[Qemu-devel] [PATCH 7/9] add L2x0/PL310 cache controller device

[Mark Langsdorf <mark.langsdorf@calxeda.com>]

From: Rob Herring <rob.herring@calxeda.com>

This is just a dummy device for ARM L2 cache controllers.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Mark Langsdorf <mark.langsdorf@calxeda.com>
---
  Makefile.target |    2 +-
  hw/arm_l2x0.c   |  109 
+++++++++++++++++++++++++++++++++++++++++++++++++++++++
  2 files changed, 110 insertions(+), 1 deletions(-)
  create mode 100644 hw/arm_l2x0.c

diff --git a/Makefile.target b/Makefile.target
index 3261383..e4132d6 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -335,7 +335,7 @@ endif
  obj-arm-y = integratorcp.o versatilepb.o arm_pic.o arm_timer.o
  obj-arm-y += arm_boot.o pl011.o pl031.o pl050.o pl080.o pl110.o 
pl181.o pl190.o
  obj-arm-y += versatile_pci.o
-obj-arm-y += realview_gic.o realview.o arm_sysctl.o arm11mpcore.o 
a9mpcore.o
+obj-arm-y += realview_gic.o realview.o arm_sysctl.o arm11mpcore.o 
a9mpcore.o arm_l2x0.o
  obj-arm-y += arm_mptimer.o
  obj-arm-y += armv7m.o armv7m_nvic.o stellaris.o pl022.o stellaris_enet.o
  obj-arm-y += pl061.o
diff --git a/hw/arm_l2x0.c b/hw/arm_l2x0.c
new file mode 100644
index 0000000..ce13311
--- /dev/null
+++ b/hw/arm_l2x0.c
@@ -0,0 +1,109 @@
+/*
+ * ARM dummy L210, L220, PL310 cache controller.
+ *
+ * Copyright (c) 2006-2007 CodeSourcery.
+ * Copyright (c) 2010-2012 Calxeda
+ * Written by Rob Herring
+ *
+ * This code is licenced under the GPL.
+ */
+
+#include "sysbus.h"
+
+typedef struct l2x0_state {
+    SysBusDevice busdev;
+    MemoryRegion iomem;
+    uint32_t ctrl;
+    uint32_t aux_ctrl;
+    uint32_t data_ctrl;
+    uint32_t tag_ctrl;
+    uint32_t filter_start;
+    uint32_t filter_end;
+} l2x0_state;
+
+static uint64_t l2x0_priv_read(void *opaque, target_phys_addr_t offset, 
unsigned size)
+{
+    l2x0_state *s = (l2x0_state *)opaque;
+    offset &= 0xfff;
+    if (offset == 0)
+        return 0x410000c6;
+    else if (offset == 0x4)
+        return 0x19080800;
+    else if (offset == 0x100)
+        return s->ctrl;
+    else if (offset == 0x104)
+        return s->aux_ctrl;
+    else if (offset == 0x108)
+        return s->tag_ctrl;
+    else if (offset == 0x10C)
+        return s->data_ctrl;
+    else if (offset >= 0x730 && offset < 0x800)
+        return 0; /* cache ops complete */
+    else if (offset == 0xC00)
+        return s->filter_start;
+    else if (offset == 0xC04)
+        return s->filter_end;
+    else if (offset == 0xF40)
+        return 0;
+    else if (offset == 0xF60)
+        return 0;
+    else if (offset == 0xF80)
+        return 0;
+
+    hw_error("l2x0_priv_read: Bad offset %x\n", (int)offset);
+    return 0;
+}
+
+static void l2x0_priv_write(void *opaque, target_phys_addr_t offset, 
uint64_t value, unsigned size)
+{
+    l2x0_state *s = (l2x0_state *)opaque;
+    offset &= 0xfff;
+    if (offset == 0x100)
+        s->ctrl = value & 1;
+    else if (offset == 0x104)
+        s->aux_ctrl = value;
+    else if (offset == 0x108)
+        s->tag_ctrl = value;
+    else if (offset == 0x10C)
+        s->data_ctrl = value;
+    else if (offset >= 0x730 && offset < 0x800)
+        /* ignore */
+        return;
+    else if (offset == 0xC00)
+        s->filter_start = value;
+    else if (offset == 0xC04)
+        s->filter_end = value;
+    else if (offset == 0xF40)
+        return;
+    else if (offset == 0xF60)
+        return;
+    else if (offset == 0xF80)
+        return;
+    else
+        hw_error("l2x0_priv_write: Bad offset %x\n", (int)offset);
+}
+
+static const MemoryRegionOps l2x0_mem_ops = {
+    .read = l2x0_priv_read,
+    .write = l2x0_priv_write,
+    .endianness = DEVICE_NATIVE_ENDIAN,
+ };
+
+static int l2x0_priv_init(SysBusDevice *dev)
+{
+    l2x0_state *s = FROM_SYSBUS(l2x0_state, dev);
+
+    s->aux_ctrl = 0x00020000;
+
+    memory_region_init_io(&s->iomem, &l2x0_mem_ops, s, "l2x0_cc", 0x1000);
+    sysbus_init_mmio(dev, &s->iomem);
+    return 0;
+}
+
+static void l2x0_register_device(void)
+{
+    sysbus_register_dev("l2x0_cc", sizeof(l2x0_state), l2x0_priv_init);
+}
+
+device_init(l2x0_register_device)
+
-- 
1.7.5.4