1 files changed, 41 insertions, 0 deletions
diff --git a/hw/spapr_hcall.c b/hw/spapr_hcall.c
new file mode 100644
index 0000000000..e3919d01c2
--- /dev/null
+++ b/hw/spapr_hcall.c
@@ -0,0 +1,41 @@
+#include "sysemu.h"
+#include "cpu.h"
+#include "qemu-char.h"
+#include "hw/spapr.h"
+
+spapr_hcall_fn hypercall_table[(MAX_HCALL_OPCODE / 4) + 1];
+
+void spapr_register_hypercall(target_ulong opcode, spapr_hcall_fn fn)
+{
+    spapr_hcall_fn old_fn;
+
+    assert(opcode <= MAX_HCALL_OPCODE);
+    assert((opcode & 0x3) == 0);
+
+    old_fn = hypercall_table[opcode / 4];
+
+    assert(!old_fn || (fn == old_fn));
+
+    hypercall_table[opcode / 4] = fn;
+}
+
+target_ulong spapr_hypercall(CPUState *env, target_ulong opcode,
+                             target_ulong *args)
+{
+    if (msr_pr) {
+        hcall_dprintf("Hypercall made with MSR[PR]=1\n");
+        return H_PRIVILEGE;
+    }
+
+    if ((opcode <= MAX_HCALL_OPCODE)
+        && ((opcode & 0x3) == 0)) {
+        spapr_hcall_fn fn = hypercall_table[opcode / 4];
+
+        if (fn) {
+            return fn(env, spapr, opcode, args);
+        }
+    }
+
+    hcall_dprintf("Unimplemented hcall 0x" TARGET_FMT_lx "\n", opcode);
+    return H_FUNCTION;
+}