/*
* Procedures for creating, accessing and interpreting the device tree.
*
* Paul Mackerras August 1996.
* Copyright (C) 1996-2005 Paul Mackerras.
*
* Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner.
* {engebret|bergner}@us.ibm.com
*
* Adapted for sparc64 by David S. Miller davem@davemloft.net
*
* 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.
*/
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/lmb.h>
#include <linux/of_device.h>
#include <asm/prom.h>
#include <asm/oplib.h>
#include <asm/irq.h>
#include <asm/asi.h>
#include <asm/upa.h>
#include <asm/smp.h>
#include "prom.h"
void * __init prom_early_alloc(unsigned long size)
{
unsigned long paddr = lmb_alloc(size, SMP_CACHE_BYTES);
void *ret;
if (!paddr) {
prom_printf("prom_early_alloc(%lu) failed\n");
prom_halt();
}
ret = __va(paddr);
memset(ret, 0, size);
prom_early_allocated += size;
return ret;
}
/* The following routines deal with the black magic of fully naming a
* node.
*
* Certain well known named nodes are just the simple name string.
*
* Actual devices have an address specifier appended to the base name
* string, like this "foo@addr". The "addr" can be in any number of
* formats, and the platform plus the type of the node determine the
* format and how it is constructed.
*
* For children of the ROOT node, the naming convention is fixed and
* determined by whether this is a sun4u or sun4v system.
*
* For children of other nodes, it is bus type specific. So
* we walk up the tree until we discover a "device_type" property
* we recognize and we go from there.
*
* As an example, the boot device on my workstation has a full path:
*
* /pci@1e,600000/ide@d/disk@0,0:c
*/
static void __init sun4v_path_component(struct device_node *dp, char *tmp_buf)
{
struct linux_prom64_registers *regs;
struct property *rprop;
u32 high_bits, low_bits, type;
rprop = of_find_property(dp, "reg", NULL);
if (!rprop)
return;
regs = rprop->value;
if (!is_root_node(dp->parent)) {
sprintf(tmp_buf, "%s@%x,%x",
dp->name,
(unsigned int) (regs->phys_addr >> 32UL),
(unsigned int) (regs->phys_addr & 0xffffffffUL));
return;
}
type = regs->phys_addr >> 60UL;
high_bits = (regs->phys_addr >> 32UL) & 0x0fffffffUL;
low_bits = (regs->phys_addr & 0xffffffffUL);
if (type == 0 || type == 8) {
const char *prefix = (type == 0) ? "m" : "i";
if (low_bits)
sprintf(tmp_buf, "%s@%s%x,%x",
dp->name, prefix,
high_bits, low_bits);
else
sprintf(tmp_buf, "%s@%s%x",
dp->name,
prefix,
high_bits);
} else if (type == 12) {
sprintf(tmp_buf, "%s@%x",
dp->name, high_bits);
}
}
static void __init sun4u_path_component(struct device_node *dp, char *tmp_buf)
{
struct linux_prom64_registers *regs;
struct property *prop;
prop = of_find_property(dp, "reg", NULL);
if (!prop)
return;
regs = prop->value;
if (!is_root_node(dp->parent)) {
sprintf(tmp_buf, "%s@%x,%x",
dp->name,
(unsigned int) (regs->phys_addr >> 32UL),
(unsigned int) (regs->phys_addr & 0xffffffffUL));
return;
}
prop = of_find_property(dp, "upa-portid", NULL);
if (!prop)
prop = of_find_property(dp, "portid", NULL);
if (prop) {
unsigned long mask = 0xffffffffUL;
if (tlb_type >= cheetah)
mask = 0x7fffff;
sprintf(tmp_buf, "%s@%x,%x",
dp->name,
*(u32 *)prop->value,
