Base Au1200 2.6 support.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

9 files changed, 685 insertions, 105 deletions

diff --git a/arch/mips/au1000/common/au1xxx_irqmap.c b/arch/mips/au1000/common/au1xxx_irqmap.c
index 8a0f39f67c59..0b2c03c52319 100644
--- a/arch/mips/au1000/common/au1xxx_irqmap.c
+++ b/arch/mips/au1000/common/au1xxx_irqmap.c
@@ -173,14 +173,14 @@ au1xxx_irq_map_t au1xxx_ic0_map[] = {
         { AU1550_PSC1_INT, INTC_INT_HIGH_LEVEL, 0},
         { AU1550_PSC2_INT, INTC_INT_HIGH_LEVEL, 0},
         { AU1550_PSC3_INT, INTC_INT_HIGH_LEVEL, 0},
-        { AU1550_TOY_INT, INTC_INT_RISE_EDGE, 0 },
-        { AU1550_TOY_MATCH0_INT, INTC_INT_RISE_EDGE, 0 },
-        { AU1550_TOY_MATCH1_INT, INTC_INT_RISE_EDGE, 0 },
-        { AU1550_TOY_MATCH2_INT, INTC_INT_RISE_EDGE, 1 },
-        { AU1550_RTC_INT, INTC_INT_RISE_EDGE, 0 },
-        { AU1550_RTC_MATCH0_INT, INTC_INT_RISE_EDGE, 0 },
-        { AU1550_RTC_MATCH1_INT, INTC_INT_RISE_EDGE, 0 },
-        { AU1550_RTC_MATCH2_INT, INTC_INT_RISE_EDGE, 0 },
+        { AU1000_TOY_INT, INTC_INT_RISE_EDGE, 0 },
+        { AU1000_TOY_MATCH0_INT, INTC_INT_RISE_EDGE, 0 },
+        { AU1000_TOY_MATCH1_INT, INTC_INT_RISE_EDGE, 0 },
+        { AU1000_TOY_MATCH2_INT, INTC_INT_RISE_EDGE, 1 },
+        { AU1000_RTC_INT, INTC_INT_RISE_EDGE, 0 },
+        { AU1000_RTC_MATCH0_INT, INTC_INT_RISE_EDGE, 0 },
+        { AU1000_RTC_MATCH1_INT, INTC_INT_RISE_EDGE, 0 },
+        { AU1000_RTC_MATCH2_INT, INTC_INT_RISE_EDGE, 0 },
         { AU1550_NAND_INT, INTC_INT_RISE_EDGE, 0},
         { AU1550_USB_DEV_REQ_INT, INTC_INT_HIGH_LEVEL, 0 },
         { AU1550_USB_DEV_SUS_INT, INTC_INT_RISE_EDGE, 0 },
@@ -201,14 +201,14 @@ au1xxx_irq_map_t au1xxx_ic0_map[] = {
         { AU1200_PSC1_INT, INTC_INT_HIGH_LEVEL, 0},
         { AU1200_AES_INT, INTC_INT_HIGH_LEVEL, 0},
         { AU1200_CAMERA_INT, INTC_INT_HIGH_LEVEL, 0},
-        { AU1200_TOY_INT, INTC_INT_RISE_EDGE, 0 },
-        { AU1200_TOY_MATCH0_INT, INTC_INT_RISE_EDGE, 0 },
-        { AU1200_TOY_MATCH1_INT, INTC_INT_RISE_EDGE, 0 },
-        { AU1200_TOY_MATCH2_INT, INTC_INT_RISE_EDGE, 1 },
-        { AU1200_RTC_INT, INTC_INT_RISE_EDGE, 0 },
-        { AU1200_RTC_MATCH0_INT, INTC_INT_RISE_EDGE, 0 },
-        { AU1200_RTC_MATCH1_INT, INTC_INT_RISE_EDGE, 0 },
-        { AU1200_RTC_MATCH2_INT, INTC_INT_RISE_EDGE, 0 },
+        { AU1000_TOY_INT, INTC_INT_RISE_EDGE, 0 },
+        { AU1000_TOY_MATCH0_INT, INTC_INT_RISE_EDGE, 0 },
+        { AU1000_TOY_MATCH1_INT, INTC_INT_RISE_EDGE, 0 },
+        { AU1000_TOY_MATCH2_INT, INTC_INT_RISE_EDGE, 1 },
+        { AU1000_RTC_INT, INTC_INT_RISE_EDGE, 0 },
+        { AU1000_RTC_MATCH0_INT, INTC_INT_RISE_EDGE, 0 },
+        { AU1000_RTC_MATCH1_INT, INTC_INT_RISE_EDGE, 0 },
+        { AU1000_RTC_MATCH2_INT, INTC_INT_RISE_EDGE, 0 },
         { AU1200_NAND_INT, INTC_INT_RISE_EDGE, 0},
         { AU1200_USB_INT, INTC_INT_HIGH_LEVEL, 0 },
         { AU1200_LCD_INT, INTC_INT_HIGH_LEVEL, 0},
diff --git a/arch/mips/au1000/common/cputable.c b/arch/mips/au1000/common/cputable.c
index f5521dfccfd6..4dbde82c8215 100644
--- a/arch/mips/au1000/common/cputable.c
+++ b/arch/mips/au1000/common/cputable.c
@@ -37,7 +37,8 @@ struct cpu_spec	cpu_specs[] = {
     { 0xffffffff, 0x02030203, "Au1100 BD", 0, 1 },
     { 0xffffffff, 0x02030204, "Au1100 BE", 0, 1 },
     { 0xffffffff, 0x03030200, "Au1550 AA", 0, 1 },
-    { 0xffffffff, 0x04030200, "Au1200 AA", 0, 1 },
+    { 0xffffffff, 0x04030200, "Au1200 AB", 0, 0 },
+    { 0xffffffff, 0x04030201, "Au1200 AC", 0, 1 },
     { 0x00000000, 0x00000000, "Unknown Au1xxx", 1, 0 },
 };
 
diff --git a/arch/mips/au1000/common/dbdma.c b/arch/mips/au1000/common/dbdma.c
index adfc3172aace..cf10dc246f82 100644
--- a/arch/mips/au1000/common/dbdma.c
+++ b/arch/mips/au1000/common/dbdma.c
@@ -29,6 +29,7 @@
  *  675 Mass Ave, Cambridge, MA 02139, USA.
  *
  */
+
 #include <linux/config.h>
 #include <linux/kernel.h>
 #include <linux/errno.h>
@@ -42,6 +43,8 @@
 #include <asm/mach-au1x00/au1xxx_dbdma.h>
 #include <asm/system.h>
 
+/* #include <linux/module.h> */
+
 #if defined(CONFIG_SOC_AU1550) || defined(CONFIG_SOC_AU1200)
 
