From: Simon Glass sjg@chromium.org
The v0.9 spec provides for an 8-byte header for each blob, with fewer fields. The blob start address should be aligned to the alignment specified by the bloblist header. Update the implementation to match this.
Signed-off-by: Simon Glass sjg@chromium.org Co-developed-by: Raymond Mao raymond.mao@linaro.org Signed-off-by: Raymond Mao raymond.mao@linaro.org --- Changes in v2 - Update the blob start address to align to the alignment required by the bloblist header. - Define the macros of bloblist header size and bloblist record header size as the size of their structures.
common/bloblist.c | 17 +++++++++-------- include/bloblist.h | 33 ++++++++++++++++++++++----------- test/bloblist.c | 16 ++++++++-------- 3 files changed, 39 insertions(+), 27 deletions(-)
diff --git a/common/bloblist.c b/common/bloblist.c index 59a092d4cd..55a7e1f591 100644 --- a/common/bloblist.c +++ b/common/bloblist.c @@ -85,12 +85,14 @@ static struct bloblist_rec *bloblist_first_blob(struct bloblist_hdr *hdr)
static inline uint rec_hdr_size(struct bloblist_rec *rec) { - return rec->hdr_size; + return (rec->tag_and_hdr_size & BLOBLISTR_HDR_SIZE_MASK) >> + BLOBLISTR_HDR_SIZE_SHIFT; }
static inline uint rec_tag(struct bloblist_rec *rec) { - return rec->tag; + return (rec->tag_and_hdr_size & BLOBLISTR_TAG_MASK) >> + BLOBLISTR_TAG_SHIFT; }
static ulong bloblist_blob_end_ofs(struct bloblist_hdr *hdr, @@ -99,7 +101,7 @@ static ulong bloblist_blob_end_ofs(struct bloblist_hdr *hdr, ulong offset;
offset = (void *)rec - (void *)hdr; - offset += rec_hdr_size(rec) + ALIGN(rec->size, BLOBLIST_ALIGN); + offset += rec_hdr_size(rec) + ALIGN(rec->size, 1 << hdr->align_log2);
return offset; } @@ -143,7 +145,7 @@ static int bloblist_addrec(uint tag, int size, int align_log2, int data_start, aligned_start, new_alloced;
if (!align_log2) - align_log2 = BLOBLIST_ALIGN_LOG2; + align_log2 = BLOBLIST_BLOB_ALIGN_LOG2;
/* Figure out where the new data will start */ data_start = map_to_sysmem(hdr) + hdr->alloced + sizeof(*rec); @@ -176,8 +178,7 @@ static int bloblist_addrec(uint tag, int size, int align_log2, } rec = (void *)hdr + hdr->alloced;
- rec->tag = tag; - rec->hdr_size = sizeof(struct bloblist_rec); + rec->tag_and_hdr_size = tag | sizeof(*rec) << BLOBLISTR_HDR_SIZE_SHIFT; rec->size = size;
/* Zero the record data */ @@ -281,8 +282,8 @@ static int bloblist_resize_rec(struct bloblist_hdr *hdr, int new_alloced; /* New value for @hdr->alloced */ ulong next_ofs; /* Offset of the record after @rec */
- expand_by = ALIGN(new_size - rec->size, BLOBLIST_ALIGN); - new_alloced = ALIGN(hdr->alloced + expand_by, BLOBLIST_ALIGN); + expand_by = ALIGN(new_size - rec->size, BLOBLIST_BLOB_ALIGN); + new_alloced = ALIGN(hdr->alloced + expand_by, BLOBLIST_BLOB_ALIGN); if (new_size < 0) { log_debug("Attempt to shrink blob size below 0 (%x)\n", new_size); diff --git a/include/bloblist.h b/include/bloblist.h index ab7a7fc299..745bcdd227 100644 --- a/include/bloblist.h +++ b/include/bloblist.h @@ -24,11 +24,11 @@ * which would add to code size. For Thumb-2 the code size needed in SPL is * approximately 940 bytes (e.g. for chromebook_bob). * - * 5. Bloblist uses 16-byte alignment internally and is designed to start on a - * 16-byte boundary. Its headers are multiples of 16 bytes. This makes it easier - * to deal with data structures which need this level of alignment, such as ACPI - * tables. For use in SPL and TPL the alignment can be relaxed, since it can be - * relocated to an aligned address in U-Boot proper. + * 5. Bloblist uses 8-byte alignment internally and is designed to start on a + * 8-byte boundary. Its headers are 8 bytes long. It is possible to achieve + * larger alignment (e.g. 16 bytes) by adding a dummy header, For use in SPL and + * TPL the alignment can be relaxed, since it can be relocated to an aligned + * address in U-Boot proper. * * 6. Bloblist is designed to be passed to Linux as reserved memory. While linux * doesn't understand the bloblist header, it can be passed the indivdual blobs. @@ -77,6 +77,9 @@ enum { BLOBLIST_VERSION = 1, BLOBLIST_MAGIC = 0x6ed0ff,
