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gicv3_its: refactor LPI init into a new function

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Move the per-cpu LPI intialization to a separate function. This is
in preparation for a commit that does LPI init only once for a CPU,
even when there are multiple ITS blocks associated with the CPU.

No functional changes in this commit.

Reviewed by:	andrew
Differential Revision:	https://reviews.freebsd.org/D19843
This commit is contained in:
jchandra 2019-05-30 01:24:47 +00:00
parent 281e5a5253
commit 21280ab5e7
1 changed files with 22 additions and 11 deletions
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33
sys/arm64/arm64/gicv3_its.c
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@ -574,25 +574,16 @@ gicv3_its_pendtables_init(struct gicv3_its_softc *sc)
}
}
static int
its_init_cpu(device_t dev, struct gicv3_its_softc *sc)
static void
its_init_cpu_lpi(device_t dev, struct gicv3_its_softc *sc)
{
struct redist_pcpu *rpcpu;
device_t gicv3;
vm_paddr_t target;
uint64_t xbaser, tmp;
uint32_t ctlr;
u_int cpuid;
gicv3 = device_get_parent(dev);
cpuid = PCPU_GET(cpuid);
if (!CPU_ISSET(cpuid, &sc->sc_cpus))
return (0);
/* Check if the ITS is enabled on this CPU */
if ((gic_r_read_4(gicv3, GICR_TYPER) & GICR_TYPER_PLPIS) == 0) {
return (ENXIO);
}
/* Disable LPIs */
ctlr = gic_r_read_4(gicv3, GICR_CTLR);
@ -662,6 +653,26 @@ its_init_cpu(device_t dev, struct gicv3_its_softc *sc)
/* Make sure the GIC has seen everything */
dsb(sy);
}
static int
its_init_cpu(device_t dev, struct gicv3_its_softc *sc)
{
device_t gicv3;
vm_paddr_t target;
u_int cpuid;
struct redist_pcpu *rpcpu;
gicv3 = device_get_parent(dev);
cpuid = PCPU_GET(cpuid);
if (!CPU_ISSET(cpuid, &sc->sc_cpus))
return (0);
/* Check if the ITS is enabled on this CPU */
if ((gic_r_read_4(gicv3, GICR_TYPER) & GICR_TYPER_PLPIS) == 0)
return (ENXIO);
its_init_cpu_lpi(dev, sc);
if ((gic_its_read_8(sc, GITS_TYPER) & GITS_TYPER_PTA) != 0) {
/* This ITS wants the redistributor physical address */