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freebsd-dev/sys/powerpc/include/cpufunc.h

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This commit (along with one pending in sys/dev/ofw and one in sys/conf) give us our first minimal glimpse of PowerPC support. With this code we can get to the "mountroot>" prompt on my Apple iMac. We can't get any further due to lack of clock and interrupt handling, among other things. This does however mean that pmap and VM are initialising. We're fairly dependant on OpenFirmware at this point, but I hope to add support for other classes of firmware at a later stage. Reviewed by: obrien, dfr
2001-06-16 07:14:07 +00:00
/*-
* Copyright (c) 1998 Doug Rabson
* All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
* $FreeBSD$
*/
#ifndef _MACHINE_CPUFUNC_H_
#define _MACHINE_CPUFUNC_H_
#ifdef _KERNEL
#include <sys/types.h>
Fix the atomic_*_32 operations. These were written before I had the ability to test them properly and before I had a working knowledge of GCC asm constraints.
2001-06-27 12:17:23 +00:00
#include <machine/psl.h>
Compromise for critical*()/cpu_critical*() recommit. Cleanup the interrupt disablement assumptions in kern_fork.c by adding another API call, cpu_critical_fork_exit(). Cleanup the td_savecrit field by moving it from MI to MD. Temporarily move cpu_critical*() from <arch>/include/cpufunc.h to <arch>/<arch>/critical.c (stage-2 will clean this up). Implement interrupt deferral for i386 that allows interrupts to remain enabled inside critical sections. This also fixes an IPI interlock bug, and requires uses of icu_lock to be enclosed in a true interrupt disablement. This is the stage-1 commit. Stage-2 will occur after stage-1 has stabilized, and will move cpu_critical*() into its own header file(s) + other things. This commit may break non-i386 architectures in trivial ways. This should be temporary. Reviewed by: core Approved by: core
2002-03-27 05:39:23 +00:00
struct thread;
Modify the critical section API as follows: - The MD functions critical_enter/exit are renamed to start with a cpu_ prefix. - MI wrapper functions critical_enter/exit maintain a per-thread nesting count and a per-thread critical section saved state set when entering a critical section while at nesting level 0 and restored when exiting to nesting level 0. This moves the saved state out of spin mutexes so that interlocking spin mutexes works properly. - Most low-level MD code that used critical_enter/exit now use cpu_critical_enter/exit. MI code such as device drivers and spin mutexes use the MI wrappers. Note that since the MI wrappers store the state in the current thread, they do not have any return values or arguments. - mtx_intr_enable() is replaced with a constant CRITICAL_FORK which is assigned to curthread->td_savecrit during fork_exit(). Tested on: i386, alpha
2001-12-18 00:27:18 +00:00
This commit (along with one pending in sys/dev/ofw and one in sys/conf) give us our first minimal glimpse of PowerPC support. With this code we can get to the "mountroot>" prompt on my Apple iMac. We can't get any further due to lack of clock and interrupt handling, among other things. This does however mean that pmap and VM are initialising. We're fairly dependant on OpenFirmware at this point, but I hope to add support for other classes of firmware at a later stage. Reviewed by: obrien, dfr
2001-06-16 07:14:07 +00:00
#ifdef __GNUC__
static __inline void
breakpoint(void)
{
Minor style(9)'ing
2001-08-16 10:13:34 +00:00
This commit (along with one pending in sys/dev/ofw and one in sys/conf) give us our first minimal glimpse of PowerPC support. With this code we can get to the "mountroot>" prompt on my Apple iMac. We can't get any further due to lack of clock and interrupt handling, among other things. This does however mean that pmap and VM are initialising. We're fairly dependant on OpenFirmware at this point, but I hope to add support for other classes of firmware at a later stage. Reviewed by: obrien, dfr
2001-06-16 07:14:07 +00:00
return;
}
#endif
Fix the atomic_*_32 operations. These were written before I had the ability to test them properly and before I had a working knowledge of GCC asm constraints.
2001-06-27 12:17:23 +00:00
/* CPU register mangling inlines */
static __inline void
- Make all inlines for manipulating supervisor-level registers accept/return register_t values. - Implement an inline for isync.
2002-03-21 13:07:31 +00:00
mtmsr(register_t value)
Fix the atomic_*_32 operations. These were written before I had the ability to test them properly and before I had a working knowledge of GCC asm constraints.
