862993757a
RTC clock hardware frequently uses BCD numbers. Currently the low-level bcd2bin() and bin2bcd() functions will KASSERT if given out-of-range BCD values. Every RTC driver must implement its own code for validating the unreliable data coming from the hardware to avoid a potential kernel panic. This change introduces two new functions, clock_bcd_to_ts() and clock_ts_to_bcd(). The former validates its inputs and returns EINVAL if any values are out of range. The latter guarantees the returned data will be valid BCD in a known format (4-digit years, etc). A new bcd_clocktime structure is used with the new functions. It is similar to the original clocktime structure, but defines the fields holding BCD values as uint8_t (uint16_t for year), and adds a PM flag for handling hours using AM/PM mode. PR: 224813 Differential Revision: https://reviews.freebsd.org/D13730 (no reviewers) |
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| bin | ||
| cddl | ||
| contrib | ||
| crypto | ||
| etc | ||
| gnu | ||
| include | ||
| kerberos5 | ||
| lib | ||
| libexec | ||
| release | ||
| rescue | ||
| sbin | ||
| secure | ||
| share | ||
| stand | ||
| sys | ||
| targets | ||
| tests | ||
| tools | ||
| usr.bin | ||
| usr.sbin | ||
| .arcconfig | ||
| .arclint | ||
| .gitattributes | ||
| .gitignore | ||
| COPYRIGHT | ||
| LOCKS | ||
| MAINTAINERS | ||
| Makefile | ||
| Makefile.inc1 | ||
| Makefile.libcompat | ||
| Makefile.sys.inc | ||
| ObsoleteFiles.inc | ||
| README | ||
| README.md | ||
| UPDATING | ||
FreeBSD Source:
This is the top level of the FreeBSD source directory. This file
was last revised on:
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For copyright information, please see the file COPYRIGHT in this directory (additional copyright information also exists for some sources in this tree - please see the specific source directories for more information).
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The buildkernel and installkernel targets build and install
the kernel and the modules (see below). Please see the top of
the Makefile in this directory for more information on the
standard build targets and compile-time flags.
Building a kernel is a somewhat more involved process. See build(7), config(8), and https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig.html for more information.
Note: If you want to build and install the kernel with the
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