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authorKumar Gala <galak@kernel.crashing.org>2008-01-27 15:06:14 -0500
committerKumar Gala <galak@kernel.crashing.org>2008-01-28 09:33:10 -0500
commitc42f3ad7f1bf17f31c3febdc71034ed6d793d40f (patch)
tree5a56c44717cf8fe4a5f402370506e5fbb78368e4 /arch/ppc/kernel
parent3155f7f23f7865e64f7eb14e226a2dff8197e51f (diff)
[PPC] Remove 85xx from arch/ppc
85xx exists in arch/powerpc as well as cuImage support to boot from a u-boot that doesn't support device trees. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'arch/ppc/kernel')
-rw-r--r--arch/ppc/kernel/Makefile1
-rw-r--r--arch/ppc/kernel/asm-offsets.c6
-rw-r--r--arch/ppc/kernel/entry.S12
-rw-r--r--arch/ppc/kernel/head_booke.h55
-rw-r--r--arch/ppc/kernel/head_fsl_booke.S1065
-rw-r--r--arch/ppc/kernel/misc.S46
-rw-r--r--arch/ppc/kernel/ppc_ksyms.c8
-rw-r--r--arch/ppc/kernel/setup.c3
-rw-r--r--arch/ppc/kernel/traps.c121
9 files changed, 5 insertions, 1312 deletions
diff --git a/arch/ppc/kernel/Makefile b/arch/ppc/kernel/Makefile
index 5da0ca7c302f..7b739054968f 100644
--- a/arch/ppc/kernel/Makefile
+++ b/arch/ppc/kernel/Makefile
@@ -4,7 +4,6 @@
4extra-$(CONFIG_PPC_STD_MMU) := head.o 4extra-$(CONFIG_PPC_STD_MMU) := head.o
5extra-$(CONFIG_40x) := head_4xx.o 5extra-$(CONFIG_40x) := head_4xx.o
6extra-$(CONFIG_44x) := head_44x.o 6extra-$(CONFIG_44x) := head_44x.o
7extra-$(CONFIG_FSL_BOOKE) := head_fsl_booke.o
8extra-$(CONFIG_8xx) := head_8xx.o 7extra-$(CONFIG_8xx) := head_8xx.o
9extra-y += vmlinux.lds 8extra-y += vmlinux.lds
10 9
diff --git a/arch/ppc/kernel/asm-offsets.c b/arch/ppc/kernel/asm-offsets.c
index e8e94321b59e..a51a17714231 100644
--- a/arch/ppc/kernel/asm-offsets.c
+++ b/arch/ppc/kernel/asm-offsets.c
@@ -54,12 +54,6 @@ main(void)
54 DEFINE(THREAD_VSCR, offsetof(struct thread_struct, vscr)); 54 DEFINE(THREAD_VSCR, offsetof(struct thread_struct, vscr));
55 DEFINE(THREAD_USED_VR, offsetof(struct thread_struct, used_vr)); 55 DEFINE(THREAD_USED_VR, offsetof(struct thread_struct, used_vr));
56#endif /* CONFIG_ALTIVEC */ 56#endif /* CONFIG_ALTIVEC */
57#ifdef CONFIG_SPE
58 DEFINE(THREAD_EVR0, offsetof(struct thread_struct, evr[0]));
59 DEFINE(THREAD_ACC, offsetof(struct thread_struct, acc));
60 DEFINE(THREAD_SPEFSCR, offsetof(struct thread_struct, spefscr));
61 DEFINE(THREAD_USED_SPE, offsetof(struct thread_struct, used_spe));
62#endif /* CONFIG_SPE */
63 /* Interrupt register frame */ 57 /* Interrupt register frame */
64 DEFINE(STACK_FRAME_OVERHEAD, STACK_FRAME_OVERHEAD); 58 DEFINE(STACK_FRAME_OVERHEAD, STACK_FRAME_OVERHEAD);
65 DEFINE(INT_FRAME_SIZE, STACK_FRAME_OVERHEAD + sizeof(struct pt_regs)); 59 DEFINE(INT_FRAME_SIZE, STACK_FRAME_OVERHEAD + sizeof(struct pt_regs));
diff --git a/arch/ppc/kernel/entry.S b/arch/ppc/kernel/entry.S
index 59e77eb63338..5f3a5d068a5c 100644
--- a/arch/ppc/kernel/entry.S
+++ b/arch/ppc/kernel/entry.S
@@ -519,12 +519,7 @@ BEGIN_FTR_SECTION
519 stw r12,THREAD+THREAD_VRSAVE(r2) 519 stw r12,THREAD+THREAD_VRSAVE(r2)
520END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC) 520END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
521#endif /* CONFIG_ALTIVEC */ 521#endif /* CONFIG_ALTIVEC */
522#ifdef CONFIG_SPE 522 and. r0,r0,r11 /* FP or altivec enabled? */
523 oris r0,r0,MSR_SPE@h /* Disable SPE */
524 mfspr r12,SPRN_SPEFSCR /* save spefscr register value */
525 stw r12,THREAD+THREAD_SPEFSCR(r2)
526#endif /* CONFIG_SPE */
527 and. r0,r0,r11 /* FP or altivec or SPE enabled? */
528 beq+ 1f 523 beq+ 1f
529 andc r11,r11,r0 524 andc r11,r11,r0
530 MTMSRD(r11) 525 MTMSRD(r11)
@@ -557,11 +552,6 @@ BEGIN_FTR_SECTION
557 mtspr SPRN_VRSAVE,r0 /* if G4, restore VRSAVE reg */ 552 mtspr SPRN_VRSAVE,r0 /* if G4, restore VRSAVE reg */
558END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC) 553END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
559#endif /* CONFIG_ALTIVEC */ 554#endif /* CONFIG_ALTIVEC */
560#ifdef CONFIG_SPE
561 lwz r0,THREAD+THREAD_SPEFSCR(r2)
562 mtspr SPRN_SPEFSCR,r0 /* restore SPEFSCR reg */
563#endif /* CONFIG_SPE */
564
565 lwz r0,_CCR(r1) 555 lwz r0,_CCR(r1)
566 mtcrf 0xFF,r0 556 mtcrf 0xFF,r0
567 /* r3-r12 are destroyed -- Cort */ 557 /* r3-r12 are destroyed -- Cort */
diff --git a/arch/ppc/kernel/head_booke.h b/arch/ppc/kernel/head_booke.h
index f3d274c6b231..166d597b6db2 100644
--- a/arch/ppc/kernel/head_booke.h
+++ b/arch/ppc/kernel/head_booke.h
@@ -212,60 +212,6 @@ label:
212 * save (and later restore) the MSR via SPRN_CSRR1, which will still have 212 * save (and later restore) the MSR via SPRN_CSRR1, which will still have
213 * the MSR_DE bit set. 213 * the MSR_DE bit set.
