[PATCH] flattened device tree changes
This patch updates the format of the flattened device-tree passed between the boot trampoline and the kernel to support a more compact representation, for use by embedded systems mostly. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Benjamin Herrenschmidt
Paul Mackerras
parent
e28f7faf05
commit
34153fa3af
3 changed files with 209 additions and 68 deletions
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@ -625,8 +625,8 @@ void __init finish_device_tree(void)
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static inline char *find_flat_dt_string(u32 offset)
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{
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return ((char *)initial_boot_params) + initial_boot_params->off_dt_strings
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+ offset;
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return ((char *)initial_boot_params) +
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initial_boot_params->off_dt_strings + offset;
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}
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/**
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@ -635,26 +635,33 @@ static inline char *find_flat_dt_string(u32 offset)
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* unflatten the tree
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*/
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static int __init scan_flat_dt(int (*it)(unsigned long node,
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const char *full_path, void *data),
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const char *uname, int depth,
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void *data),
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void *data)
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{
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unsigned long p = ((unsigned long)initial_boot_params) +
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initial_boot_params->off_dt_struct;
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int rc = 0;
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int depth = -1;
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do {
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u32 tag = *((u32 *)p);
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char *pathp;
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p += 4;
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if (tag == OF_DT_END_NODE)
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if (tag == OF_DT_END_NODE) {
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depth --;
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continue;
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}
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if (tag == OF_DT_NOP)
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continue;
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if (tag == OF_DT_END)
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break;
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if (tag == OF_DT_PROP) {
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u32 sz = *((u32 *)p);
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p += 8;
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p = _ALIGN(p, sz >= 8 ? 8 : 4);
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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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p += sz;
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p = _ALIGN(p, 4);
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continue;
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@ -664,9 +671,18 @@ static int __init scan_flat_dt(int (*it)(unsigned long node,
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" device tree !\n", tag);
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return -EINVAL;
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}
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depth++;
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pathp = (char *)p;
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p = _ALIGN(p + strlen(pathp) + 1, 4);
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rc = it(p, pathp, data);
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if ((*pathp) == '/') {
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char *lp, *np;
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for (lp = NULL, np = pathp; *np; np++)
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if ((*np) == '/')
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lp = np+1;
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if (lp != NULL)
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pathp = lp;
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}
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rc = it(p, pathp, depth, data);
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if (rc != 0)
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break;
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} while(1);
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@ -689,17 +705,21 @@ static void* __init get_flat_dt_prop(unsigned long node, const char *name,
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const char *nstr;
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p += 4;
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if (tag == OF_DT_NOP)
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continue;
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if (tag != OF_DT_PROP)
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return NULL;
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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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p = _ALIGN(p, sz >= 8 ? 8 : 4);
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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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nstr = find_flat_dt_string(noff);
