Merge branch 'dma-size' of git://git.yxit.co.uk/linux into devel-stable

30 files changed, 86 insertions, 82 deletions

diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h
index 7a21d0bf7134..7f27fab9d404 100644
--- a/arch/arm/include/asm/dma-mapping.h
+++ b/arch/arm/include/asm/dma-mapping.h
@@ -205,6 +205,13 @@ extern void *dma_alloc_writecombine(struct device *, size_t, dma_addr_t *,
 int dma_mmap_writecombine(struct device *, struct vm_area_struct *,
                 void *, dma_addr_t, size_t);
 
+/*
+ * This can be called during boot to increase the size of the consistent
+ * DMA region above it's default value of 2MB. It must be called before the
+ * memory allocator is initialised, i.e. before any core_initcall.
+ */
+extern void __init init_consistent_dma_size(unsigned long size);
+
 
 #ifdef CONFIG_DMABOUNCE
 /*
diff --git a/arch/arm/include/asm/memory.h b/arch/arm/include/asm/memory.h
index b8de516e600e..652fccca4952 100644
--- a/arch/arm/include/asm/memory.h
+++ b/arch/arm/include/asm/memory.h
@@ -77,16 +77,7 @@
  */
 #define IOREMAP_MAX_ORDER       24
 
-/*
- * Size of DMA-consistent memory region.  Must be multiple of 2M,
- * between 2MB and 14MB inclusive.
- */
-#ifndef CONSISTENT_DMA_SIZE
-#define CONSISTENT_DMA_SIZE     SZ_2M
-#endif
-
 #define CONSISTENT_END          (0xffe00000UL)
-#define CONSISTENT_BASE         (CONSISTENT_END - CONSISTENT_DMA_SIZE)
 
 #else /* CONFIG_MMU */
 
diff --git a/arch/arm/mach-at91/at91sam9g45.c b/arch/arm/mach-at91/at91sam9g45.c
index e04c5fb6f1ee..1532b508c814 100644
--- a/arch/arm/mach-at91/at91sam9g45.c
+++ b/arch/arm/mach-at91/at91sam9g45.c
@@ -12,6 +12,7 @@
 
 #include <linux/module.h>
 #include <linux/pm.h>
+#include <linux/dma-mapping.h>
 
 #include <asm/irq.h>
 #include <asm/mach/arch.h>
@@ -319,6 +320,7 @@ static void at91sam9g45_poweroff(void)
 static void __init at91sam9g45_map_io(void)
 {
         at91_init_sram(0, AT91SAM9G45_SRAM_BASE, AT91SAM9G45_SRAM_SIZE);
+        init_consistent_dma_size(SZ_4M);
 }
 
 static void __init at91sam9g45_initialize(void)
diff --git a/arch/arm/mach-at91/include/mach/at91sam9g45.h b/arch/arm/mach-at91/include/mach/at91sam9g45.h
index 2c611b9a0138..406bb6496805 100644
--- a/arch/arm/mach-at91/include/mach/at91sam9g45.h
+++ b/arch/arm/mach-at91/include/mach/at91sam9g45.h
@@ -128,8 +128,6 @@
 #define AT91SAM9G45_EHCI_BASE   0x00800000      /* USB Host controller (EHCI) */
 #define AT91SAM9G45_VDEC_BASE   0x00900000      /* Video Decoder Controller */
 
-#define CONSISTENT_DMA_SIZE     SZ_4M
-
 /*
  * DMA peripheral identifiers
  * for hardware handshaking interface
diff --git a/arch/arm/mach-bcmring/include/mach/memory.h b/arch/arm/mach-bcmring/include/mach/memory.h
index 15162e4c75f9..8848a5bb3445 100644
--- a/arch/arm/mach-bcmring/include/mach/memory.h
+++ b/arch/arm/mach-bcmring/include/mach/memory.h
@@ -25,9 +25,4 @@
 
 #define PLAT_PHYS_OFFSET CFG_GLOBAL_RAM_BASE
 
-/*
- * Maximum DMA memory allowed is 14M
- */
-#define CONSISTENT_DMA_SIZE (SZ_16M - SZ_2M)
-
 #endif
diff --git a/arch/arm/mach-bcmring/mm.c b/arch/arm/mach-bcmring/mm.c
index 0f1c37e4523a..8616876abb9f 100644
--- a/arch/arm/mach-bcmring/mm.c
+++ b/arch/arm/mach-bcmring/mm.c
@@ -13,6 +13,7 @@
 *****************************************************************************/
 
