1 /* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * Copyright (C) 2003-2017 Cavium, Inc. 7 */ 8 9 #ifndef __CVMX_BOOT_VECTOR_H__ 10 #define __CVMX_BOOT_VECTOR_H__ 11 12 #include <asm/octeon/octeon.h> 13 14 /* 15 * The boot vector table is made up of an array of 1024 elements of 16 * struct cvmx_boot_vector_element. There is one entry for each 17 * possible MIPS CPUNum, indexed by the CPUNum. 18 * 19 * Once cvmx_boot_vector_get() returns a non-NULL value (indicating 20 * success), NMI to a core will cause execution to transfer to the 21 * target_ptr location for that core's entry in the vector table. 22 * 23 * The struct cvmx_boot_vector_element fields app0, app1, and app2 can 24 * be used by the application that has set the target_ptr in any 25 * application specific manner, they are not touched by the vectoring 26 * code. 27 * 28 * The boot vector code clobbers the CP0_DESAVE register, and on 29 * OCTEON II and later CPUs also clobbers CP0_KScratch2. All GP 30 * registers are preserved, except on pre-OCTEON II CPUs, where k1 is 31 * clobbered. 32 * 33 */ 34 35 36 /* 37 * Applications install the boot bus code in cvmx-boot-vector.c, which 38 * uses this magic: 39 */ 40 #define OCTEON_BOOT_MOVEABLE_MAGIC1 0xdb00110ad358eacdull 41 42 struct cvmx_boot_vector_element { 43 /* kseg0 or xkphys address of target code. */ 44 uint64_t target_ptr; 45 /* Three application specific arguments. */ 46 uint64_t app0; 47 uint64_t app1; 48 uint64_t app2; 49 }; 50 51 struct cvmx_boot_vector_element *cvmx_boot_vector_get(void); 52 53 #endif /* __CVMX_BOOT_VECTOR_H__ */ 54