mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-30 06:56:46 +07:00
66d857b08b
There is a lot of common code that could be shared between the m68k and m68knommu arch branches. It makes sense to merge the two branches into a single directory structure so that we can more easily share that common code. This is a brute force merge, based on a script from Stephen King <sfking@fdwdc.com>, which was originally written by Arnd Bergmann <arnd@arndb.de>. > The script was inspired by the script Sam Ravnborg used to merge the > includes from m68knommu. For those files common to both arches but > differing in content, the m68k version of the file is renamed to > <file>_mm.<ext> and the m68knommu version of the file is moved into the > corresponding m68k directory and renamed <file>_no.<ext> and a small > wrapper file <file>.<ext> is used to select between the two version. Files > that are common to both but don't differ are removed from the m68knommu > tree and files and directories that are unique to the m68knommu tree are > moved to the m68k tree. Finally, the arch/m68knommu tree is removed. > > To select between the the versions of the files, the wrapper uses > > #ifdef CONFIG_MMU > #include <file>_mm.<ext> > #else > #include <file>_no.<ext> > #endif On top of this file merge I have done a simplistic merge of m68k and m68knommu Kconfig, which primarily attempts to keep existing options and menus in place. Other than a handful of options being moved it produces identical .config outputs on m68k and m68knommu targets I tested it on. With this in place there is now quite a bit of scope for merge cleanups in future patches. Signed-off-by: Greg Ungerer <gerg@uclinux.org>
115 lines
2.6 KiB
C
115 lines
2.6 KiB
C
/*
|
|
* linux/arch/m68k/kernel/time.c
|
|
*
|
|
* Copyright (C) 1991, 1992, 1995 Linus Torvalds
|
|
*
|
|
* This file contains the m68k-specific time handling details.
|
|
* Most of the stuff is located in the machine specific files.
|
|
*
|
|
* 1997-09-10 Updated NTP code according to technical memorandum Jan '96
|
|
* "A Kernel Model for Precision Timekeeping" by Dave Mills
|
|
*/
|
|
|
|
#include <linux/errno.h>
|
|
#include <linux/module.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/param.h>
|
|
#include <linux/string.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/rtc.h>
|
|
#include <linux/platform_device.h>
|
|
|
|
#include <asm/machdep.h>
|
|
#include <asm/io.h>
|
|
#include <asm/irq_regs.h>
|
|
|
|
#include <linux/time.h>
|
|
#include <linux/timex.h>
|
|
#include <linux/profile.h>
|
|
|
|
static inline int set_rtc_mmss(unsigned long nowtime)
|
|
{
|
|
if (mach_set_clock_mmss)
|
|
return mach_set_clock_mmss (nowtime);
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* timer_interrupt() needs to keep up the real-time clock,
|
|
* as well as call the "xtime_update()" routine every clocktick
|
|
*/
|
|
static irqreturn_t timer_interrupt(int irq, void *dummy)
|
|
{
|
|
xtime_update(1);
|
|
update_process_times(user_mode(get_irq_regs()));
|
|
profile_tick(CPU_PROFILING);
|
|
|
|
#ifdef CONFIG_HEARTBEAT
|
|
/* use power LED as a heartbeat instead -- much more useful
|
|
for debugging -- based on the version for PReP by Cort */
|
|
/* acts like an actual heart beat -- ie thump-thump-pause... */
|
|
if (mach_heartbeat) {
|
|
static unsigned cnt = 0, period = 0, dist = 0;
|
|
|
|
if (cnt == 0 || cnt == dist)
|
|
mach_heartbeat( 1 );
|
|
else if (cnt == 7 || cnt == dist+7)
|
|
mach_heartbeat( 0 );
|
|
|
|
if (++cnt > period) {
|
|
cnt = 0;
|
|
/* The hyperbolic function below modifies the heartbeat period
|
|
* length in dependency of the current (5min) load. It goes
|
|
* through the points f(0)=126, f(1)=86, f(5)=51,
|
|
* f(inf)->30. */
|
|
period = ((672<<FSHIFT)/(5*avenrun[0]+(7<<FSHIFT))) + 30;
|
|
dist = period / 4;
|
|
}
|
|
}
|
|
#endif /* CONFIG_HEARTBEAT */
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
void read_persistent_clock(struct timespec *ts)
|
|
{
|
|
struct rtc_time time;
|
|
ts->tv_sec = 0;
|
|
ts->tv_nsec = 0;
|
|
|
|
if (mach_hwclk) {
|
|
mach_hwclk(0, &time);
|
|
|
|
if ((time.tm_year += 1900) < 1970)
|
|
time.tm_year += 100;
|
|
ts->tv_sec = mktime(time.tm_year, time.tm_mon, time.tm_mday,
|
|
time.tm_hour, time.tm_min, time.tm_sec);
|
|
}
|
|
}
|
|
|
|
void __init time_init(void)
|
|
{
|
|
mach_sched_init(timer_interrupt);
|
|
}
|
|
|
|
u32 arch_gettimeoffset(void)
|
|
{
|
|
return mach_gettimeoffset() * 1000;
|
|
}
|
|
|
|
static int __init rtc_init(void)
|
|
{
|
|
struct platform_device *pdev;
|
|
|
|
if (!mach_hwclk)
|
|
return -ENODEV;
|
|
|
|
pdev = platform_device_register_simple("rtc-generic", -1, NULL, 0);
|
|
if (IS_ERR(pdev))
|
|
return PTR_ERR(pdev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
module_init(rtc_init);
|