Unit PlatformQEMUVPB
From Ultibo.org
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Description
Ultibo Platform interface unit for QEMU VersatilePB
To be documented
Constants
QEMUVPB specific constants
QEMUVPB_* QEMUVPB_STARTUP_ADDRESS = $00010000;
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Address of StartupHandler on Reset |
QEMUVPB page table constants
QEMUVPB_PAGE_TABLE_* QEMUVPB_PAGE_TABLE_BASE = $00004000;
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Place the first level Page Table after the interrupt vectors at 0x00001000 and before the code start at 0x00010000 |
QEMUVPB_PAGE_TABLE_SIZE = SIZE_16K;
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ARMv7 first level Page Table is exactly 16KB in size (4096 32 bit (4 byte) entries) |
QEMUVPB vector table constants
QEMUVPB_VECTOR_TABLE_* QEMUVPB_VECTOR_TABLE_BASE = $00001000;
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Place the Interrupt Vector Table at 0x00001000 before the code start at 0x00010000 |
QEMUVPB_VECTOR_TABLE_SIZE = SIZE_64;
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The Interrupt Vector Table is exactly 64 bytes (16 32 bit (4 byte) entries) |
QEMUVPB_VECTOR_TABLE_COUNT = 8;
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The Interrupt Vector Table contains 8 entries on an ARMv7 device |
QEMUVPB CPU count constants
QEMUVPB_CPU_* QEMUVPB_CPU_COUNT = VERSATILEPB_CPU_COUNT;
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QEMUVPB_CPU_BOOT = CPU_ID_0;
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QEMUVPB_CPU_MASK = CPU_AFFINITY_0;
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QEMUVPB SWI constants
QEMUVPB_SWI_* QEMUVPB_SWI_COUNT = 256;
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Number of available SWI entries |
QEMUVPB kernel name constants
QEMUVPB_KERNEL_* QEMUVPB_KERNEL_NAME = 'kernel.bin';
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QEMUVPB_KERNEL_NAME = 'kernel64.bin';
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QEMUVPB_KERNEL_CONFIG = ;
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Not available as a file |
QEMUVPB_KERNEL_COMMAND = ;
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Not available as a file |
Type definitions
To be documented
Public variables
QEMUVPB specific Ultibo variables
QEMUVPBInitialized:Boolean;
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Clock variables
ClockGetLock:LongWord;
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Atomic lock variable for updating the clock rollover |
ClockGetLast:LongWord;
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Value of 24MHz Counter on last ClockGetCount or ClockGetTotal call |
ClockGetRollover:LongWord;
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Number of times the 24MHz counter has rolled over (Only accurate if ClockGetCount/ClockGetTotal is called at least once per 178 seconds) |
Timer variables
Timer0Registers:PSP804TimerRegisters;
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Use Timer0 for Clock |
Timer2Registers:PSP804TimerRegisters;
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Use Timer2 for Scheduler |
Interrupt variables
PrimaryInterruptRegisters:PPL190InterruptRegisters;
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SecondaryInterruptRegisters:PVersatilePBInterruptRegisters;
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InterruptEntries:array[0..(VERSATILEPB_IRQ_COUNT - 1)] of TInterruptEntry;
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System call variables
SystemCallEntries:array[0..QEMUVPB_SWI_COUNT - 1] of TSystemCallEntry;
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IRQ/FIQ variables
IRQEnabled:array[0..1] of LongWord;
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2 groups of IRQs to Enable/Disable (See: TPL190InterruptRegisters) |
FIQEnabled:LongWord;
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The single IRQ number to Enable as FIQ instead (See: TPL190InterruptRegisters) |
Function declarations
Initialization functions
procedure QEMUVPBInit;
Description: To be documented
| Note | None documented |
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QEMUVPB platform functions
procedure QEMUVPBBoardInit;
Description: To be documented
| Note | None documented |
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procedure QEMUVPBMemoryInit;
Description: To be documented
| Note | None documented |
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procedure QEMUVPBClockInit;
Description: To be documented
| Note | None documented |
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procedure QEMUVPBPowerInit;
Description: To be documented
| Note | None documented |
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procedure QEMUVPBInterruptInit;
Description: To be documented
| Note | None documented |
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procedure QEMUVPBPeripheralInit;
Description: To be documented
| Note | None documented |
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procedure QEMUVPBFramebufferInit;
Description: To be documented
| Note | None documented |
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procedure QEMUVPBPageTableInit;
