| /* |
| * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| #include <assert.h> |
| #include <debug.h> |
| #include <mmio.h> |
| #include <stddef.h> |
| #include <tzc380.h> |
| |
| struct tzc380_instance { |
| uintptr_t base; |
| uint8_t addr_width; |
| uint8_t num_regions; |
| }; |
| |
| struct tzc380_instance tzc380; |
| |
| static unsigned int tzc380_read_build_config(uintptr_t base) |
| { |
| return mmio_read_32(base + TZC380_CONFIGURATION_OFF); |
| } |
| |
| static void tzc380_write_action(uintptr_t base, tzc_action_t action) |
| { |
| mmio_write_32(base + ACTION_OFF, action); |
| } |
| |
| static void tzc380_write_region_base_low(uintptr_t base, unsigned int region, |
| unsigned int val) |
| { |
| mmio_write_32(base + REGION_SETUP_LOW_OFF(region), val); |
| } |
| |
| static void tzc380_write_region_base_high(uintptr_t base, unsigned int region, |
| unsigned int val) |
| { |
| mmio_write_32(base + REGION_SETUP_HIGH_OFF(region), val); |
| } |
| |
| static void tzc380_write_region_attributes(uintptr_t base, unsigned int region, |
| unsigned int val) |
| { |
| mmio_write_32(base + REGION_ATTRIBUTES_OFF(region), val); |
| } |
| |
| void tzc380_init(uintptr_t base) |
| { |
| unsigned int tzc_build; |
| |
| assert(base != NULL); |
| tzc380.base = base; |
| |
| /* Save values we will use later. */ |
| tzc_build = tzc380_read_build_config(tzc380.base); |
| tzc380.addr_width = ((tzc_build >> BUILD_CONFIG_AW_SHIFT) & |
| BUILD_CONFIG_AW_MASK) + 1; |
| tzc380.num_regions = ((tzc_build >> BUILD_CONFIG_NR_SHIFT) & |
| BUILD_CONFIG_NR_MASK) + 1; |
| } |
| |
| static uint32_t addr_low(uintptr_t addr) |
| { |
| return (uint32_t)addr; |
| } |
| |
| static uint32_t addr_high(uintptr_t addr __unused) |
| { |
| #if (UINTPTR_MAX == UINT64_MAX) |
| return addr >> 32; |
| #else |
| return 0; |
| #endif |
| } |
| |
| /* |
| * `tzc380_configure_region` is used to program regions into the TrustZone |
| * controller. |
| */ |
| void tzc380_configure_region(uint8_t region, uintptr_t region_base, unsigned int attr) |
| { |
| assert(tzc380.base != NULL); |
| |
| assert(region < tzc380.num_regions); |
| |
| tzc380_write_region_base_low(tzc380.base, region, addr_low(region_base)); |
| tzc380_write_region_base_high(tzc380.base, region, addr_high(region_base)); |
| tzc380_write_region_attributes(tzc380.base, region, attr); |
| } |
| |
| void tzc380_set_action(tzc_action_t action) |
| { |
| assert(tzc380.base != NULL); |
| |
| /* |
| * - Currently no handler is provided to trap an error via interrupt |
| * or exception. |
| * - The interrupt action has not been tested. |
| */ |
| tzc380_write_action(tzc380.base, action); |
| } |