 /*
@@ -55,43 +58,16 @@
  * functions.  The drivers allocate the data buffers and assign them
  * to the descriptors.
  */
-static DEFINE_SPINLOCK(au1xxx_dbdma_spin_lock);
+static spinlock_t au1xxx_dbdma_spin_lock = SPIN_LOCK_UNLOCKED;
 
 /* I couldn't find a macro that did this......
 */
 #define ALIGN_ADDR(x, a)        ((((u32)(x)) + (a-1)) & ~(a-1))
 
-static volatile dbdma_global_t *dbdma_gptr = (dbdma_global_t *)DDMA_GLOBAL_BASE;
-static int dbdma_initialized;
+static dbdma_global_t *dbdma_gptr = (dbdma_global_t *)DDMA_GLOBAL_BASE;
+static int dbdma_initialized=0;
 static void au1xxx_dbdma_init(void);
 
-typedef struct dbdma_device_table {
-        u32             dev_id;
-        u32             dev_flags;
-        u32             dev_tsize;
-        u32             dev_devwidth;
-        u32             dev_physaddr;           /* If FIFO */
-        u32             dev_intlevel;
-        u32             dev_intpolarity;
-} dbdev_tab_t;
-
-typedef struct dbdma_chan_config {
-        u32                     chan_flags;
-        u32                     chan_index;
-        dbdev_tab_t             *chan_src;
-        dbdev_tab_t             *chan_dest;
-        au1x_dma_chan_t         *chan_ptr;
-        au1x_ddma_desc_t        *chan_desc_base;
-        au1x_ddma_desc_t        *get_ptr, *put_ptr, *cur_ptr;
-        void                    *chan_callparam;
-        void (*chan_callback)(int, void *, struct pt_regs *);
-} chan_tab_t;
-
-#define DEV_FLAGS_INUSE         (1 << 0)
-#define DEV_FLAGS_ANYUSE        (1 << 1)
-#define DEV_FLAGS_OUT           (1 << 2)
-#define DEV_FLAGS_IN            (1 << 3)
-
 static dbdev_tab_t dbdev_tab[] = {
 #ifdef CONFIG_SOC_AU1550
         /* UARTS */
@@ -157,13 +133,13 @@ static dbdev_tab_t dbdev_tab[] = {
         { DSCR_CMD0_MAE_BOTH, DEV_FLAGS_ANYUSE, 0, 0, 0x00000000, 0, 0 },
         { DSCR_CMD0_LCD, DEV_FLAGS_ANYUSE, 0, 0, 0x00000000, 0, 0 },
 
-        { DSCR_CMD0_SDMS_TX0, DEV_FLAGS_OUT, 0, 0, 0x00000000, 0, 0 },
-        { DSCR_CMD0_SDMS_RX0, DEV_FLAGS_IN, 0, 0, 0x00000000, 0, 0 },
-        { DSCR_CMD0_SDMS_TX1, DEV_FLAGS_OUT, 0, 0, 0x00000000, 0, 0 },
-        { DSCR_CMD0_SDMS_RX1, DEV_FLAGS_IN, 0, 0, 0x00000000, 0, 0 },
+        { DSCR_CMD0_SDMS_TX0, DEV_FLAGS_OUT, 4, 8, 0x10600000, 0, 0 },
+        { DSCR_CMD0_SDMS_RX0, DEV_FLAGS_IN, 4, 8, 0x10600004, 0, 0 },
+        { DSCR_CMD0_SDMS_TX1, DEV_FLAGS_OUT, 4, 8, 0x10680000, 0, 0 },
+        { DSCR_CMD0_SDMS_RX1, DEV_FLAGS_IN, 4, 8, 0x10680004, 0, 0 },
 
-        { DSCR_CMD0_AES_TX, DEV_FLAGS_OUT, 0, 0, 0x00000000, 0, 0 },
-        { DSCR_CMD0_AES_RX, DEV_FLAGS_IN, 0, 0, 0x00000000, 0, 0 },
+        { DSCR_CMD0_AES_RX, DEV_FLAGS_IN , 4, 32, 0x10300008, 0, 0 },
+        { DSCR_CMD0_AES_TX, DEV_FLAGS_OUT, 4, 32, 0x10300004, 0, 0 },
 
         { DSCR_CMD0_PSC0_TX, DEV_FLAGS_OUT, 0, 0, 0x11a0001c, 0, 0 },
         { DSCR_CMD0_PSC0_RX, DEV_FLAGS_IN, 0, 0, 0x11a0001c, 0, 0 },
@@ -173,9 +149,9 @@ static dbdev_tab_t dbdev_tab[] = {
         { DSCR_CMD0_PSC1_RX, DEV_FLAGS_IN, 0, 0, 0x11b0001c, 0, 0 },
         { DSCR_CMD0_PSC1_SYNC, DEV_FLAGS_ANYUSE, 0, 0, 0x00000000, 0, 0 },
 
-        { DSCR_CMD0_CIM_RXA, DEV_FLAGS_IN, 0, 0, 0x00000000, 0, 0 },
-        { DSCR_CMD0_CIM_RXB, DEV_FLAGS_IN, 0, 0, 0x00000000, 0, 0 },
-        { DSCR_CMD0_CIM_RXC, DEV_FLAGS_IN, 0, 0, 0x00000000, 0, 0 },
+        { DSCR_CMD0_CIM_RXA, DEV_FLAGS_IN, 0, 32, 0x14004020, 0, 0 },
+        { DSCR_CMD0_CIM_RXB, DEV_FLAGS_IN, 0, 32, 0x14004040, 0, 0 },
+        { DSCR_CMD0_CIM_RXC, DEV_FLAGS_IN, 0, 32, 0x14004060, 0, 0 },
         { DSCR_CMD0_CIM_SYNC, DEV_FLAGS_ANYUSE, 0, 0, 0x00000000, 0, 0 },
 
         { DSCR_CMD0_NAND_FLASH, DEV_FLAGS_IN, 0, 0, 0x00000000, 0, 0 },
@@ -184,6 +160,24 @@ static dbdev_tab_t dbdev_tab[] = {
 
         { DSCR_CMD0_THROTTLE, DEV_FLAGS_ANYUSE, 0, 0, 0x00000000, 0, 0 },
         { DSCR_CMD0_ALWAYS, DEV_FLAGS_ANYUSE, 0, 0, 0x00000000, 0, 0 },
+
+        /* Provide 16 user definable device types */
+        { 0, 0, 0, 0, 0, 0, 0 },
+        { 0, 0, 0, 0, 0, 0, 0 },
+        { 0, 0, 0, 0, 0, 0, 0 },
+        { 0, 0, 0, 0, 0, 0, 0 },
+        { 0, 0, 0, 0, 0, 0, 0 },
+        { 0, 0, 0, 0, 0, 0, 0 },
+        { 0, 0, 0, 0, 0, 0, 0 },
+        { 0, 0, 0, 0, 0, 0, 0 },
+        { 0, 0, 0, 0, 0, 0, 0 },
+        { 0, 0, 0, 0, 0, 0, 0 },
+        { 0, 0, 0, 0, 0, 0, 0 },
+        { 0, 0, 0, 0, 0, 0, 0 },
+        { 0, 0, 0, 0, 0, 0, 0 },
+        { 0, 0, 0, 0, 0, 0, 0 },
+        { 0, 0, 0, 0, 0, 0, 0 },
+        { 0, 0, 0, 0, 0, 0, 0 },
 };
 
