mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-01-12 00:00:00 +00:00
of/flattree: Merge unflatten_dt_node
Merge common code between PowerPC and MicroBlaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Tested-by: Michal Simek <monstr@monstr.eu>
This commit is contained in:
Grant Likely
parent
00e38efd90
commit
bbd33931a0
@ -50,201 +50,6 @@ typedef u32 cell_t;
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/* export that to outside world */
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struct device_node *of_chosen;
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static void *__init unflatten_dt_alloc(unsigned long *mem, unsigned long size,
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unsigned long align)
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{
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void *res;
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*mem = _ALIGN(*mem, align);
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res = (void *)*mem;
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*mem += size;
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return res;
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}
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static unsigned long __init unflatten_dt_node(unsigned long mem,
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unsigned long *p,
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struct device_node *dad,
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struct device_node ***allnextpp,
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unsigned long fpsize)
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{
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struct device_node *np;
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struct property *pp, **prev_pp = NULL;
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char *pathp;
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u32 tag;
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unsigned int l, allocl;
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int has_name = 0;
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int new_format = 0;
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tag = *((u32 *)(*p));
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if (tag != OF_DT_BEGIN_NODE) {
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printk("Weird tag at start of node: %x\n", tag);
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return mem;
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}
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*p += 4;
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pathp = (char *)*p;
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l = allocl = strlen(pathp) + 1;
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*p = _ALIGN(*p + l, 4);
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/* version 0x10 has a more compact unit name here instead of the full
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* path. we accumulate the full path size using "fpsize", we'll rebuild
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* it later. We detect this because the first character of the name is
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* not '/'.
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*/
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if ((*pathp) != '/') {
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new_format = 1;
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if (fpsize == 0) {
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/* root node: special case. fpsize accounts for path
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* plus terminating zero. root node only has '/', so
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* fpsize should be 2, but we want to avoid the first
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* level nodes to have two '/' so we use fpsize 1 here
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*/
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fpsize = 1;
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allocl = 2;
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} else {
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/* account for '/' and path size minus terminal 0
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* already in 'l'
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*/
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fpsize += l;
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allocl = fpsize;
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}
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}
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np = unflatten_dt_alloc(&mem, sizeof(struct device_node) + allocl,
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__alignof__(struct device_node));
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if (allnextpp) {
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memset(np, 0, sizeof(*np));
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np->full_name = ((char *)np) + sizeof(struct device_node);
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if (new_format) {
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char *p2 = np->full_name;
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/* rebuild full path for new format */
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if (dad && dad->parent) {
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strcpy(p2, dad->full_name);
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#ifdef DEBUG
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if ((strlen(p2) + l + 1) != allocl) {
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pr_debug("%s: p: %d, l: %d, a: %d\n",
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pathp, (int)strlen(p2),
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l, allocl);
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}
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#endif
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p2 += strlen(p2);
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}
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*(p2++) = '/';
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memcpy(p2, pathp, l);
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} else
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memcpy(np->full_name, pathp, l);
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prev_pp = &np->properties;
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**allnextpp = np;
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*allnextpp = &np->allnext;
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if (dad != NULL) {
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np->parent = dad;
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/* we temporarily use the next field as `last_child'*/
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if (dad->next == NULL)
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dad->child = np;
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else
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dad->next->sibling = np;
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dad->next = np;
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}
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kref_init(&np->kref);
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}
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while (1) {
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u32 sz, noff;
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char *pname;
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tag = *((u32 *)(*p));
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if (tag == OF_DT_NOP) {
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*p += 4;
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continue;
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}
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if (tag != OF_DT_PROP)
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break;
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*p += 4;
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sz = *((u32 *)(*p));
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noff = *((u32 *)((*p) + 4));
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*p += 8;
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if (initial_boot_params->version < 0x10)
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*p = _ALIGN(*p, sz >= 8 ? 8 : 4);
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pname = find_flat_dt_string(noff);
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if (pname == NULL) {
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printk(KERN_INFO
