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

include: sbi_bitmap: add bitmap_empty() function

2026-04-08T12:28:05Z

Add bitmap_empty() to check if bitmap has no bits set. Unlike bitmap_weight() which calls sbi_popcount() on every word, bitmap_empty() uses simple non-zero comparisons with early exit. Signed-off-by: Yu-Chien Peter Lin Reviewed-by: Anup Patel Link: https://lore.kernel.org/r/20260311125116.1401002-1-peter.lin@sifive.com Signed-off-by: Anup Patel

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

platform: generic: Add support for specify coldboot harts in DT

2024-02-20T10:19:36Z

Added support for the generic platform to specify the set of coldboot hart in DT. If not specified in DT, all harts are allowed to coldboot as before. The functions related to sbi_hartmask are not available before coldboot, so I used bitmap, and added a new bitmap_test() function to test whether a certain bit of the bitmap is set. Signed-off-by: Cheng Yang Reviewed-by: Anup Patel

lib: Simple bitmap library

2020-03-11T09:59:45Z

We add simple bitmap library which will help us create and maintain bitmaps. It will also help us create a simple HART mask library. Signed-off-by: Anup Patel Reviewed-by: Bin Meng Reviewed-by: Atish Patra