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| author | Krzysztof Kozlowski <k.kozlowski.k@gmail.com> | 2015-07-05 05:56:51 +0300 |
|---|---|---|
| committer | Jonathan Corbet <corbet@lwn.net> | 2015-07-10 22:59:35 +0300 |
| commit | 9ba6e988c7208e3cb1f71862cc578397ae938159 (patch) | |
| tree | 6369dc31389e402a694fe407c90ffffd7e763364 /Documentation | |
| parent | 60498bb58e9a614b9706f250667033f30632a25c (diff) | |
| download | linux-9ba6e988c7208e3cb1f71862cc578397ae938159.tar.xz | |
Documentation: ARM: EXYNOS: Extend boot loader interface documentation
Extend the kernel-bootloader interface documentation with usage of
register INFORM1 (0x0804) and different CPU resume address on Exynos542x
family (with Multi-Cluster Power Management enabled).
Additionally add glossary and reformat section titles.
Signed-off-by: Krzysztof Kozlowski <k.kozlowski.k@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/arm/Samsung/Bootloader-interface.txt | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/Documentation/arm/Samsung/Bootloader-interface.txt b/Documentation/arm/Samsung/Bootloader-interface.txt index b96ead9a6919..df8d4fb85939 100644 --- a/Documentation/arm/Samsung/Bootloader-interface.txt +++ b/Documentation/arm/Samsung/Bootloader-interface.txt @@ -15,6 +15,7 @@ executing kernel. 1. Non-Secure mode + Address: sysram_ns_base_addr Offset Value Purpose ============================================================================= @@ -28,6 +29,7 @@ Offset Value Purpose 2. Secure mode + Address: sysram_base_addr Offset Value Purpose ============================================================================= @@ -40,14 +42,25 @@ Offset Value Purpose Address: pmu_base_addr Offset Value Purpose ============================================================================= -0x0800 exynos_cpu_resume AFTR +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 (only Exynos3250) Secondary CPU boot up indicator + + +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 |