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kvisc/vm/dv/CPUDEV

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# The OS/K Team licenses this file to you under the MIT license.
# See the LICENSE file in the project root for more information.
CPU device function slots:
slot ax0 ax1 ax2 thr name desc
0-15 - - - - (reserved) (reserved)
16 - - - - getmaxidx rax = maximal index for a register frame
17 - - - - getrfusage rax = number of register frames active
18 - - - - getcuridx rax = index of the current register frame
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19 - - - - leastavail rax = least index among inactive frames, -1 if none
20 i - - - isactive rax = is register frame #ax0 active?
21 i - - y activate activates register frame #ax0 (filling it with 0's)
22 i - - y deactivate deactivates register frame #ax0 (losing all its contents!)
23 i i - y copyframe copy contents of frame #ax1 into (active) frame #ax0
24 i i - y moveframe move frame #ax1 to (inactive) frame index #ax0
25-31 - - - - (reserved) (reserved)
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32 i - - - loadargs load registers ax0-ax7 from frame #ax0
33 i r - - loadreg rax = register #ax1 from frame #ax0
34-47 - - - - (reserved) (reserved)
48 i r i y storereg store ax2 into register #ax1 from frame #ax0
49-63 - - - - (reserved) (reserved)
64 i i - y idtadd mark interrupt #ax0 as handled by register frame #ax1
65 i - - y idtdel mark interrupt #ax0 as unhandled
66 i - - - idtquery rax = interrupt #ax0 handled? rdx = index of handling frame
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67+ - - - - (reserved) (reserved)
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Arguments:
i immediate
r register index (0=inv, 1=rip, etc...)