diff mbox

Documentation: ARM: EXYNOS: Extend boot loader interface documentation

Message ID 1436065011-6999-1-git-send-email-k.kozlowski.k@gmail.com (mailing list archive)
State New, archived
Headers show

Commit Message

Krzysztof Kozlowski July 5, 2015, 2:56 a.m. UTC 
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>
---
 Documentation/arm/Samsung/Bootloader-interface.txt | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

Comments

Jonathan Corbet July 10, 2015, 8 p.m. UTC | #1 
On Sun,  5 Jul 2015 11:56:51 +0900
Krzysztof Kozlowski <k.kozlowski.k@gmail.com> wrote:

> 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).

I have to assume that the new info here is correct...hopefully somebody
will scream if that's not true.  Applied to the docs tree, thanks.

jon
diff mbox

Patch

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