The first bytes are the exception vectors:
CODE:00000000 LDR PC, =0x1000005C
CODE:00000004 ; ---------------------------------------------------------------------------
CODE:00000004 LDR PC, =0x10000044
CODE:00000008 ; ---------------------------------------------------------------------------
CODE:00000008 LDR PC, =0x10000048
CODE:0000000C ; ---------------------------------------------------------------------------
CODE:0000000C LDR PC, =0x1000004C
CODE:00000010 ; ---------------------------------------------------------------------------
CODE:00000010 LDR PC, =0x10000050
CODE:00000010 ; ---------------------------------------------------------------------------
CODE:00000014 ALIGN 8
CODE:00000018 LDR PC, =0x10000054
CODE:0000001C ; ---------------------------------------------------------------------------
CODE:0000001C LDR PC, =0x10000058
CODE:0000001C ; ---------------------------------------------------------------------------
CODE:00000020 off_20 DCD 0x1000005C ; DATA XREF: CODE:00000000↑r
CODE:00000024 off_24 DCD 0x10000044 ; DATA XREF: CODE:00000004↑r
CODE:00000028 off_28 DCD 0x10000048 ; CODE XREF: sub_1D8↓j
CODE:00000028 ; DATA XREF: CODE:00000008↑r ...
CODE:0000002C off_2C DCD 0x1000004C ; DATA XREF: CODE:0000000C↑r
CODE:00000030 off_30 DCD 0x10000050 ; DATA XREF: CODE:00000010↑r
CODE:00000034 off_34 DCD 0x10000054 ; DATA XREF: CODE:00000018↑r
CODE:00000038 off_38 DCD 0x10000058 ; DATA XREF: CODE:0000001C↑r
Apparently the code is mapped at 0x10000000
. After rebasing, we can see that the loops you've found are dummy handlers:
CODE:10000000 LDR PC, =Reset_Handler
CODE:10000004 ; ---------------------------------------------------------------------------
CODE:10000004 LDR PC, =Undef_Hander
CODE:10000008 ; ---------------------------------------------------------------------------
CODE:10000008 LDR PC, =SWI_Handler
CODE:1000000C ; ---------------------------------------------------------------------------
CODE:1000000C LDR PC, =PrefAbort_Handler
CODE:10000010 ; ---------------------------------------------------------------------------
CODE:10000010 LDR PC, =DataAbort_Handler
CODE:10000010 ; ---------------------------------------------------------------------------
CODE:10000014 ALIGN 8
CODE:10000018 LDR PC, =IRQ_Handler
CODE:1000001C ; ---------------------------------------------------------------------------
CODE:1000001C LDR PC, =FIQ_Handler
CODE:1000001C ; ---------------------------------------------------------------------------
CODE:10000020 off_10000020 DCD Reset_Handler ; DATA XREF: CODE:10000000↑r
CODE:10000024 off_10000024 DCD Undef_Hander ; DATA XREF: CODE:10000004↑r
CODE:10000028 off_10000028 DCD SWI_Handler ; DATA XREF: CODE:10000008↑r
CODE:1000002C off_1000002C DCD PrefAbort_Handler ; DATA XREF: CODE:1000000C↑r
CODE:10000030 off_10000030 DCD DataAbort_Handler ; DATA XREF: CODE:10000010↑r
CODE:10000034 off_10000034 DCD IRQ_Handler ; DATA XREF: CODE:10000018↑r
CODE:10000038 off_10000038 DCD FIQ_Handler ; DATA XREF: CODE:1000001C↑r
CODE:1000003C aV10 DCB "v1.0"
CODE:10000040 DCD 0x1C200
CODE:10000044
CODE:10000044 ; =============== S U B R O U T I N E =======================================
CODE:10000044
CODE:10000044 ; Attributes: noreturn
CODE:10000044
CODE:10000044 Undef_Hander ; CODE XREF: CODE:10000004↑j
CODE:10000044 ; Undef_Hander↓j
CODE:10000044 ; DATA XREF: ...
