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of/flattree: Merge early_init_dt_check_for_initrd()

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Merge common code between PowerPC and Microblaze

Signed-off-by: Grant Likely <[email protected]>
Tested-by: Wolfram Sang <[email protected]>
Acked-by: Benjamin Herrenschmidt <[email protected]>
This commit is contained in:
Grant Likely 2009-11-24 03:26:58 -07:00
commit f7b3a8355b
4 changed files with 38 additions and 62 deletions
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37
drivers/of/fdt.c
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@ -11,6 +11,7 @@
#include <linux/kernel.h>
#include <linux/lmb.h>
#include <linux/initrd.h>
#include <linux/of.h>
#include <linux/of_fdt.h>
@ -369,6 +370,42 @@ unsigned long __init unflatten_dt_node(unsigned long mem,
return mem;
}
#ifdef CONFIG_BLK_DEV_INITRD
/**
* early_init_dt_check_for_initrd - Decode initrd location from flat tree
* @node: reference to node containing initrd location ('chosen')
*/
void __init early_init_dt_check_for_initrd(unsigned long node)
{
unsigned long len;
u32 *prop;
pr_debug("Looking for initrd properties... ");
prop = of_get_flat_dt_prop(node, "linux,initrd-start", &len);
if (prop) {
initrd_start = (unsigned long)
__va(of_read_ulong(prop, len/4));
prop = of_get_flat_dt_prop(node, "linux,initrd-end", &len);
if (prop) {
initrd_end = (unsigned long)
__va(of_read_ulong(prop, len/4));
initrd_below_start_ok = 1;
} else {
initrd_start = 0;
}
}
pr_debug("initrd_start=0x%lx initrd_end=0x%lx\n",
initrd_start, initrd_end);
}
#else
inline void early_init_dt_check_for_initrd(unsigned long node)
{
}
#endif /* CONFIG_BLK_DEV_INITRD */
/**
* unflatten_device_tree - create tree of device_nodes from flat blob
*