LXR uboot/arch/powerpc/lib/cache.c

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * (C) Copyright 2002
   4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   5 */
   6
   7#include <common.h>
   8#include <asm/cache.h>
   9#include <watchdog.h>
  10
  11void flush_cache(ulong start_addr, ulong size)
  12{
  13#ifndef CONFIG_5xx
  14        ulong addr, start, end;
  15
  16        start = start_addr & ~(CONFIG_SYS_CACHELINE_SIZE - 1);
  17        end = start_addr + size - 1;
  18
  19        for (addr = start; (addr <= end) && (addr >= start);
  20                        addr += CONFIG_SYS_CACHELINE_SIZE) {
  21                asm volatile("dcbst 0,%0" : : "r" (addr) : "memory");
  22                WATCHDOG_RESET();
  23        }
  24        /* wait for all dcbst to complete on bus */
  25        asm volatile("sync" : : : "memory");
  26
  27        for (addr = start; (addr <= end) && (addr >= start);
  28                        addr += CONFIG_SYS_CACHELINE_SIZE) {
  29                asm volatile("icbi 0,%0" : : "r" (addr) : "memory");
  30                WATCHDOG_RESET();
  31        }
  32        asm volatile("sync" : : : "memory");
  33        /* flush prefetch queue */
  34        asm volatile("isync" : : : "memory");
  35#endif
  36}
  37