4344e27c26
Update reserved function names starting with one underscore, replacing them as follows: '_k_' with 'z_' '_K_' with 'Z_' '_handler_' with 'z_handl_' '_Cstart' with 'z_cstart' '_Swap' with 'z_swap' This renaming is done on both global and those static function names in kernel/include and include/. Other static function names in kernel/ are renamed by removing the leading underscore. Other function names not starting with any prefix listed above are renamed starting with a 'z_' or 'Z_' prefix. Function names starting with two or three leading underscores are not automatcally renamed since these names will collide with the variants with two or three leading underscores. Various generator scripts have also been updated as well as perf, linker and usb files. These are drivers/serial/uart_handlers.c include/linker/kobject-text.ld kernel/include/syscall_handler.h scripts/gen_kobject_list.py scripts/gen_syscall_header.py Signed-off-by: Patrik Flykt <patrik.flykt@intel.com>
82 lines
2.1 KiB
C
82 lines
2.1 KiB
C
/*
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* Copyright (c) 2017 Intel Corporation
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <kernel.h>
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#include <arch/cpu.h>
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#include <device.h>
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#include <system_timer.h>
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#include <altera_common.h>
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#include "altera_avalon_timer_regs.h"
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#include "altera_avalon_timer.h"
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#include "legacy_api.h"
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static u32_t accumulated_cycle_count;
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static s32_t _sys_idle_elapsed_ticks = 1;
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static void timer_irq_handler(void *unused)
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{
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ARG_UNUSED(unused);
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#ifdef CONFIG_EXECUTION_BENCHMARKING
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extern void read_timer_start_of_tick_handler(void);
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read_timer_start_of_tick_handler();
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#endif
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accumulated_cycle_count += sys_clock_hw_cycles_per_tick();
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/* Clear the interrupt */
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alt_handle_irq((void *)TIMER_0_BASE, TIMER_0_IRQ);
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z_clock_announce(_sys_idle_elapsed_ticks);
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#ifdef CONFIG_EXECUTION_BENCHMARKING
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extern void read_timer_end_of_tick_handler(void);
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read_timer_end_of_tick_handler();
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#endif
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}
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int z_clock_driver_init(struct device *device)
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{
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ARG_UNUSED(device);
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IOWR_ALTERA_AVALON_TIMER_PERIODL(TIMER_0_BASE,
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sys_clock_hw_cycles_per_tick() & 0xFFFF);
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IOWR_ALTERA_AVALON_TIMER_PERIODH(TIMER_0_BASE,
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(sys_clock_hw_cycles_per_tick() >> 16) & 0xFFFF);
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IRQ_CONNECT(TIMER_0_IRQ, 0, timer_irq_handler, NULL, 0);
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irq_enable(TIMER_0_IRQ);
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alt_avalon_timer_sc_init((void *)TIMER_0_BASE, 0,
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TIMER_0_IRQ, sys_clock_hw_cycles_per_tick());
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return 0;
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}
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u32_t z_timer_cycle_get_32(void)
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{
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/* Per the Altera Embedded IP Peripherals guide, you cannot
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* use a timer instance for both the system clock and timestamps
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* at the same time.
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*
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* Having this function return accumulated_cycle_count + get_snapshot()
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* does not work reliably. It's possible for the current countdown
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* to reset to the next interval before the timer interrupt is
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* delivered (and accumulated cycle count gets updated). The result
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* is an unlucky call to this function will appear to jump backward
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* in time.
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*
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* To properly obtain timestamps, the CPU must be configured with
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* a second timer peripheral instance that is configured to
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* count down from some large initial 64-bit value. This
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* is currently unimplemented.
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*/
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return accumulated_cycle_count;
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}
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