1 files changed, 695 insertions, 0 deletions

diff --git a/common/ft_build.c b/common/ft_build.c
new file mode 100644
index 0000000..65a274f
--- /dev/null
+++ b/common/ft_build.c
@@ -0,0 +1,695 @@
+/*
+ * OF flat tree builder
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <environment.h>
+
+#ifdef CONFIG_OF_FLAT_TREE
+
+#include <asm/errno.h>
+#include <stddef.h>
+
+#include <ft_build.h>
+
+/* align addr on a size boundary - adjust address up if needed -- Cort */
+#define _ALIGN(addr,size)       (((addr)+(size)-1)&(~((size)-1)))
+
+static void ft_put_word(struct ft_cxt *cxt, u32 v)
+{
+	if (cxt->overflow)	/* do nothing */
+		return;
+
+	/* check for overflow */
+	if (cxt->p + 4 > cxt->pstr) {
+		cxt->overflow = 1;
+		return;
+	}
+
+	*(u32 *) cxt->p = cpu_to_be32(v);
+	cxt->p += 4;
+}
+
+static inline void ft_put_bin(struct ft_cxt *cxt, const void *data, int sz)
+{
+	u8 *p;
+
+	if (cxt->overflow)	/* do nothing */
+		return;
+
+	/* next pointer pos */
+	p = (u8 *) _ALIGN((unsigned long)cxt->p + sz, 4);
+
+	/* check for overflow */
+	if (p > cxt->pstr) {
+		cxt->overflow = 1;
+		return;
+	}
+
+	memcpy(cxt->p, data, sz);
+	if ((sz & 3) != 0)
+		memset(cxt->p + sz, 0, 4 - (sz & 3));
+	cxt->p = p;
+}
+
+void ft_begin_node(struct ft_cxt *cxt, const char *name)
+{
+	ft_put_word(cxt, OF_DT_BEGIN_NODE);
+	ft_put_bin(cxt, name, strlen(name) + 1);
+}
+
+void ft_end_node(struct ft_cxt *cxt)
+{
+	ft_put_word(cxt, OF_DT_END_NODE);
+}
+
+void ft_nop(struct ft_cxt *cxt)
+{
+	ft_put_word(cxt, OF_DT_NOP);
+}
+
+static int lookup_string(struct ft_cxt *cxt, const char *name)
+{
+	u8 *p;
+
+	p = cxt->pstr;
+	while (p < cxt->pstr_begin) {
+		if (strcmp(p, name) == 0)
+			return p - cxt->p_begin;
+		p += strlen(p) + 1;
+	}
+
+	return -1;
+}
+
+void ft_prop(struct ft_cxt *cxt, const char *name, const void *data, int sz)
+{
+	int len, off;
+
+	if (cxt->overflow)
+		return;
+
+	len = strlen(name) + 1;
+
+	off = lookup_string(cxt, name);
+	if (off == -1) {
+		/* check if we have space */
+		if (cxt->p + 12 + sz + len > cxt->pstr) {
+			cxt->overflow = 1;
+			return;
+		}
+
+		cxt->pstr -= len;
+		memcpy(cxt->pstr, name, len);
+		off = cxt->pstr - cxt->p_begin;
+	}
+
+	/* now put offset from beginning of *STRUCTURE* */
+	/* will be fixed up at the end */
+	ft_put_word(cxt, OF_DT_PROP);
+	ft_put_word(cxt, sz);
+	ft_put_word(cxt, off);
+	ft_put_bin(cxt, data, sz);
+}
+
+void ft_prop_str(struct ft_cxt *cxt, const char *name, const char *str)
+{
+	ft_prop(cxt, name, str, strlen(str) + 1);
+}
+
+void ft_prop_int(struct ft_cxt *cxt, const char *name, int val)
+{
+	u32 v = cpu_to_be32((u32) val);
+
+	ft_prop(cxt, name, &v, 4);
+}
+
+/* start construction of the flat OF tree */
+void ft_begin(struct ft_cxt *cxt, void *blob, int max_size)
+{
+	struct boot_param_header *bph = blob;
+	u32 off;
+
+	/* clear the cxt */
+	memset(cxt, 0, sizeof(*cxt));
+
+	cxt->bph = bph;
+	cxt->max_size = max_size;
+
+	/* zero everything in the header area */
+	memset(bph, 0, sizeof(*bph));
+
+	bph->magic = cpu_to_be32(OF_DT_HEADER);
+	bph->version = cpu_to_be32(0x10);
