Patchwork [05/12] hw/omap2.c : separate gpmc(general purpose memory controller)

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Submitter cmchao
Date May 28, 2010, 5:43 p.m.
Message ID <1275068605-14475-6-git-send-email-cmchao@gmail.com>
Download mbox | patch
Permalink /patch/53941/
State New
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cmchao - May 28, 2010, 5:43 p.m.
Signed-off-by: cmchao <cmchao@gmail.com>
---
 Makefile.target |    2 +-
 hw/omap.h       |    2 +
 hw/omap2.c      |  396 ----------------------------------------------------
 hw/omap_gpmc.c  |  419 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 422 insertions(+), 397 deletions(-)
 create mode 100644 hw/omap_gpmc.c

Patch

diff --git a/Makefile.target b/Makefile.target
index 43c1708..e6abaa7 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -264,7 +264,7 @@  obj-arm-y += pxa2xx_lcd.o pxa2xx_mmci.o pxa2xx_pcmcia.o pxa2xx_keypad.o
 obj-arm-y += gumstix.o
 obj-arm-y += zaurus.o ide/microdrive.o spitz.o tosa.o tc6393xb.o
 obj-arm-y += omap1.o omap_lcdc.o omap_dma.o omap_clk.o omap_mmc.o omap_i2c.o omap_gpio.o
-obj-arm-y += omap2.o omap_dss.o soc_dma.o omap_gptimer.o omap_synctimer.o
+obj-arm-y += omap2.o omap_dss.o soc_dma.o omap_gptimer.o omap_synctimer.o omap_gpmc.o
 obj-arm-y += omap_sx1.o palm.o tsc210x.o
 obj-arm-y += nseries.o blizzard.o onenand.o vga.o cbus.o tusb6010.o usb-musb.o
 obj-arm-y += mst_fpga.o mainstone.o
diff --git a/hw/omap.h b/hw/omap.h
index b898230..c596953 100644
--- a/hw/omap.h
+++ b/hw/omap.h
@@ -93,8 +93,10 @@  struct omap_sysctl_s *omap_sysctl_init(struct omap_target_agent_s *ta,
 struct omap_sdrc_s;
 struct omap_sdrc_s *omap_sdrc_init(target_phys_addr_t base);
 
+/* OMAP2 general purpose memory controller */
 struct omap_gpmc_s;
 struct omap_gpmc_s *omap_gpmc_init(target_phys_addr_t base, qemu_irq irq);
+void omap_gpmc_reset(struct omap_gpmc_s *s);
 void omap_gpmc_attach(struct omap_gpmc_s *s, int cs, int iomemtype,
                 void (*base_upd)(void *opaque, target_phys_addr_t new),
                 void (*unmap)(void *opaque), void *opaque);
diff --git a/hw/omap2.c b/hw/omap2.c
index e310eef..b1e5aae 100644
--- a/hw/omap2.c
+++ b/hw/omap2.c
@@ -2988,402 +2988,6 @@  struct omap_sdrc_s *omap_sdrc_init(target_phys_addr_t base)
     return s;
 }
 
-/* General-Purpose Memory Controller */
-struct omap_gpmc_s {
-    qemu_irq irq;
-
-    uint8_t sysconfig;
-    uint16_t irqst;
-    uint16_t irqen;
-    uint16_t timeout;
-    uint16_t config;
-    uint32_t prefconfig[2];
-    int prefcontrol;
-    int preffifo;
-    int prefcount;
-    struct omap_gpmc_cs_file_s {
-        uint32_t config[7];
-        target_phys_addr_t base;
-        size_t size;
-        int iomemtype;
-        void (*base_update)(void *opaque, target_phys_addr_t new);
-        void (*unmap)(void *opaque);
-        void *opaque;
-    } cs_file[8];
-    int ecc_cs;
-    int ecc_ptr;
-    uint32_t ecc_cfg;
-    ECCState ecc[9];
-};
-
-static void omap_gpmc_int_update(struct omap_gpmc_s *s)
-{
-    qemu_set_irq(s->irq, s->irqen & s->irqst);
-}
-
-static void omap_gpmc_cs_map(struct omap_gpmc_cs_file_s *f, int base, int mask)
-{
-    /* TODO: check for overlapping regions and report access errors */
-    if ((mask != 0x8 && mask != 0xc && mask != 0xe && mask != 0xf) ||
-                    (base < 0 || base >= 0x40) ||
-                    (base & 0x0f & ~mask)) {
