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of/flattree: merge early_init_dt_scan_memory() common code

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Merge common code between PowerPC and Microblaze architectures.

Signed-off-by: Grant Likely <[email protected]>
Acked-by: Michal Simek <[email protected]>
This commit is contained in:
Grant Likely 2010-02-01 21:34:14 -07:00
commit 51975db0b7
4 changed files with 73 additions and 100 deletions
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50
drivers/of/fdt.c
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@ -15,6 +15,7 @@
#include <linux/of.h>
#include <linux/of_fdt.h>
#ifdef CONFIG_PPC
#include <asm/machdep.h>
#endif /* CONFIG_PPC */
@ -443,6 +444,55 @@ u64 __init dt_mem_next_cell(int s, u32 **cellp)
return of_read_number(p, s);
}
/**
* early_init_dt_scan_memory - Look for an parse memory nodes
*/
int __init early_init_dt_scan_memory(unsigned long node, const char *uname,
int depth, void *data)
{
char *type = of_get_flat_dt_prop(node, "device_type", NULL);
__be32 *reg, *endp;
unsigned long l;
/* We are scanning "memory" nodes only */
if (type == NULL) {
/*
* The longtrail doesn't have a device_type on the
* /memory node, so look for the node called /memory@0.
*/
if (depth != 1 || strcmp(uname, "memory@0") != 0)
return 0;
} else if (strcmp(type, "memory") != 0)
return 0;
reg = of_get_flat_dt_prop(node, "linux,usable-memory", &l);
if (reg == NULL)
reg = of_get_flat_dt_prop(node, "reg", &l);
if (reg == NULL)
return 0;
endp = reg + (l / sizeof(__be32));
pr_debug("memory scan node %s, reg size %ld, data: %x %x %x %x,\n",
uname, l, reg[0], reg[1], reg[2], reg[3]);
while ((endp - reg) >= (dt_root_addr_cells + dt_root_size_cells)) {
u64 base, size;
base = dt_mem_next_cell(dt_root_addr_cells, &reg);
size = dt_mem_next_cell(dt_root_size_cells, &reg);
if (size == 0)
continue;
pr_debug(" - %llx , %llx\n", (unsigned long long)base,
(unsigned long long)size);
early_init_dt_add_memory_arch(base, size);
}
return 0;
}
int __init early_init_dt_scan_chosen(unsigned long node, const char *uname,
int depth, void *data)
{