 #include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
 #include <asm/mach/map.h>
 
 #include <mach/hardware.h>
@@ -53,4 +54,6 @@ void __init bcmring_map_io(void)
 {
 
         iotable_init(bcmring_io_desc, ARRAY_SIZE(bcmring_io_desc));
+        /* Maximum DMA memory allowed is 14M */
+        init_consistent_dma_size(14 << 20);
 }
diff --git a/arch/arm/mach-davinci/common.c b/arch/arm/mach-davinci/common.c
index 1d2557394235..865ffe5899ac 100644
--- a/arch/arm/mach-davinci/common.c
+++ b/arch/arm/mach-davinci/common.c
@@ -12,6 +12,7 @@
 #include <linux/io.h>
 #include <linux/etherdevice.h>
 #include <linux/davinci_emac.h>
+#include <linux/dma-mapping.h>
 
 #include <asm/tlb.h>
 #include <asm/mach/map.h>
@@ -86,6 +87,8 @@ void __init davinci_common_init(struct davinci_soc_info *soc_info)
                 iotable_init(davinci_soc_info.io_desc,
                                 davinci_soc_info.io_desc_num);
 
+        init_consistent_dma_size(14 << 20);
+
         /*
          * Normally devicemaps_init() would flush caches and tlb after
          * mdesc->map_io(), but we must also do it here because of the CPU
diff --git a/arch/arm/mach-davinci/include/mach/memory.h b/arch/arm/mach-davinci/include/mach/memory.h
index 78731944a70c..885d23319668 100644
--- a/arch/arm/mach-davinci/include/mach/memory.h
+++ b/arch/arm/mach-davinci/include/mach/memory.h
@@ -36,9 +36,4 @@
 #define DDR2_MCLKSTOPEN_BIT     BIT(30)
 #define DDR2_LPMODEN_BIT        BIT(31)
 
-/*
- * Increase size of DMA-consistent memory region
- */
-#define CONSISTENT_DMA_SIZE (14<<20)
-
 #endif /* __ASM_ARCH_MEMORY_H */
diff --git a/arch/arm/mach-omap1/io.c b/arch/arm/mach-omap1/io.c
index 870886a29594..1cfa1b6bb62b 100644
--- a/arch/arm/mach-omap1/io.c
+++ b/arch/arm/mach-omap1/io.c
@@ -121,6 +121,7 @@ void __init omap1_map_common_io(void)
 #endif
 
         omap_sram_init();
+        omap_init_consistent_dma_size();
 }
 
 /*
diff --git a/arch/arm/mach-omap2/io.c b/arch/arm/mach-omap2/io.c
index 2ce1ce6fb4db..d6d01cb7f28a 100644
--- a/arch/arm/mach-omap2/io.c
+++ b/arch/arm/mach-omap2/io.c
@@ -16,7 +16,6 @@
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */
-
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
@@ -250,6 +249,7 @@ static void __init _omap2_map_common_io(void)
 
         omap2_check_revision();
         omap_sram_init();
+        omap_init_consistent_dma_size();
 }
 
 #ifdef CONFIG_SOC_OMAP2420
diff --git a/arch/arm/mach-s3c64xx/cpu.c b/arch/arm/mach-s3c64xx/cpu.c
index 374e45e566b8..8dc05763a7eb 100644
--- a/arch/arm/mach-s3c64xx/cpu.c
+++ b/arch/arm/mach-s3c64xx/cpu.c
@@ -20,6 +20,7 @@
 #include <linux/serial_core.h>
 #include <linux/platform_device.h>
 #include <linux/io.h>
+#include <linux/dma-mapping.h>
 
 #include <mach/hardware.h>
 #include <mach/map.h>
@@ -145,6 +146,7 @@ void __init s3c64xx_init_io(struct map_desc *mach_desc, int size)
         /* initialise the io descriptors we need for initialisation */
         iotable_init(s3c_iodesc, ARRAY_SIZE(s3c_iodesc));
         iotable_init(mach_desc, size);
+        init_consistent_dma_size(SZ_8M);
 
         idcode = __raw_readl(S3C_VA_SYS + 0x118);
         if (!idcode) {
diff --git a/arch/arm/mach-s3c64xx/include/mach/memory.h b/arch/arm/mach-s3c64xx/include/mach/memory.h
index 4760cdae1eb6..b704669f95ff 100644
--- a/arch/arm/mach-s3c64xx/include/mach/memory.h
+++ b/arch/arm/mach-s3c64xx/include/mach/memory.h
@@ -15,6 +15,4 @@
 
