Difference between revisions of "Unit PlatformARM"

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<pre style="border: 0; padding-bottom:0px;">procedure ARMParseBootTags;</pre>
 
<pre style="border: 0; padding-bottom:0px;">procedure ARMParseBootTags;</pre>
 
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Extract some information from the ARM boot tag list and use it to load the memory manager, some other information is stored in variables for future use</div>
 
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Extract some information from the ARM boot tag list and use it to load the memory manager, some other information is stored in variables for future use</div>
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<pre style="border: 0; padding-bottom:0px;">function ExtractCommandLine(Value:PChar):Boolean;</pre>
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<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
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<pre style="border: 0; padding-bottom:0px;">function ExtractMemoryBlock(Address,Size:LongWord):Boolean;</pre>
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<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
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<pre style="border: 0; padding-bottom:0px;">function ExtractInitialRamdisk(Address,Size:LongWord):Boolean;</pre>
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<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
 
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Revision as of 04:28, 29 October 2021

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Description

Ultibo Platform Interface unit for ARM

Constants


[Expand]
ARM mode ARM_MODE_*


[Expand]
ARM interrupt disable ARM_I_*


[Expand]
ARM thumb and jazelle ARM_*_BIT


[Expand]
ARM abort ARM_A_*


[Expand]
ARM boot tag ATAG_*


[Expand]
ARM machine type ARM_MACHINE_*


Type definitions


ARM boot tag header

[Expand]

PARMTagHeader = ^TARMTagHeader;

TARMTagHeader = record

ARM tag core

[Expand]

PARMTagCore = ^TARMTagCore;

TARMTagCore = record

ARM tag memory

[Expand]

PARMTagMemory = ^TARMTagMemory;

TARMTagMemory = record

ARM tag video text

[Expand]

PARMTagVideoText = ^TARMTagVideoText;

TARMTagVideoText = record

ARM tag ramdisk

[Expand]

PARMTagRamdisk = ^TARMTagRamdisk;

TARMTagRamdisk = record

ARM tag initialize ramdisk

[Expand]

PARMTagInitRd2 = ^TARMTagInitRd2;

TARMTagInitRd2 = record

ARM tag serial

[Expand]

PARMTagSerial = ^TARMTagSerial;

TARMTagSerial = record

ARM tag revision

[Expand]

PARMTagRevision = ^TARMTagRevision;

TARMTagRevision = record

ARM tag video framebuffer

[Expand]

PARMTagVideoFB = ^TARMTagVideoFB;

TARMTagVideoFB = record

ARM tag command

[Expand]

PARMTagCommand = ^TARMTagCommand;

TARMTagCommand = record

ARM boot tag

[Expand]

PARMTag = ^TARMTag;

TARMTag = record

ARM wait

TARMWait = procedure;

ARM long wait

TARMLongWait = procedure;

ARM short wait

TARMShortWait = procedure;

ARM slow blink

TARMSlowBlink = procedure;

ARM fast blink

TARMFastBlink = procedure;


Public variables


ARM specific variables

ARMInitialized:Boolean;
ARMBootMode:LongWord = 0; The ARM Mode that the processor was in at boot time (Set by Startup)
ARMBootVectors:LongWord = 0; The Vector Base Address that was current at boot time (Set by Startup)
ARMTagsAddress:PtrUInt = ARMTAGS_INITIAL; Pointer to the ARM TAGS provided by the bootloader at startup (Set by Startup)
ARMMachineType:LongWord = 0; ARM Machine Type provided by the bootloader at startup (Set by Startup)
ARMSecureBoot:LongWord = 1; If 1 then startup will attempt to switch back to secure world during boot process (If supported by the ARM boot stub)
ARMEmulatorMode:LongWord = 0; If 1 then startup detected that the machine is running in an emulator (If applicable)

Note: These variables must be initialized to remain in .data or else they are rewritten to zero with .bss

ARM tags

ARMTagsCount:LongWord; Number of ARM Tags found during parse

Tag none variables

TagNoneCount:LongWord; Number of ARM NONE Tags found during parse

Tag core

TagCoreCount:LongWord; Number of ARM CORE Tags found during parse
TagCoreFlags:LongWord;
TagCorePageSize:LongWord;
TagCoreRootDevice:LongWord;

Tag memory

TagMemoryCount:LongWord; Number of ARM MEM Tags found during parse
TagMemorySize:LongWord; Size of the last block reported by ARM Tags
TagMemoryStart:PtrUInt; Start of the last block reported by ARM Tags
TagMemoryLength:LongWord; Adjusted Size of the last block reported by ARM Tags
TagMemoryAddress:PtrUInt; Adjusted Address of the last block reported by ARM Tags

Tag video text

TagVideoTextCount:LongWord; Number of ARM VIDEOTEXT Tags found during parse

Tag ramdisk

TagRamdiskCount:LongWord; Number of ARM RAMDISK Tags found during parse

Tag initialize RD2

TagInitRd2Count:LongWord; Number of ARM INITRD2 Tags found during parse

Tag serial

TagSerialCount:LongWord; Number of ARM SERIAL Tags found during parse
TagSerialNoLow:LongWord;
TagSerialNoHigh:LongWord;

Tag revision

TagRevisionCount:LongWord; Number of ARM REVISION Tags found during parse
TagRevisionNo:LongWord;