2001-06-27 12:17:23 +00:00
{
Minor style(9)'ing
2001-08-16 10:13:34 +00:00
Fix the atomic_*_32 operations. These were written before I had the ability to test them properly and before I had a working knowledge of GCC asm constraints.
2001-06-27 12:17:23 +00:00
__asm __volatile ("mtmsr %0" :: "r"(value));
}
- Make all inlines for manipulating supervisor-level registers accept/return register_t values. - Implement an inline for isync.
2002-03-21 13:07:31 +00:00
static __inline register_t
Fix the atomic_*_32 operations. These were written before I had the ability to test them properly and before I had a working knowledge of GCC asm constraints.
2001-06-27 12:17:23 +00:00
mfmsr(void)
{
- Make all inlines for manipulating supervisor-level registers accept/return register_t values. - Implement an inline for isync.
2002-03-21 13:07:31 +00:00
register_t value;
Fix the atomic_*_32 operations. These were written before I had the ability to test them properly and before I had a working knowledge of GCC asm constraints.
2001-06-27 12:17:23 +00:00
__asm __volatile ("mfmsr %0" : "=r"(value));
return (value);
}
static __inline void
- Make all inlines for manipulating supervisor-level registers accept/return register_t values. - Implement an inline for isync.
2002-03-21 13:07:31 +00:00
mtdec(register_t value)
Fix the atomic_*_32 operations. These were written before I had the ability to test them properly and before I had a working knowledge of GCC asm constraints.
2001-06-27 12:17:23 +00:00
{
Minor style(9)'ing
2001-08-16 10:13:34 +00:00
Fix the atomic_*_32 operations. These were written before I had the ability to test them properly and before I had a working knowledge of GCC asm constraints.
2001-06-27 12:17:23 +00:00
__asm __volatile ("mtdec %0" :: "r"(value));
}
- Make all inlines for manipulating supervisor-level registers accept/return register_t values. - Implement an inline for isync.
2002-03-21 13:07:31 +00:00
static __inline register_t
Fix the atomic_*_32 operations. These were written before I had the ability to test them properly and before I had a working knowledge of GCC asm constraints.
2001-06-27 12:17:23 +00:00
mfdec(void)
{
- Make all inlines for manipulating supervisor-level registers accept/return register_t values. - Implement an inline for isync.
2002-03-21 13:07:31 +00:00
register_t value;
Fix the atomic_*_32 operations. These were written before I had the ability to test them properly and before I had a working knowledge of GCC asm constraints.
2001-06-27 12:17:23 +00:00
__asm __volatile ("mfdec %0" : "=r"(value));
return (value);
}
- Make all inlines for manipulating supervisor-level registers accept/return register_t values. - Implement an inline for isync.
2002-03-21 13:07:31 +00:00
static __inline void
isync(void)
{
__asm __volatile ("isync");
}
GC some unused, bogus interrupt functions and replace them with proper implementations of intr_disable and intr_restore.
2002-03-21 12:04:58 +00:00
static __inline register_t
intr_disable(void)
This commit (along with one pending in sys/dev/ofw and one in sys/conf) give us our first minimal glimpse of PowerPC support. With this code we can get to the "mountroot>" prompt on my Apple iMac. We can't get any further due to lack of clock and interrupt handling, among other things. This does however mean that pmap and VM are initialising. We're fairly dependant on OpenFirmware at this point, but I hope to add support for other classes of firmware at a later stage. Reviewed by: obrien, dfr
2001-06-16 07:14:07 +00:00
{
GC some unused, bogus interrupt functions and replace them with proper implementations of intr_disable and intr_restore.
2002-03-21 12:04:58 +00:00
register_t msr;
This commit (along with one pending in sys/dev/ofw and one in sys/conf) give us our first minimal glimpse of PowerPC support. With this code we can get to the "mountroot>" prompt on my Apple iMac. We can't get any further due to lack of clock and interrupt handling, among other things. This does however mean that pmap and VM are initialising. We're fairly dependant on OpenFirmware at this point, but I hope to add support for other classes of firmware at a later stage. Reviewed by: obrien, dfr
2001-06-16 07:14:07 +00:00
Fix the atomic_*_32 operations. These were written before I had the ability to test them properly and before I had a working knowledge of GCC asm constraints.
