1 // SPDX-License-Identifier: GPL-2.0+
4 * Common functions for OMAP4/5 based boards
7 * Texas Instruments, <www.ti.com>
17 #include <asm/cache.h>
18 #include <asm/global_data.h>
20 DECLARE_GLOBAL_DATA_PTR;
23 * Without LPAE short descriptors are used
26 * The last 2 bits set to 0b10
30 * With LPAE cache configuration happens via MAIR0 register
31 * AttrIndx value is 0x3 for picking byte3 for MAIR0 which has 0xFF.
32 * 0xFF maps to Cache writeback with Read and Write Allocate set
33 * The bits[1:0] should have the value 0b01 for the first level
38 #ifdef CONFIG_ARMV7_LPAE
39 #define ARMV7_DCACHE_POLICY DCACHE_WRITEALLOC
41 #define ARMV7_DCACHE_POLICY DCACHE_WRITEBACK & ~TTB_SECT_XN_MASK
44 #define ARMV7_DOMAIN_CLIENT 1
45 #define ARMV7_DOMAIN_MASK (0x3 << 0)
47 void enable_caches(void)
50 /* Enable I cache if not enabled */
57 void dram_bank_mmu_setup(int bank)
59 struct bd_info *bd = gd->bd;
62 u32 start = bd->bi_dram[bank].start >> MMU_SECTION_SHIFT;
63 u32 size = bd->bi_dram[bank].size >> MMU_SECTION_SHIFT;
64 u32 end = start + size;
66 debug("%s: bank: %d\n", __func__, bank);
67 for (i = start; i < end; i++)
68 set_section_dcache(i, ARMV7_DCACHE_POLICY);
71 void arm_init_domains(void)
77 * Set DOMAIN to client access so that all permissions
78 * set in pagetables are validated by the mmu.
80 reg &= ~ARMV7_DOMAIN_MASK;
81 reg |= ARMV7_DOMAIN_CLIENT;