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"Can't find property name in list !\n");
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break;
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}
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if (strcmp(pname, "name") == 0)
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has_name = 1;
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l = strlen(pname) + 1;
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pp = unflatten_dt_alloc(&mem, sizeof(struct property),
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__alignof__(struct property));
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if (allnextpp) {
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if (strcmp(pname, "linux,phandle") == 0) {
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np->node = *((u32 *)*p);
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if (np->linux_phandle == 0)
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np->linux_phandle = np->node;
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}
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if (strcmp(pname, "ibm,phandle") == 0)
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np->linux_phandle = *((u32 *)*p);
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pp->name = pname;
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pp->length = sz;
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pp->value = (void *)*p;
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*prev_pp = pp;
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prev_pp = &pp->next;
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}
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*p = _ALIGN((*p) + sz, 4);
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}
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/* with version 0x10 we may not have the name property, recreate
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* it here from the unit name if absent
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*/
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if (!has_name) {
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char *p1 = pathp, *ps = pathp, *pa = NULL;
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int sz;
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while (*p1) {
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if ((*p1) == '@')
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pa = p1;
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if ((*p1) == '/')
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ps = p1 + 1;
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p1++;
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}
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if (pa < ps)
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pa = p1;
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sz = (pa - ps) + 1;
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pp = unflatten_dt_alloc(&mem, sizeof(struct property) + sz,
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__alignof__(struct property));
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if (allnextpp) {
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pp->name = "name";
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pp->length = sz;
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pp->value = pp + 1;
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*prev_pp = pp;
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prev_pp = &pp->next;
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memcpy(pp->value, ps, sz - 1);
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((char *)pp->value)[sz - 1] = 0;
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pr_debug("fixed up name for %s -> %s\n", pathp,
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(char *)pp->value);
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}
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}
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if (allnextpp) {
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*prev_pp = NULL;
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np->name = of_get_property(np, "name", NULL);
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np->type = of_get_property(np, "device_type", NULL);
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if (!np->name)
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np->name = "<NULL>";
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if (!np->type)
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np->type = "<NULL>";
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}
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while (tag == OF_DT_BEGIN_NODE) {
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mem = unflatten_dt_node(mem, p, np, allnextpp, fpsize);
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tag = *((u32 *)(*p));
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}
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if (tag != OF_DT_END_NODE) {
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printk(KERN_INFO "Weird tag at end of node: %x\n", tag);
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return mem;
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}
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*p += 4;
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return mem;
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}
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/**
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* unflattens the device-tree passed by the firmware, creating the
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* tree of struct device_node. It also fills the "name" and "type"
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@ -80,200 +80,6 @@ extern rwlock_t devtree_lock; /* temporary while merging */
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/* export that to outside world */
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struct device_node *of_chosen;
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static void *__init unflatten_dt_alloc(unsigned long *mem, unsigned long size,
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unsigned long align)
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{
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void *res;
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*mem = _ALIGN(*mem, align);
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res = (void *)*mem;
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*mem += size;
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return res;
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}
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static unsigned long __init unflatten_dt_node(unsigned long mem,
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unsigned long *p,
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struct device_node *dad,
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struct device_node ***allnextpp,
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unsigned long fpsize)
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{
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struct device_node *np;
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struct property *pp, **prev_pp = NULL;
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char *pathp;
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u32 tag;
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unsigned int l, allocl;
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int has_name = 0;
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int new_format = 0;
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tag = *((u32 *)(*p));
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if (tag != OF_DT_BEGIN_NODE) {
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printk("Weird tag at start of node: %x\n", tag);
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return mem;
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}
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*p += 4;
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pathp = (char *)*p;
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l = allocl = strlen(pathp) + 1;
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*p = _ALIGN(*p + l, 4);
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/* version 0x10 has a more compact unit name here instead of the full
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* path. we accumulate the full path size using "fpsize", we'll rebuild
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* it later. We detect this because the first character of the name is
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* not '/'.