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if (nstr == NULL) {
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printk(KERN_WARNING "Can't find property index name !\n");
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printk(KERN_WARNING "Can't find property index"
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" name !\n");
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return NULL;
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}
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if (strcmp(name, nstr) == 0) {
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@ -713,7 +733,7 @@ static void* __init get_flat_dt_prop(unsigned long node, const char *name,
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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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unsigned long align)
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{
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void *res;
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@ -727,13 +747,16 @@ static void *__init unflatten_dt_alloc(unsigned long *mem, unsigned long size,
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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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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;
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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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@ -742,21 +765,62 @@ static unsigned long __init unflatten_dt_node(unsigned long mem,
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}
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*p += 4;
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pathp = (char *)*p;
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l = strlen(pathp) + 1;
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l = allocl = strlen(pathp) + 1;
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*p = _ALIGN(*p + l, 4);
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np = unflatten_dt_alloc(&mem, sizeof(struct device_node) + l,
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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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memcpy(np->full_name, pathp, l);
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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, 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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/* 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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@ -770,18 +834,26 @@ static unsigned long __init unflatten_dt_node(unsigned long mem,
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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 = _ALIGN((*p) + 8, sz >= 8 ? 8 : 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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@ -801,6 +873,36 @@ static unsigned long __init unflatten_dt_node(unsigned long mem,
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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 = (unsigned char *)(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, 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 = get_property(np, "name", NULL);
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@ -812,7 +914,7 @@ static unsigned long __init unflatten_dt_node(unsigned long mem,
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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);
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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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@ -842,21 +944,27 @@ void __init unflatten_device_tree(void)
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/* First pass, scan for size */
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start = ((unsigned long)initial_boot_params) +
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initial_boot_params->off_dt_struct;
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size = unflatten_dt_node(0, &start, NULL, NULL);
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size = unflatten_dt_node(0, &start, NULL, NULL, 0);
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size = (size | 3) + 1;
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DBG(" size is %lx, allocating...\n", size);
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/* Allocate memory for the expanded device tree */
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mem = (unsigned long)abs_to_virt(lmb_alloc(size,
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mem = (unsigned long)abs_to_virt(lmb_alloc(size + 4,
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__alignof__(struct device_node)));
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((u32 *)mem)[size / 4] = 0xdeadbeef;
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DBG(" unflattening...\n", mem);
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/* Second pass, do actual unflattening */
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start = ((unsigned long)initial_boot_params) +
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initial_boot_params->off_dt_struct;
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unflatten_dt_node(mem, &start, NULL, &allnextp);
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unflatten_dt_node(mem, &start, NULL, &allnextp, 0);
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if (*((u32 *)start) != OF_DT_END)
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printk(KERN_WARNING "Weird tag at end of tree: %x\n", *((u32 *)start));
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printk(KERN_WARNING "Weird tag at end of tree: %08x\n", *((u32 *)start));
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if (((u32 *)mem)[size / 4] != 0xdeadbeef)
