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/arm/mach-integrator/pci_v3.c b/arch/arm/mach-integrator/pci_v3.c
new file mode 100644
index 0000000..229a63a
--- /dev/null
+++ b/arch/arm/mach-integrator/pci_v3.c
@@ -0,0 +1,604 @@
+/*
+ * linux/arch/arm/mach-integrator/pci_v3.c
+ *
+ * PCI functions for V3 host PCI bridge
+ *
+ * Copyright (C) 1999 ARM Limited
+ * Copyright (C) 2000-2001 Deep Blue Solutions Ltd
+ *
+ * This program 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/ptrace.h>
+#include <linux/slab.h>
+#include <linux/ioport.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+#include <linux/init.h>
+
+#include <asm/hardware.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/system.h>
+#include <asm/mach/pci.h>
+
+#include <asm/hardware/pci_v3.h>
+
+/*
+ * The V3 PCI interface chip in Integrator provides several windows from
+ * local bus memory into the PCI memory areas. Unfortunately, there
+ * are not really enough windows for our usage, therefore we reuse
+ * one of the windows for access to PCI configuration space. The
+ * memory map is as follows:
+ *
+ * Local Bus Memory Usage
+ *
+ * 40000000 - 4FFFFFFF PCI memory. 256M non-prefetchable
+ * 50000000 - 5FFFFFFF PCI memory. 256M prefetchable
+ * 60000000 - 60FFFFFF PCI IO. 16M
+ * 61000000 - 61FFFFFF PCI Configuration. 16M
+ *
+ * There are three V3 windows, each described by a pair of V3 registers.
+ * These are LB_BASE0/LB_MAP0, LB_BASE1/LB_MAP1 and LB_BASE2/LB_MAP2.
+ * Base0 and Base1 can be used for any type of PCI memory access. Base2
+ * can be used either for PCI I/O or for I20 accesses. By default, uHAL
+ * uses this only for PCI IO space.
+ *
+ * Normally these spaces are mapped using the following base registers:
+ *
+ * Usage Local Bus Memory Base/Map registers used
+ *
+ * Mem 40000000 - 4FFFFFFF LB_BASE0/LB_MAP0
+ * Mem 50000000 - 5FFFFFFF LB_BASE1/LB_MAP1
+ * IO 60000000 - 60FFFFFF LB_BASE2/LB_MAP2
+ * Cfg 61000000 - 61FFFFFF
+ *
+ * This means that I20 and PCI configuration space accesses will fail.
+ * When PCI configuration accesses are needed (via the uHAL PCI
+ * configuration space primitives) we must remap the spaces as follows:
+ *
+ * Usage Local Bus Memory Base/Map registers used
+ *
+ * Mem 40000000 - 4FFFFFFF LB_BASE0/LB_MAP0
+ * Mem 50000000 - 5FFFFFFF LB_BASE0/LB_MAP0
+ * IO 60000000 - 60FFFFFF LB_BASE2/LB_MAP2
+ * Cfg 61000000 - 61FFFFFF LB_BASE1/LB_MAP1
+ *
+ * To make this work, the code depends on overlapping windows working.
+ * The V3 chip translates an address by checking its range within
+ * each of the BASE/MAP pairs in turn (in ascending register number
+ * order). It will use the first matching pair. So, for example,
+ * if the same address is mapped by both LB_BASE0/LB_MAP0 and
+ * LB_BASE1/LB_MAP1, the V3 will use the translation from
+ * LB_BASE0/LB_MAP0.
+ *
+ * To allow PCI Configuration space access, the code enlarges the
+ * window mapped by LB_BASE0/LB_MAP0 from 256M to 512M. This occludes
+ * the windows currently mapped by LB_BASE1/LB_MAP1 so that it can
+ * be remapped for use by configuration cycles.
+ *
+ * At the end of the PCI Configuration space accesses,
+ * LB_BASE1/LB_MAP1 is reset to map PCI Memory. Finally the window
+ * mapped by LB_BASE0/LB_MAP0 is reduced in size from 512M to 256M to
+ * reveal the now restored LB_BASE1/LB_MAP1 window.