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*/
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if ((*pathp) != '/') {
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new_format = 1;
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if (fpsize == 0) {
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/* root node: special case. fpsize accounts for path
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* plus terminating zero. root node only has '/', so
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* fpsize should be 2, but we want to avoid the first
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* level nodes to have two '/' so we use fpsize 1 here
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*/
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fpsize = 1;
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allocl = 2;
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} else {
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/* account for '/' and path size minus terminal 0
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* already in 'l'
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*/
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fpsize += l;
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allocl = fpsize;
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}
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}
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np = unflatten_dt_alloc(&mem, sizeof(struct device_node) + allocl,
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__alignof__(struct device_node));
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if (allnextpp) {
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memset(np, 0, sizeof(*np));
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np->full_name = ((char*)np) + sizeof(struct device_node);
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if (new_format) {
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char *p = np->full_name;
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/* rebuild full path for new format */
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if (dad && dad->parent) {
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strcpy(p, dad->full_name);
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#ifdef DEBUG
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if ((strlen(p) + l + 1) != allocl) {
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DBG("%s: p: %d, l: %d, a: %d\n",
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pathp, (int)strlen(p), l, allocl);
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}
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#endif
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p += strlen(p);
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}
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*(p++) = '/';
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memcpy(p, pathp, l);
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} else
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memcpy(np->full_name, pathp, l);
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prev_pp = &np->properties;
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**allnextpp = np;
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*allnextpp = &np->allnext;
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if (dad != NULL) {
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np->parent = dad;
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/* we temporarily use the next field as `last_child'*/
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if (dad->next == 0)
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dad->child = np;
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else
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dad->next->sibling = np;
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dad->next = np;
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}
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kref_init(&np->kref);
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}
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while(1) {
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u32 sz, noff;
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char *pname;
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tag = *((u32 *)(*p));
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if (tag == OF_DT_NOP) {
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*p += 4;
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continue;
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}
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if (tag != OF_DT_PROP)
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break;
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*p += 4;
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sz = *((u32 *)(*p));
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noff = *((u32 *)((*p) + 4));
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*p += 8;
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if (initial_boot_params->version < 0x10)
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*p = _ALIGN(*p, sz >= 8 ? 8 : 4);
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pname = find_flat_dt_string(noff);
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if (pname == NULL) {
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printk("Can't find property name in list !\n");
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break;
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}
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if (strcmp(pname, "name") == 0)
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has_name = 1;
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l = strlen(pname) + 1;
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pp = unflatten_dt_alloc(&mem, sizeof(struct property),
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__alignof__(struct property));
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if (allnextpp) {
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if (strcmp(pname, "linux,phandle") == 0) {
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np->node = *((u32 *)*p);
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if (np->linux_phandle == 0)
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np->linux_phandle = np->node;
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}
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if (strcmp(pname, "ibm,phandle") == 0)
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np->linux_phandle = *((u32 *)*p);
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pp->name = pname;
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pp->length = sz;
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pp->value = (void *)*p;
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*prev_pp = pp;
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prev_pp = &pp->next;
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}
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*p = _ALIGN((*p) + sz, 4);
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}
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/* with version 0x10 we may not have the name property, recreate
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* it here from the unit name if absent
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*/
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if (!has_name) {
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char *p = pathp, *ps = pathp, *pa = NULL;
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int sz;
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while (*p) {
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if ((*p) == '@')
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pa = p;
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if ((*p) == '/')
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ps = p + 1;
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p++;
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}
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if (pa < ps)
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pa = p;
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sz = (pa - ps) + 1;
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pp = unflatten_dt_alloc(&mem, sizeof(struct property) + sz,
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__alignof__(struct property));
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if (allnextpp) {
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pp->name = "name";
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pp->length = sz;
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pp->value = pp + 1;
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*prev_pp = pp;
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prev_pp = &pp->next;
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memcpy(pp->value, ps, sz - 1);
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((char *)pp->value)[sz - 1] = 0;
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DBG("fixed up name for %s -> %s\n", pathp,
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(char *)pp->value);
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}
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}
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if (allnextpp) {
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*prev_pp = NULL;
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np->name = of_get_property(np, "name", NULL);
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np->type = of_get_property(np, "device_type", NULL);
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if (!np->name)
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np->name = "<NULL>";
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if (!np->type)
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np->type = "<NULL>";
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}
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while (tag == OF_DT_BEGIN_NODE) {
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mem = unflatten_dt_node(mem, p, np, allnextpp, fpsize);
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tag = *((u32 *)(*p));
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}
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if (tag != OF_DT_END_NODE) {
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printk("Weird tag at end of node: %x\n", tag);
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return mem;
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}
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*p += 4;
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return mem;
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}
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static int __init early_parse_mem(char *p)
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{
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if (!p)
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200
drivers/of/fdt.c
200
drivers/of/fdt.c
@ -166,3 +166,203 @@ int __init of_flat_dt_is_compatible(unsigned long node, const char *compat)
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return 0;
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}
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static void *__init unflatten_dt_alloc(unsigned long *mem, unsigned long size,
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unsigned long align)
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{
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void *res;
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*mem = _ALIGN(*mem, align);
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res = (void *)*mem;
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*mem += size;
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return res;
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}
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/**
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* unflatten_dt_node - Alloc and populate a device_node from the flat tree
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* @p: pointer to node in flat tree
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* @dad: Parent struct device_node
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* @allnextpp: pointer to ->allnext from last allocated device_node
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* @fpsize: Size of the node path up at the current depth.
