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ppc/pnv: add a helper to calculate MMIO addresses registers

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Some controllers (ICP, PSI) have a base register address which is
calculated using the chip id.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Cédric Le Goater 2017-04-03 09:46:04 +02:00 committed by David Gibson
parent 960fbd29e5
commit 5509db4aec
1 changed files with 11 additions and 1 deletions
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12
include/hw/ppc/pnv.h
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@ -91,14 +91,24 @@ typedef struct PnvChipClass {
OBJECT_CHECK(PnvChip, (obj), TYPE_PNV_CHIP_POWER9)
/*
* This generates a HW chip id depending on an index:
* This generates a HW chip id depending on an index, as found on a
* two socket system with dual chip modules :
*
* 0x0, 0x1, 0x10, 0x11
*
* 4 chips should be the maximum
*
* TODO: use a machine property to define the chip ids
*/
#define PNV_CHIP_HWID(i) ((((i) & 0x3e) << 3) | ((i) & 0x1))
/*
* Converts back a HW chip id to an index. This is useful to calculate
* the MMIO addresses of some controllers which depend on the chip id.
*/
#define PNV_CHIP_INDEX(chip) \
(((chip)->chip_id >> 2) * 2 + ((chip)->chip_id & 0x3))
#define TYPE_POWERNV_MACHINE MACHINE_TYPE_NAME("powernv")
#define POWERNV_MACHINE(obj) \
OBJECT_CHECK(PnvMachineState, (obj), TYPE_POWERNV_MACHINE)