+	bph->last_comp_version = cpu_to_be32(0x10);
+
+	/* start pointers */
+	cxt->pres_begin = (u8 *) _ALIGN((unsigned long)(bph + 1), 8);
+	cxt->pres = cxt->pres_begin;
+
+	off = (unsigned long)cxt->pres_begin - (unsigned long)bph;
+	bph->off_mem_rsvmap = cpu_to_be32(off);
+
+	((u64 *) cxt->pres)[0] = 0;	/* phys = 0, size = 0, terminate */
+	((u64 *) cxt->pres)[1] = 0;
+
+	cxt->p_anchor = cxt->pres + 16;	/* over the terminator */
+}
+
+/* add a reserver physical area to the rsvmap */
+void ft_add_rsvmap(struct ft_cxt *cxt, u64 physaddr, u64 size)
+{
+	((u64 *) cxt->pres)[0] = cpu_to_be64(physaddr);	/* phys = 0, size = 0, terminate */
+	((u64 *) cxt->pres)[1] = cpu_to_be64(size);
+
+	cxt->pres += 18;	/* advance */
+
+	((u64 *) cxt->pres)[0] = 0;	/* phys = 0, size = 0, terminate */
+	((u64 *) cxt->pres)[1] = 0;
+
+	/* keep track of size */
+	cxt->res_size = cxt->pres + 16 - cxt->pres_begin;
+
+	cxt->p_anchor = cxt->pres + 16;	/* over the terminator */
+}
+
+void ft_begin_tree(struct ft_cxt *cxt)
+{
+	cxt->p_begin = cxt->p_anchor;
+	cxt->pstr_begin = (char *)cxt->bph + cxt->max_size;	/* point at the end */
+
+	cxt->p = cxt->p_begin;
+	cxt->pstr = cxt->pstr_begin;
+}
+
+int ft_end_tree(struct ft_cxt *cxt)
+{
+	struct boot_param_header *bph = cxt->bph;
+	int off, sz, sz1;
+	u32 tag, v;
+	u8 *p;
+
+	ft_put_word(cxt, OF_DT_END);
+
+	if (cxt->overflow)
+		return -ENOMEM;
+
+	/* size of the areas */
+	cxt->struct_size = cxt->p - cxt->p_begin;
+	cxt->strings_size = cxt->pstr_begin - cxt->pstr;
+
+	/* the offset we must move */
+	off = (cxt->pstr_begin - cxt->p_begin) - cxt->strings_size;
+
+	/* the new strings start */
+	cxt->pstr_begin = cxt->p_begin + cxt->struct_size;
+
+	/* move the whole string area */
+	memmove(cxt->pstr_begin, cxt->pstr, cxt->strings_size);
+
+	/* now perform the fixup of the strings */
+	p = cxt->p_begin;
+	while ((tag = be32_to_cpu(*(u32 *) p)) != OF_DT_END) {
+		p += 4;
+
+		if (tag == OF_DT_BEGIN_NODE) {
+			p = (u8 *) _ALIGN((unsigned long)p + strlen(p) + 1, 4);
+			continue;
+		}
+
+		if (tag == OF_DT_END_NODE || tag == OF_DT_NOP)
+			continue;
+
+		if (tag != OF_DT_PROP)
+			return -EINVAL;
+
+		sz = be32_to_cpu(*(u32 *) p);
+		p += 4;
+
+		v = be32_to_cpu(*(u32 *) p);
+		v -= off;
+		*(u32 *) p = cpu_to_be32(v);	/* move down */
+		p += 4;
+
+		p = (u8 *) _ALIGN((unsigned long)p + sz, 4);
+	}
+
+	/* fix sizes */
+	p = (char *)cxt->bph;
+	sz = (cxt->pstr_begin + cxt->strings_size) - p;
+	sz1 = _ALIGN(sz, 16);	/* align at 16 bytes */
+	if (sz != sz1)
+		memset(p + sz, 0, sz1 - sz);
+	bph->totalsize = cpu_to_be32(sz1);
+	bph->off_dt_struct = cpu_to_be32(cxt->p_begin - p);
+	bph->off_dt_strings = cpu_to_be32(cxt->pstr_begin - p);
+
+	/* the new strings start */
+	cxt->pstr_begin = cxt->p_begin + cxt->struct_size;
+	cxt->pstr = cxt->pstr_begin + cxt->strings_size;
+
+	return 0;
+}
+
+/**********************************************************************/
+
+static inline int isprint(int c)
+{
+	return c >= 0x20 && c <= 0x7e;
+}
+
+static int is_printable_string(const void *data, int len)
+{
+	const char *s = data;
