powerpc/boot/wii-head.S

1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3  * arch/powerpc/boot/wii-head.S
6  * Copyright (C) 2008-2009 The GameCube Linux Team
14  * - if the data and instruction caches are enabled or not
15  * - if the MMU is enabled or not
16  * - if the high BATs are enabled or not
28 	mfmsr	9
29 	rlwinm	9, 9, 0, ~((1<<4)|(1<<5)) /* MSR_DR|MSR_IR */
30 	bcl	20, 31, 1f
31 1:
34 	addi	8, 8, _mmu_off - 1b
36 	mtsrr1	9
63 	li	9, 0x0002	/* rw */
64 	mtspr	0x211, 9	/* IBAT0L */
66 	mtspr	0x219, 9	/* DBAT0L */
71 	lis	9, 0x0c00
72 	ori	9, 9, 0x002a	/* uncached, guarded, rw */
73 	mtspr	0x21b, 9	/* DBAT1L */
78 	lis	9, 0x0100
79 	ori	9, 9, 0x0002	/* rw */
80 	mtspr	0x215, 9	/* IBAT2L */
82 	mtspr	0x21d, 9	/* DBAT2L */
87 	lis	9, 0x1000
88 	ori	9, 9, 0x0002	/* rw */
90 	mtspr	0x217, 9	/* IBAT3L */
92 	mtspr	0x21f, 9	/* DBAT3L */
101 	andi.	0, 8, (1<<15)		/* HID0_ICE */
102 	bne	1f
103 	ori	8, 8, (1<<15)|(1<<11)	/* HID0_ICE|HID0_ICFI*/
104 1:
105 	andi.	0, 8, (1<<14)		/* HID0_DCE */
106 	bne	1f
107 	ori	8, 8, (1<<14)|(1<<10)	/* HID0_DCE|HID0_DCFI*/
108 1:
118 	bcl	20, 31, 1f
119 1:
121 	addi	8, 8, _mmu_on - 1b
122 	mfmsr	9
123 	ori	9, 9, (1<<4)|(1<<5) /* MSR_DR|MSR_IR */
125 	mtsrr1	9
132 	lwz	9, 0(8)
133 	ori	9, 9, 0x20
134 	stw	9, 0(8)