 #define DBDEV_TAB_SIZE (sizeof(dbdev_tab) / sizeof(dbdev_tab_t))
@@ -203,6 +197,30 @@ find_dbdev_id (u32 id)
         return NULL;
 }
 
+u32
+au1xxx_ddma_add_device(dbdev_tab_t *dev)
+{
+        u32 ret = 0;
+        dbdev_tab_t *p=NULL;
+        static u16 new_id=0x1000;
+
+        p = find_dbdev_id(0);
+        if ( NULL != p )
+        {
+                memcpy(p, dev, sizeof(dbdev_tab_t));
+                p->dev_id = DSCR_DEV2CUSTOM_ID(new_id,dev->dev_id);
+                ret = p->dev_id;
+                new_id++;
+#if 0
+                printk("add_device: id:%x flags:%x padd:%x\n",
+                                p->dev_id, p->dev_flags, p->dev_physaddr );
+#endif
+        }
+
+        return ret;
+}
+EXPORT_SYMBOL(au1xxx_ddma_add_device);
+
 /* Allocate a channel and return a non-zero descriptor if successful.
 */
 u32
@@ -215,7 +233,7 @@ au1xxx_dbdma_chan_alloc(u32 srcid, u32 destid,
         int             i;
         dbdev_tab_t     *stp, *dtp;
         chan_tab_t      *ctp;
-        volatile au1x_dma_chan_t *cp;
+        au1x_dma_chan_t *cp;
 
         /* We do the intialization on the first channel allocation.
          * We have to wait because of the interrupt handler initialization
@@ -225,9 +243,6 @@ au1xxx_dbdma_chan_alloc(u32 srcid, u32 destid,
                 au1xxx_dbdma_init();
         dbdma_initialized = 1;
 
-        if ((srcid > DSCR_NDEV_IDS) || (destid > DSCR_NDEV_IDS))
-                return 0;
-
         if ((stp = find_dbdev_id(srcid)) == NULL) return 0;
         if ((dtp = find_dbdev_id(destid)) == NULL) return 0;
 
@@ -269,9 +284,9 @@ au1xxx_dbdma_chan_alloc(u32 srcid, u32 destid,
                                 /* If kmalloc fails, it is caught below same
                                  * as a channel not available.
                                  */
-                                ctp = kmalloc(sizeof(chan_tab_t), GFP_KERNEL);
+                                ctp = (chan_tab_t *)
+                                        kmalloc(sizeof(chan_tab_t), GFP_KERNEL);
                                 chan_tab_ptr[i] = ctp;
-                                ctp->chan_index = chan = i;
                                 break;
                         }
                 }
@@ -279,10 +294,11 @@ au1xxx_dbdma_chan_alloc(u32 srcid, u32 destid,
 
                 if (ctp != NULL) {
                         memset(ctp, 0, sizeof(chan_tab_t));
+                        ctp->chan_index = chan = i;
                         dcp = DDMA_CHANNEL_BASE;
                         dcp += (0x0100 * chan);
                         ctp->chan_ptr = (au1x_dma_chan_t *)dcp;
-                        cp = (volatile au1x_dma_chan_t *)dcp;
+                        cp = (au1x_dma_chan_t *)dcp;
                         ctp->chan_src = stp;
                         ctp->chan_dest = dtp;
                         ctp->chan_callback = callback;
@@ -299,6 +315,9 @@ au1xxx_dbdma_chan_alloc(u32 srcid, u32 destid,
                                 i |= DDMA_CFG_DED;
                         if (dtp->dev_intpolarity)
                                 i |= DDMA_CFG_DP;
+                        if ((stp->dev_flags & DEV_FLAGS_SYNC) ||
+                                (dtp->dev_flags & DEV_FLAGS_SYNC))
+                                        i |= DDMA_CFG_SYNC;
                         cp->ddma_cfg = i;
                         au_sync();
 
@@ -309,14 +328,14 @@ au1xxx_dbdma_chan_alloc(u32 srcid, u32 destid,
                         rv = (u32)(&chan_tab_ptr[chan]);
                 }
                 else {
-                        /* Release devices.
-                        */
+                        /* Release devices */
                         stp->dev_flags &= ~DEV_FLAGS_INUSE;
                         dtp->dev_flags &= ~DEV_FLAGS_INUSE;
                 }
         }
         return rv;
 }
+EXPORT_SYMBOL(au1xxx_dbdma_chan_alloc);
 
 /* Set the device width if source or destination is a FIFO.
  * Should be 8, 16, or 32 bits.
@@ -344,6 +363,7 @@ au1xxx_dbdma_set_devwidth(u32 chanid, int bits)
 
         return rv;
 }
+EXPORT_SYMBOL(au1xxx_dbdma_set_devwidth);
 
 /* Allocate a descriptor ring, initializing as much as possible.
 */
@@ -370,7 +390,8 @@ au1xxx_dbdma_ring_alloc(u32 chanid, int entries)
          * and if we try that first we are likely to not waste larger
          * slabs of memory.
          */
-        desc_base = (u32)kmalloc(entries * sizeof(au1x_ddma_desc_t), GFP_KERNEL);
+        desc_base = (u32)kmalloc(entries * sizeof(au1x_ddma_desc_t),
+                        GFP_KERNEL|GFP_DMA);
         if (desc_base == 0)
                 return 0;
 
@@ -381,7 +402,7 @@ au1xxx_dbdma_ring_alloc(u32 chanid, int entries)
                 kfree((const void *)desc_base);
                 i = entries * sizeof(au1x_ddma_desc_t);
                 i += (sizeof(au1x_ddma_desc_t) - 1);
-                if ((desc_base = (u32)kmalloc(i, GFP_KERNEL)) == 0)
+                if ((desc_base = (u32)kmalloc(i, GFP_KERNEL|GFP_DMA)) == 0)
                         return 0;
 
                 desc_base = ALIGN_ADDR(desc_base, sizeof(au1x_ddma_desc_t));
@@ -461,9 +482,14 @@ au1xxx_dbdma_ring_alloc(u32 chanid, int entries)
         /* If source input is fifo, set static address.
         */
         if (stp->dev_flags & DEV_FLAGS_IN) {
-                src0 = stp->dev_physaddr;
+                if ( stp->dev_flags & DEV_FLAGS_BURSTABLE )
+                        src1 |= DSCR_SRC1_SAM(DSCR_xAM_BURST);
+                else
                 src1 |= DSCR_SRC1_SAM(DSCR_xAM_STATIC);
+
         }
+        if (stp->dev_physaddr)
+                src0 = stp->dev_physaddr;
 
