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authorDavid S. Miller <davem@sunset.davemloft.net>2006-02-09 02:52:44 -0800
committerDavid S. Miller <davem@sunset.davemloft.net>2006-03-20 01:12:03 -0800
commitd82ace7dc4073b090a55b9740700e32b9a9ae302 (patch)
treed5aa8e10664b05bbfe31eacf95e2066c03cab102 /arch/sparc64/kernel/cpu.c
parent1d2f1f90a1e004b0c1b8a73ed4394a93f09104b3 (diff)
[SPARC64]: Detect sun4v early in boot process.
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>
Diffstat (limited to 'arch/sparc64/kernel/cpu.c')
-rw-r--r--arch/sparc64/kernel/cpu.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/sparc64/kernel/cpu.c b/arch/sparc64/kernel/cpu.c
index 00eed88ef2e..c7a4fb39702 100644
--- a/arch/sparc64/kernel/cpu.c
+++ b/arch/sparc64/kernel/cpu.c
@@ -71,6 +71,12 @@ void __init cpu_probe(void)
unsigned long ver, fpu_vers, manuf, impl, fprs;
int i;
+ if (tlb_type == hypervisor) {
+ sparc_cpu_type = "UltraSparc T1 (Niagara)";
+ sparc_fpu_type = "UltraSparc T1 integrated FPU";
+ return;
+ }
+
fprs = fprs_read();
fprs_write(FPRS_FEF);
__asm__ __volatile__ ("rdpr %%ver, %0; stx %%fsr, [%1]"