Bug 3619
| Summary: | Implement ACPI 3.0 Timer function | ||
|---|---|---|---|
| Product: | ACPI | Reporter: | Len Brown (lenb) |
| Component: | Other | Assignee: | Luming Yu (luming.yu) |
| Status: | CLOSED CODE_FIX | ||
| Severity: | normal | CC: | acpi-bugzilla, bunk |
| Priority: | P2 | ||
| Hardware: | i386 | ||
| OS: | Linux | ||
| Kernel Version: | 2.6.9 | Subsystem: | |
| Regression: | --- | Bisected commit-id: | |
This patch is already included in recent kernels. |
With ACPICA 20040924 the interpreter recognizes the "Timer" operand, but the OS layer has just a stub at this point to supply the 64-bit timer value: 1.56/drivers/acpi/osl.c 2004-10-22 16:11:56 -04:00 +++ 1.57/drivers/acpi/osl.c 2004-10-22 21:59:54 -04:00 @@ -326,6 +326,29 @@ } } +/* + * Support ACPI 3.0 AML Timer operand + * Returns 64-bit free-running, monotonically increasing timer + * with 100ns granularity + */ +u64 +acpi_os_get_timer (void) +{ + static u64 t; + +#ifdef CONFIG_HPET + /* TBD: use HPET if available */ +#endif + +#ifdef CONFIG_X86_PM_TIMER + /* TBD: default to PM timer if HPET was not available */ +#endif + if (!t) + printk(KERN_ERR PREFIX "acpi_os_get_timer() TBD\n"); + + return(++t); +} + acpi_status acpi_os_read_port( acpi_io_address port,