[SPARC64]: Sun4v interrupt handling.

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>

1 files changed, 14 insertions, 8 deletions

diff --git a/include/asm-sparc64/cpudata.h b/include/asm-sparc64/cpudata.h
index 492314b53475..7f0a74ec47f6 100644
--- a/include/asm-sparc64/cpudata.h
+++ b/include/asm-sparc64/cpudata.h
@@ -53,16 +53,17 @@ DECLARE_PER_CPU(cpuinfo_sparc, __cpu_data);
  */
 struct thread_info;
 struct trap_per_cpu {
-/* D-cache line 1: Basic thread information */
+/* D-cache line 1: Basic thread information, cpu and device mondo queues */
         struct thread_info      *thread;
         unsigned long           pgd_paddr;
-        unsigned long           __pad1[2];
-
-/* D-cache line 2: Sun4V Mondo Queue pointers */
         unsigned long           cpu_mondo_pa;
         unsigned long           dev_mondo_pa;
+
+/* D-cache line 2: Error Mondo Queue and kernel buffer pointers */
         unsigned long           resum_mondo_pa;
+        unsigned long           resum_kernel_buf_pa;
         unsigned long           nonresum_mondo_pa;
+        unsigned long           nonresum_kernel_buf_pa;
 
 /* Dcache lines 3 and 4: Hypervisor Fault Status */
         struct hv_fault_status  fault_info;
@@ -100,10 +101,12 @@ extern struct sun4v_2insn_patch_entry __sun4v_2insn_patch,
 
 #define TRAP_PER_CPU_THREAD             0x00
 #define TRAP_PER_CPU_PGD_PADDR          0x08
-#define TRAP_PER_CPU_CPU_MONDO_PA       0x20
-#define TRAP_PER_CPU_DEV_MONDO_PA       0x28
-#define TRAP_PER_CPU_RESUM_MONDO_PA     0x30
-#define TRAP_PER_CPU_NONRESUM_MONDO_PA  0x38
+#define TRAP_PER_CPU_CPU_MONDO_PA       0x10
+#define TRAP_PER_CPU_DEV_MONDO_PA       0x18
+#define TRAP_PER_CPU_RESUM_MONDO_PA     0x20
+#define TRAP_PER_CPU_RESUM_KBUF_PA      0x28
+#define TRAP_PER_CPU_NONRESUM_MONDO_PA  0x30
+#define TRAP_PER_CPU_NONRESUM_KBUF_PA   0x38
 #define TRAP_PER_CPU_FAULT_INFO         0x40
 
 #define TRAP_BLOCK_SZ_SHIFT             7
@@ -188,6 +191,9 @@ extern struct sun4v_2insn_patch_entry __sun4v_2insn_patch,
 
 #else
 
+#define __GET_CPUID(REG)                                \
+        mov     0, REG;
+
 /* Uniprocessor versions, we know the cpuid is zero.  */
 #define TRAP_LOAD_PGD_PHYS(DEST, TMP)           \
         sethi   %hi(trap_block), DEST;          \