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) 2000 Silicon Graphics, Inc. 7 * Copyright (C) 2005 Ralf Baechle <ralf@linux-mips.org> 8 */ 9 #ifndef __ASM_MACH_IP27_KERNEL_ENTRY_H 10 #define __ASM_MACH_IP27_KERNEL_ENTRY_H 11 12 #include <asm/sn/addrs.h> 13 #include <asm/sn/sn0/hubni.h> 14 #include <asm/sn/klkernvars.h> 15 16 /* 17 * Returns the local nasid into res. 18 */ 19 .macro GET_NASID_ASM res 20 dli \res, LOCAL_HUB_ADDR(NI_STATUS_REV_ID) 21 ld \res, (\res) 22 and \res, NSRI_NODEID_MASK 23 dsrl \res, NSRI_NODEID_SHFT 24 .endm 25 26 /* 27 * Intentionally empty macro, used in head.S. Override in 28 * arch/mips/mach-xxx/kernel-entry-init.h when necessary. 29 */ 30 .macro kernel_entry_setup 31 GET_NASID_ASM t1 32 move t2, t1 # text and data are here 33 MAPPED_KERNEL_SETUP_TLB 34 .endm 35 36 /* 37 * Do SMP slave processor setup necessary before we can savely execute C code. 38 */ 39 .macro smp_slave_setup 40 GET_NASID_ASM t1 41 dli t0, KLDIR_OFFSET + (KLI_KERN_VARS * KLDIR_ENT_SIZE) + \ 42 KLDIR_OFF_POINTER + CAC_BASE 43 dsll t1, NASID_SHFT 44 or t0, t0, t1 45 ld t0, 0(t0) # t0 points to kern_vars struct 46 lh t1, KV_RO_NASID_OFFSET(t0) 47 lh t2, KV_RW_NASID_OFFSET(t0) 48 MAPPED_KERNEL_SETUP_TLB 49 50 /* 51 * We might not get launched at the address the kernel is linked to, 52 * so we jump there. 53 */ 54 PTR_LA t0, 0f 55 jr t0 56 0: 57 .endm 58 59 #endif /* __ASM_MACH_IP27_KERNEL_ENTRY_H */ 60