-        fprintf(stderr, "%s: wrong cs address mapping/decoding!\n",
-                        __FUNCTION__);
-        return;
-    }
-
-    if (!f->opaque)
-        return;
-
-    f->base = base << 24;
-    f->size = (0x0fffffff & ~(mask << 24)) + 1;
-    /* TODO: rather than setting the size of the mapping (which should be
-     * constant), the mask should cause wrapping of the address space, so
-     * that the same memory becomes accessible at every <i>size</i> bytes
-     * starting from <i>base</i>.  */
-    if (f->iomemtype)
-        cpu_register_physical_memory(f->base, f->size, f->iomemtype);
-
-    if (f->base_update)
-        f->base_update(f->opaque, f->base);
-}
-
-static void omap_gpmc_cs_unmap(struct omap_gpmc_cs_file_s *f)
-{
-    if (f->size) {
-        if (f->unmap)
-            f->unmap(f->opaque);
-        if (f->iomemtype)
-            cpu_register_physical_memory(f->base, f->size, IO_MEM_UNASSIGNED);
-        f->base = 0;
-        f->size = 0;
-    }
-}
-
-static void omap_gpmc_reset(struct omap_gpmc_s *s)
-{
-    int i;
-
-    s->sysconfig = 0;
-    s->irqst = 0;
-    s->irqen = 0;
-    omap_gpmc_int_update(s);
-    s->timeout = 0;
-    s->config = 0xa00;
-    s->prefconfig[0] = 0x00004000;
-    s->prefconfig[1] = 0x00000000;
-    s->prefcontrol = 0;
-    s->preffifo = 0;
-    s->prefcount = 0;
-    for (i = 0; i < 8; i ++) {
-        if (s->cs_file[i].config[6] & (1 << 6))			/* CSVALID */
-            omap_gpmc_cs_unmap(s->cs_file + i);
-        s->cs_file[i].config[0] = i ? 1 << 12 : 0;
-        s->cs_file[i].config[1] = 0x101001;
-        s->cs_file[i].config[2] = 0x020201;
-        s->cs_file[i].config[3] = 0x10031003;
-        s->cs_file[i].config[4] = 0x10f1111;
-        s->cs_file[i].config[5] = 0;
-        s->cs_file[i].config[6] = 0xf00 | (i ? 0 : 1 << 6);
-        if (s->cs_file[i].config[6] & (1 << 6))			/* CSVALID */
-            omap_gpmc_cs_map(&s->cs_file[i],
-                            s->cs_file[i].config[6] & 0x1f,	/* MASKADDR */
-                        (s->cs_file[i].config[6] >> 8 & 0xf));	/* BASEADDR */
-    }
-    omap_gpmc_cs_map(s->cs_file, 0, 0xf);
-    s->ecc_cs = 0;
-    s->ecc_ptr = 0;
-    s->ecc_cfg = 0x3fcff000;
-    for (i = 0; i < 9; i ++)
-        ecc_reset(&s->ecc[i]);
-}
-
-static uint32_t omap_gpmc_read(void *opaque, target_phys_addr_t addr)
-{
-    struct omap_gpmc_s *s = (struct omap_gpmc_s *) opaque;
-    int cs;
-    struct omap_gpmc_cs_file_s *f;
-
-    switch (addr) {
-    case 0x000:	/* GPMC_REVISION */
-        return 0x20;
-
-    case 0x010:	/* GPMC_SYSCONFIG */
-        return s->sysconfig;
-
-    case 0x014:	/* GPMC_SYSSTATUS */
-        return 1;						/* RESETDONE */
-
-    case 0x018:	/* GPMC_IRQSTATUS */
-        return s->irqst;
-
-    case 0x01c:	/* GPMC_IRQENABLE */
-        return s->irqen;
-
-    case 0x040:	/* GPMC_TIMEOUT_CONTROL */
-        return s->timeout;
-
-    case 0x044:	/* GPMC_ERR_ADDRESS */
-    case 0x048:	/* GPMC_ERR_TYPE */
-        return 0;
-
-    case 0x050:	/* GPMC_CONFIG */
-        return s->config;
-
-    case 0x054:	/* GPMC_STATUS */
-        return 0x001;
-
-    case 0x060 ... 0x1d4:
-        cs = (addr - 0x060) / 0x30;
-        addr -= cs * 0x30;
-        f = s->cs_file + cs;
-        switch (addr) {
-            case 0x60:	/* GPMC_CONFIG1 */
-                return f->config[0];
