cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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clock-sh7710.c (1764B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 * arch/sh/kernel/cpu/sh3/clock-sh7710.c
      4 *
      5 * SH7710 support for the clock framework
      6 *
      7 *  Copyright (C) 2005  Paul Mundt
      8 *
      9 * FRQCR parsing hacked out of arch/sh/kernel/time.c
     10 *
     11 *  Copyright (C) 1999  Tetsuya Okada & Niibe Yutaka
     12 *  Copyright (C) 2000  Philipp Rumpf <prumpf@tux.org>
     13 *  Copyright (C) 2002, 2003, 2004  Paul Mundt
     14 *  Copyright (C) 2002  M. R. Brown  <mrbrown@linux-sh.org>
     15 */
     16#include <linux/init.h>
     17#include <linux/kernel.h>
     18#include <asm/clock.h>
     19#include <asm/freq.h>
     20#include <asm/io.h>
     21
     22static int md_table[] = { 1, 2, 3, 4, 6, 8, 12 };
     23
     24static void master_clk_init(struct clk *clk)
     25{
     26	clk->rate *= md_table[__raw_readw(FRQCR) & 0x0007];
     27}
     28
     29static struct sh_clk_ops sh7710_master_clk_ops = {
     30	.init		= master_clk_init,
     31};
     32
     33static unsigned long module_clk_recalc(struct clk *clk)
     34{
     35	int idx = (__raw_readw(FRQCR) & 0x0007);
     36	return clk->parent->rate / md_table[idx];
     37}
     38
     39static struct sh_clk_ops sh7710_module_clk_ops = {
     40	.recalc		= module_clk_recalc,
     41};
     42
     43static unsigned long bus_clk_recalc(struct clk *clk)
     44{
     45	int idx = (__raw_readw(FRQCR) & 0x0700) >> 8;
     46	return clk->parent->rate / md_table[idx];
     47}
     48
     49static struct sh_clk_ops sh7710_bus_clk_ops = {
     50	.recalc		= bus_clk_recalc,
     51};
     52
     53static unsigned long cpu_clk_recalc(struct clk *clk)
     54{
     55	int idx = (__raw_readw(FRQCR) & 0x0070) >> 4;
     56	return clk->parent->rate / md_table[idx];
     57}
     58
     59static struct sh_clk_ops sh7710_cpu_clk_ops = {
     60	.recalc		= cpu_clk_recalc,
     61};
     62
     63static struct sh_clk_ops *sh7710_clk_ops[] = {
     64	&sh7710_master_clk_ops,
     65	&sh7710_module_clk_ops,
     66	&sh7710_bus_clk_ops,
     67	&sh7710_cpu_clk_ops,
     68};
     69
     70void __init arch_init_clk_ops(struct sh_clk_ops **ops, int idx)
     71{
     72	if (idx < ARRAY_SIZE(sh7710_clk_ops))
     73		*ops = sh7710_clk_ops[idx];
     74}
     75