projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| bafdb645 GL |
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 | ||
| 24ed8559 GL |
23 | .machine "ppc64" |
| 24 | ||
| bafdb645 GL |
25 | .text |
| 26 | ||
| 27 | /* | |
| 28 | * __system_reset_overlay - The PS3 first stage entry. | |
| 29 | * | |
| 5761eaa3 GL |
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. | |
| bafdb645 GL |
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 | |
| bafdb645 GL |
51 | beq 1f |
| 52 | ||
| 53 | /* Secondary goes to __secondary_hold in kernel. */ | |
| 54 | ||
| 55 | li r4, 0x60 | |
| 56 | mtctr r4 | |
| 57 | bctr | |
| 58 | ||
| bafdb645 | 59 | 1: |
| 5761eaa3 GL |
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 | ||
| bafdb645 GL |
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 | ||
| 5761eaa3 GL |
75 | . = __system_reset_overlay + 512 |
| 76 | ||
| bafdb645 GL |
77 | /* |
| 78 | * __system_reset_kernel - Place holder for the kernel reset vector. | |
| 79 | * | |
| 5761eaa3 | 80 | * The bootwrapper build script copies 512 bytes from offset 0x100 |
| bafdb645 | 81 | * of the rom image to the symbol __system_reset_kernel. At runtime |
| 5761eaa3 GL |
82 | * the bootwrapper program copies the 512 bytes at __system_reset_kernel |
| 83 | * to ram address 0x100. This symbol must occupy 512 bytes. | |
| bafdb645 GL |
84 | */ |
| 85 | ||
| 86 | .globl __system_reset_kernel | |
| 87 | __system_reset_kernel: | |
| 88 | ||
| 5761eaa3 | 89 | . = __system_reset_kernel + 512 |