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authorLinus Torvalds <torvalds@linux-foundation.org>2017-02-22 10:33:53 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2017-02-22 10:33:53 -0800
commita4ee7bacd6c08479d56738456c07e4f32fc8e523 (patch)
tree0cb4621dcb8a9b0895eff0596df2cd026c239248
parent38705613b74ab090eee55c327cd0cb77fb10eb26 (diff)
parent8ba605b607b7278548c1092b2ac36381627f0839 (diff)
downloadlinux-a4ee7bacd6c08479d56738456c07e4f32fc8e523.tar.bz2
Merge tag 'arc-4.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc
Pull ARC updates from Vineet Gupta: - Intc imporvements [Yuriy] - VDK platform updates [Alexey] * tag 'arc-4.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc: ARC: [plat-*] ARC_HAS_COH_CACHES no longer relevant ARCv2: intc: Delete useless comments in Device Trees ARCv2: IDU-intc: Delete deprecated parameters in Device Trees ARCv2: IDU-intc: mask all common interrupts by default ARCv2: IDU-intc: Use build registers for getting numbers of interrupts ARCv2: intc: Set default priority for all core interrupts ARCv2: intc: Use runtime value of irq count for setting up intc ARCv2: intc: Rework the build time irq count information ARC: [intc-*]: confine NR_CPU_IRQS to intc code ARCv2: intc: Use ARC_REG_STATUS32 for addressing STATUS32 reg arc: vdk: Add support of UIO arc: vdk: Add support of MMC controller arc: vdk: Disable halt on reset
-rw-r--r--Documentation/devicetree/bindings/interrupt-controller/snps,archs-idu-intc.txt24
-rw-r--r--arch/arc/Kconfig17
-rw-r--r--arch/arc/boot/dts/axc003_idu.dtsi23
-rw-r--r--arch/arc/boot/dts/haps_hs_idu.dts11
-rw-r--r--arch/arc/boot/dts/nsim_hs_idu.dts15
-rw-r--r--arch/arc/boot/dts/nsimosci_hs_idu.dts21
-rw-r--r--arch/arc/boot/dts/vdk_axc003_idu.dtsi13
-rw-r--r--arch/arc/boot/dts/vdk_axs10x_mb.dtsi26
-rw-r--r--arch/arc/configs/vdk_hs38_smp_defconfig9
-rw-r--r--arch/arc/include/asm/arcregs.h3
-rw-r--r--arch/arc/include/asm/irq.h10
-rw-r--r--arch/arc/kernel/entry-arcv2.S7
-rw-r--r--arch/arc/kernel/intc-arcv2.c42
-rw-r--r--arch/arc/kernel/intc-compact.c1
-rw-r--r--arch/arc/kernel/mcip.c48
-rw-r--r--arch/arc/plat-eznps/Kconfig1
-rw-r--r--arch/arc/plat-sim/Kconfig1
-rw-r--r--include/soc/arc/mcip.h17
18 files changed, 138 insertions, 151 deletions
diff --git a/Documentation/devicetree/bindings/interrupt-controller/snps,archs-idu-intc.txt b/Documentation/devicetree/bindings/interrupt-controller/snps,archs-idu-intc.txt
index 944657684d73..8b46a34e05f1 100644
--- a/Documentation/devicetree/bindings/interrupt-controller/snps,archs-idu-intc.txt
+++ b/Documentation/devicetree/bindings/interrupt-controller/snps,archs-idu-intc.txt
@@ -8,15 +8,11 @@ Properties:
- compatible: "snps,archs-idu-intc"
- interrupt-controller: This is an interrupt controller.
- interrupt-parent: <reference to parent core intc>
-- #interrupt-cells: Must be <2>.
-- interrupts: <...> specifies the upstream core irqs
+- #interrupt-cells: Must be <1>.
- First cell specifies the "common" IRQ from peripheral to IDU
- Second cell specifies the irq distribution mode to cores
- 0=Round Robin; 1=cpu0, 2=cpu1, 4=cpu2, 8=cpu3
-
- The second cell in interrupts property is deprecated and may be ignored by
- the kernel.
