opensbi.git/include/sbi/sbi_timer.h, branch v1.2

lib: sbi_timer: Added a conditional wait function which can timeout

2022-07-08T09:21:24Z

Motivation: Suppose a peripheral needs to be configured to transmit data. There is an SFR bit which indicates that the peripheral is ready to transmit. The firmware should check the bit and will only transmit data when the peripheral is ready. When the firmware starts polling the SFR, the peripheral could be busy transmitting/receiving other data so the firmware must wait till that completes. Assuming that there is no other way, the firmware shouldn't wait indefinitely. The function sbi_timer_waitms_until() will constantly check whether a certain condition is satisfied, or timeout occurs. It can be used for the cases when a timeout is required. Signed-off-by: Adnan Rahman Chowdhury Reviewed-by: Xiang W Reviewed-by: Anup Patel

lib: sbi: Add generic timer delay loop function

2021-09-26T14:22:15Z

We now have frequency of the timer device provided by the platform support so we can emulate desired delay using a loop where the number loop iterations are based on timer frequency. This patch provides sbi_timer_delay_loop() for above purpose. Signed-off-by: Anup Patel Reviewed-by: Bin Meng Reviewed-by: Xiang W

lib: sbi: Add timer frequency to struct sbi_timer_device

2021-09-26T14:22:10Z

Generic mdelay() and udelay() functions can be provided by the sbi_timer framework if timer frequency is available in the timer instance provided by the platform support or timer driver. This patch adds timer frequency (timer_freq) member in the struct sbi_timer_device for above purpose. Signed-off-by: Anup Patel Reviewed-by: Bin Meng Reviewed-by: Xiang W

lib: sbi: Simplify timer platform operations

2021-04-28T11:30:49Z

Instead of having timer_value(), timer_event_start(), and timer_event_stop() callbacks in platform operations, it will be much simpler for timer driver to directly register these operations as device to the sbi_timer implementation. Signed-off-by: Anup Patel Reviewed-by: Alistair Francis

include: sbi_timer: Remove scratch parameter from most funcitons

2020-03-28T08:02:55Z

This patch removes scratch parameter from most sbi_timer functions. Signed-off-by: Anup Patel Reviewed-by: Atish Patra

lib: Add timer exit API

2020-01-07T06:40:55Z

We add sbi_timer_exit() API for OpenSBI exit path handling in sbi_exit() implementation. Signed-off-by: Anup Patel Reviewed-by: Atish Patra

lib: Emulate HTIMEDELTA CSR for platforms not having TIME CSR

2019-09-30T10:06:14Z

For platforms not having TIME CSR, we trap-n-emulate TIME CSR read/write in OpenSBI. Same rationale applies to HTIMEDELTA CSR as well so we trap-n-emulate HTIMEDELTA CSR for platforms not having TIME CSR. Signed-off-by: Anup Patel

all: Update copyright header in all files

2019-01-24T08:37:47Z

This patch updates copyright header in all files as follows: 1. Makes "SPDX-License-Identifier: BSD-2-Clause" as first line 2. Change copyright year to 2019 for Western Digital Signed-off-by: Anup Patel

lib: Remove target_hart and hartid parameter from TIMER callbacks

2019-01-23T03:09:26Z

The target_hart and hartid paramter of TIMER callbacks is not required because it always current hartid which can be obtained using sbi_current_hartid() API. Signed-off-by: Anup Patel

lib: Simplify sbi_platform timer_init() hooks

2018-12-27T04:05:09Z

Instead of having separate timer_init() hooks for cold and warm boot, this patch updates struct sbi_platform to have just one timer_init() hook. The type of boot (cold or warm) is now a boolean flag parameter for the updated timer_init() hook. Signed-off-by: Anup Patel