 #define PLAT_PHYS_OFFSET     UL(0x50000000)
 
-#define CONSISTENT_DMA_SIZE     SZ_8M
-
 #endif
diff --git a/arch/arm/mach-s5p64x0/cpu.c b/arch/arm/mach-s5p64x0/cpu.c
index a5c00952ea35..8a938542c54d 100644
--- a/arch/arm/mach-s5p64x0/cpu.c
+++ b/arch/arm/mach-s5p64x0/cpu.c
@@ -20,6 +20,7 @@
 #include <linux/serial_core.h>
 #include <linux/platform_device.h>
 #include <linux/sched.h>
+#include <linux/dma-mapping.h>
 
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
@@ -111,6 +112,7 @@ void __init s5p6440_map_io(void)
 
         iotable_init(s5p64x0_iodesc, ARRAY_SIZE(s5p64x0_iodesc));
         iotable_init(s5p6440_iodesc, ARRAY_SIZE(s5p6440_iodesc));
+        init_consistent_dma_size(SZ_8M);
 }
 
 void __init s5p6450_map_io(void)
@@ -120,6 +122,7 @@ void __init s5p6450_map_io(void)
 
         iotable_init(s5p64x0_iodesc, ARRAY_SIZE(s5p64x0_iodesc));
         iotable_init(s5p6450_iodesc, ARRAY_SIZE(s5p6450_iodesc));
+        init_consistent_dma_size(SZ_8M);
 }
 
 /*
diff --git a/arch/arm/mach-s5p64x0/include/mach/memory.h b/arch/arm/mach-s5p64x0/include/mach/memory.h
index 365a6eb4b88f..b14cbc3f521b 100644
--- a/arch/arm/mach-s5p64x0/include/mach/memory.h
+++ b/arch/arm/mach-s5p64x0/include/mach/memory.h
@@ -14,6 +14,5 @@
 #define __ASM_ARCH_MEMORY_H __FILE__
 
 #define PLAT_PHYS_OFFSET                UL(0x20000000)
-#define CONSISTENT_DMA_SIZE     SZ_8M
 
 #endif /* __ASM_ARCH_MEMORY_H */
diff --git a/arch/arm/mach-s5pv210/cpu.c b/arch/arm/mach-s5pv210/cpu.c
index 79907ec78d43..91145720822c 100644
--- a/arch/arm/mach-s5pv210/cpu.c
+++ b/arch/arm/mach-s5pv210/cpu.c
@@ -20,6 +20,7 @@
 #include <linux/sysdev.h>
 #include <linux/platform_device.h>
 #include <linux/sched.h>
+#include <linux/dma-mapping.h>
 
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
@@ -119,6 +120,7 @@ static void s5pv210_sw_reset(void)
 void __init s5pv210_map_io(void)
 {
         iotable_init(s5pv210_iodesc, ARRAY_SIZE(s5pv210_iodesc));
+        init_consistent_dma_size(14 << 20);
 
         /* initialise device information early */
         s5pv210_default_sdhci0();
diff --git a/arch/arm/mach-s5pv210/include/mach/memory.h b/arch/arm/mach-s5pv210/include/mach/memory.h
index 7b5fcf0da0c4..2d3cfa221d5f 100644
--- a/arch/arm/mach-s5pv210/include/mach/memory.h
+++ b/arch/arm/mach-s5pv210/include/mach/memory.h
@@ -14,7 +14,6 @@
 #define __ASM_ARCH_MEMORY_H
 
 #define PLAT_PHYS_OFFSET                UL(0x20000000)
-#define CONSISTENT_DMA_SIZE     (SZ_8M + SZ_4M + SZ_2M)
 
