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alistair23-linux/arch/sparc/kernel/prom_64.c
Thomas Gleixner 2874c5fd28 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 
Based on 1 normalized pattern(s):

  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

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 3029 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:32 -07:00

634 lines
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* 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
*/
#include <linux/memblock.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/types.h>
#include <linux/cpu.h>
#include <linux/mm.h>
#include <linux/of.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)
{
void *ret = memblock_alloc(size, SMP_CACHE_BYTES);
if (!ret) {
prom_printf("prom_early_alloc(%lu) failed\n", size);
prom_halt();
}
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)
{
const char *name = of_get_property(dp, "name", NULL);
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 (!of_node_is_root(dp->parent)) {
sprintf(tmp_buf, "%s@%x,%x",
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",
name, prefix,
high_bits, low_bits);
else
sprintf(tmp_buf, "%s@%s%x",
name,
prefix,
high_bits);
} else if (type == 12) {
sprintf(tmp_buf, "%s@%x",
name, high_bits);
}
}
static void __init sun4u_path_component(struct device_node *dp, char *tmp_buf)
{
const char *name = of_get_property(dp, "name", NULL);
struct linux_prom64_registers *regs;
struct property *prop;
prop = of_find_property(dp, "reg", NULL);
if (!prop)
return;
regs = prop->value;
if (!of_node_is_root(dp->parent)) {
sprintf(tmp_buf, "%s@%x,%x",
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",
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)
{
const char *name = of_get_property(dp, "name", NULL);
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",
name,
regs->which_io,
regs->phys_addr);
}
/* "name@devnum[,func]" */
static void __init pci_path_component(struct device_node *dp, char *tmp_buf)
{
const char *name = of_get_property(dp, "name", NULL);
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",
name,
devfn >> 3,
devfn & 0x07);
} else {
sprintf(tmp_buf, "%s@%x",
name,
devfn >> 3);
}
}
/* "name@UPA_PORTID,offset" */
static void __init upa_path_component(struct device_node *dp, char *tmp_buf)
{
const char *name = of_get_property(dp, "name", NULL);
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",
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)
{
const char *name = of_get_property(dp, "name", NULL);
struct property *prop;
u32 *regs;
prop = of_find_property(dp, "reg", NULL);
if (!prop)
return;
regs = prop->value;
sprintf(tmp_buf, "%s@%x", name, *regs);
}
/* "name@addrhi,addrlo" */
static void __init ebus_path_component(struct device_node *dp, char *tmp_buf)
{
const char *name = of_get_property(dp, "name", NULL);
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",
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)
{
const char *name = of_get_property(dp, "name", NULL);
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",
name, regs[0], regs[1]);
}
/* "name@reg0[,reg1]" */
static void __init usb_path_component(struct device_node *dp, char *tmp_buf)
{
const char *name = of_get_property(dp, "name", NULL);
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",
name, regs[0]);
} else {
sprintf(tmp_buf, "%s@%x,%x",
name, regs[0], regs[1]);
}
}
/* "name@reg0reg1[,reg2reg3]" */
static void __init ieee1394_path_component(struct device_node *dp, char *tmp_buf)
{
const char *name = of_get_property(dp, "name", NULL);
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",
name, regs[0], regs[1], regs[2], regs[3]);
} else {
sprintf(tmp_buf, "%s@%08x%08x",
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 (of_node_is_type(parent, "pci") ||
of_node_is_type(parent, "pciex")) {
pci_path_component(dp, tmp_buf);
return;
}
if (of_node_is_type(parent, "sbus")) {
sbus_path_component(dp, tmp_buf);
return;
}
if (of_node_is_type(parent, "upa")) {
upa_path_component(dp, tmp_buf);
return;
}
if (of_node_is_type(parent, "ebus")) {
ebus_path_component(dp, tmp_buf);
return;
}
if (of_node_name_eq(parent, "usb") ||
of_node_name_eq(parent, "hub")) {
usb_path_component(dp, tmp_buf);
return;
}
if (of_node_is_type(parent, "i2c")) {
i2c_path_component(dp, tmp_buf);
return;
}
if (of_node_is_type(parent, "firewire")) {
ieee1394_path_component(dp, tmp_buf);
return;
}
if (of_node_is_type(parent, "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)
{
const char *name = of_get_property(dp, "name", NULL);
char tmp_buf[64], *n;
tmp_buf[0] = '\0';
__build_path_component(dp, tmp_buf);
if (tmp_buf[0] == '\0')
strcpy(tmp_buf, 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");
}
bool arch_find_n_match_cpu_physical_id(struct device_node *cpun,
int cpu, unsigned int *thread)
{
const char *mid_prop = get_mid_prop();
int this_cpu_id;
/* On hypervisor based platforms we interrogate the 'reg'
* property. On everything else we look for a 'upa-portid',
* 'portid', or 'cpuid' property.
*/
if (tlb_type == hypervisor) {
struct property *prop = of_find_property(cpun, "reg", NULL);
u32 *regs;
if (!prop) {
pr_warn("CPU node missing reg property\n");
return false;
}
regs = prop->value;
this_cpu_id = regs[0] & 0x0fffffff;
} else {
this_cpu_id = of_getintprop_default(cpun, mid_prop, -1);
if (this_cpu_id < 0) {
mid_prop = "cpuid";
this_cpu_id = of_getintprop_default(cpun, mid_prop, -1);
}
if (this_cpu_id < 0) {
pr_warn("CPU node missing cpu ID property\n");
return false;
}
}
if (this_cpu_id == cpu) {
if (thread) {
int proc_id = cpu_data(cpu).proc_id;
/* On sparc64, the cpu thread information is obtained
* either from OBP or the machine description. We've
* actually probed this information already long before
* this interface gets called so instead of interrogating
* both the OF node and the MDESC again, just use what
* we discovered already.
*/
if (proc_id < 0)
proc_id = 0;
*thread = proc_id;
}
return true;
}
return false;
}
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;
} 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;
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);
if (!of_node_is_type(dp, "display") && !of_node_is_type(dp, "serial")) {
prom_printf("Console device_type is neither display "
"nor serial.\n");
prom_halt();
}
of_console_device = dp;
printk(msg, of_console_path);
}
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