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/*
* Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <assert.h>
#include <stddef.h>
#include <common/debug.h>
#include <drivers/arm/tzc380.h>
#include <lib/mmio.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, unsigned int 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 != 0U);
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 != 0U);
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(unsigned int action)
{
assert(tzc380.base != 0U);
/*
* - 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
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