1 /* 2 * Copyright (C) 2018 Marvell International Ltd. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 * https://spdx.org/licenses 6 */ 7 8 #include <common/debug.h> 9 #include <drivers/marvell/addr_map.h> 10 #include <lib/mmio.h> 11 12 #include <mvebu_def.h> 13 14 #include "mc_trustzone.h" 15 16 #define TZ_SIZE(x) ((x) >> 13) 17 18 static int fls(int x) 19 { 20 if (!x) 21 return 0; 22 23 return 32 - __builtin_clz(x); 24 } 25 26 /* To not duplicate types, the addr_map_win is used, but the "target" 27 * filed is referring to attributes instead of "target". 28 */ 29 void tz_enable_win(int ap_index, const struct addr_map_win *win, int win_id) 30 { 31 int tz_size; 32 uint32_t val, base = win->base_addr; 33 34 if ((win_id < 0) || (win_id > MVEBU_TZ_MAX_WINS)) { 35 ERROR("Enabling wrong MC TrustZone window %d!\n", win_id); 36 return; 37 } 38 39 /* map the window size to trustzone register convention */ 40 tz_size = fls(TZ_SIZE(win->win_size)); 41 42 VERBOSE("%s: window size = 0x%llx maps to tz_size %d\n", 43 __func__, win->win_size, tz_size); 44 if (tz_size < 0 || tz_size > 31) { 45 ERROR("Using not allowed size for MC TrustZone window %d!\n", 46 win_id); 47 return; 48 } 49 50 if (base & 0xfff) { 51 base = base & ~0xfff; 52 WARN("Attempt to open MC TZ win. at 0x%llx, truncate to 0x%x\n", 53 win->base_addr, base); 54 } 55 56 val = base | (tz_size << 7) | win->target_id | TZ_VALID; 57 58 VERBOSE("%s: base 0x%x, tz_size moved 0x%x, attr 0x%x, val 0x%x\n", 59 __func__, base, (tz_size << 7), win->target_id, val); 60 61 mmio_write_32(MVEBU_AP_MC_TRUSTZONE_REG_LOW(ap_index, win_id), val); 62 63 VERBOSE("%s: Win%d[0x%x] configured to 0x%x\n", __func__, win_id, 64 MVEBU_AP_MC_TRUSTZONE_REG_LOW(ap_index, win_id), 65 mmio_read_32(MVEBU_AP_MC_TRUSTZONE_REG_LOW(ap_index, win_id))); 66 67 mmio_write_32(MVEBU_AP_MC_TRUSTZONE_REG_HIGH(ap_index, win_id), 68 (win->base_addr >> 32)); 69 70 VERBOSE("%s: Win%d[0x%x] configured to 0x%x\n", __func__, win_id, 71 MVEBU_AP_MC_TRUSTZONE_REG_HIGH(ap_index, win_id), 72 mmio_read_32(MVEBU_AP_MC_TRUSTZONE_REG_HIGH(ap_index, win_id))); 73 } 74