+ Value of the cell specifies the "common" IRQ from peripheral to IDU. Number N
+ of the particular interrupt line of IDU corresponds to the line N+24 of the
+ core interrupt controller.
intc accessed via the special ARC AUX register interface, hence "reg" property
is not specified.
@@ -32,18 +28,10 @@ Example:
compatible = "snps,archs-idu-intc";
interrupt-controller;
interrupt-parent = <&core_intc>;
-
- /*
- * <hwirq distribution>
- * distribution: 0=RR; 1=cpu0, 2=cpu1, 4=cpu2, 8=cpu3
- */
- #interrupt-cells = <2>;
-
- /* upstream core irqs: downstream these are "COMMON" irq 0,1.. */
- interrupts = <24 25 26 27 28 29 30 31>;
+ #interrupt-cells = <1>;
};
some_device: serial@c0fc1000 {
interrupt-parent = <&idu_intc>;
- interrupts = <0 0>; /* upstream idu IRQ #24, Round Robin */
+ interrupts = <0>; /* upstream idu IRQ #24 */
};
diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index 283099c9560a..c9f30f4763ab 100644
--- a/arch/arc/Kconfig
+++ b/arch/arc/Kconfig
@@ -180,16 +180,12 @@ config CPU_BIG_ENDIAN
config SMP
bool "Symmetric Multi-Processing"
default n
- select ARC_HAS_COH_CACHES if ISA_ARCV2
select ARC_MCIP if ISA_ARCV2
help
This enables support for systems with more than one CPU.
if SMP
-config ARC_HAS_COH_CACHES
- def_bool n
-
config NR_CPUS
int "Maximum number of CPUs (2-4096)"
range 2 4096
@@ -219,8 +215,6 @@ config ARC_MCIP
menuconfig ARC_CACHE
bool "Enable Cache Support"
default y
- # if SMP, cache enabled ONLY if ARC implementation has cache coherency
- depends on !SMP || ARC_HAS_COH_CACHES
if ARC_CACHE
@@ -412,17 +406,6 @@ config ARC_HAS_DIV_REM
bool "Insn: div, divu, rem, remu"
default y
-config ARC_NUMBER_OF_INTERRUPTS
- int "Number of interrupts"
- range 8 240
- default 32
- help
- This defines the number of interrupts on the ARCv2HS core.
- It affects the size of vector table.
- The initial 8 IRQs are fixed (Timer, ICI etc) and although configurable
- in hardware, it keep things simple for Linux to assume they are always
- present.
-
endif # ISA_ARCV2
endmenu # "ARC CPU Configuration"
diff --git a/arch/arc/boot/dts/axc003_idu.dtsi b/arch/arc/boot/dts/axc003_idu.dtsi
index 3d6cfa32bf51..695f9fa1996b 100644
--- a/arch/arc/boot/dts/axc003_idu.dtsi
+++ b/arch/arc/boot/dts/axc003_idu.dtsi
@@ -40,18 +40,7 @@
compatible = "snps,archs-idu-intc";
interrupt-controller;
interrupt-parent = <&core_intc>;
-
- /*
- * <hwirq distribution>
- * distribution: 0=RR; 1=cpu0, 2=cpu1, 4=cpu2, 8=cpu3
- */
- #interrupt-cells = <2>;
-
- /*
- * upstream irqs to core intc - downstream these are
- * "COMMON" irq 0,1..
