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Rename PPC405 to PPC405_Xilinx.
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Richard Barry
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commit
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3 changed files with 0 additions and 0 deletions
241
Source/portable/GCC/PPC405_Xilinx/portasm.s
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241
Source/portable/GCC/PPC405_Xilinx/portasm.s
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#include "xreg405.h"
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.extern pxCurrentTCB
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.extern vTaskSwitchContext
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.extern vTaskIncrementTick
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.extern vPortISRHandler
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.global vPortStartFirstTask
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.global vPortYield
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.global vPortTickISR
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.global vPortISRWrapper
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.set portCONTEXT_SIZE, 156
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.set portR0_OFFSET, 152
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.set portGPR_OFFSET, 32
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.set portCR_OFFSET, 28
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.set portXER_OFFSET, 24
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.set portLR_OFFSET, 16
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.set portCTR_OFFSET, 16
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.set portUSPRG0_OFFSET, 12
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.set portSRR0_OFFSET, 8
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.set portSRR1_OFFSET, 4
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.set BChainField, 0
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.set NextLRField, BChainField + 4
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.set MSRField, NextLRField + 4
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.set PCField, MSRField + 4
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.set LRField, PCField + 4
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.set CTRField, LRField + 4
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.set XERField, CTRField + 4
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.set CRField, XERField + 4
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.set USPRG0Field, CRField + 4
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.set r0Field, USPRG0Field + 4
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.set r2Field, r0Field + 4
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.set r3r31Field, r2Field + 4
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.set IFrameSize, r3r31Field + ( ( 31 - 3 ) + 1 ) * 4
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.macro portRESTORE_CONTEXT
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# Get the address of the TCB.
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xor R0, R0, R0
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addis SP, R0, pxCurrentTCB@ha
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lwz SP, pxCurrentTCB@l( SP )
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# Get the task stack pointer from the TCB.
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lwz SP, 0( SP )
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# Pop the special purpose registers
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lwz R0, portSRR1_OFFSET( SP )
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mtspr SRR1, R0
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lwz R0, portSRR0_OFFSET( SP )
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mtspr SRR0, R0
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lwz R0, portUSPRG0_OFFSET( SP )
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mtspr 256, R0 #USPRG0
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lwz R0, portCTR_OFFSET( SP )
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mtspr CTR, R0
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lwz R0, portLR_OFFSET( SP )
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mtspr LR, R0
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lwz R0, portXER_OFFSET( SP )
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mtspr XER, R0
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lwz R0, portCR_OFFSET( SP )
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mtcr R0
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# Pop GPRs
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lmw R2, portGPR_OFFSET( SP )
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# Finally pop R0 and correct the stack pointer
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lwz R0, portR0_OFFSET( SP )
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addi R1, R1, portCONTEXT_SIZE
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# Start the task running
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rfi
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.endm
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.macro portSAVE_CONTEXT
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# Make room on the stack.
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subi R1, R1, portCONTEXT_SIZE
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# Push R0, then the GPRs
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stw R0, portR0_OFFSET( SP )
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stm R2, portGPR_OFFSET( SP )
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# Push the SFRs
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mfcr R0
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stw R0, portCR_OFFSET( SP )
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mfspr R0, XER
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stw R0, portXER_OFFSET( SP )
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mfspr R0, LR
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stw R0, portLR_OFFSET( SP )
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mfspr R0, CTR
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stw R0, portCTR_OFFSET( SP )
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mfspr R0, 256 #USPRG0
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stw R0, portUSPRG0_OFFSET( SP )
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mfspr R0, SRR0
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stw R0, portSRR0_OFFSET( SP )
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mfspr R0, SRR1
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stw R0, portSRR1_OFFSET( SP )
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# Get the address of the TCB.
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xor R0, R0, R0
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addis R2, R0, pxCurrentTCB@ha
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lwz R2, pxCurrentTCB@l( R2 )
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# Store the stack pointer into the TCB
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stw SP, 0( R2 )
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.endm
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.macro int_epilogue
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# Get the address of the TCB.
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xor R0, R0, R0
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addis SP, R0, pxCurrentTCB@ha
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lwz SP, pxCurrentTCB@l( SP )
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# Get the task stack pointer from the TCB.
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lwz SP, 0( SP )
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# Restore MSR register to SRR1.
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lwz R0,MSRField(R1)
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mtsrr1 R0
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# Restore current PC location to SRR0.
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lwz R0,PCField(R1)
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mtsrr0 R0
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# Save USPRG0 register
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lwz R0,USPRG0Field(R1)
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mtspr 0x100,R0
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# Restore Condition register
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lwz R0,CRField(R1)
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mtcr R0
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# Restore Fixed Point Exception register
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lwz R0,XERField(R1)
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mtxer R0
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# Restore Counter register
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lwz R0,CTRField(R1)
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mtctr R0
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# Restore Link register
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lwz R0,LRField(R1)
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mtlr R0
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# Restore remaining GPR registers.
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lmw R3,r3r31Field(R1)
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# Restore r0 and r2.
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lwz R0,r0Field(R1)
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lwz R2,r2Field(R1)
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# Remove frame from stack
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addi R1,R1,IFrameSize
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.endm
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.macro portENTER_SWITCHING_ISR
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# Get the address of the TCB.
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xor R0, R0, R0
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addis R2, R0, pxCurrentTCB@ha
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lwz R2, pxCurrentTCB@l( R2 )
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# Store the stack pointer into the TCB
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stw SP, 0( R2 )
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# Save the link register
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stwu R1, -24( R1 )
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mflr R0
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stw R31, 20( R1 )
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stw R0, 28( R1 )
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mr R31, r1
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.endm
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.macro portEXIT_SWITCHING_ISR
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# Restore the link register
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lwz R11, 0( R1 )
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lwz R0, 4( R11 )
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mtlr R0
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lwz R31, -4( R11 )
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mr R1, R11
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# Get the address of the TCB.
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xor R0, R0, R0
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addis SP, R0, pxCurrentTCB@ha
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lwz SP, pxCurrentTCB@l( R1 )
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# Get the task stack pointer from the TCB.
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lwz SP, 0( SP )
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.endm
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vPortStartFirstTask:
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int_epilogue
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rfi
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#vPortStartFirstTask:
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# portRESTORE_CONTEXT
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# rfi
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vPortYield:
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portENTER_SWITCHING_ISR
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bl vTaskSwitchContext
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portEXIT_SWITCHING_ISR
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blr
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vPortTickISR:
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portENTER_SWITCHING_ISR
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bl vTaskIncrementTick
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#if configUSE_PREEMPTION == 1
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bl vTaskSwitchContext
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#endif
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# Clear the interrupt
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lis R0, 2048
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mttsr R0
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portEXIT_SWITCHING_ISR
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blr
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vPortISRWrapper:
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portENTER_SWITCHING_ISR
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bl vPortISRHandler
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portEXIT_SWITCHING_ISR
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blr
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