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printk(KERN_WARNING "End of tree marker overwritten: %08x\n",
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((u32 *)mem)[size / 4] );
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*allnextp = NULL;
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/* Get pointer to OF "/chosen" node for use everywhere */
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@ -880,7 +988,7 @@ void __init unflatten_device_tree(void)
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static int __init early_init_dt_scan_cpus(unsigned long node,
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const char *full_path, void *data)
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const char *uname, int depth, void *data)
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{
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char *type = get_flat_dt_prop(node, "device_type", NULL);
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u32 *prop;
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@ -947,13 +1055,15 @@ static int __init early_init_dt_scan_cpus(unsigned long node,
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}
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static int __init early_init_dt_scan_chosen(unsigned long node,
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const char *full_path, void *data)
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const char *uname, int depth, void *data)
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{
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u32 *prop;
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u64 *prop64;
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extern unsigned long memory_limit, tce_alloc_start, tce_alloc_end;
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if (strcmp(full_path, "/chosen") != 0)
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DBG("search \"chosen\", depth: %d, uname: %s\n", depth, uname);
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if (depth != 1 || strcmp(uname, "chosen") != 0)
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return 0;
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/* get platform type */
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@ -1003,18 +1113,20 @@ static int __init early_init_dt_scan_chosen(unsigned long node,
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}
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static int __init early_init_dt_scan_root(unsigned long node,
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const char *full_path, void *data)
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const char *uname, int depth, void *data)
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{
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u32 *prop;
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if (strcmp(full_path, "/") != 0)
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if (depth != 0)
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return 0;
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prop = (u32 *)get_flat_dt_prop(node, "#size-cells", NULL);
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dt_root_size_cells = (prop == NULL) ? 1 : *prop;
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DBG("dt_root_size_cells = %x\n", dt_root_size_cells);
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prop = (u32 *)get_flat_dt_prop(node, "#address-cells", NULL);
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dt_root_addr_cells = (prop == NULL) ? 2 : *prop;
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DBG("dt_root_addr_cells = %x\n", dt_root_addr_cells);
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/* break now */
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return 1;
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@ -1042,7 +1154,7 @@ static unsigned long __init dt_mem_next_cell(int s, cell_t **cellp)
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static int __init early_init_dt_scan_memory(unsigned long node,
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const char *full_path, void *data)
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const char *uname, int depth, void *data)
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{
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char *type = get_flat_dt_prop(node, "device_type", NULL);
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cell_t *reg, *endp;
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@ -1058,7 +1170,9 @@ static int __init early_init_dt_scan_memory(unsigned long node,
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endp = reg + (l / sizeof(cell_t));
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DBG("memory scan node %s ...\n", full_path);
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DBG("memory scan node %s ..., reg size %ld, data: %x %x %x %x, ...\n",
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uname, l, reg[0], reg[1], reg[2], reg[3]);
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while ((endp - reg) >= (dt_root_addr_cells + dt_root_size_cells)) {
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unsigned long base, size;
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@ -1469,10 +1583,11 @@ struct device_node *of_find_node_by_path(const char *path)
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struct device_node *np = allnodes;
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read_lock(&devtree_lock);
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for (; np != 0; np = np->allnext)
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for (; np != 0; np = np->allnext) {
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if (np->full_name != 0 && strcasecmp(np->full_name, path) == 0
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&& of_node_get(np))
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break;
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}