+	const char *ss;
+
+	/* zero length is not */
+	if (len == 0)
+		return 0;
+
+	/* must terminate with zero */
+	if (s[len - 1] != '\0')
+		return 0;
+
+	ss = s;
+	while (*s && isprint(*s))
+		s++;
+
+	/* not zero, or not done yet */
+	if (*s != '\0' || (s + 1 - ss) < len)
+		return 0;
+
+	return 1;
+}
+
+static void print_data(const void *data, int len)
+{
+	int i;
+	const u8 *s;
+
+	/* no data, don't print */
+	if (len == 0)
+		return;
+
+	if (is_printable_string(data, len)) {
+		printf(" = \"%s\"", (char *)data);
+		return;
+	}
+
+	switch (len) {
+	case 1:		/* byte */
+		printf(" = <0x%02x>", (*(u8 *) data) & 0xff);
+		break;
+	case 2:		/* half-word */
+		printf(" = <0x%04x>", be16_to_cpu(*(u16 *) data) & 0xffff);
+		break;
+	case 4:		/* word */
+		printf(" = <0x%08x>", be32_to_cpu(*(u32 *) data) & 0xffffffffU);
+		break;
+	case 8:		/* double-word */
+		printf(" = <0x%16llx>", be64_to_cpu(*(uint64_t *) data));
+		break;
+	default:		/* anything else... hexdump */
+		printf(" = [");
+		for (i = 0, s = data; i < len; i++)
+			printf("%02x%s", s[i], i < len - 1 ? " " : "");
+		printf("]");
+
+		break;
+	}
+}
+
+void ft_dump_blob(const void *bphp)
+{
+	const struct boot_param_header *bph = bphp;
+	const uint64_t *p_rsvmap = (const uint64_t *)
+		((const char *)bph + be32_to_cpu(bph->off_mem_rsvmap));
+	const u32 *p_struct = (const u32 *)
+		((const char *)bph + be32_to_cpu(bph->off_dt_struct));
+	const u32 *p_strings = (const u32 *)
+		((const char *)bph + be32_to_cpu(bph->off_dt_strings));
+	u32 tag;
+	const u32 *p;
+	const char *s, *t;
+	int depth, sz, shift;
+	int i;
+	uint64_t addr, size;
+
+	if (be32_to_cpu(bph->magic) != OF_DT_HEADER) {
+		/* not valid tree */
+		return;
+	}
+
+	depth = 0;
+	shift = 4;
+
+	for (i = 0;; i++) {
+		addr = be64_to_cpu(p_rsvmap[i * 2]);
+		size = be64_to_cpu(p_rsvmap[i * 2 + 1]);
+		if (addr == 0 && size == 0)
+			break;
+
+		printf("/memreserve/ 0x%llx 0x%llx;\n", addr, size);
+	}
+
+	p = p_struct;
+	while ((tag = be32_to_cpu(*p++)) != OF_DT_END) {
+
+		/* printf("tag: 0x%08x (%d)\n", tag, p - p_struct); */
+
+		if (tag == OF_DT_BEGIN_NODE) {
+			s = (const char *)p;
+			p = (u32 *) _ALIGN((unsigned long)p + strlen(s) + 1, 4);
+
+			printf("%*s%s {\n", depth * shift, "", s);
+
+			depth++;
+			continue;
+		}
+
+		if (tag == OF_DT_END_NODE) {
+			depth--;
+
+			printf("%*s};\n", depth * shift, "");
+			continue;
+		}
+
+		if (tag == OF_DT_NOP) {
+			printf("%*s[NOP]\n", depth * shift, "");
+			continue;
+		}
+
+		if (tag != OF_DT_PROP) {
+			fprintf(stderr, "%*s ** Unknown tag 0x%08x\n",
+				depth * shift, "", tag);
+			break;
+		}
+		sz = be32_to_cpu(*p++);
+		s = (const char *)p_strings + be32_to_cpu(*p++);
+		t = (const char *)p;
+		p = (const u32 *)_ALIGN((unsigned long)p + sz, 4);
+		printf("%*s%s", depth * shift, "", s);
+		print_data(t, sz);
+		printf(";\n");
+	}
+}
+
+void ft_backtrack_node(struct ft_cxt *cxt)
+{
+	if (be32_to_cpu(*(u32 *) (cxt->p - 4)) != OF_DT_END_NODE)
+		return;		/* XXX only for node */
+
+	cxt->p -= 4;
+}
+
+/* note that the root node of the blob is "peeled" off */