-            case 0x64:	/* GPMC_CONFIG2 */
-                return f->config[1];
-            case 0x68:	/* GPMC_CONFIG3 */
-                return f->config[2];
-            case 0x6c:	/* GPMC_CONFIG4 */
-                return f->config[3];
-            case 0x70:	/* GPMC_CONFIG5 */
-                return f->config[4];
-            case 0x74:	/* GPMC_CONFIG6 */
-                return f->config[5];
-            case 0x78:	/* GPMC_CONFIG7 */
-                return f->config[6];
-            case 0x84:	/* GPMC_NAND_DATA */
-                return 0;
-        }
-        break;
-
-    case 0x1e0:	/* GPMC_PREFETCH_CONFIG1 */
-        return s->prefconfig[0];
-    case 0x1e4:	/* GPMC_PREFETCH_CONFIG2 */
-        return s->prefconfig[1];
-    case 0x1ec:	/* GPMC_PREFETCH_CONTROL */
-        return s->prefcontrol;
-    case 0x1f0:	/* GPMC_PREFETCH_STATUS */
-        return (s->preffifo << 24) |
-                ((s->preffifo >
-                  ((s->prefconfig[0] >> 8) & 0x7f) ? 1 : 0) << 16) |
-                s->prefcount;
-
-    case 0x1f4:	/* GPMC_ECC_CONFIG */
-        return s->ecc_cs;
-    case 0x1f8:	/* GPMC_ECC_CONTROL */
-        return s->ecc_ptr;
-    case 0x1fc:	/* GPMC_ECC_SIZE_CONFIG */
-        return s->ecc_cfg;
-    case 0x200 ... 0x220:	/* GPMC_ECC_RESULT */
-        cs = (addr & 0x1f) >> 2;
-        /* TODO: check correctness */
-        return
-                ((s->ecc[cs].cp    &  0x07) <<  0) |
-                ((s->ecc[cs].cp    &  0x38) << 13) |
-                ((s->ecc[cs].lp[0] & 0x1ff) <<  3) |
-                ((s->ecc[cs].lp[1] & 0x1ff) << 19);
-
-    case 0x230:	/* GPMC_TESTMODE_CTRL */
-        return 0;
-    case 0x234:	/* GPMC_PSA_LSB */
-    case 0x238:	/* GPMC_PSA_MSB */
-        return 0x00000000;
-    }
-
-    OMAP_BAD_REG(addr);
-    return 0;
-}
-
-static void omap_gpmc_write(void *opaque, target_phys_addr_t addr,
-                uint32_t value)
-{
-    struct omap_gpmc_s *s = (struct omap_gpmc_s *) opaque;
-    int cs;
-    struct omap_gpmc_cs_file_s *f;
-
-    switch (addr) {
-    case 0x000:	/* GPMC_REVISION */
-    case 0x014:	/* GPMC_SYSSTATUS */
-    case 0x054:	/* GPMC_STATUS */
-    case 0x1f0:	/* GPMC_PREFETCH_STATUS */
-    case 0x200 ... 0x220:	/* GPMC_ECC_RESULT */
-    case 0x234:	/* GPMC_PSA_LSB */
-    case 0x238:	/* GPMC_PSA_MSB */
-        OMAP_RO_REG(addr);
-        break;
-
-    case 0x010:	/* GPMC_SYSCONFIG */
-        if ((value >> 3) == 0x3)
-            fprintf(stderr, "%s: bad SDRAM idle mode %i\n",
-                            __FUNCTION__, value >> 3);
-        if (value & 2)
-            omap_gpmc_reset(s);
-        s->sysconfig = value & 0x19;
-        break;
-
-    case 0x018:	/* GPMC_IRQSTATUS */
-        s->irqen = ~value;
-        omap_gpmc_int_update(s);
-        break;
-
-    case 0x01c:	/* GPMC_IRQENABLE */
-        s->irqen = value & 0xf03;
-        omap_gpmc_int_update(s);
-        break;
-
-    case 0x040:	/* GPMC_TIMEOUT_CONTROL */
-        s->timeout = value & 0x1ff1;
-        break;
-
-    case 0x044:	/* GPMC_ERR_ADDRESS */
-    case 0x048:	/* GPMC_ERR_TYPE */
-        break;
-
-    case 0x050:	/* GPMC_CONFIG */
-        s->config = value & 0xf13;
-        break;
-
-    case 0x060 ... 0x1d4:
-        cs = (addr - 0x060) / 0x30;
-        addr -= cs * 0x30;
-        f = s->cs_file + cs;
-        switch (addr) {
-            case 0x60:	/* GPMC_CONFIG1 */
