powerpc/kconfig: Kill PPC_MULTIPLATFORM

CONFIG_PPC_MULTIPLATFORM is a remain of the pre-powerpc days and isn't
really meaningful anymore. It was basically equivalent to PPC64 || 6xx.

This removes it along with the following changes:

 - 32-bit platforms that relied on PPC32 && PPC_MULTIPLATFORM now rely
   on 6xx which is what they want anyway.

 - A new symbol, PPC_BOOK3S, is defined that represent compliance with
   the "Server" variant of the architecture. This is set when either 6xx
   or PPC64 is set and open the door for future BOOK3E 64-bit.

 - 64-bit platforms that relied on PPC64 && PPC_MULTIPLATFORM now use
   PPC64 && PPC_BOOK3S

 - A separate and selectable CONFIG_PPC_OF_BOOT_TRAMPOLINE option is now
   used to control the use of prom_init.c

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 15 insertions, 12 deletions

diff --git a/arch/powerpc/platforms/Kconfig b/arch/powerpc/platforms/Kconfig
index b4ab3728653e..68b9b8fd9f85 100644
--- a/arch/powerpc/platforms/Kconfig
+++ b/arch/powerpc/platforms/Kconfig
@@ -1,14 +1,5 @@
 menu "Platform support"
 
-config PPC_MULTIPLATFORM
-        bool
-        depends on PPC64 || 6xx
-        default y
-
-config CLASSIC32
-        def_bool y
-        depends on 6xx && PPC_MULTIPLATFORM
-
 source "arch/powerpc/platforms/pseries/Kconfig"
 source "arch/powerpc/platforms/iseries/Kconfig"
 source "arch/powerpc/platforms/chrp/Kconfig"
@@ -32,12 +23,24 @@ source "arch/powerpc/platforms/amigaone/Kconfig"
 
 config PPC_NATIVE
         bool
-        depends on PPC_MULTIPLATFORM
+        depends on 6xx || PPC64
         help
           Support for running natively on the hardware, i.e. without
           a hypervisor. This option is not user-selectable but should
           be selected by all platforms that need it.
 
+config PPC_OF_BOOT_TRAMPOLINE
+        bool "Support booting from Open Firmware or yaboot"
+        depends on 6xx || PPC64
+        default y
+        help
+          Support from booting from Open Firmware or yaboot using an
+          Open Firmware client interface. This enables the kernel to
+          communicate with open firmware to retrieve system informations
+          such as the device tree.
+
+          In case of doubt, say Y
+
 config UDBG_RTAS_CONSOLE
         bool "RTAS based debug console"
         depends on PPC_RTAS
@@ -71,7 +74,7 @@ config PPC_I8259
 
 config U3_DART
         bool
-        depends on PPC_MULTIPLATFORM && PPC64
+        depends on PPC64
         default n
 
 config PPC_RTAS
@@ -188,7 +191,7 @@ config PPC601_SYNC_FIX
 
 config TAU
         bool "On-chip CPU temperature sensor support"
-        depends on CLASSIC32
+        depends on 6xx
         help
           G3 and G4 processors have an on-chip temperature sensor called the
           'Thermal Assist Unit (TAU)', which, in theory, can measure the on-die