+ BLOBLIST_BLOB_ALIGN_LOG2 = 3, + BLOBLIST_BLOB_ALIGN = 1 << BLOBLIST_BLOB_ALIGN_LOG2, + BLOBLIST_ALIGN_LOG2 = 3, BLOBLIST_ALIGN = 1 << BLOBLIST_ALIGN_LOG2, }; @@ -195,17 +198,25 @@ struct bloblist_hdr { * * NOTE: Only exported for testing purposes. Do not use this struct. * - * @tag: Tag indicating what the record contains - * @hdr_size: Size of this header, normally sizeof(struct bloblist_rec). The - * record's data starts at this offset from the start of the record + * @tag_and_hdr_size: Tag indicating what the record contains (bottom 24 bits), and + * size of this header (top 8 bits), normally sizeof(struct bloblist_rec). + * The record's data starts at this offset from the start of the record * @size: Size of record in bytes, excluding the header size. This does not * need to be aligned (e.g. 3 is OK). */ struct bloblist_rec { - u32 tag; - u32 hdr_size; + u32 tag_and_hdr_size; u32 size; - u32 _spare; +}; + +enum { + BLOBLISTR_TAG_SHIFT = 0, + BLOBLISTR_TAG_MASK = 0xffffffU << BLOBLISTR_TAG_SHIFT, + BLOBLISTR_HDR_SIZE_SHIFT = 24, + BLOBLISTR_HDR_SIZE_MASK = 0xffU << BLOBLISTR_HDR_SIZE_SHIFT, + + BLOBLIST_HDR_SIZE = sizeof(struct bloblist_hdr), + BLOBLIST_REC_HDR_SIZE = sizeof(struct bloblist_rec), };
/** diff --git a/test/bloblist.c b/test/bloblist.c index 32256be772..7e65f30518 100644 --- a/test/bloblist.c +++ b/test/bloblist.c @@ -261,8 +261,8 @@ static int bloblist_test_cmd_info(struct unit_test_state *uts) run_command("bloblist info", 0); ut_assert_nextline("base: %lx", (ulong)map_to_sysmem(hdr)); ut_assert_nextline("size: 400 1 KiB"); - ut_assert_nextline("alloced: 70 112 Bytes"); - ut_assert_nextline("free: 390 912 Bytes"); + ut_assert_nextline("alloced: 58 88 Bytes"); + ut_assert_nextline("free: 3a8 936 Bytes"); ut_assert_console_end(); ut_unsilence_console(uts);
@@ -320,12 +320,12 @@ static int bloblist_test_align(struct unit_test_state *uts) data = bloblist_add(i, size, 0); ut_assertnonnull(data); addr = map_to_sysmem(data); - ut_asserteq(0, addr & (BLOBLIST_ALIGN - 1)); + ut_asserteq(0, addr & (BLOBLIST_BLOB_ALIGN - 1));
/* Only the bytes in the blob data should be zeroed */ for (j = 0; j < size; j++) ut_asserteq(0, data[j]); - for (; j < BLOBLIST_ALIGN; j++) + for (; j < BLOBLIST_BLOB_ALIGN; j++) ut_asserteq(ERASE_BYTE, data[j]); }
@@ -340,7 +340,7 @@ static int bloblist_test_align(struct unit_test_state *uts) }
/* Check alignment with an bloblist starting on a smaller alignment */ - hdr = map_sysmem(TEST_ADDR + BLOBLIST_ALIGN, TEST_BLOBLIST_SIZE); + hdr = map_sysmem(TEST_ADDR + BLOBLIST_BLOB_ALIGN, TEST_BLOBLIST_SIZE); memset(hdr, ERASE_BYTE, TEST_BLOBLIST_SIZE); memset(hdr, '\0', sizeof(*hdr)); ut_assertok(bloblist_new(TEST_ADDR + BLOBLIST_ALIGN, @@ -349,7 +349,7 @@ static int bloblist_test_align(struct unit_test_state *uts) data = bloblist_add(1, 5, BLOBLIST_ALIGN_LOG2 + 1); ut_assertnonnull(data); addr = map_to_sysmem(data); - ut_asserteq(0, addr & (BLOBLIST_ALIGN * 2 - 1)); + ut_asserteq(0, addr & (BLOBLIST_BLOB_ALIGN * 2 - 1));
return 0; } @@ -437,7 +437,7 @@ static int bloblist_test_grow(struct unit_test_state *uts) hdr = ptr; ut_asserteq(sizeof(struct bloblist_hdr) + sizeof(struct bloblist_rec) * 2 + small_size * 2 + - BLOBLIST_ALIGN, + BLOBLIST_BLOB_ALIGN, hdr->alloced);
return 0; @@ -572,7 +572,7 @@ static int bloblist_test_resize_last(struct unit_test_state *uts) ut_asserteq((u8)ERASE_BYTE, *((u8 *)hdr + alloced_val + 4));
/* Check that the new top of the allocated blobs has not been touched */ - alloced_val += BLOBLIST_ALIGN; + alloced_val += BLOBLIST_BLOB_ALIGN; ut_asserteq(alloced_val, hdr->alloced); ut_asserteq((u8)ERASE_BYTE, *((u8 *)hdr + hdr->alloced));