struct machine_desc * __init setup_machine_tags(phys_addr_t __atags_pointer,
unsigned int machine_nr)
{
struct tag *tags = (struct tag *)&default_tags;
struct machine_desc *mdesc = NULL, *p;
char *from = default_command_line;
default_tags.mem.start = PHYS_OFFSET;
/*
* locate machine in the list of supported machines.
*/
for_each_machine_desc(p)
if (machine_nr == p->nr) {
printk("Machine: %s\n", p->name);
mdesc = p;
break;
}
if (!mdesc) {
early_print("\nError: unrecognized/unsupported machine ID"
" (r1 = 0x%08x).\n\n", machine_nr);
dump_machine_table(); /* does not return */
}
if (__atags_pointer)
tags = phys_to_virt(__atags_pointer);
else if (mdesc->atag_offset)
tags = (void *)(PAGE_OFFSET + mdesc->atag_offset);
#if defined(CONFIG_DEPRECATED_PARAM_STRUCT)
/*
* If we have the old style parameters, convert them to
* a tag list.
*/
if (tags->hdr.tag != ATAG_CORE)
convert_to_tag_list(tags);
#endif
if (tags->hdr.tag != ATAG_CORE) {
early_print("Warning: Neither atags nor dtb found\n");
tags = (struct tag *)&default_tags;
}
if (mdesc->fixup)
mdesc->fixup(tags, &from, &meminfo);
if (tags->hdr.tag == ATAG_CORE) {
if (meminfo.nr_banks != 0)
squash_mem_tags(tags);
save_atags(tags);
parse_tags(tags);
}
/* parse_early_param needs a boot_command_line */
strlcpy(boot_command_line, from, COMMAND_LINE_SIZE);
return mdesc;
}
/**
* setup_machine_fdt - Machine setup when an dtb was passed to the kernel
* @dt_phys: physical address of dt blob
*
* If a dtb was passed to the kernel in r2, then use it to choose the
* correct machine_desc and to setup the system.
*/
struct machine_desc * __init setup_machine_fdt(unsigned int dt_phys)
{
struct boot_param_header *devtree;
struct machine_desc *mdesc, *mdesc_best = NULL;
unsigned int score, mdesc_score = ~1;
unsigned long dt_root;
const char *model;
devtree = phys_to_virt(dt_phys);
/* check device tree validity */
if (be32_to_cpu(devtree->magic) != OF_DT_HEADER)
return NULL;
/* Search the mdescs for the 'best' compatible value match */
initial_boot_params = devtree;
dt_root = of_get_flat_dt_root();
for_each_machine_desc(mdesc) {
score = of_flat_dt_match(dt_root, mdesc->dt_compat);
if (score > 0 && score < mdesc_score) {
mdesc_best = mdesc;
mdesc_score = score;
}
}
if (!mdesc_best) {
const char *prop;
long size;
early_print("\nError: unrecognized/unsupported "
"device tree compatible list:\n[ ");
prop = of_get_flat_dt_prop(dt_root, "compatible", &size);
while (size > 0) {
early_print("'%s' ", prop);
size -= strlen(prop) + 1;
prop += strlen(prop) + 1;
}
early_print("]\n\n");
dump_machine_table(); /* does not return */
}
model = of_get_flat_dt_prop(dt_root, "model", NULL);
if (!model)
model = of_get_flat_dt_prop(dt_root, "compatible", NULL);
if (!model)
model = "<unknown>";
pr_info("Machine: %s, model: %s\n", mdesc_best->name, model);
/* Retrieve various information from the /chosen node */
of_scan_flat_dt(early_init_dt_scan_chosen, NULL);
/* Initialize {size,address}-cells info */
of_scan_flat_dt(early_init_dt_scan_root, NULL);
/* Setup memory, calling early_init_dt_add_memory_arch */
of_scan_flat_dt(early_init_dt_scan_memory, NULL);
/* Save command line for /proc/cmdline */
strlcpy(boot_command_line, cmd_line, COMMAND_LINE_SIZE);
/* Change machine number to match the mdesc we're using */
__machine_arch_type = mdesc_best->nr;
return mdesc_best;
}
struct machine_desc * __init setup_machine_fdt(unsigned int dt_phys)
{
struct boot_param_header *devtree;
struct machine_desc *mdesc, *mdesc_best = NULL;
unsigned int score, mdesc_score = ~1;
unsigned long dt_root;
const char *model;
printk("kinson:[%s]-[%d] dt_phys:0x%08x\n",__FUNCTION__,__LINE__,dt_phys);
if (!dt_phys)
return NULL;
debug_step_dt=1;
devtree = phys_to_virt(dt_phys);
printk("kinson:[%s]-[%d] devtree:0x%08x devtree->magic:0x%x 0x%x 0x%x 0x%x\n",__FUNCTION__,__LINE__,devtree,be32_to_cpu(devtree->magic),devtree->totalsize,
devtree->off_dt_struct,devtree->off_dt_strings);
/* check device tree validity */
if (be32_to_cpu(devtree->magic) != OF_DT_HEADER)
{
printk("kinson:[%s]-[%d] devtree->magic error!\n",__FUNCTION__,__LINE__);
return NULL;
}
/* Search the mdescs for the 'best' compatible value match */
initial_boot_params = devtree;
dt_root = of_get_flat_dt_root();
for_each_machine_desc(mdesc) {
#if 0
score = of_flat_dt_match(dt_root, mdesc->dt_compat);
if (score > 0 && score < mdesc_score) {
mdesc_best = mdesc;
mdesc_score = score;
}
#else //kinson
mdesc_best = mdesc;
#endif
}
debug_step_dt=2;
if (!mdesc_best) {
const char *prop;
long size;
early_print("\nError: unrecognized/unsupported "
"device tree compatible list:\n[ ");
debug_step_dt=3;
prop = of_get_flat_dt_prop(dt_root, "compatible", &size);
while (size > 0) {
early_print("'%s' ", prop);
size -= strlen(prop) + 1;
prop += strlen(prop) + 1;
}
early_print("]\n\n");
debug_step_dt=4;
dump_machine_table(); /* does not return */
}
debug_step_dt=7;
model = of_get_flat_dt_prop(dt_root, "model", NULL);
if (!model)
model = of_get_flat_dt_prop(dt_root, "compatible", NULL);
if (!model)
model = "<unknown>";
pr_info("Machine: %s, model: %s\n", mdesc_best->name, model);
debug_step_dt=8;
/* Retrieve various information from the /chosen node */
of_scan_flat_dt(early_init_dt_scan_chosen, boot_command_line);
/* Initialize {size,address}-cells info */
debug_step_dt=9;
of_scan_flat_dt(early_init_dt_scan_root, NULL);
debug_step_dt=10;
/* Setup memory, calling early_init_dt_add_memory_arch */
of_scan_flat_dt(early_init_dt_scan_memory, NULL);
debug_step_dt=11;
/* Change machine number to match the mdesc we're using */
__machine_arch_type = mdesc_best->nr;
return mdesc_best;
}
