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-rw-r--r--arch/sparc/kernel/Makefile2
-rw-r--r--arch/sparc/kernel/ebus.c164
-rw-r--r--arch/sparc/kernel/pcic.c3
-rw-r--r--arch/sparc/kernel/prom.c474
4 files changed, 561 insertions, 82 deletions
diff --git a/arch/sparc/kernel/Makefile b/arch/sparc/kernel/Makefile
index 1b83e21841b..93e41d0dd8d 100644
--- a/arch/sparc/kernel/Makefile
+++ b/arch/sparc/kernel/Makefile
@@ -12,7 +12,7 @@ obj-y := entry.o wof.o wuf.o etrap.o rtrap.o traps.o $(IRQ_OBJS) \
sys_sparc.o sunos_asm.o systbls.o \
time.o windows.o cpu.o devices.o sclow.o \
tadpole.o tick14.o ptrace.o sys_solaris.o \
- unaligned.o muldiv.o semaphore.o
+ unaligned.o muldiv.o semaphore.o prom.o
obj-$(CONFIG_PCI) += pcic.o
obj-$(CONFIG_SUN4) += sun4setup.o
diff --git a/arch/sparc/kernel/ebus.c b/arch/sparc/kernel/ebus.c
index 5c3529ceb5d..9d461da7639 100644
--- a/arch/sparc/kernel/ebus.c
+++ b/arch/sparc/kernel/ebus.c
@@ -20,6 +20,7 @@
#include <asm/ebus.h>
#include <asm/io.h>
#include <asm/oplib.h>
+#include <asm/prom.h>
#include <asm/bpp.h>
struct linux_ebus *ebus_chain = NULL;
@@ -83,79 +84,81 @@ int __init ebus_blacklist_irq(char *name)
return 0;
}
-void __init fill_ebus_child(int node, struct linux_prom_registers *preg,
- struct linux_ebus_child *dev)
+void __init fill_ebus_child(struct device_node *dp,
+ struct linux_ebus_child *dev)
{
- int regs[PROMREG_MAX];
- int irqs[PROMREG_MAX];
- char lbuf[128];
+ int *regs;
+ int *irqs;
int i, len;
- dev->prom_node = node;
- prom_getstring(node, "name", lbuf, sizeof(lbuf));
- strcpy(dev->prom_name, lbuf);
-
- len = prom_getproperty(node, "reg", (void *)regs, sizeof(regs));
- if (len == -1) len = 0;
+ dev->prom_node = dp;
+ regs = of_get_property(dp, "reg", &len);
+ if (!regs)
+ len = 0;
dev->num_addrs = len / sizeof(regs[0]);
for (i = 0; i < dev->num_addrs; i++) {
if (regs[i] >= dev->parent->num_addrs) {
prom_printf("UGH: property for %s was %d, need < %d\n",
- dev->prom_name, len, dev->parent->num_addrs);
+ dev->prom_node->name, len,
+ dev->parent->num_addrs);
panic(__FUNCTION__);
}
- dev->resource[i].start = dev->parent->resource[regs[i]].start; /* XXX resource */
+
+ /* XXX resource */
+ dev->resource[i].start =
+ dev->parent->resource[regs[i]].start;
}
for (i = 0; i < PROMINTR_MAX; i++)
dev->irqs[i] = PCI_IRQ_NONE;
- if ((dev->irqs[0] = ebus_blacklist_irq(dev->prom_name)) != 0) {
+ if ((dev->irqs[0] = ebus_blacklist_irq(dev->prom_node->name)) != 0) {
dev->num_irqs = 1;
- } else if ((len = prom_getproperty(node, "interrupts",
- (char *)&irqs, sizeof(irqs))) == -1 || len == 0) {
- dev->num_irqs = 0;
- dev->irqs[0] = 0;
- if (dev->parent->num_irqs != 0) {
- dev->num_irqs = 1;
- dev->irqs[0] = dev->parent->irqs[0];
-/* P3 */ /* printk("EBUS: dev %s irq %d from parent\n", dev->prom_name, dev->irqs[0]); */
- }
} else {
- dev->num_irqs = len / sizeof(irqs[0]);
- if (irqs[0] == 0 || irqs[0] >= 8) {
- /*
- * XXX Zero is a valid pin number...
