diff options
authorKrzysztof Kozlowski <>2015-07-05 11:56:51 +0900
committerJonathan Corbet <>2015-07-10 13:59:35 -0600
commit9ba6e988c7208e3cb1f71862cc578397ae938159 (patch)
parent60498bb58e9a614b9706f250667033f30632a25c (diff)
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 <> Signed-off-by: Jonathan Corbet <>
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