[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>
diff --git a/include/asm-sparc64/cpudata.h b/include/asm-sparc64/cpudata.h
index 492314b..7f0a74e 100644
--- a/include/asm-sparc64/cpudata.h
+++ b/include/asm-sparc64/cpudata.h
@@ -53,16 +53,17 @@
*/
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 @@
#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 @@
#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; \