| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| 2 | /* |
| 3 | * PS3 bootwrapper entry. |
| 4 | * |
| 5 | * Copyright (C) 2007 Sony Computer Entertainment Inc. |
| 6 | * Copyright 2007 Sony Corp. |
| 7 | */ |
| 8 | |
| 9 | #include "ppc_asm.h" |
| 10 | |
| 11 | .machine "ppc64" |
| 12 | |
| 13 | .text |
| 14 | |
| 15 | /* |
| 16 | * __system_reset_overlay - The PS3 first stage entry. |
| 17 | * |
| 18 | * The bootwraper build script copies the 512 bytes at symbol |
| 19 | * __system_reset_overlay to offset 0x100 of the rom image. This symbol |
| 20 | * must occupy 512 or less bytes. |
| 21 | * |
| 22 | * The PS3 has a single processor with two threads. |
| 23 | */ |
| 24 | |
| 25 | .globl __system_reset_overlay |
| 26 | __system_reset_overlay: |
| 27 | |
| 28 | /* Switch to 32-bit mode. */ |
| 29 | |
| 30 | mfmsr r9 |
| 31 | clrldi r9,r9,1 |
| 32 | mtmsrd r9 |
| 33 | nop |
| 34 | |
| 35 | /* Get thread number in r3 and branch. */ |
| 36 | |
| 37 | mfspr r3, 0x88 |
| 38 | cntlzw. r3, r3 |
| 39 | beq 1f |
| 40 | |
| 41 | /* Secondary goes to __secondary_hold in kernel. */ |
| 42 | |
| 43 | li r4, 0x60 |
| 44 | mtctr r4 |
| 45 | bctr |
| 46 | |
| 47 | 1: |
| 48 | /* Primary delays then goes to _zimage_start in wrapper. */ |
| 49 | |
| 50 | or 31, 31, 31 /* db16cyc */ |
| 51 | or 31, 31, 31 /* db16cyc */ |
| 52 | |
| 53 | lis r4, _zimage_start@ha |
| 54 | addi r4, r4, _zimage_start@l |
| 55 | mtctr r4 |
| 56 | bctr |
| 57 | |
| 58 | . = __system_reset_overlay + 512 |
| 59 | |
| 60 | /* |
| 61 | * __system_reset_kernel - Place holder for the kernel reset vector. |
| 62 | * |
| 63 | * The bootwrapper build script copies 512 bytes from offset 0x100 |
| 64 | * of the rom image to the symbol __system_reset_kernel. At runtime |
| 65 | * the bootwrapper program copies the 512 bytes at __system_reset_kernel |
| 66 | * to ram address 0x100. This symbol must occupy 512 bytes. |
| 67 | */ |
| 68 | |
| 69 | .globl __system_reset_kernel |
| 70 | __system_reset_kernel: |
| 71 | |
| 72 | . = __system_reset_kernel + 512 |