[Qemu-devel] [5924] sh4: mmio based CF support on r2d board (Takashi YOSHII).

[Andrzej Zaborowski]

Revision: 5924
          http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=5924
Author:   balrog
Date:     2008-12-07 18:41:42 +0000 (Sun, 07 Dec 2008)

Log Message:
-----------
sh4: mmio based CF support on r2d board (Takashi YOSHII).

 This patch adds emulation for a CompactFlash on sh4/r2d board.
 The device is CF, but wired to be worked as True-IDE mode, and connected
 directly to SH bus. So, this code is to support generally mmio based
 IDEs which are supported by "pata_platform" driver in linux kernel.

Signed-off-by: Takashi YOSHII <address@hidden>
Signed-off-by: Andrzej Zaborowski <address@hidden>

Modified Paths:
--------------
    trunk/Makefile.target
    trunk/hw/ide.c
    trunk/hw/r2d.c
    trunk/hw/sh.h

Modified: trunk/Makefile.target
===================================================================
--- trunk/Makefile.target       2008-12-07 18:15:54 UTC (rev 5923)
+++ trunk/Makefile.target       2008-12-07 18:41:42 UTC (rev 5924)
@@ -711,6 +711,7 @@
 ifeq ($(TARGET_BASE_ARCH), sh4)
 OBJS+= shix.o r2d.o sh7750.o sh7750_regnames.o tc58128.o
 OBJS+= sh_timer.o ptimer.o sh_serial.o sh_intc.o sm501.o serial.o
+OBJS+= ide.o
 endif
 ifeq ($(TARGET_BASE_ARCH), m68k)
 OBJS+= an5206.o mcf5206.o ptimer.o mcf_uart.o mcf_intc.o mcf5208.o mcf_fec.o

Modified: trunk/hw/ide.c
===================================================================
--- trunk/hw/ide.c      2008-12-07 18:15:54 UTC (rev 5923)
+++ trunk/hw/ide.c      2008-12-07 18:41:42 UTC (rev 5924)
@@ -3414,6 +3414,98 @@
 }
 
 /***********************************************************/
+/* MMIO based ide port
+ * This emulates IDE device connected directly to the CPU bus without
+ * dedicated ide controller, which is often seen on embedded boards.
+ */
+
+typedef struct {
+    void *dev;
+    int shift;
+} MMIOState;
+
+static uint32_t mmio_ide_read (void *opaque, target_phys_addr_t addr)
+{
+    MMIOState *s = (MMIOState*)opaque;
+    IDEState *ide = (IDEState*)s->dev;
+    addr >>= s->shift;
+    if (addr & 7)
+        return ide_ioport_read(ide, addr);
+    else
+        return ide_data_readw(ide, 0);
+}
+
+static void mmio_ide_write (void *opaque, target_phys_addr_t addr,
+       uint32_t val)
+{
+    MMIOState *s = (MMIOState*)opaque;
+    IDEState *ide = (IDEState*)s->dev;
+    addr >>= s->shift;
+    if (addr & 7)
+        ide_ioport_write(ide, addr, val);
+    else
+        ide_data_writew(ide, 0, val);
+}
+
+static CPUReadMemoryFunc *mmio_ide_reads[] = {
+    mmio_ide_read,
+    mmio_ide_read,
+    mmio_ide_read,
+};
+
+static CPUWriteMemoryFunc *mmio_ide_writes[] = {
+    mmio_ide_write,
+    mmio_ide_write,
+    mmio_ide_write,
+};
+
+static uint32_t mmio_ide_status_read (void *opaque, target_phys_addr_t addr)
+{
+    MMIOState *s= (MMIOState*)opaque;
+    IDEState *ide = (IDEState*)s->dev;
+    return ide_status_read(ide, 0);
+}
+
+static void mmio_ide_cmd_write (void *opaque, target_phys_addr_t addr,
+       uint32_t val)
+{
+    MMIOState *s = (MMIOState*)opaque;
+    IDEState *ide = (IDEState*)s->dev;
+    ide_cmd_write(ide, 0, val);
+}
+
+static CPUReadMemoryFunc *mmio_ide_status[] = {
+    mmio_ide_status_read,
+    mmio_ide_status_read,
+    mmio_ide_status_read,
+};
+
+static CPUWriteMemoryFunc *mmio_ide_cmd[] = {
+    mmio_ide_cmd_write,
+    mmio_ide_cmd_write,
+    mmio_ide_cmd_write,
+};
+
+void mmio_ide_init (target_phys_addr_t membase, target_phys_addr_t membase2,
+                    qemu_irq irq, int shift,
+                    BlockDriverState *hd0, BlockDriverState *hd1)
+{
+    MMIOState *s = qemu_mallocz(sizeof(MMIOState));
+    IDEState *ide = qemu_mallocz(sizeof(IDEState) * 2);
+    int mem1, mem2;
+
+    ide_init2(ide, hd0, hd1, irq);
+
+    s->dev = ide;
+    s->shift = shift;
+
+    mem1 = cpu_register_io_memory(0, mmio_ide_reads, mmio_ide_writes, s);
+    mem2 = cpu_register_io_memory(0, mmio_ide_status, mmio_ide_cmd, s);
+    cpu_register_physical_memory(membase, 16 << shift, mem1);
+    cpu_register_physical_memory(membase2, 2 << shift, mem2);
+}
+
+/***********************************************************/
 /* CF-ATA Microdrive */
 
 #define METADATA_SIZE  0x20

Modified: trunk/hw/r2d.c
===================================================================
--- trunk/hw/r2d.c      2008-12-07 18:15:54 UTC (rev 5923)
+++ trunk/hw/r2d.c      2008-12-07 18:41:42 UTC (rev 5924)
@@ -149,6 +149,11 @@
     sm501_vga_ram_addr = qemu_ram_alloc(SM501_VRAM_SIZE);
     sm501_init(ds, 0x10000000, sm501_vga_ram_addr, SM501_VRAM_SIZE,
               serial_hds[2]);
+
+    /* onboard CF (True IDE mode, Master only). */
+    mmio_ide_init(0x14001000, 0x1400080c, NULL, 1,
+                  drives_table[drive_get_index(IF_IDE, 0, 0)].bdrv, NULL);
+
     /* Todo: register on board registers */
     {
       int kernel_size;

Modified: trunk/hw/sh.h
===================================================================
--- trunk/hw/sh.h       2008-12-07 18:15:54 UTC (rev 5923)
+++ trunk/hw/sh.h       2008-12-07 18:41:42 UTC (rev 5924)
@@ -45,4 +45,8 @@
 /* tc58128.c */
 int tc58128_init(struct SH7750State *s, const char *zone1, const char *zone2);
 
+/* ide.c */
+void mmio_ide_init(target_phys_addr_t membase, target_phys_addr_t membase2,
+                   qemu_irq irq, int shift,
+                   BlockDriverState *hd0, BlockDriverState *hd1);
 #endif