm /sys/compile mkdir /usr/obj/sys/compile ln -s M-. /sys/compile cd /sys/i386/conf config MYKERNEL cd ../../compile/MYKERNEL ln -s /sys @ rm machine ln -s @/i386/include machine make depend make
1994-08-13 03:50:34 +00:00
#include <machine/frame.h>
#include <machine/segments.h>
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
#define cpu_exec(p) /* nothing */
Instead of calling ia32_pause() conditionally on __i386__ or __amd64__ being defined, define and use a new MD macro, cpu_spinwait(). It only expands to something on i386 and amd64, so the compiled code should be identical. Name of the macro found by: jhb Reviewed by: jhb
2004-08-03 18:44:27 +00:00
#define cpu_swapin(p) /* nothing */
KSE Milestone 2 Note ALL MODULES MUST BE RECOMPILED make the kernel aware that there are smaller units of scheduling than the process. (but only allow one thread per process at this time). This is functionally equivalent to teh previousl -current except that there is a thread associated with each process. Sorry john! (your next MFC will be a doosie!) Reviewed by: peter@freebsd.org, dillon@freebsd.org X-MFC after: ha ha ha ha
2001-09-12 08:38:13 +00:00
#define cpu_getstack(td) ((td)->td_frame->tf_esp)
Instead of calling ia32_pause() conditionally on __i386__ or __amd64__ being defined, define and use a new MD macro, cpu_spinwait(). It only expands to something on i386 and amd64, so the compiled code should be identical. Name of the macro found by: jhb Reviewed by: jhb
2004-08-03 18:44:27 +00:00
#define cpu_setstack(td, ap) ((td)->td_frame->tf_esp = (ap))
#define cpu_spinwait() ia32_pause()
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
- Make astpending and need_resched process attributes rather than CPU attributes. This is needed for AST's to be properly posted in a preemptive kernel. They are backed by two new flags in p_sflag: PS_ASTPENDING and PS_NEEDRESCHED. They are still accesssed by their old macros: aston(), astoff(), etc. For completeness, an astpending() macro has been added to check for a pending AST, and clear_resched() has been added to clear need_resched(). - Rename syscall2() on the x86 back to syscall() to be consistent with other architectures.
2001-02-10 02:20:34 +00:00
#define TRAPF_USERMODE(framep) \
((ISPL((framep)->tf_cs) == SEL_UPL) || ((framep)->tf_eflags & PSL_VM))
#define TRAPF_PC(framep) ((framep)->tf_eip)
Revert r253748,253749 This WIP should not have been committed yet. Pointyhat to: avg
2013-07-28 18:44:17 +00:00
#ifdef _KERNEL
Implement PV IPIs for PVHVM guests and further converge PV and HVM IPI implmementations. Submitted by: Roger Pau Monné Sponsored by: Citrix Systems R&D Submitted by: gibbs (misc cleanup, table driven config) Reviewed by: gibbs MFC after: 2 weeks sys/amd64/include/cpufunc.h: sys/amd64/amd64/pmap.c: Move invltlb_globpcid() into cpufunc.h so that it can be used by the Xen HVM version of tlb shootdown IPI handlers. sys/x86/xen/xen_intr.c: sys/xen/xen_intr.h: Rename xen_intr_bind_ipi() to xen_intr_alloc_and_bind_ipi(), and remove the ipi vector parameter. This api allocates an event channel port that can be used for ipi services, but knows nothing of the actual ipi for which that port will be used. Removing the unused argument and cleaning up the comments surrounding its declaration helps clarify its actual role. sys/amd64/amd64/mp_machdep.c: sys/amd64/include/cpu.h: sys/i386/i386/mp_machdep.c: sys/i386/include/cpu.h: Implement a generic framework for amd64 and i386 that allows the implementation of certain CPU management functions to be selected at runtime. Currently this is only used for the ipi send function, which we optimize for Xen when running on a Xen hypervisor, but can easily be expanded to support more operations. sys/x86/xen/hvm.c: Implement Xen PV IPI handlers and operations, replacing native send IPI. sys/amd64/include/pcpu.h: sys/i386/include/pcpu.h: sys/i386/include/smp.h: Remove NR_VIRQS and NR_IPIS from FreeBSD headers. NR_VIRQS is defined already for us in the xen interface files. NR_IPIS is only needed in one file per Xen platform and is easily inferred by the IPI vector table that is defined in those files. sys/i386/xen/mp_machdep.c: Restructure to more closely match the HVM implementation by performing table driven IPI setup.
