cde2ba34a9
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>
54 lines
1.2 KiB
C
54 lines
1.2 KiB
C
/*
|
|
* QEMU PowerPC PowerNV Emulation of some CHIPTOD behaviour
|
|
*
|
|
* Copyright (c) 2022-2023, IBM Corporation.
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0-or-later
|
|
*/
|
|
|
|
#ifndef PPC_PNV_CHIPTOD_H
|
|
#define PPC_PNV_CHIPTOD_H
|
|
|
|
#include "qom/object.h"
|
|
|
|
#define TYPE_PNV_CHIPTOD "pnv-chiptod"
|
|
OBJECT_DECLARE_TYPE(PnvChipTOD, PnvChipTODClass, PNV_CHIPTOD)
|
|
#define TYPE_PNV9_CHIPTOD TYPE_PNV_CHIPTOD "-POWER9"
|
|
DECLARE_INSTANCE_CHECKER(PnvChipTOD, PNV9_CHIPTOD, TYPE_PNV9_CHIPTOD)
|
|
#define TYPE_PNV10_CHIPTOD TYPE_PNV_CHIPTOD "-POWER10"
|
|
DECLARE_INSTANCE_CHECKER(PnvChipTOD, PNV10_CHIPTOD, TYPE_PNV10_CHIPTOD)
|
|
|
|
enum tod_state {
|
|
tod_error = 0,
|
|
tod_not_set = 7,
|
|
tod_running = 2,
|
|
tod_stopped = 1,
|
|
};
|
|
|
|
typedef struct PnvCore PnvCore;
|
|
|
|
struct PnvChipTOD {
|
|
DeviceState xd;
|
|
|
|
PnvChip *chip;
|
|
MemoryRegion xscom_regs;
|
|
|
|
bool primary;
|
|
bool secondary;
|
|
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;
|
|
};
|
|
|
|
#endif /* PPC_PNV_CHIPTOD_H */
|