projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| e85e335f MF |
1 | /* |
| 2 | * arch/xtensa/boot/boot-elf/bootstrap.S | |
| 3 | * | |
| 4 | * Low-level exception handling | |
| 5 | * | |
| 6 | * This file is subject to the terms and conditions of the GNU General Public | |
| 7 | * License. See the file "COPYING" in the main directory of this archive | |
| 8 | * for more details. | |
| 9 | * | |
| 10 | * Copyright (C) 2004 - 2013 by Tensilica Inc. | |
| 11 | * | |
| 12 | * Chris Zankel <chris@zankel.net> | |
| 13 | * Marc Gauthier <marc@tensilica.com> | |
| 14 | * Piet Delaney <piet@tensilica.com> | |
| 15 | */ | |
| 4bedea94 | 16 | |
| 4bedea94 | 17 | #include <asm/bootparam.h> |
| e85e335f MF |
18 | #include <asm/processor.h> |
| 19 | #include <asm/pgtable.h> | |
| 20 | #include <asm/page.h> | |
| 21 | #include <asm/cacheasm.h> | |
| 22 | #include <asm/initialize_mmu.h> | |
| ccd0ef38 | 23 | #include <asm/vectors.h> |
| e85e335f | 24 | #include <linux/linkage.h> |
| 4bedea94 | 25 | |
| e85e335f | 26 | .section .ResetVector.text, "ax" |
| 4bedea94 | 27 | .global _ResetVector |
| e85e335f MF |
28 | .global reset |
| 29 | ||
| 4bedea94 | 30 | _ResetVector: |
| e85e335f MF |
31 | _j _SetupMMU |
| 32 | ||
| 33 | .begin no-absolute-literals | |
| 34 | .literal_position | |
| 35 | ||
| 4bedea94 CZ |
36 | .align 4 |
| 37 | RomInitAddr: | |
| a9f2fc62 MF |
38 | #if defined(CONFIG_INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX) && \ |
| 39 | XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY | |
| 40 | .word CONFIG_KERNEL_LOAD_ADDRESS | |
| 41 | #else | |
| 42 | .word KERNELOFFSET | |
| 43 | #endif | |
| 4bedea94 CZ |
44 | RomBootParam: |
| 45 | .word _bootparam | |
| e85e335f MF |
46 | _bootparam: |
| 47 | .short BP_TAG_FIRST | |
| 48 | .short 4 | |
| 49 | .long BP_VERSION | |
| 50 | .short BP_TAG_LAST | |
| 51 | .short 0 | |
| 52 | .long 0 | |
| 53 | ||
| 54 | .align 4 | |
| 55 | _SetupMMU: | |
| 56 | movi a0, 0 | |
| 57 | wsr a0, windowbase | |
| 58 | rsync | |
| 59 | movi a0, 1 | |
| 60 | wsr a0, windowstart | |
| 61 | rsync | |
| 62 | movi a0, 0x1F | |
| 63 | wsr a0, ps | |
| 64 | rsync | |
| 65 | ||
| e85e335f MF |
66 | #ifndef CONFIG_INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX |
| 67 | initialize_mmu | |
| 68 | #endif | |
| 69 | ||
| 70 | .end no-absolute-literals | |
| 71 | ||
| 72 | rsil a0, XCHAL_DEBUGLEVEL-1 | |
| 73 | rsync | |
| 4bedea94 CZ |
74 | reset: |
| 75 | l32r a0, RomInitAddr | |
| 76 | l32r a2, RomBootParam | |
| 77 | movi a3, 0 | |
| 78 | movi a4, 0 | |
| 79 | jx a0 |