diff options
Diffstat (limited to 'common')
| -rw-r--r-- | common/cmd_bootm.c | 42 | ||||
| -rw-r--r-- | common/ft_build.c | 331 |
2 files changed, 126 insertions, 247 deletions
diff --git a/common/cmd_bootm.c b/common/cmd_bootm.c index e5d70fa..0225cb7 100644 --- a/common/cmd_bootm.c +++ b/common/cmd_bootm.c @@ -465,6 +465,13 @@ U_BOOT_CMD( "[addr [arg ...]]\n - boot application image stored in memory\n" "\tpassing arguments 'arg ...'; when booting a Linux kernel,\n" "\t'arg' can be the address of an initrd image\n" +#ifdef CONFIG_OF_FLAT_TREE + "\tWhen booting a Linux kernel which requires a flat device-tree\n" + "\ta third argument is required which is the address of the of the\n" + "\tdevice-tree blob. To boot that kernel without an initrd image,\n" + "\tuse a '-' for the second argument. If you do not pass a third\n" + "\ta bd_info struct will be passed instead\n" +#endif ); #ifdef CONFIG_SILENT_CONSOLE @@ -500,11 +507,6 @@ fixup_silent_linux () } #endif /* CONFIG_SILENT_CONSOLE */ -#ifdef CONFIG_OF_FLAT_TREE -extern const unsigned char oftree_dtb[]; -extern const unsigned int oftree_dtb_len; -#endif - #ifdef CONFIG_PPC static void do_bootm_linux (cmd_tbl_t *cmdtp, int flag, @@ -616,7 +618,17 @@ do_bootm_linux (cmd_tbl_t *cmdtp, int flag, /* * Check if there is an initrd image */ + +#ifdef CONFIG_OF_FLAT_TREE + /* Look for a '-' which indicates to ignore the ramdisk argument */ + if (argc >= 3 && strcmp(argv[2], "-") == 0) { + debug ("Skipping initrd\n"); + data = 0; + } + else +#endif if (argc >= 3) { + debug ("Not skipping initrd\n"); SHOW_BOOT_PROGRESS (9); addr = simple_strtoul(argv[2], NULL, 16); @@ -724,6 +736,15 @@ do_bootm_linux (cmd_tbl_t *cmdtp, int flag, len = data = 0; } +#ifdef CONFIG_OF_FLAT_TREE + if (argc >= 3) + { + of_flat_tree = (char *) simple_strtoul(argv[3], NULL, 16); + printf ("Booting using flat device tree at 0x%x\n", + of_flat_tree); + } +#endif + if (!data) { debug ("No initrd\n"); } @@ -793,15 +814,6 @@ do_bootm_linux (cmd_tbl_t *cmdtp, int flag, initrd_end = 0; } -#ifdef CONFIG_OF_FLAT_TREE - if (initrd_start == 0) - of_flat_tree = (char *)(((ulong)kbd - OF_FLAT_TREE_MAX_SIZE - - sizeof(bd_t)) & ~0xF); - else - of_flat_tree = (char *)((initrd_start - OF_FLAT_TREE_MAX_SIZE - - sizeof(bd_t)) & ~0xF); -#endif - debug ("## Transferring control to Linux (at address %08lx) ...\n", (ulong)kernel); @@ -824,7 +836,7 @@ do_bootm_linux (cmd_tbl_t *cmdtp, int flag, (*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end); #else - ft_setup(of_flat_tree, OF_FLAT_TREE_MAX_SIZE, kbd, initrd_start, initrd_end); + ft_setup(of_flat_tree, kbd, initrd_start, initrd_end); /* ft_dump_blob(of_flat_tree); */ #if defined(CFG_INIT_RAM_LOCK) && (!defined(CONFIG_E500)||!defined(CONFIG_MPC86xx)) diff --git a/common/ft_build.c b/common/ft_build.c index 782046d..b5a997c 100644 --- a/common/ft_build.c +++ b/common/ft_build.c @@ -1,5 +1,22 @@ /* * OF flat tree builder + * Written by: Pantelis Antoniou <pantelis.antoniou@gmail.com> + * Updated by: Matthew McClintock <msm@freescale.