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2006-03-20[SPARC64]: Fix some SUN4V TLB miss bugs.David S. Miller
Code patching did not sign extend negative branch offsets correctly. Kernel TLB miss path needs patching and %g4 register preservation in order to handle SUN4V correctly. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: Fix typo in sun4v_patch().David S. Miller
Second instruction offset is '4' not '3'. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: Fix sun4v early bootup.David S. Miller
prom_sun4v_name should be "sun4v" not "SUNW,sun4v" Also, this is too early to make use of the .sun4v_Xinsn_patch code patching, so just check things manually. This gets us at least to prom_init() on Niagara. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: Fix some Niagara memcpy() bugs.David S. Miller
We need to restore the %asi register properly. For the kernel this means get_fs(), for user this means ASI_PNF. Also, NGcopy_to_user.S was including U3memcpy.S instead of NGmemcpy.S, oops :-) Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: Handle hypervisor case correctly in copy_tsb().David S. Miller
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: Add SUN4V Hypervisor Console driver.David S. Miller
Since it can do things like BREAK and HUP, we implement this as a serial uart driver. This still needs interrupt probing code, as I haven't figured out how interrupts will work or be probed for on SUN4V yet. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: Fetch bootup time of day from Hypervisor.David S. Miller
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: Simplify sun4v TLB handling using macros.David S. Miller
There was also a bug in sun4v_itlb_miss, it loaded the MMU Fault Status base into %g3 instead of %g2. This pointed out a fast path for TSB miss processing, since we have %g2 with the MMU Fault Status base, we can use that to quickly load up the PGD phys address. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: Use ASI_SCRATCHPAD address 0x0 properly.David S. Miller
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>
2006-03-20[SPARC64]: First cut at SUN4V PCI IOMMU handling.David S. Miller
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: Fix hypervisor call arg passing.David S. Miller
Function goes in %o5, args go in %o0 --> %o5. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: Add HV_PCI_TSBID() macro.David S. Miller
For constructing hypervisor PCI TSB IDs. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: Implement SUN4V PCI config space access.David S. Miller
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: More SUN4V PCI controller work.David S. Miller
Add assembler file for PCI hypervisor calls. Setup basic skeleton of SUN4V PCI controller driver. Add 32-bit devhandle to PBM struct, as this is needed for hypervisor calls. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: Beginnings of SUN4V PCI controller support.David S. Miller
Abstract out IOMMU operations so that we can have a different set of calls on sun4v, which needs to do things through hypervisor calls. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: Fetch cpu mid properly on sun4v.David S. Miller
If there is a "cpuid" property, use that. Else suck it out of the top bits of the "reg" property. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC]: Clean up idprom header files.David S. Miller
Delete unused macros, and use fixed sized types in sparc32 header. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: SUN4V memory exception trap handlers.David S. Miller
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: Hypervisor TSB context switching.David S. Miller
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: Implement sun4v TSB miss handlers.David S. Miller
When we register a TSB with the hypervisor, so that it or hardware can handle TLB misses and do the TSB walk for us, the hypervisor traps down to these trap when it incurs a TSB miss. Processing is simple, we load the missing virtual address and context, and do a full page table walk. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: kernel/cpu.c needs asm/spitfire.hDavid S. Miller
For 'tlb_type'. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: Print ARCH as SUN4V when tlb_type is hypervisor.David S. Miller
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: Detect sun4v early in boot process.David S. Miller
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>
2006-03-20[SPARC64]: Sun4v cross-call sending support.David S. Miller
Technically the hypervisor call supports sending in a list of all cpus to get the cross-call, but I only pass in one cpu at a time for now. The multi-cpu support is there, just ifdef'd out so it's easy to enable or delete it later. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: Sun4v interrupt handling.David S. Miller
Sun4v has 4 interrupt queues: cpu, device, resumable errors, and non-resumable errors. A set of head/tail offset pointers help maintain a work queue in physical memory. The entries are 64-bytes in size. Each queue is allocated then registered with the hypervisor as we bring cpus up. The two error queues each get a kernel side buffer that we use to quickly empty the main interrupt queue before we call up to C code to log the event and possibly take evasive action. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: Allocate and register the 4 sun4v mondo queues at bootup.David S. Miller
Needs to occur before we enable PSTATE_IE in %pstate. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: Verify all trap_per_cpu assembler offsets in trap_init()David S. Miller
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: Add sun4v mondo queue bases to struct trap_per_cpu.David S. Miller
Also, correct TRAP_PER_CPU_FAULT_INFO define, it should be 0x40 not 0x20. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: Fix some comment typos in asm/hypervisor.hDavid S. Miller
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: Patch up mmu context register writes for sun4v.David S. Miller
sun4v uses ASI_MMU instead of ASI_DMMU Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: Register per-cpu fault status area with sun4v hypervisor.David S. Miller
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: asm/cpudata.h needs asm/asi.hDavid S. Miller
For the expansion of __GET_CPUID() on SMP. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: Niagara copy/clear page.David S. Miller
Happily we have no D-cache aliasing issues on these chips, so the implementation is very straightforward. Add a stub in bootup which will be where the patching calls will be made for niagara/sun4v/hypervisor. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: Rename gl_{1,2}insn_patch --> sun4v_{1,2}insn_patchDavid S. Miller
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: Initial sun4v TLB miss handling infrastructure.David S. Miller
Things are a little tricky because, unlike sun4u, we have to: 1) do a hypervisor trap to do the TLB load. 2) do the TSB lookup calculations by hand Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: Add missing memory barriers to instruction patching functions.David S. Miller
V9 requires a write memory barrier before the instruction flush. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: Sanitize %pstate writes for sun4v.David S. Miller
If we're just switching between different alternate global sets, nop it out on sun4v. Also, get rid of all of the alternate global save/restore in the OBP CIF trampoline code. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: Kill all %pstate changes in context switch code.David S. Miller
They are totally unnecessary because: 1) Interrupts are already disabled when switch_to() runs. 2) We don't use hard-coded alternate globals any longer. This found a case in rtrap, which still assumed alternate global %g6 was current_thread_info(), and that is fixed by this changeset as well. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: Add initial code to twiddle %gl on trap entry/exit.David S. Miller
Instead of setting/clearing PSTATE_AG we have to change the %gl register value on sun4v. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: Fill dead cycles on trap entry with real work.David S. Miller
As we save trap state onto the stack, the store buffer fills up mid-way through and we stall for several cycles as the store buffer trickles out to the L2 cache. Meanwhile we can do some privileged register reads and other calculations, essentially for free. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: Add define for "GL" field of sun4v %tstate register.David S. Miller
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: Add sun4v case to __GET_CPUID() patch tables.David S. Miller
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: Sun4v interrupt queue register definitions.David S. Miller
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: Sun4v scratchpad register layout.David S. Miller
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: Sun4v specific ASI defines.David S. Miller
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: Niagara optimized memcpy() and copy_{to,from}_user().David S. Miller
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: Add Niagara init-store twin-load ASI defines.David S. Miller
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: Add some hypervisor tlb_type checks.David S. Miller
And more consistently check cheetah{,_plus} instead of assuming anything not spitfire is cheetah{,_plus}. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: Add 'hypervisor' to ultra_tlb_type enumeration.David S. Miller
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[SPARC64]: SUN4V hypervisor TLB flush support code.David S. Miller
Signed-off-by: David S. Miller <davem@davemloft.net>
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