-                f->config[0] = value & 0xffef3e13;
-                break;
-            case 0x64:	/* GPMC_CONFIG2 */
-                f->config[1] = value & 0x001f1f8f;
-                break;
-            case 0x68:	/* GPMC_CONFIG3 */
-                f->config[2] = value & 0x001f1f8f;
-                break;
-            case 0x6c:	/* GPMC_CONFIG4 */
-                f->config[3] = value & 0x1f8f1f8f;
-                break;
-            case 0x70:	/* GPMC_CONFIG5 */
-                f->config[4] = value & 0x0f1f1f1f;
-                break;
-            case 0x74:	/* GPMC_CONFIG6 */
-                f->config[5] = value & 0x00000fcf;
-                break;
-            case 0x78:	/* GPMC_CONFIG7 */
-                if ((f->config[6] ^ value) & 0xf7f) {
-                    if (f->config[6] & (1 << 6))		/* CSVALID */
-                        omap_gpmc_cs_unmap(f);
-                    if (value & (1 << 6))			/* CSVALID */
-                        omap_gpmc_cs_map(f, value & 0x1f,	/* MASKADDR */
-                                        (value >> 8 & 0xf));	/* BASEADDR */
-                }
-                f->config[6] = value & 0x00000f7f;
-                break;
-            case 0x7c:	/* GPMC_NAND_COMMAND */
-            case 0x80:	/* GPMC_NAND_ADDRESS */
-            case 0x84:	/* GPMC_NAND_DATA */
-                break;
-
-            default:
-                goto bad_reg;
-        }
-        break;
-
-    case 0x1e0:	/* GPMC_PREFETCH_CONFIG1 */
-        s->prefconfig[0] = value & 0x7f8f7fbf;
-        /* TODO: update interrupts, fifos, dmas */
-        break;
-
-    case 0x1e4:	/* GPMC_PREFETCH_CONFIG2 */
-        s->prefconfig[1] = value & 0x3fff;
-        break;
-
-    case 0x1ec:	/* GPMC_PREFETCH_CONTROL */
-        s->prefcontrol = value & 1;
-        if (s->prefcontrol) {
-            if (s->prefconfig[0] & 1)
-                s->preffifo = 0x40;
-            else
-                s->preffifo = 0x00;
-        }
-        /* TODO: start */
-        break;
-
-    case 0x1f4:	/* GPMC_ECC_CONFIG */
-        s->ecc_cs = 0x8f;
-        break;
-    case 0x1f8:	/* GPMC_ECC_CONTROL */
-        if (value & (1 << 8))
-            for (cs = 0; cs < 9; cs ++)
-                ecc_reset(&s->ecc[cs]);
-        s->ecc_ptr = value & 0xf;
-        if (s->ecc_ptr == 0 || s->ecc_ptr > 9) {
-            s->ecc_ptr = 0;
-            s->ecc_cs &= ~1;
-        }
-        break;
-    case 0x1fc:	/* GPMC_ECC_SIZE_CONFIG */
-        s->ecc_cfg = value & 0x3fcff1ff;
-        break;
-    case 0x230:	/* GPMC_TESTMODE_CTRL */
-        if (value & 7)
-            fprintf(stderr, "%s: test mode enable attempt\n", __FUNCTION__);
-        break;
-
-    default:
-    bad_reg:
-        OMAP_BAD_REG(addr);
-        return;
-    }
-}
-
-static CPUReadMemoryFunc * const omap_gpmc_readfn[] = {
-    omap_badwidth_read32,	/* TODO */
-    omap_badwidth_read32,	/* TODO */
-    omap_gpmc_read,
-};
-
-static CPUWriteMemoryFunc * const omap_gpmc_writefn[] = {
-    omap_badwidth_write32,	/* TODO */
-    omap_badwidth_write32,	/* TODO */
-    omap_gpmc_write,
-};
-
-struct omap_gpmc_s *omap_gpmc_init(target_phys_addr_t base, qemu_irq irq)
-{
-    int iomemtype;
-    struct omap_gpmc_s *s = (struct omap_gpmc_s *)
-            qemu_mallocz(sizeof(struct omap_gpmc_s));
-
-    omap_gpmc_reset(s);
-
-    iomemtype = cpu_register_io_memory(omap_gpmc_readfn,
