patch-2.2.17 linux/arch/sparc64/kernel/psycho.c

• Lines: 28
• Date: Mon Sep 4 18:39:16 2000
• Orig file: v2.2.16/arch/sparc64/kernel/psycho.c
• Orig date: Mon Sep 4 18:37:51 2000

diff -u --recursive --new-file v2.2.16/arch/sparc64/kernel/psycho.c linux/arch/sparc64/kernel/psycho.c
@@ -1,4 +1,4 @@
-/* $Id: psycho.c,v 1.85.2.9 2000/05/01 06:33:49 davem Exp $
+/* $Id: psycho.c,v 1.85.2.10 2000/06/14 07:41:19 davem Exp $
  * psycho.c: Ultra/AX U2P PCI controller support.
  *
  * Copyright (C) 1997 David S. Miller (davem@caipfs.rutgers.edu)
@@ -37,6 +37,12 @@
 unsigned long pci_dvma_v2p_hash[PCI_DVMA_HASHSZ];
 unsigned long pci_dvma_p2v_hash[PCI_DVMA_HASHSZ];
 
+/* If this is non-NULL it points to Sabre's DMA write-sync register
+ * which is used by drivers of devices behind bridges other than APB
+ * to synchronize DMA write streams with interrupt delivery.
+ */
+volatile u64 *pci_dma_wsync = NULL;
+
 #ifndef CONFIG_PCI
 
 int pcibios_present(void)
@@ -299,6 +305,8 @@
 		prom_printf("SABRE: Error, cannot map SABRE main registers.\n");
 		prom_halt();
 	}
+
+	pci_dma_wsync = &sabre->psycho_regs->pci_dma_wsync;
 
 	printk("PCI: Found SABRE, main regs at %p CTRL[%016lx]\n",
 	       sabre->psycho_regs, sabre->psycho_regs->control);