Merge master.kernel.org:/home/rmk/linux-2.6-arm

1 files changed, 36 insertions, 1 deletions

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 3cfd82a05b20..5959e36c3b4c 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -180,6 +180,7 @@ config ARCH_OMAP
 config ARCH_VERSATILE
         bool "Versatile"
         select ARM_AMBA
+        select ARM_VIC
         select ICST307
         help
           This enables support for ARM Ltd Versatile board.
@@ -400,6 +401,38 @@ config NO_IDLE_HZ
           Currently at least OMAP, PXA2xx and SA11x0 platforms are known
           to have accurate timekeeping with dynamic tick.
 
+config AEABI
+        bool "Use the ARM EABI to compile the kernel"
+        help
+          This option allows for the kernel to be compiled using the latest
+          ARM ABI (aka EABI).  This is only useful if you are using a user
+          space environment that is also compiled with EABI.
+
+          Since there are major incompatibilities between the legacy ABI and
+          EABI, especially with regard to structure member alignment, this
+          option also changes the kernel syscall calling convention to
+          disambiguate both ABIs and allow for backward compatibility support
+          (selected with CONFIG_OABI_COMPAT).
+
+          To use this you need GCC version 4.0.0 or later.
+
+config OABI_COMPAT
+        bool "Allow old ABI binaries to run with this kernel"
+        depends on AEABI
+        default y
+        help
+          This option preserves the old syscall interface along with the
+          new (ARM EABI) one. It also provides a compatibility layer to
+          intercept syscalls that have structure arguments which layout
+          in memory differs between the legacy ABI and the new ARM EABI
+          (only for non "thumb" binaries). This option adds a tiny
+          overhead to all syscalls and produces a slightly larger kernel.
+          If you know you'll be using only pure EABI user space then you
+          can say N here. If this option is not selected and you attempt
+          to execute a legacy ABI binary then the result will be
+          UNPREDICTABLE (in fact it can be predicted that it won't work
+          at all). If in doubt say Y.
+
 config ARCH_DISCONTIGMEM_ENABLE
         bool
         default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
@@ -586,6 +619,7 @@ comment "At least one emulation must be selected"
 
 config FPE_NWFPE
         bool "NWFPE math emulation"
+        depends on !AEABI || OABI_COMPAT
         ---help---
           Say Y to include the NWFPE floating point emulator in the kernel.
           This is necessary to run most binaries. Linux does not currently
@@ -609,7 +643,7 @@ config FPE_NWFPE_XP
 
 config FPE_FASTFPE
         bool "FastFPE math emulation (EXPERIMENTAL)"
-        depends on !CPU_32v3 && EXPERIMENTAL
+        depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
         ---help---
           Say Y here to include the FAST floating point emulator in the kernel.
           This is an experimental much faster emulator which now also has full
@@ -641,6 +675,7 @@ source "fs/Kconfig.binfmt"
 
 config ARTHUR
         tristate "RISC OS personality"
+        depends on !AEABI
         help
           Say Y here to include the kernel code necessary if you want to run
           Acorn RISC OS/Arthur binaries under Linux. This code is still very