-                    omap_gpmc_writefn, s);
-    cpu_register_physical_memory(base, 0x1000, iomemtype);
-
-    return s;
-}
-
-void omap_gpmc_attach(struct omap_gpmc_s *s, int cs, int iomemtype,
-                void (*base_upd)(void *opaque, target_phys_addr_t new),
-                void (*unmap)(void *opaque), void *opaque)
-{
-    struct omap_gpmc_cs_file_s *f;
-
-    if (cs < 0 || cs >= 8) {
-        fprintf(stderr, "%s: bad chip-select %i\n", __FUNCTION__, cs);
-        exit(-1);
-    }
-    f = &s->cs_file[cs];
-
-    f->iomemtype = iomemtype;
-    f->base_update = base_upd;
-    f->unmap = unmap;
-    f->opaque = opaque;
-
-    if (f->config[6] & (1 << 6))				/* CSVALID */
-        omap_gpmc_cs_map(f, f->config[6] & 0x1f,		/* MASKADDR */
-                        (f->config[6] >> 8 & 0xf));		/* BASEADDR */
-}
-
 /* General chip reset */
 static void omap2_mpu_reset(void *opaque)
 {
diff --git a/hw/omap_gpmc.c b/hw/omap_gpmc.c
new file mode 100644
index 0000000..72cfecc
--- /dev/null
+++ b/hw/omap_gpmc.c
@@ -0,0 +1,419 @@ 
+/*
+ * TI OMAP general purpose memory controller emulation.
+ *
+ * Copyright (C) 2007-2009 Nokia Corporation
+ * Original code written by Andrzej Zaborowski <andrew@openedhand.com>
+ * Enhancements for OMAP3 and NAND support written by Juha Riihimäki
+ *
+ * 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 or
+ * (at your option) any later version of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+#include "hw.h"
+#include "flash.h"
+#include "omap.h"
+
+/* General-Purpose Memory Controller */
+struct omap_gpmc_s {
+    qemu_irq irq;
+
+    uint8_t sysconfig;
+    uint16_t irqst;
+    uint16_t irqen;
+    uint16_t timeout;
+    uint16_t config;
+    uint32_t prefconfig[2];
+    int prefcontrol;
+    int preffifo;
+    int prefcount;
+    struct omap_gpmc_cs_file_s {
+        uint32_t config[7];
+        target_phys_addr_t base;
+        size_t size;
+        int iomemtype;
+        void (*base_update)(void *opaque, target_phys_addr_t new);
+        void (*unmap)(void *opaque);
+        void *opaque;
+    } cs_file[8];
+    int ecc_cs;
+    int ecc_ptr;
+    uint32_t ecc_cfg;
+    ECCState ecc[9];
+};
+
+static void omap_gpmc_int_update(struct omap_gpmc_s *s)
+{
+    qemu_set_irq(s->irq, s->irqen & s->irqst);
+}
+
+static void omap_gpmc_cs_map(struct omap_gpmc_cs_file_s *f, int base, int mask)
+{
+    /* TODO: check for overlapping regions and report access errors */
+    if ((mask != 0x8 && mask != 0xc && mask != 0xe && mask != 0xf) ||
+                    (base < 0 || base >= 0x40) ||
+                    (base & 0x0f & ~mask)) {
+        fprintf(stderr, "%s: wrong cs address mapping/decoding!\n",
+                        __FUNCTION__);
+        return;
+    }
+
+    if (!f->opaque)
+        return;
+
+    f->base = base << 24;
+    f->size = (0x0fffffff & ~(mask << 24)) + 1;
+    /* TODO: rather than setting the size of the mapping (which should be
+     * constant), the mask should cause wrapping of the address space, so
+     * that the same memory becomes accessible at every <i>size</i> bytes
+     * starting from <i>base</i>.  */
+    if (f->iomemtype)
+        cpu_register_physical_memory(f->base, f->size, f->iomemtype);
+
+    if (f->base_update)
+        f->base_update(f->opaque, f->base);
+}
+
+static void omap_gpmc_cs_unmap(struct omap_gpmc_cs_file_s *f)
+{
+    if (f->size) {
+        if (f->unmap)
