[PATCH 04/56] microblaze_v2: Open firmware files

monstr
2008-05-04T13:21:48Z

From: Michal Simek <monstr@monstr.eu>

Signed-off-by: Michal Simek <monstr@monstr.eu>
---
arch/microblaze/kernel/prom.c | 1653 ++++++++++++++++++++++++++++++++++
include/asm-microblaze/of_device.h | 41 +
include/asm-microblaze/of_platform.h | 45 +
include/asm-microblaze/prom.h | 311 +++++++
4 files changed, 2050 insertions(+), 0 deletions(-)
create mode 100644 arch/microblaze/kernel/prom.c
create mode 100644 include/asm-microblaze/of_device.h
create mode 100644 include/asm-microblaze/of_platform.h
create mode 100644 include/asm-microblaze/prom.h

diff --git a/arch/microblaze/kernel/prom.c b/arch/microblaze/kernel/prom.c
new file mode 100644
index 0000000..7c9793a
--- /dev/null
+++ b/arch/microblaze/kernel/prom.c
@@ -0,0 +1,1653 @@
+/*
+ * 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
+ *
+ * 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.
+ */
+
+#undef DEBUG
+
+#include <stdarg.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/threads.h>
+#include <linux/spinlock.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/stringify.h>
+#include <linux/delay.h>
+#include <linux/initrd.h>
+#include <linux/bitops.h>
+#include <linux/module.h>
+#include <linux/kexec.h>
+#include <linux/debugfs.h>
+#include <linux/irq.h>
+#include <linux/lmb.h>
+
+#include <asm/prom.h>
+#include <asm/page.h>
+#include <asm/processor.h>
+#include <asm/irq.h>
+#include <asm/io.h>
+#include <asm/system.h>
+#include <asm/mmu.h>
+#include <asm/pgtable.h>
+#include <asm/pci.h>
+#include <asm/sections.h>
+#include <asm/pci-bridge.h>
+
+#ifdef CONFIG_PPC_PSERIES
+#include <asm/rtas.h>
+#include <asm/kdump.h>
+#include <asm/smp.h>
+#include <asm/iommu.h>
+#include <asm/btext.h>
+#include <asm/machdep.h>
+#include <asm/pSeries_reconfig.h>
+#include <asm/phyp_dump.h>
+#include <asm/kexec.h>
+#endif
+
+static int __initdata dt_root_addr_cells;
+static int __initdata dt_root_size_cells;
+
+#ifdef CONFIG_PPC64
+int __initdata iommu_is_off;
+int __initdata iommu_force_on;
+unsigned long tce_alloc_start, tce_alloc_end;
+#endif
+
+typedef u32 cell_t;
+
+#if 0
+static struct boot_param_header *initial_boot_params __initdata;
+#else
+struct boot_param_header *initial_boot_params;
+#endif
+
+extern struct device_node *allnodes; /* temporary while merging */
+
+extern rwlock_t devtree_lock; /* temporary while merging */
+
+/* export that to outside world */
+struct device_node *of_chosen;
+
+static inline char *find_flat_dt_string(u32 offset)
+{
+ return ((char *)initial_boot_params) +
+ initial_boot_params->off_dt_strings + offset;
+}
+
+/**
+ * This function is used to scan the flattened device-tree, it is
+ * used to extract the memory informations at boot before we can
+ * unflatten the tree
+ */
+int __init of_scan_flat_dt(int (*it)(unsigned long node,
+ const char *uname, int depth,
+ void *data),
+ void *data)
+{
+ unsigned long p = ((unsigned long)initial_boot_params) +
+ initial_boot_params->off_dt_struct;
+ int rc = 0;
+ int depth = -1;
+
+ do {
+ u32 tag = *((u32 *)p);
+ char *pathp;
+
+ p += 4;
+ if (tag == OF_DT_END_NODE) {
+ depth--;
+ continue;
+ }
+ if (tag == OF_DT_NOP)
+ continue;
+ if (tag == OF_DT_END)
+ break;
+ if (tag == OF_DT_PROP) {
+ u32 sz = *((u32 *)p);
+ p += 8;
+ if (initial_boot_params->version < 0x10)
+ p = _ALIGN(p, sz >= 8 ? 8 : 4);
+ p += sz;
+ p = _ALIGN(p, 4);
+ continue;
+ }
+ if (tag != OF_DT_BEGIN_NODE) {
+ printk(KERN_WARNING "Invalid tag %x scanning flattened"
+ " device tree !\n", tag);
+ return -EINVAL;
+ }
+ depth++;
+ pathp = (char *)p;
+ p = _ALIGN(p + strlen(pathp) + 1, 4);
+ if ((*pathp) == '/') {
+ char *lp, *np;
+ for (lp = NULL, np = pathp; *np; np++)
+ if ((*np) == '/')
+ lp = np+1;
+ if (lp != NULL)
+ pathp = lp;
+ }
+ rc = it(p, pathp, depth, data);
+ if (rc != 0)
+ break;
+ } while (1);
+
+ return rc;
+}
+
+unsigned long __init of_get_flat_dt_root(void)
+{
+ unsigned long p = ((unsigned long)initial_boot_params) +
+ initial_boot_params->off_dt_struct;
+
+ while (*((u32 *)p) == OF_DT_NOP)
+ p += 4;
+ BUG_ON(*((u32 *)p) != OF_DT_BEGIN_NODE);
+ p += 4;
+ return _ALIGN(p + strlen((char *)p) + 1, 4);
+}
+
+/**
+ * This function can be used within scan_flattened_dt callback to get
+ * access to properties
+ */
+void* __init of_get_flat_dt_prop(unsigned long node, const char *name,
+ unsigned long *size)
+{
+ unsigned long p = node;
+
+ do {
+ u32 tag = *((u32 *)p);
+ u32 sz, noff;
+ const char *nstr;
+
+ p += 4;
+ if (tag == OF_DT_NOP)
+ continue;
+ if (tag != OF_DT_PROP)
+ return NULL;
+
+ sz = *((u32 *)p);
+ noff = *((u32 *)(p + 4));
+ p += 8;
+ if (initial_boot_params->version < 0x10)
+ p = _ALIGN(p, sz >= 8 ? 8 : 4);
+
+ nstr = find_flat_dt_string(noff);
+ if (nstr == NULL) {
+ printk(KERN_WARNING "Can't find property index"
+ " name !\n");
+ return NULL;
+ }
+ if (strcmp(name, nstr) == 0) {
+ if (size)
+ *size = sz;
+ return (void *)p;
+ }
+ p += sz;
+ p = _ALIGN(p, 4);
+ } while (1);
+}
+
+int __init of_flat_dt_is_compatible(unsigned long node, const char *compat)
+{
+ const char *cp;
+ unsigned long cplen, l;
+
+ cp = of_get_flat_dt_prop(node, "compatible", &cplen);
+ if (cp == NULL)
+ return 0;
+ while (cplen > 0) {
+ if (strncasecmp(cp, compat, strlen(compat)) == 0)
+ return 1;
+ l = strlen(cp) + 1;
+ cp += l;
+ cplen -= l;
+ }
+
+ return 0;
+}
+
+static void *__init unflatten_dt_alloc(unsigned long *mem, unsigned long size,
+ unsigned long align)
+{
+ void *res;
+
+ *mem = _ALIGN(*mem, align);
+ res = (void *)*mem;
+ *mem += size;
+
+ return res;
+}
+
+static unsigned long __init unflatten_dt_node(unsigned long mem,
+ unsigned long *p,
+ struct device_node *dad,
+ struct device_node ***allnextpp,
+ unsigned long fpsize)
+{
+ struct device_node *np;
+ struct property *pp, **prev_pp = NULL;
+ char *pathp;
+ u32 tag;
+ unsigned int l, allocl;
+ int has_name = 0;
+ int new_format = 0;
+
+ tag = *((u32 *)(*p));
+ if (tag != OF_DT_BEGIN_NODE) {
+ printk("Weird tag at start of node: %x\n", tag);
+ return mem;
+ }
+ *p += 4;
+ pathp = (char *)*p;
+ l = allocl = strlen(pathp) + 1;
+ *p = _ALIGN(*p + l, 4);
+
+ /* version 0x10 has a more compact unit name here instead of the full
+ * path. we accumulate the full path size using "fpsize", we'll rebuild
+ * it later. We detect this because the first character of the name is
+ * not '/'.
