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Commit 9ba6e988 authored by Krzysztof Kozlowski's avatar Krzysztof Kozlowski Committed by Jonathan Corbet
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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: default avatarKrzysztof Kozlowski <k.kozlowski.k@gmail.com>
Signed-off-by: default avatarJonathan Corbet <corbet@lwn.net>
parent 60498bb5

Documentation/arm/Samsung/Bootloader-interface.txt

+14 −1
Original line number Diff line number Diff line
@@ -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