| Ralf Baechle | 7e35952 | 2005-07-14 09:42:32 +0000 | [diff] [blame] | 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 |
| Thomas Bogendoerfer | 15ad838 | 2007-09-13 20:23:48 +0200 | [diff] [blame] | 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: |
| Ralf Baechle | 7e35952 | 2005-07-14 09:42:32 +0000 | [diff] [blame] | 57 | .endm |
| 58 | |
| 59 | #endif /* __ASM_MACH_IP27_KERNEL_ENTRY_H */ |