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09d40e0e08
Enforce full include path for includes. Deprecate old paths.
The following folders inside include/lib have been left unchanged:
- include/lib/cpus/${ARCH}
- include/lib/el3_runtime/${ARCH}
The reason for this change is that having a global namespace for
includes isn't a good idea. It defeats one of the advantages of having
folders and it introduces problems that are sometimes subtle (because
you may not know the header you are actually including if there are two
of them).
For example, this patch had to be created because two headers were
called the same way: e0ea0928d5 ("Fix gpio includes of mt8173 platform
to avoid collision."). More recently, this patch has had similar
problems: 46f9b2c3a2 ("drivers: add tzc380 support").
This problem was introduced in commit 4ecca33988 ("Move include and
source files to logical locations"). At that time, there weren't too
many headers so it wasn't a real issue. However, time has shown that
this creates problems.
Platforms that want to preserve the way they include headers may add the
removed paths to PLAT_INCLUDES, but this is discouraged.
Change-Id: I39dc53ed98f9e297a5966e723d1936d6ccf2fc8f
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
104 lines
2.4 KiB
C
104 lines
2.4 KiB
C
/*
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* Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <assert.h>
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#include <stddef.h>
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#include <common/debug.h>
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#include <drivers/arm/tzc380.h>
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#include <lib/mmio.h>
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struct tzc380_instance {
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uintptr_t base;
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uint8_t addr_width;
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uint8_t num_regions;
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};
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struct tzc380_instance tzc380;
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static unsigned int tzc380_read_build_config(uintptr_t base)
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{
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return mmio_read_32(base + TZC380_CONFIGURATION_OFF);
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}
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static void tzc380_write_action(uintptr_t base, tzc_action_t action)
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{
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mmio_write_32(base + ACTION_OFF, action);
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}
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static void tzc380_write_region_base_low(uintptr_t base, unsigned int region,
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unsigned int val)
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{
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mmio_write_32(base + REGION_SETUP_LOW_OFF(region), val);
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}
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static void tzc380_write_region_base_high(uintptr_t base, unsigned int region,
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unsigned int val)
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{
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mmio_write_32(base + REGION_SETUP_HIGH_OFF(region), val);
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}
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static void tzc380_write_region_attributes(uintptr_t base, unsigned int region,
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unsigned int val)
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{
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mmio_write_32(base + REGION_ATTRIBUTES_OFF(region), val);
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}
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void tzc380_init(uintptr_t base)
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{
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unsigned int tzc_build;
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assert(base != 0U);
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tzc380.base = base;
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/* Save values we will use later. */
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tzc_build = tzc380_read_build_config(tzc380.base);
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tzc380.addr_width = ((tzc_build >> BUILD_CONFIG_AW_SHIFT) &
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BUILD_CONFIG_AW_MASK) + 1;
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tzc380.num_regions = ((tzc_build >> BUILD_CONFIG_NR_SHIFT) &
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BUILD_CONFIG_NR_MASK) + 1;
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}
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static uint32_t addr_low(uintptr_t addr)
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{
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return (uint32_t)addr;
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}
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static uint32_t addr_high(uintptr_t addr __unused)
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{
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#if (UINTPTR_MAX == UINT64_MAX)
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return addr >> 32;
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#else
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return 0;
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#endif
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}
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/*
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* `tzc380_configure_region` is used to program regions into the TrustZone
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* controller.
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*/
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void tzc380_configure_region(uint8_t region, uintptr_t region_base, unsigned int attr)
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{
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assert(tzc380.base != 0U);
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assert(region < tzc380.num_regions);
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tzc380_write_region_base_low(tzc380.base, region, addr_low(region_base));
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tzc380_write_region_base_high(tzc380.base, region, addr_high(region_base));
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tzc380_write_region_attributes(tzc380.base, region, attr);
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}
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void tzc380_set_action(tzc_action_t action)
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{
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assert(tzc380.base != 0U);
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/*
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* - Currently no handler is provided to trap an error via interrupt
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* or exception.
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* - The interrupt action has not been tested.
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*/
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tzc380_write_action(tzc380.base, action);
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}
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