214 */ 214 */
215#ifdef CONFIG_E200
216#define DEBUG_EXCEPTION \
217 START_EXCEPTION(Debug); \
218 DEBUG_EXCEPTION_PROLOG; \
219 \
220 /* \
221 * If there is a single step or branch-taken exception in an \
222 * exception entry sequence, it was probably meant to apply to \
223 * the code where the exception occurred (since exception entry \
224 * doesn't turn off DE automatically). We simulate the effect \
225 * of turning off DE on entry to an exception handler by turning \
226 * off DE in the CSRR1 value and clearing the debug status. \
227 */ \
228 mfspr r10,SPRN_DBSR; /* check single-step/branch taken */ \
229 andis. r10,r10,DBSR_IC@h; \
230 beq+ 2f; \
231 \
232 lis r10,KERNELBASE@h; /* check if exception in vectors */ \
233 ori r10,r10,KERNELBASE@l; \
234 cmplw r12,r10; \
235 blt+ 2f; /* addr below exception vectors */ \
236 \
237 lis r10,Debug@h; \
238 ori r10,r10,Debug@l; \
239 cmplw r12,r10; \
240 bgt+ 2f; /* addr above exception vectors */ \
241 \
242 /* here it looks like we got an inappropriate debug exception. */ \
2431: rlwinm r9,r9,0,~MSR_DE; /* clear DE in the CDRR1 value */ \
244 lis r10,DBSR_IC@h; /* clear the IC event */ \
245 mtspr SPRN_DBSR,r10; \
246 /* restore state and get out */ \
247 lwz r10,_CCR(r11); \
248 lwz r0,GPR0(r11); \
249 lwz r1,GPR1(r11); \
250 mtcrf 0x80,r10; \
251 mtspr SPRN_DSRR0,r12; \
252 mtspr SPRN_DSRR1,r9; \
253 lwz r9,GPR9(r11); \
254 lwz r12,GPR12(r11); \
255 mtspr DEBUG_SPRG,r8; \
256 BOOKE_LOAD_EXC_LEVEL_STACK(DEBUG); /* r8 points to the debug stack */ \
257 lwz r10,GPR10-INT_FRAME_SIZE(r8); \
258 lwz r11,GPR11-INT_FRAME_SIZE(r8); \
259 mfspr r8,DEBUG_SPRG; \
260 \
261 RFDI; \
262 b .; \
263 \
264 /* continue normal handling for a critical exception... */ \
2652: mfspr r4,SPRN_DBSR; \
266 addi r3,r1,STACK_FRAME_OVERHEAD; \
267 EXC_XFER_TEMPLATE(DebugException, 0x2002, (MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE)), NOCOPY, debug_transfer_to_handler, ret_from_debug_exc)
268#else
269#define DEBUG_EXCEPTION \ 215#define DEBUG_EXCEPTION \
270 START_EXCEPTION(Debug); \ 216 START_EXCEPTION(Debug); \
271 CRITICAL_EXCEPTION_PROLOG; \ 217 CRITICAL_EXCEPTION_PROLOG; \
@@ -318,7 +264,6 @@ label:
3182: mfspr r4,SPRN_DBSR; \ 2642: mfspr r4,SPRN_DBSR; \
319 addi r3,r1,STACK_FRAME_OVERHEAD; \ 265 addi r3,r1,STACK_FRAME_OVERHEAD; \
320 EXC_XFER_TEMPLATE(DebugException, 0x2002, (MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE)), NOCOPY, crit_transfer_to_handler, ret_from_crit_exc) 266 EXC_XFER_TEMPLATE(DebugException, 0x2002, (MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE)), NOCOPY, crit_transfer_to_handler, ret_from_crit_exc)
321#endif
322 267
323#define INSTRUCTION_STORAGE_EXCEPTION \ 268#define INSTRUCTION_STORAGE_EXCEPTION \
324 START_EXCEPTION(InstructionStorage) \ 269 START_EXCEPTION(InstructionStorage) \
diff --git a/arch/ppc/kernel/head_fsl_booke.S b/arch/ppc/kernel/head_fsl_booke.S
deleted file mode 100644
index 1f155d399d57..000000000000
--- a/arch/ppc/kernel/head_fsl_booke.S
+++ /dev/null
@@ -1,1065 +0,0 @@
1/*
2 * Kernel execution entry point code.
3 *
4 * Copyright (c) 1995-1996 Gary Thomas <gdt@linuxppc.org>
5 * Initial PowerPC version.
6 * Copyright (c) 1996 Cort Dougan <cort@cs.nmt.edu>
7 * Rewritten for PReP
8 * Copyright (c) 1996 Paul Mackerras <paulus@cs.anu.edu.au>
9 * Low-level exception handers, MMU support, and rewrite.
10 * Copyright (c) 1997 Dan Malek <dmalek@jlc.net>
11 * PowerPC 8xx modifications.
12 * Copyright (c) 1998-1999 TiVo, Inc.
13 * PowerPC 403GCX modifications.
14 * Copyright (c) 1999 Grant Erickson <grant@lcse.umn.edu>
15 * PowerPC 403GCX/405GP modifications.
16 * Copyright 2000 MontaVista Software Inc.
17 * PPC405 modifications
18 * PowerPC 403GCX/405GP modifications.
19 * Author: MontaVista Software, Inc.
20 * frank_rowand@mvista.com or source@mvista.com
21 * debbie_chu@mvista.com
22 * Copyright 2002-2004 MontaVista Software, Inc.
23 * PowerPC 44x support, Matt Porter <mporter@kernel.crashing.org>
24 * Copyright 2004 Freescale Semiconductor, Inc
25 * PowerPC e500 modifications, Kumar Gala <galak@kernel.crashing.org>
26 *
27 * This program is free software; you can redistribute it and/or modify it
28 * under the terms of the GNU General Public License as published by the
29 * Free Software Foundation; either version 2 of the License, or (at your
30 * option) any later version.