- */
- interrupts = <24 25>;
+ #interrupt-cells = <1>;
};
/*
@@ -73,12 +62,7 @@
interrupt-controller;
#interrupt-cells = <2>;
interrupt-parent = <&idu_intc>;
-
- /*
- * cmn irq 1 -> cpu irq 25
- * Distribute to cpu0 only
- */
- interrupts = <1 1>;
+ interrupts = <1>;
};
};
@@ -119,8 +103,7 @@
reg = < 0xe0012000 0x200 >;
interrupt-controller;
interrupt-parent = <&idu_intc>;
- interrupts = <0 1>; /* cmn irq 0 -> cpu irq 24
- distribute to cpu0 only */
+ interrupts = <0>;
};
memory {
diff --git a/arch/arc/boot/dts/haps_hs_idu.dts b/arch/arc/boot/dts/haps_hs_idu.dts
index 65204b4c0f13..215cddd0b63b 100644
--- a/arch/arc/boot/dts/haps_hs_idu.dts
+++ b/arch/arc/boot/dts/haps_hs_idu.dts
@@ -47,18 +47,13 @@
compatible = "snps,archs-intc";
interrupt-controller;
#interrupt-cells = <1>;
-/* interrupts = <16 17 18 19 20 21 22 23 24 25>; */
};
idu_intc: idu-interrupt-controller {
compatible = "snps,archs-idu-intc";
interrupt-controller;
interrupt-parent = <&core_intc>;
- /* <hwirq distribution>
- distribution: 0=RR; 1=cpu0, 2=cpu1, 4=cpu2, 8=cpu3 */
- #interrupt-cells = <2>;
- interrupts = <24 25 26 27 28 29 30 31>;
-
+ #interrupt-cells = <1>;
};
uart0: serial@f0000000 {
@@ -66,9 +61,7 @@
compatible = "ns16550a";
reg = <0xf0000000 0x2000>;
interrupt-parent = <&idu_intc>;
- /* interrupts = <0 1>; DEST=1*/
- /* interrupts = <0 2>; DEST=2*/
- interrupts = <0 0>; /* RR*/
+ interrupts = <0>;
clock-frequency = <50000000>;
baud = <115200>;
reg-shift = <2>;
diff --git a/arch/arc/boot/dts/nsim_hs_idu.dts b/arch/arc/boot/dts/nsim_hs_idu.dts
index 48434d7c4498..4f98ebf71fd8 100644
--- a/arch/arc/boot/dts/nsim_hs_idu.dts
+++ b/arch/arc/boot/dts/nsim_hs_idu.dts
@@ -46,25 +46,14 @@
compatible = "snps,archs-idu-intc";
interrupt-controller;
interrupt-parent = <&core_intc>;
-
- /*
- * <hwirq distribution>
- * distribution: 0=RR; 1=cpu0, 2=cpu1, 4=cpu2, 8=cpu3
- */
- #interrupt-cells = <2>;
-
- /*
- * upstream irqs to core intc - downstream these are
- * "COMMON" irq 0,1..
- */
- interrupts = <24 25 26 27 28 29 30 31>;
+ #interrupt-cells = <1>;
};
arcuart0: serial@c0fc1000 {
compatible = "snps,arc-uart";
reg = <0xc0fc1000 0x100>;
interrupt-parent = <&idu_intc>;
- interrupts = <0 0>;
+ interrupts = <0>;
clock-frequency = <80000000>;
current-speed = <115200>;
status = "okay";
diff --git a/arch/arc/boot/dts/nsimosci_hs_idu.dts b/arch/arc/boot/dts/nsimosci_hs_idu.dts
index cbf65b6cc7c6..5052917d4a99 100644
--- a/arch/arc/boot/dts/nsimosci_hs_idu.dts
+++ b/arch/arc/boot/dts/nsimosci_hs_idu.dts
@@ -43,33 +43,20 @@
compatible = "snps,archs-intc";
interrupt-controller;
#interrupt-cells = <1>;
-/* interrupts = <16 17 18 19 20 21 22 23 24 25>; */
};
idu_intc: idu-interrupt-controller {
compatible = "snps,archs-idu-intc";
interrupt-controller;
interrupt-parent = <&core_intc>;
-
- /*
- * <hwirq distribution>
- * distribution: 0=RR; 1=cpu0, 2=cpu1, 4=cpu2, 8=cpu3
- */
- #interrupt-cells = <2>;
-
- /*
- * upstream irqs to core intc - downstream these are
- * "COMMON" irq 0,1..