+ */
+ if ((*pathp) != '/') {
+ new_format = 1;
+ if (fpsize == 0) {
+ /* root node: special case. fpsize accounts for path
+ * plus terminating zero. root node only has '/', so
+ * fpsize should be 2, but we want to avoid the first
+ * level nodes to have two '/' so we use fpsize 1 here
+ */
+ fpsize = 1;
+ allocl = 2;
+ } else {
+ /* account for '/' and path size minus terminal 0
+ * already in 'l'
+ */
+ fpsize += l;
+ allocl = fpsize;
+ }
+ }
+
+ np = unflatten_dt_alloc(&mem, sizeof(struct device_node) + allocl,
+ __alignof__(struct device_node));
+ if (allnextpp) {
+ memset(np, 0, sizeof(*np));
+ np->full_name = ((char *)np) + sizeof(struct device_node);
+ if (new_format) {
+ char *p = np->full_name;
+ /* rebuild full path for new format */
+ if (dad && dad->parent) {
+ strcpy(p, dad->full_name);
+#ifdef DEBUG
+ if ((strlen(p) + l + 1) != allocl) {
+ pr_debug("%s: p: %d, l: %d, a: %d\n",
+ pathp, (int)strlen(p),
+ l, allocl);
+ }
+#endif
+ p += strlen(p);
+ }
+ *(p++) = '/';
+ memcpy(p, pathp, l);
+ } else
+ memcpy(np->full_name, pathp, l);
+ prev_pp = &np->properties;
+ **allnextpp = np;
+ *allnextpp = &np->allnext;
+ if (dad != NULL) {
+ np->parent = dad;
+ /* we temporarily use the next field as `last_child'*/
+ if (dad->next == 0)
+ dad->child = np;
+ else
+ dad->next->sibling = np;
+ dad->next = np;
+ }
+ kref_init(&np->kref);
+ }
+ while (1) {
+ u32 sz, noff;
+ char *pname;
+
+ tag = *((u32 *)(*p));
+ if (tag == OF_DT_NOP) {
+ *p += 4;
+ continue;
+ }
+ if (tag != OF_DT_PROP)
+ break;
+ *p += 4;
+ sz = *((u32 *)(*p));
+ noff = *((u32 *)((*p) + 4));
+ *p += 8;
+ if (initial_boot_params->version < 0x10)
+ *p = _ALIGN(*p, sz >= 8 ? 8 : 4);
+
+ pname = find_flat_dt_string(noff);
+ if (pname == NULL) {
+ printk(KERN_INFO
+ "Can't find property name in list !\n");
+ break;
+ }
+ if (strcmp(pname, "name") == 0)
+ has_name = 1;
+ l = strlen(pname) + 1;
+ pp = unflatten_dt_alloc(&mem, sizeof(struct property),
+ __alignof__(struct property));
+ if (allnextpp) {
+ if (strcmp(pname, "linux,phandle") == 0) {
+ np->node = *((u32 *)*p);
+ if (np->linux_phandle == 0)
+ np->linux_phandle = np->node;
+ }
+ if (strcmp(pname, "ibm,phandle") == 0)
+ np->linux_phandle = *((u32 *)*p);
+ pp->name = pname;
+ pp->length = sz;
+ pp->value = (void *)*p;
+ *prev_pp = pp;
+ prev_pp = &pp->next;
+ }
+ *p = _ALIGN((*p) + sz, 4);
+ }
+ /* with version 0x10 we may not have the name property, recreate
+ * it here from the unit name if absent
+ */
+ if (!has_name) {
+ char *p = pathp, *ps = pathp, *pa = NULL;
+ int sz;
+
+ while (*p) {
+ if ((*p) == '@')
+ pa = p;
+ if ((*p) == '/')
+ ps = p + 1;
+ p++;
+ }
+ if (pa < ps)
+ pa = p;
+ sz = (pa - ps) + 1;
+ pp = unflatten_dt_alloc(&mem, sizeof(struct property) + sz,
+ __alignof__(struct property));
+ if (allnextpp) {
+ pp->name = "name";
+ pp->length = sz;
+ pp->value = pp + 1;
+ *prev_pp = pp;
+ prev_pp = &pp->next;
+ memcpy(pp->value, ps, sz - 1);
+ ((char *)pp->value)[sz - 1] = 0;
+ pr_debug("fixed up name for %s -> %s\n", pathp,
+ (char *)pp->value);
+ }
+ }
+ if (allnextpp) {
+ *prev_pp = NULL;
+ np->name = of_get_property(np, "name", NULL);
+ np->type = of_get_property(np, "device_type", NULL);
+
+ if (!np->name)
+ np->name = "<NULL>";
+ if (!np->type)
+ np->type = "<NULL>";
+ }
+ while (tag == OF_DT_BEGIN_NODE) {
+ mem = unflatten_dt_node(mem, p, np, allnextpp, fpsize);
+ tag = *((u32 *)(*p));
+ }
+ if (tag != OF_DT_END_NODE) {
+ printk(KERN_INFO "Weird tag at end of node: %x\n", tag);
+ return mem;
+ }
+ *p += 4;
+ return mem;
+}
+
+#ifdef CONFIG_PPC_PSERIES
+static int __init early_parse_mem(char *p)
+{
+ if (!p)
+ return 1;
+
+ memory_limit = PAGE_ALIGN(memparse(p, &p));
+ pr_debug("memory limit = 0x%lx\n", memory_limit);
+
+ return 0;
+}
+early_param("mem", early_parse_mem);
+
+/**
+ * move_device_tree - move tree to an unused area, if needed.
+ *
+ * The device tree may be allocated beyond our memory limit, or inside the
+ * crash kernel region for kdump. If so, move it out of the way.
+ */
+static void __init move_device_tree(void)
+{
+ unsigned long start, size;
+ void *p;
+
+ pr_debug("-> move_device_tree\n");
+
+ start = __pa(initial_boot_params);
+ size = initial_boot_params->totalsize;
+
+ if ((memory_limit && (start + size) > memory_limit) ||
+ overlaps_crashkernel(start, size)) {
+ p = __va(lmb_alloc_base(size, PAGE_SIZE, lmb.rmo_size));
+ memcpy(p, initial_boot_params, size);
+ initial_boot_params = (struct boot_param_header *)p;
+ pr_debug("Moved device tree to 0x%p\n", p);
+ }
+
+ pr_debug("<- move_device_tree\n");
+}
+#endif
+
+/**
+ * unflattens the device-tree passed by the firmware, creating the
+ * tree of struct device_node. It also fills the "name" and "type"
+ * pointers of the nodes so the normal device-tree walking functions
+ * can be used (this used to be done by finish_device_tree)
+ */
+void __init unflatten_device_tree(void)
+{
+ unsigned long start, mem, size;
+ struct device_node **allnextp = &allnodes;
+
+ pr_debug(" -> unflatten_device_tree()\n");
+
+ /* First pass, scan for size */
+ start = ((unsigned long)initial_boot_params) +
+ initial_boot_params->off_dt_struct;
+ size = unflatten_dt_node(0, &start, NULL, NULL, 0);
+ size = (size | 3) + 1;
+
+ pr_debug(" size is %lx, allocating...\n", size);
+
+ /* Allocate memory for the expanded device tree */
+ mem = lmb_alloc(size + 4, __alignof__(struct device_node));
+ mem = (unsigned long) __va(mem);
+
+ ((u32 *)mem)[size / 4] = 0xdeadbeef;
+
+ pr_debug(" unflattening %lx...\n", mem);
+
+ /* Second pass, do actual unflattening */
+ start = ((unsigned long)initial_boot_params) +
+ initial_boot_params->off_dt_struct;
+ unflatten_dt_node(mem, &start, NULL, &allnextp, 0);
+ if (*((u32 *)start) != OF_DT_END)
+ printk(KERN_WARNING "Weird tag at end of tree: %08x\n",
+ *((u32 *)start));
+ if (((u32 *)mem)[size / 4] != 0xdeadbeef)
+ printk(KERN_WARNING "End of tree marker overwritten: %08x\n",
+ ((u32 *)mem)[size / 4]);
+ *allnextp = NULL;
+
+ /* Get pointer to OF "/chosen" node for use everywhere */
+ of_chosen = of_find_node_by_path("/chosen");
+ if (of_chosen == NULL)
+ of_chosen = of_find_node_by_path("/chosen@0");
+
+ pr_debug(" <- unflatten_device_tree()\n");
+}
+
+#ifdef CONFIG_PPC_PSERIES
+/*
+ * ibm,pa-features is a per-cpu property that contains a string of
+ * attribute descriptors, each of which has a 2 byte header plus up
+ * to 254 bytes worth of processor attribute bits. First header
+ * byte specifies the number of bytes following the header.
+ * Second header byte is an "attribute-specifier" type, of which
+ * zero is the only currently-defined value.
+ * Implementation: Pass in the byte and bit offset for the feature
+ * that we are interested in. The function will return -1 if the
+ * pa-features property is missing, or a 1/0 to indicate if the feature
+ * is supported/not supported. Note that the bit numbers are
+ * big-endian to match the definition in PAPR.
+ */
+static struct ibm_pa_feature {
+ unsigned long cpu_features; /* CPU_FTR_xxx bit */
+ unsigned int cpu_user_ftrs; /* PPC_FEATURE_xxx bit */
+ unsigned char pabyte; /* byte number in ibm,pa-features */
+ unsigned char pabit; /* bit number (big-endian) */
+ unsigned char invert; /* if 1, pa bit set => clear feature */
+} ibm_pa_features[] __initdata = {
+ {0, PPC_FEATURE_HAS_MMU, 0, 0, 0},
+ {0, PPC_FEATURE_HAS_FPU, 0, 1, 0},
+ {CPU_FTR_SLB, 0, 0, 2, 0},
+ {CPU_FTR_CTRL, 0, 0, 3, 0},
+ {CPU_FTR_NOEXECUTE, 0, 0, 6, 0},
+ {CPU_FTR_NODSISRALIGN, 0, 1, 1, 1},
+ {CPU_FTR_CI_LARGE_PAGE, 0, 1, 2, 0},
+ {CPU_FTR_REAL_LE, PPC_FEATURE_TRUE_LE, 5, 0, 0},
+};
+
+static void __init scan_features(unsigned long node, unsigned char *ftrs,
+ unsigned long tablelen,
+ struct ibm_pa_feature *fp,
+ unsigned long ft_size)
+{
+ unsigned long i, len, bit;
+
+ /* find descriptor with type == 0 */
+ for (;;) {
+ if (tablelen < 3)
+ return;
+ len = 2 + ftrs[0];
+ if (tablelen < len)
+ return; /* descriptor 0 not found */
+ if (ftrs[1] == 0)
+ break;
+ tablelen -= len;
+ ftrs += len;
+ }
+
+ /* loop over bits we know about */
+ for (i = 0; i < ft_size; ++i, ++fp) {
+ if (fp->pabyte >= ftrs[0])
+ continue;
+ bit = (ftrs[2 + fp->pabyte] >> (7 - fp->pabit)) & 1;
+ if (bit ^ fp->invert) {
+ cur_cpu_spec->cpu_features |= fp->cpu_features;
+ cur_cpu_spec->cpu_user_features |= fp->cpu_user_ftrs;
+ } else {
+ cur_cpu_spec->cpu_features &= ~fp->cpu_features;
+ cur_cpu_spec->cpu_user_features &= ~fp->cpu_user_ftrs;
+ }
+ }
+}
+
+static void __init check_cpu_pa_features(unsigned long node)
+{
+ unsigned char *pa_ftrs;
+ unsigned long tablelen;
+
+ pa_ftrs = of_get_flat_dt_prop(node, "ibm,pa-features", &tablelen);
+ if (pa_ftrs == NULL)
+ return;
+
+ scan_features(node, pa_ftrs, tablelen,
+ ibm_pa_features, ARRAY_SIZE(ibm_pa_features));
+}
+
+#ifdef CONFIG_PPC64
+static void __init check_cpu_slb_size(unsigned long node)
+{
+ u32 *slb_size_ptr;
+
+ slb_size_ptr = of_get_flat_dt_prop(node, "ibm,slb-size", NULL);
+ if (slb_size_ptr != NULL) {
+ mmu_slb_size = *slb_size_ptr;
+ }
+}
+#else
+#define check_cpu_slb_size(node) do { } while(0)
+#endif
+
+static struct feature_property {
+ const char *name;
+ u32 min_value;
+ unsigned long cpu_feature;
+ unsigned long cpu_user_ftr;
+} feature_properties[] __initdata = {
+#ifdef CONFIG_ALTIVEC
+ {"altivec", 0, CPU_FTR_ALTIVEC, PPC_FEATURE_HAS_ALTIVEC},
+ {"ibm,vmx", 1, CPU_FTR_ALTIVEC, PPC_FEATURE_HAS_ALTIVEC},
+#endif /* CONFIG_ALTIVEC */
+#ifdef CONFIG_PPC64
+ {"ibm,dfp", 1, 0, PPC_FEATURE_HAS_DFP},
+ {"ibm,purr", 1, CPU_FTR_PURR, 0},
+ {"ibm,spurr", 1, CPU_FTR_SPURR, 0},
+#endif /* CONFIG_PPC64 */
+};
+
+#if defined(CONFIG_44x) && defined(CONFIG_PPC_FPU)
+static inline void identical_pvr_fixup(unsigned long node)
+{
+ unsigned int pvr;
+ char *model = of_get_flat_dt_prop(node, "model", NULL);
+
+ /*
+ * Since 440GR(x)/440EP(x) processors have the same pvr,
+ * we check the node path and set bit 28 in the cur_cpu_spec
+ * pvr for EP(x) processor version. This bit is always 0 in
+ * the "real" pvr. Then we call identify_cpu again with
+ * the new logical pvr to enable FPU support.
+ */
+ if (model && strstr(model, "440EP")) {
+ pvr = cur_cpu_spec->pvr_value | 0x8;
+ identify_cpu(0, pvr);
+ DBG("Using logical pvr %x for %s\n", pvr, model);
+ }
+}
+#else
+#define identical_pvr_fixup(node) do { } while(0)
+#endif
+
+static void __init check_cpu_feature_properties(unsigned long node)
+{
+ unsigned long i;
+ struct feature_property *fp = feature_properties;
+ const u32 *prop;
+
+ for (i = 0; i < ARRAY_SIZE(feature_properties); ++i, ++fp) {
+ prop = of_get_flat_dt_prop(node, fp->name, NULL);
+ if (prop && *prop >= fp->min_value) {
+ cur_cpu_spec->cpu_features |= fp->cpu_feature;
+ cur_cpu_spec->cpu_user_features |= fp->cpu_user_ftr;
+ }
+ }
+}
+
+#endif /* CONFIG_PPC_PSERIES */
+
+static int __init early_init_dt_scan_cpus(unsigned long node,
+ const char *uname, int depth,
+ void *data)
+{
+ static int logical_cpuid;
+ char *type = of_get_flat_dt_prop(node, "device_type", NULL);
+#ifdef CONFIG_PPC_PSERIES
+ const u32 *prop;
+#endif
+ const u32 *intserv;
+ int i, nthreads;
+ unsigned long len;
+ int found = 0;
+
+ /* We are scanning "cpu" nodes only */
+ if (type == NULL || strcmp(type, "cpu") != 0)
+ return 0;
+
+ /* Get physical cpuid */
+ intserv = of_get_flat_dt_prop(node, "ibm,ppc-interrupt-server#s", &len);
+ if (intserv) {
+ nthreads = len / sizeof(int);
+ } else {
+ intserv = of_get_flat_dt_prop(node, "reg", NULL);
+ nthreads = 1;
+ }
+
+ /*
+ * Now see if any of these threads match our boot cpu.
+ * NOTE: This must match the parsing done in smp_setup_cpu_maps.
+ */
+ for (i = 0; i < nthreads; i++) {
+ /*
+ * version 2 of the kexec param format adds the phys cpuid of
+ * booted proc.
+ */
+ if (initial_boot_params && initial_boot_params->version >= 2) {
+ if (intserv[i] ==
+ initial_boot_params->boot_cpuid_phys) {
+ found = 1;
+ break;
+ }
+ } else {
+ /*
+ * Check if it's the boot-cpu, set it's hw index now,
+ * unfortunately this format did not support booting
+ * off secondary threads.
+ */
+ if (of_get_flat_dt_prop(node,
+ "linux,boot-cpu", NULL) != NULL) {
+ found = 1;
+ break;
+ }
+ }
+
+#ifdef CONFIG_SMP
+ /* logical cpu id is always 0 on UP kernels */
+ logical_cpuid++;
+#endif
+ }
+
+ if (found) {
+ pr_debug("boot cpu: logical %d physical %d\n", logical_cpuid,
+ intserv[i]);
+ boot_cpuid = logical_cpuid;
+#ifdef CONFIG_PPC_PSERIES
+ set_hard_smp_processor_id(boot_cpuid, intserv[i]);
+
+ /*
+ * PAPR defines "logical" PVR values for cpus that
+ * meet various levels of the architecture:
+ * 0x0f000001 Architecture version 2.04
+ * 0x0f000002 Architecture version 2.05
+ * If the cpu-version property in the cpu node contains
+ * such a value, we call identify_cpu again with the
+ * logical PVR value in order to use the cpu feature
+ * bits appropriate for the architecture level.
+ *
+ * A POWER6 partition in "POWER6 architected" mode
+ * uses the 0x0f000002 PVR value; in POWER5+ mode
+ * it uses 0x0f000001.
+ */
+ prop = of_get_flat_dt_prop(node, "cpu-version", NULL);
+ if (prop && (*prop & 0xff000000) == 0x0f000000)
+ identify_cpu(0, *prop);
+
+ identical_pvr_fixup(node);
+#endif
+ }
+
+#ifdef CONFIG_PPC_PSERIES
+ check_cpu_feature_properties(node);
+ check_cpu_pa_features(node);
+ check_cpu_slb_size(node);
+
+ if (nthreads > 1)
+ cur_cpu_spec->cpu_features |= CPU_FTR_SMT;
+ else
+ cur_cpu_spec->cpu_features &= ~CPU_FTR_SMT;
+#endif
+ return 0;
+}
+
+#ifdef CONFIG_BLK_DEV_INITRD
+static void __init early_init_dt_check_for_initrd(unsigned long node)
+{
+ unsigned long l;
+ u32 *prop;
+
+ pr_debug("Looking for initrd properties... ");
+
+ prop = of_get_flat_dt_prop(node, "linux,initrd-start", &l);
+ if (prop) {
+ initrd_start = (unsigned long)__va(of_read_ulong(prop, l/4));
+
+ prop = of_get_flat_dt_prop(node, "linux,initrd-end", &l);
+ if (prop) {
+ initrd_end = (unsigned long)
+ __va(of_read_ulong(prop, l/4));
+ initrd_below_start_ok = 1;
+ } else {
+ initrd_start = 0;
+ }
+ }
+
+ pr_debug("initrd_start=0x%lx initrd_end=0x%lx\n",
+ initrd_start, initrd_end);
+}
+#else
+static inline void early_init_dt_check_for_initrd(unsigned long node)
+{
+}
+#endif /* CONFIG_BLK_DEV_INITRD */
+
+static int __init early_init_dt_scan_chosen(unsigned long node,
+ const char *uname, int depth, void *data)
+{
+ unsigned long l;
+ char *p;
+
+ pr_debug("search \"chosen\", depth: %d, uname: %s\n", depth, uname);
+
+ if (depth != 1 ||
+ (strcmp(uname, "chosen") != 0 &&
+ strcmp(uname, "chosen@0") != 0))
+ return 0;
+
+#ifdef CONFIG_PPC64
+ /* check if iommu is forced on or off */
+ if (of_get_flat_dt_prop(node, "linux,iommu-off", NULL) != NULL)
+ iommu_is_off = 1;
+ if (of_get_flat_dt_prop(node, "linux,iommu-force-on", NULL) != NULL)
+ iommu_force_on = 1;
+#endif
+
+#ifdef CONFIG_PPC_PSERIES
+ /* mem=x on the command line is the preferred mechanism */
+ lprop = of_get_flat_dt_prop(node, "linux,memory-limit", NULL);
+ if (lprop)
+ memory_limit = *lprop;
+#endif
+
+#ifdef CONFIG_PPC64
+ lprop = of_get_flat_dt_prop(node, "linux,tce-alloc-start", NULL);
+ if (lprop)
+ tce_alloc_start = *lprop;
+ lprop = of_get_flat_dt_prop(node, "linux,tce-alloc-end", NULL);
+ if (lprop)
+ tce_alloc_end = *lprop;
+#endif
+
+#ifdef CONFIG_KEXEC
+ lprop = (u64 *)of_get_flat_dt_prop(node,
+ "linux,crashkernel-base", NULL);
+ if (lprop)
+ crashk_res.start = *lprop;
+
+ lprop = (u64 *)of_get_flat_dt_prop(node,
+ "linux,crashkernel-size", NULL);
+ if (lprop)
+ crashk_res.end = crashk_res.start + *lprop - 1;
+#endif
+
+ early_init_dt_check_for_initrd(node);
+
+ /* Retreive command line */
+ p = of_get_flat_dt_prop(node, "bootargs", &l);
+ if (p != NULL && l > 0)
+ strlcpy(cmd_line, p, min((int)l, COMMAND_LINE_SIZE));
+
+#ifdef CONFIG_CMDLINE
+ if (p == NULL || l == 0 || (l == 1 && (*p) == 0))
+ strlcpy(cmd_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
+#endif /* CONFIG_CMDLINE */
+
+ pr_debug("Command line is: %s\n", cmd_line);
+
+ /* break now */
+ return 1;
+}
+
+static int __init early_init_dt_scan_root(unsigned long node,
+ const char *uname, int depth, void *data)
+{
+ u32 *prop;
+
+ if (depth != 0)
+ return 0;
+
+ prop = of_get_flat_dt_prop(node, "#size-cells", NULL);
+ dt_root_size_cells = (prop == NULL) ? 1 : *prop;
+ pr_debug("dt_root_size_cells = %x\n", dt_root_size_cells);
+
+ prop = of_get_flat_dt_prop(node, "#address-cells", NULL);
+ dt_root_addr_cells = (prop == NULL) ? 2 : *prop;
+ pr_debug("dt_root_addr_cells = %x\n", dt_root_addr_cells);
+
+ /* break now */
+ return 1;
+}
+
+static u64 __init dt_mem_next_cell(int s, cell_t **cellp)
+{
+ cell_t *p = *cellp;
+
+ *cellp = p + s;
+ return of_read_number(p, s);
+}
+
+#ifdef CONFIG_PPC_PSERIES
+/*
+ * Interpret the ibm,dynamic-memory property in the
+ * /ibm,dynamic-reconfiguration-memory node.
+ * This contains a list of memory blocks along with NUMA affinity
+ * information.
+ */
+static int __init early_init_dt_scan_drconf_memory(unsigned long node)
+{
+ cell_t *dm, *ls;
+ unsigned long l, n, flags;
+ u64 base, size, lmb_size;
+
+ ls = (cell_t *)of_get_flat_dt_prop(node, "ibm,lmb-size", &l);
+ if (ls == NULL || l < dt_root_size_cells * sizeof(cell_t))
+ return 0;
+ lmb_size = dt_mem_next_cell(dt_root_size_cells, &ls);
+
+ dm = (cell_t *)of_get_flat_dt_prop(node, "ibm,dynamic-memory", &l);
+ if (dm == NULL || l < sizeof(cell_t))
+ return 0;
+
+ n = *dm++; /* number of entries */
+ if (l < (n * (dt_root_addr_cells + 4) + 1) * sizeof(cell_t))
+ return 0;
+
+ for (; n != 0; --n) {
+ base = dt_mem_next_cell(dt_root_addr_cells, &dm);
+ flags = dm[3];
+ /* skip DRC index, pad, assoc. list index, flags */
+ dm += 4;
+ /* skip this block if the reserved bit is set in flags (0x80)
+ or if the block is not assigned to this partition (0x8) */
+ if ((flags & 0x80) || !(flags & 0x8))
+ continue;
+ size = lmb_size;
+ if (iommu_is_off) {
+ if (base >= 0x80000000ul)
+ continue;
+ if ((base + size) > 0x80000000ul)
+ size = 0x80000000ul - base;
+ }
+ lmb_add(base, size);
+ }
+ lmb_dump_all();
+ return 0;
+}
+#else
+#define early_init_dt_scan_drconf_memory(node) 0
+#endif /* CONFIG_PPC_PSERIES */
+
+static int __init early_init_dt_scan_memory(unsigned long node,
+ const char *uname, int depth, void *data)
+{
+ char *type = of_get_flat_dt_prop(node, "device_type", NULL);
+ cell_t *reg, *endp;
+ unsigned long l;
+
+ /* Look for the ibm,dynamic-reconfiguration-memory node */
+ if (depth == 1 &&
+ strcmp(uname, "ibm,dynamic-reconfiguration-memory") == 0)
+ return early_init_dt_scan_drconf_memory(node);
+
+ /* We are scanning "memory" nodes only */
+ if (type == NULL) {
+ /*
+ * The longtrail doesn't have a device_type on the
+ * /memory node, so look for the node called /memory@0.