2001-06-27 12:17:23 +00:00
msr = mfmsr();
- When enabling/disabling interrupts, set/clear both PSL_EE and PSL_RI, not just PSL_EE. - Make cpu_critical_enter/exit independant of save_intr/restore_intr.
2002-02-28 03:07:48 +00:00
mtmsr(msr & ~(PSL_EE|PSL_RI));
GC some unused, bogus interrupt functions and replace them with proper implementations of intr_disable and intr_restore.
2002-03-21 12:04:58 +00:00
return (msr);
This commit (along with one pending in sys/dev/ofw and one in sys/conf) give us our first minimal glimpse of PowerPC support. With this code we can get to the "mountroot>" prompt on my Apple iMac. We can't get any further due to lack of clock and interrupt handling, among other things. This does however mean that pmap and VM are initialising. We're fairly dependant on OpenFirmware at this point, but I hope to add support for other classes of firmware at a later stage. Reviewed by: obrien, dfr
2001-06-16 07:14:07 +00:00
}
static __inline void
GC some unused, bogus interrupt functions and replace them with proper implementations of intr_disable and intr_restore.
2002-03-21 12:04:58 +00:00
intr_restore(register_t msr)
This commit (along with one pending in sys/dev/ofw and one in sys/conf) give us our first minimal glimpse of PowerPC support. With this code we can get to the "mountroot>" prompt on my Apple iMac. We can't get any further due to lack of clock and interrupt handling, among other things. This does however mean that pmap and VM are initialising. We're fairly dependant on OpenFirmware at this point, but I hope to add support for other classes of firmware at a later stage. Reviewed by: obrien, dfr
2001-06-16 07:14:07 +00:00
{
GC some unused, bogus interrupt functions and replace them with proper implementations of intr_disable and intr_restore.
2002-03-21 12:04:58 +00:00
mtmsr(msr);
This commit (along with one pending in sys/dev/ofw and one in sys/conf) give us our first minimal glimpse of PowerPC support. With this code we can get to the "mountroot>" prompt on my Apple iMac. We can't get any further due to lack of clock and interrupt handling, among other things. This does however mean that pmap and VM are initialising. We're fairly dependant on OpenFirmware at this point, but I hope to add support for other classes of firmware at a later stage. Reviewed by: obrien, dfr
2001-06-16 07:14:07 +00:00
}
static __inline void
Fix the atomic_*_32 operations. These were written before I had the ability to test them properly and before I had a working knowledge of GCC asm constraints.
2001-06-27 12:17:23 +00:00
restore_intr(unsigned int msr)
This commit (along with one pending in sys/dev/ofw and one in sys/conf) give us our first minimal glimpse of PowerPC support. With this code we can get to the "mountroot>" prompt on my Apple iMac. We can't get any further due to lack of clock and interrupt handling, among other things. This does however mean that pmap and VM are initialising. We're fairly dependant on OpenFirmware at this point, but I hope to add support for other classes of firmware at a later stage. Reviewed by: obrien, dfr
2001-06-16 07:14:07 +00:00
{
Minor style(9)'ing
2001-08-16 10:13:34 +00:00
Fix the atomic_*_32 operations. These were written before I had the ability to test them properly and before I had a working knowledge of GCC asm constraints.
2001-06-27 12:17:23 +00:00
mtmsr(msr);
This commit (along with one pending in sys/dev/ofw and one in sys/conf) give us our first minimal glimpse of PowerPC support. With this code we can get to the "mountroot>" prompt on my Apple iMac. We can't get any further due to lack of clock and interrupt handling, among other things. This does however mean that pmap and VM are initialising. We're fairly dependant on OpenFirmware at this point, but I hope to add support for other classes of firmware at a later stage. Reviewed by: obrien, dfr
2001-06-16 07:14:07 +00:00
}
static __inline void
powerpc_mb(void)
{
Minor style(9)'ing
2001-08-16 10:13:34 +00:00
Fix the atomic_*_32 operations. These were written before I had the ability to test them properly and before I had a working knowledge of GCC asm constraints.