         /* Set up dest1.  For now, assume no stride and increment.
          * A channel attribute update can change this later.
@@ -487,10 +513,18 @@ au1xxx_dbdma_ring_alloc(u32 chanid, int entries)
         /* If destination output is fifo, set static address.
         */
         if (dtp->dev_flags & DEV_FLAGS_OUT) {
-                dest0 = dtp->dev_physaddr;
+                if ( dtp->dev_flags & DEV_FLAGS_BURSTABLE )
+                        dest1 |= DSCR_DEST1_DAM(DSCR_xAM_BURST);
+                                else
                 dest1 |= DSCR_DEST1_DAM(DSCR_xAM_STATIC);
         }
+        if (dtp->dev_physaddr)
+                dest0 = dtp->dev_physaddr;
 
+#if 0
+                printk("did:%x sid:%x cmd0:%x cmd1:%x source0:%x source1:%x dest0:%x dest1:%x\n",
+                        dtp->dev_id, stp->dev_id, cmd0, cmd1, src0, src1, dest0, dest1 );
+#endif
         for (i=0; i<entries; i++) {
                 dp->dscr_cmd0 = cmd0;
                 dp->dscr_cmd1 = cmd1;
@@ -499,6 +533,7 @@ au1xxx_dbdma_ring_alloc(u32 chanid, int entries)
                 dp->dscr_dest0 = dest0;
                 dp->dscr_dest1 = dest1;
                 dp->dscr_stat = 0;
+                                dp->sw_context = dp->sw_status = 0;
                 dp->dscr_nxtptr = DSCR_NXTPTR(virt_to_phys(dp + 1));
                 dp++;
         }
@@ -511,13 +546,14 @@ au1xxx_dbdma_ring_alloc(u32 chanid, int entries)
 
         return (u32)(ctp->chan_desc_base);
 }
+EXPORT_SYMBOL(au1xxx_dbdma_ring_alloc);
 
 /* Put a source buffer into the DMA ring.
  * This updates the source pointer and byte count.  Normally used
  * for memory to fifo transfers.
  */
 u32
-au1xxx_dbdma_put_source(u32 chanid, void *buf, int nbytes)
+_au1xxx_dbdma_put_source(u32 chanid, void *buf, int nbytes, u32 flags)
 {
         chan_tab_t              *ctp;
         au1x_ddma_desc_t        *dp;
@@ -544,24 +580,40 @@ au1xxx_dbdma_put_source(u32 chanid, void *buf, int nbytes)
         */
         dp->dscr_source0 = virt_to_phys(buf);
         dp->dscr_cmd1 = nbytes;
-        dp->dscr_cmd0 |= DSCR_CMD0_V;   /* Let it rip */
-        ctp->chan_ptr->ddma_dbell = 0xffffffff; /* Make it go */
-
+        /* Check flags  */
+        if (flags & DDMA_FLAGS_IE)
+                dp->dscr_cmd0 |= DSCR_CMD0_IE;
+        if (flags & DDMA_FLAGS_NOIE)
+                dp->dscr_cmd0 &= ~DSCR_CMD0_IE;
         /* Get next descriptor pointer.
         */
         ctp->put_ptr = phys_to_virt(DSCR_GET_NXTPTR(dp->dscr_nxtptr));
 
+        /*
+         * There is an errata on the Au1200/Au1550 parts that could result
+         * in "stale" data being DMA'd. It has to do with the snoop logic on
+         * the dache eviction buffer.  NONCOHERENT_IO is on by default for
+         * these parts. If it is fixedin the future, these dma_cache_inv will
+         * just be nothing more than empty macros. See io.h.
+         * */
+        dma_cache_wback_inv(buf,nbytes);
+        dp->dscr_cmd0 |= DSCR_CMD0_V;        /* Let it rip */
+        au_sync();
+        dma_cache_wback_inv(dp, sizeof(dp));
+        ctp->chan_ptr->ddma_dbell = 0;
+
         /* return something not zero.
         */
         return nbytes;
 }
+EXPORT_SYMBOL(_au1xxx_dbdma_put_source);
 
 /* Put a destination buffer into the DMA ring.
  * This updates the destination pointer and byte count.  Normally used
  * to place an empty buffer into the ring for fifo to memory transfers.
  */
 u32
-au1xxx_dbdma_put_dest(u32 chanid, void *buf, int nbytes)
+_au1xxx_dbdma_put_dest(u32 chanid, void *buf, int nbytes, u32 flags)
 {
         chan_tab_t              *ctp;
         au1x_ddma_desc_t        *dp;
@@ -583,11 +635,33 @@ au1xxx_dbdma_put_dest(u32 chanid, void *buf, int nbytes)
         if (dp->dscr_cmd0 & DSCR_CMD0_V)
                 return 0;
 
-        /* Load up buffer address and byte count.
-        */
+        /* Load up buffer address and byte count */
+
+        /* Check flags  */
+        if (flags & DDMA_FLAGS_IE)
+                dp->dscr_cmd0 |= DSCR_CMD0_IE;
+        if (flags & DDMA_FLAGS_NOIE)
+                dp->dscr_cmd0 &= ~DSCR_CMD0_IE;
+
         dp->dscr_dest0 = virt_to_phys(buf);
         dp->dscr_cmd1 = nbytes;
+#if 0
+        printk("cmd0:%x cmd1:%x source0:%x source1:%x dest0:%x dest1:%x\n",
+                        dp->dscr_cmd0, dp->dscr_cmd1, dp->dscr_source0,
+                        dp->dscr_source1, dp->dscr_dest0, dp->dscr_dest1 );
+#endif
+        /*
+         * There is an errata on the Au1200/Au1550 parts that could result in
+         * "stale" data being DMA'd. It has to do with the snoop logic on the
+         * dache eviction buffer. NONCOHERENT_IO is on by default for these
+         * parts. If it is fixedin the future, these dma_cache_inv will just
+         * be nothing more than empty macros. See io.h.
+         * */
+        dma_cache_inv(buf,nbytes);
         dp->dscr_cmd0 |= DSCR_CMD0_V;   /* Let it rip */
+        au_sync();
+        dma_cache_wback_inv(dp, sizeof(dp));
+        ctp->chan_ptr->ddma_dbell = 0;
 
         /* Get next descriptor pointer.
         */
@@ -597,6 +671,7 @@ au1xxx_dbdma_put_dest(u32 chanid, void *buf, int nbytes)
         */
         return nbytes;
 }
+EXPORT_SYMBOL(_au1xxx_dbdma_put_dest);
 