+ */
+ if (depth != 1 || strcmp(uname, "memory@0") != 0)
+ return 0;
+ } else if (strcmp(type, "memory") != 0)
+ return 0;
+
+ reg = (cell_t *)of_get_flat_dt_prop(node, "linux,usable-memory", &l);
+ if (reg == NULL)
+ reg = (cell_t *)of_get_flat_dt_prop(node, "reg", &l);
+ if (reg == NULL)
+ return 0;
+
+ endp = reg + (l / sizeof(cell_t));
+
+ pr_debug("memory scan node %s, reg size %ld, data: %x %x %x %x,\n",
+ uname, l, reg[0], reg[1], reg[2], reg[3]);
+
+ while ((endp - reg) >= (dt_root_addr_cells + dt_root_size_cells)) {
+ u64 base, size;
+
+ base = dt_mem_next_cell(dt_root_addr_cells, &reg);
+ size = dt_mem_next_cell(dt_root_size_cells, &reg);
+
+ if (size == 0)
+ continue;
+ pr_debug(" - %llx , %llx\n", (unsigned long long)base,
+ (unsigned long long)size);
+
+#ifdef CONFIG_PPC64
+ if (iommu_is_off) {
+ if (base >= 0x80000000ul)
+ continue;
+ if ((base + size) > 0x80000000ul)
+ size = 0x80000000ul - base;
+ }
+#endif
+ lmb_add(base, size);
+ }
+ return 0;
+}
+
+#ifdef CONFIG_PPC_PSERIES
+static void __init early_reserve_mem(void)
+{
+ u64 base, size;
+ u64 *reserve_map;
+ unsigned long self_base;
+ unsigned long self_size;
+
+ reserve_map = (u64 *)(((unsigned long)initial_boot_params) +
+ initial_boot_params->off_mem_rsvmap);
+
+ /* before we do anything, lets reserve the dt blob */
+ self_base = __pa((unsigned long)initial_boot_params);
+ self_size = initial_boot_params->totalsize;
+ lmb_reserve(self_base, self_size);
+
+#ifdef CONFIG_BLK_DEV_INITRD
+ /* then reserve the initrd, if any */
+ if (initrd_start && (initrd_end > initrd_start))
+ lmb_reserve(__pa(initrd_start), initrd_end - initrd_start);
+#endif /* CONFIG_BLK_DEV_INITRD */
+
+#ifdef CONFIG_PPC32
+ /*
+ * Handle the case where we might be booting from an old kexec
+ * image that setup the mem_rsvmap as pairs of 32-bit values
+ */
+ if (*reserve_map > 0xffffffffull) {
+ u32 base_32, size_32;
+ u32 *reserve_map_32 = (u32 *)reserve_map;
+
+ while (1) {
+ base_32 = *(reserve_map_32++);
+ size_32 = *(reserve_map_32++);
+ if (size_32 == 0)
+ break;
+ /* skip if the reservation is for the blob */
+ if (base_32 == self_base && size_32 == self_size)
+ continue;
+ pr_debug("reserving: %x -> %x\n", base_32, size_32);
+ lmb_reserve(base_32, size_32);
+ }
+ return;
+ }
+#endif
+ while (1) {
+ base = *(reserve_map++);
+ size = *(reserve_map++);
+ if (size == 0)
+ break;
+ pr_debug("reserving: %llx -> %llx\n", base, size);
+ lmb_reserve(base, size);
+ }
+
+#if 0
+ pr_debug("memory reserved, lmbs :\n");
+ lmb_dump_all();
+#endif
+}
+#endif
+
+#ifdef CONFIG_PHYP_DUMP
+/**
+ * phyp_dump_calculate_reserve_size() - reserve variable boot area 5% or arg
+ *
+ * Function to find the largest size we need to reserve
+ * during early boot process.
+ *
+ * It either looks for boot param and returns that OR
+ * returns larger of 256 or 5% rounded down to multiples of 256MB.
+ *
+ */
+static inline unsigned long phyp_dump_calculate_reserve_size(void)
+{
+ unsigned long tmp;
+
+ if (phyp_dump_info->reserve_bootvar)
+ return phyp_dump_info->reserve_bootvar;
+
+ /* divide by 20 to get 5% of value */
+ tmp = lmb_end_of_DRAM();
+ do_div(tmp, 20);
+
+ /* round it down in multiples of 256 */
+ tmp = tmp & ~0x0FFFFFFFUL;
+
+ return (tmp > PHYP_DUMP_RMR_END ? tmp : PHYP_DUMP_RMR_END);
+}
+
+/**
+ * phyp_dump_reserve_mem() - reserve all not-yet-dumped mmemory
+ *
+ * This routine may reserve memory regions in the kernel only
+ * if the system is supported and a dump was taken in last
+ * boot instance or if the hardware is supported and the
+ * scratch area needs to be setup. In other instances it returns
+ * without reserving anything. The memory in case of dump being
+ * active is freed when the dump is collected (by userland tools).
+ */
+static void __init phyp_dump_reserve_mem(void)
+{
+ unsigned long base, size;
+ unsigned long variable_reserve_size;
+
+ if (!phyp_dump_info->phyp_dump_configured) {
+ printk(KERN_ERR "Phyp-dump not supported on this hardware\n");
+ return;
+ }
+
+ if (!phyp_dump_info->phyp_dump_at_boot) {
+ printk(KERN_INFO "Phyp-dump disabled at boot time\n");
+ return;
+ }
+
+ variable_reserve_size = phyp_dump_calculate_reserve_size();
+
+ if (phyp_dump_info->phyp_dump_is_active) {
+ /* Reserve *everything* above RMR.Area freed by userland tools*/
+ base = variable_reserve_size;
+ size = lmb_end_of_DRAM() - base;
+
+ /* XXX crashed_ram_end is wrong, since it may be beyond
+ * the memory_limit, it will need to be adjusted. */
+ lmb_reserve(base, size);
+
+ phyp_dump_info->init_reserve_start = base;
+ phyp_dump_info->init_reserve_size = size;
+ } else {
+ size = phyp_dump_info->cpu_state_size +
+ phyp_dump_info->hpte_region_size +
+ variable_reserve_size;
+ base = lmb_end_of_DRAM() - size;
+ lmb_reserve(base, size);
+ phyp_dump_info->init_reserve_start = base;
+ phyp_dump_info->init_reserve_size = size;
+ }
+}
+#else
+static inline void __init phyp_dump_reserve_mem(void) {}
+#endif /* CONFIG_PHYP_DUMP && CONFIG_PPC_RTAS */
+
+void __init early_init_devtree(void *params)
+{
+ pr_debug(" -> early_init_devtree(%p)\n", params);
+
+ /* Setup flat device-tree pointer */
+ initial_boot_params = params;
+
+#ifdef CONFIG_PPC_RTAS
+ /* Some machines might need RTAS info for debugging, grab it now. */
+ of_scan_flat_dt(early_init_dt_scan_rtas, NULL);
+#endif
+
+#ifdef CONFIG_PHYP_DUMP
+ /* scan tree to see if dump occured during last boot */
+ of_scan_flat_dt(early_init_dt_scan_phyp_dump, NULL);
+#endif
+
+ /* Retrieve various informations from the /chosen node of the
+ * device-tree, including the platform type, initrd location and
+ * size, TCE reserve, and more ...
+ */
+ of_scan_flat_dt(early_init_dt_scan_chosen, NULL);
+
+ /* Scan memory nodes and rebuild LMBs */
+ lmb_init();
+ of_scan_flat_dt(early_init_dt_scan_root, NULL);
+ of_scan_flat_dt(early_init_dt_scan_memory, NULL);
+
+ /* Save command line for /proc/cmdline and then parse parameters */
+ strlcpy(boot_command_line, cmd_line, COMMAND_LINE_SIZE);
+ parse_early_param();
+
+#ifdef CONFIG_PPC_PSERIES
+ /* Reserve LMB regions used by kernel, initrd, dt, etc... */
+ lmb_reserve(PHYSICAL_START, __pa(klimit) - PHYSICAL_START);
+ reserve_kdump_trampoline();
+ reserve_crashkernel();
+ early_reserve_mem();
+ phyp_dump_reserve_mem();
+
+ lmb_enforce_memory_limit(memory_limit);
+#endif
+
+ lmb_analyze();
+
+ pr_debug("Phys. mem: %lx\n", lmb_phys_mem_size());
+
+#ifdef CONFIG_PPC_PSERIES
+ /* We may need to relocate the flat tree, do it now.
+ * FIXME .. and the initrd too? */
+ move_device_tree();
+#endif
+ pr_debug("Scanning CPUs ...\n");
+
+ /* Retreive CPU related informations from the flat tree
+ * (altivec support, boot CPU ID, ...)
+ */
+ of_scan_flat_dt(early_init_dt_scan_cpus, NULL);
+
+ pr_debug(" <- early_init_devtree()\n");
+}
+
+/**
+ * Indicates whether the root node has a given value in its
+ * compatible property.
+ */
+int machine_is_compatible(const char *compat)
+{
+ struct device_node *root;
+ int rc = 0;
+
+ root = of_find_node_by_path("/");
+ if (root) {
+ rc = of_device_is_compatible(root, compat);
+ of_node_put(root);
+ }
+ return rc;
+}
+EXPORT_SYMBOL(machine_is_compatible);
+
+/*******
+ *
+ * New implementation of the OF "find" APIs, return a refcounted
+ * object, call of_node_put() when done. The device tree and list
+ * are protected by a rw_lock.
+ *
+ * Note that property management will need some locking as well,
+ * this isn't dealt with yet.
+ *
+ *******/
+
+/**
+ * of_find_node_by_phandle - Find a node given a phandle
+ * @handle: phandle of the node to find
+ *
+ * Returns a node pointer with refcount incremented, use
+ * of_node_put() on it when done.