+            f->unmap(f->opaque);
+        if (f->iomemtype)
+            cpu_register_physical_memory(f->base, f->size, IO_MEM_UNASSIGNED);
+        f->base = 0;
+        f->size = 0;
+    }
+}
+
+void omap_gpmc_reset(struct omap_gpmc_s *s)
+{
+    int i;
+
+    s->sysconfig = 0;
+    s->irqst = 0;
+    s->irqen = 0;
+    omap_gpmc_int_update(s);
+    s->timeout = 0;
+    s->config = 0xa00;
+    s->prefconfig[0] = 0x00004000;
+    s->prefconfig[1] = 0x00000000;
+    s->prefcontrol = 0;
+    s->preffifo = 0;
+    s->prefcount = 0;
+    for (i = 0; i < 8; i ++) {
+        if (s->cs_file[i].config[6] & (1 << 6))			/* CSVALID */
+            omap_gpmc_cs_unmap(s->cs_file + i);
+        s->cs_file[i].config[0] = i ? 1 << 12 : 0;
+        s->cs_file[i].config[1] = 0x101001;
+        s->cs_file[i].config[2] = 0x020201;
+        s->cs_file[i].config[3] = 0x10031003;
+        s->cs_file[i].config[4] = 0x10f1111;
+        s->cs_file[i].config[5] = 0;
+        s->cs_file[i].config[6] = 0xf00 | (i ? 0 : 1 << 6);
+        if (s->cs_file[i].config[6] & (1 << 6))			/* CSVALID */
+            omap_gpmc_cs_map(&s->cs_file[i],
+                            s->cs_file[i].config[6] & 0x1f,	/* MASKADDR */
+                        (s->cs_file[i].config[6] >> 8 & 0xf));	/* BASEADDR */
+    }
+    omap_gpmc_cs_map(s->cs_file, 0, 0xf);
+    s->ecc_cs = 0;
+    s->ecc_ptr = 0;
+    s->ecc_cfg = 0x3fcff000;
+    for (i = 0; i < 9; i ++)
+        ecc_reset(&s->ecc[i]);
+}
+
+static uint32_t omap_gpmc_read(void *opaque, target_phys_addr_t addr)
+{
+    struct omap_gpmc_s *s = (struct omap_gpmc_s *) opaque;
+    int cs;
+    struct omap_gpmc_cs_file_s *f;
+
+    switch (addr) {
+    case 0x000:	/* GPMC_REVISION */
+        return 0x20;
+
+    case 0x010:	/* GPMC_SYSCONFIG */
+        return s->sysconfig;
+
+    case 0x014:	/* GPMC_SYSSTATUS */
+        return 1;						/* RESETDONE */
+
+    case 0x018:	/* GPMC_IRQSTATUS */
+        return s->irqst;
+
+    case 0x01c:	/* GPMC_IRQENABLE */
+        return s->irqen;
+
+    case 0x040:	/* GPMC_TIMEOUT_CONTROL */
+        return s->timeout;
+
+    case 0x044:	/* GPMC_ERR_ADDRESS */
+    case 0x048:	/* GPMC_ERR_TYPE */
+        return 0;
+
+    case 0x050:	/* GPMC_CONFIG */
+        return s->config;
+
+    case 0x054:	/* GPMC_STATUS */
+        return 0x001;
+
+    case 0x060 ... 0x1d4:
+        cs = (addr - 0x060) / 0x30;
+        addr -= cs * 0x30;
+        f = s->cs_file + cs;
+        switch (addr) {
+            case 0x60:	/* GPMC_CONFIG1 */
+                return f->config[0];
+            case 0x64:	/* GPMC_CONFIG2 */
+                return f->config[1];
+            case 0x68:	/* GPMC_CONFIG3 */
+                return f->config[2];
+            case 0x6c:	/* GPMC_CONFIG4 */
+                return f->config[3];
+            case 0x70:	/* GPMC_CONFIG5 */
+                return f->config[4];
+            case 0x74:	/* GPMC_CONFIG6 */
+                return f->config[5];
+            case 0x78:	/* GPMC_CONFIG7 */
+                return f->config[6];
+            case 0x84:	/* GPMC_NAND_DATA */
+                return 0;
+        }
+        break;
+
+    case 0x1e0:	/* GPMC_PREFETCH_CONFIG1 */
+        return s->prefconfig[0];
+    case 0x1e4:	/* GPMC_PREFETCH_CONFIG2 */
+        return s->prefconfig[1];
+    case 0x1ec:	/* GPMC_PREFETCH_CONTROL */
+        return s->prefcontrol;