+ *
+ * NOTE: We do not set up I2O mapping. I suspect that this is only
+ * for an intelligent (target) device. Using I2O disables most of
+ * the mappings into PCI memory.
+ */
+
+// V3 access routines
+#define v3_writeb(o,v) __raw_writeb(v, PCI_V3_VADDR + (unsigned int)(o))
+#define v3_readb(o) (__raw_readb(PCI_V3_VADDR + (unsigned int)(o)))
+
+#define v3_writew(o,v) __raw_writew(v, PCI_V3_VADDR + (unsigned int)(o))
+#define v3_readw(o) (__raw_readw(PCI_V3_VADDR + (unsigned int)(o)))
+
+#define v3_writel(o,v) __raw_writel(v, PCI_V3_VADDR + (unsigned int)(o))
+#define v3_readl(o) (__raw_readl(PCI_V3_VADDR + (unsigned int)(o)))
+
+/*============================================================================
+ *
+ * routine: uHALir_PCIMakeConfigAddress()
+ *
+ * parameters: bus = which bus
+ * device = which device
+ * function = which function
+ * offset = configuration space register we are interested in
+ *
+ * description: this routine will generate a platform dependent config
+ * address.
+ *
+ * calls: none
+ *
+ * returns: configuration address to play on the PCI bus
+ *
+ * To generate the appropriate PCI configuration cycles in the PCI
+ * configuration address space, you present the V3 with the following pattern
+ * (which is very nearly a type 1 (except that the lower two bits are 00 and
+ * not 01). In order for this mapping to work you need to set up one of
+ * the local to PCI aperatures to 16Mbytes in length translating to
+ * PCI configuration space starting at 0x0000.0000.
+ *
+ * PCI configuration cycles look like this:
+ *
+ * Type 0:
+ *
+ * 3 3|3 3 2 2|2 2 2 2|2 2 2 2|1 1 1 1|1 1 1 1|1 1
+ * 3 2|1 0 9 8|7 6 5 4|3 2 1 0|9 8 7 6|5 4 3 2|1 0 9 8|7 6 5 4|3 2 1 0
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | | |D|D|D|D|D|D|D|D|D|D|D|D|D|D|D|D|D|D|D|D|D|F|F|F|R|R|R|R|R|R|0|0|
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *
+ * 31:11 Device select bit.
+ * 10:8 Function number
+ * 7:2 Register number
+ *
+ * Type 1:
+ *
+ * 3 3|3 3 2 2|2 2 2 2|2 2 2 2|1 1 1 1|1 1 1 1|1 1
+ * 3 2|1 0 9 8|7 6 5 4|3 2 1 0|9 8 7 6|5 4 3 2|1 0 9 8|7 6 5 4|3 2 1 0
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | | | | | | | | | | |B|B|B|B|B|B|B|B|D|D|D|D|D|F|F|F|R|R|R|R|R|R|0|1|
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *
+ * 31:24 reserved
+ * 23:16 bus number (8 bits = 128 possible buses)
+ * 15:11 Device number (5 bits)
+ * 10:8 function number
+ * 7:2 register number
+ *
+ */
+static DEFINE_SPINLOCK(v3_lock);
+
+#define PCI_BUS_NONMEM_START 0x00000000
+#define PCI_BUS_NONMEM_SIZE SZ_256M
+
+#define PCI_BUS_PREMEM_START PCI_BUS_NONMEM_START + PCI_BUS_NONMEM_SIZE
+#define PCI_BUS_PREMEM_SIZE SZ_256M
+
+#if PCI_BUS_NONMEM_START & 0x000fffff
+#error PCI_BUS_NONMEM_START must be megabyte aligned
+#endif
+#if PCI_BUS_PREMEM_START & 0x000fffff
+#error PCI_BUS_PREMEM_START must be megabyte aligned
+#endif
+
+#undef V3_LB_BASE_PREFETCH
