[U-Boot] [PATCH] tools: zynqmpbif: Add support for load=after

[Alexander Graf]

Some times it's handy to have a partition loaded immediately after
the end of the previous blob. The most obvious example for this is
a U-Boot binary (coming from .elf) and a device tree file.

This patch adds that logic. With this, the following bif snippet
does what you would expect:

  [destination_cpu=a5x-0, exception_level=el-2] u-boot.elf
  [load=after] u-boot.dtb

converts to

  FSBL payload on CPU a5x-0 (PS):
    Offset     : 0x00590500
    Size       : 577768 (0x8d0e8) bytes
    Load       : 0x08000000
    Attributes : EL2
    Checksum   : 0xefca2cad
  FSBL payload on CPU none (PS):
    Offset     : 0x0061d640
    Size       : 129760 (0x1fae0) bytes
    Load       : 0x0808d0e8 (entry=0x00000000)
    Attributes : EL3
    Checksum   : 0xf7dd3d49

Signed-off-by: Alexander Graf <agraf at suse.de>
---
 tools/zynqmpbif.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/tools/zynqmpbif.c b/tools/zynqmpbif.c
index 6c8f66055d..47c233c15f 100644
--- a/tools/zynqmpbif.c
+++ b/tools/zynqmpbif.c
@@ -42,6 +42,7 @@ enum bif_flag {
 	BIF_FLAG_PUF_FILE,
 	BIF_FLAG_AARCH32,
 	BIF_FLAG_PART_OWNER_UBOOT,
+	BIF_FLAG_LOAD_AFTER,
 
 	/* Internal flags */
 	BIF_FLAG_BIT_FILE,
@@ -151,6 +152,11 @@ static char *parse_load(char *line, struct bif_entry *bf)
 {
 	char *endptr;
 
+	if (!strncmp(line, "after", strlen("after"))) {
+		bf->flags |= (1ULL << BIF_FLAG_LOAD_AFTER);
+		return line + strlen("after");
+	}
+
 	bf->load = strtoll(line, &endptr, 0);
 
 	return endptr;
@@ -336,6 +342,15 @@ static int bif_add_part(struct bif_entry *bf, const char *data, size_t len)
 	if (r)
 		return r;
 
+	if (bf->flags & (1ULL << BIF_FLAG_LOAD_AFTER) &&
+	    bif_output.last_part) {
+		struct partition_header *p = bif_output.last_part;
+		uint64_t load = le64_to_cpu(p->load_address);
+
+		load += le32_to_cpu(p->len) * 4;
+		parthdr.load_address = cpu_to_le64(load);
+	}
+
 	parthdr.offset = cpu_to_le32(bf->offset / 4);
 
 	if (bf->flags & (1ULL << BIF_FLAG_BOOTLOADER)) {
-- 
2.12.3