31 */
32
33#include <linux/threads.h>
34#include <asm/processor.h>
35#include <asm/page.h>
36#include <asm/mmu.h>
37#include <asm/pgtable.h>
38#include <asm/cputable.h>
39#include <asm/thread_info.h>
40#include <asm/ppc_asm.h>
41#include <asm/asm-offsets.h>
42#include "head_booke.h"
43
44/* As with the other PowerPC ports, it is expected that when code
45 * execution begins here, the following registers contain valid, yet
46 * optional, information:
47 *
48 * r3 - Board info structure pointer (DRAM, frequency, MAC address, etc.)
49 * r4 - Starting address of the init RAM disk
50 * r5 - Ending address of the init RAM disk
51 * r6 - Start of kernel command line string (e.g. "mem=128")
52 * r7 - End of kernel command line string
53 *
54 */
55 .text
56_GLOBAL(_stext)
57_GLOBAL(_start)
58 /*
59 * Reserve a word at a fixed location to store the address
60 * of abatron_pteptrs
61 */
62 nop
63/*
64 * Save parameters we are passed
65 */
66 mr r31,r3
67 mr r30,r4
68 mr r29,r5
69 mr r28,r6
70 mr r27,r7
71 li r24,0 /* CPU number */
72
73/* We try to not make any assumptions about how the boot loader
74 * setup or used the TLBs. We invalidate all mappings from the
75 * boot loader and load a single entry in TLB1[0] to map the
76 * first 16M of kernel memory. Any boot info passed from the
77 * bootloader needs to live in this first 16M.
78 *
79 * Requirement on bootloader:
80 * - The page we're executing in needs to reside in TLB1 and
81 * have IPROT=1. If not an invalidate broadcast could
82 * evict the entry we're currently executing in.
83 *
84 * r3 = Index of TLB1 were executing in
85 * r4 = Current MSR[IS]
86 * r5 = Index of TLB1 temp mapping
87 *
88 * Later in mapin_ram we will correctly map lowmem, and resize TLB1[0]
89 * if needed
90 */
91
92/* 1. Find the index of the entry we're executing in */
93 bl invstr /* Find our address */
94invstr: mflr r6 /* Make it accessible */
95 mfmsr r7
96 rlwinm r4,r7,27,31,31 /* extract MSR[IS] */
97 mfspr r7, SPRN_PID0
98 slwi r7,r7,16
99 or r7,r7,r4
100 mtspr SPRN_MAS6,r7
101 tlbsx 0,r6 /* search MSR[IS], SPID=PID0 */
102#ifndef CONFIG_E200
103 mfspr r7,SPRN_MAS1
104 andis. r7,r7,MAS1_VALID@h
105 bne match_TLB
106 mfspr r7,SPRN_PID1
107 slwi r7,r7,16
108 or r7,r7,r4
109 mtspr SPRN_MAS6,r7
110 tlbsx 0,r6 /* search MSR[IS], SPID=PID1 */
111 mfspr r7,SPRN_MAS1
112 andis. r7,r7,MAS1_VALID@h
113 bne match_TLB
114 mfspr r7, SPRN_PID2
115 slwi r7,r7,16
116 or r7,r7,r4
117 mtspr SPRN_MAS6,r7
118 tlbsx 0,r6 /* Fall through, we had to match */
119#endif
120match_TLB:
121 mfspr r7,SPRN_MAS0
122 rlwinm r3,r7,16,20,31 /* Extract MAS0(Entry) */
123
124 mfspr r7,SPRN_MAS1 /* Insure IPROT set */
125 oris r7,r7,MAS1_IPROT@h
126 mtspr SPRN_MAS1,r7
127 tlbwe
128
129/* 2. Invalidate all entries except the entry we're executing in */
130 mfspr r9,SPRN_TLB1CFG
131 andi. r9,r9,0xfff
132 li r6,0 /* Set Entry counter to 0 */
1331: lis r7,0x1000 /* Set MAS0(TLBSEL) = 1 */
134 rlwimi r7,r6,16,4,15 /* Setup MAS0 = TLBSEL | ESEL(r6) */
135 mtspr SPRN_MAS0,r7
136 tlbre
137 mfspr r7,SPRN_MAS1
138 rlwinm r7,r7,0,2,31 /* Clear MAS1 Valid and IPROT */
139 cmpw r3,r6
140 beq skpinv /* Dont update the current execution TLB */
141 mtspr SPRN_MAS1,r7
142 tlbwe
143 isync
144skpinv: addi r6,r6,1 /* Increment */
145 cmpw r6,r9 /* Are we done? */
146 bne 1b /* If not, repeat */
147
148 /* Invalidate TLB0 */
149 li r6,0x04
150 tlbivax 0,r6
151#ifdef CONFIG_SMP
152 tlbsync
153#endif
154 /* Invalidate TLB1 */
155 li r6,0x0c
156 tlbivax 0,r6
157#ifdef CONFIG_SMP
158 tlbsync
159#endif
160 msync
161
162/* 3. Setup a temp mapping and jump to it */
163 andi. r5, r3, 0x1 /* Find an entry not used and is non-zero */
164 addi r5, r5, 0x1
165 lis r7,0x1000 /* Set MAS0(TLBSEL) = 1 */
166 rlwimi r7,r3,16,4,15 /* Setup MAS0 = TLBSEL | ESEL(r3) */
167 mtspr SPRN_MAS0,r7
168 tlbre
169
170 /* Just modify the entry ID and EPN for the temp mapping */
171 lis r7,0x1000 /* Set MAS0(TLBSEL) = 1 */
172 rlwimi r7,r5,16,4,15 /* Setup MAS0 = TLBSEL | ESEL(r5) */
173 mtspr SPRN_MAS0,r7
174 xori r6,r4,1 /* Setup TMP mapping in the other Address space */
175 slwi r6,r6,12
176 oris r6,r6,(MAS1_VALID|MAS1_IPROT)@h
177 ori r6,r6,(MAS1_TSIZE(BOOKE_PAGESZ_4K))@l
178 mtspr SPRN_MAS1,r6
179 mfspr r6,SPRN_MAS2
180 li r7,0 /* temp EPN = 0 */