- */
- interrupts = <24 25 26 27 28 29 30 31>;
+ #interrupt-cells = <1>;
};
uart0: serial@f0000000 {
compatible = "ns8250";
reg = <0xf0000000 0x2000>;
interrupt-parent = <&idu_intc>;
- interrupts = <0 0>; /* cmn irq 0 -> cpu irq 24
- RR distribute to all cpus */
+ interrupts = <0>;
clock-frequency = <3686400>;
baud = <115200>;
reg-shift = <2>;
@@ -93,7 +80,7 @@
ps2: ps2@f9001000 {
compatible = "snps,arc_ps2";
reg = <0xf9000400 0x14>;
- interrupts = <3 0>;
+ interrupts = <3>;
interrupt-parent = <&idu_intc>;
interrupt-names = "arc_ps2_irq";
};
@@ -102,7 +89,7 @@
compatible = "ezchip,nps-mgt-enet";
reg = <0xf0003000 0x44>;
interrupt-parent = <&idu_intc>;
- interrupts = <1 2>;
+ interrupts = <1>;
};
arcpct0: pct {
diff --git a/arch/arc/boot/dts/vdk_axc003_idu.dtsi b/arch/arc/boot/dts/vdk_axc003_idu.dtsi
index 82214cd7ba0c..28956f9a9f3d 100644
--- a/arch/arc/boot/dts/vdk_axc003_idu.dtsi
+++ b/arch/arc/boot/dts/vdk_axc003_idu.dtsi
@@ -41,14 +41,7 @@
compatible = "snps,archs-idu-intc";
interrupt-controller;
interrupt-parent = <&core_intc>;
-
- /*
- * <hwirq distribution>
- * distribution: 0=RR; 1=cpu0, 2=cpu1, 4=cpu2, 8=cpu3
- */
- #interrupt-cells = <2>;
-
- interrupts = <24 25 26 27>;
+ #interrupt-cells = <1>;
};
debug_uart: dw-apb-uart@0x5000 {
@@ -56,7 +49,7 @@
reg = <0x5000 0x100>;
clock-frequency = <2403200>;
interrupt-parent = <&idu_intc>;
- interrupts = <2 0>;
+ interrupts = <2>;
baud = <115200>;
reg-shift = <2>;
reg-io-width = <4>;
@@ -70,7 +63,7 @@
reg = < 0xe0012000 0x200 >;
interrupt-controller;
interrupt-parent = <&idu_intc>;
- interrupts = < 0 0 >;
+ interrupts = <0>;
};
memory {
diff --git a/arch/arc/boot/dts/vdk_axs10x_mb.dtsi b/arch/arc/boot/dts/vdk_axs10x_mb.dtsi
index 99498a4b4216..f0df59b23e21 100644
--- a/arch/arc/boot/dts/vdk_axs10x_mb.dtsi
+++ b/arch/arc/boot/dts/vdk_axs10x_mb.dtsi
@@ -23,6 +23,12 @@
#clock-cells = <0>;
};
+ mmcclk: mmcclk {
+ compatible = "fixed-clock";
+ clock-frequency = <50000000>;
+ #clock-cells = <0>;
+ };
+
pguclk: pguclk {
#clock-cells = <0>;
compatible = "fixed-clock";
@@ -94,5 +100,25 @@
interrupts = <5>;
interrupt-names = "arc_ps2_irq";
};
+
+ mmc@0x15000 {
+ compatible = "snps,dw-mshc";
+ reg = <0x15000 0x400>;
+ num-slots = <1>;
+ fifo-depth = <1024>;
+ card-detect-delay = <200>;
+ clocks = <&apbclk>, <&mmcclk>;
+ clock-names = "biu", "ciu";
+ interrupts = <7>;
+ bus-width = <4>;
+ };
+
+ /* Embedded Vision subsystem UIO mappings; only relevant for EV VDK */
+ uio_ev: uio@0xD0000000 {
+ compatible = "generic-uio";
+ reg = <0xD0000000 0x2000 0xD1000000 0x2000 0x90000000 0x10000000 0xC0000000 0x10000000>;
+ reg-names = "ev_gsa", "ev_ctrl", "ev_shared_mem", "ev_code_mem";
+ interrupts = <23>;
+ };
};
};
