boot_fdt_add_mem_rsv_regions() adds reserved memory sections to an lmb struct. Currently, it only parses regions described by /memreserve/ entries.
Extend this to the more commonly used scheme of the "reserved-memory" node.
Signed-off-by: Simon Goldschmidt simon.k.r.goldschmidt@gmail.com ---
Changes in v2: - this patch is new in v2
common/image-fdt.c | 52 +++++++++++++++++++++++++++++++++++++++------- 1 file changed, 44 insertions(+), 8 deletions(-)
diff --git a/common/image-fdt.c b/common/image-fdt.c index 95748f0ae1..65984c3c98 100644 --- a/common/image-fdt.c +++ b/common/image-fdt.c @@ -10,6 +10,7 @@
#include <common.h> #include <fdt_support.h> +#include <fdtdec.h> #include <errno.h> #include <image.h> #include <linux/libfdt.h> @@ -67,30 +68,65 @@ static const image_header_t *image_get_fdt(ulong fdt_addr) } #endif
+static void boot_fdt_reserve_region(struct lmb *lmb, uint64_t addr, + uint64_t size) +{ + int ret; + + ret = lmb_reserve(lmb, addr, size); + if (!ret) + debug(" reserving fdt memory region: addr=%llx size=%llx\n", + (unsigned long long)addr, (unsigned long long)size); + else + puts("ERROR: reserving fdt memory region failed "); + printf("(addr=%llx size=%llx)\n", + (unsigned long long)addr, (unsigned long long)size); +} + /** - * boot_fdt_add_mem_rsv_regions - Mark the memreserve sections as unusable + * boot_fdt_add_mem_rsv_regions - Mark the memreserve and reserved-memory + * sections as unusable * @lmb: pointer to lmb handle, will be used for memory mgmt * @fdt_blob: pointer to fdt blob base address * - * Adds the memreserve regions in the dtb to the lmb block. Adding the - * memreserve regions prevents u-boot from using them to store the initrd - * or the fdt blob. + * Adds the and reserved-memorymemreserve regions in the dtb to the lmb block. + * Adding the memreserve regions prevents u-boot from using them to store the + * initrd or the fdt blob. */ void boot_fdt_add_mem_rsv_regions(struct lmb *lmb, void *fdt_blob) { uint64_t addr, size; - int i, total; + int i, total, ret; + int nodeoffset, subnode; + struct fdt_resource res;
if (fdt_check_header(fdt_blob) != 0) return;
+ /* process memreserve sections */ total = fdt_num_mem_rsv(fdt_blob); for (i = 0; i < total; i++) { if (fdt_get_mem_rsv(fdt_blob, i, &addr, &size) != 0) continue; - printf(" reserving fdt memory region: addr=%llx size=%llx\n", - (unsigned long long)addr, (unsigned long long)size); - lmb_reserve(lmb, addr, size); + boot_fdt_reserve_region(lmb, addr, size); + } + + /* process reserved-memory */ + nodeoffset = fdt_subnode_offset(fdt_blob, 0, "reserved-memory"); + if (nodeoffset >= 0) { + subnode = fdt_first_subnode(fdt_blob, nodeoffset); + while (subnode >= 0) { + /* check if this subnode has a reg property */ + ret = fdt_get_resource(fdt_blob, subnode, "reg", 0, + &res); + if (!ret) { + addr = res.start; + size = res.end - res.start + 1; + boot_fdt_reserve_region(lmb, addr, size); + } + + subnode = fdt_next_subnode(fdt_blob, subnode); + } } }