Board:emulation/spike-riscv

SPIKE is RISC-V's primary emulator. The Spike support in coreboot is maintained by Ron Minnich and jn.

Build instructions

These instructions may easily become out of date as coreboot or RISC-V moves forward. If that happens, please complain on the discussion page or IRC (or just fix it).

Building the toolchain

• clone the coreboot git repository
• download and apply the following patches:
  • 14604: buildgcc: Update to GCC 6.1.0, and binutils riscv update (version 11).
• run make crossgcc-riscv and a have a cup of $BEVERAGE

Building spike

• download Spike from https://github.com/riscv/riscv-isa-sim
• download and apply this patch that implements an 8250 UART
• TODO: fesvr: patch device_list_t::handle_command to ignore HTIF writes
• Edit riscv/processor.cc, processor_t::get_csr(), and add "case CSR_TIME: return 0;"
• run make

Building Linux

• git clone https://github.com/riscv/riscv-linux
• download linux 4.6.x from kernel.org
• cd linux-4.6.x/arch; ln -s ../../riscv-linux/arch/riscv .
• make ARCH=riscv defconfig
• make ARCH=riscv menuconfig, configure General setup/Cross-compiler tool prefix
• make ARCH=riscv

Building coreboot

• select Emulation/Spike ucb riscv
• in the Payload menu of menuconfig, select "ELF Payload" and enter the path to the vmlinux binary
• run make and the make-spike-elf.sh script as described above

For general spike usage, look at its GitHub page.

Boot log

Boot log of coreboot/linux booting. I included bash in the initrd.

�

coreboot-4.5-320-g2e525bf Fri Nov 18 13:29:36 UTC 2016 bootblock starting...
CBFS @ 20100 size 7dff00
CBFS: 'Master Header Locator' located CBFS at [20100:800000)
CBFS: Locating 'fallback/romstage'
CBFS: Found @ offset 80 size 3013
�

coreboot-4.5-320-g2e525bf Fri Nov 18 13:29:36 UTC 2016 romstage starting...
0x40000000 bytes of memory at 0x80000000
CBFS @ 20100 size 7dff00
CBFS: 'Master Header Locator' located CBFS at [20100:800000)
CBFS: Locating 'fallback/ramstage'
CBFS: Found @ offset 3100 size 5403
�

