diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/fdtdec.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/lib/fdtdec.c b/lib/fdtdec.c index 78576b530f..da94bc5e15 100644 --- a/lib/fdtdec.c +++ b/lib/fdtdec.c @@ -1106,6 +1106,51 @@ int fdtdec_setup_memory_banksize(void) return 0; } + +int fdtdec_setup_mem_size_base_lowest(void) +{ + int bank, ret, mem, reg = 0; + struct fdt_resource res; + unsigned long base; + phys_size_t size; + const void *blob = gd->fdt_blob; + + gd->ram_base = (unsigned long)~0; + + mem = get_next_memory_node(blob, -1); + if (mem < 0) { + debug("%s: Missing /memory node\n", __func__); + return -EINVAL; + } + + for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) { + ret = fdt_get_resource(blob, mem, "reg", reg++, &res); + if (ret == -FDT_ERR_NOTFOUND) { + reg = 0; + mem = get_next_memory_node(blob, mem); + if (mem == -FDT_ERR_NOTFOUND) + break; + + ret = fdt_get_resource(blob, mem, "reg", reg++, &res); + if (ret == -FDT_ERR_NOTFOUND) + break; + } + if (ret != 0) + return -EINVAL; + + base = (unsigned long)res.start; + size = (phys_size_t)(res.end - res.start + 1); + + if (gd->ram_base > base && size) { + gd->ram_base = base; + gd->ram_size = size; + debug("%s: Initial DRAM base %lx size %lx\n", + __func__, base, (unsigned long)size); + } + } + + return 0; +} #endif #if CONFIG_IS_ENABLED(MULTI_DTB_FIT) |