+    case 0x1f0:	/* GPMC_PREFETCH_STATUS */
+        return (s->preffifo << 24) |
+                ((s->preffifo >
+                  ((s->prefconfig[0] >> 8) & 0x7f) ? 1 : 0) << 16) |
+                s->prefcount;
+
+    case 0x1f4:	/* GPMC_ECC_CONFIG */
+        return s->ecc_cs;
+    case 0x1f8:	/* GPMC_ECC_CONTROL */
+        return s->ecc_ptr;
+    case 0x1fc:	/* GPMC_ECC_SIZE_CONFIG */
+        return s->ecc_cfg;
+    case 0x200 ... 0x220:	/* GPMC_ECC_RESULT */
+        cs = (addr & 0x1f) >> 2;
+        /* TODO: check correctness */
+        return
+                ((s->ecc[cs].cp    &  0x07) <<  0) |
+                ((s->ecc[cs].cp    &  0x38) << 13) |
+                ((s->ecc[cs].lp[0] & 0x1ff) <<  3) |
+                ((s->ecc[cs].lp[1] & 0x1ff) << 19);
+
+    case 0x230:	/* GPMC_TESTMODE_CTRL */
+        return 0;
+    case 0x234:	/* GPMC_PSA_LSB */
+    case 0x238:	/* GPMC_PSA_MSB */
+        return 0x00000000;
+    }
+
+    OMAP_BAD_REG(addr);
+    return 0;
+}
+
+static void omap_gpmc_write(void *opaque, target_phys_addr_t addr,
+                uint32_t value)
+{
+    struct omap_gpmc_s *s = (struct omap_gpmc_s *) opaque;
+    int cs;
+    struct omap_gpmc_cs_file_s *f;
+
+    switch (addr) {
+    case 0x000:	/* GPMC_REVISION */
+    case 0x014:	/* GPMC_SYSSTATUS */
+    case 0x054:	/* GPMC_STATUS */
+    case 0x1f0:	/* GPMC_PREFETCH_STATUS */
+    case 0x200 ... 0x220:	/* GPMC_ECC_RESULT */
+    case 0x234:	/* GPMC_PSA_LSB */
+    case 0x238:	/* GPMC_PSA_MSB */
+        OMAP_RO_REG(addr);
+        break;
+
+    case 0x010:	/* GPMC_SYSCONFIG */
+        if ((value >> 3) == 0x3)
+            fprintf(stderr, "%s: bad SDRAM idle mode %i\n",
+                            __FUNCTION__, value >> 3);
+        if (value & 2)
+            omap_gpmc_reset(s);
+        s->sysconfig = value & 0x19;
+        break;
+
+    case 0x018:	/* GPMC_IRQSTATUS */
+        s->irqen = ~value;
+        omap_gpmc_int_update(s);
+        break;
+
+    case 0x01c:	/* GPMC_IRQENABLE */
+        s->irqen = value & 0xf03;
+        omap_gpmc_int_update(s);
+        break;
+
+    case 0x040:	/* GPMC_TIMEOUT_CONTROL */
+        s->timeout = value & 0x1ff1;
+        break;
+
+    case 0x044:	/* GPMC_ERR_ADDRESS */
+    case 0x048:	/* GPMC_ERR_TYPE */
+        break;
+
+    case 0x050:	/* GPMC_CONFIG */
+        s->config = value & 0xf13;
+        break;
+
+    case 0x060 ... 0x1d4:
+        cs = (addr - 0x060) / 0x30;
+        addr -= cs * 0x30;
+        f = s->cs_file + cs;
+        switch (addr) {
+            case 0x60:	/* GPMC_CONFIG1 */
+                f->config[0] = value & 0xffef3e13;
+                break;
+            case 0x64:	/* GPMC_CONFIG2 */
+                f->config[1] = value & 0x001f1f8f;
+                break;
+            case 0x68:	/* GPMC_CONFIG3 */
+                f->config[2] = value & 0x001f1f8f;
+                break;
+            case 0x6c:	/* GPMC_CONFIG4 */
+                f->config[3] = value & 0x1f8f1f8f;
+                break;
+            case 0x70:	/* GPMC_CONFIG5 */
+                f->config[4] = value & 0x0f1f1f1f;
+                break;
+            case 0x74:	/* GPMC_CONFIG6 */
+                f->config[5] = value & 0x00000fcf;
+                break;
+            case 0x78:	/* GPMC_CONFIG7 */
+                if ((f->config[6] ^ value) & 0xf7f) {
+                    if (f->config[6] & (1 << 6))		/* CSVALID */
