1e4c85f97f
Commit f2b36db692 causes a bootup hang on
at least one machine. Revert for now until we understand why. The old
code may be ugly, but it works.
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
45 lines
1013 B
C
45 lines
1013 B
C
/* two abstractions specific to kernel/smpboot.c, mainly to cater to visws
|
|
* which needs to alter them. */
|
|
|
|
static inline void smpboot_clear_io_apic_irqs(void)
|
|
{
|
|
io_apic_irqs = 0;
|
|
}
|
|
|
|
static inline void smpboot_setup_warm_reset_vector(unsigned long start_eip)
|
|
{
|
|
CMOS_WRITE(0xa, 0xf);
|
|
local_flush_tlb();
|
|
Dprintk("1.\n");
|
|
*((volatile unsigned short *) TRAMPOLINE_HIGH) = start_eip >> 4;
|
|
Dprintk("2.\n");
|
|
*((volatile unsigned short *) TRAMPOLINE_LOW) = start_eip & 0xf;
|
|
Dprintk("3.\n");
|
|
}
|
|
|
|
static inline void smpboot_restore_warm_reset_vector(void)
|
|
{
|
|
/*
|
|
* Install writable page 0 entry to set BIOS data area.
|
|
*/
|
|
local_flush_tlb();
|
|
|
|
/*
|
|
* Paranoid: Set warm reset code and vector here back
|
|
* to default values.
|
|
*/
|
|
CMOS_WRITE(0, 0xf);
|
|
|
|
*((volatile long *) phys_to_virt(0x467)) = 0;
|
|
}
|
|
|
|
static inline void smpboot_setup_io_apic(void)
|
|
{
|
|
/*
|
|
* Here we can be sure that there is an IO-APIC in the system. Let's
|
|
* go and set it up:
|
|
*/
|
|
if (!skip_ioapic_setup && nr_ioapics)
|
|
setup_IO_APIC();
|
|
}
|