Description: Initialize the Hardware Page Tables before enabling the MMU
| Note | See ?????? |
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function QEMUVPBRequestExIRQ(CPUID,Number:LongWord; Handler:TInterruptHandler; HandlerEx:TInterruptExHandler; Parameter:Pointer):LongWord;
Description: Request registration of the supplied handler to the specified IRQ number
| CPUID | CPU to route IRQ to |
|---|---|
| Number | IRQ number to register |
| Handler | Interrupt handler function to register |
| HandlerEx | Extended Interrupt handler function to register |
| Note | Only one of Handler or HandlerEx can be specified |
function QEMUVPBReleaseExIRQ(CPUID,Number:LongWord; Handler:TInterruptHandler; HandlerEx:TInterruptExHandler; Parameter:Pointer):LongWord;
Description: Request deregistration of the supplied handler from the specified IRQ number
| CPUID | CPU to route IRQ to |
|---|---|
| Number | IRQ number to deregister |
| Handler | Interrupt handler function to deregister |
| HandlerEx | Extended Interrupt handler function to deregister |
| Note | Only one of Handler or HandlerEx can be specified |
function QEMUVPBRequestExFIQ(CPUID,Number:LongWord; Handler:TInterruptHandler; HandlerEx:TInterruptExHandler; Parameter:Pointer):LongWord;
Description: Request registration of the supplied handler to the specified FIQ number
| CPUID | CPU to route FIQ to |
|---|---|
| Number | FIQ number to register |
| Handler | Interrupt handler function to register |
| HandlerEx | Extended Interrupt handler function to register |
| Note | Only one of Handler or HandlerEx can be specified |
function QEMUVPBReleaseExFIQ(CPUID,Number:LongWord; Handler:TInterruptHandler; HandlerEx:TInterruptExHandler; Parameter:Pointer):LongWord;
Description: Request deregistration of the supplied handler from the specified FIQ number
| CPUID | CPU to route FIQ to |
|---|---|
| Number | FIQ number to deregister |
| Handler | Interrupt handler function to deregister |
| HandlerEx | Extended Interrupt handler function to deregister |
| Note | Only one of Handler or HandlerEx can be specified |
function QEMUVPBRegisterSystemCallEx(CPUID,Number:LongWord; Handler:TSystemCallHandler; HandlerEx:TSystemCallExHandler):LongWord;
Description: Request registration of the supplied extended handler to the specified System Call number
| CPUID | The CPU ID to register the System Call against (Ignored on QEMUVPB) |
|---|---|
| Number | The System Call number to be registered |
| Handler | The handler function to be registered |
| HandlerEx | The extended handler function to be registered |
| Note | Only one of Handler or HandlerEx can be specified |
function QEMUVPBDeregisterSystemCallEx(CPUID,Number:LongWord; Handler:TSystemCallHandler; HandlerEx:TSystemCallExHandler):LongWord;
Description: Request deregistration of the supplied extended handler from the specified System Call number
| CPUID | The CPU ID to deregister the System Call from (Ignored on QEMUVPB) |
|---|---|
| Number | The System Call number to be deregistered |
| Handler | The handler function to be deregistered |
| HandlerEx | The extended handler function to be deregistered |
| Note | Only one of Handler or HandlerEx can be specified |
function QEMUVPBGetInterruptEntry(Number:LongWord):TInterruptEntry;
Description: To be documented
| Note | Get the interrupt entry for the specified interrupt number |
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function QEMUVPBGetSystemCallEntry(Number:LongWord):TSystemCallEntry;
Description: Get the system call entry for the specified system call number
| Note | None documented |
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function QEMUVPBSystemRestart(Delay:LongWord):LongWord;
Description: To be documented
| Note | None documented |
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function QEMUVPBSystemShutdown(Delay:LongWord):LongWord;
Description: To be documented
| Note | None documented |
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function QEMUVPBClockGetCount:LongWord;
Description: Gets the current system clock count (32 least significant bits of total)
| Note | On the VersatilePB this comes from the 24MHz counter which will overflow every 178 seconds |
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function QEMUVPBClockGetTotal:Int64;
Description: Gets the total system clock count
| Note | On the VersatilePB this comes from the 24MHz counter which will overflow every 178 seconds and increment the rollover value. This is only accurate if either ClockGetCount or ClockGetTotal is called at least once per 178 seconds on order to increment the rollover. |
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QEMUVPB thread functions
procedure QEMUVPBSchedulerInit;
Description: Initialize the scheduler interrupt on the boot CPU
| Note | None documented |
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QEMUVPB IRQ functions
function QEMUVPBDispatchIRQ(CPUID:LongWord; Thread:TThreadHandle):TThreadHandle;
Description: Process any pending IRQ requests
| Note | Called by ARMv7/8IRQHandler in PlatformARMv7/8
A DataMemoryBarrier is executed before and after calling this function |
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function QEMUVPBHandleIRQ(Number,CPUID:LongWord; Thread:TThreadHandle):TThreadHandle;