2013-09-06 22:17:02 +00:00
/*
* 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 (*ipi_vectored)(u_int, int);
};
extern struct cpu_ops cpu_ops;
Moved declaration of etext from <machine/md_var.h> to <machine/cpu.h> and fixed everything that dependended on it being declared in the old place. It is used in "machine-independent" code in subr_prof.c. Moved declaration of btext from subr_prof.c to <machine/cpu.h>. It is machine-dependent.
1997-10-27 17:23:18 +00:00
extern char btext[];
extern char etext[];
The biggie: Get rid of the UPAGES from the top of the per-process address space. (!) Have each process use the kernel stack and pcb in the kvm space. Since the stacks are at a different address, we cannot copy the stack at fork() and allow the child to return up through the function call tree to return to user mode - create a new execution context and have the new process begin executing from cpu_switch() and go to user mode directly. In theory this should speed up fork a bit. Context switch the tss_esp0 pointer in the common tss. This is a lot simpler since than swithching the gdt[GPROC0_SEL].sd.sd_base pointer to each process's tss since the esp0 pointer is a 32 bit pointer, and the sd_base setting is split into three different bit sections at non-aligned boundaries and requires a lot of twiddling to reset. The 8K of memory at the top of the process space is now empty, and unmapped (and unmappable, it's higher than VM_MAXUSER_ADDRESS). Simplity the pmap code to manage process contexts, we no longer have to double map the UPAGES, this simplifies and should measuably speed up fork(). The following parts came from John Dyson: Set PG_G on the UPAGES that are now in kernel context, and invalidate them when swapping them out. Move the upages object (upobj) from the vmspace to the proc structure. Now that the UPAGES (pcb and kernel stack) are out of user space, make rfork(..RFMEM..) do what was intended by sharing the vmspace entirely via reference counting rather than simply inheriting the mappings.
1997-04-07 07:16:06 +00:00
Further cleanup <machine/cpu.h> and <machine/md_var.h>: move the MI prototypes of cpu_halt(), cpu_reset() and swi_vm() from md_var.h to cpu.h. This affects db_command.c and kern_shutdown.c. ia64: move all MD prototypes from cpu.h to md_var.h. This affects madt.c, interrupt.c and mp_machdep.c. Remove is_physical_memory(). It's not used (vm_machdep.c). alpha: the MD prototypes have been left in cpu.h with a comment that they should be there. Moving them is left for later. It was expected that the impact would be significant enough to be done in a seperate commit. powerpc: MD prototypes left in cpu.h. Comment added. Suggested by: bde Tested with: make universe (pc98 incomplete)
2003-08-16 16:57:57 +00:00
void cpu_halt(void);
void cpu_reset(void);
Remove __P.