Tag video framebuffer

TagVideoFBCount:LongWord; Number of ARM VIDEOLFB Tags found during parse

Tag command

TagCmdCount:LongWord; Number of ARM CMDLINE Tags found during parse
TagCommandSize:LongWord; Length of the command line in characters (Including null terminator)
TagCommandCount:LongInt; Count of parameters (space delimited) in the command line
TagCommandAddress:PChar; Pointer to the start of the command line

Wait handlers

ARMWaitHandler:TARMWait;
ARMLongWaitHandler:TARMLongWait;
ARMShortWaitHandler:TARMShortWait;

Blink handlers

ARMSlowBlinkHandler:TARMSlowBlink;
ARMFastBlinkHandler:TARMFastBlink;


Function declarations


Initialization functions

[Expand] 
procedure ARMInit;
Description: To be documented


ARM platform functions

[Expand] 
procedure ARMParseBootTags;
Description: Extract some information from the ARM boot tag list and use it to load the memory manager, some other information is stored in variables for future use


[Expand] 
function ExtractCommandLine(Value:PChar):Boolean;
Description: To be documented


[Expand] 
function ExtractMemoryBlock(Address,Size:LongWord):Boolean;
Description: To be documented


[Expand] 
function ExtractInitialRamdisk(Address,Size:LongWord):Boolean;
Description: To be documented


[Expand] 
procedure ARMParseCommandLine;
Description: Setup argc, argv and cmdline and process known command line options


[Expand] 
procedure ARMParseEnvironment;
Description: Setup envp and process known environment options


[Expand] 
function ARMGetSP:PtrUInt; assembler; nostackframe;
Description: Get the current stack pointer (SP)


[Expand] 
function ARMGetPC:PtrUInt; assembler; nostackframe;
Description: Get the current program counter (PC)


[Expand] 
function ARMGetIRQ:Boolean; assembler; nostackframe;
Description: Get Interrupts (IRQ) state


[Expand] 
procedure ARMEnableIRQ; assembler; nostackframe;
Description: Enable Interrupts (IRQ) unconditionally


[Expand] 
procedure ARMDisableIRQ; assembler; nostackframe;
Description: Disable Interrupts (IRQ) unconditionally


[Expand] 
function ARMSaveIRQ:TIRQMask; assembler; nostackframe;
Description: Disable Interrupts (IRQ) and return the previous state


[Expand] 
function ARMRestoreIRQ(IRQMask:TIRQMask):TIRQMask; assembler; nostackframe;
Description: Restore Interrupts (IRQ) to a previous state


[Expand] 
function ARMGetFIQ:Boolean; assembler; nostackframe;
Description: Get Fast Interrupts (FIQ) state


[Expand] 
procedure ARMEnableFIQ; assembler; nostackframe;
Description: Enable Fast Interrupts (FIQ) unconditionally


[Expand] 
procedure ARMDisableFIQ; assembler; nostackframe;
Description: Disable Fast Interrupts (FIQ) unconditionally


[Expand] 
function ARMSaveFIQ:TFIQMask; assembler; nostackframe;
Description: Disable Fast Interrupts (FIQ) and return the previous state


[Expand] 
function ARMRestoreFIQ(FIQMask:TFIQMask):TFIQMask; assembler; nostackframe;
Description: Restore Fast Interrupts (FIQ) to a previous state


[Expand] 
procedure ARMEnableIRQFIQ; assembler; nostackframe;
Description: Enable Interrupts and Fast Interrupts (IRQ/FIQ) unconditionally


[Expand] 
procedure ARMDisableIRQFIQ; assembler; nostackframe;
Description: Disable Interrupts and Fast Interrupts (IRQ/FIQ) unconditionally


[Expand] 
function ARMSaveIRQFIQ:TIRQFIQMask; assembler; nostackframe;
Description: Disable Interrupts and Fast Interrupts (IRQ/FIQ) and return the previous state


[Expand] 
function ARMRestoreIRQFIQ(IRQFIQMask:TIRQFIQMask):TIRQFIQMask; assembler; nostackframe;
Description: Restore Interrupts and Fast Interrupts (IRQ/FIQ) to a previous state


[Expand] 
function ARMGetAbort:Boolean; assembler; nostackframe;
Description: Get Abort state


[Expand] 
procedure ARMEnableAbort; assembler; nostackframe;
Description: Enable Aborts unconditionally


[Expand] 
procedure ARMDisableAbort; assembler; nostackframe;
Description: Disable Aborts unconditionally


[Expand] 
function ARMSaveAbort:TAbortMask; assembler; nostackframe;
Description: Disable Aborts and return the previous state


[Expand] 
function ARMRestoreAbort(AbortMask:TAbortMask):TAbortMask; assembler; nostackframe;
Description: Restore Aborts to a previous state


ARM helper functions

[Expand] 
procedure ARMWait; inline;
Description: To be documented


[Expand] 
procedure ARMLongWait; inline;
Description: To be documented


[Expand] 
procedure ARMShortWait; inline;
Description: To be documented


[Expand] 
procedure ARMSlowBlink; inline;
Description: To be documented


[Expand] 
procedure ARMFastBlink; inline;
Description: To be documented


[Expand] 
function ARMModeToString(ARMMode:LongWord):String;
Description: To be documented


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