 /* Get a destination buffer into the DMA ring.
  * Normally used to get a full buffer from the ring during fifo
@@ -646,7 +721,7 @@ void
 au1xxx_dbdma_stop(u32 chanid)
 {
         chan_tab_t      *ctp;
-        volatile au1x_dma_chan_t *cp;
+        au1x_dma_chan_t *cp;
         int halt_timeout = 0;
 
         ctp = *((chan_tab_t **)chanid);
@@ -666,6 +741,7 @@ au1xxx_dbdma_stop(u32 chanid)
         cp->ddma_stat |= (DDMA_STAT_DB | DDMA_STAT_V);
         au_sync();
 }
+EXPORT_SYMBOL(au1xxx_dbdma_stop);
 
 /* Start using the current descriptor pointer.  If the dbdma encounters
  * a not valid descriptor, it will stop.  In this case, we can just
@@ -675,17 +751,17 @@ void
 au1xxx_dbdma_start(u32 chanid)
 {
         chan_tab_t      *ctp;
-        volatile au1x_dma_chan_t *cp;
+        au1x_dma_chan_t *cp;
 
         ctp = *((chan_tab_t **)chanid);
-
         cp = ctp->chan_ptr;
         cp->ddma_desptr = virt_to_phys(ctp->cur_ptr);
         cp->ddma_cfg |= DDMA_CFG_EN;    /* Enable channel */
         au_sync();
-        cp->ddma_dbell = 0xffffffff;    /* Make it go */
+        cp->ddma_dbell = 0;
         au_sync();
 }
+EXPORT_SYMBOL(au1xxx_dbdma_start);
 
 void
 au1xxx_dbdma_reset(u32 chanid)
@@ -704,15 +780,21 @@ au1xxx_dbdma_reset(u32 chanid)
 
         do {
                 dp->dscr_cmd0 &= ~DSCR_CMD0_V;
+                /* reset our SW status -- this is used to determine
+                 * if a descriptor is in use by upper level SW. Since
+                 * posting can reset 'V' bit.
+                 */
+                dp->sw_status = 0;
                 dp = phys_to_virt(DSCR_GET_NXTPTR(dp->dscr_nxtptr));
         } while (dp != ctp->chan_desc_base);
 }
+EXPORT_SYMBOL(au1xxx_dbdma_reset);
 
 u32
 au1xxx_get_dma_residue(u32 chanid)
 {
         chan_tab_t      *ctp;
-        volatile au1x_dma_chan_t *cp;
+        au1x_dma_chan_t *cp;
         u32             rv;
 
         ctp = *((chan_tab_t **)chanid);
@@ -747,15 +829,16 @@ au1xxx_dbdma_chan_free(u32 chanid)
 
         kfree(ctp);
 }
+EXPORT_SYMBOL(au1xxx_dbdma_chan_free);
 
-static irqreturn_t
+static void
 dbdma_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 {
-        u32     intstat;
+        u32                                     intstat, flags;
         u32     chan_index;
         chan_tab_t              *ctp;
         au1x_ddma_desc_t        *dp;
-        volatile au1x_dma_chan_t *cp;
+        au1x_dma_chan_t *cp;
 
         intstat = dbdma_gptr->ddma_intstat;
         au_sync();
@@ -774,19 +857,26 @@ dbdma_interrupt(int irq, void *dev_id, struct pt_regs *regs)
                 (ctp->chan_callback)(irq, ctp->chan_callparam, regs);
 
         ctp->cur_ptr = phys_to_virt(DSCR_GET_NXTPTR(dp->dscr_nxtptr));
-
-        return IRQ_HANDLED;
 }
 
-static void
-au1xxx_dbdma_init(void)
+static void au1xxx_dbdma_init(void)
 {
+        int irq_nr;
+
         dbdma_gptr->ddma_config = 0;
         dbdma_gptr->ddma_throttle = 0;
         dbdma_gptr->ddma_inten = 0xffff;
         au_sync();
 
-        if (request_irq(AU1550_DDMA_INT, dbdma_interrupt, SA_INTERRUPT,
+#if defined(CONFIG_SOC_AU1550)
+        irq_nr = AU1550_DDMA_INT;
+#elif defined(CONFIG_SOC_AU1200)
+        irq_nr = AU1200_DDMA_INT;
+#else
+        #error Unknown Au1x00 SOC
+#endif
+
+        if (request_irq(irq_nr, dbdma_interrupt, SA_INTERRUPT,
                         "Au1xxx dbdma", (void *)dbdma_gptr))
                 printk("Can't get 1550 dbdma irq");
 }
@@ -797,7 +887,8 @@ au1xxx_dbdma_dump(u32 chanid)
         chan_tab_t              *ctp;
         au1x_ddma_desc_t        *dp;
         dbdev_tab_t             *stp, *dtp;
-        volatile au1x_dma_chan_t *cp;
+        au1x_dma_chan_t *cp;
+                u32                     i = 0;
 
         ctp = *((chan_tab_t **)chanid);
         stp = ctp->chan_src;
@@ -822,15 +913,64 @@ au1xxx_dbdma_dump(u32 chanid)
         dp = ctp->chan_desc_base;
 
         do {
-                printk("dp %08x, cmd0 %08x, cmd1 %08x\n",
-                        (u32)dp, dp->dscr_cmd0, dp->dscr_cmd1);
-                printk("src0 %08x, src1 %08x, dest0 %08x\n",
-                        dp->dscr_source0, dp->dscr_source1, dp->dscr_dest0);
-                printk("dest1 %08x, stat %08x, nxtptr %08x\n",
-                        dp->dscr_dest1, dp->dscr_stat, dp->dscr_nxtptr);
+                printk("Dp[%d]= %08x, cmd0 %08x, cmd1 %08x\n",
+                        i++, (u32)dp, dp->dscr_cmd0, dp->dscr_cmd1);
+                printk("src0 %08x, src1 %08x, dest0 %08x, dest1 %08x\n",
+                        dp->dscr_source0, dp->dscr_source1, dp->dscr_dest0, dp->dscr_dest1);
+                printk("stat %08x, nxtptr %08x\n",
+                        dp->dscr_stat, dp->dscr_nxtptr);
                 dp = phys_to_virt(DSCR_GET_NXTPTR(dp->dscr_nxtptr));
         } while (dp != ctp->chan_desc_base);
 }
 
