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of/flattree: merge of_get_flat_dt_root

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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 2009-11-23 19:44:23 -07:00
parent c8cb7a5984
commit 819d281930
3 changed files with 16 additions and 24 deletions
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12
arch/microblaze/kernel/prom.c
View File

@ -50,18 +50,6 @@ typedef u32 cell_t;
/* export that to outside world */
struct device_node *of_chosen;
unsigned long __init of_get_flat_dt_root(void)
{
unsigned long p = ((unsigned long)initial_boot_params) +
initial_boot_params->off_dt_struct;
while (*((u32 *)p) == OF_DT_NOP)
p += 4;
BUG_ON(*((u32 *)p) != OF_DT_BEGIN_NODE);
p += 4;
return _ALIGN(p + strlen((char *)p) + 1, 4);
}
/**
* This function can be used within scan_flattened_dt callback to get
* access to properties

12
arch/powerpc/kernel/prom.c
View File

@ -80,18 +80,6 @@ extern rwlock_t devtree_lock; /* temporary while merging */
/* export that to outside world */
struct device_node *of_chosen;
unsigned long __init of_get_flat_dt_root(void)
{
unsigned long p = ((unsigned long)initial_boot_params) +
initial_boot_params->off_dt_struct;
while(*((u32 *)p) == OF_DT_NOP)
p += 4;
BUG_ON (*((u32 *)p) != OF_DT_BEGIN_NODE);
p += 4;
return _ALIGN(p + strlen((char *)p) + 1, 4);
}
/**
* This function can be used within scan_flattened_dt callback to get
* access to properties

16
drivers/of/fdt.c
View File

@ -83,3 +83,19 @@ int __init of_scan_flat_dt(int (*it)(unsigned long node,
return rc;
}
/**
* of_get_flat_dt_root - find the root node in the flat blob
*/
unsigned long __init of_get_flat_dt_root(void)
{
unsigned long p = ((unsigned long)initial_boot_params) +
initial_boot_params->off_dt_struct;
while (*((u32 *)p) == OF_DT_NOP)
p += 4;
BUG_ON(*((u32 *)p) != OF_DT_BEGIN_NODE);
p += 4;
return _ALIGN(p + strlen((char *)p) + 1, 4);
}