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5f97f7f9 HS |
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 | ||
33 | /* Set up the PIO, SDRAM controller, early printk, etc. */ | |
34 | rcall board_early_init | |
35 | ||
36 | /* Start the show */ | |
37 | lddpc pc, kernel_start_addr | |
38 | ||
39 | .align 2 | |
40 | init_sr: | |
41 | .long 0x007f0000 /* Supervisor mode, everything masked */ | |
42 | stack_addr: | |
43 | .long init_thread_union | |
44 | kernel_start_addr: | |
45 | .long start_kernel |