projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| f615136c MF |
1 | /* |
| 2 | * Xtensa Secondary Processors startup code. | |
| 3 | * | |
| 4 | * This file is subject to the terms and conditions of the GNU General Public | |
| 5 | * License. See the file "COPYING" in the main directory of this archive | |
| 6 | * for more details. | |
| 7 | * | |
| 8 | * Copyright (C) 2001 - 2013 Tensilica Inc. | |
| 9 | * | |
| 10 | * Joe Taylor <joe@tensilica.com> | |
| 11 | * Chris Zankel <chris@zankel.net> | |
| 12 | * Marc Gauthier <marc@tensilica.com, marc@alumni.uwaterloo.ca> | |
| 13 | * Pete Delaney <piet@tensilica.com> | |
| 14 | */ | |
| 15 | ||
| 16 | #include <linux/linkage.h> | |
| 17 | ||
| 18 | #include <asm/cacheasm.h> | |
| 19 | #include <asm/initialize_mmu.h> | |
| 20 | #include <asm/mxregs.h> | |
| 21 | #include <asm/regs.h> | |
| 22 | ||
| 23 | ||
| 24 | .section .SecondaryResetVector.text, "ax" | |
| 25 | ||
| 26 | ||
| 27 | ENTRY(_SecondaryResetVector) | |
| 28 | _j _SetupOCD | |
| 29 | ||
| 30 | .begin no-absolute-literals | |
| 31 | .literal_position | |
| 32 | ||
| 33 | _SetupOCD: | |
| 34 | /* | |
| 35 | * Initialize WB, WS, and clear PS.EXCM (to allow loop instructions). | |
| 36 | * Set Interrupt Level just below XCHAL_DEBUGLEVEL to allow | |
| 37 | * xt-gdb to single step via DEBUG exceptions received directly | |
| 38 | * by ocd. | |
| 39 | */ | |
| 40 | movi a1, 1 | |
| 41 | movi a0, 0 | |
| 42 | wsr a1, windowstart | |
| 43 | wsr a0, windowbase | |
| 44 | rsync | |
| 45 | ||
| 46 | movi a1, LOCKLEVEL | |
| 47 | wsr a1, ps | |
| 48 | rsync | |
| 49 | ||
| 50 | _SetupMMU: | |
| f615136c MF |
51 | #ifdef CONFIG_INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX |
| 52 | initialize_mmu | |
| 53 | #endif | |
| 54 | ||
| 55 | /* | |
| 56 | * Start Secondary Processors with NULL pointer to boot params. | |
| 57 | */ | |
| 58 | movi a2, 0 # a2 == NULL | |
| 59 | movi a3, _startup | |
| 60 | jx a3 | |
| 61 | ||
| 62 | .end no-absolute-literals |