Release 4.14 arch/m68k/hp300/time.c
// SPDX-License-Identifier: GPL-2.0
/*
* linux/arch/m68k/hp300/time.c
*
* Copyright (C) 1998 Philip Blundell <philb@gnu.org>
*
* This file contains the HP300-specific time handling code.
*/
#include <asm/ptrace.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/kernel_stat.h>
#include <linux/interrupt.h>
#include <asm/machdep.h>
#include <asm/irq.h>
#include <asm/io.h>
#include <asm/traps.h>
#include <asm/blinken.h>
/* Clock hardware definitions */
#define CLOCKBASE 0xf05f8000
#define CLKCR1 0x1
#define CLKCR2 0x3
#define CLKCR3 CLKCR1
#define CLKSR CLKCR2
#define CLKMSB1 0x5
#define CLKMSB2 0x9
#define CLKMSB3 0xD
/* This is for machines which generate the exact clock. */
#define USECS_PER_JIFFY (1000000/HZ)
#define INTVAL ((10000 / 4) - 1)
static irqreturn_t hp300_tick(int irq, void *dev_id)
{
unsigned long tmp;
irq_handler_t vector = dev_id;
in_8(CLOCKBASE + CLKSR);
asm volatile ("movpw %1@(5),%0" : "=d" (tmp) : "a" (CLOCKBASE));
/* Turn off the network and SCSI leds */
blinken_leds(0, 0xe0);
return vector(irq, NULL);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 33 | 68.75% | 1 | 16.67% |
| Geert Uytterhoeven | 12 | 25.00% | 3 | 50.00% |
| David Howells | 2 | 4.17% | 1 | 16.67% |
| Roman Zippel | 1 | 2.08% | 1 | 16.67% |
| Total | 48 | 100.00% | 6 | 100.00% |
u32 hp300_gettimeoffset(void)
{
/* Read current timer 1 value */
unsigned char lsb, msb1, msb2;
unsigned short ticks;
msb1 = in_8(CLOCKBASE + 5);
lsb = in_8(CLOCKBASE + 7);
msb2 = in_8(CLOCKBASE + 5);
if (msb1 != msb2)
/* A carry happened while we were reading. Read it again */
lsb = in_8(CLOCKBASE + 7);
ticks = INTVAL - ((msb2 << 8) | lsb);
return ((USECS_PER_JIFFY * ticks) / INTVAL) * 1000;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 81 | 90.00% | 1 | 33.33% |
| Stephen Warren | 5 | 5.56% | 1 | 33.33% |
| Geert Uytterhoeven | 4 | 4.44% | 1 | 33.33% |
| Total | 90 | 100.00% | 3 | 100.00% |
void __init hp300_sched_init(irq_handler_t vector)
{
out_8(CLOCKBASE + CLKCR2, 0x1); /* select CR1 */
out_8(CLOCKBASE + CLKCR1, 0x1); /* reset */
asm volatile(" movpw %0,%1@(5)" : : "d" (INTVAL), "a" (CLOCKBASE));
if (request_irq(IRQ_AUTO_6, hp300_tick, 0, "timer tick", vector))
pr_err("Couldn't register timer interrupt\n");
out_8(CLOCKBASE + CLKCR2, 0x1); /* select CR1 */
out_8(CLOCKBASE + CLKCR1, 0x40); /* enable irq */
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 49 | 68.06% | 3 | 37.50% |
| Geert Uytterhoeven | 20 | 27.78% | 3 | 37.50% |
| Roman Zippel | 2 | 2.78% | 1 | 12.50% |
| David Howells | 1 | 1.39% | 1 | 12.50% |
| Total | 72 | 100.00% | 8 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 238 | 82.93% | 3 | 23.08% |
| Geert Uytterhoeven | 37 | 12.89% | 5 | 38.46% |
| Stephen Warren | 5 | 1.74% | 1 | 7.69% |
| Roman Zippel | 3 | 1.05% | 2 | 15.38% |
| David Howells | 3 | 1.05% | 1 | 7.69% |
| Greg Kroah-Hartman | 1 | 0.35% | 1 | 7.69% |
| Total | 287 | 100.00% | 13 | 100.00% |
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