2001-06-27 12:17:23 +00:00
__asm __volatile("eieio; sync" : : : "memory");
This commit (along with one pending in sys/dev/ofw and one in sys/conf) give us our first minimal glimpse of PowerPC support. With this code we can get to the "mountroot>" prompt on my Apple iMac. We can't get any further due to lack of clock and interrupt handling, among other things. This does however mean that pmap and VM are initialising. We're fairly dependant on OpenFirmware at this point, but I hope to add support for other classes of firmware at a later stage. Reviewed by: obrien, dfr
2001-06-16 07:14:07 +00:00
}
Overhaul the per-CPU support a bit: - The MI portions of struct globaldata have been consolidated into a MI struct pcpu. The MD per-CPU data are specified via a macro defined in machine/pcpu.h. A macro was chosen over a struct mdpcpu so that the interface would be cleaner (PCPU_GET(my_md_field) vs. PCPU_GET(md.md_my_md_field)). - All references to globaldata are changed to pcpu instead. In a UP kernel, this data was stored as global variables which is where the original name came from. In an SMP world this data is per-CPU and ideally private to each CPU outside of the context of debuggers. This also included combining machine/globaldata.h and machine/globals.h into machine/pcpu.h. - The pointer to the thread using the FPU on i386 was renamed from npxthread to fpcurthread to be identical with other architectures. - Make the show pcpu ddb command MI with a MD callout to display MD fields. - The globaldata_register() function was renamed to pcpu_init() and now init's MI fields of a struct pcpu in addition to registering it with the internal array and list. - A pcpu_destroy() function was added to remove a struct pcpu from the internal array and list. Tested on: alpha, i386 Reviewed by: peter, jake
2001-12-11 23:33:44 +00:00
static __inline struct pcpu *
powerpc_get_pcpup(void)
This commit (along with one pending in sys/dev/ofw and one in sys/conf) give us our first minimal glimpse of PowerPC support. With this code we can get to the "mountroot>" prompt on my Apple iMac. We can't get any further due to lack of clock and interrupt handling, among other things. This does however mean that pmap and VM are initialising. We're fairly dependant on OpenFirmware at this point, but I hope to add support for other classes of firmware at a later stage. Reviewed by: obrien, dfr
2001-06-16 07:14:07 +00:00
{
Overhaul the per-CPU support a bit: - The MI portions of struct globaldata have been consolidated into a MI struct pcpu. The MD per-CPU data are specified via a macro defined in machine/pcpu.h. A macro was chosen over a struct mdpcpu so that the interface would be cleaner (PCPU_GET(my_md_field) vs. PCPU_GET(md.md_my_md_field)). - All references to globaldata are changed to pcpu instead. In a UP kernel, this data was stored as global variables which is where the original name came from. In an SMP world this data is per-CPU and ideally private to each CPU outside of the context of debuggers. This also included combining machine/globaldata.h and machine/globals.h into machine/pcpu.h. - The pointer to the thread using the FPU on i386 was renamed from npxthread to fpcurthread to be identical with other architectures. - Make the show pcpu ddb command MI with a MD callout to display MD fields. - The globaldata_register() function was renamed to pcpu_init() and now init's MI fields of a struct pcpu in addition to registering it with the internal array and list. - A pcpu_destroy() function was added to remove a struct pcpu from the internal array and list. Tested on: alpha, i386 Reviewed by: peter, jake
2001-12-11 23:33:44 +00:00
struct pcpu *ret;
This commit (along with one pending in sys/dev/ofw and one in sys/conf) give us our first minimal glimpse of PowerPC support. With this code we can get to the "mountroot>" prompt on my Apple iMac. We can't get any further due to lack of clock and interrupt handling, among other things. This does however mean that pmap and VM are initialising. We're fairly dependant on OpenFirmware at this point, but I hope to add support for other classes of firmware at a later stage. Reviewed by: obrien, dfr
2001-06-16 07:14:07 +00:00
Fix the atomic_*_32 operations. These were written before I had the ability to test them properly and before I had a working knowledge of GCC asm constraints.
2001-06-27 12:17:23 +00:00
__asm ("mfsprg %0, 0" : "=r"(ret));
This commit (along with one pending in sys/dev/ofw and one in sys/conf) give us our first minimal glimpse of PowerPC support. With this code we can get to the "mountroot>" prompt on my Apple iMac. We can't get any further due to lack of clock and interrupt handling, among other things. This does however mean that pmap and VM are initialising. We're fairly dependant on OpenFirmware at this point, but I hope to add support for other classes of firmware at a later stage. Reviewed by: obrien, dfr
2001-06-16 07:14:07 +00:00
return(ret);
}
#endif /* _KERNEL */
#endif /* !_MACHINE_CPUFUNC_H_ */
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