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author | Hung-Te Lin <hungte@chromium.org> | 2020-04-15 20:54:14 +0800 |
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committer | Patrick Georgi <pgeorgi@google.com> | 2020-04-20 06:20:50 +0000 |
commit | 85ecdb1471dd695997166f447f786ed500d091b9 (patch) | |
tree | 19955f93d8ee0872a57b389c7bf1cff11d5bd518 /src/mainboard/google/volteer/variants | |
parent | 38e386f2d0255fdc424b0efe73585ea4ab9e8b1b (diff) |
mmio: Fix failure in bit field macro when accessing >30 bits
For bit fields with 31 bits (e.g: DEFINE_BITFIELD(MYREG, 30, 0) ),
the calculation of mask value will go overflow:
"error: integer overflow in expression '-2147483648 - 1' of
type 'int' results in '2147483647'".
And for bit fields with 32 bits (e.g: DEFINE_BITFIELD(MYREG, 31, 0) ),
the error will be:
"error: left shift count >= width of type [-Werror=shift-count-overflow]"
To fix these issues, the bit field macros should always use unsigned
integers, and use 64bit integer when creating mask value.
Change-Id: Ie3cddf9df60b83de4e21243bfde6b79729fb06ef
Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40404
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
Diffstat (limited to 'src/mainboard/google/volteer/variants')
0 files changed, 0 insertions, 0 deletions