| /* |
| * Copyright (c) 2022, ARM Limited and Contributors. All rights reserved. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| #include <string.h> |
| #include <common/debug.h> |
| #include <lib/mmio.h> |
| #include <emi_mpu.h> |
| #include <lib/mtk_init/mtk_init.h> |
| |
| #if ENABLE_EMI_MPU_SW_LOCK |
| static unsigned char region_lock_state[EMI_MPU_REGION_NUM]; |
| #endif |
| |
| #define EMI_MPU_START_MASK (0x00FFFFFF) |
| #define EMI_MPU_END_MASK (0x00FFFFFF) |
| #define EMI_MPU_APC_SW_LOCK_MASK (0x00FFFFFF) |
| #define EMI_MPU_APC_HW_LOCK_MASK (0x80FFFFFF) |
| |
| static int _emi_mpu_set_protection(unsigned int start, unsigned int end, |
| unsigned int apc) |
| { |
| unsigned int dgroup; |
| unsigned int region; |
| |
| region = (start >> 24) & 0xFF; |
| start &= EMI_MPU_START_MASK; |
| dgroup = (end >> 24) & 0xFF; |
| end &= EMI_MPU_END_MASK; |
| |
| if ((region >= EMI_MPU_REGION_NUM) || (dgroup > EMI_MPU_DGROUP_NUM)) { |
| WARN("invalid region, domain\n"); |
| return -1; |
| } |
| |
| #if ENABLE_EMI_MPU_SW_LOCK |
| if (region_lock_state[region] == 1) { |
| WARN("invalid region\n"); |
| return -1; |
| } |
| |
| if ((dgroup == 0) && ((apc >> 31) & 0x1)) { |
| region_lock_state[region] = 1; |
| } |
| |
| apc &= EMI_MPU_APC_SW_LOCK_MASK; |
| #else |
| apc &= EMI_MPU_APC_HW_LOCK_MASK; |
| #endif |
| |
| if ((start >= DRAM_OFFSET) && (end >= start)) { |
| start -= DRAM_OFFSET; |
| end -= DRAM_OFFSET; |
| } else { |
| WARN("invalid range\n"); |
| return -1; |
| } |
| |
| mmio_write_32(EMI_MPU_SA(region), start); |
| mmio_write_32(EMI_MPU_EA(region), end); |
| mmio_write_32(EMI_MPU_APC(region, dgroup), apc); |
| |
| #if defined(SUB_EMI_MPU_BASE) |
| mmio_write_32(SUB_EMI_MPU_SA(region), start); |
| mmio_write_32(SUB_EMI_MPU_EA(region), end); |
| mmio_write_32(SUB_EMI_MPU_APC(region, dgroup), apc); |
| #endif |
| return 0; |
| } |
| |
| static void dump_emi_mpu_regions(void) |
| { |
| int region, i; |
| |
| /* Only dump 8 regions(max: EMI_MPU_REGION_NUM --> 32) */ |
| for (region = 0; region < 8; ++region) { |
| INFO("region %d:\n", region); |
| INFO("\tsa: 0x%x, ea: 0x%x\n", |
| mmio_read_32(EMI_MPU_SA(region)), mmio_read_32(EMI_MPU_EA(region))); |
| |
| for (i = 0; i < EMI_MPU_DGROUP_NUM; ++i) { |
| INFO("\tapc%d: 0x%x\n", i, mmio_read_32(EMI_MPU_APC(region, i))); |
| } |
| } |
| } |
| |
| int emi_mpu_set_protection(struct emi_region_info_t *region_info) |
| { |
| unsigned int start, end; |
| int i; |
| |
| if (region_info->region >= EMI_MPU_REGION_NUM) { |
| WARN("invalid region\n"); |
| return -1; |
| } |
| |
| start = (unsigned int)(region_info->start >> EMI_MPU_ALIGN_BITS) | |
| (region_info->region << 24); |
| |
| for (i = EMI_MPU_DGROUP_NUM - 1; i >= 0; i--) { |
| end = (unsigned int)(region_info->end >> EMI_MPU_ALIGN_BITS) | (i << 24); |
| |
| if (_emi_mpu_set_protection(start, end, region_info->apc[i]) < 0) { |
| WARN("Failed to set emi mpu protection(%d, %d, %d)\n", |
| start, end, region_info->apc[i]); |
| } |
| } |
| |
| return 0; |
| } |
| |
| int emi_mpu_init(void) |
| { |
| INFO("[%s] emi mpu initialization\n", __func__); |
| |
| set_emi_mpu_regions(); |
| dump_emi_mpu_regions(); |
| |
| return 0; |
| } |
| MTK_PLAT_SETUP_0_INIT(emi_mpu_init); |