(unsigned int) (regs->phys_addr & mask));
}
}
/* "name@slot,offset" */
static void __init sbus_path_component(struct device_node *dp, char *tmp_buf)
{
struct linux_prom_registers *regs;
struct property *prop;
prop = of_find_property(dp, "reg", NULL);
if (!prop)
return;
regs = prop->value;
sprintf(tmp_buf, "%s@%x,%x",
dp->name,
regs->which_io,
regs->phys_addr);
}
/* "name@devnum[,func]" */
static void __init pci_path_component(struct device_node *dp, char *tmp_buf)
{
struct linux_prom_pci_registers *regs;
struct property *prop;
unsigned int devfn;
prop = of_find_property(dp, "reg", NULL);
if (!prop)
return;
regs = prop->value;
devfn = (regs->phys_hi >> 8) & 0xff;
if (devfn & 0x07) {
sprintf(tmp_buf, "%s@%x,%x",
dp->name,
devfn >> 3,
devfn & 0x07);
} else {
sprintf(tmp_buf, "%s@%x",
dp->name,
devfn >> 3);
}
}
/* "name@UPA_PORTID,offset" */
static void __init upa_path_component(struct device_node *dp, char *tmp_buf)
{
struct linux_prom64_registers *regs;
struct property *prop;
prop = of_find_property(dp, "reg", NULL);
if (!prop)
return;
regs = prop->value;
prop = of_find_property(dp, "upa-portid", NULL);
if (!prop)
return;
sprintf(tmp_buf, "%s@%x,%x",
dp->name,
*(u32 *) prop->value,
(unsigned int) (regs->phys_addr & 0xffffffffUL));
}
/* "name@reg" */
static void __init vdev_path_component(struct device_node *dp, char *tmp_buf)
{
struct property *prop;
u32 *regs;
prop = of_find_property(dp, "reg", NULL);
if (!prop)
return;
regs = prop->value;
sprintf(tmp_buf, "%s@%x", dp->name, *regs);
}
/* "name@addrhi,addrlo" */
static void __init ebus_path_component(struct device_node *dp, char *tmp_buf)
{
struct linux_prom64_registers *regs;
struct property *prop;
prop = of_find_property(dp, "reg", NULL);
if (!prop)
return;
regs = prop->value;
sprintf(tmp_buf, "%s@%x,%x",
dp->name,
(unsigned int) (regs->phys_addr >> 32UL),
(unsigned int) (regs->phys_addr & 0xffffffffUL));
}
/* "name@bus,addr" */
static void __init i2c_path_component(struct device_node *dp, char *tmp_buf)
{
struct property *prop;
u32 *regs;
prop = of_find_property(dp, "reg", NULL);
if (!prop)
return;
regs = prop->value;
/* This actually isn't right... should look at the #address-cells
* property of the i2c bus node etc. etc.
*/
sprintf(tmp_buf, "%s@%x,%x",
dp->name, regs[0], regs[1]);
}
/* "name@reg0[,reg1]" */
static void __init usb_path_component(struct device_node *dp, char *tmp_buf)
{
struct property *prop;
u32 *regs;
prop = of_find_property(dp, "reg", NULL);
if (!prop)
return;
regs = prop->value;
if (prop->length == sizeof(u32) || regs[1] == 1) {
sprintf(tmp_buf, "%s@%x",
dp->name, regs[0]);
} else {
sprintf(tmp_buf, "%s@%x,%x",
dp->name, regs[0], regs[1]);
}
}
/* "name@reg0reg1[,reg2reg3]" */
static void __init ieee1394_path_component(struct device_node *dp, char *tmp_buf)
{
struct property *prop;
u32 *regs;
prop = of_find_property(dp, "reg", NULL);
if (!prop)
return;
regs = prop->value;
if (regs[2] || regs[3]) {
sprintf(tmp_buf, "%s@%08x%08x,%04x%08x",
dp->name, regs[0], regs[1], regs[2], regs[3]);
} else {
sprintf(tmp_buf, "%s@%08x%08x",
dp->name, regs[0], regs[1]);
}
}
static void __init __build_path_component(struct device_node *dp, char *tmp_buf)
{