+/* Put a descriptor into the DMA ring.
+ * This updates the source/destination pointers and byte count.
+ */
+u32
+au1xxx_dbdma_put_dscr(u32 chanid, au1x_ddma_desc_t *dscr )
+{
+        chan_tab_t *ctp;
+        au1x_ddma_desc_t *dp;
+        u32 nbytes=0;
+
+        /* I guess we could check this to be within the
+        * range of the table......
+        */
+        ctp = *((chan_tab_t **)chanid);
+
+        /* We should have multiple callers for a particular channel,
+        * an interrupt doesn't affect this pointer nor the descriptor,
+        * so no locking should be needed.
+        */
+        dp = ctp->put_ptr;
+
+        /* If the descriptor is valid, we are way ahead of the DMA
+        * engine, so just return an error condition.
+        */
+        if (dp->dscr_cmd0 & DSCR_CMD0_V)
+                return 0;
+
+        /* Load up buffer addresses and byte count.
+        */
+        dp->dscr_dest0 = dscr->dscr_dest0;
+        dp->dscr_source0 = dscr->dscr_source0;
+        dp->dscr_dest1 = dscr->dscr_dest1;
+        dp->dscr_source1 = dscr->dscr_source1;
+        dp->dscr_cmd1 = dscr->dscr_cmd1;
+        nbytes = dscr->dscr_cmd1;
+        /* Allow the caller to specifiy if an interrupt is generated */
+        dp->dscr_cmd0 &= ~DSCR_CMD0_IE;
+        dp->dscr_cmd0 |= dscr->dscr_cmd0 | DSCR_CMD0_V;
+        ctp->chan_ptr->ddma_dbell = 0;
+
+        /* Get next descriptor pointer.
+        */
+        ctp->put_ptr = phys_to_virt(DSCR_GET_NXTPTR(dp->dscr_nxtptr));
+
+        /* return something not zero.
+        */
+        return nbytes;
+}
+
 #endif /* defined(CONFIG_SOC_AU1550) || defined(CONFIG_SOC_AU1200) */
 
diff --git a/arch/mips/au1000/common/irq.c b/arch/mips/au1000/common/irq.c
index 0b912f739feb..ebf93bdbad14 100644
--- a/arch/mips/au1000/common/irq.c
+++ b/arch/mips/au1000/common/irq.c
@@ -488,7 +488,7 @@ void intc0_req0_irqdispatch(struct pt_regs *regs)
         intc0_req0 |= au_readl(IC0_REQ0INT);
 
         if (!intc0_req0) return;
-
+#ifdef AU1000_USB_DEV_REQ_INT
         /*
          * Because of the tight timing of SETUP token to reply
          * transactions, the USB devices-side packet complete
@@ -499,7 +499,7 @@ void intc0_req0_irqdispatch(struct pt_regs *regs)
                 do_IRQ(AU1000_USB_DEV_REQ_INT, regs);
                 return;
         }
-
+#endif
         irq = au_ffs(intc0_req0) - 1;
         intc0_req0 &= ~(1<<irq);
         do_IRQ(irq, regs);
diff --git a/arch/mips/au1000/common/usbdev.c b/arch/mips/au1000/common/usbdev.c
index 447a9a4612a8..0b21bed7ee55 100644
--- a/arch/mips/au1000/common/usbdev.c
+++ b/arch/mips/au1000/common/usbdev.c
@@ -1005,11 +1005,11 @@ process_ep0_receive (struct usb_dev* dev)
 #endif
                 dev->ep0_stage = SETUP_STAGE;
                 break;
-                }
+        }
 
         spin_unlock(&ep0->lock);
-                // we're done processing the packet, free it
-                kfree(pkt);
+        // we're done processing the packet, free it
+        kfree(pkt);
 }
 
 
@@ -1072,8 +1072,7 @@ dma_done_ep0_intr(int irq, void *dev_id, struct pt_regs *regs)
                         clear_dma_done1(ep0->indma);
 
                 pkt = send_packet_complete(ep0);
-                if (pkt)
-                        kfree(pkt);
+                kfree(pkt);
         }
 
         /*
@@ -1302,8 +1301,7 @@ usbdev_exit(void)
                 endpoint_flush(ep);
         }
 
-        if (usbdev.full_conf_desc)
-                kfree(usbdev.full_conf_desc);
+        kfree(usbdev.full_conf_desc);
 }
 