 /*
  * Sparsemem support
diff --git a/arch/arm/mach-shmobile/board-ag5evm.c b/arch/arm/mach-shmobile/board-ag5evm.c
index ce5c2513c6ce..167a67c5ca54 100644
--- a/arch/arm/mach-shmobile/board-ag5evm.c
+++ b/arch/arm/mach-shmobile/board-ag5evm.c
@@ -37,6 +37,7 @@
 #include <linux/mmc/sh_mobile_sdhi.h>
 #include <linux/mfd/tmio.h>
 #include <linux/sh_clk.h>
+#include <linux/dma-mapping.h>
 #include <video/sh_mobile_lcdc.h>
 #include <video/sh_mipi_dsi.h>
 #include <sound/sh_fsi.h>
@@ -446,6 +447,8 @@ static struct map_desc ag5evm_io_desc[] __initdata = {
 static void __init ag5evm_map_io(void)
 {
         iotable_init(ag5evm_io_desc, ARRAY_SIZE(ag5evm_io_desc));
+        /* DMA memory at 0xf6000000 - 0xffdfffff */
+        init_consistent_dma_size(158 << 20);
 
         /* setup early devices and console here as well */
         sh73a0_add_early_devices();
diff --git a/arch/arm/mach-shmobile/board-ap4evb.c b/arch/arm/mach-shmobile/board-ap4evb.c
index 9e0856b2f9e9..ec8f9d960e27 100644
--- a/arch/arm/mach-shmobile/board-ap4evb.c
+++ b/arch/arm/mach-shmobile/board-ap4evb.c
@@ -42,6 +42,7 @@
 #include <linux/leds.h>
 #include <linux/input/sh_keysc.h>
 #include <linux/usb/r8a66597.h>
+#include <linux/dma-mapping.h>
 
 #include <media/sh_mobile_ceu.h>
 #include <media/sh_mobile_csi2.h>
@@ -1170,6 +1171,8 @@ static struct map_desc ap4evb_io_desc[] __initdata = {
 static void __init ap4evb_map_io(void)
 {
         iotable_init(ap4evb_io_desc, ARRAY_SIZE(ap4evb_io_desc));
+        /* DMA memory at 0xf6000000 - 0xffdfffff */
+        init_consistent_dma_size(158 << 20);
 
         /* setup early devices and console here as well */
         sh7372_add_early_devices();
diff --git a/arch/arm/mach-shmobile/board-g3evm.c b/arch/arm/mach-shmobile/board-g3evm.c
index ef4613b993a2..8b620bf06221 100644
--- a/arch/arm/mach-shmobile/board-g3evm.c
+++ b/arch/arm/mach-shmobile/board-g3evm.c
@@ -32,6 +32,7 @@
 #include <linux/gpio.h>
 #include <linux/input.h>
 #include <linux/input/sh_keysc.h>
+#include <linux/dma-mapping.h>
 #include <mach/sh7367.h>
 #include <mach/common.h>
 #include <asm/mach-types.h>
@@ -260,6 +261,8 @@ static struct map_desc g3evm_io_desc[] __initdata = {
 static void __init g3evm_map_io(void)
 {
         iotable_init(g3evm_io_desc, ARRAY_SIZE(g3evm_io_desc));
+        /* DMA memory at 0xf6000000 - 0xffdfffff */
+        init_consistent_dma_size(158 << 20);
 
         /* setup early devices and console here as well */
         sh7367_add_early_devices();
diff --git a/arch/arm/mach-shmobile/board-g4evm.c b/arch/arm/mach-shmobile/board-g4evm.c
index 8e3c5559f27f..7719ddc5f591 100644
--- a/arch/arm/mach-shmobile/board-g4evm.c
+++ b/arch/arm/mach-shmobile/board-g4evm.c
@@ -33,6 +33,7 @@
 #include <linux/mmc/host.h>
 #include <linux/mmc/sh_mobile_sdhi.h>
 #include <linux/gpio.h>
+#include <linux/dma-mapping.h>
 #include <mach/sh7377.h>
 #include <mach/common.h>
 #include <asm/mach-types.h>
@@ -274,6 +275,8 @@ static struct map_desc g4evm_io_desc[] __initdata = {
 static void __init g4evm_map_io(void)
 {
         iotable_init(g4evm_io_desc, ARRAY_SIZE(g4evm_io_desc));
+        /* DMA memory at 0xf6000000 - 0xffdfffff */
+        init_consistent_dma_size(158 << 20);
 
