3,11 → 3,12 |
;; 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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; 20/11/2013 yogev_ezra: Initial version (Vortex86 SoC type detection) |
; 26/11/2013 yogev_ezra: Added CPU speed modifier and MMX support flag detection |
; Thanks for help to: dunkaist, eAndrew, hidnplayr, Mario |
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$Revision$ |
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VORTEX86DEBUG = 0 ; For testing in emulators and in non-Vortex86 CPU computers, set this to 1 |
29,11 → 30,11 |
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 0x33, 'MX ' ; id=3 MMX is available starting from CPU code '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) |
db 0x37, 'EX ' ; id=7 |
Vortex86SoCnum = ($ - Vortex86SoClist) / 4 ; Calculate the total number of known Vortex86 CPUs |
endg |
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; When in debug mode, perform SoC detection regardless of the actual CPU vendor (even for vendors other than DMP) |
43,17 → 44,14 |
jnz .Vortex86end ; If the CPU vendor is not 'Vortex86 SoC', skip the SoC detection |
end if |
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mov dx, 0xcf8 ; CF8h = Vortex86 PCI Configuration Address port |
mov eax, OS_BASE+0x90 ; 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 |
call .Vortex86PCIreg ; Get the CPU code from Vortex86 SoC PCI register (Register Offset: 93H~90H) |
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if VORTEX86DEBUG ; When in debug mode, pretend that we received port output equal to "VORTEX86DEBUGVALUE" |
mov eax, VORTEX86DEBUGVALUE |
end if |
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DEBUGF 1, "K : Vortex86 SoC register returned 0x" |
DEBUGF 1, "K : Vortex86 SoC type register (93H~90H) returned 0x" |
test eax, eax ; Check whether the port output was '\0' |
jz .nullPCIoutput ; In case the result is '\0' (NULL), skip further testing and exit |
mov [Vortex86CPUcode], eax ; Save HEX CPU code to Vortex86CPUcode (so it can be used later) |
63,8 → 61,11 |
bswap eax ; Assumed it is Vortex86 SoC, the highest byte identifies the exact CPU, so move it to the lowest byte |
mov bl, al ; Copy SoC type to BL since EAX (that includes AL) is used implicitly in "LODSD" command below |
cmp eax, ebx ; Now see whether the 3 higher bytes were "0x504d44" (which means it's Vortex86) |
jnz .notVortex86 ; Sorry, it's not Vortex86 - go say so and exit |
jnz .notVortex86 ; If it's not Vortex86 - go say so and exit |
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sub al, 0x30 ; Current Vortex86 CPU codes are in the range of 31h-37h, so convert them to integer (1,2,...) |
mov [Vortex86CPUid], al ; Save the CPUid (1=Vortex86SX, 2=Vortex86DX, ..., 7=Vortex86EX, ...) |
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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) |
78,19 → 79,65 |
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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) |
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DEBUGF 1, "%s (id=%d)\n", Vortex86SoCname, [Vortex86CPUid]:1 ; Say what we have found (CPU name and id) |
jmp .Vortex86end |
jmp .Vortex86 |
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.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" |
jmp .Vortex86end |
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.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 |
.unknownVortex86: ; It is Vortex86 CPU, but it's not in the list above |
DEBUGF 1, "unknown Vortex86 CPU (id=%d)\n", [Vortex86CPUid]:1 ; Inform the user that the CPU is Vortex86 but name is unknown |
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.Vortex86: |
mov eax, OS_BASE+0xA0 ; 0x800000A0 = Starting PCI address to read from (32-bit register - accessed as DWORD) |
call .Vortex86PCIreg ; Get current flags of Vortex86SoC Host Control Register (Register Offset: A3h~A0h) |
DEBUGF 1, "K : Vortex86 Host Control Register (A3h~A0h) returned 0x%x: CPU speed is ",eax |
mov bl, al ; The lower byte of Vortex86 Host Control Register contains CPU speed modifier and MMX support status |
mov bh, al ; Backup the current AL value, so later we can test whether the value has changed |
and bl, 00000111b ; CPU speed modifier is stored in bits 0-2. Value=0 means MAX speed, other values - speed reduction |
jz .Vortex86CPUspeedMAX ; 0s in bits 0-2: CPU is at MAX speed (no need to modify) |
inc bl ; The actual value is 1 less than 'Divide by' setting (value '001' means 'Divide by 2', etc.) |
DEBUGF 1, "reduced (divide by %d).\nK : Vortex86 changing CPU speed to ", bl ; Print the current CPU speed modifier to the log |
and al, 11111000b ; At least one of the bits 0-2 contains 1: CPU is at reduced speed. Set bits 0-2 to 0s to change to MAX |
.Vortex86CPUspeedMAX: |
DEBUGF 1, "MAX\n" ; Now the CPU should be running at MAX speed (don't write the value to PCI port yet) |
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cmp [Vortex86CPUid], 3 ; MMX is available starting from CPU code 'MX' (id=3) |
jb .skipVortex86MMX ; No MMX support - skip MMX support status detection (for id=1,2) |
DEBUGF 1, "K : Vortex86 MMX support status: MMX is " ; Bits 5-6 in Host Control Register contain MMX status |
test al, 100000b ; On MMX-capable Vortex86 SoC, Bit5 = is MMX enabled? (1=Yes/0=No) |
jnz .Vortex86MMXenabled ; MMX is already enabled (Bit5=1) |
DEBUGF 1, "DISABLED - enabling it for this session\n" ; Print to the log that MMX is disabled |
or al, 100000b ; Enable MMX support (don't write the value to PCI port yet) |
jmp .AfterMMXenabled |
.Vortex86MMXenabled: |
DEBUGF 1, "ENABLED\n" ; Print to the log that MMX is enabled |
.AfterMMXenabled: |
DEBUGF 1, "K : Vortex86 MMX report to CPUID: " ; Print to the log what CPUID command knowns about MMX support |
test al, 1000000b ; On MMX-capable Vortex86 SoC, Bit6 = report MMX support to CPUID? (1=Yes/0=No) |
jnz .Vortex86MMXreported ; MMX is already reported to CPUID (Bit6=1) |
DEBUGF 1, "OFF - turning it ON for this session\n" ; Print to the log that MMX will now be reported to CPUID |
or al, 1000000b ; Turn on MMX reporting to CPUID (don't write the value to PCI port yet) |
jmp .skipVortex86MMX |
.Vortex86MMXreported: |
DEBUGF 1, "ON\n" ; Print to the log that MMX reporting to CPUID is enabled |
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.skipVortex86MMX: |
cmp bh, al ; Check whether AL has changed before (if it did, we need to write it back to PCI port) |
jz .Vortex86end ; No change - no need to write to the port |
out dx, al ; Write the changed data to PCI port |
DEBUGF 1, "K : Vortex86 Host Control Register (A3h~A0h) new value is 0x%x\n",eax |
jmp .Vortex86end |
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.Vortex86PCIreg: ; Procedure receives input register value in EAX, and returns the output value also in EAX |
mov dx, 0xcf8 ; CF8h = Vortex86 PCI Configuration Address port |
out dx, eax ; Send request to PCI address port to retrieve data from this address |
mov dl, 0xfc ; CFCh = Vortex86 PCI Configuration Data port |
in eax, dx ; Read data from PCI data port |
ret |
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.nullPCIoutput: ; Emulators and non-Vortex86 CPU computers will usually return \0 in this register |
DEBUGF 1, "0 (NULL)\n" |
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