diff options
Diffstat (limited to 'arch/sh/kernel/head.S')
-rw-r--r-- | arch/sh/kernel/head.S | 120 |
1 files changed, 0 insertions, 120 deletions
diff --git a/arch/sh/kernel/head.S b/arch/sh/kernel/head.S deleted file mode 100644 index 3338239717f..00000000000 --- a/arch/sh/kernel/head.S +++ /dev/null @@ -1,120 +0,0 @@ -/* $Id: head.S,v 1.7 2003/09/01 17:58:19 lethal Exp $ - * - * arch/sh/kernel/head.S - * - * Copyright (C) 1999, 2000 Niibe Yutaka & Kaz Kojima - * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - * Head.S contains the SH exception handlers and startup code. - */ -#include <linux/linkage.h> -#include <asm/thread_info.h> - -#ifdef CONFIG_CPU_SH4A -#define SYNCO() synco - -#define PREFI(label, reg) \ - mov.l label, reg; \ - prefi @reg -#else -#define SYNCO() -#define PREFI(label, reg) -#endif - - .section .empty_zero_page, "aw" -ENTRY(empty_zero_page) - .long 1 /* MOUNT_ROOT_RDONLY */ - .long 0 /* RAMDISK_FLAGS */ - .long 0x0200 /* ORIG_ROOT_DEV */ - .long 1 /* LOADER_TYPE */ - .long 0x00360000 /* INITRD_START */ - .long 0x000a0000 /* INITRD_SIZE */ - .long 0 -1: - .skip PAGE_SIZE - empty_zero_page - 1b - - .section .text.head, "ax" - -/* - * Condition at the entry of _stext: - * - * BSC has already been initialized. - * INTC may or may not be initialized. - * VBR may or may not be initialized. - * MMU may or may not be initialized. - * Cache may or may not be initialized. - * Hardware (including on-chip modules) may or may not be initialized. - * - */ -ENTRY(_stext) - ! Initialize Status Register - mov.l 1f, r0 ! MD=1, RB=0, BL=0, IMASK=0xF - ldc r0, sr - ! Initialize global interrupt mask -#ifdef CONFIG_CPU_HAS_SR_RB - mov #0, r0 - ldc r0, r6_bank -#endif - - /* - * Prefetch if possible to reduce cache miss penalty. - * - * We do this early on for SH-4A as a micro-optimization, - * as later on we will have speculative execution enabled - * and this will become less of an issue. - */ - PREFI(5f, r0) - PREFI(6f, r0) - - ! - mov.l 2f, r0 - mov r0, r15 ! Set initial r15 (stack pointer) -#ifdef CONFIG_CPU_HAS_SR_RB - mov.l 7f, r0 - ldc r0, r7_bank ! ... and initial thread_info -#endif - - ! Clear BSS area -#ifdef CONFIG_SMP - mov.l 3f, r0 - cmp/eq #0, r0 ! skip clear if set to zero - bt 10f -#endif - - mov.l 3f, r1 - add #4, r1 - mov.l 4f, r2 - mov #0, r0 -9: cmp/hs r2, r1 - bf/s 9b ! while (r1 < r2) - mov.l r0,@-r2 - -10: - ! Additional CPU initialization - mov.l 6f, r0 - jsr @r0 - nop - - SYNCO() ! Wait for pending instructions.. - - ! Start kernel - mov.l 5f, r0 - jmp @r0 - nop - - .balign 4 -#if defined(CONFIG_CPU_SH2) -1: .long 0x000000F0 ! IMASK=0xF -#else -1: .long 0x400080F0 ! MD=1, RB=0, BL=0, FD=1, IMASK=0xF -#endif -ENTRY(stack_start) -2: .long init_thread_union+THREAD_SIZE -3: .long __bss_start -4: .long _end -5: .long start_kernel -6: .long sh_cpu_init -7: .long init_thread_union |