2002-03-20 05:48:58 +00:00
void fork_trampoline(void);
Further cleanup <machine/cpu.h> and <machine/md_var.h>: move the MI prototypes of cpu_halt(), cpu_reset() and swi_vm() from md_var.h to cpu.h. This affects db_command.c and kern_shutdown.c. ia64: move all MD prototypes from cpu.h to md_var.h. This affects madt.c, interrupt.c and mp_machdep.c. Remove is_physical_memory(). It's not used (vm_machdep.c). alpha: the MD prototypes have been left in cpu.h with a comment that they should be there. Moving them is left for later. It was expected that the impact would be significant enough to be done in a seperate commit. powerpc: MD prototypes left in cpu.h. Comment added. Suggested by: bde Tested with: make universe (pc98 incomplete)
2003-08-16 16:57:57 +00:00
void swi_vm(void *);
Add a consistent API to a feature that most modern CPUs have; a fast counter register in-CPU. This is to be used as a fast "timer", where linearity is more important than time, and multiple lines in the linearity caused by multiple CPUs in an SMP machine is not a problem. This adds no code whatsoever to the FreeBSD kernel until it is actually used, and then as a single-instruction inline routine (except for the 80386 and 80486 where it is some more inline code around nanotime(9). Reviewed by: bde, kris, jhb
2000-11-21 19:55:21 +00:00
/*
* Return contents of in-cpu fast counter as a sort of "bogo-time"
Make get_cyclecount() use binuptime() when no tsc is available: it is cheaper.
2003-02-05 08:55:10 +00:00
* for random-harvesting purposes.
Add a consistent API to a feature that most modern CPUs have; a fast counter register in-CPU. This is to be used as a fast "timer", where linearity is more important than time, and multiple lines in the linearity caused by multiple CPUs in an SMP machine is not a problem. This adds no code whatsoever to the FreeBSD kernel until it is actually used, and then as a single-instruction inline routine (except for the 80386 and 80486 where it is some more inline code around nanotime(9). Reviewed by: bde, kris, jhb
2000-11-21 19:55:21 +00:00
*/
Make get_cyclecount(9) little bit more useful where binuptime(9) is used.
2011-03-14 23:30:14 +00:00
static __inline uint64_t
Add a consistent API to a feature that most modern CPUs have; a fast counter register in-CPU. This is to be used as a fast "timer", where linearity is more important than time, and multiple lines in the linearity caused by multiple CPUs in an SMP machine is not a problem. This adds no code whatsoever to the FreeBSD kernel until it is actually used, and then as a single-instruction inline routine (except for the 80386 and 80486 where it is some more inline code around nanotime(9). Reviewed by: bde, kris, jhb
2000-11-21 19:55:21 +00:00
get_cyclecount(void)
{
Use cpu_ticks() for get_cyclecount(9) rather than checking existence of TSC at run-time on i386. cpu_ticks() is set to use RDTSC early enough on i386 where it is available. Otherwise, cpu_ticks() is driven by the current timecounter hardware as binuptime(9) does. This also avoids unnecessary namespace pollution from <machine/cputypes.h>.
2011-04-04 22:56:33 +00:00
return (cpu_ticks());
Add a consistent API to a feature that most modern CPUs have; a fast counter register in-CPU. This is to be used as a fast "timer", where linearity is more important than time, and multiple lines in the linearity caused by multiple CPUs in an SMP machine is not a problem. This adds no code whatsoever to the FreeBSD kernel until it is actually used, and then as a single-instruction inline routine (except for the 80386 and 80486 where it is some more inline code around nanotime(9). Reviewed by: bde, kris, jhb
2000-11-21 19:55:21 +00:00
}
All: Remove patch kit headers, and add $Id$ This is mostly to align some more code with NetBSD. cpu.h: Remove the old function vs. include configuration stuff that was ifdefed out when we went to inline functions. Remove the define of resettodr that made it a nop, there is already a function that makes it a nop, no need to #define one. Remove the #defines of processor types, they are now defined in cputypes.h, #include that file. Add struct cpu_nameclass for support of cpu types. frame.h: include sys/signal.h, it will be needed in the future. put the sigframe structure here that was in machdep.c pcb.h: Add multiple inclusion protection. Add pcb_ldt and pcb_ldt_len to pcb structure, this is for the user mode ldt.
1993-10-08 20:51:00 +00:00
#endif
Clean up #includes. <machine/spl.h> has to be included by almost everything in case an spl inline is used, so this is not the place to include it. Uniformize idempotency #ifdef.
1994-09-18 21:37:56 +00:00
#endif /* !_MACHINE_CPU_H_ */
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