From 7b12ecaf61702724cd14a2115143f6fd8d84d6ed Mon Sep 17 00:00:00 2001 From: Peng Fan Date: Wed, 5 Jul 2017 16:34:37 +0800 Subject: drivers: add tzc380 support Add tzc380 support. Signed-off-by: Peng Fan --- drivers/arm/tzc/tzc380.c | 174 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 174 insertions(+) create mode 100644 drivers/arm/tzc/tzc380.c (limited to 'drivers') diff --git a/drivers/arm/tzc/tzc380.c b/drivers/arm/tzc/tzc380.c new file mode 100644 index 00000000..03cd3ed4 --- /dev/null +++ b/drivers/arm/tzc/tzc380.c @@ -0,0 +1,174 @@ +/* + * Copyright 2017 NXP + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * Neither the name of ARM nor the names of its contributors may be used + * to endorse or promote products derived from this software without specific + * prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include +#include +#include +#include +#include + +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 + BUILD_CONFIG_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); + 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 unsigned int addr_low(uintptr_t addr) +{ + return (unsigned int)addr; +} + +static unsigned int 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); + + 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); + + /* + * - 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); +} + +#if LOG_LEVEL >= LOG_LEVEL_INFO + +static unsigned int tzc380_read_region_attributes(uintptr_t base, unsigned int region) +{ + return mmio_read_32(base + REGION_ATTRIBUTES_OFF(region)); +} + +static unsigned int tzc380_read_region_base_low(uintptr_t base, unsigned int region) +{ + return mmio_read_32(base + REGION_SETUP_LOW_OFF(region)); +} + +static unsigned int tzc380_read_region_base_high(uintptr_t base, unsigned int region) +{ + return mmio_read_32(base + REGION_SETUP_HIGH_OFF(region)); +} + +#define REGION_MAX 16 +void tzc380_dump_state(void) +{ + unsigned int n; + unsigned int temp_32reg, temp_32reg_h; + + INFO("enter\n"); + INFO("security_inversion_en %x\n", + mmio_read_32(tzc380.base + SECURITY_INV_EN_OFF)); + for (n = 0; n <= REGION_MAX; n++) { + temp_32reg = tzc380_read_region_attributes(tzc380.base, n); + if (!(temp_32reg & TZC_ATTR_REGION_EN_MASK)) + continue; + + INFO("\n"); + INFO("region %d\n", n); + temp_32reg = tzc380_read_region_base_low(tzc380.base, n); + temp_32reg_h = tzc380_read_region_base_high(tzc380.base, n); + INFO("region_base: 0x%08x%08x\n", temp_32reg_h, temp_32reg); + temp_32reg = tzc380_read_region_attributes(tzc380.base, n); + INFO("region sp: %x\n", temp_32reg >> TZC_ATTR_SP_SHIFT); + INFO("region size: %x\n", (temp_32reg & TZC_REGION_SIZE_MASK) >> + TZC_REGION_SIZE_SHIFT); + } + INFO("exit\n"); +} + +#endif -- cgit v1.2.3