diff options
Diffstat (limited to 'arch/avr32/kernel/head.S')
-rw-r--r-- | arch/avr32/kernel/head.S | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/arch/avr32/kernel/head.S b/arch/avr32/kernel/head.S new file mode 100644 index 000000000000..773b7ad87be9 --- /dev/null +++ b/arch/avr32/kernel/head.S | |||
@@ -0,0 +1,45 @@ | |||
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 | ||