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Code Issues Releases Activity

Add logic for handling new-style ARM cpu ID info.

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Submitted by:	Michal Meloun <meloun@miracle.cz>
This commit is contained in:
Ian Lepore 2015-02-14 18:54:52 +00:00
parent 270d667cd2
commit 8e6dd301f0
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=278770
1 changed files with 6 additions and 2 deletions
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6
sys/arm/arm/cpuinfo.c
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@ -58,9 +58,13 @@ cpuinfo_init(void)
/* ARMv4T CPU */
cpuinfo.architecture = 1;
cpuinfo.revision = (cpuinfo.midr >> 16) & 0x7F;
} else {
/* ARM new id scheme */
cpuinfo.architecture = (cpuinfo.midr >> 16) & 0x0F;
cpuinfo.revision = (cpuinfo.midr >> 20) & 0x0F;
}
} else {
/* must be new id scheme */
/* non ARM -> must be new id scheme */
cpuinfo.architecture = (cpuinfo.midr >> 16) & 0x0F;
cpuinfo.revision = (cpuinfo.midr >> 20) & 0x0F;
}