74 lines
1.9 KiB
C
74 lines
1.9 KiB
C
/*
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* Copyright (C) 2018 Marvell International Ltd.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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* https://spdx.org/licenses
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*/
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#include <common/debug.h>
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#include <drivers/marvell/addr_map.h>
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#include <lib/mmio.h>
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#include <mvebu_def.h>
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#include "mc_trustzone.h"
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#define TZ_SIZE(x) ((x) >> 13)
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static int fls(int x)
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{
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if (!x)
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return 0;
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return 32 - __builtin_clz(x);
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}
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/* To not duplicate types, the addr_map_win is used, but the "target"
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* filed is referring to attributes instead of "target".
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*/
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void tz_enable_win(int ap_index, const struct addr_map_win *win, int win_id)
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{
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int tz_size;
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uint32_t val, base = win->base_addr;
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if ((win_id < 0) || (win_id > MVEBU_TZ_MAX_WINS)) {
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ERROR("Enabling wrong MC TrustZone window %d!\n", win_id);
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return;
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}
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/* map the window size to trustzone register convention */
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tz_size = fls(TZ_SIZE(win->win_size));
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VERBOSE("%s: window size = 0x%llx maps to tz_size %d\n",
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__func__, win->win_size, tz_size);
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if (tz_size < 0 || tz_size > 31) {
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ERROR("Using not allowed size for MC TrustZone window %d!\n",
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win_id);
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return;
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}
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if (base & 0xfff) {
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base = base & ~0xfff;
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WARN("Attempt to open MC TZ win. at 0x%llx, truncate to 0x%x\n",
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win->base_addr, base);
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}
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val = base | (tz_size << 7) | win->target_id | TZ_VALID;
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VERBOSE("%s: base 0x%x, tz_size moved 0x%x, attr 0x%x, val 0x%x\n",
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__func__, base, (tz_size << 7), win->target_id, val);
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mmio_write_32(MVEBU_AP_MC_TRUSTZONE_REG_LOW(ap_index, win_id), val);
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VERBOSE("%s: Win%d[0x%x] configured to 0x%x\n", __func__, win_id,
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MVEBU_AP_MC_TRUSTZONE_REG_LOW(ap_index, win_id),
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mmio_read_32(MVEBU_AP_MC_TRUSTZONE_REG_LOW(ap_index, win_id)));
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mmio_write_32(MVEBU_AP_MC_TRUSTZONE_REG_HIGH(ap_index, win_id),
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(win->base_addr >> 32));
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VERBOSE("%s: Win%d[0x%x] configured to 0x%x\n", __func__, win_id,
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MVEBU_AP_MC_TRUSTZONE_REG_HIGH(ap_index, win_id),
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mmio_read_32(MVEBU_AP_MC_TRUSTZONE_REG_HIGH(ap_index, win_id)));
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}
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