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ppc/pnv: scan ISA bus to populate device tree

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This is an empty shell that we will use to include nodes in the device
tree for ISA devices. We expect RTC, UART and IPMI BT devices.

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 2017-04-11 17:30:01 +02:00 committed by David Gibson
parent 5a7e14a274
commit e7a3fee340
1 changed files with 28 additions and 0 deletions
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28
hw/ppc/pnv.c
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@ -303,6 +303,29 @@ static void powernv_populate_chip(PnvChip *chip, void *fdt)
g_free(typename);
}
typedef struct ForeachPopulateArgs {
void *fdt;
int offset;
} ForeachPopulateArgs;
static int powernv_populate_isa_device(DeviceState *dev, void *opaque)
{
return 0;
}
static void powernv_populate_isa(ISABus *bus, void *fdt, int lpc_offset)
{
ForeachPopulateArgs args = {
.fdt = fdt,
.offset = lpc_offset,
};
/* ISA devices are not necessarily parented to the ISA bus so we
* can not use object_child_foreach() */
qbus_walk_children(BUS(bus), powernv_populate_isa_device,
NULL, NULL, NULL, &args);
}
static void *powernv_create_fdt(MachineState *machine)
{
const char plat_compat[] = "qemu,powernv\0ibm,powernv";
@ -311,6 +334,7 @@ static void *powernv_create_fdt(MachineState *machine)
char *buf;
int off;
int i;
int lpc_offset;
fdt = g_malloc0(FDT_MAX_SIZE);
_FDT((fdt_create_empty_tree(fdt, FDT_MAX_SIZE)));
@ -350,6 +374,10 @@ static void *powernv_create_fdt(MachineState *machine)
for (i = 0; i < pnv->num_chips; i++) {
powernv_populate_chip(pnv->chips[i], fdt);
}
/* Populate ISA devices on chip 0 */
lpc_offset = pnv_chip_lpc_offset(pnv->chips[0], fdt);
powernv_populate_isa(pnv->isa_bus, fdt, lpc_offset);
return fdt;
}