diff options
Diffstat (limited to 'arch/powerpc/kernel/head_32.S')
-rw-r--r-- | arch/powerpc/kernel/head_32.S | 122 |
1 files changed, 3 insertions, 119 deletions
diff --git a/arch/powerpc/kernel/head_32.S b/arch/powerpc/kernel/head_32.S index c897203198b1..7d73a13450b0 100644 --- a/arch/powerpc/kernel/head_32.S +++ b/arch/powerpc/kernel/head_32.S | |||
@@ -9,7 +9,6 @@ | |||
9 | * rewritten by Paul Mackerras. | 9 | * rewritten by Paul Mackerras. |
10 | * Copyright (C) 1996 Paul Mackerras. | 10 | * Copyright (C) 1996 Paul Mackerras. |
11 | * MPC8xx modifications Copyright (C) 1997 Dan Malek (dmalek@jlc.net). | 11 | * MPC8xx modifications Copyright (C) 1997 Dan Malek (dmalek@jlc.net). |
12 | * Amiga/APUS changes by Jesper Skov (jskov@cygnus.co.uk). | ||
13 | * | 12 | * |
14 | * This file contains the low-level support and setup for the | 13 | * This file contains the low-level support and setup for the |
15 | * PowerPC platform, including trap and interrupt dispatch. | 14 | * PowerPC platform, including trap and interrupt dispatch. |
@@ -32,10 +31,6 @@ | |||
32 | #include <asm/ppc_asm.h> | 31 | #include <asm/ppc_asm.h> |
33 | #include <asm/asm-offsets.h> | 32 | #include <asm/asm-offsets.h> |
34 | 33 | ||
35 | #ifdef CONFIG_APUS | ||
36 | #include <asm/amigappc.h> | ||
37 | #endif | ||
38 | |||
39 | /* 601 only have IBAT; cr0.eq is set on 601 when using this macro */ | 34 | /* 601 only have IBAT; cr0.eq is set on 601 when using this macro */ |
40 | #define LOAD_BAT(n, reg, RA, RB) \ | 35 | #define LOAD_BAT(n, reg, RA, RB) \ |
41 | /* see the comment for clear_bats() -- Cort */ \ | 36 | /* see the comment for clear_bats() -- Cort */ \ |
@@ -92,11 +87,6 @@ _start: | |||
92 | * r4: virtual address of boot_infos_t | 87 | * r4: virtual address of boot_infos_t |
93 | * r5: 0 | 88 | * r5: 0 |
94 | * | 89 | * |
95 | * APUS | ||
96 | * r3: 'APUS' | ||
97 | * r4: physical address of memory base | ||
98 | * Linux/m68k style BootInfo structure at &_end. | ||
99 | * | ||
100 | * PREP | 90 | * PREP |
101 | * This is jumped to on prep systems right after the kernel is relocated | 91 | * This is jumped to on prep systems right after the kernel is relocated |
102 | * to its proper place in memory by the boot loader. The expected layout | 92 | * to its proper place in memory by the boot loader. The expected layout |
@@ -150,14 +140,6 @@ __start: | |||
150 | */ | 140 | */ |
151 | bl early_init | 141 | bl early_init |
152 | 142 | ||
153 | #ifdef CONFIG_APUS | ||
154 | /* On APUS the __va/__pa constants need to be set to the correct | ||
155 | * values before continuing. | ||
156 | */ | ||
157 | mr r4,r30 | ||
158 | bl fix_mem_constants | ||
159 | #endif /* CONFIG_APUS */ | ||
160 | |||
161 | /* Switch MMU off, clear BATs and flush TLB. At this point, r3 contains | 143 | /* Switch MMU off, clear BATs and flush TLB. At this point, r3 contains |
162 | * the physical address we are running at, returned by early_init() | 144 | * the physical address we are running at, returned by early_init() |
163 | */ | 145 | */ |
@@ -167,7 +149,7 @@ __after_mmu_off: | |||
167 | bl flush_tlbs | 149 | bl flush_tlbs |
168 | 150 | ||
169 | bl initial_bats | 151 | bl initial_bats |
170 | #if !defined(CONFIG_APUS) && defined(CONFIG_BOOTX_TEXT) | 152 | #if defined(CONFIG_BOOTX_TEXT) |
171 | bl setup_disp_bat | 153 | bl setup_disp_bat |
172 | #endif | 154 | #endif |
173 | 155 | ||
@@ -183,7 +165,6 @@ __after_mmu_off: | |||
183 | #endif /* CONFIG_6xx */ | 165 | #endif /* CONFIG_6xx */ |
184 | 166 | ||
185 | 167 | ||
186 | #ifndef CONFIG_APUS | ||
187 | /* | 168 | /* |
