#5182 closed bug (fixed)
[PATCH] boot_loader_openfirmware: Fix second kernel argument
| Reported by: | andreasf | Owned by: | axeld |
|---|---|---|---|
| Priority: | blocker | Milestone: | R1 |
| Component: | System/Boot Loader | Version: | R1/Development |
| Keywords: | Cc: | kallisti5 | |
| Blocked By: | Blocking: | #1048 | |
| Platform: | PowerPC |
Description
The kernel's entry function _start expects as second argument an int currentCPU.
The boot loader didn't initialize GPR4, passing its second argument, the kernel entry address, as CPU number, causing smp_cpu_rendezvous to loop forever.
The attached patch initializes it to zero for now.
Attachments (1)
Change History (5)
by , 15 years ago
| Attachment: | kernel_arg_cpu.diff added |
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comment:1 by , 15 years ago
works great, tested on G3 Lombard. With the patch above we finally get to the kernel debug prompt on real hardware.
comment:2 by , 15 years ago
| Resolution: | → fixed |
|---|---|
| Status: | new → closed |
Applied in hrev34854. Thanks a lot!
comment:3 by , 15 years ago
After commiting it, I just thought one could add a TODO to the code where the CPU index is fixed to 0. It should eventually be adjusted to pass the actual index on an SMP system.
comment:4 by , 15 years ago
Thanks for getting on top of this stippi. Your right, a todo might be good there.. we need to throughly comment any workarounds for PPC to make sure their meaning doesn't get lost.
proposed patch