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82cb2c1ad9
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>
55 lines
1.7 KiB
C
55 lines
1.7 KiB
C
/*
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* Copyright (c) 2015, 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 <delay_timer.h>
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#include <mmio.h>
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uintptr_t sp804_base_addr;
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#define SP804_TIMER1_LOAD (sp804_base_addr + 0x000)
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#define SP804_TIMER1_VALUE (sp804_base_addr + 0x004)
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#define SP804_TIMER1_CONTROL (sp804_base_addr + 0x008)
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#define SP804_TIMER1_BGLOAD (sp804_base_addr + 0x018)
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#define TIMER_CTRL_ONESHOT (1 << 0)
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#define TIMER_CTRL_32BIT (1 << 1)
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#define TIMER_CTRL_DIV1 (0 << 2)
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#define TIMER_CTRL_DIV16 (1 << 2)
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#define TIMER_CTRL_DIV256 (2 << 2)
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#define TIMER_CTRL_IE (1 << 5)
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#define TIMER_CTRL_PERIODIC (1 << 6)
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#define TIMER_CTRL_ENABLE (1 << 7)
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/********************************************************************
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* The SP804 timer delay function
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********************************************************************/
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uint32_t sp804_get_timer_value(void)
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{
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return mmio_read_32(SP804_TIMER1_VALUE);
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}
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/********************************************************************
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* Initialize the 1st timer in the SP804 dual timer with a base
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* address and a timer ops
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********************************************************************/
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void sp804_timer_ops_init(uintptr_t base_addr, const timer_ops_t *ops)
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{
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assert(base_addr != 0);
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assert(ops != 0 && ops->get_timer_value == sp804_get_timer_value);
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sp804_base_addr = base_addr;
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timer_init(ops);
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/* disable timer1 */
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mmio_write_32(SP804_TIMER1_CONTROL, 0);
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mmio_write_32(SP804_TIMER1_LOAD, UINT32_MAX);
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mmio_write_32(SP804_TIMER1_VALUE, UINT32_MAX);
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/* enable as a free running 32-bit counter */
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mmio_write_32(SP804_TIMER1_CONTROL,
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TIMER_CTRL_32BIT | TIMER_CTRL_ENABLE);
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}
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