Add HMER access syscalls (as fastpath).

Change-Id: Icc7494986d19950a18cc9ee53fd5125c86096a72
Reviewed-on: http://gfw160.austin.ibm.com:8080/gerrit/105
Tested-by: Jenkins Server
Reviewed-by: Douglas R. Gilbert <dgilbert@us.ibm.com>
Reviewed-by: Andrew J. Geissler <andrewg@us.ibm.com>

2 files changed, 10 insertions, 4 deletions

diff --git a/src/lib/syscall_mmio.C b/src/lib/syscall_mmio.C
index f2dc8ccf8..30ec5bd37 100644
--- a/src/lib/syscall_mmio.C
+++ b/src/lib/syscall_mmio.C
@@ -12,3 +12,13 @@ int mmio_unmap(void* ea, size_t pages)
 {
     return (int64_t) _syscall2(MMIO_UNMAP, ea, (void*)pages);
 }
+
+uint64_t mmio_hmer_read()
+{
+    return (uint64_t) _syscall0(MMIO_HMER_READ);
+}
+
+int mmio_hmer_write(uint64_t value)
+{
+    return (int)(int64_t)_syscall1(MMIO_HMER_WRITE, (void*)value);
+}
diff --git a/src/lib/syscall_task.C b/src/lib/syscall_task.C
index fcedcb64b..b133ef2e4 100644
--- a/src/lib/syscall_task.C
+++ b/src/lib/syscall_task.C
@@ -32,13 +32,9 @@ void task_end()
 
 tid_t task_gettid()
 {
-    // Even though we have a syscall for GETTID, we also have the task in 
-    // GRP13.
-
     register task_t* task;
     asm volatile("mr %0, 13" : "=r"(task));
     return task->tid;
-    //return (tid_t)_syscall0(TASK_GETTID);
 }
 
 cpuid_t task_getcpuid()