Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/arch/sh/drivers/pci/dma-dreamcast.c b/arch/sh/drivers/pci/dma-dreamcast.c
new file mode 100644
index 0000000..83de7ef
--- /dev/null
+++ b/arch/sh/drivers/pci/dma-dreamcast.c
@@ -0,0 +1,71 @@
+/*
+ * arch/sh/pci/dma-dreamcast.c
+ *
+ * PCI DMA support for the Sega Dreamcast
+ *
+ * Copyright (C) 2001, 2002 M. R. Brown
+ * Copyright (C) 2002, 2003 Paul Mundt
+ *
+ * This file originally bore the message (with enclosed-$):
+ * Id: pci.c,v 1.3 2003/05/04 19:29:46 lethal Exp
+ * Dreamcast PCI: Supports SEGA Broadband Adaptor only.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/config.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/param.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <linux/pci.h>
+#include <linux/dma-mapping.h>
+#include <linux/device.h>
+
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/mach/pci.h>
+
+static int gapspci_dma_used = 0;
+
+void *dreamcast_consistent_alloc(struct device *dev, size_t size,
+ dma_addr_t *dma_handle, int flag)
+{
+ unsigned long buf;
+
+ if (dev && dev->bus != &pci_bus_type)
+ return NULL;
+
+ if (gapspci_dma_used + size > GAPSPCI_DMA_SIZE)
+ return ERR_PTR(-EINVAL);
+
+ buf = GAPSPCI_DMA_BASE + gapspci_dma_used;
+
+ gapspci_dma_used = PAGE_ALIGN(gapspci_dma_used+size);
+
+ *dma_handle = (dma_addr_t)buf;
+
+ buf = P2SEGADDR(buf);
+
+ /* Flush the dcache before we hand off the buffer */
+ dma_cache_wback_inv((void *)buf, size);
+
+ return (void *)buf;
+}
+
+int dreamcast_consistent_free(struct device *dev, size_t size,
+ void *vaddr, dma_addr_t dma_handle)
+{
+ if (dev && dev->bus != &pci_bus_type)
+ return -EINVAL;
+
+ /* XXX */
+ gapspci_dma_used = 0;
+
+ return 0;
+}
+