CODE:10000044 B Undef_Hander
CODE:10000044 ; End of function Undef_Hander
CODE:10000044
CODE:10000048
CODE:10000048 ; =============== S U B R O U T I N E =======================================
CODE:10000048
CODE:10000048 ; Attributes: noreturn
CODE:10000048
CODE:10000048 SWI_Handler ; CODE XREF: CODE:10000008↑j
CODE:10000048 ; SWI_Handler↓j
CODE:10000048 ; DATA XREF: ...
CODE:10000048 B SWI_Handler
CODE:10000048 ; End of function SWI_Handler
CODE:10000048
CODE:1000004C
CODE:1000004C ; =============== S U B R O U T I N E =======================================
CODE:1000004C
CODE:1000004C ; Attributes: noreturn
CODE:1000004C
CODE:1000004C PrefAbort_Handler ; CODE XREF: CODE:1000000C↑j
CODE:1000004C ; PrefAbort_Handler↓j
CODE:1000004C ; DATA XREF: ...
CODE:1000004C B PrefAbort_Handler
CODE:1000004C ; End of function PrefAbort_Handler
CODE:1000004C
CODE:10000050
CODE:10000050 ; =============== S U B R O U T I N E =======================================
CODE:10000050
CODE:10000050 ; Attributes: noreturn
CODE:10000050
CODE:10000050 DataAbort_Handler ; CODE XREF: CODE:10000010↑j
CODE:10000050 ; DataAbort_Handler↓j
CODE:10000050 ; DATA XREF: ...
CODE:10000050 B DataAbort_Handler
CODE:10000050 ; End of function DataAbort_Handler
CODE:10000050
CODE:10000054
CODE:10000054 ; =============== S U B R O U T I N E =======================================
CODE:10000054
CODE:10000054 ; Attributes: noreturn
CODE:10000054
CODE:10000054 IRQ_Handler ; CODE XREF: CODE:10000018↑j
CODE:10000054 ; IRQ_Handler↓j
CODE:10000054 ; DATA XREF: ...
CODE:10000054 B IRQ_Handler
CODE:10000054 ; End of function IRQ_Handler
CODE:10000054
CODE:10000058
CODE:10000058 ; =============== S U B R O U T I N E =======================================
CODE:10000058
CODE:10000058 ; Attributes: noreturn
CODE:10000058
CODE:10000058 FIQ_Handler ; CODE XREF: CODE:1000001C↑j
CODE:10000058 ; FIQ_Handler↓j
CODE:10000058 ; DATA XREF: ...
CODE:10000058 B FIQ_Handler
CODE:10000058 ; End of function FIQ_Handler
CODE:10000058
CODE:1000005C ; ---------------------------------------------------------------------------
CODE:1000005C
CODE:1000005C Reset_Handler ; CODE XREF: CODE:10000000↑j
CODE:1000005C ; DATA XREF: CODE:10000000↑o ...
CODE:1000005C MOV R1, #0x12
CODE:10000060 ORR R0, R1, #0
CODE:10000064 MCR p15, 0, R0,c9,c1, 1
CODE:10000068 MOV R1, #0x12
CODE:1000006C ORR R0, R1, #0x100000
CODE:10000070 MCR p15, 0, R0,c9,c1, 0
CODE:10000074 MRC p15, 0, R0,c1,c0, 0
CODE:10000078 ORR R0, R0, #0x50000
CODE:1000007C MCR p15, 0, R0,c1,c0, 0
CODE:10000080 LDR R0, =0x5200F010
CODE:10000084 LDR R1, [R0]
CODE:10000088 ORR R1, R1, #0xE
CODE:1000008C STR R1, [R0]
CODE:10000090 LDR R12, =sub_10000140
CODE:10000094 BX R12 ; sub_10000140
The code in Reset_Handler
performs the very basic hw init then jumps to the code which prepares the rest of the environment (copies code and data to its final location then jumps to it).