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The trap may be entered with dependency checking disabled. Wait for dependency counters and save/restore scheduling mode. v2: Use ttmp1 instead of ttmp11. ttmp11 is not zero-initialized. While the trap handler does zero this field before use, a user-mode second-level trap handler could not rely on this being zero when using an older kernel mode driver. v3: Use ttmp11 primarily but copy to ttmp1 before jumping to the second level trap handler. ttmp1 is inspectable by a debugger. Unexpected bits in the unused space may regress existing software. Signed-off-by: Jay Cornwall <jay.cornwall@amd.com> Reviewed-by: Lancelot Six <lancelot.six@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>