- * This works as long as Ebus is not wired to INTA#.
- */
- printk("EBUS: %s got bad irq %d from PROM\n",
- dev->prom_name, irqs[0]);
+ irqs = of_get_property(dp, "interrupts", &len);
+ if (!irqs) {
dev->num_irqs = 0;
dev->irqs[0] = 0;
+ if (dev->parent->num_irqs != 0) {
+ dev->num_irqs = 1;
+ dev->irqs[0] = dev->parent->irqs[0];
+ }
} else {
- dev->irqs[0] = pcic_pin_to_irq(irqs[0], dev->prom_name);
+ dev->num_irqs = len / sizeof(irqs[0]);
+ if (irqs[0] == 0 || irqs[0] >= 8) {
+ /*
+ * XXX Zero is a valid pin number...
+ * This works as long as Ebus is not wired
+ * to INTA#.
+ */
+ printk("EBUS: %s got bad irq %d from PROM\n",
+ dev->prom_node->name, irqs[0]);
+ dev->num_irqs = 0;
+ dev->irqs[0] = 0;
+ } else {
+ dev->irqs[0] =
+ pcic_pin_to_irq(irqs[0],
+ dev->prom_node->name);
+ }
}
}
}
-void __init fill_ebus_device(int node, struct linux_ebus_device *dev)
+void __init fill_ebus_device(struct device_node *dp, struct linux_ebus_device *dev)
{
- struct linux_prom_registers regs[PROMREG_MAX];
+ struct linux_prom_registers *regs;
struct linux_ebus_child *child;
- int irqs[PROMINTR_MAX];
- char lbuf[128];
+ int *irqs;
int i, n, len;
unsigned long baseaddr;
- dev->prom_node = node;
- prom_getstring(node, "name", lbuf, sizeof(lbuf));
- strcpy(dev->prom_name, lbuf);
+ dev->prom_node = dp;
- len = prom_getproperty(node, "reg", (void *)regs, sizeof(regs));
+ regs = of_get_property(dp, "reg", &len);
if (len % sizeof(struct linux_prom_registers)) {
prom_printf("UGH: proplen for %s was %d, need multiple of %d\n",
- dev->prom_name, len,
+ dev->prom_node->name, len,
(int)sizeof(struct linux_prom_registers));
panic(__FUNCTION__);
}
@@ -197,7 +200,7 @@ void __init fill_ebus_device(int node, struct linux_ebus_device *dev)
if ((baseaddr = (unsigned long) ioremap(baseaddr,
regs[i].reg_size)) == 0) {
panic("ebus: unable to remap dev %s",
- dev->prom_name);
+ dev->prom_node->name);
}
}
dev->resource[i].start = baseaddr; /* XXX Unaligned */
@@ -206,29 +209,33 @@ void __init fill_ebus_device(int node, struct linux_ebus_device *dev)
for (i = 0; i < PROMINTR_MAX; i++)
dev->irqs[i] = PCI_IRQ_NONE;
- if ((dev->irqs[0] = ebus_blacklist_irq(dev->prom_name)) != 0) {
+ if ((dev->irqs[0] = ebus_blacklist_irq(dev->prom_node->name)) != 0) {
dev->num_irqs = 1;
- } else if ((len = prom_getproperty(node, "interrupts",
- (char *)&irqs, sizeof(irqs))) == -1 || len == 0) {
- dev->num_irqs = 0;
- if ((dev->irqs[0] = dev->bus->self->irq) != 0) {
- dev->num_irqs = 1;
-/* P3 */ /* printk("EBUS: child %s irq %d from parent\n", dev->prom_name, dev->irqs[0]); */
- }
} else {
- dev->num_irqs = 1; /* dev->num_irqs = len / sizeof(irqs[0]); */
- if (irqs[0] == 0 || irqs[0] >= 8) {
- /* See above for the parent. XXX */
- printk("EBUS: %s got bad irq %d from PROM\n",
- dev->prom_name, irqs[0]);
+ irqs = of_get_property(dp, "interrupts", &len);
