patch-2.4.19 linux-2.4.19/arch/ia64/sn/io/sn2/pcibr/pcibr_config.c

• Lines: 168
• Date: Fri Aug 2 17:39:43 2002
• Orig file: linux-2.4.18/arch/ia64/sn/io/sn2/pcibr/pcibr_config.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.18/arch/ia64/sn/io/sn2/pcibr/pcibr_config.c linux-2.4.19/arch/ia64/sn/io/sn2/pcibr/pcibr_config.c
@@ -0,0 +1,167 @@
+/*
+ *
+ * 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.
+ *
+ * Copyright (C) 2001-2002 Silicon Graphics, Inc. All rights reserved.
+ */
+
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <asm/sn/sgi.h>
+#include <asm/sn/sn_cpuid.h>
+#include <asm/sn/addrs.h>
+#include <asm/sn/arch.h>
+#include <asm/sn/iograph.h>
+#include <asm/sn/invent.h>
+#include <asm/sn/hcl.h>
+#include <asm/sn/labelcl.h>
+#include <asm/sn/xtalk/xwidget.h>
+#include <asm/sn/pci/bridge.h>
+#include <asm/sn/pci/pciio.h>
+#include <asm/sn/pci/pcibr.h>
+#include <asm/sn/pci/pcibr_private.h>
+#include <asm/sn/pci/pci_defs.h>
+#include <asm/sn/prio.h>
+#include <asm/sn/xtalk/xbow.h>
+#include <asm/sn/ioc3.h>
+#include <asm/sn/eeprom.h>
+#include <asm/sn/io.h>
+#include <asm/sn/sn_private.h>
+
+extern pcibr_info_t      pcibr_info_get(devfs_handle_t);
+
+uint64_t          pcibr_config_get(devfs_handle_t, unsigned, unsigned);
+uint64_t          do_pcibr_config_get(cfg_p, unsigned, unsigned);
+void              pcibr_config_set(devfs_handle_t, unsigned, unsigned, uint64_t);
+void              do_pcibr_config_set(cfg_p, unsigned, unsigned, uint64_t);
+
+#ifdef LITTLE_ENDIAN
+#ifdef CONFIG_IA64_SGI_SN1
+/*
+ * on sn-ia we need to twiddle the the addresses going out
+ * the pci bus because we use the unswizzled synergy space
+ * (the alternative is to use the swizzled synergy space
+ * and byte swap the data)
+ */
+#define CB(b,r) (((volatile uint8_t *) b)[((r)^4)])
+#define CS(b,r) (((volatile uint16_t *) b)[((r^4)/2)])
+#define CW(b,r) (((volatile uint32_t *) b)[((r^4)/4)])
+#else
+#ifdef CONFIG_IA64_SGI_SN2
+/*
+ * On sn-ia sn2 everything is little endian.  No swizzling 
+ * or byte swapping of addresses required.
+ */
+#define CB(b,r) (((volatile uint8_t *) b)[(r)])
+#define CS(b,r) (((volatile uint16_t *) b)[(r)/2])
+#define CW(b,r) (((volatile uint32_t *) b)[(r)/4])
+#endif
+#endif
+#else
+#define	CB(b,r)	(((volatile uint8_t *) cfgbase)[(r)^3])
+#define	CS(b,r)	(((volatile uint16_t *) cfgbase)[((r)/2)^1])
+#define	CW(b,r)	(((volatile uint32_t *) cfgbase)[(r)/4])
+#endif
+
+
+cfg_p
+pcibr_config_addr(devfs_handle_t conn,
+		  unsigned reg)
+{
+    pcibr_info_t            pcibr_info;
+    pciio_slot_t            pciio_slot;
+    pciio_function_t        pciio_func;
+    pcibr_soft_t            pcibr_soft;
+    bridge_t               *bridge;
+    cfg_p                   cfgbase = (cfg_p)0;
+
+    pcibr_info = pcibr_info_get(conn);
+
+    pciio_slot = pcibr_info->f_slot;
+    if (pciio_slot == PCIIO_SLOT_NONE)
+	pciio_slot = PCI_TYPE1_SLOT(reg);
+
+    pciio_func = pcibr_info->f_func;
+    if (pciio_func == PCIIO_FUNC_NONE)
+	pciio_func = PCI_TYPE1_FUNC(reg);
+
+    pcibr_soft = (pcibr_soft_t) pcibr_info->f_mfast;
+
+    bridge = pcibr_soft->bs_base;
+
+    cfgbase = bridge->b_type0_cfg_dev[pciio_slot].f[pciio_func].l;
+
+    return cfgbase;
+}
+
+uint64_t
+pcibr_config_get(devfs_handle_t conn,
+		 unsigned reg,
+		 unsigned size)
+{
+    return do_pcibr_config_get(pcibr_config_addr(conn, reg),
+			       PCI_TYPE1_REG(reg), size);
+}
+
+uint64_t
+do_pcibr_config_get(
+		       cfg_p cfgbase,
+		       unsigned reg,
+		       unsigned size)
+{
+    unsigned                value;
+
+    value = CW(cfgbase, reg);
+
+    if (reg & 3)
+	value >>= 8 * (reg & 3);
+    if (size < 4)
+	value &= (1 << (8 * size)) - 1;
+    return value;
+}
+
+void
+pcibr_config_set(devfs_handle_t conn,
+		 unsigned reg,
+		 unsigned size,
+		 uint64_t value)
+{
+    do_pcibr_config_set(pcibr_config_addr(conn, reg),
+			PCI_TYPE1_REG(reg), size, value);
+}
+
+void
+do_pcibr_config_set(cfg_p cfgbase,
+		    unsigned reg,
+		    unsigned size,
+		    uint64_t value)
+{
+    switch (size) {
+    case 1:
+	CB(cfgbase, reg) = value;
+	break;
+    case 2:
+	if (reg & 1) {
+	    CB(cfgbase, reg) = value;
+	    CB(cfgbase, reg + 1) = value >> 8;
+	} else
+	    CS(cfgbase, reg) = value;
+	break;
+    case 3:
+	if (reg & 1) {
+	    CB(cfgbase, reg) = value;
+	    CS(cfgbase, (reg + 1)) = value >> 8;
+	} else {
+	    CS(cfgbase, reg) = value;
+	    CB(cfgbase, reg + 2) = value >> 16;
+	}
+	break;
+
+    case 4:
+	CW(cfgbase, reg) = value;
+	break;
+    }
+}