coreboot-4.5-320-g2e525bf Fri Nov 18 13:29:36 UTC 2016 ramstage starting...
BS: Entering BS_PRE_DEVICE state.
BS: Exiting BS_PRE_DEVICE state.
----------------------------------------
BS: Entering BS_DEV_INIT_CHIPS state.
BS: Exiting BS_DEV_INIT_CHIPS state.
----------------------------------------
BS: Entering BS_DEV_ENUMERATE state.
Enumerating buses...
Show all devs... Before device enumeration.
Root Device: enabled 1
CPU_CLUSTER: 0: enabled 1
I2C: 00:06: enabled 1
Compare with tree...
Root Device: enabled 1
 CPU_CLUSTER: 0: enabled 1
 I2C: 00:06: enabled 1
CBMEM:
IMD: root @ 00000000bffff000 254 entries.
IMD: root @ 00000000bfffec00 62 entries.
Root Device scanning...
root_dev_scan_bus for Root Device
CPU_CLUSTER: 0 enabled
I2C: 00:06 enabled
root_dev_scan_bus for Root Device done
scan_bus: scanning of bus Root Device took 0 usecs
done
BS: Exiting BS_DEV_ENUMERATE state.
----------------------------------------
BS: Entering BS_DEV_RESOURCES state.
Allocating resources...
Reading resources...
Root Device read_resources bus 0 link: 0
CPU_CLUSTER: 0 missing read_resources
I2C: 00:06 missing read_resources
Root Device read_resources bus 0 link: 0 done
Done reading resources.
Show resources in subtree (Root Device)...After reading.
 Root Device child on link 0 CPU_CLUSTER: 0
 Root Device resource base 80000000 size 40000000 align 0 gran 0 limit 0 flags e0004200 index 0
  CPU_CLUSTER: 0
  I2C: 00:06
Setting resources...
Root Device assign_resources, bus 0 link: 0
Root Device assign_resources, bus 0 link: 0
Done setting resources.
Show resources in subtree (Root Device)...After assigning values.
 Root Device child on link 0 CPU_CLUSTER: 0
 Root Device resource base 80000000 size 40000000 align 0 gran 0 limit 0 flags e0004200 index 0
  CPU_CLUSTER: 0
  I2C: 00:06
Done allocating resources.
BS: Exiting BS_DEV_RESOURCES state.
----------------------------------------
BS: Entering BS_DEV_ENABLE state.
Enabling resources...
done.
BS: Exiting BS_DEV_ENABLE state.
----------------------------------------
BS: Entering BS_DEV_INIT state.
Initializing devices...
Root Device init ...
Devices initialized
Show all devs... After init.
Root Device: enabled 1
CPU_CLUSTER: 0: enabled 1
I2C: 00:06: enabled 1
BS: Exiting BS_DEV_INIT state.
BS: callback (000000008083e308) @ src/vboot/bootmode.c:68.
----------------------------------------
BS: Entering BS_POST_DEVICE state.
Finalize devices...
Devices finalized
BS: Exiting BS_POST_DEVICE state.
----------------------------------------
BS: Entering BS_OS_RESUME_CHECK state.
BS: Exiting BS_OS_RESUME_CHECK state.
----------------------------------------
BS: Entering BS_WRITE_TABLES state.
Writing coreboot table at 0xbffdc000
 0. 0000000080000000-00000000bffdbfff: RAM
 1. 00000000bffdc000-00000000bfffffff: CONFIGURATION TABLES
CBFS @ 20100 size 7dff00
CBFS: 'Master Header Locator' located CBFS at [20100:800000)
FMAP: Found "FLASH" version 1.1 at 20000.
FMAP: base = 0 size = 800000 #areas = 4
Wrote coreboot table at: 00000000bffdc000, 0x150 bytes, checksum d4c8
coreboot table: 360 bytes.
IMD ROOT    0. 00000000bffff000 00001000
IMD SMALL   1. 00000000bfffe000 00001000
CONSOLE     2. 00000000bffde000 00020000
COREBOOT    3. 00000000bffdc000 00002000
IMD small region:
  IMD ROOT    0. 00000000bfffec00 00000400
BS: Exiting BS_WRITE_TABLES state.
----------------------------------------
BS: Entering BS_PAYLOAD_LOAD state.
CBFS @ 20100 size 7dff00
CBFS: 'Master Header Locator' located CBFS at [20100:800000)
CBFS: Locating 'fallback/payload'
CBFS: Found @ offset 8900 size 34081c
Loading segment from ROM address 0x0000000080028a38
  code (compression=0)
  New segment dstaddr 0x81000000 memsize 0x300000 srcaddr 0x80028a8c filesize 0x2ffa78
Loading segment from ROM address 0x0000000080028a54
  data (compression=0)
  New segment dstaddr 0x81300000 memsize 0x40d50 srcaddr 0x80328504 filesize 0x40d50
Loading segment from ROM address 0x0000000080028a70
  Entry Point 0xffffffff81000000
Loading Segment: addr: 0x0000000081000000 memsz: 0x0000000000300000 filesz: 0x00000000002ffa78
lb: [0x0000000080832000, 0x0000000080847170)
Post relocation: addr: 0x0000000081000000 memsz: 0x0000000000300000 filesz: 0x00000000002ffa78
it's not compressed!
