Re: [Qemu-arm] [Qemu devel v8 PATCH 0/5] Add support for Smartfusion2 SoC

[Alistair Francis]

On Wed, Sep 13, 2017 at 9:10 PM, Philippe Mathieu-Daudé <address@hidden> wrote:
> On 09/08/2017 04:24 AM, sundeep subbaraya wrote:
>>
>> Hi Phillipe,
>>
>> On Fri, Sep 8, 2017 at 3:14 AM, Philippe Mathieu-Daudé <address@hidden
>> <mailto:address@hidden>> wrote:
>>
>>     Hi Subbaraya,
>>
>>     very good work!
>>
>>     On 09/07/2017 04:24 PM, Subbaraya Sundeep wrote:
>>
>>         Hi Qemu-devel,
>>
>>         I am trying to add Smartfusion2 SoC.
>>         SoC is from Microsemi and System on Module(SOM)
>>         board is from Emcraft systems. Smartfusion2 has hardened
>>         Microcontroller(Cortex-M3)based Sub System and FPGA fabric.
>>         At the moment only system timer, sysreg and SPI
>>         controller are modelled.
>>
>>         Testing:
>>         ./arm-softmmu/qemu-system-arm -M smartfusion2-som -serial
>>         mon:stdio \
>>         -kernel u-boot.bin -display none -drive
>>         file=spi.bin,if=mtd,format=raw
>>
>>
>>     "-M emcraft-sf2" ;)
>>
>>
>> copy/paste error :)
>>
>>
>>     U-Boot 2010.03-00147-g7da5092 (Jul 03 2017 - 09:04:50)
>>
>>     CPU  : SmartFusion2 SoC (Cortex-M3 Hard IP)
>>     Freqs: CORTEX-M3=142MHz,PCLK0=71MHz,PCLK1=71MHz
>>     Board: M2S-FG484-SOM Rev 1A, www.emcraft.com <http://www.emcraft.com>
>>
>>     DRAM:  64 MB
>>     *** Warning - bad CRC, using default environment
>>
>>     In:    serial
>>     Out:   serial
>>     Err:   serial
>>     Net:   M2S_MAC
>>     Hit any key to stop autoboot:  0
>>     16384 KiB S25FL128P_64K at 0:0 is now current device
>>     ## Booting kernel from Legacy Image at a0007fc0 ...
>>         Image Name:   dtskernel
>>         Image Type:   ARM Linux Kernel Image (uncompressed)
>>         Data Size:    2664224 Bytes =  2.5 MB
>>         Load Address: a0008000
>>         Entry Point:  a0008001
>>         Verifying Checksum ... OK
>>         Loading Kernel Image ... OK
>>     OK
>>
>>     Starting kernel ...
>>
>>     NVIC: Bad read offset 0xd74
>>     [    0.000000] Booting Linux on physical CPU 0x0
>>     [    0.000000] Linux version 4.5.0-00001-g3aa90e8-dirty
>>     (address@hidden) (gcc version 5.4.0 (GCC) ) #102
>>     PREEMPT Tue May 16 19:43:40 IST 2017
>>     [    0.000000] CPU: ARMv7-M [410fc231] revision 1 (ARMv7M),
>> cr=00000000
>>     [    0.000000] CPU: unknown data cache, unknown instruction cache
>>     [    0.000000] Machine model: Microsemi SmartFusion 2 development
>> board
>>     [    0.000000] Kernel command line: console=ttyS0,115200n8 panic=10
>>     address@hidden earlyprintk
>>     [    0.000000] Memory: 62204K/65536K available (1472K kernel code,
>>     73K rwdata, 652K rodata, 400K init, 120K bss, 3332K reserved, 0K
>>     cma-reserved)
>>     [    0.000000] NR_IRQS:16 nr_irqs:16 16
>>     [    0.001178] sched_clock: 32 bits at 83MHz, resolution 12ns, wraps
>>     every 25873297401ns
>>     [    0.003085] clocksource: msf2_clocksource: mask: 0xffffffff
>>     max_cycles: 0xffffffff, max_idle_ns: 23027234290 ns
>>     [    0.009732] timer at 40004000, irq=16
>>     [    0.014475] Calibrating delay loop... 442.36 BogoMIPS (lpj=2211840)
>>     [    0.653685] Serial: 8250/16550 driver, 1 ports, IRQ sharing
>> disabled
>>     [    0.690789] console [ttyS0] disabled
>>     [    0.696659] 40000000.serial: ttyS0 at MMIO 0x40000000 (irq = 17,
>>     base_baud = 5187500) is a 16550
>>     [    0.702725] console [ttyS0] enabled
>>     [    0.826251] Freeing unused kernel memory: 400K (a021c000 -
>> a0280000)
>>     init started: BusyBox v1.24.1 (2017-05-15 09:57:00 IST)
>>     ~ #
>>
>>     (qemu) info mtree
>>     address-space: cpu-memory
>>        0000000000000000-ffffffffffffffff (prio 0, i/o): armv7m-container
>>          0000000000000000-ffffffffffffffff (prio -1, i/o): system
>>            0000000000000000-000000000003ffff (prio 0, i/o): alias
>>     MSF2.eNVM.alias @MSF2.eNVM 0000000000000000-000000000003ffff
