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;; ;;
;; Copyright (C) KolibriOS team 2004-2013. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License ;;
;; ;;
;; 20/11/2013 yogev_ezra: Initial version ;;
;; Thanks for help to: dunkaist, eAndrew, hidnplayr, Mario ;;
;; ;;
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$Revision: 4261 $
VORTEX86DEBUG = 0 ; For testing in emulators and in non-Vortex86 CPU computers, set this to 1
VORTEX86DEBUGVALUE = 0x35504d44 ; FAKE port output = used for testing
; Detect Vortex86 CPU and generate CPU name in string format (PCI address at 93H~90H in Vortex86 North Bridge contains SoC type)
; Available Vortex86 CPU codes taken from Coreboot project. New codes should be added to "Vortex86SoClist" below
; #define DMP_CPUID_SX 0x31504d44 ("DMP1")
; #define DMP_CPUID_DX 0x32504d44 ("DMP2")
; #define DMP_CPUID_MX 0x33504d44 ("DMP3")
; #define DMP_CPUID_DX2 0x34504d44 ("DMP4")
; #define DMP_CPUID_MX_PLUS 0x35504d44 ("DMP5")
; #define DMP_CPUID_EX 0x37504d44 ("DMP7")
iglobal
Vortex86CPUcode dd ? ; Vortex86 CPU code in HEX format (4 bytes), can be shown as string if converted to ASCII characters
Vortex86CPUid db 0 ; Vortex86 CPU id in integer format (1=Vortex86SX, 2=Vortex86DX, ...)
Vortex86SoCname db 'Vortex86 ',0 ; This variable will hold the full name of Vortex86 SoC
Vortex86SoClist: ; List of Vortex86 CPUs known today. Add new record to this list when new CPU becomes available
db 0x31, 'SX ' ; id=1
db 0x32, 'DX ' ; id=2
db 0x33, 'MX ' ; id=3
db 0x34, 'DX2' ; id=4
db 0x35, 'MX+' ; id=5
db 0x37, 'EX ' ; id=6
Vortex86SoCnum = ($ - Vortex86SoClist) / 4 ; Calculate the total number of known Vortex86 CPUs (if id=Vortex86SoCnum+1 --> unknown SoC)
endg
; When in debug mode, perform SoC detection regardless of the actual CPU vendor (even for vendors other than DMP)
; When in normal (not debug) mode, check the CPU vendor first, and perform SoC detection only if vendor is 'Vortex86 SoC'
if ~ VORTEX86DEBUG
cmp [cpu_vendor], 'Vort'
jnz .Vortex86end ; If the CPU vendor is not 'Vortex86 SoC', skip the SoC detection
end if
mov dx, 0xcf8 ; CF8h = Vortex86 PCI Configuration Address port
mov eax, 0x80000090 ; 0x80000090 = Starting PCI address to read from (32-bit register - accessed as DWORD)
out dx, eax ; Send request to PCI address port to retrieve data from this address
mov dx, 0xcfc ; CFCh = Vortex86 PCI Configuration Data port
in eax, dx ; Read data (SoC type) from PCI data port
if VORTEX86DEBUG ; When in debug mode, pretend that we received port output equal to "VORTEX86DEBUGVALUE"
mov eax, VORTEX86DEBUGVALUE
end if
DEBUGF 1, "K : Vortex86 SoC register returned 0x"
test eax, eax ; We need to break out in case the result is '\0' since otherwise we will fail at NULL string
jz .nullPCIoutput
mov [Vortex86CPUcode], eax
DEBUGF 1, "%x (%s): ", eax, Vortex86CPUcode
cmp ax, 4d44h ; Check whether it's Vortex86 family (all Vortex86 SoC have ID in form of "0xNN504d44")
jnz .notVortex86
shr eax, 16 ; Discard lower word in EAX which is always 4d44h in Vortex86 family
cmp al, 50h ; The 3rd byte is always 50h in Vortex86 SoC (if this is the case, we need just the highest byte)
jnz .notVortex86
mov bl, ah ; Copy SoC type to BL since EAX (that includes AH) is used implicitly in "LODSD" command below
mov esi, Vortex86SoClist ; ESI points to the start of Vortex86SoClist (used implicitly in "LODSD" command below)
xor ecx, ecx ; Zero ECX (it is used as counter)
cld ; Clears the DF flag in the EFLAGS register (DF=0 --> String operations increment ESI)
@@:
cmp ecx, Vortex86SoCnum ; Check if we iterated Vortex86SoCnum times already (i.e. went over the entire Vortex86SoClist)
ja .unknownVortex86 ; If the entire list was tested and our CPU is not in that list, it is unknown Vortex86 SoC
inc ecx ; Increment our counter
lodsd ; Load DWORD at address DS:ESI into EAX (puts 1 line from Vortex86SoClist into EAX, then increments ESI)
cmp bl, al ; Check if our CPU matches the current record in the list
jne @b ; No match --> repeat with next record
shr eax, 8 ; Match found --> drop the SoC type code from Vortex86SoClist name and replace it with \0
mov dword [Vortex86SoCname+8], eax ; Concatenate it with prefix to receive complete SoC name (\0 is string termination)
mov [Vortex86CPUid], cl ; Save the CPUid (1=Vortex86SX, 2=Vortex86DX, ..., Vortex86SoCnum+1=Unknown Vortex86)
DEBUGF 1, "%s (id=%d)\n", Vortex86SoCname, [Vortex86CPUid]:1
jmp .Vortex86end ; Say what we have found (CPU name and id) and exit
.nullPCIoutput: ; Emulators and non-Vortex86 CPU computers will usually return \0 in this register
DEBUGF 1, "0 (NULL)\n"
jmp .Vortex86end
.unknownVortex86:
mov [Vortex86CPUid], cl ; Save the CPUid (Vortex86SoCnum+1=Unknown Vortex86)
DEBUGF 1, "unknown Vortex86 CPU (id=%d, last known is %d)\n", [Vortex86CPUid]:1, Vortex86SoCnum
jmp .Vortex86end
.notVortex86: ; In case this register is used by other CPUs for other purpose, it's interesting what it contains
DEBUGF 1, "not a Vortex86 CPU\n"
.Vortex86end: