powerpc/boot/gamecube-head.S

1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3  * arch/powerpc/boot/gamecube-head.S
6  * Copyright (C) 2004-2009 The GameCube Linux Team
14  * - if the data and instruction caches are enabled or not
15  * - if the MMU is enabled or not
27 	mfmsr	9
28 	rlwinm	9, 9, 0, ~((1<<4)|(1<<5)) /* MSR_DR|MSR_IR */
29 	bcl	20, 31, 1f
30 1:
33 	addi	8, 8, _mmu_off - 1b
35 	mtsrr1	9
53 	li	9, 0x0002	/* rw */
54 	mtspr	0x211, 9	/* IBAT0L */
56 	mtspr	0x219, 9	/* DBAT0L */
61 	lis	9, 0x0c00
62 	ori	9, 9, 0x002a	/* uncached, guarded, rw */
63 	mtspr	0x21b, 9	/* DBAT1L */
68 	lis	9, 0x0100
69 	ori	9, 9, 0x0002	/* rw */
70 	mtspr	0x215, 9	/* IBAT2L */
72 	mtspr	0x21d, 9	/* DBAT2L */
77 	andi.	0, 8, (1<<15)		/* HID0_ICE */
78 	bne	1f
79 	ori	8, 8, (1<<15)|(1<<11)	/* HID0_ICE|HID0_ICFI*/
80 1:
81 	andi.	0, 8, (1<<14)		/* HID0_DCE */
82 	bne	1f
83 	ori	8, 8, (1<<14)|(1<<10)	/* HID0_DCE|HID0_DCFI*/
84 1:
94 	bcl	20, 31, 1f
95 1:
97 	addi	8, 8, _mmu_on - 1b
98 	mfmsr	9
99 	ori	9, 9, (1<<4)|(1<<5) /* MSR_DR|MSR_IR */
101 	mtsrr1	9