+ if (!irqs) {
dev->num_irqs = 0;
- dev->irqs[0] = 0;
+ if ((dev->irqs[0] = dev->bus->self->irq) != 0) {
+ dev->num_irqs = 1;
+/* P3 */ /* printk("EBUS: child %s irq %d from parent\n", dev->prom_name, dev->irqs[0]); */
+ }
} else {
- dev->irqs[0] = pcic_pin_to_irq(irqs[0], dev->prom_name);
+ dev->num_irqs = 1; /* dev->num_irqs = len / sizeof(irqs[0]); */
+ if (irqs[0] == 0 || irqs[0] >= 8) {
+ /* See above for the parent. XXX */
+ printk("EBUS: %s got bad irq %d from PROM\n",
+ dev->prom_node->name, irqs[0]);
+ dev->num_irqs = 0;
+ dev->irqs[0] = 0;
+ } else {
+ dev->irqs[0] =
+ pcic_pin_to_irq(irqs[0],
+ dev->prom_node->name);
+ }
}
}
- if ((node = prom_getchild(node))) {
+ if ((dp = dp->child) != NULL) {
dev->children = (struct linux_ebus_child *)
ebus_alloc(sizeof(struct linux_ebus_child));
@@ -236,9 +243,9 @@ void __init fill_ebus_device(int node, struct linux_ebus_device *dev)
child->next = NULL;
child->parent = dev;
child->bus = dev->bus;
- fill_ebus_child(node, &regs[0], child);
+ fill_ebus_child(dp, child);
- while ((node = prom_getsibling(node)) != 0) {
+ while ((dp = dp->sibling) != NULL) {
child->next = (struct linux_ebus_child *)
ebus_alloc(sizeof(struct linux_ebus_child));
@@ -246,51 +253,49 @@ void __init fill_ebus_device(int node, struct linux_ebus_device *dev)
child->next = NULL;
child->parent = dev;
child->bus = dev->bus;
- fill_ebus_child(node, &regs[0], child);
+ fill_ebus_child(dp, child);
}
}
}
void __init ebus_init(void)
{
- struct linux_prom_pci_registers regs[PROMREG_MAX];
+ struct linux_prom_pci_registers *regs;
struct linux_pbm_info *pbm;
struct linux_ebus_device *dev;
struct linux_ebus *ebus;
struct ebus_system_entry *sp;
struct pci_dev *pdev;
struct pcidev_cookie *cookie;
- char lbuf[128];
+ struct device_node *dp;
unsigned long addr, *base;
unsigned short pci_command;
- int nd, len, ebusnd;
- int reg, nreg;
+ int len, reg, nreg;
int num_ebus = 0;
- prom_getstring(prom_root_node, "name", lbuf, sizeof(lbuf));
+ dp = of_find_node_by_path("/");
for (sp = ebus_blacklist; sp->esname != NULL; sp++) {
- if (strcmp(lbuf, sp->esname) == 0) {
+ if (strcmp(dp->name, sp->esname) == 0) {
ebus_blackp = sp->ipt;
break;
}
}
pdev = pci_get_device(PCI_VENDOR_ID_SUN, PCI_DEVICE_ID_SUN_EBUS, NULL);
- if (!pdev) {
+ if (!pdev)
return;
- }
+
cookie = pdev->sysdata;
- ebusnd = cookie->prom_node;
+ dp = cookie->prom_node;
ebus_chain = ebus = (struct linux_ebus *)
ebus_alloc(sizeof(struct linux_ebus));
ebus->next = NULL;
- while (ebusnd) {
+ while (dp) {
+ struct device_node *nd;
- prom_getstring(ebusnd, "name", lbuf, sizeof(lbuf));
- ebus->prom_node = ebusnd;
- strcpy(ebus->prom_name, lbuf);
+ ebus->prom_node = dp;
ebus->self = pdev;
ebus->parent = pbm = cookie->pbm;
@@ -299,9 +304,8 @@ void __init ebus_init(void)
pci_command |= PCI_COMMAND_MASTER;
pci_write_config_word(pdev, PCI_COMMAND, pci_command);
- len = prom_getproperty(ebusnd, "reg", (void *)regs,
- sizeof(regs));
- if (len == 0 || len == -1) {
+ regs = of_get_property(dp, "reg", &len);
+ if (!regs) {
prom_printf("%s: can't find reg property\n",
__FUNCTION__);
prom_halt();
@@ -317,7 +321,7 @@ void __init ebus_init(void)
*base++ = addr;
}
- nd = prom_getchild(ebusnd);
+ nd = dp->child;
if (!nd)
goto next_ebus;
@@ -330,7 +334,7 @@ void __init ebus_init(void)
dev->bus = ebus;
fill_ebus_device(nd, dev);
- while ((nd = prom_getsibling(nd)) != 0) {
+ while ((nd = nd->sibling) != NULL) {
dev->next = (struct linux_ebus_device *)
ebus_alloc(sizeof(struct linux_ebus_device));
@@ -348,7 +352,7 @@ void __init ebus_init(void)
break;
cookie = pdev->sysdata;
- ebusnd = cookie->prom_node;
+ dp = cookie->prom_node;
ebus->next = (struct linux_ebus *)
ebus_alloc(sizeof(struct linux_ebus));
diff --git a/arch/sparc/kernel/pcic.c b/arch/sparc/kernel/pcic.c
index bcdf5ad0f03..bcfdddd0418 100644
--- a/arch/sparc/kernel/pcic.c
+++ b/arch/sparc/kernel/pcic.c
@@ -31,6 +31,7 @@
#include <asm/irq.h>
#include <asm/oplib.h>
+#include <asm/prom.h>
#include <asm/pcic.h>
#include <asm/timer.h>
#include <asm/uaccess.h>
@@ -665,7 +666,7 @@ void __init pcibios_fixup_bus(struct pci_bus *bus)
/* cookies */
pcp = pci_devcookie_alloc();
pcp->pbm = &pcic->pbm;
- pcp->prom_node = node;
+ pcp->prom_node = of_find_node_by_phandle(node);
dev->sysdata = pcp;
/* fixing I/O to look like memory */
diff --git a/arch/sparc/kernel/prom.c b/arch/sparc/kernel/prom.c
new file mode 100644
index 00000000000..63b2b9bd778
--- /dev/null
+++ b/arch/sparc/kernel/prom.c
@@ -0,0 +1,474 @@
+/*
+ * 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 sparc32 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/bootmem.h>
+#include <linux/module.h>
+
+#include <asm/prom.h>
+#include <asm/oplib.h>
+
+static struct device_node *allnodes;
+
+int of_device_is_compatible(struct device_node *device, const char *compat)
+{
+ const char* cp;
+ int cplen, l;
+
+ cp = (char *) of_get_property(device, "compatible", &cplen);
+ if (cp == NULL)
+ return 0;
+ while (cplen > 0) {
+ if (strncmp(cp, compat, strlen(compat)) == 0)
+ return 1;
+ l = strlen(cp) + 1;
+ cp += l;
+ cplen -= l;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(of_device_is_compatible);
+
+struct device_node *of_get_parent(const struct device_node *node)
+{
+ struct device_node *np;
+
+ if (!node)
+ return NULL;
+
+ np = node->parent;
+
+ return np;
+}
+EXPORT_SYMBOL(of_get_parent);
+
+struct device_node *of_get_next_child(const struct device_node *node,
+ struct device_node *prev)
+{
+ struct device_node *next;
+
+ next = prev ? prev->sibling : node->child;
+ for (; next != 0; next = next->sibling) {
+ break;
+ }
+
+ return next;
+}
+EXPORT_SYMBOL(of_get_next_child);
+
+struct device_node *of_find_node_by_path(const char *path)
+{