         /* setup early devices and console here as well */
         sh7377_add_early_devices();
diff --git a/arch/arm/mach-shmobile/board-mackerel.c b/arch/arm/mach-shmobile/board-mackerel.c
index d41c01f83f15..671925dcf5f9 100644
--- a/arch/arm/mach-shmobile/board-mackerel.c
+++ b/arch/arm/mach-shmobile/board-mackerel.c
@@ -45,6 +45,7 @@
 #include <linux/tca6416_keypad.h>
 #include <linux/usb/r8a66597.h>
 #include <linux/usb/renesas_usbhs.h>
+#include <linux/dma-mapping.h>
 
 #include <video/sh_mobile_hdmi.h>
 #include <video/sh_mobile_lcdc.h>
@@ -1377,6 +1378,8 @@ static struct map_desc mackerel_io_desc[] __initdata = {
 static void __init mackerel_map_io(void)
 {
         iotable_init(mackerel_io_desc, ARRAY_SIZE(mackerel_io_desc));
+        /* DMA memory at 0xf6000000 - 0xffdfffff */
+        init_consistent_dma_size(158 << 20);
 
         /* setup early devices and console here as well */
         sh7372_add_early_devices();
diff --git a/arch/arm/mach-shmobile/include/mach/memory.h b/arch/arm/mach-shmobile/include/mach/memory.h
index ad00c3c258f4..0ffbe8155c76 100644
--- a/arch/arm/mach-shmobile/include/mach/memory.h
+++ b/arch/arm/mach-shmobile/include/mach/memory.h
@@ -4,7 +4,4 @@
 #define PLAT_PHYS_OFFSET        UL(CONFIG_MEMORY_START)
 #define MEM_SIZE        UL(CONFIG_MEMORY_SIZE)
 
-/* DMA memory at 0xf6000000 - 0xffdfffff */
-#define CONSISTENT_DMA_SIZE (158 << 20)
-
 #endif /* __ASM_MACH_MEMORY_H */
diff --git a/arch/arm/mach-u300/core.c b/arch/arm/mach-u300/core.c
index 399c89f14dfb..376b6dfdfae9 100644
--- a/arch/arm/mach-u300/core.c
+++ b/arch/arm/mach-u300/core.c
@@ -25,6 +25,7 @@
 #include <linux/err.h>
 #include <linux/mtd/nand.h>
 #include <linux/mtd/fsmc.h>
+#include <linux/dma-mapping.h>
 
 #include <asm/types.h>
 #include <asm/setup.h>
@@ -92,6 +93,8 @@ static struct map_desc u300_io_desc[] __initdata = {
 void __init u300_map_io(void)
 {
         iotable_init(u300_io_desc, ARRAY_SIZE(u300_io_desc));
+        /* We enable a real big DMA buffer if need be. */
+        init_consistent_dma_size(SZ_4M);
 }
 
 /*
diff --git a/arch/arm/mach-u300/include/mach/memory.h b/arch/arm/mach-u300/include/mach/memory.h
index 888e2e351ee1..38741da0d261 100644
--- a/arch/arm/mach-u300/include/mach/memory.h
+++ b/arch/arm/mach-u300/include/mach/memory.h
@@ -34,9 +34,4 @@
             (CONFIG_MACH_U300_ACCESS_MEM_SIZE & 1))*1024*1024 + 0x100)
 #endif
 
-/*
- * We enable a real big DMA buffer if need be.
- */
-#define CONSISTENT_DMA_SIZE SZ_4M
-
 #endif
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index 0a0a1e7c20d2..50be842e89fd 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -18,12 +18,14 @@
 #include <linux/device.h>
 #include <linux/dma-mapping.h>
 #include <linux/highmem.h>
+#include <linux/slab.h>
 
 #include <asm/memory.h>
 #include <asm/highmem.h>
 #include <asm/cacheflush.h>
 #include <asm/tlbflush.h>
 #include <asm/sizes.h>
+#include <asm/mach/arch.h>
 
 #include "mm.h"
 
@@ -117,26 +119,37 @@ static void __dma_free_buffer(struct page *page, size_t size)
 }
 
 #ifdef CONFIG_MMU
-/* Sanity check size */
-#if (CONSISTENT_DMA_SIZE % SZ_2M)
-#error "CONSISTENT_DMA_SIZE must be multiple of 2MiB"
-#endif
 
