Need more memory in cboot!

I need to used more memory(10MB) in cboot with “tegrabl_malloc()”,but it failed:Failed to allocate memory.
So how can i do to get more memory?

I use tegrabl_malloc(4096) to apply 4K memory, and use tegrabl_free to free the memory ,but it seems memory is not enough?

Error log shows below:
[0007.442] I> ########## Fixed storage boot ##########
[0007.447] I> Already published: 00010003
[0007.450] I> Look for boot partition
[0007.454] I> Fallback: assuming 0th partition is boot partition
[0007.460] I> Detect filesystem
[0007.487] I> ---------------image_md5_compare444444444444------------------
[0007.487] I> rootfs path: /sdmmc_user/boot/Image
[0007.506] I> Image len: 34615304, size: 4096
[0007.712]
[0007.713] -----------------------------------------------
[0007.714] Synchronous Exception: DATA ABORT (FAR: 9343fe73d538d093)
[0007.716] -----------------------------------------------
[0007.717] PAR_ELX: 0x809
[0007.718]
[0007.718] ESR 0x96000044: ec 0x25, il 0x1, iss 0x44
[0007.719] -----------------------------------------------
[0007.721] [Stack Trace]
[0007.721]
[0007.722] => pc:0xA06418AC, sp:0xA0EA11E0
[0007.726] => pc:0xA064A7D4, sp:0xA0EA1410
[0007.730] => pc:0xA064177C, sp:0xA0EA1430
[0007.733] => pc:0xA063ED74, sp:0xA0EA15C0
[0007.737] => pc:0xA063F0C8, sp:0xA0EA1620
[0007.741] => pc:0xA060F45C, sp:0xA0EA1690
[0007.745] => pc:0xA060F5F8, sp:0xA0EA1730
[0007.749] => pc:0xA060F60C, sp:0xA0EA17A0
[0007.753] => pc:0xA060F290, sp:0xA0EA17E0
[0007.757] => pc:0xA060E7F0, sp:0xA0EA17F0
[0007.760] => pc:0xA060E7C4, sp:0xA0EA1800
[0007.764] -----------------------------------------------
[0007.769] iframe 0xa0ea10f0:
[0007.772] x0 0x a4abb318 x1 0x a0eb2900 x2 0x9343fe73d538d083 x3 0x9343fe73d538d083
[0007.781] x4 0x 1018 x5 0x 4 x6 0x 4b1bc8e630 x7 0x 4b1bc8e630db
[0007.790] x8 0x a3014314 x9 0x fe2ce6e0 x10 0x 6fa87e4f x11 0x 85845dd1
[0007.799] x12 0x ffeff47d x13 0x 8f0ccc92 x14 0xcb5f12efefff54a5 x15 0xc8d505b8dbc6c867
[0007.809] x16 0x 655b59c3 x17 0xdb9d8dd63c70ab19 x18 0x835a8c3b530b9564 x19 0x a0692000
[0007.818] x20 0x 0 x21 0x b x22 0x a0ea1608 x23 0x 0
[0007.827] x24 0x a0ea1720 x25 0x a0ea1708 x26 0x 0 x27 0x 0
[0007.836] x28 0x a0697708 x29 0x a0ea1410 lr 0x a0641cec sp 0x a0ea11e0
[0007.845] elr 0x a06418ac
[0007.848] spsr 0x 60000209
[0007.851] -----------------------------------------------
[0007.856] panic (caller 0xa0601238): die
[0007.860] HALT: spinning forever…