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*/
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unsigned long __init unflatten_dt_node(unsigned long mem,
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unsigned long *p,
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struct device_node *dad,
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struct device_node ***allnextpp,
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unsigned long fpsize)
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{
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struct device_node *np;
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struct property *pp, **prev_pp = NULL;
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char *pathp;
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u32 tag;
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unsigned int l, allocl;
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int has_name = 0;
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int new_format = 0;
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tag = *((u32 *)(*p));
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if (tag != OF_DT_BEGIN_NODE) {
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pr_err("Weird tag at start of node: %x\n", tag);
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return mem;
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}
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*p += 4;
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pathp = (char *)*p;
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l = allocl = strlen(pathp) + 1;
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*p = _ALIGN(*p + l, 4);
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/* version 0x10 has a more compact unit name here instead of the full
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* path. we accumulate the full path size using "fpsize", we'll rebuild
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* it later. We detect this because the first character of the name is
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* not '/'.
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*/
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if ((*pathp) != '/') {
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new_format = 1;
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if (fpsize == 0) {
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/* root node: special case. fpsize accounts for path
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* plus terminating zero. root node only has '/', so
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* fpsize should be 2, but we want to avoid the first
|
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* level nodes to have two '/' so we use fpsize 1 here
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*/
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fpsize = 1;
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allocl = 2;
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} else {
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/* account for '/' and path size minus terminal 0
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* already in 'l'
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*/
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fpsize += l;
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allocl = fpsize;
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}
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}
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np = unflatten_dt_alloc(&mem, sizeof(struct device_node) + allocl,
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__alignof__(struct device_node));
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if (allnextpp) {
|
||||
memset(np, 0, sizeof(*np));
|
||||
np->full_name = ((char *)np) + sizeof(struct device_node);
|
||||
if (new_format) {
|
||||
char *fn = np->full_name;
|
||||
/* rebuild full path for new format */
|
||||
if (dad && dad->parent) {
|
||||
strcpy(fn, dad->full_name);
|
||||
#ifdef DEBUG
|
||||
if ((strlen(fn) + l + 1) != allocl) {
|
||||
pr_debug("%s: p: %d, l: %d, a: %d\n",
|
||||
pathp, (int)strlen(fn),
|
||||
l, allocl);
|
||||
}
|
||||
#endif
|
||||
fn += strlen(fn);
|
||||
}
|
||||
*(fn++) = '/';
|
||||
memcpy(fn, 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 == NULL)
|
||||
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) {
|
||||
pr_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 *p1 = pathp, *ps = pathp, *pa = NULL;
|
||||
int sz;
|
||||
|
||||
while (*p1) {
|
||||
if ((*p1) == '@')
|
||||
pa = p1;
|
||||
if ((*p1) == '/')
|
||||
ps = p1 + 1;
|
||||
p1++;
|
||||
}
|
||||
if (pa < ps)
|
||||
pa = p1;
|
||||
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) {
|
||||
pr_err("Weird tag at end of node: %x\n", tag);
|
||||
return mem;
|
||||
}
|
||||
*p += 4;
|
||||
return mem;
|
||||
}
|
||||
|
||||
@ -69,6 +69,10 @@ extern void *of_get_flat_dt_prop(unsigned long node, const char *name,
|
||||
unsigned long *size);
|
||||
extern int of_flat_dt_is_compatible(unsigned long node, const char *name);
|
||||
extern unsigned long of_get_flat_dt_root(void);
|
||||
extern unsigned long unflatten_dt_node(unsigned long mem, unsigned long *p,
|
||||
struct device_node *dad,
|
||||
struct device_node ***allnextpp,
|
||||
unsigned long fpsize);
|
||||
|
||||
/* Other Prototypes */
|
||||
extern void finish_device_tree(void);
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user