Add bloblist_check_reg_conv() to check whether the bloblist is compliant to the register conventions defined in Firmware Handoff specification. This API can be used for all Arm platforms.

Signed-off-by: Raymond Mao raymond.mao@linaro.org --- Changes in v2 - Refactor of bloblist_check_reg_conv(). Changes in v3 - bloblist_check_reg_conv() returns -ENOENT if OF_BOARD is disabled. Changes in v4 - Add checking of signature register. Changes in V5 - Drop the dependence on OF_BOARD.

common/bloblist.c | 11 +++++++++++ include/bloblist.h | 20 ++++++++++++++++++++ 2 files changed, 31 insertions(+)

diff --git a/common/bloblist.c b/common/bloblist.c index 2d373910b6..980b1ddbcb 100644 --- a/common/bloblist.c +++ b/common/bloblist.c @@ -542,3 +542,14 @@ int bloblist_maybe_init(void)

return 0; } + +int bloblist_check_reg_conv(ulong rfdt, ulong rzero, ulong rsig) +{ + if (rzero || rsig != (BLOBLIST_MAGIC | BLOBLIST_REGCONV_VER) || + rfdt != (ulong)bloblist_find(BLOBLISTT_CONTROL_FDT, 0)) { + gd->bloblist = NULL; /* Reset the gd bloblist pointer */ + return -EIO; + } + + return 0; +} diff --git a/include/bloblist.h b/include/bloblist.h index 84fc943819..f7e800f681 100644 --- a/include/bloblist.h +++ b/include/bloblist.h @@ -78,6 +78,13 @@ enum { BLOBLIST_VERSION = 1, BLOBLIST_MAGIC = 0x4a0fb10b,

+ /* + * FIXME: + * Register convention version should be placed into a higher byte + * https://github.com/FirmwareHandoff/firmware_handoff/issues/32 + */ + BLOBLIST_REGCONV_VER = 1 << 24, + BLOBLIST_BLOB_ALIGN_LOG2 = 3, BLOBLIST_BLOB_ALIGN = 1 << BLOBLIST_BLOB_ALIGN_LOG2,

@@ -461,4 +468,17 @@ static inline int bloblist_maybe_init(void) } #endif /* BLOBLIST */

+/** + * bloblist_check_reg_conv() - Check whether the bloblist is compliant to + * the register conventions according to the + * Firmware Handoff spec. + * + * @rfdt: Register that holds the FDT base address. + * @rzero: Register that must be zero. + * @rsig: Register that holds signature and register conventions version. + * Return: 0 if OK, -EIO if the bloblist is not compliant to the register + * conventions. + */ +int bloblist_check_reg_conv(ulong rfdt, ulong rzero, ulong rsig); + #endif /* __BLOBLIST_H */

The current bloblist pointer and size can be retrieved from global data, so we don't need to pass them from the function arguments. This change also help to remove all external access of gd->bloblist outside of bloblist module.

Signed-off-by: Raymond Mao raymond.mao@linaro.org --- Changes in v2 - New patch file created for v2. Changes in v3 - Check the space size before copying the bloblist. - Add return code of bloblist_reloc(). Changes in v4 - return error code from bloblist_reloc().

common/bloblist.c | 10 ++++++++-- common/board_f.c | 9 +++------ include/bloblist.h | 8 ++++---- test/bloblist.c | 6 ++---- 4 files changed, 17 insertions(+), 16 deletions(-)

diff --git a/common/bloblist.c b/common/bloblist.c index 26b0ba33b1..c2fd07575f 100644 --- a/common/bloblist.c +++ b/common/bloblist.c @@ -472,13 +472,19 @@ void bloblist_show_list(void) } }

-void bloblist_reloc(void *to, uint to_size, void *from, uint from_size) +int bloblist_reloc(void *to, uint to_size) { struct bloblist_hdr *hdr;

- memcpy(to, from, from_size); + if (to_size < gd->bloblist->total_size) + return -ENOSPC; + + memcpy(to, gd->bloblist, gd->bloblist->total_size); hdr = to; hdr->total_size = to_size; + gd->bloblist = to; + + return 0; }

int bloblist_init(void) diff --git a/common/board_f.c b/common/board_f.c index d4d7d01f8f..f4145a2698 100644 --- a/common/board_f.c +++ b/common/board_f.c @@ -676,13 +676,10 @@ static int reloc_bloblist(void) return 0; } if (gd->new_bloblist) { - int size = CONFIG_BLOBLIST_SIZE; - debug("Copying bloblist from %p to %p, size %x\n", - gd->bloblist, gd->new_bloblist, size); - bloblist_reloc(gd->new_bloblist, CONFIG_BLOBLIST_SIZE_RELOC, - gd->bloblist, size); - gd->bloblist = gd->new_bloblist; + gd->bloblist, gd->new_bloblist, gd->bloblist->total_size); + return bloblist_reloc(gd->new_bloblist, + CONFIG_BLOBLIST_SIZE_RELOC); } #endif

