I want to test AXI_CDMA driver of linux, and do like
this Link:
http://www.wiki.xilinx.com/DMA+Drivers+-+Soft+IPs
Step1:
config the kernel:
CONFIG_XILINX_AXICDMA=Y
CONFIG_XILINX_CDMATEST=Y
Step2:
add device in zynq_zed.dts
axi_cdma_0: axicdma@40030000 {
compatible = "xlnx,axi-cdma";
reg = < 0x40030000 0x10000 >;
dma-channel@40030000 {
interrupts = < 0 59 4 >;
xlnx,datawidth = <0x40>;
xlnx,device-id = <0x0>;
} ;
} ;
and then conpile kernel, the boot message :
Starting kernel ...
Uncompressing Linux... done, booting the kernel.
Booting Linux on physical CPU 0x0
Linux version 3.12.0-xilinx-dirty (root@ubuntu) (gcc version 4.7.3 (Sourcery CodeBench Lite 2013.05-40) ) #158 SMP PREEMPT Mon Jan 26 18:43:01 PST 2015
CPU: ARMv7 Processor [413fc090] revision 0 (ARMv7), cr=18c5387d
CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
Machine: Xilinx Zynq Platform, model: Xilinx Zynq
bootconsole [earlycon0] enabled
Memory policy: Data cache writealloc
PERCPU: Embedded 8 pages/cpu @c09ef000 s8384 r8192 d16192 u32768
Built 1 zonelists in Zone order, mobility grouping on. Total pages: 121856
Kernel command line: console=ttyPS0,115200 root=/dev/ram rw earlyprintk
PID hash table entries: 2048 (order: 1, 8192 bytes)
Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)
Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)
Memory: 476800K/491520K available (4106K kernel code, 246K rwdata, 1304K rodata, 176K init, 175K bss, 14720K reserved, 0K highmem)
Virtual kernel memory layout:
vector : 0xffff0000 - 0xffff1000 ( 4 kB)
fixmap : 0xfff00000 - 0xfffe0000 ( 896 kB)
vmalloc : 0xe0800000 - 0xff000000 ( 488 MB)
lowmem : 0xc0000000 - 0xe0000000 ( 512 MB)
pkmap : 0xbfe00000 - 0xc0000000 ( 2 MB)
modules : 0xbf000000 - 0xbfe00000 ( 14 MB)
.text : 0xc0008000 - 0xc0550c58 (5412 kB)
.init : 0xc0551000 - 0xc057d0c0 ( 177 kB)
.data : 0xc057e000 - 0xc05bbbc8 ( 247 kB)
.bss : 0xc05bbbd4 - 0xc05e79e8 ( 176 kB)
Preemptible hierarchical RCU implementation.
Dump stacks of tasks blocking RCU-preempt GP.
RCU restricting CPUs from NR_CPUS=4 to nr_cpu_ids=2.
NR_IRQS:16 nr_irqs:16 16
ps7-slcr mapped to e0802000
Zynq clock init
sched_clock: 16 bits at 54kHz, resolution 18432ns, wraps every 1207ms
ps7-ttc #0 at e0804000, irq=43
Console: colour dummy device 80x30
Calibrating delay loop... 1332.01 BogoMIPS (lpj=6660096)
pid_max: default: 32768 minimum: 301
Mount-cache hash table entries: 512
CPU: Testing write buffer coherency: ok
CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
Setting up static identity map for 0xc03e2ac0 - 0xc03e2b18
L310 cache controller enabled
l2x0: 8 ways, CACHE_ID 0x410000c8, AUX_CTRL 0x72360000, Cache size: 512 kB
CPU1: Booted secondary processor
CPU1: thread -1, cpu 1, socket 0, mpidr 80000001
Brought up 2 CPUs
SMP: Total of 2 processors activated.
CPU: All CPU(s) started in SVC mode.
devtmpfs: initialized
VFP support v0.3: implementor 41 architecture 3 part 30 variant 9 rev 4
NET: Registered protocol family 16
DMA: preallocated 256 KiB pool for atomic coherent allocations
zynq_gpio e000a000.ps7-gpio: gpio at 0xe000a000 mapped to 0xe0850000
hw-breakpoint: found 5 (+1 reserved) breakpoint and 1 watchpoint registers.
hw-breakpoint: maximum watchpoint size is 4 bytes.
zynq_ocm f800c000.ps7-ocmc: ZYNQ OCM pool: 256 KiB @ 0xe0880000
bio: create slab <bio-0> at 0
SCSI subsystem initialized
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
pps_core: LinuxPPS API ver. 1 registered
pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>
PTP clock support registered
EDAC MC: Ver: 3.0.0
Switched to clocksource ttc_clocksource
NET: Registered protocol family 2
TCP established hash table entries: 4096 (order: 3, 32768 bytes)
TCP bind hash table entries: 4096 (order: 3, 32768 bytes)
TCP: Hash tables configured (established 4096 bind 4096)
TCP: reno registered
UDP hash table entries: 256 (order: 1, 8192 bytes)
UDP-Lite hash table entries: 256 (order: 1, 8192 bytes)
NET: Registered protocol family 1
RPC: Registered named UNIX socket transport module.
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
RPC: Registered tcp NFSv4.1 backchannel transport module.
Trying to unpack rootfs image as initramfs...
rootfs image is not initramfs (no cpio magic); looks like an initrd
Freeing initrd memory: 4296K (df71f000 - dfb51000)
hw perfevents: enabled with ARMv7 Cortex-A9 PMU driver, 7 counters available
jffs2: version 2.2. (NAND) (SUMMARY) ?? 2001-2006 Red Hat, Inc.
msgmni has been set to 939
io scheduler noop registered
io scheduler deadline registered
io scheduler cfq registered (default)
dma-pl330 f8003000.ps7-dma: unable to set the seg size
dma-pl330 f8003000.ps7-dma: Loaded driver for PL330 DMAC-2364208
dma-pl330 f8003000.ps7-dma: DBUFF-128x8bytes Num_Chans-8 Num_Peri-4 Num_Events-16
---- xilinx_cdma_probe start!----
And the linux system freezes!!!
What's wrong please?
