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riscv: Add Zbb support for building U-Boot

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This patch adds ISA string to the -march to generate zbb instructions
for U-Boot binaries, along with optimized string functions introduced
from Linux kernel.

Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
This commit is contained in:
Yu Chien Peter Lin 2023-08-09 18:49:30 +08:00 • committed by Leo Yu-Chi Liang
parent 03a4504659
commit bc5a50452b
7 changed files with 392 additions and 1 deletions
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18
arch/riscv/include/asm/string.h
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@ -40,4 +40,22 @@ extern void *memmove(void *, const void *, __kernel_size_t);
#endif
extern void *memset(void *, int, __kernel_size_t);
#undef __HAVE_ARCH_STRLEN
#if CONFIG_IS_ENABLED(USE_ARCH_STRLEN)
#define __HAVE_ARCH_STRLEN
#endif
extern __kernel_size_t strlen(const char *);
#undef __HAVE_ARCH_STRCMP
#if CONFIG_IS_ENABLED(USE_ARCH_STRCMP)
#define __HAVE_ARCH_STRCMP
#endif
extern int strcmp(const char *, const char *);
#undef __HAVE_ARCH_STRNCMP
#if CONFIG_IS_ENABLED(USE_ARCH_STRNCMP)
#define __HAVE_ARCH_STRNCMP
#endif
extern int strncmp(const char *, const char *, size_t __kernel_size_t);
#endif /* __ASM_RISCV_STRING_H */