18280edafe
For para-virtualized guests running under KVM or other equivalent hypervisor. Signed-off-by: David Daney <david.daney@cavium.com> Signed-off-by: Andreas Herrmann <andreas.herrmann@caviumnetworks.com> Cc: linux-mips@linux-mips.org Cc: James Hogan <james.hogan@imgtec.com> Cc: kvm@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/7004/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
50 lines
1,016 B
C
50 lines
1,016 B
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) 2013 Cavium, Inc
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*/
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#ifndef __ASM_MACH_PARAVIRT_KERNEL_ENTRY_H
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#define __ASM_MACH_PARAVIRT_KERNEL_ENTRY_H
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#define CP0_EBASE $15, 1
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.macro kernel_entry_setup
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mfc0 t0, CP0_EBASE
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andi t0, t0, 0x3ff # CPUNum
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beqz t0, 1f
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# CPUs other than zero goto smp_bootstrap
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j smp_bootstrap
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1:
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.endm
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/*
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* Do SMP slave processor setup necessary before we can safely execute
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* C code.
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*/
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.macro smp_slave_setup
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mfc0 t0, CP0_EBASE
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andi t0, t0, 0x3ff # CPUNum
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slti t1, t0, NR_CPUS
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bnez t1, 1f
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2:
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di
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wait
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b 2b # Unknown CPU, loop forever.
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1:
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PTR_LA t1, paravirt_smp_sp
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PTR_SLL t0, PTR_SCALESHIFT
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PTR_ADDU t1, t1, t0
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3:
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PTR_L sp, 0(t1)
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beqz sp, 3b # Spin until told to proceed.
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PTR_LA t1, paravirt_smp_gp
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PTR_ADDU t1, t1, t0
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sync
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PTR_L gp, 0(t1)
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.endm
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#endif /* __ASM_MACH_PARAVIRT_KERNEL_ENTRY_H */
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