39 lines
1.1 KiB
Plaintext
39 lines
1.1 KiB
Plaintext
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Samsung Exynos SYSRAM for SMP bringup:
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------------------------------------
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Samsung SMP-capable Exynos SoCs use part of the SYSRAM for the bringup
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of the secondary cores. Once the core gets powered up it executes the
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code that is residing at some specific location of the SYSRAM.
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Therefore reserved section sub-nodes have to be added to the mmio-sram
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declaration. These nodes are of two types depending upon secure or
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non-secure execution environment.
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Required sub-node properties:
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- compatible : depending upon boot mode, should be
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"samsung,exynos4210-sysram" : for Secure SYSRAM
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"samsung,exynos4210-sysram-ns" : for Non-secure SYSRAM
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The rest of the properties should follow the generic mmio-sram discription
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found in Documentation/devicetree/bindings/sram/sram.txt
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Example:
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sysram@2020000 {
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compatible = "mmio-sram";
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reg = <0x02020000 0x54000>;
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#address-cells = <1>;
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#size-cells = <1>;
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ranges = <0 0x02020000 0x54000>;
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smp-sysram@0 {
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compatible = "samsung,exynos4210-sysram";
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reg = <0x0 0x1000>;
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};
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smp-sysram@53000 {
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compatible = "samsung,exynos4210-sysram-ns";
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reg = <0x53000 0x1000>;
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};
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};
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