The branch stable/14 has been updated by andrew: URL: https://cgit.FreeBSD.org/src/commit/?id=7cd4ec4adb8f3727f59b6208b9e3bcc6c0bf30c0
commit 7cd4ec4adb8f3727f59b6208b9e3bcc6c0bf30c0 Author: Andrew Turner <[email protected]> AuthorDate: 2025-09-04 14:57:41 +0000 Commit: Andrew Turner <[email protected]> CommitDate: 2026-01-14 21:14:15 +0000 arm64: Add a function to check a range of CPU revs Add a function that can check if a given midr is within a range of revisions. This will be used to check if a CPU is affected by a known erratum. Sponsored by: Arm Ltd Differential Revision: https://reviews.freebsd.org/D52187 (cherry picked from commit c76b0247a95ed090cc0d83b2698228d2937af3e6) --- sys/arm64/include/cpu.h | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/sys/arm64/include/cpu.h b/sys/arm64/include/cpu.h index dbb92d75dd85..f61f727315a6 100644 --- a/sys/arm64/include/cpu.h +++ b/sys/arm64/include/cpu.h @@ -202,6 +202,31 @@ #define CPU_MATCH_RAW(mask, devid) \ (((mask) & PCPU_GET(midr)) == ((mask) & (devid))) +#if !defined(__ASSEMBLER__) +static inline bool +midr_check_var_part_range(u_int midr, u_int impl, u_int part, u_int var_low, + u_int part_low, u_int var_high, u_int part_high) +{ + /* Check for the correct part */ + if (CPU_IMPL(midr) != impl || CPU_PART(midr) != part) + return (false); + + /* Check if the variant is between var_low and var_high inclusive */ + if (CPU_VAR(midr) < var_low || CPU_VAR(midr) > var_high) + return (false); + + /* If the variant is the low value, check if the part is high enough */ + if (CPU_VAR(midr) == var_low && CPU_PART(midr) < part_low) + return (false); + + /* If the variant is the high value, check if the part is low enough */ + if (CPU_VAR(midr) == var_high && CPU_PART(midr) > part_high) + return (false); + + return (true); +} +#endif + /* * Chip-specific errata. This defines are intended to be * booleans used within if statements. When an appropriate
