54 lines
1.6 KiB
C
54 lines
1.6 KiB
C
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/*
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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) 2003-2017 Cavium, Inc.
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*/
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#ifndef __CVMX_BOOT_VECTOR_H__
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#define __CVMX_BOOT_VECTOR_H__
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#include <asm/octeon/octeon.h>
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/*
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* The boot vector table is made up of an array of 1024 elements of
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* struct cvmx_boot_vector_element. There is one entry for each
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* possible MIPS CPUNum, indexed by the CPUNum.
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*
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* Once cvmx_boot_vector_get() returns a non-NULL value (indicating
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* success), NMI to a core will cause execution to transfer to the
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* target_ptr location for that core's entry in the vector table.
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*
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* The struct cvmx_boot_vector_element fields app0, app1, and app2 can
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* be used by the application that has set the target_ptr in any
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* application specific manner, they are not touched by the vectoring
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* code.
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*
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* The boot vector code clobbers the CP0_DESAVE register, and on
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* OCTEON II and later CPUs also clobbers CP0_KScratch2. All GP
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* registers are preserved, except on pre-OCTEON II CPUs, where k1 is
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* clobbered.
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*
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*/
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/*
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* Applications install the boot bus code in cvmx-boot-vector.c, which
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* uses this magic:
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*/
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#define OCTEON_BOOT_MOVEABLE_MAGIC1 0xdb00110ad358eacdull
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struct cvmx_boot_vector_element {
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/* kseg0 or xkphys address of target code. */
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uint64_t target_ptr;
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/* Three application specific arguments. */
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uint64_t app0;
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uint64_t app1;
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uint64_t app2;
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};
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struct cvmx_boot_vector_element *cvmx_boot_vector_get(void);
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#endif /* __CVMX_BOOT_VECTOR_H__ */
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