+#define V3_LB_BASE_PREFETCH 0
+
+static unsigned long v3_open_config_window(struct pci_bus *bus,
+ unsigned int devfn, int offset)
+{
+ unsigned int address, mapaddress, busnr;
+
+ busnr = bus->number;
+
+ /*
+ * Trap out illegal values
+ */
+ if (offset > 255)
+ BUG();
+ if (busnr > 255)
+ BUG();
+ if (devfn > 255)
+ BUG();
+
+ if (busnr == 0) {
+ int slot = PCI_SLOT(devfn);
+
+ /*
+ * local bus segment so need a type 0 config cycle
+ *
+ * build the PCI configuration "address" with one-hot in
+ * A31-A11
+ *
+ * mapaddress:
+ * 3:1 = config cycle (101)
+ * 0 = PCI A1 & A0 are 0 (0)
+ */
+ address = PCI_FUNC(devfn) << 8;
+ mapaddress = V3_LB_MAP_TYPE_CONFIG;
+
+ if (slot > 12)
+ /*
+ * high order bits are handled by the MAP register
+ */
+ mapaddress |= 1 << (slot - 5);
+ else
+ /*
+ * low order bits handled directly in the address
+ */
+ address |= 1 << (slot + 11);
+ } else {
+ /*
+ * not the local bus segment so need a type 1 config cycle
+ *
+ * address:
+ * 23:16 = bus number
+ * 15:11 = slot number (7:3 of devfn)
+ * 10:8 = func number (2:0 of devfn)
+ *
+ * mapaddress:
+ * 3:1 = config cycle (101)
+ * 0 = PCI A1 & A0 from host bus (1)
+ */
+ mapaddress = V3_LB_MAP_TYPE_CONFIG | V3_LB_MAP_AD_LOW_EN;
+ address = (busnr << 16) | (devfn << 8);
+ }
+
+ /*
+ * Set up base0 to see all 512Mbytes of memory space (not
+ * prefetchable), this frees up base1 for re-use by
+ * configuration memory
+ */
+ v3_writel(V3_LB_BASE0, v3_addr_to_lb_base(PHYS_PCI_MEM_BASE) |
+ V3_LB_BASE_ADR_SIZE_512MB | V3_LB_BASE_ENABLE);
+
+ /*
+ * Set up base1/map1 to point into configuration space.
+ */
+ v3_writel(V3_LB_BASE1, v3_addr_to_lb_base(PHYS_PCI_CONFIG_BASE) |
+ V3_LB_BASE_ADR_SIZE_16MB | V3_LB_BASE_ENABLE);
+ v3_writew(V3_LB_MAP1, mapaddress);
+
+ return PCI_CONFIG_VADDR + address + offset;
+}
+
+static void v3_close_config_window(void)
+{
+ /*
+ * Reassign base1 for use by prefetchable PCI memory
+ */
+ v3_writel(V3_LB_BASE1, v3_addr_to_lb_base(PHYS_PCI_MEM_BASE + SZ_256M) |
+ V3_LB_BASE_ADR_SIZE_256MB | V3_LB_BASE_PREFETCH |
+ V3_LB_BASE_ENABLE);
+ v3_writew(V3_LB_MAP1, v3_addr_to_lb_map(PCI_BUS_PREMEM_START) |
+ V3_LB_MAP_TYPE_MEM_MULTIPLE);
+
+ /*
+ * And shrink base0 back to a 256M window (NOTE: MAP0 already correct)
+ */
+ v3_writel(V3_LB_BASE0, v3_addr_to_lb_base(PHYS_PCI_MEM_BASE) |
+ V3_LB_BASE_ADR_SIZE_256MB | V3_LB_BASE_ENABLE);
+}
+
+static int v3_read_config(struct pci_bus *bus, unsigned int devfn, int where,
+ int size, u32 *val)
+{
+ unsigned long addr;
+ unsigned long flags;
+ u32 v;
+
+ spin_lock_irqsave(&v3_lock, flags);
+ addr = v3_open_config_window(bus, devfn, where);
+
+ switch (size) {
+ case 1:
+ v = __raw_readb(addr);
+ break;
+
+ case 2:
+ v = __raw_readw(addr);
+ break;
+
+ default:
+ v = __raw_readl(addr);
+ break;
+ }
+
+ v3_close_config_window();
+ spin_unlock_irqrestore(&v3_lock, flags);
+
+ *val = v;
+ return PCIBIOS_SUCCESSFUL;
+}
+
