From mboxrd@z Thu Jan  1 00:00:00 1970
From: Marcelo Tosatti <mtosatti@redhat.com>
Subject: [patch 5/8] testdev: add port to create/delete memslots
Date: Wed, 24 Mar 2010 18:24:13 -0300
Message-ID: <20100324212726.290507585@amt.cnet>
References: <20100324212408.790319364@amt.cnet>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
To: kvm@vger.kernel.org
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Content-Disposition: inline; filename=qemu-testdev-memslot
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Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

Index: qemu-kvm/hw/testdev.c
===================================================================
--- qemu-kvm.orig/hw/testdev.c
+++ qemu-kvm/hw/testdev.c
@@ -5,6 +5,10 @@
 struct testdev {
     ISADevice dev;
     CharDriverState *chr;
+    struct memslot {
+        target_phys_addr_t start;
+        target_phys_addr_t end;
+    } memslot;
 };
 
 static void test_device_serial_write(void *opaque, uint32_t addr, uint32_t data)
@@ -90,6 +94,45 @@ static CPUWriteMemoryFunc * const test_i
     test_iomem_writel,
 };
 
+#define CMD_CREATE_SLOT 0x0
+#define CMD_DELETE_SLOT 0x1
+
+static void test_device_memslot_write(void *opaque, uint32_t addr, uint32_t data)
+{
+    uint32_t port = addr - 0x2018;
+    struct testdev *dev = opaque;
+
+    switch(port) {
+    case 0:
+        dev->memslot.start = 0;
+    case 4:
+        dev->memslot.start |= (unsigned long)data << (port * 8);
+        break;
+    case 8:
+        dev->memslot.end = 0;
+    case 12:
+        dev->memslot.end |= (unsigned long)data << ((port-8) * 8);
+        break;
+    case 16:
+        if (data == CMD_CREATE_SLOT) {
+            ram_addr_t ram_addr, size;
+
+            size = dev->memslot.end - dev->memslot.start;
+
+            ram_addr = qemu_ram_alloc(size);
+            cpu_register_physical_memory(dev->memslot.start, size, ram_addr);
+        }
+        else if (data == CMD_DELETE_SLOT) {
+            ram_addr_t size = dev->memslot.end - dev->memslot.start;
+
+            cpu_register_physical_memory(dev->memslot.start, size,
+                                         IO_MEM_UNASSIGNED);
+        }
+    default:
+        break;
+    }
+}
+
 static int init_test_device(ISADevice *isa)
 {
     struct testdev *dev = DO_UPCAST(struct testdev, dev, isa);
@@ -105,6 +148,8 @@ static int init_test_device(ISADevice *i
     register_ioport_read(0xe0, 1, 4, test_device_ioport_read, dev);
     register_ioport_write(0xe0, 1, 4, test_device_ioport_write, dev);
     register_ioport_write(0x2000, 24, 1, test_device_irq_line, NULL);
+    register_ioport_write(0x2018, 20, 4, test_device_memslot_write, dev);
+
     iomem_buf = qemu_mallocz(0x10000);
     iomem = cpu_register_io_memory(test_iomem_read, test_iomem_write, NULL);
     cpu_register_physical_memory(0xff000000, 0x10000, iomem);