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Rework the PSCI cpu on code to allow it to work before device drivers have

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started. This allows this functions to be used with the regular ARM SMP
initialisation sequence.
This commit is contained in:
Andrew Turner 2015-05-24 11:08:06 +00:00
parent 6177d84d6e
commit 7ad1ac7d6a
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=283363
1 changed files with 39 additions and 18 deletions
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57
sys/dev/psci/psci.c
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@ -102,6 +102,24 @@ EARLY_DRIVER_MODULE(psci, simplebus, psci_driver, psci_devclass, 0, 0,
EARLY_DRIVER_MODULE(psci, ofwbus, psci_driver, psci_devclass, 0, 0,
BUS_PASS_CPU + BUS_PASS_ORDER_FIRST);
static psci_callfn_t
psci_get_callfn(phandle_t node)
{
char method[16];
if ((OF_getprop(node, "method", method, sizeof(method))) > 0) {
if (strcmp(method, "hvc") == 0)
return (psci_hvc_despatch);
else if (strcmp(method, "smc") == 0)
return (psci_smc_despatch);
else
printf("psci: PSCI conduit \"%s\" invalid\n", method);
} else
printf("psci: PSCI conduit not supplied in the device tree\n");
return (NULL);
}
static int
psci_probe(device_t dev)
{
@ -126,7 +144,6 @@ psci_attach(device_t dev)
const struct ofw_compat_data *ocd;
psci_initfn_t psci_init;
phandle_t node;
char method[16];
if (psci_softc != NULL)
return (ENXIO);
@ -136,22 +153,9 @@ psci_attach(device_t dev)
KASSERT(psci_init != NULL, ("PSCI init function cannot be NULL"));
node = ofw_bus_get_node(dev);
if ((OF_getprop(node, "method", method, sizeof(method))) > 0) {
if (strcmp(method, "hvc") == 0)
sc->psci_call = psci_hvc_despatch;
else if (strcmp(method, "smc") == 0)
sc->psci_call = psci_smc_despatch;
else {
device_printf(dev,
"psci_attach: PSCI conduit \"%s\" invalid\n",
method);
return (ENXIO);
}
} else {
device_printf(dev,
"psci_attach: PSCI conduit not supplied in the DT\n");
sc->psci_call = psci_get_callfn(node);
if (sc->psci_call == NULL)
return (ENXIO);
}
if (psci_init(dev))
return (ENXIO);
@ -177,10 +181,27 @@ psci_get_version(struct psci_softc *sc)
int
psci_cpu_on(unsigned long cpu, unsigned long entry, unsigned long context_id)
{
psci_callfn_t callfn;
phandle_t node;
uint32_t fnid;
if (psci_softc == NULL) {
node = ofw_bus_find_compatible(OF_peer(0), "arm,psci-0.2");
if (node == 0)
/* TODO: Handle psci 0.1 */
return (PSCI_RETVAL_INTERNAL_FAILURE);
fnid = PSCI_FNID_CPU_ON;
callfn = psci_get_callfn(node);
if (callfn == NULL)
return (PSCI_RETVAL_INTERNAL_FAILURE);
} else {
callfn = psci_softc->psci_call;
fnid = psci_softc->psci_fnids[PSCI_FN_CPU_ON];
}
/* PSCI v0.1 and v0.2 both support cpu_on. */
return(psci_softc->psci_call(psci_softc->psci_fnids[PSCI_FN_CPU_ON], cpu,
entry, context_id));
return (callfn(fnid, cpu, entry, context_id));
}
static void