Revision 9e3a9d1ed8cc8db93e5c53e9a5b09065bd95de8b authored by Len Brown on 06 February 2009, 19:00:56 UTC, committed by Len Brown on 06 February 2009, 19:00:56 UTC
When ACPI is disabled in the BIOS of this VIA C3 box,
it invalidates the RSDP, which Linux notices:

ACPI Error (tbxfroot-0218): A valid RSDP was not found [20080926]

Bug Linux neglected to disable ACPI at that stage,
and later scribbled on smp_found_config:

ACPI: No APIC-table, disabling MPS

But this box doesn't run well in legacy PIC mode,
it needed IOAPIC mode to perform correctly:

http://lkml.org/lkml/2009/2/5/39

So exit ACPI mode cleanly when we first detect
that it is hopeless.

Signed-off-by: Len Brown <len.brown@intel.com>
1 parent f3b39f1
Raw File
hwtest.h
/* Routines to test for presence/absence of hardware registers:
 * see arch/m68k/mm/hwtest.c.
 *  -- PMM <pmaydell@chiark.greenend.org.uk> 05/1998
 *
 * Removed __init from decls.  We might want them in modules, and
 * the code is tiny anyway.  16/5/98 pb
 */

#ifndef __ASM_HWTEST_H
#define __ASM_HWTEST_H

extern int hwreg_present(volatile void *regp);
extern int hwreg_write(volatile void *regp, unsigned short val);

#endif
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