[ 0x81000000, 812ffa78, 0x81300000) <- 80028a8c
Clearing Segment: addr: 0x00000000812ffa78 memsz: 0x0000000000000588
dest 0000000081000000, end 0000000081300000, bouncebuffer ffffffffffffffff
Loading Segment: addr: 0x0000000081300000 memsz: 0x0000000000040d50 filesz: 0x0000000000040d50
lb: [0x0000000080832000, 0x0000000080847170)
Post relocation: addr: 0x0000000081300000 memsz: 0x0000000000040d50 filesz: 0x0000000000040d50
it's not compressed!
[ 0x81300000, 81340d50, 0x81340d50) <- 80328504
dest 0000000081300000, end 0000000081340d50, bouncebuffer ffffffffffffffff
Loaded segments
BS: Exiting BS_PAYLOAD_LOAD state.
----------------------------------------
BS: Entering BS_PAYLOAD_BOOT state.
Jumping to boot code at ffffffff81000000(00000000bffdc000)
Stack overrun on CPU0 (address 0000000080800000 overwritten). Increase stack from current 4096 bytes
ERROR: BUG ENCOUNTERED at file 'src/lib/stack.c', line 40
Config string: 'platform {
  vendor ucb;
  arch spike;
};
rtc {
  addr 0x40000000;
};
uart {
  addr 0x40001000;
};
ram {
  0 {
    addr 0x80000000;
    size 0x40000000;
  };
};
core {
  0 {
    0 {
      isa rv64imafdc;
      timecmp 0x40000008;
      ipi 0x40002000;
    };
  };
};
'
-----------------------------
Virtual memory status enabled
-----------------------------
Initializing virtual memory...
Finished initializing virtual memory
OK, let's go
Getting hart id...
[    0.000000] Linux version 4.6.3-riscv-g1ef29a9 (jn@latitude) (gcc version 6.1.0 (coreboot toolchain v1.44 October 3nd, 2016) ) #144 Fri Nov 25 02:18:13 CET 2016
[    0.000000] bootconsole [early0] enabled
Querying memory, CPU #0...
[    0.000000] Available physical memory: 1008MB
[    0.000000] Initial ramdisk at: 0xffffffff81013758 (1415600 bytes)
[    0.000000] Zone ranges:
[    0.000000]   Normal   [mem 0x0000000081000000-0x00000000bfffffff]
[    0.000000] Movable zone start for each node
[    0.000000] Early memory node ranges
[    0.000000]   node   0: [mem 0x0000000081000000-0x00000000bfffffff]
[    0.000000] Initmem setup node 0 [mem 0x0000000081000000-0x00000000bfffffff]
[    0.000000] Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 254520
[    0.000000] Kernel command line: earlyprintk=sbi_console0 keep init=/bin/sh
[    0.000000] PID hash table entries: 4096 (order: 3, 32768 bytes)
[    0.000000] Dentry cache hash table entries: 131072 (order: 8, 1048576 bytes)
[    0.000000] Inode-cache hash table entries: 65536 (order: 7, 524288 bytes)
[    0.000000] Sorting __ex_table...
[    0.000000] Memory: 1013124K/1032192K available (1317K kernel code, 77K rwdata, 288K rodata, 1464K init, 180K bss, 19068K reserved, 0K cma-reserved)
[    0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[    0.000000] NR_IRQS:0 nr_irqs:0 0
[    0.000000] clocksource: riscv_clocksource: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 1911260446 ns
Setting timer to 0000000000989680 (current time is 0000000000000000)...
mcall_set_timer is currently not implemented, ignoring
[    0.000000] Calibrating delay loop (skipped), value calculated using timer frequency.. 2000.00 BogoMIPS (lpj=10000000)
[    0.000000] pid_max: default: 32768 minimum: 301
[    0.000000] Mount-cache hash table entries: 2048 (order: 2, 16384 bytes)
[    0.000000] Mountpoint-cache hash table entries: 2048 (order: 2, 16384 bytes)
[    0.000000] devtmpfs: initialized
[    0.000000] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[    0.000000] clocksource: Switched to clocksource riscv_clocksource
[    0.000000] Trying to unpack rootfs image as initramfs...
[    0.000000] console [sbi_console0] enabled
[    0.000000] console [sbi_console0] enabled
[    0.000000] bootconsole [early0] disabled
[    0.000000] bootconsole [early0] disabled
[    0.000000] futex hash table entries: 256 (order: 0, 6144 bytes)
[    0.000000] io scheduler noop registered
[    0.000000] io scheduler cfq registered (default)
[    0.000000] brd: module loaded
[    0.000000] Freeing unused kernel memory: 1464K (ffffffff81000000 - ffffffff8116e000)
[    0.000000] This architecture does not have kernel memory protection.
init: cannot set terminal process group (-1): Inappropriate ioctl for device
init: no job control in this shell
init-4.3#