15ad838d28
Always jump to the place where the kernel is linked to. This helps where the bootloaders/proms ignores the start address inside the ELF header. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
59 lines
1.4 KiB
C
59 lines
1.4 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2000 Silicon Graphics, Inc.
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* Copyright (C) 2005 Ralf Baechle <ralf@linux-mips.org>
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*/
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#ifndef __ASM_MACH_IP27_KERNEL_ENTRY_H
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#define __ASM_MACH_IP27_KERNEL_ENTRY_H
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#include <asm/sn/addrs.h>
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#include <asm/sn/sn0/hubni.h>
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#include <asm/sn/klkernvars.h>
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/*
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* Returns the local nasid into res.
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*/
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.macro GET_NASID_ASM res
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dli \res, LOCAL_HUB_ADDR(NI_STATUS_REV_ID)
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ld \res, (\res)
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and \res, NSRI_NODEID_MASK
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dsrl \res, NSRI_NODEID_SHFT
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.endm
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/*
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* Intentionally empty macro, used in head.S. Override in
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* arch/mips/mach-xxx/kernel-entry-init.h when necessary.
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*/
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.macro kernel_entry_setup
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GET_NASID_ASM t1
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move t2, t1 # text and data are here
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MAPPED_KERNEL_SETUP_TLB
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.endm
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/*
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* Do SMP slave processor setup necessary before we can savely execute C code.
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*/
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.macro smp_slave_setup
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GET_NASID_ASM t1
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dli t0, KLDIR_OFFSET + (KLI_KERN_VARS * KLDIR_ENT_SIZE) + \
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KLDIR_OFF_POINTER + CAC_BASE
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dsll t1, NASID_SHFT
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or t0, t0, t1
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ld t0, 0(t0) # t0 points to kern_vars struct
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lh t1, KV_RO_NASID_OFFSET(t0)
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lh t2, KV_RW_NASID_OFFSET(t0)
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MAPPED_KERNEL_SETUP_TLB
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/*
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* We might not get launched at the address the kernel is linked to,
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* so we jump there.
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*/
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PTR_LA t0, 0f
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jr t0
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0:
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.endm
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#endif /* __ASM_MACH_IP27_KERNEL_ENTRY_H */
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