opensbi.git/lib/utils/timer/aclint_mtimer.c, branch master

lib: utils/timer: Expose timer update function

2025-10-28T05:58:06Z

Exposing the ACLINT timer update APIs so the user can update the mtimer after waking up from the non-retentive suspend. Reviewed-by: Cyan Yang Reviewed-by: Anup Patel Signed-off-by: Nick Hu Link: https://lore.kernel.org/r/20251020-cache-upstream-v7-10-69a132447d8a@sifive.com Signed-off-by: Anup Patel

lib: sbi_timer: Call driver warm_init from SBI core

2024-11-05T11:59:13Z

Currently, the platform's timer device is tracked in two places: the core SBI implementation has `timer_dev`, and the FDT timer layer has `current_driver`. The latter is used for warm initialization of the timer device. However, this warm init is not specific to FDT-based platforms; other platforms call exactly the same functions from the same point in the boot sequence. The code is simplified and made common across platforms by treating warm init and exit as properties of the driver, not the platform. Then the platform's only role is to select and prepare a driver during cold boot. For now, only add a .warm_init hook, since none of the existing drivers need an .exit hook. It could be added in the future if needed. Signed-off-by: Samuel Holland Reviewed-by: Anup Patel

lib: utils/timer: Optimize current hart scratch access

2024-04-05T12:04:24Z

The address of the local scratch area is stored in each hart's mscratch CSR. It is more efficient to read the CSR than to compute the address from the hart ID. Signed-off-by: Samuel Holland Reviewed-by: Anup Patel

lib: utils: Fix sbi_hartid_to_scratch() usage in ACLINT drivers

2023-07-09T05:34:57Z

The cold_init() functions of ACLINT drivers should skip the HART if sbi_hartid_to_scratch() returns NULL because we might be dealing with a HART that is disabled in the device tree. Signed-off-by: Anup Patel Reviewed-by: Xiang W

lib: utils/timer: Use scratch space to save per-HART MTIMER pointer

2023-06-05T11:16:50Z

Instead of using a global array indexed by hartid, we should use scratch space to save per-HART MTIMER pointer. Signed-off-by: Anup Patel Reviewed-by: Andrew Jones

lib: utils: Add M-mode {R/W} flags to the MMIO regions

2023-01-09T12:34:28Z

Add the M-mode readable/writable flags to mmio regions of various drivers. Signed-off-by: Himanshu Chauhan Reviewed-by: Anup Patel Tested-by: Anup Patel

lib: utils/timer: mtimer: add a quirk for lacking mtime register

2022-12-17T05:31:03Z

T-Head developers surely have a different understanding of time CSR and CLINT's mtime register with SiFive ones, that they did not implement the mtime register at all -- as shown in openC906 source code, their time CSR value is just exposed at the top of their processor IP block and expects an external continous counter, which makes it not overrideable, and thus mtime register is not implemented, even not for reading. However, if CLINTEE is not enabled in T-Head's MXSTATUS extended CSR, these systems still rely on the mtimecmp registers to generate timer interrupts. This makes it necessary to implement T-Head C9xx CLINT support in OpenSBI MTIMER driver, which skips implementing reading mtime register and falls back to default code that reads time CSR. Add a quirk into MTIMER driver, which represents a mtime register is lacking and time CSR value should be used instead. Signed-off-by: Icenowy Zheng Reviewed-by: Anup Patel

lib: sbi: Add sbi_domain_root_add_memrange() API

2022-10-23T04:51:21Z

This patch generalizes the logic to add a memory range with desired alignment and flags of consecutive regions to the root domain. Signed-off-by: Yu Chien Peter Lin Reviewed-by: Anup Patel

lib: fix compilation when strings.h is included

2022-02-04T05:34:19Z

In a systems that provide strings.h and it is included together with sbi_bitops.h the compilation error appears. The ffs() and fls() are provided by strings.h Signed-off-by: Petro Karashchenko Reviewed-by: Anup Patel

lib: fix pointer of type 'void *' used in arithmetic

2022-01-21T16:28:12Z

Using "void *" in arithmetic causes errors with strict compiler settings: "error: pointer of type 'void *' used in arithmetic [-Werror=pointer-arith]" Avoid these by calculating on "char *" where 1-byte data size is assumed. Signed-off-by: Jukka Laitinen Reviewed-by: Dong Du Reviewed-by: Xiang W Reviewed-by: Anup Patel