+void ft_merge_blob(struct ft_cxt *cxt, void *blob)
+{
+	struct boot_param_header *bph = (struct boot_param_header *)blob;
+	u32 *p_struct = (u32 *) ((char *)bph + be32_to_cpu(bph->off_dt_struct));
+	u32 *p_strings =
+	    (u32 *) ((char *)bph + be32_to_cpu(bph->off_dt_strings));
+	u32 tag, *p;
+	char *s, *t;
+	int depth, sz;
+
+	if (be32_to_cpu(*(u32 *) (cxt->p - 4)) != OF_DT_END_NODE)
+		return;		/* XXX only for node */
+
+	cxt->p -= 4;
+
+	depth = 0;
+	p = p_struct;
+	while ((tag = be32_to_cpu(*p++)) != OF_DT_END) {
+
+		/* printf("tag: 0x%08x (%d) - %d\n", tag, p - p_struct, depth); */
+
+		if (tag == OF_DT_BEGIN_NODE) {
+			s = (char *)p;
+			p = (u32 *) _ALIGN((unsigned long)p + strlen(s) + 1, 4);
+
+			if (depth++ > 0)
+				ft_begin_node(cxt, s);
+
+			continue;
+		}
+
+		if (tag == OF_DT_END_NODE) {
+			ft_end_node(cxt);
+			if (--depth == 0)
+				break;
+			continue;
+		}
+
+		if (tag == OF_DT_NOP)
+			continue;
+
+		if (tag != OF_DT_PROP)
+			break;
+
+		sz = be32_to_cpu(*p++);
+		s = (char *)p_strings + be32_to_cpu(*p++);
+		t = (char *)p;
+		p = (u32 *) _ALIGN((unsigned long)p + sz, 4);
+
+		ft_prop(cxt, s, t, sz);
+	}
+}
+
+void *ft_get_prop(void *bphp, const char *propname, int *szp)
+{
+	struct boot_param_header *bph = bphp;
+	uint32_t *p_struct =
+	    (uint32_t *) ((char *)bph + be32_to_cpu(bph->off_dt_struct));
+	uint32_t *p_strings =
+	    (uint32_t *) ((char *)bph + be32_to_cpu(bph->off_dt_strings));
+	uint32_t version = be32_to_cpu(bph->version);
+	uint32_t tag;
+	uint32_t *p;
+	char *s, *t;
+	char *ss;
+	int sz;
+	static char path[256], prop[256];
+
+	path[0] = '\0';
+
+	p = p_struct;
+	while ((tag = be32_to_cpu(*p++)) != OF_DT_END) {
+
+		if (tag == OF_DT_BEGIN_NODE) {
+			s = (char *)p;
+			p = (uint32_t *) _ALIGN((unsigned long)p + strlen(s) +
+						1, 4);
+			strcat(path, s);
+			strcat(path, "/");
+			continue;
+		}
+
+		if (tag == OF_DT_END_NODE) {
+			path[strlen(path) - 1] = '\0';
+			ss = strrchr(path, '/');
+			if (ss != NULL)
+				ss[1] = '\0';
+			continue;
+		}
+
+		if (tag == OF_DT_NOP)
+			continue;
+
+		if (tag != OF_DT_PROP)
+			break;
+
+		sz = be32_to_cpu(*p++);
+		s = (char *)p_strings + be32_to_cpu(*p++);
+		if (version < 0x10 && sz >= 8)
+			p = (uint32_t *) _ALIGN((unsigned long)p, 8);
+		t = (char *)p;
+		p = (uint32_t *) _ALIGN((unsigned long)p + sz, 4);
+
+		strcpy(prop, path);
+		strcat(prop, s);
+
+		if (strcmp(prop, propname) == 0) {
+			*szp = sz;
+			return t;
+		}
+	}
+
+	return NULL;
+}
+
+/********************************************************************/
+
+extern unsigned char oftree_dtb[];
+extern unsigned int oftree_dtb_len;
+
+/* Function that returns a character from the environment */
+extern uchar(*env_get_char) (int);
+
+#define BDM(x)	{	.name = #x, .offset = offsetof(bd_t, bi_ ##x ) }
+
+static const struct {
+	const char *name;
+	int offset;
+} bd_map[] = {
+	BDM(memstart),
+	BDM(memsize),
+	BDM(flashstart),
+	BDM(flashsize),
+	BDM(flashoffset),
+	BDM(sramstart),
+	BDM(sramsize),
+#if defined(CONFIG_5xx) || defined(CONFIG_8xx) || defined(CONFIG_8260) \