diff --git a/arch/arc/configs/vdk_hs38_smp_defconfig b/arch/arc/configs/vdk_hs38_smp_defconfig
index 573028f19de7..5c0971787acf 100644
--- a/arch/arc/configs/vdk_hs38_smp_defconfig
+++ b/arch/arc/configs/vdk_hs38_smp_defconfig
@@ -16,6 +16,7 @@ CONFIG_AXS103=y
CONFIG_ISA_ARCV2=y
CONFIG_SMP=y
# CONFIG_ARC_TIMERS_64BIT is not set
+# CONFIG_ARC_SMP_HALT_ON_RESET is not set
CONFIG_ARC_UBOOT_SUPPORT=y
CONFIG_ARC_BUILTIN_DTB_NAME="vdk_hs38_smp"
CONFIG_PREEMPT=y
@@ -56,7 +57,6 @@ CONFIG_NATIONAL_PHY=y
CONFIG_MOUSE_PS2_TOUCHKIT=y
CONFIG_SERIO_ARC_PS2=y
# CONFIG_LEGACY_PTYS is not set
-# CONFIG_DEVKMEM is not set
CONFIG_SERIAL_8250=y
CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_8250_DW=y
@@ -78,9 +78,14 @@ CONFIG_USB_OHCI_HCD=y
CONFIG_USB_OHCI_HCD_PLATFORM=y
CONFIG_USB_STORAGE=y
CONFIG_USB_SERIAL=y
+CONFIG_MMC=y
+CONFIG_MMC_SDHCI=y
+CONFIG_MMC_SDHCI_PLTFM=y
+CONFIG_MMC_DW=y
+CONFIG_UIO=y
+CONFIG_UIO_PDRV_GENIRQ=y
# CONFIG_IOMMU_SUPPORT is not set
CONFIG_EXT3_FS=y
-CONFIG_EXT4_FS=y
CONFIG_MSDOS_FS=y
CONFIG_VFAT_FS=y
CONFIG_NTFS_FS=y
diff --git a/arch/arc/include/asm/arcregs.h b/arch/arc/include/asm/arcregs.h
index f659942744de..ba8e802dba80 100644
--- a/arch/arc/include/asm/arcregs.h
+++ b/arch/arc/include/asm/arcregs.h
@@ -38,6 +38,9 @@
#define ARC_REG_CLUSTER_BCR 0xcf
#define ARC_REG_AUX_ICCM 0x208 /* ICCM Base Addr (ARCv2) */
+/* Common for ARCompact and ARCv2 status register */
+#define ARC_REG_STATUS32 0x0A
+
/* status32 Bits Positions */
#define STATUS_AE_BIT 5 /* Exception active */
#define STATUS_DE_BIT 6 /* PC is in delay slot */
diff --git a/arch/arc/include/asm/irq.h b/arch/arc/include/asm/irq.h
index c0fa0d2de400..0618b1ce707c 100644
--- a/arch/arc/include/asm/irq.h
+++ b/arch/arc/include/asm/irq.h
@@ -9,13 +9,19 @@
#ifndef __ASM_ARC_IRQ_H
#define __ASM_ARC_IRQ_H
-#define NR_CPU_IRQS 32 /* number of interrupt lines of ARC770 CPU */
-#define NR_IRQS 128 /* allow some CPU external IRQ handling */
+/*
+ * ARCv2 can support 240 interrupts in the core interrupts controllers and
+ * 128 interrupts in IDU. Thus 512 virtual IRQs must be enough for most
+ * configurations of boards.
+ * This doesnt affect ARCompact, but we change it to same value
+ */
+#define NR_IRQS 512
/* Platform Independent IRQs */
#ifdef CONFIG_ISA_ARCV2
#define IPI_IRQ 19
#define SOFTIRQ_IRQ 21
+#define FIRST_EXT_IRQ 24
#endif
#include <linux/interrupt.h>
diff --git a/arch/arc/kernel/entry-arcv2.S b/arch/arc/kernel/entry-arcv2.S
index 0b6388a5f0b8..2585632eaa68 100644
--- a/arch/arc/kernel/entry-arcv2.S
+++ b/arch/arc/kernel/entry-arcv2.S
@@ -14,6 +14,11 @@
#include <asm/arcregs.h>
#include <asm/irqflags.h>
+; A maximum number of supported interrupts in the core interrupt controller.