+ */
+struct device_node *of_find_node_by_phandle(phandle handle)
+{
+ struct device_node *np;
+
+ read_lock(&devtree_lock);
+ for (np = allnodes; np != 0; np = np->allnext)
+ if (np->linux_phandle == handle)
+ break;
+ of_node_get(np);
+ read_unlock(&devtree_lock);
+ return np;
+}
+EXPORT_SYMBOL(of_find_node_by_phandle);
+
+/**
+ * of_find_all_nodes - Get next node in global list
+ * @prev: Previous node or NULL to start iteration
+ * of_node_put() will be called on it
+ *
+ * Returns a node pointer with refcount incremented, use
+ * of_node_put() on it when done.
+ */
+struct device_node *of_find_all_nodes(struct device_node *prev)
+{
+ struct device_node *np;
+
+ read_lock(&devtree_lock);
+ np = prev ? prev->allnext : allnodes;
+ for (; np != 0; np = np->allnext)
+ if (of_node_get(np))
+ break;
+ of_node_put(prev);
+ read_unlock(&devtree_lock);
+ return np;
+}
+EXPORT_SYMBOL(of_find_all_nodes);
+
+/**
+ * of_node_get - Increment refcount of a node
+ * @node: Node to inc refcount, NULL is supported to
+ * simplify writing of callers
+ *
+ * Returns node.
+ */
+struct device_node *of_node_get(struct device_node *node)
+{
+ if (node)
+ kref_get(&node->kref);
+ return node;
+}
+EXPORT_SYMBOL(of_node_get);
+
+static inline struct device_node *kref_to_device_node(struct kref *kref)
+{
+ return container_of(kref, struct device_node, kref);
+}
+
+/**
+ * of_node_release - release a dynamically allocated node
+ * @kref: kref element of the node to be released
+ *
+ * In of_node_put() this function is passed to kref_put()
+ * as the destructor.
+ */
+static void of_node_release(struct kref *kref)
+{
+ struct device_node *node = kref_to_device_node(kref);
+ struct property *prop = node->properties;
+
+ /* We should never be releasing nodes that haven't been detached. */
+ if (!of_node_check_flag(node, OF_DETACHED)) {
+ printk(KERN_INFO "WARNING: Bad of_node_put() on %s\n",
+ node->full_name);
+ dump_stack();
+ kref_init(&node->kref);
+ return;
+ }
+
+ if (!of_node_check_flag(node, OF_DYNAMIC))
+ return;
+
+ while (prop) {
+ struct property *next = prop->next;
+ kfree(prop->name);
+ kfree(prop->value);
+ kfree(prop);
+ prop = next;
+
+ if (!prop) {
+ prop = node->deadprops;
+ node->deadprops = NULL;
+ }
+ }
+ kfree(node->full_name);
+ kfree(node->data);
+ kfree(node);
+}
+
+/**
+ * of_node_put - Decrement refcount of a node
+ * @node: Node to dec refcount, NULL is supported to
+ * simplify writing of callers
+ *
+ */
+void of_node_put(struct device_node *node)
+{
+ if (node)
+ kref_put(&node->kref, of_node_release);
+}
+EXPORT_SYMBOL(of_node_put);
+
+/*
+ * Plug a device node into the tree and global list.
+ */
+void of_attach_node(struct device_node *np)
+{
+ unsigned long flags;
+
+ write_lock_irqsave(&devtree_lock, flags);
+ np->sibling = np->parent->child;
+ np->allnext = allnodes;
+ np->parent->child = np;
+ allnodes = np;
+ write_unlock_irqrestore(&devtree_lock, flags);
+}
+
+/*
+ * "Unplug" a node from the device tree. The caller must hold
+ * a reference to the node. The memory associated with the node
+ * is not freed until its refcount goes to zero.
+ */
+void of_detach_node(struct device_node *np)
+{
+ struct device_node *parent;
+ unsigned long flags;
+
+ write_lock_irqsave(&devtree_lock, flags);
+
+ parent = np->parent;
+ if (!parent)
+ goto out_unlock;
+
+ if (allnodes == np)
+ allnodes = np->allnext;
+ else {
+ struct device_node *prev;
+ for (prev = allnodes;
+ prev->allnext != np;
+ prev = prev->allnext)
+ ;
+ prev->allnext = np->allnext;
+ }
+
+ if (parent->child == np)
+ parent->child = np->sibling;
+ else {
+ struct device_node *prevsib;
+ for (prevsib = np->parent->child;
+ prevsib->sibling != np;
+ prevsib = prevsib->sibling)
+ ;
+ prevsib->sibling = np->sibling;
+ }
+
+ of_node_set_flag(np, OF_DETACHED);
+
+out_unlock:
+ write_unlock_irqrestore(&devtree_lock, flags);
+}
+
+#ifdef CONFIG_PPC_PSERIES
+/*
+ * Fix up the uninitialized fields in a new device node:
+ * name, type and pci-specific fields
+ */
+
+static int of_finish_dynamic_node(struct device_node *node)
+{
+ struct device_node *parent = of_get_parent(node);
+ int err = 0;
+ const phandle *ibm_phandle;
+
+ node->name = of_get_property(node, "name", NULL);
+ node->type = of_get_property(node, "device_type", NULL);
+
+ if (!node->name)
+ node->name = "<NULL>";
+ if (!node->type)
+ node->type = "<NULL>";
+
+ if (!parent) {
+ err = -ENODEV;
+ goto out;
+ }
+
+ /* We don't support that function on PowerMac, at least
+ * not yet
+ */
+ if (machine_is(powermac))
+ return -ENODEV;
+
+ /* fix up new node's linux_phandle field */
+ if ((ibm_phandle = of_get_property(node, "ibm,phandle", NULL)))
+ node->linux_phandle = *ibm_phandle;
+
+out:
+ of_node_put(parent);
+ return err;
+}
+
+static int prom_reconfig_notifier(struct notifier_block *nb,
+ unsigned long action, void *node)
+{
+ int err;
+
+ switch (action) {
+ case PSERIES_RECONFIG_ADD:
+ err = of_finish_dynamic_node(node);
+ if (err < 0) {
+ printk(KERN_ERR "finish_node returned %d\n", err);
+ err = NOTIFY_BAD;
+ }
+ break;
+ default:
+ err = NOTIFY_DONE;
+ break;
+ }
+ return err;
+}
+
+static struct notifier_block prom_reconfig_nb = {
+ .notifier_call = prom_reconfig_notifier,
+ .priority = 10, /* This one needs to run first */
+};
+
+static int __init prom_reconfig_setup(void)
+{
+ return pSeries_reconfig_notifier_register(&prom_reconfig_nb);
+}
+__initcall(prom_reconfig_setup);
+#endif
+
+/*
+ * Add a property to a node
+ */
+int prom_add_property(struct device_node *np, struct property *prop)
+{
+ struct property **next;
+ unsigned long flags;
+
+ prop->next = NULL;
+ write_lock_irqsave(&devtree_lock, flags);
+ next = &np->properties;
+ while (*next) {
+ if (strcmp(prop->name, (*next)->name) == 0) {
+ /* duplicate ! don't insert it */
+ write_unlock_irqrestore(&devtree_lock, flags);
+ return -1;
+ }
+ next = &(*next)->next;
+ }
+ *next = prop;
+ write_unlock_irqrestore(&devtree_lock, flags);
+
+#ifdef CONFIG_PROC_DEVICETREE
+ /* try to add to proc as well if it was initialized */
+ if (np->pde)
+ proc_device_tree_add_prop(np->pde, prop);
+#endif /* CONFIG_PROC_DEVICETREE */
+
+ return 0;
+}
+
+/*
+ * Remove a property from a node. Note that we don't actually
+ * remove it, since we have given out who-knows-how-many pointers
+ * to the data using get-property. Instead we just move the property
+ * to the "dead properties" list, so it won't be found any more.
+ */
+int prom_remove_property(struct device_node *np, struct property *prop)
+{
+ struct property **next;
+ unsigned long flags;
+ int found = 0;
+
+ write_lock_irqsave(&devtree_lock, flags);
+ next = &np->properties;
+ while (*next) {
+ if (*next == prop) {
+ /* found the node */
+ *next = prop->next;
+ prop->next = np->deadprops;
+ np->deadprops = prop;
+ found = 1;
+ break;
+ }
+ next = &(*next)->next;
+ }
+ write_unlock_irqrestore(&devtree_lock, flags);
+
+ if (!found)
+ return -ENODEV;
+
+#ifdef CONFIG_PROC_DEVICETREE
+ /* try to remove the proc node as well */
+ if (np->pde)
+ proc_device_tree_remove_prop(np->pde, prop);
+#endif /* CONFIG_PROC_DEVICETREE */
+
+ return 0;
+}
+
+/*
+ * Update a property in a node. Note that we don't actually
+ * remove it, since we have given out who-knows-how-many pointers
+ * to the data using get-property. Instead we just move the property
+ * to the "dead properties" list, and add the new property to the
+ * property list
+ */
+int prom_update_property(struct device_node *np,
+ struct property *newprop,
+ struct property *oldprop)
+{
+ struct property **next;
+ unsigned long flags;
+ int found = 0;
+
+ write_lock_irqsave(&devtree_lock, flags);
+ next = &np->properties;
+ while (*next) {
+ if (*next == oldprop) {
+ /* found the node */
+ newprop->next = oldprop->next;
+ *next = newprop;
+ oldprop->next = np->deadprops;
+ np->deadprops = oldprop;
+ found = 1;
+ break;
+ }
+ next = &(*next)->next;
+ }
+ write_unlock_irqrestore(&devtree_lock, flags);
+
+ if (!found)
+ return -ENODEV;
+
+#ifdef CONFIG_PROC_DEVICETREE
+ /* try to add to proc as well if it was initialized */
+ if (np->pde)
+ proc_device_tree_update_prop(np->pde, newprop, oldprop);
+#endif /* CONFIG_PROC_DEVICETREE */
+
+ return 0;
+}
+
+/* Find the device node for a given logical cpu number, also returns the cpu
+ * local thread number (index in ibm,interrupt-server#s) if relevant and
+ * asked for (non NULL)
+ */
+struct device_node *of_get_cpu_node(int cpu, unsigned int *thread)
+{
+ int hardid;
+ struct device_node *np;
+
+ hardid = boot_cpuid; /* get_hard_smp_processor_id(cpu);*/
+
+ for_each_node_by_type(np, "cpu") {
+ const u32 *intserv;
+ unsigned int plen, t;
+
+ /* Check for ibm,ppc-interrupt-server#s. If it doesn't exist
+ * fallback to "reg" property and assume no threads
+ */
+ intserv = of_get_property(np, "ibm,ppc-interrupt-server#s",
+ &plen);
+ if (intserv == NULL) {
+ const u32 *reg = of_get_property(np, "reg", NULL);
+ if (reg == NULL)
+ continue;
+ if (*reg == hardid) {
+ if (thread)
+ *thread = 0;
+ return np;
+ }
+ } else {
+ plen /= sizeof(u32);
+ for (t = 0; t < plen; t++) {
+ if (hardid == intserv[t]) {
+ if (thread)
+ *thread = t;
+ return np;
+ }
+ }
+ }
+ }
+ return NULL;
+}
+EXPORT_SYMBOL(of_get_cpu_node);
+
+#if defined(CONFIG_DEBUG_FS) && defined(DEBUG)
+static struct debugfs_blob_wrapper flat_dt_blob;
+
+static int __init export_flat_device_tree(void)
+{
+ struct dentry *d;
+
+ flat_dt_blob.data = initial_boot_params;
+ flat_dt_blob.size = initial_boot_params->totalsize;
+
+ d = debugfs_create_blob("flat-device-tree", S_IFREG | S_IRUSR,
+ of_debugfs_root, &flat_dt_blob);
+ if (!d)
+ return 1;
+
+ return 0;
+}
+__initcall(export_flat_device_tree);
+#endif
diff --git a/include/asm-microblaze/of_device.h b/include/asm-microblaze/of_device.h
new file mode 100644
index 0000000..5a324cf
--- /dev/null
+++ b/include/asm-microblaze/of_device.h
@@ -0,0 +1,41 @@
+/*
+ * include/asm-microblaze/of_device.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ */
+
+#ifndef _ASM_MICROBLAZE_OF_DEVICE_H
+#define _ASM_MICROBLAZE_OF_DEVICE_H
+#ifdef __KERNEL__
+
+#include <linux/device.h>
+#include <linux/of.h>
+
+/*
+ * The of_device is a kind of "base class" that is a superset of
+ * struct device for use by devices attached to an OF node and
+ * probed using OF properties.
+ */
+struct of_device {
+ struct device_node *node; /* to be obsoleted */
+ u64 dma_mask; /* DMA mask */
+ struct device dev; /* Generic device interface */
+};
+
+extern struct of_device *of_device_alloc(struct device_node *np,
+ const char *bus_id,
+ struct device *parent);
+
+extern ssize_t of_device_get_modalias(struct of_device *ofdev,
+ char *str, ssize_t len);
+extern int of_device_uevent(struct device *dev,
+ struct kobj_uevent_env *env);
+
+/* This is just here during the transition */
+#include <linux/of_device.h>
+
+#endif /* __KERNEL__ */
+#endif /* _ASM_MICROBLAZE_OF_DEVICE_H */
diff --git a/include/asm-microblaze/of_platform.h b/include/asm-microblaze/of_platform.h
new file mode 100644
index 0000000..9c6f8cc
--- /dev/null
+++ b/include/asm-microblaze/of_platform.h
@@ -0,0 +1,45 @@
+/*
+ * include/asm-microblaze/of_platform.h
+ *
+ * Copyright (C) 2006 Benjamin Herrenschmidt, IBM Corp.
+ * <benh@kernel.crashing.org>
+ *
+ * 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.
+ *
+ */
+
+#ifndef _ASM_MICROBLAZE_OF_PLATFORM_H
+#define _ASM_MICROBLAZE_OF_PLATFORM_H
+
+/* This is just here during the transition */
+#include <linux/of_platform.h>
+
+/* Platform drivers register/unregister */
+static inline int of_register_platform_driver(struct of_platform_driver *drv)
+{
+ return of_register_driver(drv, &of_platform_bus_type);
+}
+static inline void of_unregister_platform_driver(struct of_platform_driver *drv)
+{
+ of_unregister_driver(drv);
+}
+
+/* Platform devices and busses creation */
+extern struct of_device *of_platform_device_create(struct device_node *np,
+ const char *bus_id,
+ struct device *parent);
+/* pseudo "matches" value to not do deep probe */
+#define OF_NO_DEEP_PROBE ((struct of_device_id *)-1)
+
+extern int of_platform_bus_probe(struct device_node *root,
+ const struct of_device_id *matches,
+ struct device *parent);
+
+extern struct of_device *of_find_device_by_phandle(phandle ph);
+
+extern void of_instantiate_rtc(void);
+
+#endif /* _ASM_MICROBLAZE_OF_PLATFORM_H */
diff --git a/include/asm-microblaze/prom.h b/include/asm-microblaze/prom.h
new file mode 100644
index 0000000..2f439b4
--- /dev/null
+++ b/include/asm-microblaze/prom.h
@@ -0,0 +1,311 @@
+/*
+ * include/asm-microblaze/prom.h
+ *
+ * Definitions for talking to the Open Firmware PROM on
+ * Power Macintosh computers.
+ *
+ * Copyright (C) 1996-2005 Paul Mackerras.
+ *
+ * Updates for PPC64 by Peter Bergner & David Engebretsen, IBM Corp.
+ *
+ * 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.
