freebsd-nq/sys/powerpc/include/clock.h

/*-
 * Kernel interface to machine-dependent clock driver.
 * Garrett Wollman, September 1994.
 * This file is in the public domain.
 *
 * $FreeBSD$
 */

#ifndef _MACHINE_CLOCK_H_
#define	_MACHINE_CLOCK_H_

#ifdef _KERNEL

struct trapframe;

void	decr_intr(struct trapframe *);

#endif

#endif /* !_MACHINE_CLOCK_H_ */
/* -> /*- for license, minor formatting changes 2005-01-07 02:29:27 +00:00			`/*-`
Add initial support for the FreeBSD/alpha kernel. This is very much a work in progress and has never booted a real machine. Initial development and testing was done using SimOS (see http://simos.stanford.edu for details). On the SimOS simulator, this port successfully reaches single-user mode and has been tested with loads as high as one copy of /bin/ls :-). Obtained from: partly from NetBSD/alpha 1998-06-10 10:57:29 +00:00			`* Kernel interface to machine-dependent clock driver.`
			`* Garrett Wollman, September 1994.`
			`* This file is in the public domain.`
			`*`
$Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00			`* $FreeBSD$`
Add initial support for the FreeBSD/alpha kernel. This is very much a work in progress and has never booted a real machine. Initial development and testing was done using SimOS (see http://simos.stanford.edu for details). On the SimOS simulator, this port successfully reaches single-user mode and has been tested with loads as high as one copy of /bin/ls :-). Obtained from: partly from NetBSD/alpha 1998-06-10 10:57:29 +00:00			`*/`

			`#ifndef _MACHINE_CLOCK_H_`
			`#define _MACHINE_CLOCK_H_`

Change #ifdef KERNEL to #ifdef _KERNEL in the public headers. "KERNEL" is an application space macro and the applications are supposed to be free to use it as they please (but cannot). This is consistant with the other BSD's who made this change quite some time ago. More commits to come. 1999-12-29 04:46:21 +00:00			`#ifdef _KERNEL`
Add initial support for the FreeBSD/alpha kernel. This is very much a work in progress and has never booted a real machine. Initial development and testing was done using SimOS (see http://simos.stanford.edu for details). On the SimOS simulator, this port successfully reaches single-user mode and has been tested with loads as high as one copy of /bin/ls :-). Obtained from: partly from NetBSD/alpha 1998-06-10 10:57:29 +00:00
Forward-declare struct trapframe to allow the aic module to compile. 2005-12-24 08:27:45 +00:00			`struct trapframe;`

Tweak how the MD code calls the fooclock() methods some. Instead of passing a pointer to an opaque clockframe structure and requiring the MD code to supply CLKF_FOO() macros to extract needed values out of the opaque structure, just pass the needed values directly. In practice this means passing the pair (usermode, pc) to hardclock() and profclock() and passing the boolean (usermode) to hardclock_cpu() and hardclock_process(). Other details: - Axe clockframe and CLKF_FOO() macros on all architectures. Basically, all the archs were taking a trapframe and converting it into a clockframe one way or another. Now they can just extract the PC and usermode values directly out of the trapframe and pass it to fooclock(). - Renamed hardclock_process() to hardclock_cpu() as the latter is more accurate. - On Alpha, we now run profclock() at hz (profhz == hz) rather than at the slower stathz. - On Alpha, for the TurboLaser machines that don't have an 8254 timecounter, call hardclock() directly. This removes an extra conditional check from every clock interrupt on Alpha on the BSP. There is probably room for even further pruning here by changing Alpha to use the simplified timecounter we use on x86 with the lapic timer since we don't get interrupts from the 8254 on Alpha anyway. - On x86, clkintr() shouldn't ever be called now unless using_lapic_timer is false, so add a KASSERT() to that affect and remove a condition to slightly optimize the non-lapic case. - Change prototypeof arm_handler_execute() so that it's first arg is a trapframe pointer rather than a void pointer for clarity. - Use KCOUNT macro in profclock() to lookup the kernel profiling bucket. Tested on: alpha, amd64, arm, i386, ia64, sparc64 Reviewed by: bde (mostly) 2005-12-22 22:16:09 +00:00			`void decr_intr(struct trapframe *);`
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
Change #ifdef KERNEL to #ifdef _KERNEL in the public headers. "KERNEL" is an application space macro and the applications are supposed to be free to use it as they please (but cannot). This is consistant with the other BSD's who made this change quite some time ago. More commits to come. 1999-12-29 04:46:21 +00:00			`#endif`
Add initial support for the FreeBSD/alpha kernel. This is very much a work in progress and has never booted a real machine. Initial development and testing was done using SimOS (see http://simos.stanford.edu for details). On the SimOS simulator, this port successfully reaches single-user mode and has been tested with loads as high as one copy of /bin/ls :-). Obtained from: partly from NetBSD/alpha 1998-06-10 10:57:29 +00:00
			`#endif /* !_MACHINE_CLOCK_H_ */`