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ppc/pnv: Introduce PnvChipClass::xscom_pcba() method

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The XSCOM bus is implemented with a QOM interface, which is mostly
generic from a CPU type standpoint, except for the computation of
addresses on the Pervasive Connect Bus (PCB) network. This is handled
by the pnv_xscom_pcba() function with a switch statement based on
the chip_type class level attribute of the CPU chip.

This can be achieved using QOM. Also the address argument is masked with
PNV_XSCOM_SIZE - 1, which is for POWER8 only. Addresses may have different
sizes with other CPU types. Have each CPU chip type handle the appropriate
computation with a QOM xscom_pcba() method.

Signed-off-by: Greg Kurz <groug@kaod.org>
Message-Id: <157623843543.360005.13996472463887521794.stgit@bahia.lan>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Greg Kurz 2019-12-13 13:00:35 +01:00 • committed by David Gibson
parent 3caf7bd0a2
commit 70c059e926
3 changed files with 25 additions and 13 deletions
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1
include/hw/ppc/pnv.h
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@ -138,6 +138,7 @@ typedef struct PnvChipClass {
void (*dt_populate)(PnvChip *chip, void *fdt);
void (*pic_print_info)(PnvChip *chip, Monitor *mon);
uint64_t (*xscom_core_base)(PnvChip *chip, uint32_t core_id);
uint32_t (*xscom_pcba)(PnvChip *chip, uint64_t addr);
} PnvChipClass;
#define PNV_CHIP_TYPE_SUFFIX "-" TYPE_PNV_CHIP