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[SPARC64]: Use ASI_SCRATCHPAD address 0x0 properly.

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This is where the virtual address of the fault status
area belongs.

To set it up we don't make a hypervisor call, instead
we call OBP's SUNW,set-trap-table with the real address
of the fault status area as the second argument.  And
right before that call we write the virtual address into
ASI_SCRATCHPAD vaddr 0x0.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2006-02-10 15:39:51 -08:00
parent 1839794464
commit 12eaa328f9
9 changed files with 144 additions and 192 deletions
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22
arch/sparc64/mm/init.c
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@ -1109,24 +1109,6 @@ static void __init tsb_phys_patch(void)
}
}
/* Register this cpu's fault status area with the hypervisor. */
void __cpuinit sun4v_register_fault_status(void)
{
register unsigned long func asm("%o5");
register unsigned long arg0 asm("%o0");
int cpu = hard_smp_processor_id();
struct trap_per_cpu *tb = &trap_block[cpu];
unsigned long pa;
pa = kern_base + ((unsigned long) tb - KERNBASE);
func = HV_FAST_MMU_FAULT_AREA_CONF;
arg0 = pa;
__asm__ __volatile__("ta %4"
: "=&r" (func), "=&r" (arg0)
: "0" (func), "1" (arg0),
"i" (HV_FAST_TRAP));
}
/* paging_init() sets up the page tables */
extern void cheetah_ecache_flush_init(void);
@ -1147,10 +1129,8 @@ void __init paging_init(void)
tlb_type == hypervisor)
tsb_phys_patch();
if (tlb_type == hypervisor) {
if (tlb_type == hypervisor)
sun4v_patch_tlb_handlers();
sun4v_register_fault_status();
}
/* Find available physical memory... */
read_obp_memory("available", &pavail[0], &pavail_ents);