From: Simon Glass <sjg@chromium.org>
Date: Thu, 14 Jan 2021 03:29:43 +0000 (-0700)
Subject: bloblist: Support relocating to a larger space
X-Git-Url: http://git.dujemihanovic.xyz/?a=commitdiff_plain;h=9fe064646d2c9f3914cd5ceae51c34020aa77599;p=u-boot.git

bloblist: Support relocating to a larger space

Typically in TPL/SPL the bloblist is quite small. But U-Boot proper may
want to add a lot more to it, such as ACPI tables.

Add a way to expand the bloblist by relocating it in U-Boot proper, along
with the other relocation activities.

Signed-off-by: Simon Glass <sjg@chromium.org>
---

diff --git a/common/Kconfig b/common/Kconfig
index d8982ba377..45535e3501 100644
--- a/common/Kconfig
+++ b/common/Kconfig
@@ -697,6 +697,16 @@ config BLOBLIST_ADDR
 	  Sets the address of the bloblist, set up by the first part of U-Boot
 	  which runs. Subsequent U-Boot stages typically use the same address.
 
+config BLOBLIST_SIZE_RELOC
+	hex "Size of bloblist after relocation"
+	depends on BLOBLIST
+	default BLOBLIST_SIZE
+	help
+	  Sets the size of the bloblist in bytes after relocation. Since U-Boot
+	  has a lot more memory available then, it is possible to use a larger
+	  size than the one set up by SPL. This bloblist is set up during the
+	  relocation process.
+
 endmenu
 
 source "common/spl/Kconfig"
diff --git a/common/bloblist.c b/common/bloblist.c
index 33b5862380..e32f551e27 100644
--- a/common/bloblist.c
+++ b/common/bloblist.c
@@ -317,6 +317,15 @@ void bloblist_show_list(void)
 	}
 }
 
+void bloblist_reloc(void *to, uint to_size, void *from, uint from_size)
+{
+	struct bloblist_hdr *hdr;
+
+	memcpy(to, from, from_size);
+	hdr = to;
+	hdr->size = to_size;
+}
+
 int bloblist_init(void)
 {
 	bool expected;
@@ -327,6 +336,8 @@ int bloblist_init(void)
 	 * that runs
 	 */
 	expected = !u_boot_first_phase();
+	if (spl_prev_phase() == PHASE_TPL && !IS_ENABLED(CONFIG_TPL_BLOBLIST))
+		expected = false;
 	if (expected)
 		ret = bloblist_check(CONFIG_BLOBLIST_ADDR,
 				     CONFIG_BLOBLIST_SIZE);
diff --git a/common/board_f.c b/common/board_f.c
index ae3001bed1..4327a43a33 100644
--- a/common/board_f.c
+++ b/common/board_f.c
@@ -568,9 +568,10 @@ static int reserve_bloblist(void)
 {
 #ifdef CONFIG_BLOBLIST
 	/* Align to a 4KB boundary for easier reading of addresses */
-	gd->start_addr_sp = ALIGN_DOWN(gd->start_addr_sp - CONFIG_BLOBLIST_SIZE,
-				       0x1000);
-	gd->new_bloblist = map_sysmem(gd->start_addr_sp, CONFIG_BLOBLIST_SIZE);
+	gd->start_addr_sp = ALIGN_DOWN(gd->start_addr_sp -
+				       CONFIG_BLOBLIST_SIZE_RELOC, 0x1000);
+	gd->new_bloblist = map_sysmem(gd->start_addr_sp,
+				      CONFIG_BLOBLIST_SIZE_RELOC);
 #endif
 
 	return 0;
@@ -658,7 +659,8 @@ static int reloc_bloblist(void)
 
 		debug("Copying bloblist from %p to %p, size %x\n",
 		      gd->bloblist, gd->new_bloblist, size);
-		memcpy(gd->new_bloblist, gd->bloblist, size);
+		bloblist_reloc(gd->new_bloblist, CONFIG_BLOBLIST_SIZE_RELOC,
+			       gd->bloblist, size);
 		gd->bloblist = gd->new_bloblist;
 	}
 #endif
diff --git a/include/bloblist.h b/include/bloblist.h
index 8cdce61187..964b974fda 100644
--- a/include/bloblist.h
+++ b/include/bloblist.h
@@ -242,6 +242,16 @@ void bloblist_show_list(void);
  */
 const char *bloblist_tag_name(enum bloblist_tag_t tag);
 
+/**
+ * bloblist_reloc() - Relocate the bloblist and optionally resize it
+ *
+ * @to: Pointer to new bloblist location (must not overlap old location)
+ * @to:size: New size for bloblist (must be larger than from_size)
+ * @from: Pointer to bloblist to relocate
+ * @from_size: Size of bloblist to relocate
+ */
+void bloblist_reloc(void *to, uint to_size, void *from, uint from_size);
+
 /**
  * bloblist_init() - Init the bloblist system with a single bloblist
  *
diff --git a/test/bloblist.c b/test/bloblist.c
index 900299dd68..85a6c39680 100644
--- a/test/bloblist.c
+++ b/test/bloblist.c
@@ -347,6 +347,42 @@ static int bloblist_test_align(struct unit_test_state *uts)
 }
 BLOBLIST_TEST(bloblist_test_align, 0);
 
+/* Test relocation of a bloblist */
+static int bloblist_test_reloc(struct unit_test_state *uts)
+{
+	const uint large_size = TEST_BLOBLIST_SIZE;
+	const uint small_size = 0x20;
+	void *old_ptr, *new_ptr;
+	void *blob1, *blob2;
+	ulong new_addr;
+	ulong new_size;
+
+	ut_assertok(bloblist_new(TEST_ADDR, TEST_BLOBLIST_SIZE, 0));
+	old_ptr = map_sysmem(TEST_ADDR, TEST_BLOBLIST_SIZE);
+
+	/* Add one blob and then one that won't fit */
+	blob1 = bloblist_add(TEST_TAG, small_size, 0);
+	ut_assertnonnull(blob1);
+	blob2 = bloblist_add(TEST_TAG2, large_size, 0);
+	ut_assertnull(blob2);
+
+	/* Relocate the bloblist somewhere else, a bit larger */
+	new_addr = TEST_ADDR + TEST_BLOBLIST_SIZE;
+	new_size = TEST_BLOBLIST_SIZE + 0x100;
+	new_ptr = map_sysmem(new_addr, TEST_BLOBLIST_SIZE);
+	bloblist_reloc(new_ptr, new_size, old_ptr, TEST_BLOBLIST_SIZE);
+	gd->bloblist = new_ptr;
+
+	/* Check the old blob is there and that we can now add the bigger one */
+	ut_assertnonnull(bloblist_find(TEST_TAG, small_size));
+	ut_assertnull(bloblist_find(TEST_TAG2, small_size));
+	blob2 = bloblist_add(TEST_TAG2, large_size, 0);
+	ut_assertnonnull(blob2);
+
+	return 0;
+}
+BLOBLIST_TEST(bloblist_test_reloc, 0);
+
 int do_ut_bloblist(struct cmd_tbl *cmdtp, int flag, int argc,
 		   char *const argv[])
 {