Skip to main content

Browse the archive

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 
ACPI: disable ACPI cleanly when bad RSDP found
 
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
sbus.h 
/*
 * some sbus structures and macros to make usage of sbus drivers possible
 */

#ifndef __M68K_SBUS_H
#define __M68K_SBUS_H

struct sbus_dev {
	struct {
		unsigned int which_io;
		unsigned int phys_addr;
	} reg_addrs[1];
};

/* sbus IO functions stolen from include/asm-sparc/io.h for the serial driver */
/* No SBUS on the Sun3, kludge -- sam */

static inline void _sbus_writeb(unsigned char val, unsigned long addr)
{
	*(volatile unsigned char *)addr = val;
}

static inline unsigned char _sbus_readb(unsigned long addr)
{
	return *(volatile unsigned char *)addr;
}

static inline void _sbus_writel(unsigned long val, unsigned long addr)
{
	*(volatile unsigned long *)addr = val;

}

extern inline unsigned long _sbus_readl(unsigned long addr)
{
	return *(volatile unsigned long *)addr;
}


#define sbus_readb(a) _sbus_readb((unsigned long)a)
#define sbus_writeb(v, a) _sbus_writeb(v, (unsigned long)a)
#define sbus_readl(a) _sbus_readl((unsigned long)a)
#define sbus_writel(v, a) _sbus_writel(v, (unsigned long)a)

#endif
back to top