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gicv3: add support for mbi-alias property 

The mbi-alias property, if present, contains the base address of a GICD
alias frame that contains only SET/CLRSPI registers. Use this instead of
the GICD register frame if present.
This commit is contained in:
jmcneill 2021-11-17 21:46:12 +00:00
parent 54291df9d9
commit 6d434d7d07
1 changed files with 11 additions and 7 deletions
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18
sys/arch/arm/fdt/gicv3_fdt.c
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@ -1,4 +1,4 @@
/* $NetBSD: gicv3_fdt.c,v 1.15 2021/01/27 03:10:19 thorpej Exp $ */
/* $NetBSD: gicv3_fdt.c,v 1.16 2021/11/17 21:46:12 jmcneill Exp $ */
/*-
* Copyright (c) 2015-2018 Jared McNeill <jmcneill@invisible.ca>
@ -31,7 +31,7 @@
#define _INTR_PRIVATE
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: gicv3_fdt.c,v 1.15 2021/01/27 03:10:19 thorpej Exp $");
__KERNEL_RCSID(0, "$NetBSD: gicv3_fdt.c,v 1.16 2021/11/17 21:46:12 jmcneill Exp $");
#include <sys/param.h>
#include <sys/bus.h>
@ -273,14 +273,18 @@ gicv3_fdt_attach_mbi(struct gicv3_fdt_softc *sc)
bus_addr_t addr;
int len, frame_count;
if (of_hasprop(sc->sc_phandle, "mbi-alias")) {
aprint_error_dev(sc->sc_gic.sc_dev, "'mbi-alias' property not supported\n");
/*
* If a GICD alias frame containing only the SET/CLRSPI registers
* exists, the base address will be reported by the 'mbi-alias'
* property. If this doesn't exist, use the GICD register frame
* instead.
*/
if (of_getprop_uint64(sc->sc_phandle, "mbi-alias", &addr) != 0 &&
fdtbus_get_reg(sc->sc_phandle, 0, &addr, NULL) != 0) {
aprint_error_dev(sc->sc_gic.sc_dev, "couldn't find MBI register frame\n");
return;
}
if (fdtbus_get_reg(sc->sc_phandle, 0, &addr, NULL) != 0)
return;
ranges = fdtbus_get_prop(sc->sc_phandle, "mbi-ranges", &len);
if (ranges == NULL) {
aprint_error_dev(sc->sc_gic.sc_dev, "missing 'mbi-ranges' property\n");