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read_unlock(&devtree_lock);
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return np;
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}
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@ -1534,7 +1534,8 @@ static unsigned long __init dt_find_string(char *str)
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*/
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#define MAX_PROPERTY_NAME 64
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static void __init scan_dt_build_strings(phandle node, unsigned long *mem_start,
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static void __init scan_dt_build_strings(phandle node,
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unsigned long *mem_start,
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unsigned long *mem_end)
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{
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unsigned long offset = reloc_offset();
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@ -1547,16 +1548,21 @@ static void __init scan_dt_build_strings(phandle node, unsigned long *mem_start,
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/* get and store all property names */
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prev_name = RELOC("");
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for (;;) {
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int rc;
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/* 64 is max len of name including nul. */
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namep = make_room(mem_start, mem_end, MAX_PROPERTY_NAME, 1);
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rc = call_prom("nextprop", 3, 1, node, prev_name, namep);
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if (rc != 1) {
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if (call_prom("nextprop", 3, 1, node, prev_name, namep) != 1) {
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/* No more nodes: unwind alloc */
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*mem_start = (unsigned long)namep;
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break;
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}
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/* skip "name" */
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if (strcmp(namep, RELOC("name")) == 0) {
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*mem_start = (unsigned long)namep;
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prev_name = RELOC("name");
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continue;
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}
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/* get/create string entry */
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soff = dt_find_string(namep);
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if (soff != 0) {
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*mem_start = (unsigned long)namep;
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@ -1571,7 +1577,7 @@ static void __init scan_dt_build_strings(phandle node, unsigned long *mem_start,
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/* do all our children */
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child = call_prom("child", 1, 1, node);
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while (child != (phandle)0) {
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while (child != 0) {
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scan_dt_build_strings(child, mem_start, mem_end);
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child = call_prom("peer", 1, 1, child);
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}
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@ -1580,16 +1586,13 @@ static void __init scan_dt_build_strings(phandle node, unsigned long *mem_start,
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static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
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unsigned long *mem_end)
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{
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int l, align;
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phandle child;
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char *namep, *prev_name, *sstart, *p, *ep;
|
||||
char *namep, *prev_name, *sstart, *p, *ep, *lp, *path;
|
||||
unsigned long soff;
|
||||
unsigned char *valp;
|
||||
unsigned long offset = reloc_offset();
|
||||
char pname[MAX_PROPERTY_NAME];
|
||||
char *path;
|
||||
|
||||
path = RELOC(prom_scratch);
|
||||
static char pname[MAX_PROPERTY_NAME];
|
||||
int l;
|
||||
|
||||
dt_push_token(OF_DT_BEGIN_NODE, mem_start, mem_end);
|
||||
|
||||
|
|
@ -1599,23 +1602,33 @@ static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
|
|||
namep, *mem_end - *mem_start);
|
||||
if (l >= 0) {
|
||||
/* Didn't fit? Get more room. */
|
||||
if (l+1 > *mem_end - *mem_start) {
|
||||
if ((l+1) > (*mem_end - *mem_start)) {
|
||||
namep = make_room(mem_start, mem_end, l+1, 1);
|
||||
call_prom("package-to-path", 3, 1, node, namep, l);
|
||||
}
|
||||
namep[l] = '\0';
|
||||
|
||||
/* Fixup an Apple bug where they have bogus \0 chars in the
|
||||
* middle of the path in some properties
|
||||
*/
|
||||
for (p = namep, ep = namep + l; p < ep; p++)
|
||||
if (*p == '\0') {
|
||||
memmove(p, p+1, ep - p);
|
||||
ep--; l--;
|
||||
ep--; l--; p--;
|
||||
}
|
||||
*mem_start = _ALIGN(((unsigned long) namep) + strlen(namep) + 1, 4);
|
||||
|
||||
/* now try to extract the unit name in that mess */
|
||||
for (p = namep, lp = NULL; *p; p++)
|
||||
if (*p == '/')
|
||||
lp = p + 1;
|
||||
if (lp != NULL)
|
||||
memmove(namep, lp, strlen(lp) + 1);
|
||||
*mem_start = _ALIGN(((unsigned long) namep) +
|
||||
strlen(namep) + 1, 4);
|
||||
}
|
||||
|
||||
/* get it again for debugging */
|
||||
path = RELOC(prom_scratch);
|
||||
memset(path, 0, PROM_SCRATCH_SIZE);
|
||||
call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1);
