bootwrapper: Add support for the sandpoint platform

This patch adds support for the Freescale Sandpoint platform to the bootwrapper.

--

 Makefile    |    3 +
 mpc10x.c    |  109 ++++++++++++++++++++++++++++++++++++++++++++
 sandpoint.c |  147 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 259 insertions(+)

--

index 3e767e5..daad857 100644
@@ -40,6 +40,9 @@ src-boot := crt0.S string.S stdio.c main
 ifeq ($(CONFIG_PPC_MULTIPLATFORM),y)
 src-boot += of.c
 endif
+ifeq ($(CONFIG_SANDPOINT),y)
+src-boot += sandpoint.c mpc10x.c dink.c serial.c ns16550.c util.S
+endif
 src-boot += $(zlib)
 src-boot := $(addprefix $(obj)/, $(src-boot))
 obj-boot := $(addsuffix .o, $(basename $(src-boot)))

Mark,

you put sandpoint.c and mpc10x.c under boot... I don't quite understand your concept now: you mean this is the code needed to __boot__ sandpoint. Ok. I can also imagine that as soon as the system is up you don't need any further specific code - only .init* sections. But - does this mean that every platform will now put its support flat under boot? Or is it a special case? Or are there also run-time fixups that you didn't include with this patch-series? Also <board>_reset doesn't quite fit under boot, or am I misunderstanding something?

Thanks
Guennadi
---
Guennadi Liakhovetski

Hi Guennadi.

Depends on what you mean by "__boot__". This is the code needed to prepare things--the flat dev tree in this case--so that the kernel can boot when running the DINK firmware on a sandpoint.

You need to read <file:Documentation/powerpc/booting-without-of.txt>.

Yes it does. Follow exit().

Yes, you're missing the whole point of the patch series...

Did you read "[PATCH 0/6] bootwrapper: arch/powerpc/boot code reorg patches"?

The intent was not to add kernel support for the sanpoint. The intent was to solicit comments on a reorg of the bootwrapper code.

Mark

I should rephrase this to, "so that the kernel will boot on a system that has DINK as its firmware."

Mark

...after getting some vitamins on irc and re-reading some emails, I finally realised what the stuff under boot is for. Expect more confusion from me:-)

Thanks
Guennadi
---
Guennadi Liakhovetski

Ok, I think, now I have an idea what all these wrappers are about:

we want to be able to boot linux from a number of different environments:

OF

various firmwares / boot ROMs / bootloaders with very different capabilities of running foreign code and different calling conventions

"native" Linux bootloaders like u-Boot, etc.

kexec

...

and the chosen approach is to have a kernel proper common to all these possibilities, and "wrappers". These wrappers are boot-method and board specific, are distributed with the kernel, located under arch/powerpc/boot, get linked with the kernel proper, fdt, with various compression possibilities...

Have I got it right now? One of the reasons of me having problems to understand this is that on ARM we just say "to boot kernel you have to have MMU switched off, registers must contain this and that, you have to prepare a list of ATAGs, copy the kernel to a certain address, and jump to it. If you don't do that you cannot run Linux on your system":-)

Thanks
Guennadi
---
Guennadi Liakhovetski

Sure, everybody that's familiar with ARM Linux is aware of that. That's what the new fdt requirement in arch/powerpc/ does for PPC as well. arch/powerpc/boot/ wrapper code isn't technically part of the kernel, it's merely distributed with the kernel source for convenience. It's a boot shim to translate from "legacy" firmwares (since they aren't easily replaced) to the standard method. It is independent of the kernel proper.

-Matt

This patch adds support for the Freescale Sandpoint platform to the bootwrapper.

--

 boot/Makefile                     |    3 
 boot/dts/sandpoint.dts            |  218 +++++++
 boot/mpc10x.c                     |  109 +++
 boot/sandpoint.c                  |  147 +++++
 configs/sandpoint_defconfig       | 1111 ++++++++++++++++++++++++++++++++++++++
 platforms/embedded6xx/Kconfig     |    2 
 platforms/embedded6xx/Makefile    |    1 
 platforms/embedded6xx/sandpoint.c |  385 +++++++++++++
 8 files changed, 1976 insertions(+)

--

index f1877ac..44a3055 100644
@@ -42,6 +42,9 @@ src-boot += of.c
 else
 src-boot += flatdevtree_misc.c
 endif
+ifeq ($(CONFIG_SANDPOINT),y)
+src-boot += sandpoint.c mpc10x.c simple_alloc.c serial.c ns16550.c util.S
+endif
 src-boot += $(zlib)
 src-boot := $(addprefix $(obj)/, $(src-boot))
 obj-boot := $(addsuffix .o, $(basename $(src-boot)))

index 234a861..e5ac829 100644
@@ -69,7 +69,9 @@ config PRPMC800
 
 config SANDPOINT
 	bool "Motorola-Sandpoint"
+	select MPIC
 	select PPC_I8259
+	select PPC_UDBG_16550
 	help
 	  Select SANDPOINT if configuring for a Motorola Sandpoint X3
 	  (any flavor).

index fa499fe..042b6ca 100644
@@ -2,3 +2,4 @@ #
 # Makefile for the 6xx/7xx/7xxxx linux kernel.
 #
 obj-$(CONFIG_MPC7448HPC2)	+= mpc7448_hpc2.o
+obj-$(CONFIG_SANDPOINT)		+= sandpoint.o

This replaces the previous patch in this thread which had some errors in the sandpoint.dts file.

Mark
--

This patch adds support for the Freescale Sandpoint platform to the bootwrapper.

--

 boot/Makefile                     |    3 
 boot/dts/sandpoint.dts            |  217 +++++++
 boot/mpc10x.c                     |  109 +++
 boot/sandpoint.c                  |  147 +++++
 configs/sandpoint_defconfig       | 1111 ++++++++++++++++++++++++++++++++++++++
 platforms/embedded6xx/Kconfig     |    2 
 platforms/embedded6xx/Makefile    |    1 
 platforms/embedded6xx/sandpoint.c |  385 +++++++++++++
 8 files changed, 1975 insertions(+)

--

index f1877ac..44a3055 100644
@@ -42,6 +42,9 @@ src-boot += of.c
 else
 src-boot += flatdevtree_misc.c
 endif
+ifeq ($(CONFIG_SANDPOINT),y)
+src-boot += sandpoint.c mpc10x.c simple_alloc.c serial.c ns16550.c util.S
+endif
 src-boot += $(zlib)
 src-boot := $(addprefix $(obj)/, $(src-boot))
 obj-boot := $(addsuffix .o, $(basename $(src-boot)))

index 234a861..e5ac829 100644
@@ -69,7 +69,9 @@ config PRPMC800
 
 config SANDPOINT
 	bool "Motorola-Sandpoint"
+	select MPIC
 	select PPC_I8259
+	select PPC_UDBG_16550
 	help
 	  Select SANDPOINT if configuring for a Motorola Sandpoint X3
 	  (any flavor).

index fa499fe..042b6ca 100644
@@ -2,3 +2,4 @@ #
 # Makefile for the 6xx/7xx/7xxxx linux kernel.
 #
 obj-$(CONFIG_MPC7448HPC2)	+= mpc7448_hpc2.o
+obj-$(CONFIG_SANDPOINT)		+= sandpoint.o