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Diffstat (limited to 'Documentation/arm/samsung/bootloader-interface.rst')
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diff --git a/Documentation/arm/samsung/bootloader-interface.rst b/Documentation/arm/samsung/bootloader-interface.rst deleted file mode 100644 index a56f325dae78..000000000000 --- a/Documentation/arm/samsung/bootloader-interface.rst +++ /dev/null @@ -1,81 +0,0 @@ -========================================================== -Interface between kernel and boot loaders on Exynos boards -========================================================== - -Author: Krzysztof Kozlowski - -Date : 6 June 2015 - -The document tries to describe currently used interface between Linux kernel -and boot loaders on Samsung Exynos based boards. This is not a definition -of interface but rather a description of existing state, a reference -for information purpose only. - -In the document "boot loader" means any of following: U-boot, proprietary -SBOOT or any other firmware for ARMv7 and ARMv8 initializing the board before -executing kernel. - - -1. Non-Secure mode - -Address: sysram_ns_base_addr - -============= ============================================ ================== -Offset Value Purpose -============= ============================================ ================== -0x08 exynos_cpu_resume_ns, mcpm_entry_point System suspend -0x0c 0x00000bad (Magic cookie) System suspend -0x1c exynos4_secondary_startup Secondary CPU boot -0x1c + 4*cpu exynos4_secondary_startup (Exynos4412) Secondary CPU boot -0x20 0xfcba0d10 (Magic cookie) AFTR -0x24 exynos_cpu_resume_ns AFTR -0x28 + 4*cpu 0x8 (Magic cookie, Exynos3250) AFTR -0x28 0x0 or last value during resume (Exynos542x) System suspend -============= ============================================ ================== - - -2. Secure mode - -Address: sysram_base_addr - -============= ============================================ ================== -Offset Value Purpose -============= ============================================ ================== -0x00 exynos4_secondary_startup Secondary CPU boot -0x04 exynos4_secondary_startup (Exynos542x) Secondary CPU boot -4*cpu exynos4_secondary_startup (Exynos4412) Secondary CPU boot -0x20 exynos_cpu_resume (Exynos4210 r1.0) AFTR -0x24 0xfcba0d10 (Magic cookie, Exynos4210 r1.0) AFTR -============= ============================================ ================== - -Address: pmu_base_addr - -============= ============================================ ================== -Offset Value Purpose -============= ============================================ ================== -0x0800 exynos_cpu_resume AFTR, suspend -0x0800 mcpm_entry_point (Exynos542x with MCPM) AFTR, suspend -0x0804 0xfcba0d10 (Magic cookie) AFTR -0x0804 0x00000bad (Magic cookie) System suspend -0x0814 exynos4_secondary_startup (Exynos4210 r1.1) Secondary CPU boot -0x0818 0xfcba0d10 (Magic cookie, Exynos4210 r1.1) AFTR -0x081C exynos_cpu_resume (Exynos4210 r1.1) AFTR -============= ============================================ ================== - -3. Other (regardless of secure/non-secure mode) - -Address: pmu_base_addr - -============= =============================== =============================== -Offset Value Purpose -============= =============================== =============================== -0x0908 Non-zero Secondary CPU boot up indicator - on Exynos3250 and Exynos542x -============= =============================== =============================== - - -4. Glossary - -AFTR - ARM Off Top Running, a low power mode, Cortex cores and many other -modules are power gated, except the TOP modules -MCPM - Multi-Cluster Power Management |