| /* |
| * Copyright (c) 2021-2022, 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> |
| |
| #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 == 0U) && ((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; |
| } |
| |
| 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; |
| } |
| |
| void emi_mpu_init(void) |
| { |
| struct emi_region_info_t region_info; |
| |
| /* SCP DRAM */ |
| region_info.start = 0x50000000ULL; |
| region_info.end = 0x5109FFFFULL; |
| region_info.region = 2; |
| SET_ACCESS_PERMISSION(region_info.apc, 1, |
| FORBIDDEN, FORBIDDEN, FORBIDDEN, FORBIDDEN, |
| FORBIDDEN, FORBIDDEN, FORBIDDEN, FORBIDDEN, |
| FORBIDDEN, FORBIDDEN, FORBIDDEN, NO_PROTECTION, |
| FORBIDDEN, FORBIDDEN, FORBIDDEN, NO_PROTECTION); |
| emi_mpu_set_protection(®ion_info); |
| |
| /* DSP protect address */ |
| region_info.start = 0x60000000ULL; /* dram base addr */ |
| region_info.end = 0x610FFFFFULL; |
| region_info.region = 3; |
| SET_ACCESS_PERMISSION(region_info.apc, 1, |
| FORBIDDEN, FORBIDDEN, FORBIDDEN, FORBIDDEN, |
| FORBIDDEN, FORBIDDEN, FORBIDDEN, FORBIDDEN, |
| FORBIDDEN, NO_PROTECTION, FORBIDDEN, FORBIDDEN, |
| FORBIDDEN, FORBIDDEN, FORBIDDEN, NO_PROTECTION); |
| emi_mpu_set_protection(®ion_info); |
| |
| /* Forbidden All */ |
| region_info.start = 0x40000000ULL; /* dram base addr */ |
| region_info.end = 0x1FFFF0000ULL; |
| region_info.region = 4; |
| SET_ACCESS_PERMISSION(region_info.apc, 1, |
| FORBIDDEN, FORBIDDEN, FORBIDDEN, FORBIDDEN, |
| FORBIDDEN, FORBIDDEN, FORBIDDEN, FORBIDDEN, |
| FORBIDDEN, FORBIDDEN, FORBIDDEN, FORBIDDEN, |
| FORBIDDEN, FORBIDDEN, FORBIDDEN, NO_PROTECTION); |
| emi_mpu_set_protection(®ion_info); |
| } |