From 041d1ea37802bf7178a31a53f96c26efa6b8fb7b Mon Sep 17 00:00:00 2001
From: James <james.mckenzie@citrix.com>
Date: Fri, 16 Nov 2012 10:41:01 +0000
Subject: fish

---
 grub-core/bus/pci.c | 137 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 137 insertions(+)
 create mode 100644 grub-core/bus/pci.c

(limited to 'grub-core/bus/pci.c')

diff --git a/grub-core/bus/pci.c b/grub-core/bus/pci.c
new file mode 100644
index 0000000..766b6d7
--- /dev/null
+++ b/grub-core/bus/pci.c
@@ -0,0 +1,137 @@
+/* pci.c - Generic PCI interfaces.  */
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2007,2009  Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/dl.h>
+#include <grub/pci.h>
+#include <grub/mm.h>
+#include <grub/mm_private.h>
+#include <grub/cache.h>
+
+GRUB_MOD_LICENSE ("GPLv3+");
+
+/* FIXME: correctly support 64-bit architectures.  */
+/* #if GRUB_TARGET_SIZEOF_VOID_P == 4 */
+struct grub_pci_dma_chunk *
+grub_memalign_dma32 (grub_size_t align, grub_size_t size)
+{
+  void *ret = grub_memalign (align, size);
+  if (!ret)
+    return 0;
+  grub_arch_sync_dma_caches (ret, size);
+  return ret;
+}
+
+/* FIXME: evil.  */
+void
+grub_dma_free (struct grub_pci_dma_chunk *ch)
+{
+  grub_size_t size = (((struct grub_mm_header *) ch) - 1)->size * GRUB_MM_ALIGN;
+  grub_arch_sync_dma_caches (ch, size);
+  grub_free (ch);
+}
+/* #endif */
+
+#ifdef GRUB_MACHINE_MIPS_YEELOONG
+volatile void *
+grub_dma_get_virt (struct grub_pci_dma_chunk *ch)
+{
+  return (void *) ((((grub_uint32_t) ch) & 0x1fffffff) | 0xa0000000);
+}
+
+grub_uint32_t
+grub_dma_get_phys (struct grub_pci_dma_chunk *ch)
+{
+  return (((grub_uint32_t) ch) & 0x1fffffff) | 0x80000000;
+}
+#else
+
+volatile void *
+grub_dma_get_virt (struct grub_pci_dma_chunk *ch)
+{
+  return (void *) ch;
+}
+
+grub_uint32_t
+grub_dma_get_phys (struct grub_pci_dma_chunk *ch)
+{
+  return (grub_uint32_t) (grub_addr_t) ch;
+}
+
+#endif
+
+grub_pci_address_t
+grub_pci_make_address (grub_pci_device_t dev, int reg)
+{
+  return (1 << 31) | (dev.bus << 16) | (dev.device << 11)
+    | (dev.function << 8) | reg;
+}
+
+void
+grub_pci_iterate (grub_pci_iteratefunc_t hook)
+{
+  grub_pci_device_t dev;
+  grub_pci_address_t addr;
+  grub_pci_id_t id;
+  grub_uint32_t hdr;
+
+  for (dev.bus = 0; dev.bus < GRUB_PCI_NUM_BUS; dev.bus++)
+    {
+      for (dev.device = 0; dev.device < GRUB_PCI_NUM_DEVICES; dev.device++)
+	{
+	  for (dev.function = 0; dev.function < 8; dev.function++)
+	    {
+	      addr = grub_pci_make_address (dev, GRUB_PCI_REG_PCI_ID);
+	      id = grub_pci_read (addr);
+
+	      /* Check if there is a device present.  */
+	      if (id >> 16 == 0xFFFF)
+		{
+		  if (dev.function == 0)
+		    /* Devices are required to implement function 0, so if
+		       it's missing then there is no device here.  */
+		    break;
+		  else
+		    continue;
+		}
+
+#ifdef GRUB_MACHINE_MIPS_YEELOONG
+	      /* Skip ghosts.  */
+	      if (id == GRUB_YEELOONG_OHCI_PCIID
+		  && dev.function == GRUB_YEELOONG_OHCI_GHOST_FUNCTION)
+		continue;
+	      if (id == GRUB_YEELOONG_EHCI_PCIID
+		  && dev.function == GRUB_YEELOONG_EHCI_GHOST_FUNCTION)
+		continue;
+#endif
+
+	      if (hook (dev, id))
+		return;
+
+	      /* Probe only func = 0 if the device if not multifunction */
+	      if (dev.function == 0)
+		{
+		  addr = grub_pci_make_address (dev, GRUB_PCI_REG_CACHELINE);
+		  hdr = grub_pci_read (addr);
+		  if (!(hdr & 0x800000))
+		    break;
+		}
+	    }
+	}
+    }
+}
-- 
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