181 rlwimi r7,r6,0,20,31
182 mtspr SPRN_MAS2,r7
183 tlbwe
184
185 xori r6,r4,1
186 slwi r6,r6,5 /* setup new context with other address space */
187 bl 1f /* Find our address */
1881: mflr r9
189 rlwimi r7,r9,0,20,31
190 addi r7,r7,24
191 mtspr SPRN_SRR0,r7
192 mtspr SPRN_SRR1,r6
193 rfi
194
195/* 4. Clear out PIDs & Search info */
196 li r6,0
197 mtspr SPRN_PID0,r6
198#ifndef CONFIG_E200
199 mtspr SPRN_PID1,r6
200 mtspr SPRN_PID2,r6
201#endif
202 mtspr SPRN_MAS6,r6
203
204/* 5. Invalidate mapping we started in */
205 lis r7,0x1000 /* Set MAS0(TLBSEL) = 1 */
206 rlwimi r7,r3,16,4,15 /* Setup MAS0 = TLBSEL | ESEL(r3) */
207 mtspr SPRN_MAS0,r7
208 tlbre
209 mfspr r6,SPRN_MAS1
210 rlwinm r6,r6,0,2,0 /* clear IPROT */
211 mtspr SPRN_MAS1,r6
212 tlbwe
213 /* Invalidate TLB1 */
214 li r9,0x0c
215 tlbivax 0,r9
216#ifdef CONFIG_SMP
217 tlbsync
218#endif
219 msync
220
221/* 6. Setup KERNELBASE mapping in TLB1[0] */
222 lis r6,0x1000 /* Set MAS0(TLBSEL) = TLB1(1), ESEL = 0 */
223 mtspr SPRN_MAS0,r6
224 lis r6,(MAS1_VALID|MAS1_IPROT)@h
225 ori r6,r6,(MAS1_TSIZE(BOOKE_PAGESZ_16M))@l
226 mtspr SPRN_MAS1,r6
227 li r7,0
228 lis r6,KERNELBASE@h
229 ori r6,r6,KERNELBASE@l
230 rlwimi r6,r7,0,20,31
231 mtspr SPRN_MAS2,r6
232 li r7,(MAS3_SX|MAS3_SW|MAS3_SR)
233 mtspr SPRN_MAS3,r7
234 tlbwe
235
236/* 7. Jump to KERNELBASE mapping */
237 lis r7,MSR_KERNEL@h
238 ori r7,r7,MSR_KERNEL@l
239 bl 1f /* Find our address */
2401: mflr r9
241 rlwimi r6,r9,0,20,31
242 addi r6,r6,24
243 mtspr SPRN_SRR0,r6
244 mtspr SPRN_SRR1,r7
245 rfi /* start execution out of TLB1[0] entry */
246
247/* 8. Clear out the temp mapping */
248 lis r7,0x1000 /* Set MAS0(TLBSEL) = 1 */
249 rlwimi r7,r5,16,4,15 /* Setup MAS0 = TLBSEL | ESEL(r5) */
250 mtspr SPRN_MAS0,r7
251 tlbre
252 mfspr r8,SPRN_MAS1
253 rlwinm r8,r8,0,2,0 /* clear IPROT */
254 mtspr SPRN_MAS1,r8
255 tlbwe
256 /* Invalidate TLB1 */
257 li r9,0x0c
258 tlbivax 0,r9
259#ifdef CONFIG_SMP
260 tlbsync
261#endif
262 msync
263
264 /* Establish the interrupt vector offsets */
265 SET_IVOR(0, CriticalInput);
266 SET_IVOR(1, MachineCheck);
267 SET_IVOR(2, DataStorage);
268 SET_IVOR(3, InstructionStorage);
269 SET_IVOR(4, ExternalInput);
270 SET_IVOR(5, Alignment);
271 SET_IVOR(6, Program);
272 SET_IVOR(7, FloatingPointUnavailable);
273 SET_IVOR(8, SystemCall);
274 SET_IVOR(9, AuxillaryProcessorUnavailable);
275 SET_IVOR(10, Decrementer);
276 SET_IVOR(11, FixedIntervalTimer);
277 SET_IVOR(12, WatchdogTimer);
278 SET_IVOR(13, DataTLBError);
279 SET_IVOR(14, InstructionTLBError);
280 SET_IVOR(15, Debug);
281 SET_IVOR(32, SPEUnavailable);
282 SET_IVOR(33, SPEFloatingPointData);
283 SET_IVOR(34, SPEFloatingPointRound);
284#ifndef CONFIG_E200
285 SET_IVOR(35, PerformanceMonitor);
286#endif
287
288 /* Establish the interrupt vector base */
289 lis r4,interrupt_base@h /* IVPR only uses the high 16-bits */
290 mtspr SPRN_IVPR,r4
291
292 /* Setup the defaults for TLB entries */
293 li r2,(MAS4_TSIZED(BOOKE_PAGESZ_4K))@l
294#ifdef CONFIG_E200
295 oris r2,r2,MAS4_TLBSELD(1)@h
296#endif
297 mtspr SPRN_MAS4, r2
298
299#if 0
300 /* Enable DOZE */
301 mfspr r2,SPRN_HID0
302 oris r2,r2,HID0_DOZE@h
303 mtspr SPRN_HID0, r2
304#endif
305#ifdef CONFIG_E200
306 /* enable dedicated debug exception handling resources (Debug APU) */
307 mfspr r2,SPRN_HID0
308 ori r2,r2,HID0_DAPUEN@l
309 mtspr SPRN_HID0,r2
310#endif
311
312#if !defined(CONFIG_BDI_SWITCH)
313 /*
314 * The Abatron BDI JTAG debugger does not tolerate others
315 * mucking with the debug registers.
316 */
317 lis r2,DBCR0_IDM@h
318 mtspr SPRN_DBCR0,r2
319 isync
320 /* clear any residual debug events */
321 li r2,-1
322 mtspr SPRN_DBSR,r2
323#endif
324
325 /*
326 * This is where the main kernel code starts.
327 */
328
329 /* ptr to current */
330 lis r2,init_task@h
331 ori r2,r2,init_task@l
332
333 /* ptr to current thread */
334 addi r4,r2,THREAD /* init task's THREAD */
335 mtspr SPRN_SPRG3,r4
336
337 /* stack */
338 lis r1,init_thread_union@h
339 ori r1,r1,init_thread_union@l
340 li r0,0
341 stwu r0,THREAD_SIZE-STACK_FRAME_OVERHEAD(r1)
342
343 bl early_init
344
345 mfspr r3,SPRN_TLB1CFG
346 andi. r3,r3,0xfff
347 lis r4,num_tlbcam_entries@ha
348 stw r3,num_tlbcam_entries@l(r4)
349/*
350 * Decide what sort of machine this is and initialize the MMU.