188 | * We need to run with _start at physical address 0. | 169 | * We need to run with _start at physical address 0. |
189 | * On CHRP, we are loaded at 0x10000 since OF on CHRP uses | 170 | * On CHRP, we are loaded at 0x10000 since OF on CHRP uses |
@@ -196,7 +177,6 @@ __after_mmu_off: | |||
196 | addis r4,r3,KERNELBASE@h /* current address of _start */ | 177 | addis r4,r3,KERNELBASE@h /* current address of _start */ |
197 | cmpwi 0,r4,0 /* are we already running at 0? */ | 178 | cmpwi 0,r4,0 /* are we already running at 0? */ |
198 | bne relocate_kernel | 179 | bne relocate_kernel |
199 | #endif /* CONFIG_APUS */ | ||
200 | /* | 180 | /* |
201 | * we now have the 1st 16M of ram mapped with the bats. | 181 | * we now have the 1st 16M of ram mapped with the bats. |
202 | * prep needs the mmu to be turned on here, but pmac already has it on. | 182 | * prep needs the mmu to be turned on here, but pmac already has it on. |
@@ -881,85 +861,6 @@ _GLOBAL(copy_and_flush) | |||
881 | addi r6,r6,4 | 861 | addi r6,r6,4 |
882 | blr | 862 | blr |
883 | 863 | ||
884 | #ifdef CONFIG_APUS | ||
885 | /* | ||
886 | * On APUS the physical base address of the kernel is not known at compile | ||
887 | * time, which means the __pa/__va constants used are incorrect. In the | ||
888 | * __init section is recorded the virtual addresses of instructions using | ||
889 | * these constants, so all that has to be done is fix these before | ||
890 | * continuing the kernel boot. | ||
891 | * | ||
892 | * r4 = The physical address of the kernel base. | ||
893 | */ | ||
894 | fix_mem_constants: | ||
895 | mr r10,r4 | ||
896 | addis r10,r10,-KERNELBASE@h /* virt_to_phys constant */ | ||
897 | neg r11,r10 /* phys_to_virt constant */ | ||
898 | |||
899 | lis r12,__vtop_table_begin@h | ||
900 | ori r12,r12,__vtop_table_begin@l | ||
901 | add r12,r12,r10 /* table begin phys address */ | ||
902 | lis r13,__vtop_table_end@h | ||
903 | ori r13,r13,__vtop_table_end@l | ||
904 | add r13,r13,r10 /* table end phys address */ | ||
905 | subi r12,r12,4 | ||
906 | subi r13,r13,4 | ||
907 | 1: lwzu r14,4(r12) /* virt address of instruction */ | ||
908 | add r14,r14,r10 /* phys address of instruction */ | ||
909 | lwz r15,0(r14) /* instruction, now insert top */ | ||
910 | rlwimi r15,r10,16,16,31 /* half of vp const in low half */ | ||
911 | stw r15,0(r14) /* of instruction and restore. */ | ||
912 | dcbst r0,r14 /* write it to memory */ | ||
913 | sync | ||
914 | icbi r0,r14 /* flush the icache line */ | ||
915 | cmpw r12,r13 | ||
916 | bne 1b | ||
917 | sync /* additional sync needed on g4 */ | ||
918 | isync | ||
919 | |||
920 | /* | ||
921 | * Map the memory where the exception handlers will | ||
922 | * be copied to when hash constants have been patched. | ||
923 | */ | ||
924 | #ifdef CONFIG_APUS_FAST_EXCEPT | ||
925 | lis r8,0xfff0 | ||
926 | #else | ||
927 | lis r8,0 | ||
928 | #endif | ||
929 | ori r8,r8,0x2 /* 128KB, supervisor */ | ||
930 | mtspr SPRN_DBAT3U,r8 | ||
931 | mtspr SPRN_DBAT3L,r8 | ||
932 | |||
933 | lis r12,__ptov_table_begin@h | ||
934 | ori r12,r12,__ptov_table_begin@l | ||
935 | add r12,r12,r10 /* table begin phys address */ | ||
936 | lis r13,__ptov_table_end@h | ||
937 | ori r13,r13,__ptov_table_end@l | ||
938 | add r13,r13,r10 /* table end phys address */ | ||
939 | subi r12,r12,4 | ||
940 | subi r13,r13,4 | ||
941 | 1: lwzu r14,4(r12) /* virt address of instruction */ | ||
942 | add r14,r14,r10 /* phys address of instruction */ | ||
943 | lwz r15,0(r14) /* instruction, now insert top */ | ||
944 | rlwimi r15,r11,16,16,31 /* half of pv const in low half*/ | ||
