6bc9a3966f
This is the complete set of new arch Score's files for linux. Score instruction set support 16bits, 32bits and 64bits instruction, Score SOC had been used in game machine and LCD TV. Signed-off-by: Chen Liqin <liqin.chen@sunplusct.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
70 lines
1.6 KiB
ArmAsm
70 lines
1.6 KiB
ArmAsm
/*
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* arch/score/kernel/head.S
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*
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* Score Processor version.
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*
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* Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
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* Chen Liqin <liqin.chen@sunplusct.com>
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* Lennox Wu <lennox.wu@sunplusct.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see the file COPYING, or write
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* to the Free Software Foundation, Inc.,
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* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <linux/init.h>
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#include <linux/linkage.h>
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#include <asm/asm-offsets.h>
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.extern start_kernel
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.global init_thread_union
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.global kernelsp
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__INIT
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ENTRY(_stext)
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la r30, __bss_start /* initialize BSS segment. */
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la r31, _end
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xor r8, r8, r8
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1: cmp.c r31, r30
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beq 2f
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sw r8, [r30] /* clean memory. */
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addi r30, 4
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b 1b
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2: la r28, init_thread_union /* set kernel stack. */
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mv r0, r28
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addi r0, KERNEL_STACK_SIZE - 32
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la r30, kernelsp
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sw r0, [r30]
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subi r0, 4*4
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xor r30, r30, r30
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ori r30, 0x02 /* enable MMU. */
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mtcr r30, cr4
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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/* there is no parameter */
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xor r4, r4, r4
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xor r5, r5, r5
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xor r6, r6, r6
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xor r7, r7, r7
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la r30, start_kernel /* jump to init_arch */
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br r30
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