+ struct device_node *np = allnodes;
+
+ for (; np != 0; np = np->allnext) {
+ if (np->full_name != 0 && strcmp(np->full_name, path) == 0)
+ break;
+ }
+
+ return np;
+}
+EXPORT_SYMBOL(of_find_node_by_path);
+
+struct device_node *of_find_node_by_phandle(phandle handle)
+{
+ struct device_node *np;
+
+ for (np = allnodes; np != 0; np = np->allnext)
+ if (np->node == handle)
+ break;
+
+ return np;
+}
+EXPORT_SYMBOL(of_find_node_by_phandle);
+
+struct device_node *of_find_node_by_name(struct device_node *from,
+ const char *name)
+{
+ struct device_node *np;
+
+ np = from ? from->allnext : allnodes;
+ for (; np != NULL; np = np->allnext)
+ if (np->name != NULL && strcmp(np->name, name) == 0)
+ break;
+
+ return np;
+}
+EXPORT_SYMBOL(of_find_node_by_name);
+
+struct device_node *of_find_node_by_type(struct device_node *from,
+ const char *type)
+{
+ struct device_node *np;
+
+ np = from ? from->allnext : allnodes;
+ for (; np != 0; np = np->allnext)
+ if (np->type != 0 && strcmp(np->type, type) == 0)
+ break;
+
+ return np;
+}
+EXPORT_SYMBOL(of_find_node_by_type);
+
+struct device_node *of_find_compatible_node(struct device_node *from,
+ const char *type, const char *compatible)
+{
+ struct device_node *np;
+
+ np = from ? from->allnext : allnodes;
+ for (; np != 0; np = np->allnext) {
+ if (type != NULL
+ && !(np->type != 0 && strcmp(np->type, type) == 0))
+ continue;
+ if (of_device_is_compatible(np, compatible))
+ break;
+ }
+
+ return np;
+}
+EXPORT_SYMBOL(of_find_compatible_node);
+
+struct property *of_find_property(struct device_node *np, const char *name,
+ int *lenp)
+{
+ struct property *pp;
+
+ for (pp = np->properties; pp != 0; pp = pp->next) {
+ if (strcmp(pp->name, name) == 0) {
+ if (lenp != 0)
+ *lenp = pp->length;
+ break;
+ }
+ }
+ return pp;
+}
+EXPORT_SYMBOL(of_find_property);
+
+/*
+ * Find a property with a given name for a given node
+ * and return the value.
+ */
+void *of_get_property(struct device_node *np, const char *name, int *lenp)
+{
+ struct property *pp = of_find_property(np,name,lenp);
+ return pp ? pp->value : NULL;
+}
+EXPORT_SYMBOL(of_get_property);
+
+int of_getintprop_default(struct device_node *np, const char *name, int def)
+{
+ struct property *prop;
+ int len;
+
+ prop = of_find_property(np, name, &len);
+ if (!prop || len != 4)
+ return def;
+
+ return *(int *) prop->value;
+}
+EXPORT_SYMBOL(of_getintprop_default);
+
+static unsigned int prom_early_allocated;
+
+static void * __init prom_early_alloc(unsigned long size)
+{
+ void *ret;
+
+ ret = __alloc_bootmem(size, SMP_CACHE_BYTES, 0UL);
+ if (ret != NULL)
+ memset(ret, 0, size);
+
+ prom_early_allocated += size;
+
+ return ret;
+}
+
+static int is_root_node(const struct device_node *dp)
+{
+ if (!dp)
+ return 0;
+
+ return (dp->parent == NULL);
+}
+
+/* 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.