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA */ #include <common.h> @@ -13,44 +30,39 @@ #include <ft_build.h> +#undef DEBUG + /* align addr on a size boundary - adjust address up if needed -- Cort */ #define _ALIGN(addr,size) (((addr)+(size)-1)&(~((size)-1))) +#ifndef CONFIG_OF_BOOT_CPU +#define CONFIG_OF_BOOT_CPU 0 +#endif +#define SIZE_OF_RSVMAP_ENTRY (2*sizeof(u64)) 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; - } + memmove(cxt->p + sizeof(u32), cxt->p, cxt->p_end - cxt->p); *(u32 *) cxt->p = cpu_to_be32(v); - cxt->p += 4; + cxt->p += sizeof(u32); + cxt->p_end += sizeof(u32); } static inline void ft_put_bin(struct ft_cxt *cxt, const void *data, int sz) { - u8 *p; + int aligned_size = ((u8 *)_ALIGN((unsigned long)cxt->p + sz, + sizeof(u32))) - cxt->p; - if (cxt->overflow) /* do nothing */ - return; - - /* next pointer pos */ - p = (u8 *) _ALIGN((unsigned long)cxt->p + sz, 4); + memmove(cxt->p + aligned_size, cxt->p, cxt->p_end - cxt->p); - /* check for overflow */ - if (p > cxt->pstr) { - cxt->overflow = 1; - return; - } + /* make sure the last bytes are zeroed */ + memset(cxt->p + aligned_size - (aligned_size % sizeof(u32)), 0, + (aligned_size % sizeof(u32))); memcpy(cxt->p, data, sz); - if ((sz & 3) != 0) - memset(cxt->p + sz, 0, 4 - (sz & 3)); - cxt->p = p; + + cxt->p += aligned_size; + cxt->p_end += aligned_size; } void ft_begin_node(struct ft_cxt *cxt, const char *name) @@ -73,10 +85,10 @@ static int lookup_string(struct ft_cxt *cxt, const char *name) { u8 *p; - p = cxt->pstr; - while (p < cxt->pstr_begin) { + p = cxt->p; + while (p < cxt->p_end) { if (strcmp(p, name) == 0) - return p - cxt->p_begin; + return p - cxt->p; p += strlen(p) + 1; } @@ -85,24 +97,13 @@ static int lookup_string(struct ft_cxt *cxt, const char *name) 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; + int off = 0; 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; + memcpy(cxt->p_end, name, strlen(name) + 1); + off = cxt->p_end - cxt->p; + cxt->p_end += strlen(name) + 2; } /* now put offset from beginning of *STRUCTURE* */ @@ -122,138 +123,63 @@ 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); + ft_prop(cxt, name, &v, sizeof(u32)); } -/* start construction of the flat OF tree */ -void ft_begin(struct ft_cxt *cxt, void *blob, int max_size) +/* pick up and start working on a tree in place */ +void ft_init_cxt(struct ft_cxt *cxt, void *blob) { 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); + bph->boot_cpuid_phys = CONFIG_OF_BOOT_CPU; - /* 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; + /* find beginning and end of reserve map table (zeros in last entry) */ + cxt->p_rsvmap = (u8 *)bph + bph->off_mem_rsvmap; + while ( ((uint64_t *)cxt->p_rsvmap)[0] != 0 && + ((uint64_t *)cxt->p_rsvmap)[1] != 0 ) { + cxt->p_rsvmap += SIZE_OF_RSVMAP_ENTRY; + } - cxt->p_anchor = cxt->pres + 16; /* over the terminator */ + cxt->p_start = (char*)bph + bph->off_dt_struct; + cxt->p_end = (char *)bph + bph->totalsize; + cxt->p = (char *)bph + bph->off_dt_strings; } /* add a reserver physical area to the rsvmap */ -void ft_add_rsvmap(struct ft_cxt *cxt, u64 physaddr, u64 size) +void ft_add_rsvmap(struct ft_cxt *cxt, u64 physstart, u64 physend) { - ((u64 *) cxt->pres)[0] = cpu_to_be64(physaddr); /* phys = 0, size = 0, terminate */ - ((u64 *) cxt->pres)[1] = cpu_to_be64(size); - - cxt->pres += 16; /* 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 */ + memmove(cxt->p_rsvmap + SIZE_OF_RSVMAP_ENTRY, cxt->p_rsvmap, + cxt->p_end - cxt->p_rsvmap); + + ((u64 *)cxt->p_rsvmap)[0] = cpu_to_be64(physstart); + ((u64 *)cxt->p_rsvmap)[1] = cpu_to_be64(physend); + ((u64 *)cxt->p_rsvmap)[2] = 0; + ((u64 *)cxt->p_rsvmap)[3] = 