-#define CONSISTENT_OFFSET(x)    (((unsigned long)(x) - CONSISTENT_BASE) >> PAGE_SHIFT)
-#define CONSISTENT_PTE_INDEX(x) (((unsigned long)(x) - CONSISTENT_BASE) >> PGDIR_SHIFT)
-#define NUM_CONSISTENT_PTES (CONSISTENT_DMA_SIZE >> PGDIR_SHIFT)
+
+#define CONSISTENT_OFFSET(x)    (((unsigned long)(x) - consistent_base) >> PAGE_SHIFT)
+#define CONSISTENT_PTE_INDEX(x) (((unsigned long)(x) - consistent_base) >> PGDIR_SHIFT)
 
 /*
  * These are the page tables (2MB each) covering uncached, DMA consistent allocations
  */
-static pte_t *consistent_pte[NUM_CONSISTENT_PTES];
+static pte_t **consistent_pte;
+
+#define DEFAULT_CONSISTENT_DMA_SIZE SZ_2M
+
+unsigned long consistent_base = CONSISTENT_END - DEFAULT_CONSISTENT_DMA_SIZE;
+
+void __init init_consistent_dma_size(unsigned long size)
+{
+        unsigned long base = CONSISTENT_END - ALIGN(size, SZ_2M);
+
+        BUG_ON(consistent_pte); /* Check we're called before DMA region init */
+        BUG_ON(base < VMALLOC_END);
+
+        /* Grow region to accommodate specified size  */
+        if (base < consistent_base)
+                consistent_base = base;
+}
 
 #include "vmregion.h"
 
 static struct arm_vmregion_head consistent_head = {
         .vm_lock        = __SPIN_LOCK_UNLOCKED(&consistent_head.vm_lock),
         .vm_list        = LIST_HEAD_INIT(consistent_head.vm_list),
-        .vm_start       = CONSISTENT_BASE,
         .vm_end         = CONSISTENT_END,
 };
 
@@ -155,7 +168,17 @@ static int __init consistent_init(void)
         pmd_t *pmd;
         pte_t *pte;
         int i = 0;
-        u32 base = CONSISTENT_BASE;
+        unsigned long base = consistent_base;
+        unsigned long num_ptes = (CONSISTENT_END - base) >> PGDIR_SHIFT;
+
+        consistent_pte = kmalloc(num_ptes * sizeof(pte_t), GFP_KERNEL);
+        if (!consistent_pte) {
+                pr_err("%s: no memory\n", __func__);
+                return -ENOMEM;
+        }
+
+        pr_debug("DMA memory: 0x%08lx - 0x%08lx:\n", base, CONSISTENT_END);
+        consistent_head.vm_start = base;
 
         do {
                 pgd = pgd_offset(&init_mm, base);
@@ -198,7 +221,7 @@ __dma_alloc_remap(struct page *page, size_t size, gfp_t gfp, pgprot_t prot)
         size_t align;
         int bit;
 
-        if (!consistent_pte[0]) {
+        if (!consistent_pte) {
                 printk(KERN_ERR "%s: not initialised\n", __func__);
                 dump_stack();
                 return NULL;
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index 91bca355cd31..64ab41348f30 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -653,9 +653,6 @@ void __init mem_init(void)
                         "    ITCM    : 0x%08lx - 0x%08lx   (%4ld kB)\n"
 #endif
                         "    fixmap  : 0x%08lx - 0x%08lx   (%4ld kB)\n"
-#ifdef CONFIG_MMU
-                        "    DMA     : 0x%08lx - 0x%08lx   (%4ld MB)\n"
-#endif
                         "    vmalloc : 0x%08lx - 0x%08lx   (%4ld MB)\n"
                         "    lowmem  : 0x%08lx - 0x%08lx   (%4ld MB)\n"
 #ifdef CONFIG_HIGHMEM
@@ -674,9 +671,6 @@ void __init mem_init(void)
                         MLK(ITCM_OFFSET, (unsigned long) itcm_end),
 #endif
                         MLK(FIXADDR_START, FIXADDR_TOP),
-#ifdef CONFIG_MMU
-                        MLM(CONSISTENT_BASE, CONSISTENT_END),
-#endif
                         MLM(VMALLOC_START, VMALLOC_END),
                         MLM(PAGE_OFFSET, (unsigned long)high_memory),
 #ifdef CONFIG_HIGHMEM
@@ -699,9 +693,6 @@ void __init mem_init(void)
          * be detected at build time already.
          */
 #ifdef CONFIG_MMU
-        BUILD_BUG_ON(VMALLOC_END                        > CONSISTENT_BASE);
-        BUG_ON(VMALLOC_END                              > CONSISTENT_BASE);
-
         BUILD_BUG_ON(TASK_SIZE                          > MODULES_VADDR);
         BUG_ON(TASK_SIZE                                > MODULES_VADDR);
 #endif
diff --git a/arch/arm/plat-mxc/include/mach/memory.h b/arch/arm/plat-mxc/include/mach/memory.h
index 11be5cdbdd1a..3ec84b902243 100644
--- a/arch/arm/plat-mxc/include/mach/memory.h
+++ b/arch/arm/plat-mxc/include/mach/memory.h
@@ -40,19 +40,4 @@
 # endif
 #endif
 
