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author | Grant Likely <grant.likely@secretlab.ca> | 2010-02-02 04:34:14 (GMT) |
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committer | Grant Likely <grant.likely@secretlab.ca> | 2010-02-09 15:33:10 (GMT) |
commit | 51975db0b7333cf389b64b5040c2a910341d241a (patch) | |
tree | aba9d6bf56eec915265a8b630c3192affc2a549c /drivers/of/fdt.c | |
parent | 71a157e8edca55198e808f8561dd49017a54ee34 (diff) | |
download | linux-fsl-qoriq-51975db0b7333cf389b64b5040c2a910341d241a.tar.xz |
of/flattree: merge early_init_dt_scan_memory() common code
Merge common code between PowerPC and Microblaze architectures.
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Michal Simek <monstr@monstr.eu>
Diffstat (limited to 'drivers/of/fdt.c')
-rw-r--r-- | drivers/of/fdt.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c index 7f88611..f84152d 100644 --- a/drivers/of/fdt.c +++ b/drivers/of/fdt.c @@ -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, ®); + size = dt_mem_next_cell(dt_root_size_cells, ®); + + 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) { |