diff options
Diffstat (limited to 'arch/mips/include/asm/mach-ip27/kernel-entry-init.h')
| -rw-r--r-- | arch/mips/include/asm/mach-ip27/kernel-entry-init.h | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/arch/mips/include/asm/mach-ip27/kernel-entry-init.h b/arch/mips/include/asm/mach-ip27/kernel-entry-init.h new file mode 100644 index 000000000000..624d66c7f290 --- /dev/null +++ b/arch/mips/include/asm/mach-ip27/kernel-entry-init.h @@ -0,0 +1,59 @@ +/* + * 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. + * + * Copyright (C) 2000 Silicon Graphics, Inc. + * Copyright (C) 2005 Ralf Baechle <ralf@linux-mips.org> + */ +#ifndef __ASM_MACH_IP27_KERNEL_ENTRY_H +#define __ASM_MACH_IP27_KERNEL_ENTRY_H + +#include <asm/sn/addrs.h> +#include <asm/sn/sn0/hubni.h> +#include <asm/sn/klkernvars.h> + +/* + * Returns the local nasid into res. + */ + .macro GET_NASID_ASM res + dli \res, LOCAL_HUB_ADDR(NI_STATUS_REV_ID) + ld \res, (\res) + and \res, NSRI_NODEID_MASK + dsrl \res, NSRI_NODEID_SHFT + .endm + +/* + * Intentionally empty macro, used in head.S. Override in + * arch/mips/mach-xxx/kernel-entry-init.h when necessary. + */ + .macro kernel_entry_setup + GET_NASID_ASM t1 + move t2, t1 # text and data are here + MAPPED_KERNEL_SETUP_TLB + .endm + +/* + * Do SMP slave processor setup necessary before we can savely execute C code. + */ + .macro smp_slave_setup + GET_NASID_ASM t1 + dli t0, KLDIR_OFFSET + (KLI_KERN_VARS * KLDIR_ENT_SIZE) + \ + KLDIR_OFF_POINTER + CAC_BASE + dsll t1, NASID_SHFT + or t0, t0, t1 + ld t0, 0(t0) # t0 points to kern_vars struct + lh t1, KV_RO_NASID_OFFSET(t0) + lh t2, KV_RW_NASID_OFFSET(t0) + MAPPED_KERNEL_SETUP_TLB + + /* + * We might not get launched at the address the kernel is linked to, + * so we jump there. + */ + PTR_LA t0, 0f + jr t0 +0: + .endm + +#endif /* __ASM_MACH_IP27_KERNEL_ENTRY_H */ |