shithub: riscv

Info  •  Files  •  Log  •  Branches

zynq: enable prefetch hints and drop-prefetch

--- a/sys/src/9/zynq/l.s

+++ b/sys/src/9/zynq/l.s

@@ -93,7 +93,7 @@

 	MCR 15, 0, R0, C(7), C(5), 6

 	BL l1dclear(SB)

 	MRC 15, 0, R0, C(1), C(0), 1

-	ORR $(1|1<<6), R0

+	ORR $(1|2|1<<6), R0

 	MCR 15, 0, R0, C(1), C(0), 1

 	MRC 15, 0, R0, C(1), C(0), 0

 	ORR $(1<<12|1<<2), R0

@@ -100,7 +100,7 @@

 	MCR 15, 0, R0, C(1), C(0), 0

 	DSB

 	ISB

-	

+

 	MOVW $(VMAP+0x30), R8

 	PUTC('9')

--- a/sys/src/9/zynq/main.c

+++ b/sys/src/9/zynq/main.c

@@ -112,7 +112,7 @@

 	l2[CTRL] &= ~1;

 	l2[TAGRAM] = l2[TAGRAM] & ~0x777 | 0x111;

 	l2[DATARAM] = l2[DATARAM] & ~0x777 | 0x121;

-	l2[PREFETCH] |= 3<<28;

+	l2[PREFETCH] |= 3<<28 | 1<<24;

 	l2[AUX] |= 3<<28 | 1<<20;

 	l2[INVWAY] = 0xff;

 	while((l2[INVPA] & 1) != 0)