opensbi.git/include/sbi/sbi_bitops.h, branch master

sbi: Introduce sbi_hartmask_weight

2025-04-14T09:59:19Z

Provide a function to count the number of set bits in a hartmask, which builds on a new function for the same that operates on a bitmask. While at it, improve the performance of sbi_popcount() which is used in the implementation. Signed-off-by: Andrew Jones Reviewed-by: Anup Patel Link: https://lore.kernel.org/r/20250314163021.154530-5-ajones@ventanamicro.com Signed-off-by: Anup Patel

include: sbi_bitops: add ULL version for BIT and GENMASK

2024-09-23T13:03:02Z

Add BIT_ULL and GENMASK_ULL for dealing with 64-bits data on 32-bits CPU, then we don't need to separate the operation to low part and high part. For instance, the MMIO register is 64 bits wide. Signed-off-by: Zong Li Reviewed-by: Anup Patel

platform: recalculate heap size to support new tlb entry number

2023-12-11T03:53:24Z

Previous patch introduced a change that using hart count as the default number of tlb entries in the fifo. This makes the default tlb fifo size grow in square with the number of harts. So the default heap size is not enough to allocate tlb fifo when the hart count is big. Fixes: 52fd64b ("platform: Uses hart count as the default size of tlb info") Signed-off-by: Inochi Amaoto Reviewed-by: Anup Patel

lib: sbi_pmu: remove mhpm_count field in hart feature

2023-08-22T07:56:09Z

After supporting noncontigous hpm event and counters in opensbi, the number of hpm counters can be calculated by the mhpm_mask. So this field is unnecessary and can be removed to save some space. Signed-off-by: Inochi Amaoto Reviewed-by: Anup Patel

lib: sbi: Simplify BITS_PER_LONG definition

2023-05-11T07:26:56Z

No need to use #elif ladder when defining BITS_PER_LONG. Signed-off-by: Xiang W Reviewed-by: Andrew Jones 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

include: sbi_bitops: Remove dead shift assignment in ffs/fls

2020-07-14T11:33:30Z

The value assigned to x by the shift assignment in the last if block of ffs/fls is never read. Remove it. Signed-off-by: Tobias Klauser Reviewed-by: Anup Patel

lib: sbi: Fix coding style issues

2020-03-10T04:57:28Z

This fixes various coding style issues found in the SBI codes. No functional changes. Signed-off-by: Bin Meng Reviewed-by: Anup Patel

include: sbi_bitops: More useful bit operations

2020-03-08T05:39:46Z

This patch extends our bit operation library with mechanism to: 1. Iteratively traverse bits 2. Set bit 3. Clear bit 4. Change bit 5. ... other helpful functions ... Most the above is adopted from Xvisor sources. Signed-off-by: Anup Patel Reviewed-by: Atish Patra

include: Move bits related defines and macros to sbi_bitops.h

2020-03-08T05:36:18Z

The right location for all bits related defines and macros is sbi_bitops.h hence this patch. With this patch, the sbi_bits.h is redundant so we remove it. Signed-off-by: Anup Patel Reviewed-by: Atish Patra