 int
diff --git a/arch/mips/au1000/pb1200/Makefile b/arch/mips/au1000/pb1200/Makefile
new file mode 100644
index 000000000000..22b673cf55af
--- /dev/null
+++ b/arch/mips/au1000/pb1200/Makefile
@@ -0,0 +1,5 @@
+#
+# Makefile for the Alchemy Semiconductor PB1200 board.
+#
+
+lib-y := init.o board_setup.o irqmap.o
diff --git a/arch/mips/au1000/pb1200/board_setup.c b/arch/mips/au1000/pb1200/board_setup.c
new file mode 100644
index 000000000000..209a07cb7321
--- /dev/null
+++ b/arch/mips/au1000/pb1200/board_setup.c
@@ -0,0 +1,187 @@
+/*
+ *
+ * BRIEF MODULE DESCRIPTION
+ *      Alchemy Pb1200/Db1200 board setup.
+ *
+ *  This program is free software; you can redistribute  it and/or modify it
+ *  under  the terms of  the GNU General  Public License as published by the
+ *  Free Software Foundation;  either version 2 of the  License, or (at your
+ *  option) any later version.
+ *
+ *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
+ *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
+ *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
+ *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
+ *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
+ *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *  You should have received a copy of the  GNU General Public License along
+ *  with this program; if not, write  to the Free Software Foundation, Inc.,
+ *  675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/ioport.h>
+#include <linux/mm.h>
+#include <linux/console.h>
+#include <linux/mc146818rtc.h>
+#include <linux/delay.h>
+
+#if defined(CONFIG_BLK_DEV_IDE_AU1XXX)
+#include <linux/ide.h>
+#endif
+
+#include <asm/cpu.h>
+#include <asm/bootinfo.h>
+#include <asm/irq.h>
+#include <asm/mipsregs.h>
+#include <asm/reboot.h>
+#include <asm/pgtable.h>
+#include <asm/mach-au1x00/au1000.h>
+#include <asm/mach-au1x00/au1xxx_dbdma.h>
+
+#ifdef CONFIG_MIPS_PB1200
+#include <asm/mach-pb1x00/pb1200.h>
+#endif
+
+#ifdef CONFIG_MIPS_DB1200
+#include <asm/mach-db1x00/db1200.h>
+#define PB1200_ETH_INT DB1200_ETH_INT
+#define PB1200_IDE_INT DB1200_IDE_INT
+#endif
+
+extern void _board_init_irq(void);
+extern void     (*board_init_irq)(void);
+
+#ifdef CONFIG_BLK_DEV_IDE_AU1XXX
+extern struct ide_ops *ide_ops;
+extern struct ide_ops au1xxx_ide_ops;
+extern u32 au1xxx_ide_virtbase;
+extern u64 au1xxx_ide_physbase;
+extern int au1xxx_ide_irq;
+
+u32 led_base_addr;
+/* Ddma */
+chan_tab_t *ide_read_ch, *ide_write_ch;
+u32 au1xxx_ide_ddma_enable = 0, switch4ddma = 1; // PIO+ddma
+
+dbdev_tab_t new_dbdev_tab_element = { DSCR_CMD0_THROTTLE, DEV_FLAGS_ANYUSE, 0, 0, 0x00000000, 0, 0 };
+#endif /* end CONFIG_BLK_DEV_IDE_AU1XXX */
+
+void board_reset (void)
+{
+        bcsr->resets = 0;
+}
+
+void __init board_setup(void)
+{
+        char *argptr = NULL;
+        u32 pin_func;
+
+#if 0
+        /* Enable PSC1 SYNC for AC97.  Normaly done in audio driver,
+         * but it is board specific code, so put it here.
+         */
+        pin_func = au_readl(SYS_PINFUNC);
+        au_sync();
+        pin_func |= SYS_PF_MUST_BE_SET | SYS_PF_PSC1_S1;
+        au_writel(pin_func, SYS_PINFUNC);
+
+        au_writel(0, (u32)bcsr|0x10); /* turn off pcmcia power */
+        au_sync();
+#endif
+
+#if defined( CONFIG_I2C_ALGO_AU1550 )
+        {
+        u32 freq0, clksrc;
+
+        /* Select SMBUS in CPLD */
+        bcsr->resets &= ~(BCSR_RESETS_PCS0MUX);
+
+        pin_func = au_readl(SYS_PINFUNC);
+        au_sync();
+        pin_func &= ~(3<<17 | 1<<4);
+        /* Set GPIOs correctly */
+        pin_func |= 2<<17;
+        au_writel(pin_func, SYS_PINFUNC);
+        au_sync();
+
+        /* The i2c driver depends on 50Mhz clock */
+        freq0 = au_readl(SYS_FREQCTRL0);
+        au_sync();
+        freq0 &= ~(SYS_FC_FRDIV1_MASK | SYS_FC_FS1 | SYS_FC_FE1);
+        freq0 |= (3<<SYS_FC_FRDIV1_BIT);
+        /* 396Mhz / (3+1)*2 == 49.5Mhz */
+        au_writel(freq0, SYS_FREQCTRL0);
+        au_sync();
+        freq0 |= SYS_FC_FE1;
+        au_writel(freq0, SYS_FREQCTRL0);
+        au_sync();
+
+        clksrc = au_readl(SYS_CLKSRC);
+        au_sync();
+        clksrc &= ~0x01f00000;
+        /* bit 22 is EXTCLK0 for PSC0 */
+        clksrc |= (0x3 << 22);
+        au_writel(clksrc, SYS_CLKSRC);
+        au_sync();
+        }
+#endif
+
+#ifdef CONFIG_FB_AU1200
+        argptr = prom_getcmdline();
+#ifdef CONFIG_MIPS_PB1200
+        strcat(argptr, " video=au1200fb:panel:s11");
+#endif
+#ifdef CONFIG_MIPS_DB1200
+        strcat(argptr, " video=au1200fb:panel:s7");
+#endif
+#endif
+
+#if defined(CONFIG_BLK_DEV_IDE_AU1XXX)
+        /*
+         * Iniz IDE parameters
+         */
+        ide_ops = &au1xxx_ide_ops;
+        au1xxx_ide_irq = PB1200_IDE_INT;
+        au1xxx_ide_physbase = AU1XXX_ATA_PHYS_ADDR;
+        au1xxx_ide_virtbase = KSEG1ADDR(AU1XXX_ATA_PHYS_ADDR);
+        /*
+         * change PIO or PIO+Ddma
+         * check the GPIO-5 pin condition. pb1200:s18_dot */
+        switch4ddma = (au_readl(SYS_PINSTATERD) & (1 << 5)) ? 1 : 0;
+#endif
+
+        /* The Pb1200 development board uses external MUX for PSC0 to
+        support SMB/SPI. bcsr->resets bit 12: 0=SMB 1=SPI
+        */
+#if defined(CONFIG_AU1550_PSC_SPI) && defined(CONFIG_I2C_ALGO_AU1550)
+        #error I2C and SPI are mutually exclusive. Both are physically connected to PSC0.\
+                        Refer to Pb1200/Db1200 documentation.
+#elif defined( CONFIG_AU1550_PSC_SPI )
+        bcsr->resets |= BCSR_RESETS_PCS0MUX;
+#elif defined( CONFIG_I2C_ALGO_AU1550 )
+        bcsr->resets &= (~BCSR_RESETS_PCS0MUX);
+#endif
+        au_sync();
+
+#ifdef CONFIG_MIPS_PB1200
+        printk("AMD Alchemy Pb1200 Board\n");
+#endif
+#ifdef CONFIG_MIPS_DB1200
+        printk("AMD Alchemy Db1200 Board\n");
+#endif
+#if 0
+        /* Setup Pb1200 External Interrupt Controller */
+        {
+                extern void (*board_init_irq)(void);
+                extern void _board_init_irq(void);
+                board_init_irq = _board_init_irq;
+        }
+#endif
+}
diff --git a/arch/mips/au1000/pb1200/init.c b/arch/mips/au1000/pb1200/init.c
new file mode 100644
index 000000000000..27f09e374e15
--- /dev/null
+++ b/arch/mips/au1000/pb1200/init.c
@@ -0,0 +1,69 @@
+/*
+ *
+ * BRIEF MODULE DESCRIPTION
+ *      PB1200 board setup
+ *
+ * Copyright 2001 MontaVista Software Inc.
+ * Author: MontaVista Software, Inc.
+ *              ppopov@mvista.com or source@mvista.com
+ *
+ *  This program is free software; you can redistribute  it and/or modify it
+ *  under  the terms of  the GNU General  Public License as published by the
+ *  Free Software Foundation;  either version 2 of the  License, or (at your
+ *  option) any later version.
+ *
+ *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
+ *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
+ *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
