3 files changed, 31 insertions, 0 deletions

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index a930e5c5672..44456e16302 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -594,6 +594,20 @@ config ARCH_LH7A40X
           core with a wide array of integrated devices for
           hand-held and low-power applications.
 
+config ARCH_U300
+        bool "ST-Ericsson U300 Series"
+        depends on MMU
+        select CPU_ARM926T
+        select ARM_AMBA
+        select ARM_VIC
+        select GENERIC_TIME
+        select GENERIC_CLOCKEVENTS
+        select HAVE_CLK
+        select COMMON_CLKDEV
+        select GENERIC_GPIO
+        help
+          Support for ST-Ericsson U300 series mobile platforms.
+
 config ARCH_DAVINCI
         bool "TI DaVinci"
         select CPU_ARM926T
@@ -705,6 +719,8 @@ source "arch/arm/mach-ks8695/Kconfig"
 
 source "arch/arm/mach-msm/Kconfig"
 
+source "arch/arm/mach-u300/Kconfig"
+
 source "arch/arm/mach-w90x900/Kconfig"
 
 # Definitions to make life easier
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 885a83724b9..20084c50c23 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -149,6 +149,7 @@ machine-$(CONFIG_ARCH_S3C24A0)		:= s3c24a0
 machine-$(CONFIG_ARCH_S3C64XX)          := s3c6400 s3c6410
 machine-$(CONFIG_ARCH_SA1100)           := sa1100
 machine-$(CONFIG_ARCH_SHARK)            := shark
+machine-$(CONFIG_ARCH_U300)             := u300
 machine-$(CONFIG_ARCH_VERSATILE)        := versatile
 machine-$(CONFIG_ARCH_W90X900)          := w90x900
 machine-$(CONFIG_FOOTBRIDGE)            := footbridge
diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index e6344ece00c..39fca4e416e 100644
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -839,6 +839,20 @@ void __init reserve_node_zero(pg_data_t *pgdat)
                 reserve_bootmem_node(pgdat, 0xa0200000, 0x1000,
                                 BOOTMEM_EXCLUSIVE);
 
+        /*
+         * U300 - This platform family can share physical memory
+         * between two ARM cpus, one running Linux and the other
+         * running another OS.
+         */
+        if (machine_is_u300()) {
+#ifdef CONFIG_MACH_U300_SINGLE_RAM
+#if ((CONFIG_MACH_U300_ACCESS_MEM_SIZE & 1) == 1) &&    \
+        CONFIG_MACH_U300_2MB_ALIGNMENT_FIX
+                res_size = 0x00100000;
+#endif
+#endif
+        }
+
 #ifdef CONFIG_SA1111
         /*
          * Because of the SA1111 DMA bug, we want to preserve our