Hi people, Needed some help in running u-boot on qemu emulating Raspberry pi 2. I came across qemu supporting emulation of Raspbeerry pi 2 (raspi2 machine in qemu). I thought of giving it a try by running u-boot compiled for Raspberry pi 2. I used the config "rpi_2_defconfig" to build u-boot.

following is the command I used to invoke QEMU qemu-system-arm -M raspi2 -kernel u-boot

i see the following message on the serial console of qemu

U-Boot 2017.03-01088-gd0ffda8-dirty (Apr 27 2017 - 09:21:24 +0530)

DRAM: 960 MiB RPI 2 Model B (0xa21041) MMC: bcm2835_sdhci: 0

And it never goes past this point and I never get the u-boot console.

I tried debugging through gdb.

this is the back trace of the stack #0 timer_get_us () at lib/time.c:124 #1 0x3bf643d4 in bcm2835_sdhci_raw_writel (reg=44, val=16777216, host=0x3bb3d3e8) at drivers/mmc/bcm2835_sdhci.c:74 #2 bcm2835_sdhci_writeb (host=0x3bb3d3e8, val=<optimized out>, reg=<optimized out>) at drivers/mmc/bcm2835_sdhci.c:117 #3 0x3bf63270 in sdhci_writeb (reg=47, val=val@entry=1 '\001', host=host@entry=0x3bb3d3e8) at include/sdhci.h:285 #4 sdhci_reset (host=host@entry=0x3bb3d3e8, mask=mask@entry=1 '\001') at drivers/mmc/sdhci.c:29 #5 0x3bf63308 in sdhci_init (mmc=0x3bb3d460) at drivers/mmc/sdhci.c:481 #6 0x3bf62b48 in mmc_start_init (mmc=0x3bb3d460) at drivers/mmc/mmc.c:1673 #7 0x3bf62d90 in mmc_init (mmc=mmc@entry=0x3bb3d460) at drivers/mmc/mmc.c:1746 #8 0x3bf610b4 in mmc_get_dev (dev=<optimized out>, descp=0x3bb38ccc) at drivers/mmc/mmc_legacy.c:221 #9 0x3bf602c8 in blk_get_devnum_by_typename (if_typename=if_typename@entry=0x3bf89bc5 "mmc", devnum=devnum@entry=0) at drivers/block/blk_legacy.c:205 #10 0x3bf5ce48 in get_dev_hwpart (hwpart=0, dev=0, ifname=0x3bf89bc5 "mmc") at disk/part.c:48 #11 blk_get_device_by_str (ifname=ifname@entry=0x3bf89bc5 "mmc", dev_hwpart_str=dev_hwpart_str@entry=0x3bb3d5c0 "0", dev_desc=0x3bb38dc4, dev_desc@entry=0x3bf5cf78 <blk_get_device_part_str+176>) at disk/part.c:367 #12 0x3bf5cf78 in blk_get_device_part_str (ifname=ifname@entry=0x3bf89bc5 "mmc", dev_part_str=dev_part_str@entry=0x3bf854c1 "0:1", dev_desc=0x3bf5cf78 <blk_get_device_part_str+176>, dev_desc@entry=0x3bb38dbc, info=0x3bb38dc8, info@entry=0x3bb38dc0, allow_whole_dev=allow_whole_dev@entry=1) at disk/part.c:475 #13 0x3bf51db4 in env_relocate_spec () at common/env_fat.c:85 #14 0x3bf578a0 in env_relocate () at common/env_common.c:268 #15 0x3bf501c4 in initr_env () at common/board_r.c:479 #16 0x3bf71144 in initcall_run_list (init_sequence=init_sequence@entry=0x3bf8ecd8) at lib/initcall.c:31 #17 0x3bf50314 in board_init_r (new_gd=<optimized out>, dest_addr=<optimized out>) at common/board_r.c:947 #18 0x3bf41710 in _main () at arch/arm/lib/crt0.S:153 #19 0x3bf41710 in _main () at arch/arm/lib/crt0.S:153

Could somebody help me in further debugging?

QEMU version: 2.8

Regards, Pradeep M C