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[SPARC64]: Detect sun4v early in boot process.

Browse source 
We look for "SUNW,sun4v" in the 'compatible' property
of the root OBP device tree node.

Protect every %ver register access, to make sure it is
not touched on sun4v, as %ver is hyperprivileged there.

Lock kernel TLB entries using hypervisor calls instead of
calls into OBP.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2006-02-09 02:52:44 -08:00
parent 1d2f1f90a1
commit d82ace7dc4
12 changed files with 276 additions and 83 deletions
Download patch file Download diff file Expand all files Collapse all files

58
arch/sparc64/mm/init.c
View file

@ -514,6 +514,29 @@ static void __init read_obp_translations(void)
}
}
static void __init hypervisor_tlb_lock(unsigned long vaddr,
unsigned long pte,
unsigned long mmu)
{
register unsigned long func asm("%o0");
register unsigned long arg0 asm("%o1");
register unsigned long arg1 asm("%o2");
register unsigned long arg2 asm("%o3");
register unsigned long arg3 asm("%o4");
func = HV_FAST_MMU_MAP_PERM_ADDR;
arg0 = vaddr;
arg1 = 0;
arg2 = pte;
arg3 = mmu;
__asm__ __volatile__("ta 0x80"
: "=&r" (func), "=&r" (arg0),
"=&r" (arg1), "=&r" (arg2),
"=&r" (arg3)
: "0" (func), "1" (arg0), "2" (arg1),
"3" (arg2), "4" (arg3));
}
static void __init remap_kernel(void)
{
unsigned long phys_page, tte_vaddr, tte_data;
@ -527,19 +550,30 @@ static void __init remap_kernel(void)
kern_locked_tte_data = tte_data;
/* Now lock us into the TLBs via OBP. */
prom_dtlb_load(tlb_ent, tte_data, tte_vaddr);
prom_itlb_load(tlb_ent, tte_data, tte_vaddr);
if (bigkernel) {
tlb_ent -= 1;
prom_dtlb_load(tlb_ent,
tte_data + 0x400000,
tte_vaddr + 0x400000);
prom_itlb_load(tlb_ent,
tte_data + 0x400000,
tte_vaddr + 0x400000);
/* Now lock us into the TLBs via Hypervisor or OBP. */
if (tlb_type == hypervisor) {
hypervisor_tlb_lock(tte_vaddr, tte_data, HV_MMU_DMMU);
hypervisor_tlb_lock(tte_vaddr, tte_data, HV_MMU_IMMU);
if (bigkernel) {
tte_vaddr += 0x400000;
tte_data += 0x400000;
hypervisor_tlb_lock(tte_vaddr, tte_data, HV_MMU_DMMU);
hypervisor_tlb_lock(tte_vaddr, tte_data, HV_MMU_IMMU);
}
} else {
prom_dtlb_load(tlb_ent, tte_data, tte_vaddr);
prom_itlb_load(tlb_ent, tte_data, tte_vaddr);
if (bigkernel) {
tlb_ent -= 1;
prom_dtlb_load(tlb_ent,
tte_data + 0x400000,
tte_vaddr + 0x400000);
prom_itlb_load(tlb_ent,
tte_data + 0x400000,
tte_vaddr + 0x400000);
}
sparc64_highest_unlocked_tlb_ent = tlb_ent - 1;
}
sparc64_highest_unlocked_tlb_ent = tlb_ent - 1;
if (tlb_type == cheetah_plus) {
sparc64_kern_pri_context = (CTX_CHEETAH_PLUS_CTX0 |
CTX_CHEETAH_PLUS_NUC);