diff --git a/arch/mips/include/asm/mach-ps2/dmac.h b/arch/mips/include/asm/mach-ps2/dmac.h
new file mode 100644
index 000000000000..30a0f72eeab3
--- /dev/null
+++ b/arch/mips/include/asm/mach-ps2/dmac.h
@@ -0,0 +1,189 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * PlayStation 2 DMA controller (DMAC)
+ *
+ * Copyright (C) 2019 Fredrik Noring
+ */
+
+/**
+ * DOC:
+ *
+ * The DMA controller handles transfers between main memory and peripheral
+ * devices or the scratch-pad RAM (SPR).
+ *
+ * The DMAC arbitrates the main bus at the same time, and supports chain
+ * mode which switches transfer addresses according to DMA tags attached to
+ * the transfer. The stall control synchronises two-channel transfers with
+ * priority control.
+ *
+ * Data is transferred in 128-bit words that must be aligned. Bus snooping
+ * is not performed.
+ */
+
+#ifndef __ASM_MACH_PS2_DMAC_H
+#define __ASM_MACH_PS2_DMAC_H
+
+#include <asm/types.h>
+
+/* Channel 0: Vector core operation unit 0 (VU0) interface (VIF0) */
+#define DMAC_VIF0_CHCR		0x10008000	/* VIF0 channel control */
+#define DMAC_VIF0_MADR		0x10008010	/* VIF0 memory address */
+#define DMAC_VIF0_QWC		0x10008020	/* VIF0 quadword count */
+#define DMAC_VIF0_TADR		0x10008030	/* VIF0 tag address */
+#define DMAC_VIF0_ASR0		0x10008040	/* VIF0 address stack 0 */
+#define DMAC_VIF0_ASR1		0x10008050	/* VIF0 address stack 1 */
+
+/* Channel 1: Vector core operation unit 1 (VU1) interface (VIF1) */
+#define DMAC_VIF1_CHCR		0x10009000	/* VIF1 channel control */
+#define DMAC_VIF1_MADR		0x10009010	/* VIF1 memory address */
+#define DMAC_VIF1_QWC		0x10009020	/* VIF1 quadword count */
+#define DMAC_VIF1_TADR		0x10009030	/* VIF1 tag address */
+#define DMAC_VIF1_ASR0		0x10009040	/* VIF1 address stack 0 */
+#define DMAC_VIF1_ASR1		0x10009050	/* VIF1 address stack 1 */
+
+/* Channel 2: Graphics Synthesizer interface (GIF) */
+#define DMAC_GIF_CHCR		0x1000a000	/* GIF channel control */
+#define DMAC_GIF_MADR		0x1000a010	/* GIF memory address */
+#define DMAC_GIF_QWC		0x1000a020	/* GIF quadword count */
+#define DMAC_GIF_TADR		0x1000a030	/* GIF tag address */
+#define DMAC_GIF_ASR0		0x1000a040	/* GIF address stack 0 */
+#define DMAC_GIF_ASR1		0x1000a050	/* GIF address stack 1 */
+
+/* Channel 3: From image processor unit (IPU) */
+#define DMAC_FIPU_CHCR		0x1000b000	/* From IPU channel control */
+#define DMAC_FIPU_MADR		0x1000b010	/* From IPU memory address */
+#define DMAC_FIPU_QWC		0x1000b020	/* From IPU quadword count */
+
+/* Channel 4: To image processor unit (IPU) */
+#define DMAC_TIPU_CHCR		0x1000b400	/* To IPU channel control */
+#define DMAC_TIPU_MADR		0x1000b410	/* To IPU memory address */
+#define DMAC_TIPU_QWC		0x1000b420	/* To IPU quadword count */
+#define DMAC_TIPU_TADR		0x1000b430	/* To IPU tag address */
+
+/* Channel 5: Sub-system interface 0 (SIF0) */
+#define DMAC_SIF0_CHCR		0x1000c000	/* SIF0 channel control */