351 */
352 mr r3,r31
353 mr r4,r30
354 mr r5,r29
355 mr r6,r28
356 mr r7,r27
357 bl machine_init
358 bl MMU_init
359
360 /* Setup PTE pointers for the Abatron bdiGDB */
361 lis r6, swapper_pg_dir@h
362 ori r6, r6, swapper_pg_dir@l
363 lis r5, abatron_pteptrs@h
364 ori r5, r5, abatron_pteptrs@l
365 lis r4, KERNELBASE@h
366 ori r4, r4, KERNELBASE@l
367 stw r5, 0(r4) /* Save abatron_pteptrs at a fixed location */
368 stw r6, 0(r5)
369
370 /* Let's move on */
371 lis r4,start_kernel@h
372 ori r4,r4,start_kernel@l
373 lis r3,MSR_KERNEL@h
374 ori r3,r3,MSR_KERNEL@l
375 mtspr SPRN_SRR0,r4
376 mtspr SPRN_SRR1,r3
377 rfi /* change context and jump to start_kernel */
378
379/* Macros to hide the PTE size differences
380 *
381 * FIND_PTE -- walks the page tables given EA & pgdir pointer
382 * r10 -- EA of fault
383 * r11 -- PGDIR pointer
384 * r12 -- free
385 * label 2: is the bailout case
386 *
387 * if we find the pte (fall through):
388 * r11 is low pte word
389 * r12 is pointer to the pte
390 */
391#ifdef CONFIG_PTE_64BIT
392#define PTE_FLAGS_OFFSET 4
393#define FIND_PTE \
394 rlwinm r12, r10, 13, 19, 29; /* Compute pgdir/pmd offset */ \
395 lwzx r11, r12, r11; /* Get pgd/pmd entry */ \
396 rlwinm. r12, r11, 0, 0, 20; /* Extract pt base address */ \
397 beq 2f; /* Bail if no table */ \
398 rlwimi r12, r10, 23, 20, 28; /* Compute pte address */ \
399 lwz r11, 4(r12); /* Get pte entry */
400#else
401#define PTE_FLAGS_OFFSET 0
402#define FIND_PTE \
403 rlwimi r11, r10, 12, 20, 29; /* Create L1 (pgdir/pmd) address */ \
404 lwz r11, 0(r11); /* Get L1 entry */ \
405 rlwinm. r12, r11, 0, 0, 19; /* Extract L2 (pte) base address */ \
406 beq 2f; /* Bail if no table */ \
407 rlwimi r12, r10, 22, 20, 29; /* Compute PTE address */ \
408 lwz r11, 0(r12); /* Get Linux PTE */
409#endif
410
411/*
412 * Interrupt vector entry code
413 *
414 * The Book E MMUs are always on so we don't need to handle
415 * interrupts in real mode as with previous PPC processors. In
416 * this case we handle interrupts in the kernel virtual address
417 * space.
418 *
419 * Interrupt vectors are dynamically placed relative to the
420 * interrupt prefix as determined by the address of interrupt_base.
421 * The interrupt vectors offsets are programmed using the labels
422 * for each interrupt vector entry.
423 *
424 * Interrupt vectors must be aligned on a 16 byte boundary.
425 * We align on a 32 byte cache line boundary for good measure.
426 */
427
428interrupt_base:
429 /* Critical Input Interrupt */
430 CRITICAL_EXCEPTION(0x0100, CriticalInput, unknown_exception)
431
432 /* Machine Check Interrupt */
433#ifdef CONFIG_E200
434 /* no RFMCI, MCSRRs on E200 */
435 CRITICAL_EXCEPTION(0x0200, MachineCheck, machine_check_exception)
436#else
437 MCHECK_EXCEPTION(0x0200, MachineCheck, machine_check_exception)
438#endif
439
440 /* Data Storage Interrupt */
441 START_EXCEPTION(DataStorage)
442 mtspr SPRN_SPRG0, r10 /* Save some working registers */
443 mtspr SPRN_SPRG1, r11
444 mtspr SPRN_SPRG4W, r12
445 mtspr SPRN_SPRG5W, r13
446 mfcr r11
447 mtspr SPRN_SPRG7W, r11
448
449 /*
450 * Check if it was a store fault, if not then bail
451 * because a user tried to access a kernel or
452 * read-protected page. Otherwise, get the
453 * offending address and handle it.
454 */
455 mfspr r10, SPRN_ESR
456 andis. r10, r10, ESR_ST@h
457 beq 2f
458
459 mfspr r10, SPRN_DEAR /* Get faulting address */
460
461 /* If we are faulting a kernel address, we have to use the
462 * kernel page tables.
463 */
464 lis r11, TASK_SIZE@h
465 ori r11, r11, TASK_SIZE@l
466 cmplw 0, r10, r11
467 bge 2f
468
469 /* Get the PGD for the current thread */
4703:
471 mfspr r11,SPRN_SPRG3
472 lwz r11,PGDIR(r11)
4734:
474 FIND_PTE
475
476 /* Are _PAGE_USER & _PAGE_RW set & _PAGE_HWWRITE not? */
477 andi. r13, r11, _PAGE_RW|_PAGE_USER|_PAGE_HWWRITE
478 cmpwi 0, r13, _PAGE_RW|_PAGE_USER
479 bne 2f /* Bail if not */
480
481 /* Update 'changed'. */
482 ori r11, r11, _PAGE_DIRTY|_PAGE_ACCESSED|_PAGE_HWWRITE
483 stw r11, PTE_FLAGS_OFFSET(r12) /* Update Linux page table */
484
485 /* MAS2 not updated as the entry does exist in the tlb, this
486 fault taken to detect state transition (eg: COW -> DIRTY)
487 */
488 andi. r11, r11, _PAGE_HWEXEC
489 rlwimi r11, r11, 31, 27, 27 /* SX <- _PAGE_HWEXEC */
490 ori r11, r11, (MAS3_UW|MAS3_SW|MAS3_UR|MAS3_SR)@l /* set static perms */
491
492 /* update search PID in MAS6, AS = 0 */
493 mfspr r12, SPRN_PID0
494 slwi r12, r12, 16
495 mtspr SPRN_MAS6, r12
496
497 /* find the TLB index that caused the fault. It has to be here. */
498 tlbsx 0, r10
499
500 /* only update the perm bits, assume the RPN is fine */
501 mfspr r12, SPRN_MAS3
502 rlwimi r12, r11, 0, 20, 31
503 mtspr SPRN_MAS3,r12
504 tlbwe
505
506 /* Done...restore registers and get out of here. */
507 mfspr r11, SPRN_SPRG7R
508 mtcr r11
509 mfspr r13, SPRN_SPRG5R
510 mfspr r12, SPRN_SPRG4R
511 mfspr r11, SPRN_SPRG1
512 mfspr r10, SPRN_SPRG0
513 rfi /* Force context change */
514
5152:
516 /*
517 * The bailout. Restore registers to pre-exception conditions
518 * and call the heavyweights to help us out.
