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/*
*
* Common functions for OMAP4/5 based boards
*
* (C) Copyright 2010
* Texas Instruments, <www.ti.com>
*
* Author :
* Aneesh V <aneesh@ti.com>
* Steve Sakoman <steve@sakoman.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/cache.h>
DECLARE_GLOBAL_DATA_PTR;
/*
* Without LPAE short descriptors are used
* Set C - Cache Bit3
* Set B - Buffer Bit2
* The last 2 bits set to 0b10
* Do Not set XN bit4
* So value is 0xe
*
* With LPAE cache configuration happens via MAIR0 register
* AttrIndx value is 0x3 for picking byte3 for MAIR0 which has 0xFF.
* 0xFF maps to Cache writeback with Read and Write Allocate set
* The bits[1:0] should have the value 0b01 for the first level
* descriptor.
* So the value is 0xd
*/
#ifdef CONFIG_ARMV7_LPAE
#define ARMV7_DCACHE_POLICY DCACHE_WRITEALLOC
#else
#define ARMV7_DCACHE_POLICY DCACHE_WRITEBACK & ~TTB_SECT_XN_MASK
#endif
#define ARMV7_DOMAIN_CLIENT 1
#define ARMV7_DOMAIN_MASK (0x3 << 0)
void enable_caches(void)
{
/* Enable D-cache. I-cache is already enabled in start.S */
dcache_enable();
}
void dram_bank_mmu_setup(int bank)
{
bd_t *bd = gd->bd;
int i;
u32 start = bd->bi_dram[bank].start >> MMU_SECTION_SHIFT;
u32 size = bd->bi_dram[bank].size >> MMU_SECTION_SHIFT;
u32 end = start + size;
debug("%s: bank: %d\n", __func__, bank);
for (i = start; i < end; i++)
set_section_dcache(i, ARMV7_DCACHE_POLICY);
}
void arm_init_domains(void)
{
u32 reg;
reg = get_dacr();
/*
* Set DOMAIN to client access so that all permissions
* set in pagetables are validated by the mmu.
*/
reg &= ~ARMV7_DOMAIN_MASK;
reg |= ARMV7_DOMAIN_CLIENT;
set_dacr(reg);
}
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