struct device_node *parent = dp->parent;
if (parent != NULL) {
if (!strcmp(parent->type, "pci") ||
!strcmp(parent->type, "pciex")) {
pci_path_component(dp, tmp_buf);
return;
}
if (!strcmp(parent->type, "sbus")) {
sbus_path_component(dp, tmp_buf);
return;
}
if (!strcmp(parent->type, "upa")) {
upa_path_component(dp, tmp_buf);
return;
}
if (!strcmp(parent->type, "ebus")) {
ebus_path_component(dp, tmp_buf);
return;
}
if (!strcmp(parent->name, "usb") ||
!strcmp(parent->name, "hub")) {
usb_path_component(dp, tmp_buf);
return;
}
if (!strcmp(parent->type, "i2c")) {
i2c_path_component(dp, tmp_buf);
return;
}
if (!strcmp(parent->type, "firewire")) {
ieee1394_path_component(dp, tmp_buf);
return;
}
if (!strcmp(parent->type, "virtual-devices")) {
vdev_path_component(dp, tmp_buf);
return;
}
/* "isa" is handled with platform naming */
}
/* Use platform naming convention. */
if (tlb_type == hypervisor) {
sun4v_path_component(dp, tmp_buf);
return;
} else {
sun4u_path_component(dp, tmp_buf);
}
}
char * __init build_path_component(struct device_node *dp)
{
char tmp_buf[64], *n;
tmp_buf[0] = '\0';
__build_path_component(dp, tmp_buf);
if (tmp_buf[0] == '\0')
strcpy(tmp_buf, dp->name);
n = prom_early_alloc(strlen(tmp_buf) + 1);
strcpy(n, tmp_buf);
return n;
}
static const char *get_mid_prop(void)
{
return (tlb_type == spitfire ? "upa-portid" : "portid");
}
static void *of_iterate_over_cpus(void *(*func)(struct device_node *, int, int), int arg)
{
struct device_node *dp;
const char *mid_prop;
mid_prop = get_mid_prop();
for_each_node_by_type(dp, "cpu") {
int cpuid = of_getintprop_default(dp, mid_prop, -1);
const char *this_mid_prop = mid_prop;
void *ret;
if (cpuid < 0) {
this_mid_prop = "cpuid";
cpuid = of_getintprop_default(dp, this_mid_prop, -1);
}
if (cpuid < 0) {
prom_printf("OF: Serious problem, cpu lacks "
"%s property", this_mid_prop);
prom_halt();
}
#ifdef CONFIG_SMP
if (cpuid >= NR_CPUS) {
printk(KERN_WARNING "Ignoring CPU %d which is "
">= NR_CPUS (%d)\n",
cpuid, NR_CPUS);
continue;
}
#endif
ret = func(dp, cpuid, arg);
if (ret)
return ret;
}
return NULL;
}
static void *check_cpu_node(struct device_node *dp, int cpuid, int id)
{
if (id == cpuid)
return dp;
return NULL;
}
struct device_node *of_find_node_by_cpuid(int cpuid)
{
return of_iterate_over_cpus(check_cpu_node, cpuid);
}
static void *record_one_cpu(struct device_node *dp, int cpuid, int arg)
{
ncpus_probed++;
#ifdef CONFIG_SMP
set_cpu_present(cpuid, true);
set_cpu_possible(cpuid, true);
#endif
return NULL;
}
void __init of_populate_present_mask(void)
{
if (tlb_type == hypervisor)
return;
ncpus_probed = 0;
of_iterate_over_cpus(record_one_cpu, 0);
}
static void *fill_in_one_cpu(struct device_node *dp, int cpuid, int arg)
{
struct device_node *portid_parent = NULL;
int portid = -1;
if (of_find_property(dp, "cpuid", NULL)) {
int limit = 2;
portid_parent = dp;
while (limit--) {
portid_parent = portid_parent->parent;
if (!portid_parent)
break;
portid = of_getintprop_default(portid_parent,
"portid", -1);
if (portid >= 0)
break;
}
}
#ifndef CONFIG_SMP
/* On uniprocessor we only want the values for the
* real physical cpu the kernel booted onto, however
* cpu_data() only has one entry at index 0.