diff --git a/include/bloblist.h b/include/bloblist.h index cc78259e5a..0ae079d62a 100644 --- a/include/bloblist.h +++ b/include/bloblist.h @@ -426,11 +426,11 @@ 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 + * @to_size: New size for bloblist + * Return: 0 if OK, -ENOSPC if the new size is small than the bloblist total + * size. */ -void bloblist_reloc(void *to, uint to_size, void *from, uint from_size); +int bloblist_reloc(void *to, uint to_size);

/** * bloblist_init() - Init the bloblist system with a single bloblist diff --git a/test/bloblist.c b/test/bloblist.c index 7dab9addf8..1c60bbac36 100644 --- a/test/bloblist.c +++ b/test/bloblist.c @@ -376,13 +376,12 @@ 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 *new_ptr; void *blob1, *blob2; ulong new_addr; ulong new_size;

ut_assertok(bloblist_new(TEST_ADDR, TEST_BLOBLIST_SIZE, 0, 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); @@ -394,8 +393,7 @@ static int bloblist_test_reloc(struct unit_test_state *uts) 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; + ut_assertok(bloblist_reloc(new_ptr, new_size));

/* Check the old blob is there and that we can now add the bigger one */ ut_assertnonnull(bloblist_find(TEST_TAG, small_size));

Save boot arguments x[0-3] into an array for handover of bloblist from previous boot stage.

Signed-off-by: Raymond Mao raymond.mao@linaro.org --- Changes in v2 - New patch file created for v2. Changes in V5 - Drop the dependence on OF_BOARD.

arch/arm/cpu/armv8/start.S | 14 ++++++++++++++ 1 file changed, 14 insertions(+)

diff --git a/arch/arm/cpu/armv8/start.S b/arch/arm/cpu/armv8/start.S index 6cc1d26e5e..91cdd03947 100644 --- a/arch/arm/cpu/armv8/start.S +++ b/arch/arm/cpu/armv8/start.S @@ -370,5 +370,19 @@ ENTRY(c_runtime_cpu_setup) ENDPROC(c_runtime_cpu_setup)

WEAK(save_boot_params) +#if (IS_ENABLED(CONFIG_BLOBLIST)) + adr x9, saved_args + stp x0, x1, [x9] + /* Increment the address by 16 bytes for the next pair of values */ + stp x2, x3, [x9, #16] +#endif b save_boot_params_ret /* back to my caller */ ENDPROC(save_boot_params) + +.section .data +.global saved_args +saved_args: + .rept 4 + .xword 0 + .endr +END(saved_args)

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 --- Changes in v4 - Add weak default function. - Add comments for BLOBLIST_ALLOC. - Add local debug macro. - Refine the commit message. Changes in V5 - Drop the dependence on OF_BOARD. - Remove local debug macro.

common/bloblist.c | 62 ++++++++++++++++++++++++++++++++-------------- include/bloblist.h | 10 ++++++++ 2 files changed, 54 insertions(+), 18 deletions(-)

diff --git a/common/bloblist.c b/common/bloblist.c index c2fd07575f..ad06d7a179 100644 --- a/common/bloblist.c +++ b/common/bloblist.c @@ -487,37 +487,57 @@ int bloblist_reloc(void *to, uint to_size) 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 @@ int bloblist_init(void) 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 @@ int bloblist_init(void) return log_msg_ret("ini", ret); gd->flags |= GD_FLG_BLOBLIST_READY;

+#ifdef DEBUG + bloblist_show_stats(); + bloblist_show_list(); +#endif + return 0; }

diff --git a/include/bloblist.h b/include/bloblist.h index 0ae079d62a..7fbdd622bc 100644 --- a/include/bloblist.h +++ b/include/bloblist.h @@ -482,4 +482,14 @@ static inline int bloblist_maybe_init(void) */ int bloblist_check_reg_conv(ulong rfdt, ulong rzero, ulong rsig);

+/** + * xferlist_from_boot_arg() - Get bloblist from the boot args and relocate it + * to the specified address. + * + * @addr: Address for the bloblist + * @size: Size of space reserved for the bloblist + * Return: 0 if OK, else on error + */ +int xferlist_from_boot_arg(ulong addr, ulong size); + #endif /* __BLOBLIST_H */