[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v4 08/10] arm/gic-v3: Refactor gicv3_init into generic and dt specific parts
From: Shannon Zhao <shannon.zhao@xxxxxxxxxx> Refactor gic-v3 related functions into dt and generic parts. This will be helpful when adding acpi support for gic-v3. Signed-off-by: Shannon Zhao <shannon.zhao@xxxxxxxxxx> --- v4: Use INVALID_PADDR and move ioremap to common init function --- xen/arch/arm/gic-v3.c | 114 +++++++++++++++++++++++++++----------------------- 1 file changed, 61 insertions(+), 53 deletions(-) diff --git a/xen/arch/arm/gic-v3.c b/xen/arch/arm/gic-v3.c index a245b56..65a4de6 100644 --- a/xen/arch/arm/gic-v3.c +++ b/xen/arch/arm/gic-v3.c @@ -1138,41 +1138,14 @@ static int __init cmp_rdist(const void *a, const void *b) return ( l->base < r->base) ? -1 : 0; } +static paddr_t __initdata dbase = INVALID_PADDR, vbase = INVALID_PADDR; +static paddr_t __initdata cbase = INVALID_PADDR, csize = INVALID_PADDR; + /* If the GICv3 supports GICv2, initialize it */ -static void __init gicv3_init_v2(const struct dt_device_node *node, - paddr_t dbase) +static void __init gicv3_init_v2(void) { - int res; - paddr_t cbase, csize; - paddr_t vbase, vsize; - - /* - * For GICv3 supporting GICv2, GICC and GICV base address will be - * provided. - */ - res = dt_device_get_address(node, 1 + gicv3.rdist_count, - &cbase, &csize); - if ( res ) - return; - - res = dt_device_get_address(node, 1 + gicv3.rdist_count + 2, - &vbase, &vsize); - if ( res ) - return; - - /* - * We emulate a vGICv2 using a GIC CPU interface of GUEST_GICC_SIZE. - * So only support GICv2 on GICv3 when the virtual CPU interface is - * at least GUEST_GICC_SIZE. - */ - if ( vsize < GUEST_GICC_SIZE ) - { - printk(XENLOG_WARNING - "GICv3: WARNING: Not enabling support for GICv2 compat mode.\n" - "Size of GICV (%#"PRIpaddr") must at least be %#llx.\n", - vsize, GUEST_GICC_SIZE); + if ( cbase == INVALID_PADDR || vbase == INVALID_PADDR ) return; - } printk("GICv3 compatible with GICv2 cbase %#"PRIpaddr" vbase %#"PRIpaddr"\n", cbase, vbase); @@ -1180,20 +1153,12 @@ static void __init gicv3_init_v2(const struct dt_device_node *node, vgic_v2_setup_hw(dbase, cbase, csize, vbase, 0); } -/* Set up the GIC */ -static int __init gicv3_init(void) +static void __init gicv3_dt_init(void) { struct rdist_region *rdist_regs; int res, i; - uint32_t reg; const struct dt_device_node *node = gicv3_info.node; - paddr_t dbase; - - if ( !cpu_has_gicv3 ) - { - dprintk(XENLOG_ERR, "GICv3: driver requires system register support\n"); - return -ENODEV; - } + paddr_t vsize; res = dt_device_get_address(node, 0, &dbase, NULL); if ( res ) @@ -1203,14 +1168,6 @@ static int __init gicv3_init(void) panic("GICv3: Found unaligned distributor address %"PRIpaddr"", dbase); - gicv3.map_dbase = ioremap_nocache(dbase, SZ_64K); - if ( !gicv3.map_dbase ) - panic("GICv3: Failed to ioremap for GIC distributor\n"); - - reg = readl_relaxed(GICD + GICD_PIDR2) & GIC_PIDR2_ARCH_MASK; - if ( reg != GIC_PIDR2_ARCH_GICv3 && reg != GIC_PIDR2_ARCH_GICv4 ) - panic("GICv3: no distributor detected\n"); - if ( !dt_property_read_u32(node, "#redistributor-regions", &gicv3.rdist_count) ) gicv3.rdist_count = 1; @@ -1248,6 +1205,57 @@ static int __init gicv3_init(void) panic("GICv3: Cannot find the maintenance IRQ"); gicv3_info.maintenance_irq = res; + /* + * For GICv3 supporting GICv2, GICC and GICV base address will be + * provided. + */ + res = dt_device_get_address(node, 1 + gicv3.rdist_count, + &cbase, &csize); + if ( res ) + return; + + res = dt_device_get_address(node, 1 + gicv3.rdist_count + 2, + &vbase, &vsize); + if ( res ) + return; + + /* + * We emulate a vGICv2 using a GIC CPU interface of GUEST_GICC_SIZE. + * So only support GICv2 on GICv3 when the virtual CPU interface is + * at least GUEST_GICC_SIZE. + */ + if ( vsize < GUEST_GICC_SIZE ) + { + printk(XENLOG_WARNING + "GICv3: WARNING: Not enabling support for GICv2 compat mode.\n" + "Size of GICV (%#"PRIpaddr") must at least be %#llx.\n", + vsize, GUEST_GICC_SIZE); + return; + } +} + +/* Set up the GIC */ +static int __init gicv3_init(void) +{ + int res, i; + uint32_t reg; + + if ( !cpu_has_gicv3 ) + { + dprintk(XENLOG_ERR, "GICv3: driver requires system register support\n"); + return -ENODEV; + } + + gicv3_dt_init(); + + gicv3.map_dbase = ioremap_nocache(dbase, SZ_64K); + if ( !gicv3.map_dbase ) + panic("GICv3: Failed to ioremap for GIC distributor\n"); + + reg = readl_relaxed(GICD + GICD_PIDR2) & GIC_PIDR2_ARCH_MASK; + if ( reg != GIC_PIDR2_ARCH_GICv3 && reg != GIC_PIDR2_ARCH_GICv4 ) + panic("GICv3: no distributor detected\n"); + for ( i = 0; i < gicv3.rdist_count; i++ ) { /* map dbase & rdist regions */ @@ -1277,7 +1285,7 @@ static int __init gicv3_init(void) vgic_v3_setup_hw(dbase, gicv3.rdist_count, gicv3.rdist_regions, gicv3.rdist_stride); - gicv3_init_v2(node, dbase); + gicv3_init_v2(); spin_lock_init(&gicv3.lock); @@ -1317,7 +1325,7 @@ static const struct gic_hw_operations gicv3_ops = { .make_hwdom_dt_node = gicv3_make_hwdom_dt_node, }; -static int __init gicv3_preinit(struct dt_device_node *node, const void *data) +static int __init gicv3_dt_preinit(struct dt_device_node *node, const void *data) { gicv3_info.hw_version = GIC_V3; gicv3_info.node = node; @@ -1335,7 +1343,7 @@ static const struct dt_device_match gicv3_dt_match[] __initconst = DT_DEVICE_START(gicv3, "GICv3", DEVICE_GIC) .dt_match = gicv3_dt_match, - .init = gicv3_preinit, + .init = gicv3_dt_preinit, DT_DEVICE_END /* -- 2.0.4 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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