+; This number is not equal to the maximum interrupt number (256) because
+; first 16 lines are reserved for exceptions and are not configurable.
+#define NR_CPU_IRQS 240
+
.cpu HS
#define VECTOR .word
@@ -52,7 +57,7 @@ VECTOR handle_interrupt ; unused
VECTOR handle_interrupt ; (23) unused
# End of fixed IRQs
-.rept CONFIG_ARC_NUMBER_OF_INTERRUPTS - 8
+.rept NR_CPU_IRQS - 8
VECTOR handle_interrupt
.endr
diff --git a/arch/arc/kernel/intc-arcv2.c b/arch/arc/kernel/intc-arcv2.c
index ecef0fb0b66c..f928795fd07a 100644
--- a/arch/arc/kernel/intc-arcv2.c
+++ b/arch/arc/kernel/intc-arcv2.c
@@ -14,6 +14,16 @@
#include <linux/irqchip.h>
#include <asm/irq.h>
+#define NR_EXCEPTIONS 16
+
+struct bcr_irq_arcv2 {
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ unsigned int pad:3, firq:1, prio:4, exts:8, irqs:8, ver:8;
+#else
+ unsigned int ver:8, irqs:8, exts:8, prio:4, firq:1, pad:3;
+#endif
+};
+
/*
* Early Hardware specific Interrupt setup
* -Called very early (start_kernel -> setup_arch -> setup_processor)
@@ -22,15 +32,8 @@
*/
void arc_init_IRQ(void)
{
- unsigned int tmp, irq_prio;
-
- struct irq_build {
-#ifdef CONFIG_CPU_BIG_ENDIAN
- unsigned int pad:3, firq:1, prio:4, exts:8, irqs:8, ver:8;
-#else
- unsigned int ver:8, irqs:8, exts:8, prio:4, firq:1, pad:3;
-#endif
- } irq_bcr;
+ unsigned int tmp, irq_prio, i;
+ struct bcr_irq_arcv2 irq_bcr;
struct aux_irq_ctrl {
#ifdef CONFIG_CPU_BIG_ENDIAN
@@ -68,8 +71,18 @@ void arc_init_IRQ(void)
irq_prio + 1, ARCV2_IRQ_DEF_PRIO,
irq_bcr.firq ? " FIRQ (not used)":"");
+ /*
+ * Set a default priority for all available interrupts to prevent
+ * switching of register banks if Fast IRQ and multiple register banks
+ * are supported by CPU.
+ */
+ for (i = NR_EXCEPTIONS; i < irq_bcr.irqs + NR_EXCEPTIONS; i++) {
+ write_aux_reg(AUX_IRQ_SELECT, i);
+ write_aux_reg(AUX_IRQ_PRIORITY, ARCV2_IRQ_DEF_PRIO);
+ }
+
/* setup status32, don't enable intr yet as kernel doesn't want */
- tmp = read_aux_reg(0xa);
+ tmp = read_aux_reg(ARC_REG_STATUS32);
tmp |= STATUS_AD_MASK | (ARCV2_IRQ_DEF_PRIO << 1);
tmp &= ~STATUS_IE_MASK;
asm volatile("kflag %0 \n"::"r"(tmp));
@@ -115,7 +128,7 @@ static int arcv2_irq_map(struct irq_domain *d, unsigned int irq,
* core intc IRQs [16, 23]:
* Statically assigned always private-per-core (Timers, WDT, IPI, PCT)
*/
- if (hw < 24) {
+ if (hw < FIRST_EXT_IRQ) {
/*
* A subsequent request_percpu_irq() fails if percpu_devid is
* not set. That in turns sets NOAUTOEN, meaning each core needs
@@ -140,11 +153,16 @@ static int __init
init_onchip_IRQ(struct device_node *intc, struct device_node *parent)
{
struct irq_domain *root_domain;