>>            0000000020000000-000000002000ffff (prio 0, ram): MSF2.eSRAM
>>            0000000040000000-000000004000001f (prio 0, i/o): serial
>>            0000000040001000-000000004000103f (prio 0, i/o): mss-spi
>>            0000000040004000-000000004000402f (prio 0, i/o): mss-timer
>>            0000000040011000-000000004001103f (prio 0, i/o): mss-spi
>>            0000000040038000-00000000400382ff (prio 0, i/o): msf2-sysreg
>>            0000000060000000-000000006003ffff (prio 0, rom): MSF2.eNVM
>>            00000000a0000000-00000000a3ffffff (prio 0, ram): ddr-ram
>>          0000000022000000-0000000023ffffff (prio 0, i/o): bitband
>>          0000000042000000-0000000043ffffff (prio 0, i/o): bitband
>>          00000000e000e000-00000000e000efff (prio 0, i/o): nvic
>>            00000000e000e000-00000000e000efff (prio 0, i/o): nvic_sysregs
>>            00000000e000e010-00000000e000e0ef (prio 1, i/o): systick
>>
>>     (qemu) info qtree
>>     bus: main-system-bus
>>        type System
>>        dev: msf2-soc, id ""
>>          part-name = "M2S010"
>>          eNVM-size = 262144 (0x40000)
>>          eSRAM-size = 65536 (0x10000)
>>          m3clk = 142000000 (0x876bf80)
>>          apb0div = 2 (0x2)
>>          apb1div = 2 (0x2)
>>        dev: mss-spi, id ""
>>          gpio-out "sysbus-irq" 2
>>          mmio 0000000040011000/0000000000000040
>>          bus: spi
>>            type SSI
>>        dev: mss-spi, id ""
>>          gpio-out "sysbus-irq" 2
>>          mmio 0000000040001000/0000000000000040
>>          bus: spi
>>            type SSI
>>            dev: s25sl12801, id ""
>>              gpio-in "ssi-gpio-cs" 1
>>              nonvolatile-cfg = 36863 (0x8fff)
>>              spansion-cr1nv = 0 (0x0)
>>              spansion-cr2nv = 1 (0x1)
>>              spansion-cr3nv = 2 (0x2)
>>              spansion-cr4nv = 16 (0x10)
>>              drive = "mtd0"
>>        dev: mss-timer, id ""
>>          gpio-out "sysbus-irq" 2
>>          clock-frequency = 71000000 (0x43b5fc0)
>>          mmio 0000000040004000/0000000000000030
>>        dev: msf2-sysreg, id ""
>>          apb0divisor = 2 (0x2)
>>          apb1divisor = 2 (0x2)
>>          mmio 0000000040038000/0000000000000300
>>
>>     So far:
>>     Tested-by: Philippe Mathieu-Daudé <address@hidden
>>     <mailto:address@hidden>>
>>
>>
>> Thanks for testing.
>>
>>
>>     Just some comments (no need to fix):
>>
>>
>> Thank you, I will look into these errors once the patchset gets into the
>> tree.
>>
>>
>>     M2S-FG484-SOM> reset
>>     resetting ...
>>     M2S-FG484-SOM>
>>
>>     Hmm no reset, I was expecting some unimp/guest-error warning.
>>
>>     M2S-FG484-SOM> tftpboot
>>     m2s_eth_init: FIFO initialization timeout
>>     *** m2s_mac_dump_regs FIFO init:
>>       DMA TX CTRL=00000000;DESC=00000000;STAT=00000000
>>       DMA RX CTRL=00000000;DESC=00000000;STAT=00000000
>>       DMA IRQ 00000000/00000000
>>       CFG1=00000000;CFG2=00000000;IFG=00000000;HD=00000000;MFL=00000000
>>       IFCTRL=00000000;IFSTAT=00000000;ADR1=00000000;ADR2=00000000
>>       FIFO CFG 00000000/00000000/00000000/00000000/00000000/00000000/
>>       FIFO ACC
>>
>> 00000000/00000000/00000000/00000000/00000000/00000000/00000000/00000000/
>>
>>     (same unimp/guest-error warning)
>>
>> If device is not implemented how do I print warning when guest access that
>> device?
>
>
> in hw/arm/msf2-soc.c:
>
>     create_unimplemented_device("emac",  0x40041000, 0x1000);
>
> and while here:
>
>     create_unimplemented_device("i2c_0", 0x40002000, 0x1000);
>     create_unimplemented_device("i2c_1", 0x40012000, 0x1000);
>     create_unimplemented_device("rtc",   0x40017000, 0x1000);
>     create_unimplemented_device("usb",   0x40043000, 0x1000);
>
> Then you'll see unimp access running "qemu-system-arm -d unimp"
>
> This can be another patch although.

Once you have all the devices there you can enable bus access errors
as well. That's a future patch set though.

Thanks,
Alistair

>
> Regards,
>
> Phil.