+static int v3_write_config(struct pci_bus *bus, unsigned int devfn, int where,
+ int size, u32 val)
+{
+ unsigned long addr;
+ unsigned long flags;
+
+ spin_lock_irqsave(&v3_lock, flags);
+ addr = v3_open_config_window(bus, devfn, where);
+
+ switch (size) {
+ case 1:
+ __raw_writeb((u8)val, addr);
+ __raw_readb(addr);
+ break;
+
+ case 2:
+ __raw_writew((u16)val, addr);
+ __raw_readw(addr);
+ break;
+
+ case 4:
+ __raw_writel(val, addr);
+ __raw_readl(addr);
+ break;
+ }
+
+ v3_close_config_window();
+ spin_unlock_irqrestore(&v3_lock, flags);
+
+ return PCIBIOS_SUCCESSFUL;
+}
+
+static struct pci_ops pci_v3_ops = {
+ .read = v3_read_config,
+ .write = v3_write_config,
+};
+
+static struct resource non_mem = {
+ .name = "PCI non-prefetchable",
+ .start = PHYS_PCI_MEM_BASE + PCI_BUS_NONMEM_START,
+ .end = PHYS_PCI_MEM_BASE + PCI_BUS_NONMEM_START + PCI_BUS_NONMEM_SIZE - 1,
+ .flags = IORESOURCE_MEM,
+};
+
+static struct resource pre_mem = {
+ .name = "PCI prefetchable",
+ .start = PHYS_PCI_MEM_BASE + PCI_BUS_PREMEM_START,
+ .end = PHYS_PCI_MEM_BASE + PCI_BUS_PREMEM_START + PCI_BUS_PREMEM_SIZE - 1,
+ .flags = IORESOURCE_MEM | IORESOURCE_PREFETCH,
+};
+
+static int __init pci_v3_setup_resources(struct resource **resource)
+{
+ if (request_resource(&iomem_resource, &non_mem)) {
+ printk(KERN_ERR "PCI: unable to allocate non-prefetchable "
+ "memory region\n");
+ return -EBUSY;
+ }
+ if (request_resource(&iomem_resource, &pre_mem)) {
+ release_resource(&non_mem);
+ printk(KERN_ERR "PCI: unable to allocate prefetchable "
+ "memory region\n");
+ return -EBUSY;
+ }
+
+ /*
+ * bus->resource[0] is the IO resource for this bus
+ * bus->resource[1] is the mem resource for this bus
+ * bus->resource[2] is the prefetch mem resource for this bus
+ */
+ resource[0] = &ioport_resource;
+ resource[1] = &non_mem;
+ resource[2] = &pre_mem;
+
+ return 1;
+}
+
+/*
+ * These don't seem to be implemented on the Integrator I have, which
+ * means I can't get additional information on the reason for the pm2fb
+ * problems. I suppose I'll just have to mind-meld with the machine. ;)
+ */
+#define SC_PCI (IO_ADDRESS(INTEGRATOR_SC_BASE) + INTEGRATOR_SC_PCIENABLE_OFFSET)
+#define SC_LBFADDR (IO_ADDRESS(INTEGRATOR_SC_BASE) + 0x20)
+#define SC_LBFCODE (IO_ADDRESS(INTEGRATOR_SC_BASE) + 0x24)
+
+static int
+v3_pci_fault(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
+{
+ unsigned long pc = instruction_pointer(regs);
+ unsigned long instr = *(unsigned long *)pc;
+#if 0
+ char buf[128];
+
+ sprintf(buf, "V3 fault: addr 0x%08lx, FSR 0x%03x, PC 0x%08lx [%08lx] LBFADDR=%08x LBFCODE=%02x ISTAT=%02x\n",
+ addr, fsr, pc, instr, __raw_readl(SC_LBFADDR), __raw_readl(SC_LBFCODE) & 255,
+ v3_readb(V3_LB_ISTAT));
+ printk(KERN_DEBUG "%s", buf);
+ printascii(buf);
+#endif
+
+ v3_writeb(V3_LB_ISTAT, 0);
+ __raw_writel(3, SC_PCI);
+
+ /*
+ * If the instruction being executed was a read,
+ * make it look like it read all-ones.
+ */
+ if ((instr & 0x0c100000) == 0x04100000) {
+ int reg = (instr >> 12) & 15;
+ unsigned long val;
+
+ if (instr & 0x00400000)
+ val = 255;
+ else
+ val = -1;
+
+ regs->uregs[reg] = val;
+ regs->ARM_pc += 4;
+ return 0;
+ }
+
+ if ((instr & 0x0e100090) == 0x00100090) {
+ int reg = (instr >> 12) & 15;
+
+ regs->uregs[reg] = -1;
+ regs->ARM_pc += 4;
+ return 0;
+ }
+
+ return 1;
+}
+
+static irqreturn_t v3_irq(int irq, void *devid, struct pt_regs *regs)
+{
+#ifdef CONFIG_DEBUG_LL
+ unsigned long pc = instruction_pointer(regs);
+ unsigned long instr = *(unsigned long *)pc;
+ char buf[128];
+
+ sprintf(buf, "V3 int %d: pc=0x%08lx [%08lx] LBFADDR=%08x LBFCODE=%02x ISTAT=%02x\n", irq,
+ pc, instr, __raw_readl(SC_LBFADDR), __raw_readl(SC_LBFCODE) & 255,
+ v3_readb(V3_LB_ISTAT));
+ printascii(buf);
+#endif
+
+ v3_writew(V3_PCI_STAT, 0xf000);
+ v3_writeb(V3_LB_ISTAT, 0);
+ __raw_writel(3, SC_PCI);
+
+#ifdef CONFIG_DEBUG_LL
+ /*
+ * If the instruction being executed was a read,
+ * make it look like it read all-ones.
+ */
+ if ((instr & 0x0c100000) == 0x04100000) {
+ int reg = (instr >> 16) & 15;
+ sprintf(buf, " reg%d = %08lx\n", reg, regs->uregs[reg]);
+ printascii(buf);
+ }
+#endif
+ return IRQ_HANDLED;
+}
+
+int __init pci_v3_setup(int nr, struct pci_sys_data *sys)
+{
+ int ret = 0;
+
+ if (nr == 0) {
+ sys->mem_offset = PHYS_PCI_MEM_BASE;
+ ret = pci_v3_setup_resources(sys->resource);
+ }
+
+ return ret;
+}
+
+struct pci_bus *pci_v3_scan_bus(int nr, struct pci_sys_data *sys)
+{
+ return pci_scan_bus(sys->busnr, &pci_v3_ops, sys);
+}
+
+/*
+ * V3_LB_BASE? - local bus address
+ * V3_LB_MAP? - pci bus address
+ */
+void __init pci_v3_preinit(void)
+{
+ unsigned long flags;
+ unsigned int temp;
+ int ret;
+
+ /*
+ * Hook in our fault handler for PCI errors
+ */
+ hook_fault_code(4, v3_pci_fault, SIGBUS, "external abort on linefetch");
+ hook_fault_code(6, v3_pci_fault, SIGBUS, "external abort on linefetch");
+ hook_fault_code(8, v3_pci_fault, SIGBUS, "external abort on non-linefetch");
+ hook_fault_code(10, v3_pci_fault, SIGBUS, "external abort on non-linefetch");
+
+ spin_lock_irqsave(&v3_lock, flags);
+
+ /*
+ * Unlock V3 registers, but only if they were previously locked.
