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[time] Add support for the ACPI power management timer

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Allow the ACPI power management timer to be used if enabled via
TIMER_ACPI in config/timer.h.  This provides an alternative timer on
systems where the standard 8254 PIT is unavailable or unreliable.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2018-03-20 17:26:49 +02:00
parent e8e9ca3613
commit 3ec2079ce2
4 changed files with 147 additions and 0 deletions
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src/arch/x86/include/bits/errfile.h
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@@ -27,6 +27,7 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
#define ERRFILE_acpipwr ( ERRFILE_ARCH | ERRFILE_CORE | 0x00100000 )
#define ERRFILE_cpuid ( ERRFILE_ARCH | ERRFILE_CORE | 0x00110000 )
#define ERRFILE_rdtsc_timer ( ERRFILE_ARCH | ERRFILE_CORE | 0x00120000 )
#define ERRFILE_acpi_timer ( ERRFILE_ARCH | ERRFILE_CORE | 0x00130000 )
#define ERRFILE_bootsector ( ERRFILE_ARCH | ERRFILE_IMAGE | 0x00000000 )
#define ERRFILE_bzimage ( ERRFILE_ARCH | ERRFILE_IMAGE | 0x00010000 )