projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 7d5f5fa2 GU |
1 | #include <linux/linkage.h> |
| 2 | ||
| 3 | #include <asm/asm-offsets.h> | |
| 4 | #include <asm/page.h> | |
| 5 | #include <asm/setup.h> | |
| 6 | ||
| 7 | ||
| 8 | #define MMU_BASE 8 /* MMU flags base in cpu_mmu_flags */ | |
| 9 | ||
| 10 | .text | |
| 11 | ||
| 12 | ENTRY(relocate_new_kernel) | |
| 13 | movel %sp@(4),%a0 /* a0 = ptr */ | |
| 14 | movel %sp@(8),%a1 /* a1 = start */ | |
| 15 | movel %sp@(12),%d1 /* d1 = cpu_mmu_flags */ | |
| 16 | movew #PAGE_MASK,%d2 /* d2 = PAGE_MASK */ | |
| 17 | ||
| 18 | /* Disable MMU */ | |
| 19 | ||
| 20 | btst #MMU_BASE + MMUB_68851,%d1 | |
| 21 | jeq 3f | |
| 22 | ||
| 23 | 1: /* 68851 or 68030 */ | |
| 24 | ||
| 25 | lea %pc@(.Lcopy),%a4 | |
| 26 | 2: addl #0x00000000,%a4 /* virt_to_phys() */ | |
| 27 | ||
| 28 | .section ".m68k_fixup","aw" | |
| 29 | .long M68K_FIXUP_MEMOFFSET, 2b+2 | |
| 30 | .previous | |
| 31 | ||
| 32 | .chip 68030 | |
| 33 | pmove %tc,%d0 /* Disable MMU */ | |
| 34 | bclr #7,%d0 | |
| 35 | pmove %d0,%tc | |
| 36 | jmp %a4@ /* Jump to physical .Lcopy */ | |
| 37 | .chip 68k | |
| 38 | ||
| 39 | 3: | |
| 40 | btst #MMU_BASE + MMUB_68030,%d1 | |
| 41 | jne 1b | |
| 42 | ||
| 43 | btst #MMU_BASE + MMUB_68040,%d1 | |
| 44 | jeq 6f | |
| 45 | ||
| 46 | 4: /* 68040 or 68060 */ | |
| 47 | ||
| 48 | lea %pc@(.Lcont040),%a4 | |
| 49 | 5: addl #0x00000000,%a4 /* virt_to_phys() */ | |
| 50 | ||
| 51 | .section ".m68k_fixup","aw" | |
| 52 | .long M68K_FIXUP_MEMOFFSET, 5b+2 | |
| 53 | .previous | |
| 54 | ||
| 55 | movel %a4,%d0 | |
| 56 | andl #0xff000000,%d0 | |
| 57 | orw #0xe020,%d0 /* Map 16 MiB, enable, cacheable */ | |
| 58 | .chip 68040 | |
| 59 | movec %d0,%itt0 | |
| 60 | movec %d0,%dtt0 | |
| 61 | .chip 68k | |
| 62 | jmp %a4@ /* Jump to physical .Lcont040 */ | |
| 63 | ||
| 64 | .Lcont040: | |
| 65 | moveq #0,%d0 | |
| 66 | .chip 68040 | |
| 67 | movec %d0,%tc /* Disable MMU */ | |
| 68 | movec %d0,%itt0 | |
| 69 | movec %d0,%itt1 | |
| 70 | movec %d0,%dtt0 | |
| 71 | movec %d0,%dtt1 | |
| 72 | .chip 68k | |
| 73 | jra .Lcopy | |
| 74 | ||
| 75 | 6: | |
| 76 | btst #MMU_BASE + MMUB_68060,%d1 | |
| 77 | jne 4b | |
| 78 | ||
| 79 | .Lcopy: | |
| 80 | movel %a0@+,%d0 /* d0 = entry = *ptr */ | |
| 81 | jeq .Lflush | |
| 82 | ||
| 83 | btst #2,%d0 /* entry & IND_DONE? */ | |
| 84 | jne .Lflush | |
| 85 | ||
| 86 | btst #1,%d0 /* entry & IND_INDIRECTION? */ | |
| 87 | jeq 1f | |
| 88 | andw %d2,%d0 | |
| 89 | movel %d0,%a0 /* ptr = entry & PAGE_MASK */ | |
| 90 | jra .Lcopy | |
| 91 | ||
| 92 | 1: | |
| 93 | btst #0,%d0 /* entry & IND_DESTINATION? */ | |
| 94 | jeq 2f | |
| 95 | andw %d2,%d0 | |
| 96 | movel %d0,%a2 /* a2 = dst = entry & PAGE_MASK */ | |
| 97 | jra .Lcopy | |
| 98 | ||
| 99 | 2: | |
| 100 | btst #3,%d0 /* entry & IND_SOURCE? */ | |
| 101 | jeq .Lcopy | |
| 102 | ||
| 103 | andw %d2,%d0 | |
| 104 | movel %d0,%a3 /* a3 = src = entry & PAGE_MASK */ | |
| 105 | movew #PAGE_SIZE/32 - 1,%d0 /* d0 = PAGE_SIZE/32 - 1 */ | |
| 106 | 3: | |
| 107 | movel %a3@+,%a2@+ /* *dst++ = *src++ */ | |
| 108 | movel %a3@+,%a2@+ /* *dst++ = *src++ */ | |
| 109 | movel %a3@+,%a2@+ /* *dst++ = *src++ */ | |
| 110 | movel %a3@+,%a2@+ /* *dst++ = *src++ */ | |
| 111 | movel %a3@+,%a2@+ /* *dst++ = *src++ */ | |
| 112 | movel %a3@+,%a2@+ /* *dst++ = *src++ */ | |
| 113 | movel %a3@+,%a2@+ /* *dst++ = *src++ */ | |
| 114 | movel %a3@+,%a2@+ /* *dst++ = *src++ */ | |
| 115 | dbf %d0, 3b | |
| 116 | jra .Lcopy | |
| 117 | ||
| 118 | .Lflush: | |
| 119 | /* Flush all caches */ | |
| 120 | ||
| 121 | btst #CPUB_68020,%d1 | |
| 122 | jeq 2f | |
| 123 | ||
| 124 | 1: /* 68020 or 68030 */ | |
| 125 | .chip 68030 | |
| 126 | movec %cacr,%d0 | |
| 127 | orw #0x808,%d0 | |
| 128 | movec %d0,%cacr | |
| 129 | .chip 68k | |
| 130 | jra .Lreincarnate | |
| 131 | ||
| 132 | 2: | |
| 133 | btst #CPUB_68030,%d1 | |
| 134 | jne 1b | |
| 135 | ||
| 136 | btst #CPUB_68040,%d1 | |
| 137 | jeq 4f | |
| 138 | ||
| 139 | 3: /* 68040 or 68060 */ | |
| 140 | .chip 68040 | |
| 141 | nop | |
| 142 | cpusha %bc | |
| 143 | nop | |
| 144 | cinva %bc | |
| 145 | nop | |
| 146 | .chip 68k | |
| 147 | jra .Lreincarnate | |
| 148 | ||
| 149 | 4: | |
| 150 | btst #CPUB_68060,%d1 | |
| 151 | jne 3b | |
| 152 | ||
| 153 | .Lreincarnate: | |
| 154 | jmp %a1@ | |
| 155 | ||
| 156 | relocate_new_kernel_end: | |
| 157 | ||
| 158 | ENTRY(relocate_new_kernel_size) | |
| 159 | .long relocate_new_kernel_end - relocate_new_kernel |