diff options
Diffstat (limited to 'arch/score/kernel/head.S')
| -rw-r--r-- | arch/score/kernel/head.S | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/arch/score/kernel/head.S b/arch/score/kernel/head.S new file mode 100644 index 000000000000..22a7e3c7292b --- /dev/null +++ b/arch/score/kernel/head.S | |||
| @@ -0,0 +1,70 @@ | |||
| 1 | /* | ||
| 2 | * arch/score/kernel/head.S | ||
| 3 | * | ||
| 4 | * Score Processor version. | ||
| 5 | * | ||
| 6 | * Copyright (C) 2009 Sunplus Core Technology Co., Ltd. | ||
| 7 | * Chen Liqin <liqin.chen@sunplusct.com> | ||
| 8 | * Lennox Wu <lennox.wu@sunplusct.com> | ||
| 9 | * | ||
| 10 | * This program is free software; you can redistribute it and/or modify | ||
| 11 | * it under the terms of the GNU General Public License as published by | ||
| 12 | * the Free Software Foundation; either version 2 of the License, or | ||
| 13 | * (at your option) any later version. | ||
| 14 | * | ||
| 15 | * This program is distributed in the hope that it will be useful, | ||
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| 18 | * GNU General Public License for more details. | ||
| 19 | * | ||
| 20 | * You should have received a copy of the GNU General Public License | ||
| 21 | * along with this program; if not, see the file COPYING, or write | ||
| 22 | * to the Free Software Foundation, Inc., | ||
| 23 | * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 24 | */ | ||
| 25 | #include <linux/init.h> | ||
| 26 | #include <linux/linkage.h> | ||
| 27 | |||
| 28 | #include <asm/asm-offsets.h> | ||
| 29 | |||
| 30 | .extern start_kernel | ||
| 31 | .global init_thread_union | ||
| 32 | .global kernelsp | ||
| 33 | |||
| 34 | __INIT | ||
| 35 | ENTRY(_stext) | ||
| 36 | la r30, __bss_start /* initialize BSS segment. */ | ||
| 37 | la r31, _end | ||
| 38 | xor r8, r8, r8 | ||
| 39 | |||
| 40 | 1: cmp.c r31, r30 | ||
| 41 | beq 2f | ||
| 42 | |||
| 43 | sw r8, [r30] /* clean memory. */ | ||
| 44 | addi r30, 4 | ||
| 45 | b 1b | ||
| 46 | |||
| 47 | 2: la r28, init_thread_union /* set kernel stack. */ | ||
| 48 | mv r0, r28 | ||
| 49 | addi r0, KERNEL_STACK_SIZE - 32 | ||
| 50 | la r30, kernelsp | ||
| 51 | sw r0, [r30] | ||
| 52 | subi r0, 4*4 | ||
| 53 | xor r30, r30, r30 | ||
| 54 | ori r30, 0x02 /* enable MMU. */ | ||
| 55 | mtcr r30, cr4 | ||
| 56 | nop | ||
| 57 | nop | ||
| 58 | nop | ||
| 59 | nop | ||
| 60 | nop | ||
| 61 | nop | ||
| 62 | nop | ||
| 63 | |||
| 64 | /* there is no parameter */ | ||
| 65 | xor r4, r4, r4 | ||
| 66 | xor r5, r5, r5 | ||
| 67 | xor r6, r6, r6 | ||
| 68 | xor r7, r7, r7 | ||
| 69 | la r30, start_kernel /* jump to init_arch */ | ||
| 70 | br r30 | ||