+ */
+
+#ifndef _ASM_MICROBLAZE_PROM_H
+#define _ASM_MICROBLAZE_PROM_H
+#ifdef __KERNEL__
+
+#include <linux/types.h>
+#include <linux/proc_fs.h>
+#include <linux/platform_device.h>
+#include <asm/irq.h>
+#include <asm/atomic.h>
+
+#define OF_ROOT_NODE_ADDR_CELLS_DEFAULT 1
+#define OF_ROOT_NODE_SIZE_CELLS_DEFAULT 1
+
+#define of_compat_cmp(s1, s2, l) strncasecmp((s1), (s2), (l))
+#define of_prop_cmp(s1, s2) strcmp((s1), (s2))
+#define of_node_cmp(s1, s2) strcasecmp((s1), (s2))
+
+/* Definitions used by the flattened device tree */
+#define OF_DT_HEADER 0xd00dfeed /* marker */
+#define OF_DT_BEGIN_NODE 0x1 /* Start of node, full name */
+#define OF_DT_END_NODE 0x2 /* End node */
+#define OF_DT_PROP 0x3 /* Property: name off, size, content */
+#define OF_DT_NOP 0x4 /* nop */
+#define OF_DT_END 0x9
+
+#define OF_DT_VERSION 0x10
+
+/*
+ * This is what gets passed to the kernel by prom_init or kexec
+ *
+ * The dt struct contains the device tree structure, full pathes and
+ * property contents. The dt strings contain a separate block with just
+ * the strings for the property names, and is fully page aligned and
+ * self contained in a page, so that it can be kept around by the kernel,
+ * each property name appears only once in this page (cheap compression)
+ *
+ * the mem_rsvmap contains a map of reserved ranges of physical memory,
+ * passing it here instead of in the device-tree itself greatly simplifies
+ * the job of everybody. It's just a list of u64 pairs (base/size) that
+ * ends when size is 0
+ */
+struct boot_param_header {
+ u32 magic; /* magic word OF_DT_HEADER */
+ u32 totalsize; /* total size of DT block */
+ u32 off_dt_struct; /* offset to structure */
+ u32 off_dt_strings; /* offset to strings */
+ u32 off_mem_rsvmap; /* offset to memory reserve map */
+ u32 version; /* format version */
+ u32 last_comp_version; /* last compatible version */
+ /* version 2 fields below */
+ u32 boot_cpuid_phys; /* Physical CPU id we're booting on */
+ /* version 3 fields below */
+ u32 dt_strings_size; /* size of the DT strings block */
+ /* version 17 fields below */
+ u32 dt_struct_size; /* size of the DT structure block */
+};
+
+typedef u32 phandle;
+typedef u32 ihandle;
+
+struct property {
+ char *name;
+ int length;
+ void *value;
+ struct property *next;
+};
+
+struct device_node {
+ const char *name;
+ const char *type;
+ phandle node;
+ phandle linux_phandle;
+ char *full_name;
+
+ struct property *properties;
+ struct property *deadprops; /* removed properties */
+ struct device_node *parent;
+ struct device_node *child;
+ struct device_node *sibling;
+ struct device_node *next; /* next device of same type */
+ struct device_node *allnext; /* next in list of all nodes */
+ struct proc_dir_entry *pde; /* this node's proc directory */
+ struct kref kref;
+ unsigned long _flags;
+ void *data;
+};
+
+extern struct device_node *of_chosen;
+
+static inline int of_node_check_flag(struct device_node *n, unsigned long flag)
+{
+ return test_bit(flag, &n->_flags);
+}
+
+static inline void of_node_set_flag(struct device_node *n, unsigned long flag)
+{
+ set_bit(flag, &n->_flags);
+}
+
+#define HAVE_ARCH_DEVTREE_FIXUPS
+
+static inline void set_node_proc_entry(struct device_node *dn,
+ struct proc_dir_entry *de)
+{
+ dn->pde = de;
+}
+
+extern struct device_node *of_find_all_nodes(struct device_node *prev);
+extern struct device_node *of_node_get(struct device_node *node);
+extern void of_node_put(struct device_node *node);
+
+/* For scanning the flat device-tree at boot time */
+extern int __init of_scan_flat_dt(int (*it)(unsigned long node,
+ const char *uname, int depth,
+ void *data),
+ void *data);
+extern void *__init of_get_flat_dt_prop(unsigned long node, const char *name,
+ unsigned long *size);
+extern int __init
+ of_flat_dt_is_compatible(unsigned long node, const char *name);
+extern unsigned long __init of_get_flat_dt_root(void);
+
+/* For updating the device tree at runtime */
+extern void of_attach_node(struct device_node *);
+extern void of_detach_node(struct device_node *);
+
+/* Other Prototypes */
+extern void finish_device_tree(void);
+extern void unflatten_device_tree(void);
+extern void early_init_devtree(void *);
+extern int machine_is_compatible(const char *compat);
+extern void print_properties(struct device_node *node);
+extern int prom_n_intr_cells(struct device_node *np);
+extern void prom_get_irq_senses(unsigned char *senses, int off, int max);
+extern int prom_add_property(struct device_node *np, struct property *prop);
+extern int prom_remove_property(struct device_node *np, struct property *prop);
+extern int prom_update_property(struct device_node *np,
+ struct property *newprop,
+ struct property *oldprop);
+
+extern struct resource *request_OF_resource(struct device_node *node,
+ int index, const char *name_postfix);
+extern int release_OF_resource(struct device_node *node, int index);
+
+/*
+ * OF address retreival & translation
+ */
+
+/* Helper to read a big number; size is in cells (not bytes) */
+static inline u64 of_read_number(const u32 *cell, int size)
+{
+ u64 r = 0;
+ while (size--)
+ r = (r << 32) | *(cell++);
+ return r;
+}
+
+/* Like of_read_number, but we want an unsigned long result */
+#define of_read_ulong(cell, size) of_read_number(cell, size)
+
+/* Translate an OF address block into a CPU physical address
+ */
+extern u64 of_translate_address(struct device_node *np, const u32 *addr);
+
+/* Extract an address from a device, returns the region size and
+ * the address space flags too. The PCI version uses a BAR number
+ * instead of an absolute index
+ */
+extern const u32 *of_get_address(struct device_node *dev, int index,
+ u64 *size, unsigned int *flags);
+extern const u32 *of_get_pci_address(struct device_node *dev, int bar_no,
+ u64 *size, unsigned int *flags);
+
+/* Get an address as a resource. Note that if your address is
+ * a PIO address, the conversion will fail if the physical address
+ * can't be internally converted to an IO token with
+ * pci_address_to_pio(), that is because it's either called to early
+ * or it can't be matched to any host bridge IO space
+ */
+extern int of_address_to_resource(struct device_node *dev, int index,
+ struct resource *r);
+extern int of_pci_address_to_resource(struct device_node *dev, int bar,
+ struct resource *r);
+
+/* Parse the ibm,dma-window property of an OF node into the busno, phys and
+ * size parameters.
+ */
+void of_parse_dma_window(struct device_node *dn, const void *dma_window_prop,
+ unsigned long *busno, unsigned long *phys, unsigned long *size);
+
+extern void kdump_move_device_tree(void);
+
+/* CPU OF node matching */
+struct device_node *of_get_cpu_node(int cpu, unsigned int *thread);
+
+/* Get the MAC address */
+extern const void *of_get_mac_address(struct device_node *np);
+
+/*
+ * OF interrupt mapping
+ */
+
+/* This structure is returned when an interrupt is mapped. The controller
+ * field needs to be put() after use
+ */
+
+#define OF_MAX_IRQ_SPEC 4 /* We handle specifiers of at most 4 cells */
+
+struct of_irq {
+ struct device_node *controller; /* Interrupt controller node */
+ u32 size; /* Specifier size */
+ u32 specifier[OF_MAX_IRQ_SPEC]; /* Specifier copy */
+};
+
+/**
+ * of_irq_map_init - Initialize the irq remapper
+ * @flags: flags defining workarounds to enable
+ *
+ * Some machines have bugs in the device-tree which require certain workarounds
+ * to be applied. Call this before any interrupt mapping attempts to enable
+ * those workarounds.
+ */
+#define OF_IMAP_OLDWORLD_MAC 0x00000001
+#define OF_IMAP_NO_PHANDLE 0x00000002
+
+extern void of_irq_map_init(unsigned int flags);
+
+/**
+ * of_irq_map_raw - Low level interrupt tree parsing
+ * @parent: the device interrupt parent
+ * @intspec: interrupt specifier ("interrupts" property of the device)
+ * @ointsize: size of the passed in interrupt specifier
+ * @addr: address specifier (start of "reg" property of the device)
+ * @out_irq: structure of_irq filled by this function
+ *
+ * Returns 0 on success and a negative number on error
+ *
+ * This function is a low-level interrupt tree walking function. It
+ * can be used to do a partial walk with synthetized reg and interrupts
+ * properties, for example when resolving PCI interrupts when no device
+ * node exist for the parent.
+ *
+ */
+
+extern int of_irq_map_raw(struct device_node *parent, const u32 *intspec,
+ u32 ointsize, const u32 *addr,
+ struct of_irq *out_irq);
+
+/**
+ * of_irq_map_one - Resolve an interrupt for a device
+ * @device: the device whose interrupt is to be resolved
+ * @index: index of the interrupt to resolve
+ * @out_irq: structure of_irq filled by this function
+ *
+ * This function resolves an interrupt, walking the tree, for a given
+ * device-tree node. It's the high level pendant to of_irq_map_raw().
+ * It also implements the workarounds for OldWolrd Macs.
+ */
+extern int of_irq_map_one(struct device_node *device, int index,
+ struct of_irq *out_irq);
+
+/**
+ * of_irq_map_pci - Resolve the interrupt for a PCI device
+ * @pdev: the device whose interrupt is to be resolved
+ * @out_irq: structure of_irq filled by this function
+ *
+ * This function resolves the PCI interrupt for a given PCI device. If a
+ * device-node exists for a given pci_dev, it will use normal OF tree
+ * walking. If not, it will implement standard swizzling and walk up the
+ * PCI tree until an device-node is found, at which point it will finish
+ * resolving using the OF tree walking.
+ */
+struct pci_dev;
+extern int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq);
+
+extern int of_irq_to_resource(struct device_node *dev, int index,
+ struct resource *r);
+
+/**
+ * of_iomap - Maps the memory mapped IO for a given device_node
+ * @device: the device whose io range will be mapped
+ * @index: index of the io range
+ *
+ * Returns a pointer to the mapped memory
+ */
+extern void __iomem *of_iomap(struct device_node *device, int index);
+
+/*
+ * NB: This is here while we transition from using asm/prom.h
+ * to linux/of.h
+ */
+#include <linux/of.h>
+
+#endif /* __KERNEL__ */
+#endif /* _ASM_MICROBLAZE_PROM_H */
--
1.5.4.GIT