| Geoff Levand | bafdb64 | 2007-07-04 09:07:18 +1000 | [diff] [blame] | 1 | /* |
| 2 | * PS3 bootwrapper entry. |
| 3 | * |
| 4 | * Copyright (C) 2007 Sony Computer Entertainment Inc. |
| 5 | * Copyright 2007 Sony Corp. |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; version 2 of the License. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | */ |
| 20 | |
| 21 | #include "ppc_asm.h" |
| 22 | |
| Geoff Levand | 24ed855 | 2007-07-21 04:37:49 -0700 | [diff] [blame] | 23 | .machine "ppc64" |
| 24 | |
| Geoff Levand | bafdb64 | 2007-07-04 09:07:18 +1000 | [diff] [blame] | 25 | .text |
| 26 | |
| 27 | /* |
| 28 | * __system_reset_overlay - The PS3 first stage entry. |
| 29 | * |
| Geoff Levand | 5761eaa | 2008-03-28 07:41:45 +1100 | [diff] [blame] | 30 | * The bootwraper build script copies the 512 bytes at symbol |
| 31 | * __system_reset_overlay to offset 0x100 of the rom image. This symbol |
| 32 | * must occupy 512 or less bytes. |
| Geoff Levand | bafdb64 | 2007-07-04 09:07:18 +1000 | [diff] [blame] | 33 | * |
| 34 | * The PS3 has a single processor with two threads. |
| 35 | */ |
| 36 | |
| 37 | .globl __system_reset_overlay |
| 38 | __system_reset_overlay: |
| 39 | |
| 40 | /* Switch to 32-bit mode. */ |
| 41 | |
| 42 | mfmsr r9 |
| 43 | clrldi r9,r9,1 |
| 44 | mtmsrd r9 |
| 45 | nop |
| 46 | |
| 47 | /* Get thread number in r3 and branch. */ |
| 48 | |
| 49 | mfspr r3, 0x88 |
| 50 | cntlzw. r3, r3 |
| Geoff Levand | bafdb64 | 2007-07-04 09:07:18 +1000 | [diff] [blame] | 51 | beq 1f |
| 52 | |
| 53 | /* Secondary goes to __secondary_hold in kernel. */ |
| 54 | |
| 55 | li r4, 0x60 |
| 56 | mtctr r4 |
| 57 | bctr |
| 58 | |
| Geoff Levand | bafdb64 | 2007-07-04 09:07:18 +1000 | [diff] [blame] | 59 | 1: |
| Geoff Levand | 5761eaa | 2008-03-28 07:41:45 +1100 | [diff] [blame] | 60 | /* Save the value at addr zero for a null pointer write check later. */ |
| 61 | |
| 62 | li r4, 0 |
| 63 | lwz r3, 0(r4) |
| 64 | |
| 65 | /* Primary delays then goes to _zimage_start in wrapper. */ |
| 66 | |
| Geoff Levand | bafdb64 | 2007-07-04 09:07:18 +1000 | [diff] [blame] | 67 | or 31, 31, 31 /* db16cyc */ |
| 68 | or 31, 31, 31 /* db16cyc */ |
| 69 | |
| 70 | lis r4, _zimage_start@ha |
| 71 | addi r4, r4, _zimage_start@l |
| 72 | mtctr r4 |
| 73 | bctr |
| 74 | |
| Geoff Levand | 5761eaa | 2008-03-28 07:41:45 +1100 | [diff] [blame] | 75 | . = __system_reset_overlay + 512 |
| 76 | |
| Geoff Levand | bafdb64 | 2007-07-04 09:07:18 +1000 | [diff] [blame] | 77 | /* |
| 78 | * __system_reset_kernel - Place holder for the kernel reset vector. |
| 79 | * |
| Geoff Levand | 5761eaa | 2008-03-28 07:41:45 +1100 | [diff] [blame] | 80 | * The bootwrapper build script copies 512 bytes from offset 0x100 |
| Geoff Levand | bafdb64 | 2007-07-04 09:07:18 +1000 | [diff] [blame] | 81 | * of the rom image to the symbol __system_reset_kernel. At runtime |
| Geoff Levand | 5761eaa | 2008-03-28 07:41:45 +1100 | [diff] [blame] | 82 | * the bootwrapper program copies the 512 bytes at __system_reset_kernel |
| 83 | * to ram address 0x100. This symbol must occupy 512 bytes. |
| Geoff Levand | bafdb64 | 2007-07-04 09:07:18 +1000 | [diff] [blame] | 84 | */ |
| 85 | |
| 86 | .globl __system_reset_kernel |
| 87 | __system_reset_kernel: |
| 88 | |
| Geoff Levand | 5761eaa | 2008-03-28 07:41:45 +1100 | [diff] [blame] | 89 | . = __system_reset_kernel + 512 |