Hi Marek,
On 11/12/2016 01:50 PM, Marek Vasut wrote:
On 11/07/2016 08:54 PM, Guenter Roeck wrote:
Hi Marek,
On 11/07/2016 10:14 AM, Marek Vasut wrote:
On 11/07/2016 04:58 AM, Guenter Roeck wrote:
On Tue, Oct 25, 2016 at 09:57:43PM +0200, Marek Vasut wrote:
From: Chris Wulff <crwu...@gmail.com>
Add support for emulating Altera NiosII R1 architecture into qemu.
This patch is based on previous work by Chris Wulff from 2012 and
updated to latest mainline QEMU.
Signed-off-by: Marek Vasut <ma...@denx.de>
Cc: Chris Wulff <crwu...@gmail.com>
Cc: Jeff Da Silva <jdasi...@altera.com>
Cc: Ley Foon Tan <lf...@altera.com>
Cc: Sandra Loosemore <san...@codesourcery.com>
Cc: Yves Vandervennet <yvand...@altera.com>
---
V3: Thorough cleanup, deal with the review comments all over the place
V4: - Use extract32()
- Fix gen_goto_tb() , suppress tcg_gen_goto_tb()
- Clean up gen_check_supervisor() helper
- Use TCGMemOp type for flags
- Drop jump labels from wrctl/rdctl
- More TCG cleanup
V5: - Simplify load/store handling
- Handle loads into R_ZERO from protected page, add comment
V6: - Fix division opcode handling
- Add missing disas handling
- V5 review comments cleanup
---
[ ... ]
diff --git a/target-nios2/cpu.h b/target-nios2/cpu.h
new file mode 100644
index 0000000..17c9a0f
[ ... ]
+static inline void cpu_get_tb_cpu_state(CPUNios2State *env,
target_ulong *pc,
+ target_ulong *cs_base,
uint32_t *flags)
+{
+ *pc = env->regs[R_PC];
+ *cs_base = 0;
+ *flags = (env->regs[CR_STATUS] & (CR_STATUS_EH | CR_STATUS_U));
+}
+
+#endif /* CPU_NIOS2_H */
+
The empty line at the end results in a whitespace message from git.
Dropped, thanks. Is there anything else or is this patchset starting to
become acceptable ?
Hard for me to say. I tried to build and run the series with the latest
linux
kernel (v4.9-rc4), but it is stuck in early boot. I tried with
10m50_defconfig
and 10m50_devboard.dtb. gcc is 6.1.0 built with buildroot, though I also
tried
with toolchains from CodeSourcery. Obviously I have no idea if there is a
kernel bug or a qemu bug or a problem with the command line I used.
Here is my command line:
qemu-system-nios2 -M 10m50-ghrd -kernel vmlinux -dtb 10m50_devboard.dtb \
-append "earlycon=uart8250,mmio32,0x18001600,115200n8 console=ttyS0"
This may be wrong, but the boot is stuck in an endless loop in
mark_bootmem(),
which seems early and odd. I tried with both vmlinux and
arch/nios2/boot/vmImage,
with the same results.
Can you provide a working command line and kernel version, and/or
directions how
to create a working image if I need to run the image, for example, from
u-boot ?
Sorry if that is posted somewhere and I missed it.
I guess Romain gave you something since I see you made some progress.
I'll have to look into that fdt loader issue.
Yes, WFM after
diff --git a/hw/nios2/boot.c b/hw/nios2/boot.c
index 564dbae..e0a9aff 100644
--- a/hw/nios2/boot.c
+++ b/hw/nios2/boot.c
@@ -73,6 +73,11 @@ static void main_cpu_reset(void *opaque)
}
}
+static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
+{
+ return addr - 0xc0000000LL;
+}
+
static int nios2_load_dtb(struct nios2_boot_info bi, const uint32_t ramsize,
const char *kernel_cmdline, const char *dtb_filename)
{
@@ -97,21 +102,16 @@ static int nios2_load_dtb(struct nios2_boot_info bi, const
uint32_t ramsize,
if (bi.initrd_start) {
qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-start",
- bi.initrd_start);
+ translate_kernel_address(NULL, bi.initrd_start));
qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-end",
- bi.initrd_end);
+ translate_kernel_address(NULL, bi.initrd_end));
}
cpu_physical_memory_write(bi.fdt, fdt, fdt_size);
return fdt_size;
}
-static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
-{
- return addr - 0xc0000000LL;
-}
-
void nios2_load_kernel(Nios2CPU *cpu, hwaddr ddr_base,
This is my command line, running your patch series plus the above fixup on top
of
the qemu master branch:
qemu-system-nios2 -M 10m50-ghrd \
-kernel vmlinux -no-reboot \
-dtb 10m50_devboard.dtb \
--append "rdinit=/sbin/init" \
-initrd busybox-nios2.cpio \
-nographic -monitor none
I use 10m50_defconfig with CONFIG_NIOS2_PASS_CMDLINE=y and
CONFIG_BLK_DEV_INITRD=y.
One boot error I get is:
cpu cpu0: Error -2 creating of_node link
but that doesn't seem to have an impact. Also, I see
altera_tse 400.ethernet (unnamed net_device) (uninitialized): MDIO bus
altera_tse-0: created
altera_tse 400.ethernet: Altera TSE MAC version 0.0 at 0x00000400 irq 3/4
altera_tse 400.ethernet eth0: Bad PHY UID 0x00000000
altera_tse 400.ethernet eth0: Cannot attach to PHY (error: -19)
altera_tse 400.ethernet eth0 (unregistered): MDIO bus altera_tse-0: removed
As far as I can see the ethernet controller isn't supported in qemu, so I guess
that
is as expected.
Also, it still gives me
qemu-system-nios2: Trying to execute code outside RAM or ROM at 0xd4000000
on reboot, suggesting something like "rom_add_blob_fixed()" might be useful, if
I knew
what to put there. If there is a means to get a clean reset, please let me know.
Thanks,
Guenter
