opensbi.git/lib/sbi/sbi_timer.c, branch v1.0

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: Implement firmware counters

2021-07-11T05:08:23Z

RISC-V SBI v0.3 specification defines a set of firmware events that can provide additional information about the current firmware context. All of the firmware event monitoring are enabled now. The firmware events must be defined as raw perf event with MSB set as specified in the specification. Reviewed-by: Anup Patel Signed-off-by: Atish Patra

lib: sbi_scratch: remove owner from sbi_scratch_alloc_offset

2021-06-02T11:37:26Z

The parameter owner of function sbi_scratch_alloc_offset() is never used. The scratch memory is small. We should not use it for debug information in future. Hence eliminate the parameter. Signed-off-by: Heinrich Schuchardt Reviewed-by: Xiang W Reviewed-by: Anup Patel

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: Use scratch pointer as parmeter in HART feature APIs

2020-05-19T03:49:42Z

It makes more sense to have scratch pointer as parameter in HART feature APIs because: 1. We already have scratch pointer at places where these APIs are used. 2. This is consistent with lot of other APIs in sbi_hart.h Signed-off-by: Anup Patel Reviewed-by: Atish Patra

lib: timer: Provide a hart based timer feature

2020-05-10T04:44:54Z

As per the RISC-V specification, time value can be obtained from a time CSR implemented in hardware or a MMIO based IP block. Qemu virt machine already supports timer csr while CLINT provides the timer for other platforms. Implement a hart specific timer feature that can be detected at runtime. As CSR based timer implementation are faster than MMIO address based, it is always preferred over MMIO based one. Signed-off-by: Atish Patra Tested-by: Jonathan Balkind Reviewed-by: Anup Patel

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

lib: Move sbi core library to lib/sbi

2019-06-19T04:18:51Z

Signed-off-by: Atish Patra Acked-by: Anup Patel