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author | Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com> | 2019-01-15 00:38:17 +0300 |
---|---|---|
committer | Tom Rini <trini@konsulko.com> | 2019-01-17 00:37:03 +0300 |
commit | e2237a2c263783996a85b70ccbf1f967aa2ec182 (patch) | |
tree | ddd6e89a683ac6b2d2249f18086449eb8356e640 | |
parent | 0f7c51a676ca73f7950a7e4f9d8454e57324270c (diff) | |
download | u-boot-e2237a2c263783996a85b70ccbf1f967aa2ec182.tar.xz |
fdt: parse "reserved-memory" for memory reservation
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>
Reviewed-by: Simon Glass <sjg@chromium.org>
-rw-r--r-- | common/image-fdt.c | 53 | ||||
-rw-r--r-- | lib/Makefile | 1 |
2 files changed, 46 insertions, 8 deletions
diff --git a/common/image-fdt.c b/common/image-fdt.c index 8ee5a13352..5988808f18 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 +68,66 @@ 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); + } } } diff --git a/lib/Makefile b/lib/Makefile index f06d6316d4..f5de4a851b 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -30,6 +30,7 @@ obj-y += crc7.o obj-y += crc8.o obj-y += crc16.o obj-$(CONFIG_ERRNO_STR) += errno_str.o +obj-$(CONFIG_OF_LIBFDT) += fdtdec.o obj-$(CONFIG_FIT) += fdtdec_common.o obj-$(CONFIG_TEST_FDTDEC) += fdtdec_test.o obj-$(CONFIG_GZIP_COMPRESSED) += gzip.o |