519 */
520 mfspr r11, SPRN_SPRG7R
521 mtcr r11
522 mfspr r13, SPRN_SPRG5R
523 mfspr r12, SPRN_SPRG4R
524 mfspr r11, SPRN_SPRG1
525 mfspr r10, SPRN_SPRG0
526 b data_access
527
528 /* Instruction Storage Interrupt */
529 INSTRUCTION_STORAGE_EXCEPTION
530
531 /* External Input Interrupt */
532 EXCEPTION(0x0500, ExternalInput, do_IRQ, EXC_XFER_LITE)
533
534 /* Alignment Interrupt */
535 ALIGNMENT_EXCEPTION
536
537 /* Program Interrupt */
538 PROGRAM_EXCEPTION
539
540 /* Floating Point Unavailable Interrupt */
541#ifdef CONFIG_PPC_FPU
542 FP_UNAVAILABLE_EXCEPTION
543#else
544#ifdef CONFIG_E200
545 /* E200 treats 'normal' floating point instructions as FP Unavail exception */
546 EXCEPTION(0x0800, FloatingPointUnavailable, program_check_exception, EXC_XFER_EE)
547#else
548 EXCEPTION(0x0800, FloatingPointUnavailable, unknown_exception, EXC_XFER_EE)
549#endif
550#endif
551
552 /* System Call Interrupt */
553 START_EXCEPTION(SystemCall)
554 NORMAL_EXCEPTION_PROLOG
555 EXC_XFER_EE_LITE(0x0c00, DoSyscall)
556
557 /* Auxillary Processor Unavailable Interrupt */
558 EXCEPTION(0x2900, AuxillaryProcessorUnavailable, unknown_exception, EXC_XFER_EE)
559
560 /* Decrementer Interrupt */
561 DECREMENTER_EXCEPTION
562
563 /* Fixed Internal Timer Interrupt */
564 /* TODO: Add FIT support */
565 EXCEPTION(0x3100, FixedIntervalTimer, unknown_exception, EXC_XFER_EE)
566
567 /* Watchdog Timer Interrupt */
568#ifdef CONFIG_BOOKE_WDT
569 CRITICAL_EXCEPTION(0x3200, WatchdogTimer, WatchdogException)
570#else
571 CRITICAL_EXCEPTION(0x3200, WatchdogTimer, unknown_exception)
572#endif
573
574 /* Data TLB Error Interrupt */
575 START_EXCEPTION(DataTLBError)
576 mtspr SPRN_SPRG0, r10 /* Save some working registers */
577 mtspr SPRN_SPRG1, r11
578 mtspr SPRN_SPRG4W, r12
579 mtspr SPRN_SPRG5W, r13
580 mfcr r11
581 mtspr SPRN_SPRG7W, r11
582 mfspr r10, SPRN_DEAR /* Get faulting address */
583
584 /* If we are faulting a kernel address, we have to use the
585 * kernel page tables.
586 */
587 lis r11, TASK_SIZE@h
588 ori r11, r11, TASK_SIZE@l
589 cmplw 5, r10, r11
590 blt 5, 3f
591 lis r11, swapper_pg_dir@h
592 ori r11, r11, swapper_pg_dir@l
593
594 mfspr r12,SPRN_MAS1 /* Set TID to 0 */
595 rlwinm r12,r12,0,16,1
596 mtspr SPRN_MAS1,r12
597
598 b 4f
599
600 /* Get the PGD for the current thread */
6013:
602 mfspr r11,SPRN_SPRG3
603 lwz r11,PGDIR(r11)
604
6054:
606 FIND_PTE
607 andi. r13, r11, _PAGE_PRESENT /* Is the page present? */
608 beq 2f /* Bail if not present */
609
610#ifdef CONFIG_PTE_64BIT
611 lwz r13, 0(r12)
612#endif
613 ori r11, r11, _PAGE_ACCESSED
614 stw r11, PTE_FLAGS_OFFSET(r12)
615
616 /* Jump to common tlb load */
617 b finish_tlb_load
6182:
619 /* The bailout. Restore registers to pre-exception conditions
620 * and call the heavyweights to help us out.
621 */
622 mfspr r11, SPRN_SPRG7R
623 mtcr r11
624 mfspr r13, SPRN_SPRG5R
625 mfspr r12, SPRN_SPRG4R
626 mfspr r11, SPRN_SPRG1
627 mfspr r10, SPRN_SPRG0
628 b data_access
629
630 /* Instruction TLB Error Interrupt */
631 /*
632 * Nearly the same as above, except we get our
633 * information from different registers and bailout
634 * to a different point.
635 */
636 START_EXCEPTION(InstructionTLBError)
637 mtspr SPRN_SPRG0, r10 /* Save some working registers */
638 mtspr SPRN_SPRG1, r11
639 mtspr SPRN_SPRG4W, r12
640 mtspr SPRN_SPRG5W, r13
641 mfcr r11
642 mtspr SPRN_SPRG7W, r11
643 mfspr r10, SPRN_SRR0 /* Get faulting address */
644
645 /* If we are faulting a kernel address, we have to use the
646 * kernel page tables.
647 */
648 lis r11, TASK_SIZE@h
649 ori r11, r11, TASK_SIZE@l
650 cmplw 5, r10, r11
651 blt 5, 3f
652 lis r11, swapper_pg_dir@h
653 ori r11, r11, swapper_pg_dir@l
654
655 mfspr r12,SPRN_MAS1 /* Set TID to 0 */
656 rlwinm r12,r12,0,16,1
657 mtspr SPRN_MAS1,r12
658
659 b 4f
660
661 /* Get the PGD for the current thread */
6623:
663 mfspr r11,SPRN_SPRG3
664 lwz r11,PGDIR(r11)
665
6664:
667 FIND_PTE
668 andi. r13, r11, _PAGE_PRESENT /* Is the page present? */
669 beq 2f /* Bail if not present */
670
671#ifdef CONFIG_PTE_64BIT
672 lwz r13, 0(r12)
673#endif
674 ori r11, r11, _PAGE_ACCESSED
675 stw r11, PTE_FLAGS_OFFSET(r12)
676
677 /* Jump to common TLB load point */
678 b finish_tlb_load
679
6802:
681 /* The bailout. Restore registers to pre-exception conditions
682 * and call the heavyweights to help us out.
683 */
684 mfspr r11, SPRN_SPRG7R
685 mtcr r11
686 mfspr r13, SPRN_SPRG5R
687 mfspr r12, SPRN_SPRG4R
688 mfspr r11, SPRN_SPRG1
689 mfspr r10, SPRN_SPRG0
690 b InstructionStorage
691
692#ifdef CONFIG_SPE
693 /* SPE Unavailable */
694 START_EXCEPTION(SPEUnavailable)
695 NORMAL_EXCEPTION_PROLOG
696 bne load_up_spe
697 addi r3,r1,STACK_FRAME_OVERHEAD
698 EXC_XFER_EE_LITE(0x2010, KernelSPE)
699#else
700 EXCEPTION(0x2020, SPEUnavailable, unknown_exception, EXC_XFER_EE)
701#endif /* CONFIG_SPE */
702
703 /* SPE Floating Point Data */
704#ifdef CONFIG_SPE
705 EXCEPTION(0x2030, SPEFloatingPointData, SPEFloatingPointException, EXC_XFER_EE);
706#else
707 EXCEPTION(0x2040, SPEFloatingPointData, unknown_exception, EXC_XFER_EE)
708#endif /* CONFIG_SPE */
709
710 /* SPE Floating Point Round */
711 EXCEPTION(0x2050, SPEFloatingPointRound, unknown_exception, EXC_XFER_EE)
712
713 /* Performance Monitor */
714 EXCEPTION(0x2060, PerformanceMonitor, performance_monitor_exception, EXC_XFER_STD)
715
716
717 /* Debug Interrupt */
718 DEBUG_EXCEPTION
719
720/*
721 * Local functions
722 */
723
724 /*
725 * Data TLB exceptions will bail out to this point
726 * if they can't resolve the lightweight TLB fault.
727 */
728data_access:
729 NORMAL_EXCEPTION_PROLOG
730 mfspr r5,SPRN_ESR /* Grab the ESR, save it, pass arg3 */
731 stw r5,_ESR(r11)
732 mfspr r4,SPRN_DEAR /* Grab the DEAR, save it, pass arg2 */
733 andis. r10,r5,(ESR_ILK|ESR_DLK)@h
734 bne 1f
735 EXC_XFER_EE_LITE(0x0300, handle_page_fault)
7361:
737 addi r3,r1,STACK_FRAME_OVERHEAD
738 EXC_XFER_EE_LITE(0x0300, CacheLockingException)
739
740/*
741
742 * Both the instruction and data TLB miss get to this
743 * point to load the TLB.
744 * r10 - EA of fault
745 * r11 - TLB (info from Linux PTE)
746 * r12, r13 - available to use
747 * CR5 - results of addr < TASK_SIZE
748 * MAS0, MAS1 - loaded with proper value when we get here
749 * MAS2, MAS3 - will need additional info from Linux PTE
750 * Upon exit, we reload everything and RFI.
751 */
752finish_tlb_load:
753 /*
754 * We set execute, because we don't have the granularity to
755 * properly set this at the page level (Linux problem).
756 * Many of these bits are software only. Bits we don't set
757 * here we (properly should) assume have the appropriate value.
758 */
759
760 mfspr r12, SPRN_MAS2
761#ifdef CONFIG_PTE_64BIT
762 rlwimi r12, r11, 26, 24, 31 /* extract ...WIMGE from pte */
763#else
764 rlwimi r12, r11, 26, 27, 31 /* extract WIMGE from pte */
765#endif
766 mtspr SPRN_MAS2, r12
767
768 bge 5, 1f
769
770 /* is user addr */
771 andi. r12, r11, (_PAGE_USER | _PAGE_HWWRITE | _PAGE_HWEXEC)
772 andi. r10, r11, _PAGE_USER /* Test for _PAGE_USER */
773 srwi r10, r12, 1
774 or r12, r12, r10 /* Copy user perms into supervisor */
775 iseleq r12, 0, r12
776 b 2f
777
778 /* is kernel addr */
7791: rlwinm r12, r11, 31, 29, 29 /* Extract _PAGE_HWWRITE into SW */
780 ori r12, r12, (MAS3_SX | MAS3_SR)
781
782#ifdef CONFIG_PTE_64BIT
7832: rlwimi r12, r13, 24, 0, 7 /* grab RPN[32:39] */
784 rlwimi r12, r11, 24, 8, 19 /* grab RPN[40:51] */
785 mtspr SPRN_MAS3, r12
786BEGIN_FTR_SECTION
787 srwi r10, r13, 8 /* grab RPN[8:31] */
788 mtspr SPRN_MAS7, r10
789END_FTR_SECTION_IFSET(CPU_FTR_BIG_PHYS)
790#else
7912: rlwimi r11, r12, 0, 20, 31 /* Extract RPN from PTE and merge with perms */
792 mtspr SPRN_MAS3, r11
793#endif
794#ifdef CONFIG_E200
795 /* Round robin TLB1 entries assignment */
796 mfspr r12, SPRN_MAS0
797
798 /* Extract TLB1CFG(NENTRY) */
799 mfspr r11, SPRN_TLB1CFG
800 andi. r11, r11, 0xfff
801
802 /* Extract MAS0(NV) */
803 andi. r13, r12, 0xfff
804 addi r13, r13, 1
805 cmpw 0, r13, r11
806 addi r12, r12, 1
807
808 /* check if we need to wrap */
809 blt 7f
810
811 /* wrap back to first free tlbcam entry */
812 lis r13, tlbcam_index@ha
813 lwz r13, tlbcam_index@l(r13)
814 rlwimi r12, r13, 0, 20, 31
8157:
816 mtspr SPRN_MAS0,r12
817#endif /* CONFIG_E200 */
818
819 tlbwe
820
821 /* Done...restore registers and get out of here. */
822 mfspr r11, SPRN_SPRG7R
823 mtcr r11
824 mfspr r13, SPRN_SPRG5R
825 mfspr r12, SPRN_SPRG4R
826 mfspr r11, SPRN_SPRG1
827 mfspr r10, SPRN_SPRG0
828 rfi /* Force context change */
829
830#ifdef CONFIG_SPE
831/* Note that the SPE support is closely modeled after the AltiVec
832 * support. Changes to one are likely to be applicable to the
833 * other! */
834load_up_spe:
835/*
836 * Disable SPE for the task which had SPE previously,
837 * and save its SPE registers in its thread_struct.