+ */
+static void __init sparc32_path_component(struct device_node *dp, char *tmp_buf)
+{
+ struct linux_prom_registers *regs;
+ struct property *rprop;
+
+ rprop = of_find_property(dp, "reg", NULL);
+ if (!rprop)
+ return;
+
+ regs = rprop->value;
+ sprintf(tmp_buf, "%s@%x,%x",
+ dp->name,
+ regs->which_io, regs->phys_addr);
+}
+
+/* "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@addrhi,addrlo" */
+static void __init ebus_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);
+}
+
+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"))
+ return pci_path_component(dp, tmp_buf);
+ if (!strcmp(parent->type, "sbus"))
+ return sbus_path_component(dp, tmp_buf);
+ if (!strcmp(parent->type, "ebus"))
+ return ebus_path_component(dp, tmp_buf);
+
+ /* "isa" is handled with platform naming */
+ }
+
+ /* Use platform naming convention. */
+ return sparc32_path_component(dp, tmp_buf);
+}
+
+static 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 char * __init build_full_name(struct device_node *dp)
+{
+ int len, ourlen, plen;
+ char *n;
+
+ plen = strlen(dp->parent->full_name);
+ ourlen = strlen(dp->path_component_name);
+ len = ourlen + plen + 2;
+
+ n = prom_early_alloc(len);
+ strcpy(n, dp->parent->full_name);
+ if (!is_root_node(dp->parent)) {
+ strcpy(n + plen, "/");
+ plen++;
+ }
+ strcpy(n + plen, dp->path_component_name);
+
+ return n;
+}
+
+static struct property * __init build_one_prop(phandle node, char *prev)
+{
+ static struct property *tmp = NULL;
+ struct property *p;
+ int len;
+
+ if (tmp) {
+ p = tmp;
+ memset(p, 0, sizeof(*p) + 32);
+ tmp = NULL;
+ } else
+ p = prom_early_alloc(sizeof(struct property) + 32);
+
+ p->name = (char *) (p + 1);
+ if (prev == NULL) {
+ prom_firstprop(node, p->name);
+ } else {
+ prom_nextprop(node, prev, p->name);
+ }
+ if (strlen(p->name) == 0) {
+ tmp = p;
+ return NULL;
+ }
+ p->length = prom_getproplen(node, p->name);
+ if (p->length <= 0) {
+ p->length = 0;
+ } else {
+ p->value = prom_early_alloc(p->length);
+ len = prom_getproperty(node, p->name, p->value, p->length);
+ }
+ return p;
+}
+
+static struct property * __init build_prop_list(phandle node)
+{
+ struct property *head, *tail;
+
+ head = tail = build_one_prop(node, NULL);
+ while(tail) {
+ tail->next = build_one_prop(node, tail->name);
+ tail = tail->next;
+ }
+
+ return head;
+}
+
+static char * __init get_one_property(phandle node, char *name)
+{
+ char *buf = "<NULL>";
+ int len;
+
+ len = prom_getproplen(node, name);
+ if (len > 0) {
+ buf = prom_early_alloc(len);
+ len = prom_getproperty(node, name, buf, len);
+ }
+
+ return buf;
+}
+
+static struct device_node * __init create_node(phandle node)
+{
+ struct device_node *dp;
+
+ if (!node)
+ return NULL;
+
+ dp = prom_early_alloc(sizeof(*dp));
+
+ kref_init(&dp->kref);
+
+ dp->name = get_one_property(node, "name");
+ dp->type = get_one_property(node, "device_type");
+ dp->node = node;
+
+ /* Build interrupts later... */
+
+ dp->properties = build_prop_list(node);
+
+ return dp;
+}
+
+static struct device_node * __init build_tree(struct device_node *parent, phandle node, struct device_node ***nextp)
+{
+ struct device_node *dp;
+
+ dp = create_node(node);
+ if (dp) {
+ *(*nextp) = dp;
+ *nextp = &dp->allnext;
+
+ dp->parent = parent;
+ dp->path_component_name = build_path_component(dp);
+ dp->full_name = build_full_name(dp);
+
+ dp->child = build_tree(dp, prom_getchild(node), nextp);
+
+ dp->sibling = build_tree(parent, prom_getsibling(node), nextp);
+ }
+
+ return dp;
+}
+
+void __init prom_build_devicetree(void)
+{
+ struct device_node **nextp;
+
+ allnodes = create_node(prom_root_node);
+ allnodes->path_component_name = "";
+ allnodes->full_name = "/";
+
+ nextp = &allnodes->allnext;
+ allnodes->child = build_tree(allnodes,
+ prom_getchild(allnodes->node),
+ &nextp);
+ printk("PROM: Built device tree with %u bytes of memory.\n",
+ prom_early_allocated);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-12 18:15:27 +0000