i386: prepare shared pci/mmconfig.c

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 0 insertions, 148 deletions

diff --git a/arch/i386/pci/mmconfig.c b/arch/i386/pci/mmconfig.c
deleted file mode 100644
index 1bf5816d34c..00000000000
--- a/arch/i386/pci/mmconfig.c
+++ /dev/null
@@ -1,148 +0,0 @@
-/*
- * Copyright (C) 2004 Matthew Wilcox <matthew@wil.cx>
- * Copyright (C) 2004 Intel Corp.
- *
- * This code is released under the GNU General Public License version 2.
- */
-
-/*
- * mmconfig.c - Low-level direct PCI config space access via MMCONFIG
- */
-
-#include <linux/pci.h>
-#include <linux/init.h>
-#include <linux/acpi.h>
-#include <asm/e820.h>
-#include "pci.h"
-
-/* Assume systems with more busses have correct MCFG */
-#define mmcfg_virt_addr ((void __iomem *) fix_to_virt(FIX_PCIE_MCFG))
-
-/* The base address of the last MMCONFIG device accessed */
-static u32 mmcfg_last_accessed_device;
-static int mmcfg_last_accessed_cpu;
-
-/*
- * Functions for accessing PCI configuration space with MMCONFIG accesses
- */
-static u32 get_base_addr(unsigned int seg, int bus, unsigned devfn)
-{
-	struct acpi_mcfg_allocation *cfg;
-	int cfg_num;
-
-	if (seg == 0 && bus < PCI_MMCFG_MAX_CHECK_BUS &&
-	    test_bit(PCI_SLOT(devfn) + 32*bus, pci_mmcfg_fallback_slots))
-		return 0;
-
-	for (cfg_num = 0; cfg_num < pci_mmcfg_config_num; cfg_num++) {
-		cfg = &pci_mmcfg_config[cfg_num];
-		if (cfg->pci_segment == seg &&
-		    (cfg->start_bus_number <= bus) &&
-		    (cfg->end_bus_number >= bus))
-			return cfg->address;
-	}
-
-	/* Fall back to type 0 */
-	return 0;
-}
-
-/*
- * This is always called under pci_config_lock
- */
-static void pci_exp_set_dev_base(unsigned int base, int bus, int devfn)
-{
-	u32 dev_base = base | (bus << 20) | (devfn << 12);
-	int cpu = smp_processor_id();
-	if (dev_base != mmcfg_last_accessed_device ||
-	    cpu != mmcfg_last_accessed_cpu) {
-		mmcfg_last_accessed_device = dev_base;
-		mmcfg_last_accessed_cpu = cpu;
-		set_fixmap_nocache(FIX_PCIE_MCFG, dev_base);
-	}
-}
-
-static int pci_mmcfg_read(unsigned int seg, unsigned int bus,
-			  unsigned int devfn, int reg, int len, u32 *value)
-{
-	unsigned long flags;
-	u32 base;
-
-	if ((bus > 255) || (devfn > 255) || (reg > 4095)) {
-		*value = -1;
-		return -EINVAL;
-	}
-
-	base = get_base_addr(seg, bus, devfn);
-	if (!base)
-		return pci_conf1_read(seg,bus,devfn,reg,len,value);
-
-	spin_lock_irqsave(&pci_config_lock, flags);
-
-	pci_exp_set_dev_base(base, bus, devfn);
-
-	switch (len) {
-	case 1:
-		*value = mmio_config_readb(mmcfg_virt_addr + reg);
-		break;
-	case 2:
-		*value = mmio_config_readw(mmcfg_virt_addr + reg);
-		break;
-	case 4:
-		*value = mmio_config_readl(mmcfg_virt_addr + reg);
-		break;
-	}
-	spin_unlock_irqrestore(&pci_config_lock, flags);
-
-	return 0;
-}
-
-static int pci_mmcfg_write(unsigned int seg, unsigned int bus,
-			   unsigned int devfn, int reg, int len, u32 value)
-{
-	unsigned long flags;
-	u32 base;
-
-	if ((bus > 255) || (devfn > 255) || (reg > 4095))
-		return -EINVAL;
-
-	base = get_base_addr(seg, bus, devfn);
-	if (!base)
-		return pci_conf1_write(seg,bus,devfn,reg,len,value);
-
-	spin_lock_irqsave(&pci_config_lock, flags);
-
-	pci_exp_set_dev_base(base, bus, devfn);
-
-	switch (len) {
-	case 1:
-		mmio_config_writeb(mmcfg_virt_addr + reg, value);
-		break;
-	case 2:
-		mmio_config_writew(mmcfg_virt_addr + reg, value);
-		break;
-	case 4:
-		mmio_config_writel(mmcfg_virt_addr + reg, value);
-		break;
-	}
-	spin_unlock_irqrestore(&pci_config_lock, flags);
-
-	return 0;
-}
-
-static struct pci_raw_ops pci_mmcfg = {
-	.read =		pci_mmcfg_read,
-	.write =	pci_mmcfg_write,
-};
-
-int __init pci_mmcfg_arch_reachable(unsigned int seg, unsigned int bus,
-				    unsigned int devfn)
-{
-	return get_base_addr(seg, bus, devfn) != 0;
-}
-
-int __init pci_mmcfg_arch_init(void)
-{
-	printk(KERN_INFO "PCI: Using MMCONFIG\n");
-	raw_pci_ops = &pci_mmcfg;
-	return 1;
-}