head-ftvpci.S
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:1k
- /*
- * linux/arch/arm/boot/compressed/head-ftvpci.S
- *
- * Copyright (C) 2000 FutureTV Labs Ltd.
- *
- * Special startup code for FTV PCI board.
- */
- /*
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
- .section ".start", "ax"
- ftv_start:
- mcr p15, 0, r0, c7, c5, 0 @ flush I cache
- mrc p15, 0, r0, c1, c0
- orr r0, r0, #1 << 12
- mcr p15, 0, r0, c1, c0 @ enable I cache
- mov r0, #0
- mcreq p15, 0, r0, c15, c1, 2 @ enable clock switching
- /* check to see if the kernel must be relocated */
- ldr ip, =ftv_start
- adr sl, ftv_start
- teq ip, sl
- beq 2f @ no need to copy
- /* in the wrong place -> presumably, executing out of ROM */
- sub ip, ip, sl @ displacement
- ldr lr, =_start @ destination
- sub sp, lr, ip @ source
- ldr fp, =_edata @ end of copied area
- 1: ldmia sp!, {r0, r1, r2, r3, r4, r5, r6, r10}
- stmia lr!, {r0, r1, r2, r3, r4, r5, r6, r10}
- cmp lr, fp
- ble 1b
- 2:
- mov r8, #0
- mov r7, #3
- b 1f
- .ltorg
- 1:
- /* fall back into head.S */