URL https://opencores.org/ocsvn/plasma/plasma/trunk

Subversion Repositories plasma

[/] [plasma/] [trunk/] [tools/] [boot.asm] - Diff between revs 177 and 194

Rev 177	Rev 194
Line 76...	Line 76...
`mfhi $27`	`mfhi $27`
`sw $27, 92($29) #hi`	`sw $27, 92($29) #hi`
`mflo $27`	`mflo $27`
`sw $27, 96($29) #lo`	`sw $27, 96($29) #lo`

`addi $5, $29, 0`
`lui $6, 0x2000`	`lui $6, 0x2000`
`lw $4, 0x20($6) #IRQ_STATUS`	`lw $4, 0x20($6) #IRQ_STATUS`
`lw $6, 0x10($6) #IRQ_MASK`	`lw $6, 0x10($6) #IRQ_MASK`
`jal OS_InterruptServiceRoutine`
`and $4, $4, $6`	`and $4, $4, $6`
	`jal OS_InterruptServiceRoutine`
	`addi $5, $29, 0`

`#Restore all temporary registers`	`#Restore all temporary registers`
`lw $1, 16($29) #at`	`lw $1, 16($29) #at`
`lw $2, 20($29) #v0`	`lw $2, 20($29) #v0`
`lw $3, 24($29) #v1`	`lw $3, 24($29) #v1`
Line 109...	Line 109...
`mthi $27`	`mthi $27`
`lw $27, 96($29) #lo`	`lw $27, 96($29) #lo`
`mtlo $27`	`mtlo $27`
`addi $29, $29, 104 #adjust sp`	`addi $29, $29, 104 #adjust sp`

	`isr_return:`
`ori $27, $0, 0x1 #re-enable interrupts`	`ori $27, $0, 0x1 #re-enable interrupts`
`jr $26`	`jr $26`
`mtc0 $27, $12 #STATUS=1; enable interrupts`	`mtc0 $27, $12 #STATUS=1; enable interrupts`

`.end interrupt_service_routine`	`.end interrupt_service_routine`
Line 220...	Line 221...
`jr $31`	`jr $31`
`sw $4, 0($6)`	`sw $4, 0($6)`

`.set reorder`	`.set reorder`
`.end OS_AsmMult`	`.end OS_AsmMult`


	`###################################################`
	`.globl OS_Syscall`
	`.ent OS_Syscall`
	`OS_Syscall:`
	`.set noreorder`
	`syscall 0`
	`jr $31`
	`nop`
	`.set reorder`
	`.end OS_Syscall`