lmb: introduce a function to add memory to the lmb memory map
Introduce a function lmb_add_memory() to add available memory to the
LMB memory map. Call this function during board init once the LMB data
structures have been initialised.
Signed-off-by: Sughosh Ganu <sughosh.ganu@linaro.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/lib/lmb.c b/lib/lmb.c
index 8be0c1a..44ecf96 100644
--- a/lib/lmb.c
+++ b/lib/lmb.c
@@ -246,6 +246,43 @@
lmb_reserve_common(fdt_blob);
}
+/**
+ * lmb_add_memory() - Add memory range for LMB allocations
+ *
+ * Add the entire available memory range to the pool of memory that
+ * can be used by the LMB module for allocations.
+ *
+ * Return: None
+ */
+void lmb_add_memory(void)
+{
+ int i;
+ phys_size_t size;
+ phys_addr_t rgn_top;
+ u64 ram_top = gd->ram_top;
+ struct bd_info *bd = gd->bd;
+
+ /* Assume a 4GB ram_top if not defined */
+ if (!ram_top)
+ ram_top = 0x100000000ULL;
+
+ for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
+ size = bd->bi_dram[i].size;
+ if (size) {
+ if (bd->bi_dram[i].start > ram_top)
+ continue;
+
+ rgn_top = bd->bi_dram[i].start +
+ bd->bi_dram[i].size;
+
+ if (rgn_top > ram_top)
+ size -= rgn_top - ram_top;
+
+ lmb_add(bd->bi_dram[i].start, size);
+ }
+ }
+}
+
static long lmb_resize_regions(struct alist *lmb_rgn_lst,
unsigned long idx_start,
phys_addr_t base, phys_size_t size)
@@ -696,6 +733,8 @@
return ret;
}
+ lmb_add_memory();
+
return 0;
}