bloblist: Load the bloblist from the previous loader
During bloblist initialization, load the bloblist via boot arguments
from the previous loader.
If a valid bloblist exists in boot arguments, relocate it into the
fixed bloblist memory region.
If not, fallback to support BLOBLIST_ADDR or BLOBLIST_ALLOC.
Signed-off-by: Raymond Mao <raymond.mao@linaro.org>
diff --git a/common/bloblist.c b/common/bloblist.c
index c2fd075..ad06d7a 100644
--- a/common/bloblist.c
+++ b/common/bloblist.c
@@ -487,37 +487,57 @@
return 0;
}
+/*
+ * Weak default function for getting bloblist from boot args.
+ */
+int __weak xferlist_from_boot_arg(ulong __always_unused addr,
+ ulong __always_unused size)
+{
+ return -ENOENT;
+}
+
int bloblist_init(void)
{
bool fixed = IS_ENABLED(CONFIG_BLOBLIST_FIXED);
int ret = -ENOENT;
ulong addr, size;
- bool expected;
-
- /**
- * We don't expect to find an existing bloblist in the first phase of
- * U-Boot that runs. Also we have no way to receive the address of an
- * allocated bloblist from a previous stage, so it must be at a fixed
+ /*
+ * If U-Boot is not in the first phase, an existing bloblist must be
+ * at a fixed address.
+ */
+ bool from_addr = fixed && !u_boot_first_phase();
+ /*
+ * If U-Boot is in the first phase that an arch custom routine should
+ * install the bloblist passed from previous loader to this fixed
* address.
*/
- expected = fixed && !u_boot_first_phase();
+ bool from_boot_arg = fixed && u_boot_first_phase();
+
if (spl_prev_phase() == PHASE_TPL && !IS_ENABLED(CONFIG_TPL_BLOBLIST))
- expected = false;
+ from_addr = false;
if (fixed)
addr = IF_ENABLED_INT(CONFIG_BLOBLIST_FIXED,
CONFIG_BLOBLIST_ADDR);
size = CONFIG_BLOBLIST_SIZE;
- if (expected) {
+
+ if (from_boot_arg)
+ ret = xferlist_from_boot_arg(addr, size);
+ else if (from_addr)
ret = bloblist_check(addr, size);
- if (ret) {
- log_warning("Expected bloblist at %lx not found (err=%d)\n",
- addr, ret);
- } else {
- /* Get the real size, if it is not what we expected */
- size = gd->bloblist->total_size;
- }
- }
+
+ if (ret)
+ log_warning("Bloblist at %lx not found (err=%d)\n",
+ addr, ret);
+ else
+ /* Get the real size */
+ size = gd->bloblist->total_size;
+
if (ret) {
+ /*
+ * If we don't have a bloblist from a fixed address, or the one
+ * in the fixed address is not valid. we must allocate the
+ * memory for it now.
+ */
if (CONFIG_IS_ENABLED(BLOBLIST_ALLOC)) {
void *ptr = memalign(BLOBLIST_ALIGN, size);
@@ -525,7 +545,8 @@
return log_msg_ret("alloc", -ENOMEM);
addr = map_to_sysmem(ptr);
} else if (!fixed) {
- return log_msg_ret("!fixed", ret);
+ return log_msg_ret("BLOBLIST_FIXED is not enabled",
+ ret);
}
log_debug("Creating new bloblist size %lx at %lx\n", size,
addr);
@@ -538,6 +559,11 @@
return log_msg_ret("ini", ret);
gd->flags |= GD_FLG_BLOBLIST_READY;
+#ifdef DEBUG
+ bloblist_show_stats();
+ bloblist_show_list();
+#endif
+
return 0;
}