+ struct bcr_irq_arcv2 irq_bcr;
+ unsigned int nr_cpu_irqs;
+
+ READ_BCR(ARC_REG_IRQ_BCR, irq_bcr);
+ nr_cpu_irqs = irq_bcr.irqs + NR_EXCEPTIONS;
if (parent)
panic("DeviceTree incore intc not a root irq controller\n");
- root_domain = irq_domain_add_linear(intc, NR_CPU_IRQS, &arcv2_irq_ops, NULL);
+ root_domain = irq_domain_add_linear(intc, nr_cpu_irqs, &arcv2_irq_ops, NULL);
if (!root_domain)
panic("root irq domain not avail\n");
diff --git a/arch/arc/kernel/intc-compact.c b/arch/arc/kernel/intc-compact.c
index 8c1fd5c00782..7e608c6b0a01 100644
--- a/arch/arc/kernel/intc-compact.c
+++ b/arch/arc/kernel/intc-compact.c
@@ -14,6 +14,7 @@
#include <linux/irqchip.h>
#include <asm/irq.h>
+#define NR_CPU_IRQS 32 /* number of irq lines coming in */
#define TIMER0_IRQ 3 /* Fixed by ISA */
/*
diff --git a/arch/arc/kernel/mcip.c b/arch/arc/kernel/mcip.c
index 9f6b68fd4f3b..f61a52b01625 100644
--- a/arch/arc/kernel/mcip.c
+++ b/arch/arc/kernel/mcip.c
@@ -156,15 +156,20 @@ static void idu_set_mode(unsigned int cmn_irq, unsigned int lvl,
__mcip_cmd_data(CMD_IDU_SET_MODE, cmn_irq, data.word);
}
-static void idu_irq_mask(struct irq_data *data)
+static void idu_irq_mask_raw(irq_hw_number_t hwirq)
{
unsigned long flags;
raw_spin_lock_irqsave(&mcip_lock, flags);
- __mcip_cmd_data(CMD_IDU_SET_MASK, data->hwirq, 1);
+ __mcip_cmd_data(CMD_IDU_SET_MASK, hwirq, 1);
raw_spin_unlock_irqrestore(&mcip_lock, flags);
}
+static void idu_irq_mask(struct irq_data *data)
+{
+ idu_irq_mask_raw(data->hwirq);
+}
+
static void idu_irq_unmask(struct irq_data *data)
{
unsigned long flags;
@@ -230,14 +235,12 @@ static struct irq_chip idu_irq_chip = {
};
-static irq_hw_number_t idu_first_hwirq;
-
static void idu_cascade_isr(struct irq_desc *desc)
{
struct irq_domain *idu_domain = irq_desc_get_handler_data(desc);
struct irq_chip *core_chip = irq_desc_get_chip(desc);
irq_hw_number_t core_hwirq = irqd_to_hwirq(irq_desc_get_irq_data(desc));
- irq_hw_number_t idu_hwirq = core_hwirq - idu_first_hwirq;
+ irq_hw_number_t idu_hwirq = core_hwirq - FIRST_EXT_IRQ;
chained_irq_enter(core_chip, desc);
generic_handle_irq(irq_find_mapping(idu_domain, idu_hwirq));
@@ -252,23 +255,8 @@ static int idu_irq_map(struct irq_domain *d, unsigned int virq, irq_hw_number_t
return 0;
}
-static int idu_irq_xlate(struct irq_domain *d, struct device_node *n,
- const u32 *intspec, unsigned int intsize,
- irq_hw_number_t *out_hwirq, unsigned int *out_type)
-{
- /*
- * Ignore value of interrupt distribution mode for common interrupts in
- * IDU which resides in intspec[1] since setting an affinity using value
- * from Device Tree is deprecated in ARC.
