projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 7e35952b RB |
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 | ||
| 28963b1e RB |
26 | /* |
| 27 | * TLB bits | |
| 28 | */ | |
| 29 | #define PAGE_GLOBAL (1 << 6) | |
| 30 | #define PAGE_VALID (1 << 7) | |
| 31 | #define PAGE_DIRTY (1 << 8) | |
| 32 | #define CACHE_CACHABLE_COW (5 << 9) | |
| 33 | ||
| 23946ef1 RB |
34 | /* |
| 35 | * inputs are the text nasid in t1, data nasid in t2. | |
| 36 | */ | |
| 37 | .macro MAPPED_KERNEL_SETUP_TLB | |
| 38 | #ifdef CONFIG_MAPPED_KERNEL | |
| 39 | /* | |
| 40 | * This needs to read the nasid - assume 0 for now. | |
| 41 | * Drop in 0xffffffffc0000000 in tlbhi, 0+VG in tlblo_0, | |
| 42 | * 0+DVG in tlblo_1. | |
| 43 | */ | |
| 44 | dli t0, 0xffffffffc0000000 | |
| 45 | dmtc0 t0, CP0_ENTRYHI | |
| 46 | li t0, 0x1c000 # Offset of text into node memory | |
| 47 | dsll t1, NASID_SHFT # Shift text nasid into place | |
| 48 | dsll t2, NASID_SHFT # Same for data nasid | |
| 49 | or t1, t1, t0 # Physical load address of kernel text | |
| 50 | or t2, t2, t0 # Physical load address of kernel data | |
| 51 | dsrl t1, 12 # 4K pfn | |
| 52 | dsrl t2, 12 # 4K pfn | |
| 53 | dsll t1, 6 # Get pfn into place | |
| 54 | dsll t2, 6 # Get pfn into place | |
| 28963b1e | 55 | li t0, ((PAGE_GLOBAL | PAGE_VALID | CACHE_CACHABLE_COW) >> 6) |
| 23946ef1 RB |
56 | or t0, t0, t1 |
| 57 | mtc0 t0, CP0_ENTRYLO0 # physaddr, VG, cach exlwr | |
| 28963b1e | 58 | li t0, ((PAGE_GLOBAL | PAGE_VALID | PAGE_DIRTY | CACHE_CACHABLE_COW) >> 6) |
| 23946ef1 RB |
59 | or t0, t0, t2 |
| 60 | mtc0 t0, CP0_ENTRYLO1 # physaddr, DVG, cach exlwr | |
| 61 | li t0, 0x1ffe000 # MAPPED_KERN_TLBMASK, TLBPGMASK_16M | |
| 62 | mtc0 t0, CP0_PAGEMASK | |
| 63 | li t0, 0 # KMAP_INX | |
| 64 | mtc0 t0, CP0_INDEX | |
| 65 | li t0, 1 | |
| 66 | mtc0 t0, CP0_WIRED | |
| 67 | tlbwi | |
| 68 | #else | |
| 69 | mtc0 zero, CP0_WIRED | |
| 70 | #endif | |
| 71 | .endm | |
| 72 | ||
| 7e35952b RB |
73 | /* |
| 74 | * Intentionally empty macro, used in head.S. Override in | |
| 75 | * arch/mips/mach-xxx/kernel-entry-init.h when necessary. | |
| 76 | */ | |
| 77 | .macro kernel_entry_setup | |
| 78 | GET_NASID_ASM t1 | |
| 79 | move t2, t1 # text and data are here | |
| 80 | MAPPED_KERNEL_SETUP_TLB | |
| 81 | .endm | |
| 82 | ||
| 83 | /* | |
| 92a76f6d | 84 | * Do SMP slave processor setup necessary before we can safely execute C code. |
| 7e35952b RB |
85 | */ |
| 86 | .macro smp_slave_setup | |
| 87 | GET_NASID_ASM t1 | |
| 88 | dli t0, KLDIR_OFFSET + (KLI_KERN_VARS * KLDIR_ENT_SIZE) + \ | |
| 89 | KLDIR_OFF_POINTER + CAC_BASE | |
| 90 | dsll t1, NASID_SHFT | |
| 91 | or t0, t0, t1 | |
| 92 | ld t0, 0(t0) # t0 points to kern_vars struct | |
| 93 | lh t1, KV_RO_NASID_OFFSET(t0) | |
| 94 | lh t2, KV_RW_NASID_OFFSET(t0) | |
| 95 | MAPPED_KERNEL_SETUP_TLB | |
| 15ad838d TB |
96 | |
| 97 | /* | |
| 98 | * We might not get launched at the address the kernel is linked to, | |
| 99 | * so we jump there. | |
| 100 | */ | |
| 70342287 RB |
101 | PTR_LA t0, 0f |
| 102 | jr t0 | |
| 15ad838d | 103 | 0: |
| 7e35952b RB |
104 | .endm |
| 105 | ||
| 106 | #endif /* __ASM_MACH_IP27_KERNEL_ENTRY_H */ |