diff options
| author | cinap_lenrek <cinap_lenrek@centraldogma> | 2011-08-27 07:42:13 +0200 |
|---|---|---|
| committer | cinap_lenrek <cinap_lenrek@centraldogma> | 2011-08-27 07:42:13 +0200 |
| commit | c8168fd3bcd752264dd1a52c44c816bc9b22bf9d (patch) | |
| tree | 45fe89835a2d538ef6fb130438bc9dc6b13e91bb /sys/man/3 | |
| parent | 78e19b52bf09a480341b89914b9835b3c3d5e78c (diff) | |
arch(3): document msr
Diffstat (limited to 'sys/man/3')
| -rw-r--r-- | sys/man/3/arch | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/sys/man/3/arch b/sys/man/3/arch index 7cd5e82fb..413ef9d08 100644 --- a/sys/man/3/arch +++ b/sys/man/3/arch @@ -12,6 +12,7 @@ arch \- architecture-specific information and control .B /dev/iol .B /dev/iow .B /dev/irqalloc +.B /dev/msr .SH DESCRIPTION This device presents textual information about PC hardware and allows user-level control of the I/O ports on x86-class and DEC Alpha machines. @@ -116,11 +117,15 @@ Reads and writes to .IR iob , .IR iow , and -.I iol +.IR iol cause 8-bit wide, 16-bit wide, and 32-bit wide requests to I/O ports. The port accessed is determined by the byte offset of the file descriptor. +.PP +Reads and writes to +.I msr +go to the P4/P6/Core/Core2/AMD64 MSRs. .SH EXAMPLE The following code reads from an x86 byte I/O port. .IP |