[Qemu-discuss] Where are local APIC addresses in QEMU?

[Tu Do 2]

Hi list,

I'm doing some LAPIC programing.

According to Intel's document, FEE0 0000H to FEE0 03F0H is the range of 
local APIC. However, examining it from QEMU console, I can only find the 
value 0 there:

    (qemu) x/128b 0xfee00000
    fee00000: 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
    fee00008: 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
    fee00010: 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
    fee00018: 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
    fee00020: 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
    fee00028: 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
    fee00030: 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
    fee00038: 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
    fee00040: 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
    fee00048: 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
    fee00050: 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
    fee00058: 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
    fee00060: 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
    fee00068: 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
    fee00070: 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
    fee00078: 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00

I checked 128 bytes to see if anything different than 0. At least, FEE0 
0030H should contain a different value since it is where APIC version is in.

Only protected mode is enabled; paging is disabled, so there's no 
virtual memory:

    (qemu) info mem
    PG disabled


But, `info lapic` command reports actual initial values:

(qemu) info lapic
dumping local APIC state for CPU 0

LVT0     0x00008700 active-hi level                             ExtINT (vec 0)
LVT1     0x00008400 active-hi level                             NMI
LVTPC    0x00010000 active-hi edge  masked                      Fixed  (vec 0)
LVTERR	 0x00010000 active-hi edge  masked                      Fixed 
(vec 0)
LVTTHMR	 0x00010000 active-hi edge  masked                      Fixed 
(vec 0)
LVTT     0x00010000 active-hi edge  masked         one-shot     Fixed  (vec 0)
Timer    DCR=0x0 (divide by 2) initial_count = 0
SPIV     0x000001ff APIC enabled, focus=off, spurious vec 255
ICR      0x000c4610 physical edge assert all
ICR2     0x00000000
ESR      0x00000000
ISR      (none)
IRR      (none)

APR 0x00 TPR 0x00 DFR 0x0f LDR 0x00 PPR 0x00

So, where are these values?

Thanks.