LXR uboot/arch/arm/cpu/armv7/omap-common/omap-cache.c

   1/*
   2 *
   3 * Common functions for OMAP4/5 based boards
   4 *
   5 * (C) Copyright 2010
   6 * Texas Instruments, <www.ti.com>
   7 *
   8 * Author :
   9 *      Aneesh V        <aneesh@ti.com>
  10 *      Steve Sakoman   <steve@sakoman.com>
  11 *
  12 * SPDX-License-Identifier:     GPL-2.0+
  13 */
  14
  15#include <common.h>
  16#include <asm/cache.h>
  17
  18DECLARE_GLOBAL_DATA_PTR;
  19
  20#define ARMV7_DCACHE_WRITEBACK  0xe
  21#define ARMV7_DOMAIN_CLIENT     1
  22#define ARMV7_DOMAIN_MASK       (0x3 << 0)
  23
  24void enable_caches(void)
  25{
  26        /* Enable D-cache. I-cache is already enabled in start.S */
  27        dcache_enable();
  28}
  29
  30void dram_bank_mmu_setup(int bank)
  31{
  32        bd_t *bd = gd->bd;
  33        int     i;
  34
  35        u32 start = bd->bi_dram[bank].start >> 20;
  36        u32 size = bd->bi_dram[bank].size >> 20;
  37        u32 end = start + size;
  38
  39        debug("%s: bank: %d\n", __func__, bank);
  40        for (i = start; i < end; i++)
  41                set_section_dcache(i, ARMV7_DCACHE_WRITEBACK);
  42}
  43
  44void arm_init_domains(void)
  45{
  46        u32 reg;
  47
  48        reg = get_dacr();
  49        /*
  50        * Set DOMAIN to client access so that all permissions
  51        * set in pagetables are validated by the mmu.
  52        */
  53        reg &= ~ARMV7_DOMAIN_MASK;
  54        reg |= ARMV7_DOMAIN_CLIENT;
  55        set_dacr(reg);
  56}
  57