| Haavard Skinnemoen | 5f97f7f | 2006-09-25 23:32:13 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Non-board-specific low-level startup code |
| 3 | * |
| 4 | * Copyright (C) 2004-2006 Atmel Corporation |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License version 2 as |
| 8 | * published by the Free Software Foundation. |
| 9 | */ |
| 10 | #include <linux/linkage.h> |
| 11 | |
| 12 | #include <asm/page.h> |
| 13 | #include <asm/thread_info.h> |
| 14 | #include <asm/sysreg.h> |
| 15 | |
| 16 | .section .init.text,"ax" |
| 17 | .global kernel_entry |
| 18 | kernel_entry: |
| 19 | /* Initialize status register */ |
| 20 | lddpc r0, init_sr |
| 21 | mtsr SYSREG_SR, r0 |
| 22 | |
| 23 | /* Set initial stack pointer */ |
| 24 | lddpc sp, stack_addr |
| 25 | sub sp, -THREAD_SIZE |
| 26 | |
| 27 | #ifdef CONFIG_FRAME_POINTER |
| 28 | /* Mark last stack frame */ |
| 29 | mov lr, 0 |
| 30 | mov r7, 0 |
| 31 | #endif |
| 32 | |
| Haavard Skinnemoen | 5f97f7f | 2006-09-25 23:32:13 -0700 | [diff] [blame] | 33 | /* Start the show */ |
| 34 | lddpc pc, kernel_start_addr |
| 35 | |
| 36 | .align 2 |
| 37 | init_sr: |
| 38 | .long 0x007f0000 /* Supervisor mode, everything masked */ |
| 39 | stack_addr: |
| 40 | .long init_thread_union |
| 41 | kernel_start_addr: |
| 42 | .long start_kernel |