-#if defined(CONFIG_MX3_VIDEO)
-/*
- * Increase size of DMA-consistent memory region.
- * This is required for mx3 camera driver to capture at least two QXGA frames.
- */
-#define CONSISTENT_DMA_SIZE SZ_8M
-
-#elif defined(CONFIG_MX1_VIDEO) || defined(CONFIG_VIDEO_MX2_HOSTSUPPORT)
-/*
- * Increase size of DMA-consistent memory region.
- * This is required for i.MX camera driver to capture at least four VGA frames.
- */
-#define CONSISTENT_DMA_SIZE SZ_4M
-#endif /* CONFIG_MX1_VIDEO || CONFIG_VIDEO_MX2_HOSTSUPPORT */
-
 #endif /* __ASM_ARCH_MXC_MEMORY_H__ */
diff --git a/arch/arm/plat-omap/include/plat/io.h b/arch/arm/plat-omap/include/plat/io.h
index d72ec85c97e6..ebe67ea8d068 100644
--- a/arch/arm/plat-omap/include/plat/io.h
+++ b/arch/arm/plat-omap/include/plat/io.h
@@ -309,6 +309,8 @@ extern void omap2_init_common_devices(struct omap_sdrc_params *sdrc_cs0,
 void __iomem *omap_ioremap(unsigned long phys, size_t size, unsigned int type);
 void omap_iounmap(volatile void __iomem *addr);
 
+extern void __init omap_init_consistent_dma_size(void);
+
 #endif
 
 #endif
diff --git a/arch/arm/plat-omap/include/plat/memory.h b/arch/arm/plat-omap/include/plat/memory.h
index e6720aa2d553..7f9df6f1e113 100644
--- a/arch/arm/plat-omap/include/plat/memory.h
+++ b/arch/arm/plat-omap/include/plat/memory.h
@@ -85,18 +85,5 @@
 
 #endif  /* CONFIG_ARCH_OMAP15XX */
 
-/* Override the ARM default */
-#ifdef CONFIG_FB_OMAP_CONSISTENT_DMA_SIZE
-
-#if (CONFIG_FB_OMAP_CONSISTENT_DMA_SIZE == 0)
-#undef CONFIG_FB_OMAP_CONSISTENT_DMA_SIZE
-#define CONFIG_FB_OMAP_CONSISTENT_DMA_SIZE 2
-#endif
-
-#define CONSISTENT_DMA_SIZE \
-        (((CONFIG_FB_OMAP_CONSISTENT_DMA_SIZE + 1) & ~1) * 1024 * 1024)
-
-#endif
-
 #endif
 
diff --git a/arch/arm/plat-omap/io.c b/arch/arm/plat-omap/io.c
index f1ecfa9fc61d..e9b0e23edd0a 100644
--- a/arch/arm/plat-omap/io.c
+++ b/arch/arm/plat-omap/io.c
@@ -12,6 +12,7 @@
 #include <linux/module.h>
 #include <linux/io.h>
 #include <linux/mm.h>
+#include <linux/dma-mapping.h>
 
 #include <plat/omap7xx.h>
 #include <plat/omap1510.h>
@@ -139,3 +140,10 @@ void omap_iounmap(volatile void __iomem *addr)
                 __iounmap(addr);
 }
 EXPORT_SYMBOL(omap_iounmap);
+
+void __init omap_init_consistent_dma_size(void)
+{
+#ifdef CONFIG_FB_OMAP_CONSISTENT_DMA_SIZE
+        init_consistent_dma_size(CONFIG_FB_OMAP_CONSISTENT_DMA_SIZE << 20);
+#endif
+}