diff options
| -rw-r--r-- | common/Kconfig | 15 | ||||
| -rw-r--r-- | common/bloblist.c | 16 | ||||
| -rw-r--r-- | common/board_f.c | 8 | ||||
| -rw-r--r-- | doc/develop/bloblist.rst | 16 |
4 files changed, 50 insertions, 5 deletions
diff --git a/common/Kconfig b/common/Kconfig index 176fda9..50ac433 100644 --- a/common/Kconfig +++ b/common/Kconfig @@ -727,6 +727,8 @@ config TPL_BLOBLIST This enables a bloblist in TPL. The bloblist is set up in TPL and passed to SPL and U-Boot proper. +if BLOBLIST + config BLOBLIST_SIZE hex "Size of bloblist" depends on BLOBLIST @@ -737,17 +739,24 @@ config BLOBLIST_SIZE is set up in the first part of U-Boot to run (TPL, SPL or U-Boot proper), and this sane bloblist is used for subsequent stages. +config BLOBLIST_ALLOC + bool "Allocate bloblist" + help + Allocate the bloblist using malloc(). This avoids the need to + specify a fixed address on systems where this is unknown or can + change at runtime. + config BLOBLIST_ADDR hex "Address of bloblist" - depends on BLOBLIST default 0xc000 if SANDBOX help 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. + This is not used if BLOBLIST_ALLOC is selected. + 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 @@ -755,6 +764,8 @@ config BLOBLIST_SIZE_RELOC size than the one set up by SPL. This bloblist is set up during the relocation process. +endif # BLOBLIST + endmenu source "common/spl/Kconfig" diff --git a/common/bloblist.c b/common/bloblist.c index 1290fff..01b0410 100644 --- a/common/bloblist.c +++ b/common/bloblist.c @@ -7,6 +7,7 @@ #include <common.h> #include <bloblist.h> #include <log.h> +#include <malloc.h> #include <mapmem.h> #include <spl.h> #include <asm/global_data.h> @@ -416,10 +417,21 @@ int bloblist_init(void) ret = bloblist_check(CONFIG_BLOBLIST_ADDR, CONFIG_BLOBLIST_SIZE); if (ret) { + ulong addr; + log(LOGC_BLOBLIST, expected ? LOGL_WARNING : LOGL_DEBUG, "Existing bloblist not found: creating new bloblist\n"); - ret = bloblist_new(CONFIG_BLOBLIST_ADDR, CONFIG_BLOBLIST_SIZE, - 0); + if (IS_ENABLED(CONFIG_BLOBLIST_ALLOC)) { + void *ptr = memalign(BLOBLIST_ALIGN, + CONFIG_BLOBLIST_SIZE); + + if (!ptr) + return log_msg_ret("alloc", -ENOMEM); + addr = map_to_sysmem(ptr); + } else { + addr = CONFIG_BLOBLIST_ADDR; + } + ret = bloblist_new(addr, CONFIG_BLOBLIST_SIZE, 0); } else { log(LOGC_BLOBLIST, LOGL_DEBUG, "Found existing bloblist\n"); } diff --git a/common/board_f.c b/common/board_f.c index f7ea7c7..dd69c3b 100644 --- a/common/board_f.c +++ b/common/board_f.c @@ -655,8 +655,14 @@ static int reloc_bootstage(void) static int reloc_bloblist(void) { #ifdef CONFIG_BLOBLIST - if (gd->flags & GD_FLG_SKIP_RELOC) + /* + * Relocate only if we are supposed to send it + */ + if ((gd->flags & GD_FLG_SKIP_RELOC) && + CONFIG_BLOBLIST_SIZE == CONFIG_BLOBLIST_SIZE_RELOC) { + debug("Not relocating bloblist\n"); return 0; + } if (gd->new_bloblist) { int size = CONFIG_BLOBLIST_SIZE; diff --git a/doc/develop/bloblist.rst b/doc/develop/bloblist.rst index 317ebc4..47274cf 100644 --- a/doc/develop/bloblist.rst +++ b/doc/develop/bloblist.rst @@ -59,6 +59,22 @@ Bloblist provides a fairly simple API which allows blobs to be created and found. All access is via the blob's tag. Blob records are zeroed when added. +Placing the bloblist +-------------------- + +The bloblist is typically positioned at a fixed address by TPL, or SPL. This +is controlled by `CONFIG_BLOBLIST_ADDR`. But in some cases it is preferable to +allocate the bloblist in the malloc() space. Use the `CONFIG_BLOBLIST_ALLOC` +option to enable this. + +The bloblist is automatically relocated as part of U-Boot relocation. Sometimes +it is useful to expand the bloblist in U-Boot proper, since it may want to add +information for use by Linux. Note that this does not mean that Linux needs to +know anything about the bloblist format, just that it is convenient to use +bloblist to place things contiguously in memory. Set +`CONFIG_BLOBLIST_SIZE_RELOC` to define the expanded size, if needed. + + Finishing the bloblist ---------------------- |