- */
- *out_hwirq = intspec[0];
- *out_type = IRQ_TYPE_NONE;
-
- return 0;
-}
-
static const struct irq_domain_ops idu_irq_ops = {
- .xlate = idu_irq_xlate,
+ .xlate = irq_domain_xlate_onecell,
.map = idu_irq_map,
};
@@ -283,33 +271,37 @@ static int __init
idu_of_init(struct device_node *intc, struct device_node *parent)
{
struct irq_domain *domain;
- /* Read IDU BCR to confirm nr_irqs */
- int nr_irqs = of_irq_count(intc);
+ int nr_irqs;
int i, virq;
struct mcip_bcr mp;
+ struct mcip_idu_bcr idu_bcr;
READ_BCR(ARC_REG_MCIP_BCR, mp);
if (!mp.idu)
panic("IDU not detected, but DeviceTree using it");
- pr_info("MCIP: IDU referenced from Devicetree %d irqs\n", nr_irqs);
+ READ_BCR(ARC_REG_MCIP_IDU_BCR, idu_bcr);
+ nr_irqs = mcip_idu_bcr_to_nr_irqs(idu_bcr);
+
+ pr_info("MCIP: IDU supports %u common irqs\n", nr_irqs);
domain = irq_domain_add_linear(intc, nr_irqs, &idu_irq_ops, NULL);
/* Parent interrupts (core-intc) are already mapped */
for (i = 0; i < nr_irqs; i++) {
+ /* Mask all common interrupts by default */
+ idu_irq_mask_raw(i);
+
/*
* Return parent uplink IRQs (towards core intc) 24,25,.....
* this step has been done before already
* however we need it to get the parent virq and set IDU handler
* as first level isr
*/
- virq = irq_of_parse_and_map(intc, i);
- if (!i)
- idu_first_hwirq = irqd_to_hwirq(irq_get_irq_data(virq));
-
+ virq = irq_create_mapping(NULL, i + FIRST_EXT_IRQ);
+ BUG_ON(!virq);
irq_set_chained_handler_and_data(virq, idu_cascade_isr, domain);
}
diff --git a/arch/arc/plat-eznps/Kconfig b/arch/arc/plat-eznps/Kconfig
index 1d175cc6ad6d..1595a38e50cd 100644
--- a/arch/arc/plat-eznps/Kconfig
+++ b/arch/arc/plat-eznps/Kconfig
@@ -5,7 +5,6 @@
menuconfig ARC_PLAT_EZNPS
bool "\"EZchip\" ARC dev platform"
- select ARC_HAS_COH_CACHES if SMP
select CPU_BIG_ENDIAN
select CLKSRC_NPS
select EZNPS_GIC
diff --git a/arch/arc/plat-sim/Kconfig b/arch/arc/plat-sim/Kconfig
index 18e39fcc488a..ac6af96a82f3 100644
--- a/arch/arc/plat-sim/Kconfig
+++ b/arch/arc/plat-sim/Kconfig
@@ -8,7 +8,6 @@
menuconfig ARC_PLAT_SIM
bool "ARC nSIM based simulation virtual platforms"
- select ARC_HAS_COH_CACHES if SMP
help
Support for nSIM based ARC simulation platforms
This includes the standalone nSIM (uart only) vs. System C OSCI VP
diff --git a/include/soc/arc/mcip.h b/include/soc/arc/mcip.h
index 4b6b489a8d7c..c2d1b15da136 100644
--- a/include/soc/arc/mcip.h
+++ b/include/soc/arc/mcip.h
@@ -14,6 +14,7 @@
#include <soc/arc/aux.h>
#define ARC_REG_MCIP_BCR 0x0d0
+#define ARC_REG_MCIP_IDU_BCR 0x0D5
#define ARC_REG_MCIP_CMD 0x600
#define ARC_REG_MCIP_WDATA 0x601
#define ARC_REG_MCIP_READBACK 0x602
@@ -69,6 +70,22 @@ struct mcip_bcr {
#endif
};
+struct mcip_idu_bcr {
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ unsigned int pad:21, cirqnum:3, ver:8;
+#else
+ unsigned int ver:8, cirqnum:3, pad:21;
+#endif
+};
+
+
+/*
+ * Build register for IDU contains not an actual number of supported common
+ * interrupts but an exponent of 2 which must be multiplied by 4 to
+ * get a number of supported common interrupts.
+ */
+#define mcip_idu_bcr_to_nr_irqs(bcr) (4 * (1 << (bcr).cirqnum))
+
/*
* MCIP programming model
*