opensbi.git/lib/sbi/riscv_locks.c, branch v1.2

lib: sbi: Have spinlock checks return bool

2021-05-14T11:35:20Z

spin_lock_check already returned bool in the source file but not in the header. With some toolchains that causes an error, as it should. Because it and related functions all essentially return a bool, we can use this opportunity to change them. Signed-off-by: Daniel Schaefer Reviewed-by: Anup Patel

lib: sbi: Replace test-and-set locks by ticket locks

2021-04-09T13:18:50Z

Replace the test-and-set spinlock implementation with ticket locks in order to get fairness (in form of FIFO order). The implementation uses a 32-bit wide struct, which consists of two 16-bit counters (owner and next). This is inspired by similar spinlock implementations on other architectures. This allows that the code works for both, RV32 and RV64. Signed-off-by: Christoph Muellner Reviewed-by: Anup Patel Reviewed-by: Xiang W

lib: Move sbi core library to lib/sbi

2019-06-19T04:18:51Z

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