*/
if (cpuid != real_hard_smp_processor_id())
return NULL;
cpuid = 0;
#endif
cpu_data(cpuid).clock_tick =
of_getintprop_default(dp, "clock-frequency", 0);
if (portid_parent) {
cpu_data(cpuid).dcache_size =
of_getintprop_default(dp, "l1-dcache-size",
16 * 1024);
cpu_data(cpuid).dcache_line_size =
of_getintprop_default(dp, "l1-dcache-line-size",
32);
cpu_data(cpuid).icache_size =
of_getintprop_default(dp, "l1-icache-size",
8 * 1024);
cpu_data(cpuid).icache_line_size =
of_getintprop_default(dp, "l1-icache-line-size",
32);
cpu_data(cpuid).ecache_size =
of_getintprop_default(dp, "l2-cache-size", 0);
cpu_data(cpuid).ecache_line_size =
of_getintprop_default(dp, "l2-cache-line-size", 0);
if (!cpu_data(cpuid).ecache_size ||
!cpu_data(cpuid).ecache_line_size) {
cpu_data(cpuid).ecache_size =
of_getintprop_default(portid_parent,
"l2-cache-size",
(4 * 1024 * 1024));
cpu_data(cpuid).ecache_line_size =
of_getintprop_default(portid_parent,
"l2-cache-line-size", 64);
}
cpu_data(cpuid).core_id = portid + 1;
cpu_data(cpuid).proc_id = portid;
#ifdef CONFIG_SMP
sparc64_multi_core = 1;
#endif
} else {
cpu_data(cpuid).dcache_size =
of_getintprop_default(dp, "dcache-size", 16 * 1024);
cpu_data(cpuid).dcache_line_size =
of_getintprop_default(dp, "dcache-line-size", 32);
cpu_data(cpuid).icache_size =
of_getintprop_default(dp, "icache-size", 16 * 1024);
cpu_data(cpuid).icache_line_size =
of_getintprop_default(dp, "icache-line-size", 32);
cpu_data(cpuid).ecache_size =
of_getintprop_default(dp, "ecache-size",
(4 * 1024 * 1024));
cpu_data(cpuid).ecache_line_size =
of_getintprop_default(dp, "ecache-line-size", 64);
cpu_data(cpuid).core_id = 0;
cpu_data(cpuid).proc_id = -1;
}
return NULL;
}
void __init of_fill_in_cpu_data(void)
{
if (tlb_type == hypervisor)
return;
of_iterate_over_cpus(fill_in_one_cpu, 0);
smp_fill_in_sib_core_maps();
}
void __init of_console_init(void)
{
char *msg = "OF stdout device is: %s\n";
struct device_node *dp;
const char *type;
phandle node;
of_console_path = prom_early_alloc(256);
if (prom_ihandle2path(prom_stdout, of_console_path, 256) < 0) {
prom_printf("Cannot obtain path of stdout.\n");
prom_halt();
}
of_console_options = strrchr(of_console_path, ':');
if (of_console_options) {
of_console_options++;
if (*of_console_options == '\0')
of_console_options = NULL;
}
node = prom_inst2pkg(prom_stdout);
if (!node) {
prom_printf("Cannot resolve stdout node from "
"instance %08x.\n", prom_stdout);
prom_halt();
}
dp = of_find_node_by_phandle(node);
type = of_get_property(dp, "device_type", NULL);
if (!type) {
prom_printf("Console stdout lacks device_type property.\n");
prom_halt();
}
if (strcmp(type, "display") && strcmp(type, "serial")) {
prom_printf("Console device_type is neither display "
"nor serial.\n");
prom_halt();
}
of_console_device = dp;
printk(msg, of_console_path);
}