+#define DMAC_SIF0_MADR		0x1000c010	/* SIF0 memory address */
+#define DMAC_SIF0_QWC		0x1000c020	/* SIF0 quadword count */
+
+/* Channel 6: Sub-system interface 1 (SIF1) */
+#define DMAC_SIF1_CHCR		0x1000c400	/* SIF1 channel control */
+#define DMAC_SIF1_MADR		0x1000c410	/* SIF1 memory address */
+#define DMAC_SIF1_QWC		0x1000c420	/* SIF1 quadword count */
+#define DMAC_SIF1_TADR		0x1000c430	/* SIF1 tag address */
+
+/* Channel 7: Sub-system interface 2 (SIF2) */
+#define DMAC_SIF2_CHCR		0x1000c800	/* SIF2 channel control */
+#define DMAC_SIF2_MADR		0x1000c810	/* SIF2 memory address */
+#define DMAC_SIF2_QWC		0x1000c820	/* SIF2 quadword count */
+
+/* Channel 8: From scratch-pad RAM (SPR) */
+#define DMAC_FSPR_CHCR		0x1000d000	/* From SPR channel control */
+#define DMAC_FSPR_MADR		0x1000d010	/* From SPR memory address */
+#define DMAC_FSPR_QWC		0x1000d020	/* From SPR quadword count */
+#define DMAC_FSPR_SADR		0x1000d080	/* From SPR address */
+
+/* Channel 9: To scratch-pad RAM (SPR) */
+#define DMAC_TSPR_CHCR		0x1000d400	/* To SPR channel control */
+#define DMAC_TSPR_MADR		0x1000d410	/* To SPR memory address */
+#define DMAC_TSPR_QWC		0x1000d420	/* To SPR quadword count */
+#define DMAC_TSPR_TADR		0x1000d430	/* To SPR tag address */
+#define DMAC_TSPR_SADR		0x1000d480	/* To SPR address */
+
+#define DMAC_CHCR_DIR_TOMEM	(0 << 0)	/* Direction to memory */
+#define DMAC_CHCR_DIR_FROMMEM	(1 << 0)	/* Direction from memory */
+#define DMAC_CHCR_MOD_NORMAL	(0 << 2)	/* Mode normal */
+#define DMAC_CHCR_MOD_CHAIN	(1 << 2)	/* Mode chain */
+#define DMAC_CHCR_MOD_ILEAVE	(2 << 2)	/* Mode interleave */
+#define DMAC_CHCR_ASP_NONE	(0 << 4)	/* 0 address stack pointer */
+#define DMAC_CHCR_ASP_1ADDR	(1 << 4)	/* 1 address stack pointer */
+#define DMAC_CHCR_ASP_2ADDR	(2 << 4)	/* 2 address stack pointer */
+#define DMAC_CHCR_TTE_OFF	(0 << 6)	/* Tag transfer enable off */
+#define DMAC_CHCR_TTE_ON	(1 << 6)	/* Tag transfer enable on */
+#define DMAC_CHCR_TIE_OFF	(0 << 7)	/* Tag interrupt enable off */
+#define DMAC_CHCR_TIE_ON	(1 << 7)	/* Tag interrupt enable on */
+#define DMAC_CHCR_STR_STOP	(0 << 8)	/* Stop DMA */
+#define DMAC_CHCR_STR_START	(1 << 8)	/* Start DMA */
+
+#define DMAC_CHCR_STOP		DMAC_CHCR_STR_STOP
+#define DMAC_CHCR_BUSY		DMAC_CHCR_STR_START
+#define DMAC_CHCR_SENDN		(DMAC_CHCR_DIR_FROMMEM	| \
+				 DMAC_CHCR_MOD_NORMAL	| \
+				 DMAC_CHCR_ASP_NONE	| \
+				 DMAC_CHCR_TTE_OFF	| \
+				 DMAC_CHCR_TIE_OFF	| \
+				 DMAC_CHCR_STR_START)
+#define DMAC_CHCR_SENDN_TIE	(DMAC_CHCR_DIR_FROMMEM	| \
+				 DMAC_CHCR_MOD_NORMAL	| \
+				 DMAC_CHCR_ASP_NONE	| \
+				 DMAC_CHCR_TTE_OFF	| \
+				 DMAC_CHCR_TIE_ON	| \
+				 DMAC_CHCR_STR_START)
+#define DMAC_CHCR_SENDC		(DMAC_CHCR_DIR_FROMMEM	| \
+				 DMAC_CHCR_MOD_CHAIN	| \
+				 DMAC_CHCR_ASP_NONE	| \
+				 DMAC_CHCR_TTE_OFF	| \
+				 DMAC_CHCR_TIE_OFF	| \
+				 DMAC_CHCR_STR_START)
+#define DMAC_CHCR_SENDC_TTE	(DMAC_CHCR_DIR_FROMMEM	| \
+				 DMAC_CHCR_MOD_CHAIN	| \
+				 DMAC_CHCR_ASP_NONE	| \
+				 DMAC_CHCR_TTE_ON	| \
+				 DMAC_CHCR_TIE_OFF	| \
+				 DMAC_CHCR_STR_START)
+#define DMAC_CHCR_RECVN		(DMAC_CHCR_DIR_TOMEM	| \
+				 DMAC_CHCR_MOD_NORMAL	| \
+				 DMAC_CHCR_ASP_NONE	| \
+				 DMAC_CHCR_TTE_OFF	| \
+				 DMAC_CHCR_TIE_OFF	| \
+				 DMAC_CHCR_STR_START)
+#define DMAC_CHCR_RECVC_TIE	(DMAC_CHCR_DIR_TOMEM	| \
+				 DMAC_CHCR_MOD_CHAIN	| \
+				 DMAC_CHCR_ASP_NONE	| \
+				 DMAC_CHCR_TTE_OFF	| \
+				 DMAC_CHCR_TIE_ON	| \
+				 DMAC_CHCR_STR_START)
+
+#define DMAC_CTRL	0x1000e000	/* DMAC control */
+#define DMAC_STAT	0x1000e010	/* DMAC status */
+#define DMAC_PCR	0x1000e020	/* DMAC priority control */
+#define DMAC_SQWC	0x1000e030	/* DMAC skip quadword */
+#define DMAC_RBSR	0x1000e040	/* DMAC ring buffer size */
+#define DMAC_RBOR	0x1000e050	/* DMAC ring buffer offset */
+#define DMAC_STADR	0x1000e060	/* DMAC stall address */
+
+/*
+ * The lower 16 bits are status bits and the upper 16 bits are mask bits.
+ * Status bit cleared by writing 1. Mask bits are reversed by writing 1.
+ */
+#define DMAC_STAT_MASK	0x1000e010
+
+#define DMAC_STAT_VIF0S	(1 << 0)	/* Ch0 interrupt status VIF0 */
+#define DMAC_STAT_VIF1S	(1 << 1)	/* Ch1 interrupt status VIF1 */
+#define DMAC_STAT_GIFS	(1 << 2)	/* Ch2 interrupt status GIF */
+#define DMAC_STAT_FIPUS	(1 << 3)	/* Ch3 interrupt status from IPU */
+#define DMAC_STAT_TIPUS	(1 << 4)	/* Ch4 interrupt status to IPU */
+#define DMAC_STAT_SIF0S	(1 << 5)	/* Ch5 interrupt status SIF0 */
+#define DMAC_STAT_SIF1S	(1 << 6)	/* Ch6 interrupt status SIF1 */
+#define DMAC_STAT_SIF2S	(1 << 7)	/* Ch7 interrupt status SIF2 */
+#define DMAC_STAT_FSPRS	(1 << 8)	/* Ch8 interrupt status from SPR */
+#define DMAC_STAT_TSPRS	(1 << 9)	/* Ch9 interrupt status to SPR */
+#define DMAC_STAT_SIS	(1 << 13)	/* DMA stall interrupt status */
+#define DMAC_STAT_MEIS	(1 << 14)	/* MFIFO empty interrupt status */
+#define DMAC_STAT_BEIS	(1 << 15)	/* BUSERR interrupt status */
+#define DMAC_STAT_VIF0M	(1 << 16)	/* Ch0 interrupt mask VIF0 */
+#define DMAC_STAT_VIF1M	(1 << 17)	/* Ch1 interrupt mask VIF1 */
+#define DMAC_STAT_GIFM	(1 << 18)	/* Ch2 interrupt mask GIF */
+#define DMAC_STAT_FIPUM	(1 << 19)	/* Ch3 interrupt mask from IPU */
+#define DMAC_STAT_TIPUM	(1 << 20)	/* Ch4 interrupt mask to IPU */
+#define DMAC_STAT_SIF0M	(1 << 21)	/* Ch5 interrupt mask SIF0 */
+#define DMAC_STAT_SIF1M	(1 << 22)	/* Ch6 interrupt mask SIF1 */
+#define DMAC_STAT_SIF2M	(1 << 23)	/* Ch7 interrupt mask SIF2 */
+#define DMAC_STAT_FSPRM	(1 << 24)	/* Ch8 interrupt mask from SPR */
+#define DMAC_STAT_TSPRM	(1 << 25)	/* Ch9 interrupt mask to SPR */
+#define DMAC_STAT_SIM	(1 << 29)	/* DMA stall interrupt mask */
+#define DMAC_STAT_MEIM	(1 << 30)	/* MFIFO empty interrupt mask */
+
+#define DMAC_ENABLER	0x1000f520	/* Acquisition of DMA suspend status */
+#define DMAC_ENABLEW	0x1000f590	/* DMA suspend control */
+
+#endif /* __ASM_MACH_PS2_DMAC_H */
