| 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
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| 2 | /* |
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| 3 | * PS3 bootwrapper entry. |
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| 4 | * |
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| 5 | * Copyright (C) 2007 Sony Computer Entertainment Inc. |
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| 6 | * Copyright 2007 Sony Corp. |
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| 7 | */ |
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| 8 | |
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| 9 | #include "ppc_asm.h" |
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| 10 | |
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| 11 | .machine "ppc64" |
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| 12 | |
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| 13 | .text |
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| 14 | |
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| 15 | /* |
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| 16 | * __system_reset_overlay - The PS3 first stage entry. |
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| 17 | * |
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| 18 | * The bootwraper build script copies the 512 bytes at symbol |
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| 19 | * __system_reset_overlay to offset 0x100 of the rom image. This symbol |
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| 20 | * must occupy 512 or less bytes. |
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| 21 | * |
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| 22 | * The PS3 has a single processor with two threads. |
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| 23 | */ |
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| 24 | |
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| 25 | .globl __system_reset_overlay |
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| 26 | __system_reset_overlay: |
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| 27 | |
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| 28 | /* Switch to 32-bit mode. */ |
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| 29 | |
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| 30 | mfmsr r9 |
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| 31 | clrldi r9,r9,1 |
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| 32 | mtmsrd r9 |
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| 33 | nop |
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| 34 | |
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| 35 | /* Get thread number in r3 and branch. */ |
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| 36 | |
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| 37 | mfspr r3, 0x88 |
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| 38 | cntlzw. r3, r3 |
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| 39 | beq 1f |
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| 40 | |
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| 41 | /* Secondary goes to __secondary_hold in kernel. */ |
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| 42 | |
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| 43 | li r4, 0x60 |
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| 44 | mtctr r4 |
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| 45 | bctr |
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| 46 | |
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| 47 | 1: |
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| 48 | /* Primary delays then goes to _zimage_start in wrapper. */ |
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| 49 | |
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| 50 | or 31, 31, 31 /* db16cyc */ |
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| 51 | or 31, 31, 31 /* db16cyc */ |
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| 52 | |
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| 53 | lis r4, _zimage_start@ha |
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| 54 | addi r4, r4, _zimage_start@l |
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| 55 | mtctr r4 |
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| 56 | bctr |
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| 57 | |
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| 58 | . = __system_reset_overlay + 512 |
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| 59 | |
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| 60 | /* |
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| 61 | * __system_reset_kernel - Place holder for the kernel reset vector. |
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| 62 | * |
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| 63 | * The bootwrapper build script copies 512 bytes from offset 0x100 |
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| 64 | * of the rom image to the symbol __system_reset_kernel. At runtime |
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| 65 | * the bootwrapper program copies the 512 bytes at __system_reset_kernel |
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| 66 | * to ram address 0x100. This symbol must occupy 512 bytes. |
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| 67 | */ |
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| 68 | |
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| 69 | .globl __system_reset_kernel |
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| 70 | __system_reset_kernel: |
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| 71 | |
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| 72 | . = __system_reset_kernel + 512 |
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| 73 | |
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