0; + + cxt->p_rsvmap += SIZE_OF_RSVMAP_ENTRY; + cxt->p_start += SIZE_OF_RSVMAP_ENTRY; + cxt->p += SIZE_OF_RSVMAP_ENTRY; + cxt->p_end += SIZE_OF_RSVMAP_ENTRY; } -void ft_begin_tree(struct ft_cxt *cxt) +void ft_end_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; + ft_put_word(cxt, OF_DT_END); } -int ft_end_tree(struct ft_cxt *cxt) -{ +/* update the boot param header with correct values */ +void ft_finalize_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; + bph->totalsize = cxt->p_end - (u8 *)bph; + bph->off_dt_struct = cxt->p_start - (u8 *)bph; + bph->off_dt_strings = cxt->p - (u8 *)bph; + bph->dt_strings_size = cxt->p_end - cxt->p; } -/**********************************************************************/ - static inline int isprint(int c) { return c >= 0x20 && c <= 0x7e; @@ -381,8 +307,8 @@ void ft_dump_blob(const void *bphp) } if (tag != OF_DT_PROP) { - fprintf(stderr, "%*s ** Unknown tag 0x%08x\n", - depth * shift, "", tag); + fprintf(stderr, "%*s ** Unknown tag 0x%08x at 0x%x\n", + depth * shift, "", tag, --p); break; } sz = be32_to_cpu(*p++); @@ -397,64 +323,15 @@ void ft_dump_blob(const void *bphp) 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; + int i = 4; - if (tag != OF_DT_PROP) - break; + while (be32_to_cpu(*(u32 *) (cxt->p - i)) != OF_DT_END_NODE) + i += 4; - sz = be32_to_cpu(*p++); - s = (char *)p_strings + be32_to_cpu(*p++); - t = (char *)p; - p = (u32 *) _ALIGN((unsigned long)p + sz, 4); + memmove (cxt->p - i, cxt->p, cxt->p_end - cxt->p); - ft_prop(cxt, s, t, sz); - } + cxt->p_end -= i; + cxt->p -= i; } void *ft_get_prop(void *bphp, const char *propname, int *szp) @@ -521,9 +398,6 @@ void *ft_get_prop(void *bphp, const char *propname, int *szp) /********************************************************************/ -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); @@ -577,7 +451,7 @@ static const struct { }; #endif -void ft_setup(void *blob, int size, bd_t * bd, ulong initrd_start, ulong initrd_end) +void ft_setup(void *blob, bd_t * bd, ulong initrd_start, ulong initrd_end) { u32 *p; int len; @@ -600,20 +474,16 @@ void ft_setup(void *blob, int size, bd_t * bd, ulong initrd_start, ulong initrd_ return; } - ft_begin(&cxt, blob, size); +#ifdef DEBUG + printf ("recieved oftree\n"); + ft_dump_blob(blob); +#endif + + ft_init_cxt(&cxt, blob); if (initrd_start && initrd_end) ft_add_rsvmap(&cxt, initrd_start, initrd_end - initrd_start + 1); - 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); @@ -642,8 +512,8 @@ void ft_setup(void *blob, int size, bd_t * bd, ulong initrd_start, ulong initrd_ #endif 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? */ if (initrd_start && initrd_end) { @@ -659,11 +529,7 @@ void ft_setup(void *blob, int size, bd_t * bd, ulong initrd_start, ulong initrd_ ft_end_node(&cxt); /* end root */ ft_end_tree(&cxt); - - /* - printf("merged OF-tree\n"); - ft_dump_blob(blob); - */ + ft_finalize_tree(&cxt); #ifdef CONFIG_OF_HAS_BD_T /* paste the bd_t at the end of the flat tree */ @@ -712,11 +578,12 @@ void ft_setup(void *blob, int size, bd_t * bd, ulong initrd_start, ulong initrd_ ft_board_setup(blob, bd); #endif - /* - printf("final OF-tree\n"); - ft_dump_blob(blob); - */ + /* in case the size changed in the platform code */ + ft_finalize_tree(&cxt); +#ifdef DEBUG + printf("final OF-tree\n"); + ft_dump_blob(blob); +#endif } - #endif |