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authorJonathan Neuschäfer <j.neuschaefer@gmx.net>2016-05-27 09:05:02 +0200
committerMartin Roth <martinroth@google.com>2016-05-31 21:07:03 +0200
commit4acb0e774220c0705a71689b6620c976297d417c (patch)
tree1dfb1d5df4c4370739f3812088669293ddd80c39 /src
parent0a54fb533d9b03ba4ad24bfc9180ee5803feef51 (diff)
commonlib/lz4: Avoid unaligned memory access on RISC-V
From the User-Level ISA Specification v2.0: "We do not mandate atomicity for misaligned accesses so simple implementations can just use a machine trap and software handler to handle misaligned accesses." (— http://riscv.org/specifications/) Spike traps on unaligned accesses. Change-Id: Ia57786916f4076cc08513f4e331c2deec9cfa785 Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/14983 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'src')
-rw-r--r--src/commonlib/lz4_wrapper.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/commonlib/lz4_wrapper.c b/src/commonlib/lz4_wrapper.c
index 772f7918f4..93fa7e8e1d 100644
--- a/src/commonlib/lz4_wrapper.c
+++ b/src/commonlib/lz4_wrapper.c
@@ -63,6 +63,11 @@ static void LZ4_copy8(void *dst, const void *src)
: [src]"r"(src), [dst]"r"(dst)
: "memory" );
#endif
+#elif defined(__riscv__)
+ /* RISC-V implementations may trap on any unaligned access. */
+ int i;
+ for (i = 0; i < 8; i++)
+ ((uint8_t *)dst)[i] = ((uint8_t *)src)[i];
#else
*(uint64_t *)dst = *(const uint64_t *)src;
#endif