• John Keller's avatar
    ACPI: Altix: reinitialize acpi tables · 3fd0b2d9
    John Keller authored
    To provide compatibilty with SN kernels that do and do not
    have ACPI IO support, the SN PROM must build different
    versions of some ACPI tables based on which kernel is booting.
    As such, the tables may have to change at kernel boot time.
    By default, prior to kernel boot, the PROM builds an empty
    DSDT (header only) and no SSDTs. If an ACPI capable kernel
    boots, the kernel will notify the PROM, at platform setup time,
    and the PROM will build full DSDT and SSDT tables.
    
    With the latest changes to acpi_table_init(), the table lengths
    are saved, and when our PROM changes them, the changes are not seen,
    and the kernel will crash on boot. Because of issues with kexec support,
    we are not able to create the tables prior to acpi_table_init().
    As a result, we are making a second call to acpi_table_init() to
    process the rebuilt DSDT and SSDTs.
    Signed-off-by: default avatarJohn Keller <jpk@sgi.com>
    Signed-off-by: default avatarLen Brown <len.brown@intel.com>
    3fd0b2d9
setup.c 20.6 KB