peripheral_test_memory_asm.s

包括基于Cyclone1C20芯片NiosII软件开发的各种模块的测试例子

; file: peripheral_test_memory_asm.s



	.include "excalibur.s"


	.global DoRapidPeripheralWrites
	.global Do1000STs

DoRapidPeripheralWrites:

	SAVE	%sp,-23

	nm_println "This test executes a very series of instructions"
	nm_println "consisting many many tiny UART transmit loops. It"
	nm_println "polls the UART about as fast as possible."

	nm_println "About to print 60 x 10 block of dots."

	MOVIA	%l0,na_uart1
	MOVIP	%l1,'.'
	MOVIP	%l2,13

	.macro emitChar regWithChar
emitCharLoop\@:
    PFXIO 0
	LDP	%l3,[%l0,np_uartstatus]
	IF0	%l3,6
	 BR	emitCharLoop\@
	NOP
	STP	[%l0,np_uarttxdata],\regWithChar
	.endm

	.macro emit10Dots
	emitChar	%l1
	emitChar	%l1
	emitChar	%l1
	emitChar	%l1
	emitChar	%l1
	emitChar	%l1
	emitChar	%l1
	emitChar	%l1
	emitChar	%l1
	emitChar	%l1
	.endm

	.macro emit60DotsAndCR
	emit10Dots
	emit10Dots
	emit10Dots
	emit10Dots
	emit10Dots
	emit10Dots
	emitChar	%l2
	.endm

	emit60DotsAndCR
	emit60DotsAndCR
	emit60DotsAndCR
	emit60DotsAndCR
	emit60DotsAndCR
	emit60DotsAndCR
	emit60DotsAndCR
	emit60DotsAndCR
	emit60DotsAndCR
	emit60DotsAndCR

	nm_println "How does that look?"

	RESTRET

Do1000STs:

	;
	; Use macros to include 1000 ST's.
	;

	.macro ST10 r1,r2
	ST	[%r1],%r2
	ST	[%r1],%r2
	ST	[%r1],%r2
	ST	[%r1],%r2
	ST	[%r1],%r2
	ST	[%r1],%r2
	ST	[%r1],%r2
	ST	[%r1],%r2
	ST	[%r1],%r2
	ST	[%r1],%r2
	.endm

	.macro	ST100 r1,r2
	ST10	\r1,\r2
	ST10	\r1,\r2
	ST10	\r1,\r2
	ST10	\r1,\r2
	ST10	\r1,\r2
	ST10	\r1,\r2
	ST10	\r1,\r2
	ST10	\r1,\r2
	ST10	\r1,\r2
	ST10	\r1,\r2
	.endm

	.macro	ST1000 r1,r2
	ST100	\r1,\r2
	ST100	\r1,\r2
	ST100	\r1,\r2
	ST100	\r1,\r2
	ST100	\r1,\r2
	ST100	\r1,\r2
	ST100	\r1,\r2
	ST100	\r1,\r2
	ST100	\r1,\r2
	ST100	\r1,\r2
	.endm

	PFX	%hi(0x60000)
	MOVI	%g4,%lo(0x60000)
	PFX	%xhi(0x60000)
	MOVI	%g4,%xlo(0x60000)
	LD	%g5,[%g4]		; ensure we're not actually changing memory

	ST1000 %g4,%g5
	;ST10 %g4,%g5

	JMP	%o7
	NOP