+	|| defined(CONFIG_E500)
+	BDM(immr_base),
+#endif
+#if defined(CONFIG_MPC5xxx)
+	BDM(mbar_base),
+#endif
+#if defined(CONFIG_MPC83XX)
+	BDM(immrbar),
+#endif
+#if defined(CONFIG_MPC8220)
+	BDM(mbar_base),
+	BDM(inpfreq),
+	BDM(pcifreq),
+	BDM(pevfreq),
+	BDM(flbfreq),
+	BDM(vcofreq),
+#endif
+	BDM(bootflags),
+	BDM(ip_addr),
+	BDM(intfreq),
+	BDM(busfreq),
+#ifdef CONFIG_CPM2
+	BDM(cpmfreq),
+	BDM(brgfreq),
+	BDM(sccfreq),
+	BDM(vco),
+#endif
+#if defined(CONFIG_MPC5xxx)
+	BDM(ipbfreq),
+	BDM(pcifreq),
+#endif
+	BDM(baudrate),
+};
+
+void ft_setup(void *blob, int size, bd_t * bd)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+	u8 *end;
+	u32 *p;
+	int len;
+	struct ft_cxt cxt;
+	int i, k, nxt;
+	static char tmpenv[256];
+	char *s, *lval, *rval;
+	ulong clock;
+	uint32_t v;
+
+	/* disable OF tree; booting old kernel */
+	if (getenv("disable_of") != NULL) {
+		memcpy(blob, bd, sizeof(*bd));
+		return;
+	}
+
+	ft_begin(&cxt, blob, size);
+
+	/* fs_add_rsvmap not used */
+
+	ft_begin_tree(&cxt);
+
+	ft_begin_node(&cxt, "");
+
+	ft_end_node(&cxt);
+
+	/* copy RO tree */
+	ft_merge_blob(&cxt, oftree_dtb);
+
+	/* back into root */
+	ft_backtrack_node(&cxt);
+
+	ft_begin_node(&cxt, "u-boot-env");
+
+	for (i = 0; env_get_char(i) != '\0'; i = nxt + 1) {
+		for (nxt = i; env_get_char(nxt) != '\0'; ++nxt) ;
+		s = tmpenv;
+		for (k = i; k < nxt && s < &tmpenv[sizeof(tmpenv) - 1]; ++k)
+			*s++ = env_get_char(k);
+		*s++ = '\0';
+		lval = tmpenv;
+		s = strchr(tmpenv, '=');
+		if (s != NULL) {
+			*s++ = '\0';
+			rval = s;
+		} else
+			continue;
+		ft_prop_str(&cxt, lval, rval);
+	}
+
+	ft_end_node(&cxt);
+
+	ft_begin_node(&cxt, "chosen");
+
+	ft_prop_str(&cxt, "name", "chosen");
+	ft_prop_str(&cxt, "bootargs", getenv("bootargs"));
+	ft_prop_int(&cxt, "linux,platform", 0x600);	/* what is this? */
+
+	ft_end_node(&cxt);
+
+	ft_end_node(&cxt);	/* end root */
+
+	ft_end_tree(&cxt);
+
+	/*
+	   printf("merged OF-tree\n");
+	   ft_dump_blob(blob);
+	 */
+
+	/* paste the bd_t at the end of the flat tree */
+	end = (char *)blob +
+	    be32_to_cpu(((struct boot_param_header *)blob)->totalsize);
+	memcpy(end, bd, sizeof(*bd));
+
+#ifdef CONFIG_PPC
+
+	for (i = 0; i < sizeof(bd_map)/sizeof(bd_map[0]); i++) {
+		sprintf(tmpenv, "/bd_t/%s", bd_map[i].name);
+		v = *(uint32_t *)((char *)bd + bd_map[i].offset);
+
+		p = ft_get_prop(blob, tmpenv, &len);
+		if (p != NULL)
+			*p = cpu_to_be32(v);
+	}
+
+	p = ft_get_prop(blob, "/bd_t/enetaddr", &len);
+	if (p != NULL)
+		memcpy(p, bd->bi_enetaddr, 6);
+
+	p = ft_get_prop(blob, "/bd_t/ethspeed", &len);
+	if (p != NULL)
+		*p = cpu_to_be32((uint32_t) bd->bi_ethspeed);
+
+	clock = bd->bi_intfreq;
+	p = ft_get_prop(blob, "/cpus/" OF_CPU "/clock-frequency", &len);
+	if (p != NULL)
+		*p = cpu_to_be32(clock);
+
+#ifdef OF_TBCLK
+	clock = OF_TBCLK;
+	p = ft_get_prop(blob, "/cpus/" OF_CPU "/timebase-frequency", &len);
+	if (p != NULL)
+		*p = cpu_to_be32(OF_TBCLK);
+#endif
+
+#endif				/* __powerpc__ */
+
+	/*
+	   printf("final OF-tree\n");
+	   ft_dump_blob(blob);
+	 */
+
+}
+
+#endif