+ */
+ if (v3_readw(V3_SYSTEM) & V3_SYSTEM_M_LOCK)
+ v3_writew(V3_SYSTEM, 0xa05f);
+
+ /*
+ * Setup window 0 - PCI non-prefetchable memory
+ * Local: 0x40000000 Bus: 0x00000000 Size: 256MB
+ */
+ v3_writel(V3_LB_BASE0, v3_addr_to_lb_base(PHYS_PCI_MEM_BASE) |
+ V3_LB_BASE_ADR_SIZE_256MB | V3_LB_BASE_ENABLE);
+ v3_writew(V3_LB_MAP0, v3_addr_to_lb_map(PCI_BUS_NONMEM_START) |
+ V3_LB_MAP_TYPE_MEM);
+
+ /*
+ * Setup window 1 - PCI prefetchable memory
+ * Local: 0x50000000 Bus: 0x10000000 Size: 256MB
+ */
+ v3_writel(V3_LB_BASE1, v3_addr_to_lb_base(PHYS_PCI_MEM_BASE + SZ_256M) |
+ V3_LB_BASE_ADR_SIZE_256MB | V3_LB_BASE_PREFETCH |
+ V3_LB_BASE_ENABLE);
+ v3_writew(V3_LB_MAP1, v3_addr_to_lb_map(PCI_BUS_PREMEM_START) |
+ V3_LB_MAP_TYPE_MEM_MULTIPLE);
+
+ /*
+ * Setup window 2 - PCI IO
+ */
+ v3_writel(V3_LB_BASE2, v3_addr_to_lb_base2(PHYS_PCI_IO_BASE) |
+ V3_LB_BASE_ENABLE);
+ v3_writew(V3_LB_MAP2, v3_addr_to_lb_map2(0));
+
+ /*
+ * Disable PCI to host IO cycles
+ */
+ temp = v3_readw(V3_PCI_CFG) & ~V3_PCI_CFG_M_I2O_EN;
+ temp |= V3_PCI_CFG_M_IO_REG_DIS | V3_PCI_CFG_M_IO_DIS;
+ v3_writew(V3_PCI_CFG, temp);
+
+ printk(KERN_DEBUG "FIFO_CFG: %04x FIFO_PRIO: %04x\n",
+ v3_readw(V3_FIFO_CFG), v3_readw(V3_FIFO_PRIORITY));
+
+ /*
+ * Set the V3 FIFO such that writes have higher priority than
+ * reads, and local bus write causes local bus read fifo flush.
+ * Same for PCI.
+ */
+ v3_writew(V3_FIFO_PRIORITY, 0x0a0a);
+
+ /*
+ * Re-lock the system register.
+ */
+ temp = v3_readw(V3_SYSTEM) | V3_SYSTEM_M_LOCK;
+ v3_writew(V3_SYSTEM, temp);
+
+ /*
+ * Clear any error conditions, and enable write errors.
+ */
+ v3_writeb(V3_LB_ISTAT, 0);
+ v3_writew(V3_LB_CFG, v3_readw(V3_LB_CFG) | (1 << 10));
+ v3_writeb(V3_LB_IMASK, 0x28);
+ __raw_writel(3, SC_PCI);
+
+ /*
+ * Grab the PCI error interrupt.
+ */
+ ret = request_irq(IRQ_AP_V3INT, v3_irq, 0, "V3", NULL);
+ if (ret)
+ printk(KERN_ERR "PCI: unable to grab PCI error "
+ "interrupt: %d\n", ret);
+
+ spin_unlock_irqrestore(&v3_lock, flags);
+}
+
+void __init pci_v3_postinit(void)
+{
+ unsigned int pci_cmd;
+
+ pci_cmd = PCI_COMMAND_MEMORY |
+ PCI_COMMAND_MASTER | PCI_COMMAND_INVALIDATE;
+
+ v3_writew(V3_PCI_CMD, pci_cmd);
+
+ v3_writeb(V3_LB_ISTAT, ~0x40);
+ v3_writeb(V3_LB_IMASK, 0x68);
+
+#if 0
+ ret = request_irq(IRQ_AP_LBUSTIMEOUT, lb_timeout, 0, "bus timeout", NULL);
+ if (ret)
+ printk(KERN_ERR "PCI: unable to grab local bus timeout "
+ "interrupt: %d\n", ret);
+#endif
+}