945 | stw r15,0(r14) /* of instruction and restore. */ | ||
946 | dcbst r0,r14 /* write it to memory */ | ||
947 | sync | ||
948 | icbi r0,r14 /* flush the icache line */ | ||
949 | cmpw r12,r13 | ||
950 | bne 1b | ||
951 | |||
952 | sync /* additional sync needed on g4 */ | ||
953 | isync /* No speculative loading until now */ | ||
954 | blr | ||
955 | |||
956 | /*********************************************************************** | ||
957 | * Please note that on APUS the exception handlers are located at the | ||
958 | * physical address 0xfff0000. For this reason, the exception handlers | ||
959 | * cannot use relative branches to access the code below. | ||
960 | ***********************************************************************/ | ||
961 | #endif /* CONFIG_APUS */ | ||
962 | |||
963 | #ifdef CONFIG_SMP | 864 | #ifdef CONFIG_SMP |
964 | #ifdef CONFIG_GEMINI | 865 | #ifdef CONFIG_GEMINI |
965 | .globl __secondary_start_gemini | 866 | .globl __secondary_start_gemini |
@@ -1135,19 +1036,6 @@ start_here: | |||
1135 | bl __save_cpu_setup | 1036 | bl __save_cpu_setup |
1136 | bl MMU_init | 1037 | bl MMU_init |
1137 | 1038 | ||
1138 | #ifdef CONFIG_APUS | ||
1139 | /* Copy exception code to exception vector base on APUS. */ | ||
1140 | lis r4,KERNELBASE@h | ||
1141 | #ifdef CONFIG_APUS_FAST_EXCEPT | ||
1142 | lis r3,0xfff0 /* Copy to 0xfff00000 */ | ||
1143 | #else | ||
1144 | lis r3,0 /* Copy to 0x00000000 */ | ||
1145 | #endif | ||
1146 | li r5,0x4000 /* # bytes of memory to copy */ | ||
1147 | li r6,0 | ||
1148 | bl copy_and_flush /* copy the first 0x4000 bytes */ | ||
1149 | #endif /* CONFIG_APUS */ | ||
1150 | |||
1151 | /* | 1039 | /* |
1152 | * Go back to running unmapped so we can load up new values | 1040 | * Go back to running unmapped so we can load up new values |
1153 | * for SDR1 (hash table pointer) and the segment registers | 1041 | * for SDR1 (hash table pointer) and the segment registers |
@@ -1324,11 +1212,7 @@ initial_bats: | |||
1324 | #else | 1212 | #else |
1325 | ori r8,r8,2 /* R/W access */ | 1213 | ori r8,r8,2 /* R/W access */ |
1326 | #endif /* CONFIG_SMP */ | 1214 | #endif /* CONFIG_SMP */ |
1327 | #ifdef CONFIG_APUS | ||
1328 | ori r11,r11,BL_8M<<2|0x2 /* set up 8MB BAT registers for 604 */ | ||
1329 | #else | ||
1330 | ori r11,r11,BL_256M<<2|0x2 /* set up BAT registers for 604 */ | 1215 | ori r11,r11,BL_256M<<2|0x2 /* set up BAT registers for 604 */ |
1331 | #endif /* CONFIG_APUS */ | ||
1332 | 1216 | ||
1333 | mtspr SPRN_DBAT0L,r8 /* N.B. 6xx (not 601) have valid */ | 1217 | mtspr SPRN_DBAT0L,r8 /* N.B. 6xx (not 601) have valid */ |
1334 | mtspr SPRN_DBAT0U,r11 /* bit in upper BAT register */ | 1218 | mtspr SPRN_DBAT0U,r11 /* bit in upper BAT register */ |
@@ -1338,7 +1222,7 @@ initial_bats: | |||
1338 | blr | 1222 | blr |
1339 | 1223 | ||
1340 | 1224 | ||
1341 | #if !defined(CONFIG_APUS) && defined(CONFIG_BOOTX_TEXT) | 1225 | #ifdef CONFIG_BOOTX_TEXT |
1342 | setup_disp_bat: | 1226 | setup_disp_bat: |
1343 | /* | 1227 | /* |
1344 | * setup the display bat prepared for us in prom.c | 1228 | * setup the display bat prepared for us in prom.c |
@@ -1362,7 +1246,7 @@ setup_disp_bat: | |||
1362 | 1: mtspr SPRN_IBAT3L,r8 | 1246 | 1: mtspr SPRN_IBAT3L,r8 |
1363 | mtspr SPRN_IBAT3U,r11 | 1247 | mtspr SPRN_IBAT3U,r11 |
1364 | blr | 1248 | blr |
1365 | #endif /* !defined(CONFIG_APUS) && defined(CONFIG_BOOTX_TEXT) */ | 1249 | #endif /* CONFIG_BOOTX_TEXT */ |
1366 | 1250 | ||
1367 | #ifdef CONFIG_8260 | 1251 | #ifdef CONFIG_8260 |
1368 | /* Jump into the system reset for the rom. | 1252 | /* Jump into the system reset for the rom. |