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7e4154a553
Enable the cache for all devices, unless CONFIG_SYS_DCACHE_OFF is defined. This speeds up the Beaglebone Black boot considerable. (Tested only on Beaglebone Black with SD card boot) Signed-off-by: Simon Glass <sjg@chromium.org>
57 lines
1.0 KiB
C
57 lines
1.0 KiB
C
/*
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*
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* Common functions for OMAP4/5 based boards
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*
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* (C) Copyright 2010
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* Texas Instruments, <www.ti.com>
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*
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* Author :
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* Aneesh V <aneesh@ti.com>
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* Steve Sakoman <steve@sakoman.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <asm/cache.h>
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DECLARE_GLOBAL_DATA_PTR;
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#define ARMV7_DCACHE_WRITEBACK 0xe
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#define ARMV7_DOMAIN_CLIENT 1
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#define ARMV7_DOMAIN_MASK (0x3 << 0)
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void enable_caches(void)
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{
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/* Enable D-cache. I-cache is already enabled in start.S */
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dcache_enable();
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}
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void dram_bank_mmu_setup(int bank)
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{
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bd_t *bd = gd->bd;
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int i;
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u32 start = bd->bi_dram[bank].start >> 20;
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u32 size = bd->bi_dram[bank].size >> 20;
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u32 end = start + size;
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debug("%s: bank: %d\n", __func__, bank);
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for (i = start; i < end; i++)
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set_section_dcache(i, ARMV7_DCACHE_WRITEBACK);
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}
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void arm_init_domains(void)
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{
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u32 reg;
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reg = get_dacr();
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/*
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* Set DOMAIN to client access so that all permissions
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* set in pagetables are validated by the mmu.
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*/
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reg &= ~ARMV7_DOMAIN_MASK;
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reg |= ARMV7_DOMAIN_CLIENT;
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set_dacr(reg);
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}
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