+ *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
+ *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
+ *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *  You should have received a copy of the  GNU General Public License along
+ *  with this program; if not, write  to the Free Software Foundation, Inc.,
+ *  675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#include <linux/init.h>
+#include <linux/mm.h>
+#include <linux/sched.h>
+#include <linux/bootmem.h>
+#include <asm/addrspace.h>
+#include <asm/bootinfo.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+
+int prom_argc;
+char **prom_argv, **prom_envp;
+extern void  __init prom_init_cmdline(void);
+extern char *prom_getenv(char *envname);
+
+const char *get_system_type(void)
+{
+        return "Alchemy Pb1200";
+}
+
+void __init prom_init(void)
+{
+        unsigned char *memsize_str;
+        unsigned long memsize;
+
+        prom_argc = (int) fw_arg0;
+        prom_argv = (char **) fw_arg1;
+        prom_envp = (char **) fw_arg2;
+
+        mips_machgroup = MACH_GROUP_ALCHEMY;
+        mips_machtype = MACH_PB1200;
+
+        prom_init_cmdline();
+        memsize_str = prom_getenv("memsize");
+        if (!memsize_str) {
+                memsize = 0x08000000;
+        } else {
+                memsize = simple_strtol(memsize_str, NULL, 0);
+        }
+        add_memory_region(0, memsize, BOOT_MEM_RAM);
+}
diff --git a/arch/mips/au1000/pb1200/irqmap.c b/arch/mips/au1000/pb1200/irqmap.c
new file mode 100644
index 000000000000..2ec64e78aa01
--- /dev/null
+++ b/arch/mips/au1000/pb1200/irqmap.c
@@ -0,0 +1,180 @@
+/*
+ * BRIEF MODULE DESCRIPTION
+ *      Au1xxx irq map table
+ *
+ *  This program is free software; you can redistribute  it and/or modify it
+ *  under  the terms of  the GNU General  Public License as published by the
+ *  Free Software Foundation;  either version 2 of the  License, or (at your
+ *  option) any later version.
+ *
+ *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
+ *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
+ *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
+ *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
+ *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
+ *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *  You should have received a copy of the  GNU General Public License along
+ *  with this program; if not, write  to the Free Software Foundation, Inc.,
+ *  675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <linux/kernel_stat.h>
+#include <linux/module.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/timex.h>
+#include <linux/slab.h>
+#include <linux/random.h>
+#include <linux/delay.h>
+
+#include <asm/bitops.h>
+#include <asm/bootinfo.h>
+#include <asm/io.h>
+#include <asm/mipsregs.h>
+#include <asm/system.h>
+#include <asm/mach-au1x00/au1000.h>
+
+#ifdef CONFIG_MIPS_PB1200
+#include <asm/mach-pb1x00/pb1200.h>
+#endif
+
+#ifdef CONFIG_MIPS_DB1200
+#include <asm/mach-db1x00/db1200.h>
+#define PB1200_INT_BEGIN DB1200_INT_BEGIN
+#define PB1200_INT_END DB1200_INT_END
+#endif
+
+au1xxx_irq_map_t au1xxx_irq_map[] = {
+        { AU1000_GPIO_7, INTC_INT_LOW_LEVEL, 0 }, // This is exteranl interrupt cascade
+};
+
+int au1xxx_nr_irqs = sizeof(au1xxx_irq_map)/sizeof(au1xxx_irq_map_t);
+
+/*
+ *      Support for External interrupts on the PbAu1200 Development platform.
+ */
+static volatile int pb1200_cascade_en=0;
+
+void pb1200_cascade_handler( int irq, void *dev_id, struct pt_regs *regs)
+{
+        unsigned short bisr = bcsr->int_status;
+        int extirq_nr = 0;
+
+        /* Clear all the edge interrupts. This has no effect on level */
+        bcsr->int_status = bisr;
+        for( ; bisr; bisr &= (bisr-1) )
+        {
+                extirq_nr = (PB1200_INT_BEGIN-1) + au_ffs(bisr);
+                /* Ack and dispatch IRQ */
+                do_IRQ(extirq_nr,regs);
+        }
+}
+
+inline void pb1200_enable_irq(unsigned int irq_nr)
+{
+        bcsr->intset_mask = 1<<(irq_nr - PB1200_INT_BEGIN);
+        bcsr->intset = 1<<(irq_nr - PB1200_INT_BEGIN);
+}
+
+inline void pb1200_disable_irq(unsigned int irq_nr)
+{
+        bcsr->intclr_mask = 1<<(irq_nr - PB1200_INT_BEGIN);
+        bcsr->intclr = 1<<(irq_nr - PB1200_INT_BEGIN);
+}
+
+static unsigned int pb1200_startup_irq( unsigned int irq_nr )
+{
+        if (++pb1200_cascade_en == 1)
+        {
+                request_irq(AU1000_GPIO_7, &pb1200_cascade_handler,
+                        0, "Pb1200 Cascade", &pb1200_cascade_handler );
+#ifdef CONFIG_MIPS_PB1200
+    /* We have a problem with CPLD rev3. Enable a workaround */
+        if( ((bcsr->whoami & BCSR_WHOAMI_CPLD)>>4) <= 3)
+        {
+                printk("\nWARNING!!!\n");
+                printk("\nWARNING!!!\n");
+                printk("\nWARNING!!!\n");
+                printk("\nWARNING!!!\n");
+                printk("\nWARNING!!!\n");
+                printk("\nWARNING!!!\n");
+                printk("Pb1200 must be at CPLD rev4. Please have Pb1200\n");
+                printk("updated to latest revision. This software will not\n");
+                printk("work on anything less than CPLD rev4\n");
+                printk("\nWARNING!!!\n");
+                printk("\nWARNING!!!\n");
+                printk("\nWARNING!!!\n");
+                printk("\nWARNING!!!\n");
+                printk("\nWARNING!!!\n");
+                printk("\nWARNING!!!\n");
+                while(1);
+        }
+#endif
+        }
+        pb1200_enable_irq(irq_nr);
+        return 0;
+}
+
+static void pb1200_shutdown_irq( unsigned int irq_nr )
+{
+        pb1200_disable_irq(irq_nr);
+        if (--pb1200_cascade_en == 0)
+        {
+                free_irq(AU1000_GPIO_7,&pb1200_cascade_handler );
+        }
+        return;
+}
+
+static inline void pb1200_mask_and_ack_irq(unsigned int irq_nr)
+{
+        pb1200_disable_irq( irq_nr );
+}
+
+static void pb1200_end_irq(unsigned int irq_nr)
+{
+        if (!(irq_desc[irq_nr].status & (IRQ_DISABLED|IRQ_INPROGRESS))) {
+                pb1200_enable_irq(irq_nr);
+        }
+}
+
+static struct hw_interrupt_type external_irq_type =
+{
+#ifdef CONFIG_MIPS_PB1200
+        "Pb1200 Ext",
+#endif
+#ifdef CONFIG_MIPS_DB1200
+        "Db1200 Ext",
+#endif
+        pb1200_startup_irq,
+        pb1200_shutdown_irq,
+        pb1200_enable_irq,
+        pb1200_disable_irq,
+        pb1200_mask_and_ack_irq,
+        pb1200_end_irq,
+        NULL
+};
+
+void _board_init_irq(void)
+{
+        int irq_nr;
+
+        for (irq_nr = PB1200_INT_BEGIN; irq_nr <= PB1200_INT_END; irq_nr++)
+        {
+                irq_desc[irq_nr].handler = &external_irq_type;
+                pb1200_disable_irq(irq_nr);
+        }
+
+        /* GPIO_7 can not be hooked here, so it is hooked upon first
+        request of any source attached to the cascade */
+}
+