+                        omap_gpmc_cs_unmap(f);
+                    if (value & (1 << 6))			/* CSVALID */
+                        omap_gpmc_cs_map(f, value & 0x1f,	/* MASKADDR */
+                                        (value >> 8 & 0xf));	/* BASEADDR */
+                }
+                f->config[6] = value & 0x00000f7f;
+                break;
+            case 0x7c:	/* GPMC_NAND_COMMAND */
+            case 0x80:	/* GPMC_NAND_ADDRESS */
+            case 0x84:	/* GPMC_NAND_DATA */
+                break;
+
+            default:
+                goto bad_reg;
+        }
+        break;
+
+    case 0x1e0:	/* GPMC_PREFETCH_CONFIG1 */
+        s->prefconfig[0] = value & 0x7f8f7fbf;
+        /* TODO: update interrupts, fifos, dmas */
+        break;
+
+    case 0x1e4:	/* GPMC_PREFETCH_CONFIG2 */
+        s->prefconfig[1] = value & 0x3fff;
+        break;
+
+    case 0x1ec:	/* GPMC_PREFETCH_CONTROL */
+        s->prefcontrol = value & 1;
+        if (s->prefcontrol) {
+            if (s->prefconfig[0] & 1)
+                s->preffifo = 0x40;
+            else
+                s->preffifo = 0x00;
+        }
+        /* TODO: start */
+        break;
+
+    case 0x1f4:	/* GPMC_ECC_CONFIG */
+        s->ecc_cs = 0x8f;
+        break;
+    case 0x1f8:	/* GPMC_ECC_CONTROL */
+        if (value & (1 << 8))
+            for (cs = 0; cs < 9; cs ++)
+                ecc_reset(&s->ecc[cs]);
+        s->ecc_ptr = value & 0xf;
+        if (s->ecc_ptr == 0 || s->ecc_ptr > 9) {
+            s->ecc_ptr = 0;
+            s->ecc_cs &= ~1;
+        }
+        break;
+    case 0x1fc:	/* GPMC_ECC_SIZE_CONFIG */
+        s->ecc_cfg = value & 0x3fcff1ff;
+        break;
+    case 0x230:	/* GPMC_TESTMODE_CTRL */
+        if (value & 7)
+            fprintf(stderr, "%s: test mode enable attempt\n", __FUNCTION__);
+        break;
+
+    default:
+    bad_reg:
+        OMAP_BAD_REG(addr);
+        return;
+    }
+}
+
+static CPUReadMemoryFunc * const omap_gpmc_readfn[] = {
+    omap_badwidth_read32,	/* TODO */
+    omap_badwidth_read32,	/* TODO */
+    omap_gpmc_read,
+};
+
+static CPUWriteMemoryFunc * const omap_gpmc_writefn[] = {
+    omap_badwidth_write32,	/* TODO */
+    omap_badwidth_write32,	/* TODO */
+    omap_gpmc_write,
+};
+
+struct omap_gpmc_s *omap_gpmc_init(target_phys_addr_t base, qemu_irq irq)
+{
+    int iomemtype;
+    struct omap_gpmc_s *s = (struct omap_gpmc_s *)
+            qemu_mallocz(sizeof(struct omap_gpmc_s));
+
+    omap_gpmc_reset(s);
+
+    iomemtype = cpu_register_io_memory(omap_gpmc_readfn,
+                    omap_gpmc_writefn, s);
+    cpu_register_physical_memory(base, 0x1000, iomemtype);
+
+    return s;
+}
+
+void omap_gpmc_attach(struct omap_gpmc_s *s, int cs, int iomemtype,
+                void (*base_upd)(void *opaque, target_phys_addr_t new),
+                void (*unmap)(void *opaque), void *opaque)
+{
+    struct omap_gpmc_cs_file_s *f;
+
+    if (cs < 0 || cs >= 8) {
+        fprintf(stderr, "%s: bad chip-select %i\n", __FUNCTION__, cs);
+        exit(-1);
+    }
+    f = &s->cs_file[cs];
+
+    f->iomemtype = iomemtype;
+    f->base_update = base_upd;
+    f->unmap = unmap;
+    f->opaque = opaque;
+
+    if (f->config[6] & (1 << 6))				/* CSVALID */
+        omap_gpmc_cs_map(f, f->config[6] & 0x1f,		/* MASKADDR */
+                        (f->config[6] >> 8 & 0xf));		/* BASEADDR */
+}