3 * Common functions for OMAP4/5 based boards
6 * Texas Instruments, <www.ti.com>
9 * Aneesh V <aneesh@ti.com>
10 * Steve Sakoman <steve@sakoman.com>
12 * SPDX-License-Identifier: GPL-2.0+
16 #include <asm/cache.h>
18 DECLARE_GLOBAL_DATA_PTR;
21 * Without LPAE short descriptors are used
24 * The last 2 bits set to 0b10
28 * With LPAE cache configuration happens via MAIR0 register
29 * AttrIndx value is 0x3 for picking byte3 for MAIR0 which has 0xFF.
30 * 0xFF maps to Cache writeback with Read and Write Allocate set
31 * The bits[1:0] should have the value 0b01 for the first level
36 #ifdef CONFIG_ARMV7_LPAE
37 #define ARMV7_DCACHE_POLICY DCACHE_WRITEALLOC
39 #define ARMV7_DCACHE_POLICY DCACHE_WRITEBACK & ~TTB_SECT_XN_MASK
42 #define ARMV7_DOMAIN_CLIENT 1
43 #define ARMV7_DOMAIN_MASK (0x3 << 0)
45 void enable_caches(void)
47 /* Enable D-cache. I-cache is already enabled in start.S */
51 void dram_bank_mmu_setup(int bank)
56 u32 start = bd->bi_dram[bank].start >> MMU_SECTION_SHIFT;
57 u32 size = bd->bi_dram[bank].size >> MMU_SECTION_SHIFT;
58 u32 end = start + size;
60 debug("%s: bank: %d\n", __func__, bank);
61 for (i = start; i < end; i++)
62 set_section_dcache(i, ARMV7_DCACHE_POLICY);
65 void arm_init_domains(void)
71 * Set DOMAIN to client access so that all permissions
72 * set in pagetables are validated by the mmu.
74 reg &= ~ARMV7_DOMAIN_MASK;
75 reg |= ARMV7_DOMAIN_CLIENT;