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) 2013 Cavium, Inc 7 */ 8 #ifndef __ASM_MACH_PARAVIRT_KERNEL_ENTRY_H 9 #define __ASM_MACH_PARAVIRT_KERNEL_ENTRY_H 10 11 #define CP0_EBASE $15, 1 12 13 .macro kernel_entry_setup 14 #ifdef CONFIG_SMP 15 mfc0 t0, CP0_EBASE 16 andi t0, t0, 0x3ff # CPUNum 17 beqz t0, 1f 18 # CPUs other than zero goto smp_bootstrap 19 j smp_bootstrap 20 #endif /* CONFIG_SMP */ 21 22 1: 23 .endm 24 25 /* 26 * Do SMP slave processor setup necessary before we can safely execute 27 * C code. 28 */ 29 .macro smp_slave_setup 30 mfc0 t0, CP0_EBASE 31 andi t0, t0, 0x3ff # CPUNum 32 slti t1, t0, NR_CPUS 33 bnez t1, 1f 34 2: 35 di 36 wait 37 b 2b # Unknown CPU, loop forever. 38 1: 39 PTR_LA t1, paravirt_smp_sp 40 PTR_SLL t0, PTR_SCALESHIFT 41 PTR_ADDU t1, t1, t0 42 3: 43 PTR_L sp, 0(t1) 44 beqz sp, 3b # Spin until told to proceed. 45 46 PTR_LA t1, paravirt_smp_gp 47 PTR_ADDU t1, t1, t0 48 sync 49 PTR_L gp, 0(t1) 50 .endm 51 52 #endif /* __ASM_MACH_PARAVIRT_KERNEL_ENTRY_H */ 53
