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arm-trusted-firmware/include/drivers/arm/sp804_delay_timer.h

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Add SP804 delay timer driver Add a delay timer driver for the ARM SP804 dual timer. This driver only uses the first timer, called timer 1 in the SP804 Technical Reference Manual (ARM DDI 0271D). To use this driver, the BSP must provide three constants: * The base address of the SP804 dual timer * The clock multiplier * The clock divider The BSP is responsible for calling sp804_timer_init(). The SP804 driver instantiates a constant timer_ops_t and calls the generic timer_init(). Change-Id: I49ba0a52bdf6072f403d1d0a20e305151d4bc086 Co-authored-by: Dan Handley <dan.handley@arm.com>
10 years ago
/*
* Copyright (c) 2015, ARM Limited and Contributors. All rights reserved.
*
Use SPDX license identifiers To make software license auditing simpler, use SPDX[0] license identifiers instead of duplicating the license text in every file. NOTE: Files that have been imported by FreeBSD have not been modified. [0]: https://spdx.org/ Change-Id: I80a00e1f641b8cc075ca5a95b10607ed9ed8761a Signed-off-by: dp-arm <dimitris.papastamos@arm.com>
8 years ago
* SPDX-License-Identifier: BSD-3-Clause
Add SP804 delay timer driver Add a delay timer driver for the ARM SP804 dual timer. This driver only uses the first timer, called timer 1 in the SP804 Technical Reference Manual (ARM DDI 0271D). To use this driver, the BSP must provide three constants: * The base address of the SP804 dual timer * The clock multiplier * The clock divider The BSP is responsible for calling sp804_timer_init(). The SP804 driver instantiates a constant timer_ops_t and calls the generic timer_init(). Change-Id: I49ba0a52bdf6072f403d1d0a20e305151d4bc086 Co-authored-by: Dan Handley <dan.handley@arm.com>
10 years ago
*/
Standardise header guards across codebase All identifiers, regardless of use, that start with two underscores are reserved. This means they can't be used in header guards. The style that this project is now to use the full name of the file in capital letters followed by 'H'. For example, for a file called "uart_example.h", the header guard is UART_EXAMPLE_H. The exceptions are files that are imported from other projects: - CryptoCell driver - dt-bindings folders - zlib headers Change-Id: I50561bf6c88b491ec440d0c8385c74650f3c106e Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
6 years ago
#ifndef SP804_DELAY_TIMER_H
#define SP804_DELAY_TIMER_H
Add SP804 delay timer driver Add a delay timer driver for the ARM SP804 dual timer. This driver only uses the first timer, called timer 1 in the SP804 Technical Reference Manual (ARM DDI 0271D). To use this driver, the BSP must provide three constants: * The base address of the SP804 dual timer * The clock multiplier * The clock divider The BSP is responsible for calling sp804_timer_init(). The SP804 driver instantiates a constant timer_ops_t and calls the generic timer_init(). Change-Id: I49ba0a52bdf6072f403d1d0a20e305151d4bc086 Co-authored-by: Dan Handley <dan.handley@arm.com>
10 years ago
#include <stdint.h>
Sanitise includes across codebase 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&#39;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: e0ea0928d5b7 (&#34;Fix gpio includes of mt8173 platform to avoid collision.&#34;). More recently, this patch has had similar problems: 46f9b2c3a282 (&#34;drivers: add tzc380 support&#34;). This problem was introduced in commit 4ecca33988b9 (&#34;Move include and source files to logical locations&#34;). At that time, there weren&#39;t too many headers so it wasn&#39;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 &lt;antonio.ninodiaz@arm.com&gt;
6 years ago
#include <drivers/delay_timer.h>
Add SP804 delay timer driver Add a delay timer driver for the ARM SP804 dual timer. This driver only uses the first timer, called timer 1 in the SP804 Technical Reference Manual (ARM DDI 0271D). To use this driver, the BSP must provide three constants: * The base address of the SP804 dual timer * The clock multiplier * The clock divider The BSP is responsible for calling sp804_timer_init(). The SP804 driver instantiates a constant timer_ops_t and calls the generic timer_init(). Change-Id: I49ba0a52bdf6072f403d1d0a20e305151d4bc086 Co-authored-by: Dan Handley &lt;dan.handley@arm.com&gt;
10 years ago
uint32_t sp804_get_timer_value(void);
void sp804_timer_ops_init(uintptr_t base_addr, const timer_ops_t *ops);
#define sp804_timer_init(base_addr, clk_mult, clk_div) \
Bug fix in the SP804 dual timer driver The generic delay timer driver expects a pointer to a timer_ops_t structure containing the specific timer driver information. It doesn&#39;t make a copy of the structure, instead it just keeps the pointer. Therefore, this pointer must remain valid over time. The SP804 driver doesn&#39;t satisfy this requirement. The sp804_timer_init() macro creates a temporary instanciation of the timer_ops_t structure on the fly and passes it to the generic delay timer. When this temporary instanciation gets deallocated, the generic delay timer is left with a pointer to invalid data. This patch fixes this bug by statically allocating the SP804 timer_ops_t structure. Change-Id: I8fbf75907583aef06701e3fd9fabe0b2c9bc95bf
9 years ago
do { \
static const timer_ops_t sp804_timer_ops = { \
sp804_get_timer_value, \
(clk_mult), \
(clk_div) \
}; \
sp804_timer_ops_init((base_addr), &sp804_timer_ops); \
} while (0)
Add SP804 delay timer driver Add a delay timer driver for the ARM SP804 dual timer. This driver only uses the first timer, called timer 1 in the SP804 Technical Reference Manual (ARM DDI 0271D). To use this driver, the BSP must provide three constants: * The base address of the SP804 dual timer * The clock multiplier * The clock divider The BSP is responsible for calling sp804_timer_init(). The SP804 driver instantiates a constant timer_ops_t and calls the generic timer_init(). Change-Id: I49ba0a52bdf6072f403d1d0a20e305151d4bc086 Co-authored-by: Dan Handley &lt;dan.handley@arm.com&gt;
10 years ago
Standardise header guards across codebase All identifiers, regardless of use, that start with two underscores are reserved. This means they can&#39;t be used in header guards. The style that this project is now to use the full name of the file in capital letters followed by &#39;H&#39;. For example, for a file called &#34;uart_example.h&#34;, the header guard is UART_EXAMPLE_H. The exceptions are files that are imported from other projects: - CryptoCell driver - dt-bindings folders - zlib headers Change-Id: I50561bf6c88b491ec440d0c8385c74650f3c106e Signed-off-by: Antonio Nino Diaz &lt;antonio.ninodiaz@arm.com&gt;
6 years ago
#endif /* SP804_DELAY_TIMER_H */