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ARCv2: IDU-intc: Use build registers for getting numbers of interrupts

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This enhancement is needed to allow masking all available common interrupts
in IDU interrupt controller in boot time since the kernel can
discover a number of them from the build register. Also now there
is no need to specify in device tree a list of used core interrupts
by IDU. E.g. before:

    idu_intc: idu-interrupt-controller {
        compatible = "snps,archs-idu-intc";
        interrupt-controller;
        interrupt-parent = <&core_intc>;
        #interrupt-cells = <2>;
        interrupts = <24 25 26 27 28 29 30 31>;
    };

and after:

    idu_intc: idu-interrupt-controller {
        compatible = "snps,archs-idu-intc";
        interrupt-controller;
        interrupt-parent = <&core_intc>;
        #interrupt-cells = <2>;
    };

Signed-off-by: Yuriy Kolerov <yuriy.kolerov@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
This commit is contained in:
Yuriy Kolerov
2017-01-31 14:45:23 +03:00
committed by Vineet Gupta
parent be568e78db
commit 6f0310a126
2 changed files with 26 additions and 10 deletions
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17
include/soc/arc/mcip.h
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@@ -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
*