Firmware/opensbi
8
0
Fork 0
forked from Mirrors/opensbi
Code Pull Requests Activity

include: sbi_bitops: add ULL version for BIT and GENMASK

Browse Source 
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 <zong.li@sifive.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Zong Li
2024-08-30 11:16:10 +08:00
committed by Anup Patel
parent 040fcf49ab
commit 570b9ae89a
1 changed files with 6 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
include/sbi/sbi_bitops.h
View File

@@ -14,6 +14,8 @@
#define BITS_PER_LONG (8 * __SIZEOF_LONG__)
#define BITS_PER_LONG_LONG 64
#define EXTRACT_FIELD(val, which) \
(((val) & (which)) / ((which) & ~((which)-1)))
#define INSERT_FIELD(val, which, fieldval) \
@@ -28,9 +30,13 @@
#define BIT_WORD_OFFSET(bit) ((bit) & (BITS_PER_LONG - 1))
#define BIT_ALIGN(bit, align) (((bit) + ((align) - 1)) & ~((align) - 1))
#define BIT_ULL(nr) (1ULL << (nr))
#define GENMASK(h, l) \
(((~0UL) - (1UL << (l)) + 1) & (~0UL >> (BITS_PER_LONG - 1 - (h))))
#define GENMASK_ULL(h, l) \
(((~0ULL) - (1ULL << (l)) + 1) & (~0ULL >> (BITS_PER_LONG_LONG - 1 - (h))))
/**
* sbi_ffs - find first (less-significant) set bit in a long word.
* @word: The word to search