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Improve ARM64 CPU_MATCH

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Add a method to identify CPU based on RAW MIDR value.

Obtained from: Semihalf
Sponsored by:  The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D3117
This commit is contained in:
Zbigniew Bodek 2015-07-21 12:15:00 +00:00
parent 46e834d780
commit 13aaea2fd7
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=285743
1 changed files with 11 additions and 4 deletions
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15
sys/arm64/include/cpu.h
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@ -92,10 +92,17 @@
#define CPU_VAR_MASK (0xf << 20)
#define CPU_REV_MASK (0xf << 0)
#define CPU_MATCH(mask, impl, part, var, rev) \
(((mask) & PCPU_GET(midr)) == (CPU_IMPL_TO_MIDR((impl)) | \
CPU_PART_TO_MIDR((part)) | CPU_VAR_TO_MIDR((var)) | \
CPU_REV_TO_MIDR((rev))))
#define CPU_ID_RAW(impl, part, var, rev) \
(CPU_IMPL_TO_MIDR((impl)) | \
CPU_PART_TO_MIDR((part)) | CPU_VAR_TO_MIDR((var)) | \
CPU_REV_TO_MIDR((rev)))
#define CPU_MATCH(mask, impl, part, var, rev) \
(((mask) & PCPU_GET(midr)) == \
((mask) & CPU_ID_RAW((impl), (part), (var), (rev))))
#define CPU_MATCH_RAW(mask, devid) \
(((mask) & PCPU_GET(midr)) == ((mask) & (devid)))
extern char btext[];
extern char etext[];