Description: Call the handler function for an IRQ that was received, or halt if it doesn't exist
| Note | None documented |
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QEMUVPB FIQ functions
function QEMUVPBDispatchFIQ(CPUID:LongWord; Thread:TThreadHandle):TThreadHandle;
Description: Process any pending FIQ requests
| Note | Called by ARMv7/8FIQHandler in PlatformARMv7/8
A DataMemoryBarrier is executed before and after calling this function |
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function QEMUVPBHandleFIQ(Number,CPUID:LongWord; Thread:TThreadHandle):TThreadHandle;
Description: Call the handler function for an FIQ that was received, or halt if it doesn't exist
| Note | None documented |
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QEMUVPB SWI functions
function QEMUVPBDispatchSWI(CPUID:LongWord; Thread:TThreadHandle; Request:PSystemCallRequest):TThreadHandle;
Description: Process an SWI request
| Note | Called by ARMv7/8SoftwareInterruptHandler in PlatformARMv7/8
A DataMemoryBarrier is executed before and after calling this function |
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QEMUVPB clock functions
procedure QEMUVPBClockInterrupt(Parameter:Pointer);
Description: Interrupt handler function for the clock interrupt
| Note | This schedules another clock interrupt to occur CLOCK_CYCLES_PER_TICK in the future, then updates ClockTicks and ClockSeconds and checks for timers to trigger. |
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procedure QEMUVPBClockUpdate(Cycles:LongWord; var Last:LongWord);
Description: Setup a clock interrupt to trigger after the specified number of clock cycles
| Cycles | Number of cycles after which the timer interrupt is to be triggered |
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| Note | This refers to native clock cycles as specified by CLOCK_FREQUENCY |
QEMUVPB scheduler functions
function QEMUVPBSchedulerInterrupt(CPUID:LongWord; Thread:TThreadHandle; Parameter:Pointer):TThreadHandle;
Description: Interrupt handler function for the scheduler interrupt
| Note | This schedules another scheduler interrupt to occur SCHEDULER_CLOCKS_PER_INTERRUPT in the future, then checks for threads to wakeup or timeout and the next thread to schedule. |
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procedure QEMUVPBSchedulerUpdate(Cycles:LongWord; var Last:LongWord);
Description: Setup a scheduler interrupt to trigger after the specified number of clock cycles
| Cycles | Number of cycles after which the scheduler interrupt is to be triggered |
|---|---|
| Note | This refers to native clock cycles as specified by VERSATILEPB_TIMER_FREQUENCY |
procedure QEMUVPBSchedulerSystemCall(Request:PSystemCallRequest);
Description: System Call handler for the scheduler
| Note | This is registered to receive requests for the SYSTEM_CALL_CONTEXT_SWITCH and will perform a context switch from within an SWI |
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QEMUVPB framebuffer functions
function QEMUVPBFramebufferDeviceAllocate(Framebuffer:PFramebufferDevice; Properties:PFramebufferProperties):LongWord;
Description: Implementation of FramebufferDeviceAllocate API for PL110 Framebuffer
| Note | Not intended to be called directly by applications, use FramebufferDeviceAllocate instead |
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function QEMUVPBFramebufferDeviceRelease(Framebuffer:PFramebufferDevice):LongWord;
Description: Implementation of FramebufferDeviceRelease API for PL110 Framebuffer
| Note | Not intended to be called directly by applications, use FramebufferDeviceRelease instead |
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function QEMUVPBFramebufferDeviceBlank(Framebuffer:PFramebufferDevice; Blank:Boolean):LongWord;
Description: Implementation of FramebufferDevicBlank API for PL110 Framebuffer
| Note | Not intended to be called directly by applications, use FramebufferDevicBlank instead |
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function QEMUVPBFramebufferDeviceCommit(Framebuffer:PFramebufferDevice; Address,Size,Flags:LongWord):LongWord;
Description: Implementation of FramebufferDeviceCommit API for PL110 Framebuffer
| Note | Not intended to be called directly by applications, use FramebufferDeviceCommit instead |
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function QEMUVPBFramebufferDeviceSetProperties(Framebuffer:PFramebufferDevice; Properties:PFramebufferProperties):LongWord;
Description: Implementation of FramebufferDeviceSetProperties API for PL110 Framebuffer
| Note | Not intended to be called directly by applications, use FramebufferDeviceSetProperties instead |
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QEMUVPB helper functions
procedure QEMUVPBBootBlink; assembler; nostackframe;
Description: Output characters to UART0 without dependency on any other RTL setup
| Note | None documented |
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procedure QEMUVPBBootOutput(Value:LongWord);
Description: Output characters to UART0 without dependency on any other RTL setup
| Note | Based on hexstrings() function by dwelch67 (https://github.com/dwelch67) |
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