diff options
author | Atish Patra <atish.patra@wdc.com> | 2019-06-19 00:54:02 +0300 |
---|---|---|
committer | Anup Patel <anup.patel@wdc.com> | 2019-06-19 07:18:54 +0300 |
commit | 98aaf8317b74414afa78078bc056670f46c45f41 (patch) | |
tree | e26aa71b9e3ea232f246fd10a7cfd3fd94578f7a /lib | |
parent | 749b0b093242a4c27f7c4f66121afd7852b2de48 (diff) | |
download | opensbi-98aaf8317b74414afa78078bc056670f46c45f41.tar.xz |
lib: Include helper libc functions directly in libsbi.
libsbi needs some of the custom libc functions. It should be directly
included in libsbi instead of platform specific libraries.
Signed-off-by: Atish Patra <atish.patra@wdc.com>
Acked-by: Anup Patel <anup.patel@wdc.com>
Diffstat (limited to 'lib')
-rw-r--r-- | lib/sbi/libc/objects.mk | 15 | ||||
-rw-r--r-- | lib/sbi/libc/string.c | 175 | ||||
-rw-r--r-- | lib/sbi/objects.mk | 3 | ||||
-rw-r--r-- | lib/sbi/sbi_fifo.c | 2 | ||||
-rw-r--r-- | lib/sbi/sbi_ipi.c | 2 | ||||
-rw-r--r-- | lib/sbi/sbi_tlb.c | 2 |
6 files changed, 193 insertions, 6 deletions
diff --git a/lib/sbi/libc/objects.mk b/lib/sbi/libc/objects.mk new file mode 100644 index 0000000..7a6ebbe --- /dev/null +++ b/lib/sbi/libc/objects.mk @@ -0,0 +1,15 @@ +# +# SPDX-License-Identifier: BSD-2-Clause +# +# Copyright (c) 2019 Western Digital Corporation or its affiliates. +# +# Authors: +# Atish Patra<atish.patra@wdc.com> +# + +libc_files = string.o + +$(foreach file, $(libc_files), \ + $(eval CFLAGS_$(file) = -I$(src)/../../sbi/libc)) + +libsbi-objs-y += $(addprefix libc/,$(libc_files)) diff --git a/lib/sbi/libc/string.c b/lib/sbi/libc/string.c new file mode 100644 index 0000000..b5743fe --- /dev/null +++ b/lib/sbi/libc/string.c @@ -0,0 +1,175 @@ +/* + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright (c) 2019 Western Digital Corporation or its affiliates. + * + * Authors: + * Atish Patra <atish.patra@wdc.com> + */ + +/* + * Simple libc functions. These are not optimized at all and might have some + * bugs as well. Use any optimized routines from newlib or glibc if required. + */ + +#include <sbi/string.h> + +int strcmp(const char *a, const char *b) +{ + /* search first diff or end of string */ + for (; *a == *b && *a != '\0'; a++, b++) + ; + + return *a - *b; +} + +size_t strlen(const char *str) +{ + unsigned long ret = 0; + + while (*str != '\0') { + ret++; + str++; + } + + return ret; +} + +size_t strnlen(const char *str, size_t count) +{ + unsigned long ret = 0; + + while (*str != '\0' && ret < count) { + ret++; + str++; + count--; + } + + return ret; +} + +char *strcpy(char *dest, const char *src) +{ + char *ret = dest; + + while (*src != '\0') { + *dest++ = *src++; + } + + return ret; +} + +char *strncpy(char *dest, const char *src, size_t count) +{ + char *ret = dest; + + while (count-- && *src != '\0') { + *dest++ = *src++; + } + + return ret; +} + +char *strchr(const char *s, int c) +{ + while (*s != '\0' && *s != (char)c) + s++; + + if (*s == '\0') + return NULL; + else + return (char *)s; +} + +char *strrchr(const char *s, int c) +{ + const char *last = s + strlen(s); + + while (last > s && *last != (char)c) + last--; + + if (*last != (char)c) + return NULL; + else + return (char *)last; +} +void *memset(void *s, int c, size_t count) +{ + char *temp = s; + + while (count > 0) { + count--; + *temp++ = c; + } + + return s; +} + +void *memcpy(void *dest, const void *src, size_t count) +{ + char *temp1 = dest; + const char *temp2 = src; + + while (count > 0) { + *temp1++ = *temp2++; + count--; + } + + return dest; +} + +void *memmove(void *dest, const void *src, size_t count) +{ + char *temp1 = (char *)dest; + const char *temp2 = (char *)src; + + if (src == dest) + return dest; + + if (dest < src) { + while (count > 0) { + *temp1++ = *temp2++; + count--; + } + } else { + temp1 = dest + count - 1; + temp2 = src + count - 1; + + while (count > 0) { + *temp1-- = *temp2--; + count--; + } + } + + return dest; +} + +int memcmp(const void *s1, const void *s2, size_t count) +{ + const char *temp1 = s1; + const char *temp2 = s2; + + for (; count > 0 && (*temp1 == *temp2); count--) { + temp1++; + temp2++; + } + + if (count > 0) + return *(unsigned char *)temp1 - *(unsigned char *)temp2; + else + return 0; +} + +void *memchr(const void *s, int c, size_t count) +{ + const unsigned char *temp = s; + + while (count > 0) { + if ((unsigned char)c == *temp++) { + return (void *)(temp - 1); + } + count--; + } + + return NULL; +} diff --git a/lib/sbi/objects.mk b/lib/sbi/objects.mk index 817e805..d0fd856 100644 --- a/lib/sbi/objects.mk +++ b/lib/sbi/objects.mk @@ -27,6 +27,3 @@ libsbi-objs-y += sbi_system.o libsbi-objs-y += sbi_timer.o libsbi-objs-y += sbi_tlb.o libsbi-objs-y += sbi_trap.o - -# External Libraries to include -PLATFORM_INCLUDE_LIBC=y diff --git a/lib/sbi/sbi_fifo.c b/lib/sbi/sbi_fifo.c index a92b46c..e823d2a 100644 --- a/lib/sbi/sbi_fifo.c +++ b/lib/sbi/sbi_fifo.c @@ -10,7 +10,7 @@ #include <sbi/riscv_locks.h> #include <sbi/sbi_error.h> #include <sbi/sbi_fifo.h> -#include <plat/string.h> +#include <sbi/string.h> void sbi_fifo_init(struct sbi_fifo *fifo, void *queue_mem, u16 entries, u16 entry_size) diff --git a/lib/sbi/sbi_ipi.c b/lib/sbi/sbi_ipi.c index 48d5b22..19da029 100644 --- a/lib/sbi/sbi_ipi.c +++ b/lib/sbi/sbi_ipi.c @@ -19,7 +19,7 @@ #include <sbi/sbi_platform.h> #include <sbi/sbi_timer.h> #include <sbi/sbi_tlb.h> -#include <plat/string.h> +#include <sbi/string.h> static unsigned long ipi_data_off; diff --git a/lib/sbi/sbi_tlb.c b/lib/sbi/sbi_tlb.c index 814d402..1031df3 100644 --- a/lib/sbi/sbi_tlb.c +++ b/lib/sbi/sbi_tlb.c @@ -16,7 +16,7 @@ #include <sbi/sbi_bitops.h> #include <sbi/sbi_scratch.h> #include <sbi/sbi_tlb.h> -#include <plat/string.h> +#include <sbi/string.h> static unsigned long ipi_tlb_fifo_off; static unsigned long ipi_tlb_fifo_mem_off; |