nRF53 XIP Bus Fault

Question

I'm attempting to evaluate XIP (NCS 3.0.0) on the nRF53 with a mx25u256 flash chip.
I'm placing a simple test function in external flash:

#define XIP_TEST_INC (100)

int xip_test_function(const int input)

{

return (input + XIP_TEST_INC);

}

The project builds successfully and I can see the data is flashed at the expected location in the flash chip.

Fullscreen qspi_mem_rd.txt Download

nrfjprog --config ./cam_app/nrfjprog_camelot_qspi.toml -f NRF53 --memrd 0x10120000 --n 2000

0x10120000: 96F3B83D 00000000 00000200 00000004   |=...............|
0x10120010: 00000000 00000B00 00000000 00000000   |................|
0x10120020: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF   |................|
0x10120030: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF   |................|
0x10120040: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF   |................|
0x10120050: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF   |................|
0x10120060: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF   |................|
0x10120070: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF   |................|
0x10120080: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF   |................|
0x10120090: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF   |................|
0x101200A0: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF   |................|
0x101200B0: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF   |................|
0x101200C0: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF   |................|
0x101200D0: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF   |................|
0x101200E0: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF   |................|
0x101200F0: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF   |................|
0x10120100: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF   |................|
0x10120110: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF   |................|
0x10120120: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF   |................|
0x10120130: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF   |................|
0x10120140: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF   |................|
0x10120150: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF   |................|
0x10120160: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF   |................|
0x10120170: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF   |................|
0x10120180: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF   |................|
0x10120190: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF   |................|
0x101201A0: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF   |................|
0x101201B0: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF   |................|
0x101201C0: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF   |................|
0x101201D0: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF   |................|
0x101201E0: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF   |................|
0x101201F0: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF   |................|
0x10120200: 47703064 01506907 00200010 3682920F   |d0pG.iP... ....6|
0x10120210: E7674EFC BAAD3700 C9FBA940 CC0150D7   |[email protected]..|
0x10120220: B91F524B 690FCC17 C2C3D6A6 00200001   |KR.....i...... .|
0x10120230: DC0157FC 32E13561 C4BD4738 E5D2040F   |.W..a5.28G......|
0x10120240: 3B83E5BE 939FC223 01003D59 9499FA8C   |...;#...Y=......|
0x10120250: 01000020 113F1B8A FDA85FC9 D5FF1478   | .....?.._..x...|
0x10120260: BB4212ED 9361DA98 85C9E7EE 7946A416   |..B...a.......Fy|
0x10120270: 55987789 8BEA41A6 2473EE88 9AED911C   |.w.U.A....s$....|
0x10120280: 88546E70 DCF1D938 F1518171 29E09A27   |pnT.8...q.Q.'..)|
0x10120290: 29BA2229 20FC5EA1 DAFA6ACB 74516855   |)".).^. .j..UhQt|
0x101202A0: 637E64BE 1B617729 FD841CAD 5458A7C1   |.d~c)wa.......XT|
0x101202B0: C4C5FE65 AE53F495 9544123D A4A428DD   |e.....S.=.D..(..|
0x101202C0: 37FD55E9 E2F336A2 E3BB84D3 CA373DCC   |.U.7.6.......=7.|
0x101202D0: F176F20D 6085716C EA2F786F AAA460B7   |..v.lq.`ox/..`..|
0x101202E0: C753CA5D DD0A79E4 8B3EE8ED 1AC622E6   |].S..y....>.."..|
0x101202F0: 789CC8EC C5FF355B 5CE0E584 C6B61C12   |...x[5.....\....|
0x10120300: 69A0B574 2643414E FF3951E8 28169802   |t..iNAC&.Q9....(|
0x10120310: 12A1C1F4 816AEA66 EB4F0D67 32673F2D   |....f.j.g.O.-?g2|
0x10120320: FCC7B820 0407C411 65F57740 8FDE309E   | [email protected]..|
0x10120330: FDC10876 8DD54F02 9D731FBC 335E80D9   |v....O....s...^3|
0x10120340: A47B6E2E 7ED1F2F0 ACE61291 14E568C4   |.n{....~.....h..|
0x10120350: 27F89959 FFFFFFFF FFFFFFFF FFFFFFFF   |Y..'............|
0x10120360: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF   |................|

The chip is connected to QSPI as follows:

psels = <NRF_PSEL(QSPI_SCK, 0, 17)>,

<NRF_PSEL(QSPI_IO0, 0, 13)>,

<NRF_PSEL(QSPI_IO1, 0, 14)>,

<NRF_PSEL(QSPI_IO2, 0, 15)>,
<NRF_PSEL(QSPI_IO3, 0, 16)>,

<NRF_PSEL(QSPI_CSN, 0, 18)>;

When the code runs and the XIP function is executed, I receive a bus fault.

It appears that it is attempting to execute the code in external flash, based on the address.

And here is an excerpt from the .map file:

0x0000000010120200 . = ALIGN (0x4)

*xip_test.c.obj(SORT_BY_ALIGNMENT(.text.xip_test_function))

.text.xip_test_function

0x0000000010120200 0x4 app/libapp.a(xip_test.c.obj)

0x0000000010120200 xip_test_function

0x0000000010120204 . = ALIGN (0x4)

0x0000000010120204 __extflash_text_reloc_end = .

0x0000000010120200 __extflash_text_reloc_start = ADDR (.extflash_text_reloc)

0x0000000000000004 __extflash_text_reloc_size = (__extflash_text_reloc_end - __extflash_text_reloc_start)

0x0000000010120200 __extflash_text_rom_start = LOADADDR (.extflash_text_reloc)

0x0000000020002000 _ram_mpu_ro_region_start = ORIGIN (RAM)

0x0000000010120204 _ram_mpu_ro_region_end = .

text 0x0000000000010358 0x37d48

0x0000000000010358 __text_region_start = .

I was using the extxip_smp_svr sample as a guide.
Perhaps I have missed something in the configuration?
Any suggestions?