Implement missing parts of the logic for the POWER PURR

The PURR (Processor Utilization Resource Register) is a register found
on recent POWER CPUs.  The guts of implementing it at least enough to
get by are already present in qemu, however some of the helper
functions needed to actually wire it up are missing.

This patch adds the necessary glue, so that the PURR can be wired up
when we implement newer POWER CPU targets which include it.

Signed-off-by: David Gibson <dwg@au1.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>

diff --git a/target-ppc/helper.h b/target-ppc/helper.h
index 1a69cf876c952613a2b5f5452d54d4b7ee24fc2b..2b4744d33178ba1bf43009dafda6fe489e7b8028 100644 (file)
--- a/target-ppc/helper.h
+++ b/target-ppc/helper.h
@@ -376,6 +376,7 @@ DEF_HELPER_0(load_601_rtcu, tl)
 #if !defined(CONFIG_USER_ONLY)
 #if defined(TARGET_PPC64)
 DEF_HELPER_1(store_asr, void, tl)
+DEF_HELPER_0(load_purr, tl)
 #endif
 DEF_HELPER_1(store_sdr1, void, tl)
 DEF_HELPER_1(store_tbl, void, tl)

diff --git a/target-ppc/op_helper.c b/target-ppc/op_helper.c
index bdb1f1732a530c7b9b22c6feb290b8112e2c588f..aa2e8ba415857edf973bfe22b27ed51b75a31068 100644 (file)
--- a/target-ppc/op_helper.c
+++ b/target-ppc/op_helper.c
@@ -86,6 +86,13 @@ target_ulong helper_load_atbu (void)
     return cpu_ppc_load_atbu(env);
 }
 
+#if defined(TARGET_PPC64) && !defined(CONFIG_USER_ONLY)
+target_ulong helper_load_purr (void)
+{
+    return (target_ulong)cpu_ppc_load_purr(env);
+}
+#endif
+
 target_ulong helper_load_601_rtcl (void)
 {
     return cpu_ppc601_load_rtcl(env);

diff --git a/target-ppc/translate_init.c b/target-ppc/translate_init.c
index 7c08b1cb0904c2708fa5476ce8394887d23d29fb..bca85d5073a53ef64ad1d46644eb05b7356cd609 100644 (file)
--- a/target-ppc/translate_init.c
+++ b/target-ppc/translate_init.c
@@ -251,6 +251,14 @@ static void spr_write_atbu (void *opaque, int sprn, int gprn)
 {
     gen_helper_store_atbu(cpu_gpr[gprn]);
 }
+
+#if defined(TARGET_PPC64)
+__attribute__ (( unused ))
+static void spr_read_purr (void *opaque, int gprn, int sprn)
+{
+    gen_helper_load_purr(cpu_gpr[gprn]);
+}
+#endif
 #endif
 
 #if !defined(CONFIG_USER_ONLY)