1 files changed, 125 insertions, 0 deletions
diff --git a/libddekit/resources.c b/libddekit/resources.c
new file mode 100644
index 00000000..45704378
--- /dev/null
+++ b/libddekit/resources.c
@@ -0,0 +1,125 @@
+#include <stdlib.h>
+#include <error.h>
+#include <sys/io.h>
+#include <mach.h>
+#include <hurd.h>
+#include <device/device.h>
+
+#include "ddekit/resources.h"
+
+#include "config.h"
+
+int ddekit_request_dma(int nr) {
+#if 0
+	return l4io_request_dma(nr);
+#endif
+	return -1;
+}
+
+int ddekit_release_dma(int nr) {
+#if 0
+	return l4io_release_dma(nr);
+#endif
+	return -1;
+}
+
+/** Request an IO region
+ *
+ * \return 0 	success
+ * \return -1   error
+ */
+int ddekit_request_io(ddekit_addr_t start, ddekit_addr_t count) {
+	return ioperm (start, count, 1);
+}
+
+/** Release an IO region.
+ *
+ * \return 0 	success
+ * \return <0   error
+ */
+int ddekit_release_io(ddekit_addr_t start, ddekit_addr_t count) {
+	return ioperm (start, count, 0);
+}
+
+/* Get a memory object for the whole physical address space. */
+static memory_object_t get_physmem_object(void)
+{
+	mach_port_t master_device_port;
+	mach_port_t iopl_dev;
+	memory_object_t obj;
+	kern_return_t err;
+
+	/* first open master device port */
+	err = get_privileged_ports(NULL, &master_device_port);
+	if (err)
+		error(2, err, "get_physmem_object() can't get master device port");
+
+	/* now use it to open iopl device */
+	err = device_open(master_device_port, VM_PROT_READ | VM_PROT_WRITE, "mem", &iopl_dev);
+	if (err)
+		error(2, err, "get_physmem_object() can't open iopl device");
+
+	mach_port_deallocate(mach_task_self(), master_device_port);
+
+	/* now use that to get a memory object for the physical address space */
+	err = device_map(iopl_dev, D_READ|D_WRITE, 0, ~0, &obj, 0);
+	if (err)
+		error(2, err, "get_physmem_object() can't obtain memory object");
+
+	mach_port_deallocate(mach_task_self(), iopl_dev);
+
+	return obj;
+}
+
+/** Request a memory region.
+ *
+ * \return vaddr virtual address of memory region
+ * \return 0	 success
+ * \return -1	 error
+ */
+int ddekit_request_mem(ddekit_addr_t start, ddekit_addr_t count, ddekit_addr_t *vaddr) {
+	memory_object_t iopl_mem;
+	kern_return_t err;
+	*vaddr = 0;
+
+	iopl_mem = get_physmem_object();
+
+	err = vm_map(mach_task_self(),
+		     (vm_address_t *) vaddr,
+		     count,
+		     0,     /* mask */
+		     1,  /* anywhere */
+		     iopl_mem,
+		     (vm_offset_t)start,
+		     0, /* copy on write */
+		     VM_PROT_READ|VM_PROT_WRITE,
+		     VM_PROT_READ|VM_PROT_WRITE,
+		     VM_INHERIT_SHARE);
+	mach_port_deallocate(mach_task_self(),iopl_mem);
+	if( err )
+	{
+		error(0, err, "mmio_map(): can't vm_map");
+		return -1;
+	}
+	return 0;
+}
+
+/** Release memory region.
+ *
+ * \return 0 success
+ * \return <0 error
+ */
+int ddekit_release_mem(ddekit_addr_t start, ddekit_addr_t count) {
+	kern_return_t err = vm_deallocate(mach_task_self(), start, count);
+	if( err )
+	{
+		error(0, err, "mmio_unmap(): can't dealloc mmio space");
+		return -1;
+	}
+	return 0;
+}
+
+long ddekit_random ()
+{
+	return random ();
+}