diff options
| author | Anup Patel <anup.patel@wdc.com> | 2018-12-11 19:24:06 +0530 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2018-12-11 19:24:06 +0530 |
| commit | 9e8ff05cb61f157fb0bcb6b0071d7b6dc0763faa (patch) | |
| tree | b9513a86b3b36e569cb46387846fee9c5544f566 /include/sbi/sbi_const.h | |
Initial commit.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Diffstat (limited to 'include/sbi/sbi_const.h')
| -rw-r--r-- | include/sbi/sbi_const.h | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/include/sbi/sbi_const.h b/include/sbi/sbi_const.h new file mode 100644 index 0000000..3071094 --- /dev/null +++ b/include/sbi/sbi_const.h @@ -0,0 +1,43 @@ +/* + * Copyright (c) 2018 Western Digital Corporation or its affiliates. + * + * Authors: + * Anup Patel <anup.patel@wdc.com> + * + * SPDX-License-Identifier: BSD-2-Clause + */ + +#ifndef __SBI_CONST_H__ +#define __SBI_CONST_H__ + +/* Some constant macros are used in both assembler and + * C code. Therefore we cannot annotate them always with + * 'UL' and other type specifiers unilaterally. We + * use the following macros to deal with this. + * + * Similarly, _AT() will cast an expression with a type in C, but + * leave it unchanged in asm. + */ + +#ifdef __ASSEMBLY__ +#define _AC(X,Y) X +#define _AT(T,X) X +#else +#define __AC(X,Y) (X##Y) +#define _AC(X,Y) __AC(X,Y) +#define _AT(T,X) ((T)(X)) +#endif + +#define _UL(x) (_AC(x, UL)) +#define _ULL(x) (_AC(x, ULL)) + +#define _BITUL(x) (_UL(1) << (x)) +#define _BITULL(x) (_ULL(1) << (x)) + +#define UL(x) (_UL(x)) +#define ULL(x) (_ULL(x)) + +#define __STR(s) #s +#define STRINGIFY(s) __STR(s) + +#endif |