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