298 lines
6.7 KiB
C
298 lines
6.7 KiB
C
/* devices.c: Initial scan of the prom device tree for important
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* Sparc device nodes which we need to find.
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*
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* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
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*/
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#include <linux/config.h>
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#include <linux/kernel.h>
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#include <linux/threads.h>
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#include <linux/init.h>
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#include <linux/ioport.h>
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#include <linux/string.h>
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#include <linux/spinlock.h>
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#include <linux/errno.h>
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#include <linux/bootmem.h>
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#include <asm/page.h>
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#include <asm/oplib.h>
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#include <asm/system.h>
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#include <asm/smp.h>
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#include <asm/spitfire.h>
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#include <asm/timer.h>
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#include <asm/cpudata.h>
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#include <asm/vdev.h>
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#include <asm/irq.h>
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/* Used to synchronize acceses to NatSemi SUPER I/O chip configure
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* operations in asm/ns87303.h
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*/
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DEFINE_SPINLOCK(ns87303_lock);
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extern void cpu_probe(void);
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extern void central_probe(void);
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u32 sun4v_vdev_devhandle;
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struct device_node *sun4v_vdev_root;
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struct vdev_intmap {
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unsigned int phys;
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unsigned int irq;
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unsigned int cnode;
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unsigned int cinterrupt;
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};
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struct vdev_intmask {
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unsigned int phys;
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unsigned int interrupt;
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unsigned int __unused;
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};
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static struct vdev_intmap *vdev_intmap;
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static int vdev_num_intmap;
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static struct vdev_intmask *vdev_intmask;
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static void __init sun4v_virtual_device_probe(void)
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{
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struct linux_prom64_registers *regs;
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struct property *prop;
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struct device_node *dp;
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int sz;
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if (tlb_type != hypervisor)
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return;
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dp = of_find_node_by_name(NULL, "virtual-devices");
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if (!dp) {
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prom_printf("SUN4V: Fatal error, no virtual-devices node.\n");
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prom_halt();
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}
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sun4v_vdev_root = dp;
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prop = of_find_property(dp, "reg", NULL);
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regs = prop->value;
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sun4v_vdev_devhandle = (regs[0].phys_addr >> 32UL) & 0x0fffffff;
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prop = of_find_property(dp, "interrupt-map", &sz);
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vdev_intmap = prop->value;
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vdev_num_intmap = sz / sizeof(struct vdev_intmap);
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prop = of_find_property(dp, "interrupt-map-mask", NULL);
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vdev_intmask = prop->value;
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printk("%s: Virtual Device Bus devhandle[%x]\n",
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dp->full_name, sun4v_vdev_devhandle);
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}
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unsigned int sun4v_vdev_device_interrupt(struct device_node *dev_node)
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{
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struct property *prop;
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unsigned int irq, reg;
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int i;
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prop = of_find_property(dev_node, "interrupts", NULL);
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if (!prop) {
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printk("VDEV: Cannot get \"interrupts\" "
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"property for OBP node %s\n",
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dev_node->full_name);
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return 0;
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}
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irq = *(unsigned int *) prop->value;
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prop = of_find_property(dev_node, "reg", NULL);
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if (!prop) {
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printk("VDEV: Cannot get \"reg\" "
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"property for OBP node %s\n",
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dev_node->full_name);
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return 0;
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}
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reg = *(unsigned int *) prop->value;
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for (i = 0; i < vdev_num_intmap; i++) {
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if (vdev_intmap[i].phys == (reg & vdev_intmask->phys) &&
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vdev_intmap[i].irq == (irq & vdev_intmask->interrupt)) {
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irq = vdev_intmap[i].cinterrupt;
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break;
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}
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}
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if (i == vdev_num_intmap) {
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printk("VDEV: No matching interrupt map entry "
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"for OBP node %s\n", dev_node->full_name);
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return 0;
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}
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return sun4v_build_irq(sun4v_vdev_devhandle, irq);
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}
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static const char *cpu_mid_prop(void)
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{
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if (tlb_type == spitfire)
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return "upa-portid";
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return "portid";
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}
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static int get_cpu_mid(struct device_node *dp)
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{
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struct property *prop;
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if (tlb_type == hypervisor) {
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struct linux_prom64_registers *reg;
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int len;
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prop = of_find_property(dp, "cpuid", &len);
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if (prop && len == 4)
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return *(int *) prop->value;
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prop = of_find_property(dp, "reg", NULL);
