diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/m68k/platform/coldfire/head.S | 47 |
1 files changed, 46 insertions, 1 deletions
diff --git a/arch/m68k/platform/coldfire/head.S b/arch/m68k/platform/coldfire/head.S index 49666b4..38f04a3 100644 --- a/arch/m68k/platform/coldfire/head.S +++ b/arch/m68k/platform/coldfire/head.S @@ -3,7 +3,7 @@ /* * head.S -- common startup code for ColdFire CPUs. * - * (C) Copyright 1999-2010, Greg Ungerer <gerg@snapgear.com>. + * (C) Copyright 1999-2011, Greg Ungerer <gerg@snapgear.com>. */ /*****************************************************************************/ @@ -13,6 +13,7 @@ #include <asm/asm-offsets.h> #include <asm/coldfire.h> #include <asm/mcfsim.h> +#include <asm/mcfmmu.h> #include <asm/thread_info.h> /*****************************************************************************/ @@ -135,6 +136,14 @@ _init_sp: __HEAD +#ifdef CONFIG_MMU +_start0: + jmp _start +.global kernel_pg_dir +.equ kernel_pg_dir,_start0 +.equ .,_start0+0x1000 +#endif + /* * This is the codes first entry point. This is where it all * begins... @@ -193,6 +202,26 @@ _start: movec %d0,%CACR nop +#ifdef CONFIG_MMU + /* + * Identity mapping for the kernel region. + */ + movel #(MMUBASE+1),%d0 /* enable MMUBAR registers */ + movec %d0,%MMUBAR + movel #MMUOR_CA,%d0 /* clear TLB entries */ + movel %d0,MMUOR + movel #0,%d0 /* set ASID to 0 */ + movec %d0,%asid + + movel #MMUCR_EN,%d0 /* Enable the identity map */ + movel %d0,MMUCR + nop /* sync i-pipeline */ + + movel #_vstart,%a0 /* jump to "virtual" space */ + jmp %a0@ +_vstart: +#endif /* CONFIG_MMU */ + #ifdef CONFIG_ROMFS_FS /* * Move ROM filesystem above bss :-) @@ -238,6 +267,22 @@ _clear_bss: lea init_thread_union,%a0 lea THREAD_SIZE(%a0),%sp +#ifdef CONFIG_MMU +.global m68k_cputype +.global m68k_mmutype +.global m68k_fputype +.global m68k_machtype + movel #CPU_COLDFIRE,%d0 + movel %d0,m68k_cputype /* Mark us as a ColdFire */ + movel #MMU_COLDFIRE,%d0 + movel %d0,m68k_mmutype + movel #FPU_COLDFIRE,%d0 + movel %d0,m68k_fputype + movel #MACH_M54XX,%d0 + movel %d0,m68k_machtype /* Mark us as a 54xx machine */ + lea init_task,%a2 /* Set "current" init task */ +#endif + /* * Assember start up done, start code proper. */ |