diff options
| author | Nicholas Piggin <npiggin@gmail.com> | 2023-11-23 18:02:36 +1000 |
|---|---|---|
| committer | Nicholas Piggin <npiggin@gmail.com> | 2024-02-23 23:24:43 +1000 |
| commit | cde2ba34a951997f01c184acf6e3a29eb6a81e79 (patch) | |
| tree | 340ee414749fc39e8cc3eca9acb0e2d35414d3db /include/hw/ppc/pnv_chiptod.h | |
| parent | de3ba0cc38ffb96265f29c2399df0a5c0f301f40 (diff) | |
ppc/pnv: Implement the ChipTOD to Core transfer
One of the functions of the ChipTOD is to transfer TOD to the Core
(aka PC - Pervasive Core) timebase facility.
The ChipTOD can be programmed with a target address to send the TOD
value to. The hardware implementation seems to perform this by
sending the TOD value to a SCOM address.
This implementation grabs the core directly and manipulates the
timebase facility state in the core. This is a hack, but it works
enough for now. A better implementation would implement the transfer
to the PnvCore xscom register and drive the timebase state machine
from there.
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Diffstat (limited to 'include/hw/ppc/pnv_chiptod.h')
| -rw-r--r-- | include/hw/ppc/pnv_chiptod.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/hw/ppc/pnv_chiptod.h b/include/hw/ppc/pnv_chiptod.h index ca770525d9..fde569bcbf 100644 --- a/include/hw/ppc/pnv_chiptod.h +++ b/include/hw/ppc/pnv_chiptod.h @@ -25,6 +25,8 @@ enum tod_state { tod_stopped = 1, }; +typedef struct PnvCore PnvCore; + struct PnvChipTOD { DeviceState xd; @@ -36,12 +38,14 @@ struct PnvChipTOD { enum tod_state tod_state; uint64_t tod_error; uint64_t pss_mss_ctrl_reg; + PnvCore *slave_pc_target; }; struct PnvChipTODClass { DeviceClass parent_class; void (*broadcast_ttype)(PnvChipTOD *sender, uint32_t trigger); + PnvCore *(*tx_ttype_target)(PnvChipTOD *chiptod, uint64_t val); int xscom_size; }; |