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reg = prop->value;
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return (reg[0].phys_addr >> 32) & 0x0fffffffUL;
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} else {
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const char *prop_name = cpu_mid_prop();
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prop = of_find_property(dp, prop_name, NULL);
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if (prop)
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return *(int *) prop->value;
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return 0;
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}
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}
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static int check_cpu_node(struct device_node *dp, int *cur_inst,
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int (*compare)(struct device_node *, int, void *),
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void *compare_arg,
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struct device_node **dev_node, int *mid)
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{
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if (strcmp(dp->type, "cpu"))
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return -ENODEV;
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if (!compare(dp, *cur_inst, compare_arg)) {
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if (dev_node)
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*dev_node = dp;
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if (mid)
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*mid = get_cpu_mid(dp);
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return 0;
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}
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(*cur_inst)++;
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return -ENODEV;
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}
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static int __cpu_find_by(int (*compare)(struct device_node *, int, void *),
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void *compare_arg,
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struct device_node **dev_node, int *mid)
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{
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struct device_node *dp;
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int cur_inst;
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cur_inst = 0;
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for_each_node_by_type(dp, "cpu") {
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int err = check_cpu_node(dp, &cur_inst,
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compare, compare_arg,
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dev_node, mid);
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if (err == 0)
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return 0;
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}
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return -ENODEV;
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}
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static int cpu_instance_compare(struct device_node *dp, int instance, void *_arg)
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{
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int desired_instance = (int) (long) _arg;
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if (instance == desired_instance)
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return 0;
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return -ENODEV;
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}
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int cpu_find_by_instance(int instance, struct device_node **dev_node, int *mid)
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{
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return __cpu_find_by(cpu_instance_compare, (void *)(long)instance,
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dev_node, mid);
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}
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static int cpu_mid_compare(struct device_node *dp, int instance, void *_arg)
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{
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int desired_mid = (int) (long) _arg;
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int this_mid;
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this_mid = get_cpu_mid(dp);
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if (this_mid == desired_mid)
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return 0;
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return -ENODEV;
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}
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int cpu_find_by_mid(int mid, struct device_node **dev_node)
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{
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return __cpu_find_by(cpu_mid_compare, (void *)(long)mid,
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dev_node, NULL);
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}
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void __init device_scan(void)
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{
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/* FIX ME FAST... -DaveM */
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ioport_resource.end = 0xffffffffffffffffUL;
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prom_printf("Booting Linux...\n");
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#ifndef CONFIG_SMP
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{
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struct device_node *dp;
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int err, def;
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err = cpu_find_by_instance(0, &dp, NULL);
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if (err) {
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prom_printf("No cpu nodes, cannot continue\n");
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prom_halt();
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}
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cpu_data(0).clock_tick =
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of_getintprop_default(dp, "clock-frequency", 0);
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def = ((tlb_type == hypervisor) ?
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(8 * 1024) :
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(16 * 1024));
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cpu_data(0).dcache_size = of_getintprop_default(dp,
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"dcache-size",
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def);
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def = 32;
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cpu_data(0).dcache_line_size =
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of_getintprop_default(dp, "dcache-line-size", def);
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def = 16 * 1024;
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cpu_data(0).icache_size = of_getintprop_default(dp,
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"icache-size",
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def);
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def = 32;
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cpu_data(0).icache_line_size =
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of_getintprop_default(dp, "icache-line-size", def);
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def = ((tlb_type == hypervisor) ?
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(3 * 1024 * 1024) :
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(4 * 1024 * 1024));
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cpu_data(0).ecache_size = of_getintprop_default(dp,
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"ecache-size",
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def);
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def = 64;
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cpu_data(0).ecache_line_size =
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of_getintprop_default(dp, "ecache-line-size", def);
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printk("CPU[0]: Caches "
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"D[sz(%d):line_sz(%d)] "
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"I[sz(%d):line_sz(%d)] "
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"E[sz(%d):line_sz(%d)]\n",
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cpu_data(0).dcache_size, cpu_data(0).dcache_line_size,
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cpu_data(0).icache_size, cpu_data(0).icache_line_size,
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cpu_data(0).ecache_size, cpu_data(0).ecache_line_size);
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}
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#endif
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sun4v_virtual_device_probe();
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central_probe();
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cpu_probe();
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}
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