|
||||
|
||||
|
|
@ -1623,23 +1636,27 @@ static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
|
|||
prev_name = RELOC("");
|
||||
sstart = (char *)RELOC(dt_string_start);
|
||||
for (;;) {
|
||||
int rc;
|
||||
|
||||
rc = call_prom("nextprop", 3, 1, node, prev_name, pname);
|
||||
if (rc != 1)
|
||||
if (call_prom("nextprop", 3, 1, node, prev_name,
|
||||
RELOC(pname)) != 1)
|
||||
break;
|
||||
|
||||
/* skip "name" */
|
||||
if (strcmp(RELOC(pname), RELOC("name")) == 0) {
|
||||
prev_name = RELOC("name");
|
||||
continue;
|
||||
}
|
||||
|
||||
/* find string offset */
|
||||
soff = dt_find_string(pname);
|
||||
soff = dt_find_string(RELOC(pname));
|
||||
if (soff == 0) {
|
||||
prom_printf("WARNING: Can't find string index for <%s>, node %s\n",
|
||||
pname, path);
|
||||
prom_printf("WARNING: Can't find string index for"
|
||||
" <%s>, node %s\n", RELOC(pname), path);
|
||||
break;
|
||||
}
|
||||
prev_name = sstart + soff;
|
||||
|
||||
/* get length */
|
||||
l = call_prom("getproplen", 2, 1, node, pname);
|
||||
l = call_prom("getproplen", 2, 1, node, RELOC(pname));
|
||||
|
||||
/* sanity checks */
|
||||
if (l == PROM_ERROR)
|
||||
|
|
@ -1648,7 +1665,7 @@ static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
|
|||
prom_printf("WARNING: ignoring large property ");
|
||||
/* It seems OF doesn't null-terminate the path :-( */
|
||||
prom_printf("[%s] ", path);
|
||||
prom_printf("%s length 0x%x\n", pname, l);
|
||||
prom_printf("%s length 0x%x\n", RELOC(pname), l);
|
||||
continue;
|
||||
}
|
||||
|
||||
|
|
@ -1658,17 +1675,16 @@ static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
|
|||
dt_push_token(soff, mem_start, mem_end);
|
||||
|
||||
/* push property content */
|
||||
align = (l >= 8) ? 8 : 4;
|
||||
valp = make_room(mem_start, mem_end, l, align);
|
||||
call_prom("getprop", 4, 1, node, pname, valp, l);
|
||||
valp = make_room(mem_start, mem_end, l, 4);
|
||||
call_prom("getprop", 4, 1, node, RELOC(pname), valp, l);
|
||||
*mem_start = _ALIGN(*mem_start, 4);
|
||||
}
|
||||
|
||||
/* Add a "linux,phandle" property. */
|
||||
soff = dt_find_string(RELOC("linux,phandle"));
|
||||
if (soff == 0)
|
||||
prom_printf("WARNING: Can't find string index for <linux-phandle>"
|
||||
" node %s\n", path);
|
||||
prom_printf("WARNING: Can't find string index for"
|
||||
" <linux-phandle> node %s\n", path);
|
||||
else {
|
||||
dt_push_token(OF_DT_PROP, mem_start, mem_end);
|
||||
dt_push_token(4, mem_start, mem_end);
|
||||
|
|
@ -1679,7 +1695,7 @@ static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
|
|||
|
||||
/* do all our children */
|
||||
child = call_prom("child", 1, 1, node);
|
||||
while (child != (phandle)0) {
|
||||
while (child != 0) {
|
||||
scan_dt_build_struct(child, mem_start, mem_end);
|
||||
child = call_prom("peer", 1, 1, child);
|
||||
}
|
||||
|
|
@ -1718,7 +1734,8 @@ static void __init flatten_device_tree(void)
|
|||
|
||||
/* Build header and make room for mem rsv map */
|
||||
mem_start = _ALIGN(mem_start, 4);
|
||||
hdr = make_room(&mem_start, &mem_end, sizeof(struct boot_param_header), 4);
|
||||
hdr = make_room(&mem_start, &mem_end,
|
||||
sizeof(struct boot_param_header), 4);
|
||||
RELOC(dt_header_start) = (unsigned long)hdr;
|
||||
rsvmap = make_room(&mem_start, &mem_end, sizeof(mem_reserve_map), 8);
|
||||
|
||||
|
|
@ -1731,11 +1748,11 @@ static void __init flatten_device_tree(void)
|
|||
namep = make_room(&mem_start, &mem_end, 16, 1);
|
||||
strcpy(namep, RELOC("linux,phandle"));
|
||||
mem_start = (unsigned long)namep + strlen(namep) + 1;
|
||||
RELOC(dt_string_end) = mem_start;
|
||||
|
||||
/* Build string array */
|
||||
prom_printf("Building dt strings...\n");
|
||||
scan_dt_build_strings(root, &mem_start, &mem_end);
|
||||
RELOC(dt_string_end) = mem_start;
|
||||
|
||||
/* Build structure */
|
||||
mem_start = PAGE_ALIGN(mem_start);
|
||||
|
|
@ -1750,9 +1767,11 @@ static void __init flatten_device_tree(void)
|
|||
hdr->totalsize = RELOC(dt_struct_end) - RELOC(dt_header_start);
|
||||
hdr->off_dt_struct = RELOC(dt_struct_start) - RELOC(dt_header_start);
|
||||
hdr->off_dt_strings = RELOC(dt_string_start) - RELOC(dt_header_start);
|
||||
hdr->dt_strings_size = RELOC(dt_string_end) - RELOC(dt_string_start);
|
||||
hdr->off_mem_rsvmap = ((unsigned long)rsvmap) - RELOC(dt_header_start);
|
||||
hdr->version = OF_DT_VERSION;
|
||||
hdr->last_comp_version = 1;
|
||||
/* Version 16 is not backward compatible */
|
||||
hdr->last_comp_version = 0x10;
|
||||
|
||||
/* Reserve the whole thing and copy the reserve map in, we
|
||||
* also bump mem_reserve_cnt to cause further reservations to
|
||||
|
|
@ -1808,6 +1827,9 @@ static void __init fixup_device_tree(void)
|
|||
/* does it need fixup ? */
|
||||
if (prom_getproplen(i2c, "interrupts") > 0)
|
||||
return;
|
||||
|
||||
prom_printf("fixing up bogus interrupts for u3 i2c...\n");
|
||||
|
||||
/* interrupt on this revision of u3 is number 0 and level */
|
||||
interrupts[0] = 0;
|
||||
interrupts[1] = 1;
|
||||
|
|
|
|||
|
|
@ -22,13 +22,15 @@
|
|||
#define RELOC(x) (*PTRRELOC(&(x)))
|
||||
|
||||
/* Definitions used by the flattened device tree */
|
||||
#define OF_DT_HEADER 0xd00dfeed /* 4: version, 4: total size */
|
||||
#define OF_DT_BEGIN_NODE 0x1 /* Start node: full name */
|
||||
#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_PROP 0x3 /* Property: name off, size,
|
||||
* content */
|
||||
#define OF_DT_NOP 0x4 /* nop */
|
||||
#define OF_DT_END 0x9
|
||||
|
||||
#define OF_DT_VERSION 1
|
||||
#define OF_DT_VERSION 0x10
|
||||
|
||||
/*
|
||||
* This is what gets passed to the kernel by prom_init or kexec
|
||||
|
|
@ -54,7 +56,9 @@ struct boot_param_header
|
|||
u32 version; /* format version */
|
||||
u32 last_comp_version; /* last compatible version */
|
||||
/* version 2 fields below */
|
||||
u32 boot_cpuid_phys; /* Which physical CPU id we're booting on */
|
||||
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 */
|
||||
};
|
||||
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue