| Becky Bruce | 1266df8 | 2008-11-03 15:44:01 -0600 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2004, 2007, 2008 Freescale Semiconductor. |
| 3 | * Srikanth Srinivasan <srikanth.srinivaan@freescale.com> |
| 4 | * |
| Wolfgang Denk | 1a45966 | 2013-07-08 09:37:19 +0200 | [diff] [blame] | 5 | * SPDX-License-Identifier: GPL-2.0+ |
| Becky Bruce | 1266df8 | 2008-11-03 15:44:01 -0600 | [diff] [blame] | 6 | */ |
| 7 | #include <config.h> |
| 8 | #include <mpc86xx.h> |
| Becky Bruce | 1266df8 | 2008-11-03 15:44:01 -0600 | [diff] [blame] | 9 | |
| 10 | #include <ppc_asm.tmpl> |
| 11 | #include <ppc_defs.h> |
| 12 | |
| 13 | #include <asm/cache.h> |
| 14 | #include <asm/mmu.h> |
| 15 | |
| 16 | /* If this is a multi-cpu system then we need to handle the |
| 17 | * 2nd cpu. The assumption is that the 2nd cpu is being |
| 18 | * held in boot holdoff mode until the 1st cpu unlocks it |
| 19 | * from Linux. We'll do some basic cpu init and then pass |
| 20 | * it to the Linux Reset Vector. |
| 21 | * Sri: Much of this initialization is not required. Linux |
| 22 | * rewrites the bats, and the sprs and also enables the L1 cache. |
| 23 | * |
| 24 | * Core 0 must copy this to a 1M aligned region and set BPTR |
| 25 | * to point to it. |
| 26 | */ |
| Becky Bruce | 1266df8 | 2008-11-03 15:44:01 -0600 | [diff] [blame] | 27 | .align 12 |
| 28 | .globl __secondary_start_page |
| 29 | __secondary_start_page: |
| 30 | .space 0x100 /* space over to reset vector loc */ |
| 31 | mfspr r0, MSSCR0 |
| 32 | andi. r0, r0, 0x0020 |
| 33 | rlwinm r0,r0,27,31,31 |
| 34 | mtspr PIR, r0 |
| 35 | |
| 36 | /* Invalidate BATs */ |
| 37 | li r0, 0 |
| 38 | mtspr IBAT0U, r0 |
| 39 | mtspr IBAT1U, r0 |
| 40 | mtspr IBAT2U, r0 |
| 41 | mtspr IBAT3U, r0 |
| 42 | mtspr IBAT4U, r0 |
| 43 | mtspr IBAT5U, r0 |
| 44 | mtspr IBAT6U, r0 |
| 45 | mtspr IBAT7U, r0 |
| 46 | isync |
| 47 | mtspr DBAT0U, r0 |
| 48 | mtspr DBAT1U, r0 |
| 49 | mtspr DBAT2U, r0 |
| 50 | mtspr DBAT3U, r0 |
| 51 | mtspr DBAT4U, r0 |
| 52 | mtspr DBAT5U, r0 |
| 53 | mtspr DBAT6U, r0 |
| 54 | mtspr DBAT7U, r0 |
| 55 | isync |
| 56 | sync |
| 57 | |
| 58 | /* enable extended addressing */ |
| 59 | mfspr r0, HID0 |
| 60 | lis r0, (HID0_HIGH_BAT_EN | HID0_XBSEN | HID0_XAEN)@h |
| 61 | ori r0, r0, (HID0_HIGH_BAT_EN | HID0_XBSEN | HID0_XAEN)@l |
| 62 | mtspr HID0, r0 |
| 63 | sync |
| 64 | isync |
| 65 | |
| 66 | #ifdef CONFIG_SYS_L2 |
| 67 | /* init the L2 cache */ |
| 68 | addis r3, r0, L2_INIT@h |
| 69 | ori r3, r3, L2_INIT@l |
| 70 | sync |
| 71 | mtspr l2cr, r3 |
| 72 | #ifdef CONFIG_ALTIVEC |
| 73 | dssall |
| 74 | #endif |
| 75 | /* invalidate the L2 cache */ |
| 76 | mfspr r3, l2cr |
| 77 | rlwinm. r3, r3, 0, 0, 0 |
| 78 | beq 1f |
| 79 | |
| 80 | mfspr r3, l2cr |
| 81 | rlwinm r3, r3, 0, 1, 31 |
| 82 | |
| 83 | #ifdef CONFIG_ALTIVEC |
| 84 | dssall |
| 85 | #endif |
| 86 | sync |
| 87 | mtspr l2cr, r3 |
| 88 | sync |
| 89 | 1: mfspr r3, l2cr |
| 90 | oris r3, r3, L2CR_L2I@h |
| 91 | mtspr l2cr, r3 |
| 92 | |
| 93 | invl2: |
| 94 | mfspr r3, l2cr |
| 95 | andis. r3, r3, L2CR_L2I@h |
| 96 | bne invl2 |
| 97 | sync |
| 98 | #endif |
| 99 | |
| 100 | /* enable and invalidate the data cache */ |
| 101 | mfspr r3, HID0 |
| 102 | li r5, HID0_DCFI|HID0_DLOCK |
| 103 | andc r3, r3, r5 |
| 104 | mtspr HID0, r3 /* no invalidate, unlock */ |
| 105 | ori r3, r3, HID0_DCE |
| 106 | ori r5, r3, HID0_DCFI |
| 107 | mtspr HID0, r5 /* enable + invalidate */ |
| 108 | mtspr HID0, r3 /* enable */ |
| 109 | sync |
| Jean-Christophe PLAGNIOL-VILLARD | 3aed3aa | 2008-12-14 10:29:39 +0100 | [diff] [blame] | 110 | #ifdef CONFIG_SYS_L2 |
| Becky Bruce | 1266df8 | 2008-11-03 15:44:01 -0600 | [diff] [blame] | 111 | sync |
| 112 | lis r3, L2_ENABLE@h |
| 113 | ori r3, r3, L2_ENABLE@l |
| 114 | mtspr l2cr, r3 |
| 115 | isync |
| 116 | sync |
| 117 | #endif |
| 118 | |
| 119 | /* enable and invalidate the instruction cache*/ |
| 120 | mfspr r3, HID0 |
| 121 | li r5, HID0_ICFI|HID0_ILOCK |
| 122 | andc r3, r3, r5 |
| 123 | ori r3, r3, HID0_ICE |
| 124 | ori r5, r3, HID0_ICFI |
| 125 | mtspr HID0, r5 |
| 126 | mtspr HID0, r3 |
| 127 | isync |
| 128 | sync |
| 129 | |
| 130 | /* TBEN in HID0 */ |
| 131 | mfspr r4, HID0 |
| 132 | oris r4, r4, 0x0400 |
| 133 | mtspr HID0, r4 |
| 134 | sync |
| 135 | isync |
| 136 | |
| 137 | /* MCP|SYNCBE|ABE in HID1 */ |
| 138 | mfspr r4, HID1 |
| 139 | oris r4, r4, 0x8000 |
| 140 | ori r4, r4, 0x0C00 |
| 141 | mtspr HID1, r4 |
| 142 | sync |
| 143 | isync |
| 144 | |
| 145 | lis r3, CONFIG_LINUX_RESET_VEC@h |
| 146 | ori r3, r3, CONFIG_LINUX_RESET_VEC@l |
| 147 | mtlr r3 |
| 148 | blr |
| 149 | |
| 150 | /* Never Returns, Running in Linux Now */ |