LXR linux/arch/sh/mm/cache-j2.c

   1/*
   2 * arch/sh/mm/cache-j2.c
   3 *
   4 * Copyright (C) 2015-2016 Smart Energy Instruments, Inc.
   5 *
   6 * Released under the terms of the GNU GPL v2.0.
   7 */
   8
   9#include <linux/init.h>
  10#include <linux/mm.h>
  11#include <linux/cpumask.h>
  12
  13#include <asm/cache.h>
  14#include <asm/addrspace.h>
  15#include <asm/processor.h>
  16#include <asm/cacheflush.h>
  17#include <asm/io.h>
  18
  19#define ICACHE_ENABLE   0x1
  20#define DCACHE_ENABLE   0x2
  21#define CACHE_ENABLE    (ICACHE_ENABLE | DCACHE_ENABLE)
  22#define ICACHE_FLUSH    0x100
  23#define DCACHE_FLUSH    0x200
  24#define CACHE_FLUSH     (ICACHE_FLUSH | DCACHE_FLUSH)
  25
  26u32 __iomem *j2_ccr_base;
  27
  28static void j2_flush_icache(void *args)
  29{
  30        unsigned cpu;
  31        for_each_possible_cpu(cpu)
  32                __raw_writel(CACHE_ENABLE | ICACHE_FLUSH, j2_ccr_base + cpu);
  33}
  34
  35static void j2_flush_dcache(void *args)
  36{
  37        unsigned cpu;
  38        for_each_possible_cpu(cpu)
  39                __raw_writel(CACHE_ENABLE | DCACHE_FLUSH, j2_ccr_base + cpu);
  40}
  41
  42static void j2_flush_both(void *args)
  43{
  44        unsigned cpu;
  45        for_each_possible_cpu(cpu)
  46                __raw_writel(CACHE_ENABLE | CACHE_FLUSH, j2_ccr_base + cpu);
  47}
  48
  49void __init j2_cache_init(void)
  50{
  51        if (!j2_ccr_base)
  52                return;
  53
  54        local_flush_cache_all = j2_flush_both;
  55        local_flush_cache_mm = j2_flush_both;
  56        local_flush_cache_dup_mm = j2_flush_both;
  57        local_flush_cache_page = j2_flush_both;
  58        local_flush_cache_range = j2_flush_both;
  59        local_flush_dcache_page = j2_flush_dcache;
  60        local_flush_icache_range = j2_flush_icache;
  61        local_flush_icache_page = j2_flush_icache;
  62        local_flush_cache_sigtramp = j2_flush_icache;
  63
  64        pr_info("Initial J2 CCR is %.8x\n", __raw_readl(j2_ccr_base));
  65}
  66