From: kettenis <kettenis@openbsd.org>
Date: Mon, 6 Jun 2022 10:50:56 +0000 (+0000)
Subject: The StarFive JH7100 SoC has peripherals that only support 32-bit DMA
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=c4eb6273a63be35f1138434c92dd98260616aa88;p=openbsd

The StarFive JH7100 SoC has peripherals that only support 32-bit DMA
(in particular the dwmmc(4) and dwge(4) devices; there may be more).

ok jsg@
---

diff --git a/sys/arch/riscv64/stand/efiboot/efiboot.c b/sys/arch/riscv64/stand/efiboot/efiboot.c
index 561bf6952ca..fc94f6fd19f 100644
--- a/sys/arch/riscv64/stand/efiboot/efiboot.c
+++ b/sys/arch/riscv64/stand/efiboot/efiboot.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: efiboot.c,v 1.4 2022/03/22 10:33:50 kettenis Exp $	*/
+/*	$OpenBSD: efiboot.c,v 1.5 2022/06/06 10:50:56 kettenis Exp $	*/
 
 /*
  * Copyright (c) 2015 YASUOKA Masahiko <yasuoka@yasuoka.net>
@@ -466,10 +466,10 @@ efi_dma_constraint(void)
 {
 	void *node;
 
-	/* Raspberry Pi 4 is "special". */
+	/* StarFive JH7100 has peripherals that only support 32-bit DMA. */
 	node = fdt_find_node("/");
-	if (fdt_node_is_compatible(node, "brcm,bcm2711"))
-		dma_constraint[1] = htobe64(0x3bffffff);
+	if (fdt_node_is_compatible(node, "starfive,jh7100"))
+		dma_constraint[1] = htobe64(0xffffffff);
 
 	/* Pass DMA constraint. */
 	node = fdt_find_node("/chosen");