ppc/pnv: Move timebase state into PnvCore

The timebase state machine is per per-core state and can be driven
by any thread in the core. It is currently implemented as a hack
where the state is in a CPU structure and only thread 0's state is
accessed by the chiptod, which limits programming the timebase
side of the state machine to thread 0 of a core.

Move the state out into PnvCore and share it among all threads.

Reviewed-by: Harsh Prateek Bora <harshpb@linux.ibm.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/include/hw/ppc/pnv_core.h b/include/hw/ppc/pnv_core.h
index 29cab9d..ffec851 100644
--- a/include/hw/ppc/pnv_core.h
+++ b/include/hw/ppc/pnv_core.h
@@ -25,6 +25,20 @@
 #include "hw/ppc/pnv.h"
 #include "qom/object.h"
 
+/* Per-core ChipTOD / TimeBase state */
+typedef struct PnvCoreTODState {
+    int tb_ready_for_tod; /* core TB ready to receive TOD from chiptod */
+    int tod_sent_to_tb;   /* chiptod sent TOD to the core TB */
+
+    /*
+     * "Timers" for async TBST events are simulated by mfTFAC because TFAC
+     * is polled for such events. These are just used to ensure firmware
+     * performs the polling at least a few times.
+     */
+    int tb_state_timer;
+    int tb_sync_pulse_timer;
+} PnvCoreTODState;
+
 #define TYPE_PNV_CORE "powernv-cpu-core"
 OBJECT_DECLARE_TYPE(PnvCore, PnvCoreClass,
                     PNV_CORE)
@@ -38,6 +52,9 @@ struct PnvCore {
     uint32_t pir;
     uint32_t hwid;
     uint64_t hrmor;
+
+    PnvCoreTODState tod_state;
+
     PnvChip *chip;
 
     MemoryRegion xscom_regs;