838 * Enables SPE for use in the kernel on return.
839 * On SMP we know the SPE units are free, since we give it up every
840 * switch. -- Kumar
841 */
842 mfmsr r5
843 oris r5,r5,MSR_SPE@h
844 mtmsr r5 /* enable use of SPE now */
845 isync
846/*
847 * For SMP, we don't do lazy SPE switching because it just gets too
848 * horrendously complex, especially when a task switches from one CPU
849 * to another. Instead we call giveup_spe in switch_to.
850 */
851#ifndef CONFIG_SMP
852 lis r3,last_task_used_spe@ha
853 lwz r4,last_task_used_spe@l(r3)
854 cmpi 0,r4,0
855 beq 1f
856 addi r4,r4,THREAD /* want THREAD of last_task_used_spe */
857 SAVE_32EVRS(0,r10,r4)
858 evxor evr10, evr10, evr10 /* clear out evr10 */
859 evmwumiaa evr10, evr10, evr10 /* evr10 <- ACC = 0 * 0 + ACC */
860 li r5,THREAD_ACC
861 evstddx evr10, r4, r5 /* save off accumulator */
862 lwz r5,PT_REGS(r4)
863 lwz r4,_MSR-STACK_FRAME_OVERHEAD(r5)
864 lis r10,MSR_SPE@h
865 andc r4,r4,r10 /* disable SPE for previous task */
866 stw r4,_MSR-STACK_FRAME_OVERHEAD(r5)
8671:
868#endif /* CONFIG_SMP */
869 /* enable use of SPE after return */
870 oris r9,r9,MSR_SPE@h
871 mfspr r5,SPRN_SPRG3 /* current task's THREAD (phys) */
872 li r4,1
873 li r10,THREAD_ACC
874 stw r4,THREAD_USED_SPE(r5)
875 evlddx evr4,r10,r5
876 evmra evr4,evr4
877 REST_32EVRS(0,r10,r5)
878#ifndef CONFIG_SMP
879 subi r4,r5,THREAD
880 stw r4,last_task_used_spe@l(r3)
881#endif /* CONFIG_SMP */
882 /* restore registers and return */
8832: REST_4GPRS(3, r11)
884 lwz r10,_CCR(r11)
885 REST_GPR(1, r11)
886 mtcr r10
887 lwz r10,_LINK(r11)
888 mtlr r10
889 REST_GPR(10, r11)
890 mtspr SPRN_SRR1,r9
891 mtspr SPRN_SRR0,r12
892 REST_GPR(9, r11)
893 REST_GPR(12, r11)
894 lwz r11,GPR11(r11)
895 rfi
896
897/*
898 * SPE unavailable trap from kernel - print a message, but let
899 * the task use SPE in the kernel until it returns to user mode.
900 */
901KernelSPE:
902 lwz r3,_MSR(r1)
903 oris r3,r3,MSR_SPE@h
904 stw r3,_MSR(r1) /* enable use of SPE after return */
905 lis r3,87f@h
906 ori r3,r3,87f@l
907 mr r4,r2 /* current */
908 lwz r5,_NIP(r1)
909 bl printk
910 b ret_from_except
91187: .string "SPE used in kernel (task=%p, pc=%x) \n"
912 .align 4,0
913
914#endif /* CONFIG_SPE */
915
916/*
917 * Global functions
918 */
919
920/*
921 * extern void loadcam_entry(unsigned int index)
922 *
923 * Load TLBCAM[index] entry in to the L2 CAM MMU
924 */
925_GLOBAL(loadcam_entry)
926 lis r4,TLBCAM@ha
927 addi r4,r4,TLBCAM@l
928 mulli r5,r3,20
929 add r3,r5,r4
930 lwz r4,0(r3)
931 mtspr SPRN_MAS0,r4
932 lwz r4,4(r3)
933 mtspr SPRN_MAS1,r4
934 lwz r4,8(r3)
935 mtspr SPRN_MAS2,r4
936 lwz r4,12(r3)
937 mtspr SPRN_MAS3,r4
938 tlbwe
939 isync
940 blr
941
942/*
943 * extern void giveup_altivec(struct task_struct *prev)
944 *
945 * The e500 core does not have an AltiVec unit.
946 */
947_GLOBAL(giveup_altivec)
948 blr
949
950#ifdef CONFIG_SPE
951/*
952 * extern void giveup_spe(struct task_struct *prev)
953 *
954 */
955_GLOBAL(giveup_spe)
956 mfmsr r5
957 oris r5,r5,MSR_SPE@h
958 mtmsr r5 /* enable use of SPE now */
959 isync
960 cmpi 0,r3,0
961 beqlr- /* if no previous owner, done */
962 addi r3,r3,THREAD /* want THREAD of task */
963 lwz r5,PT_REGS(r3)
964 cmpi 0,r5,0
965 SAVE_32EVRS(0, r4, r3)
966 evxor evr6, evr6, evr6 /* clear out evr6 */
967 evmwumiaa evr6, evr6, evr6 /* evr6 <- ACC = 0 * 0 + ACC */
968 li r4,THREAD_ACC
969 evstddx evr6, r4, r3 /* save off accumulator */
970 mfspr r6,SPRN_SPEFSCR
971 stw r6,THREAD_SPEFSCR(r3) /* save spefscr register value */
972 beq 1f
973 lwz r4,_MSR-STACK_FRAME_OVERHEAD(r5)
974 lis r3,MSR_SPE@h
975 andc r4,r4,r3 /* disable SPE for previous task */
976 stw r4,_MSR-STACK_FRAME_OVERHEAD(r5)
9771:
978#ifndef CONFIG_SMP
979 li r5,0
980 lis r4,last_task_used_spe@ha
981 stw r5,last_task_used_spe@l(r4)
982#endif /* CONFIG_SMP */
983 blr
984#endif /* CONFIG_SPE */
985
986/*
987 * extern void giveup_fpu(struct task_struct *prev)
988 *
989 * Not all FSL Book-E cores have an FPU
990 */
991#ifndef CONFIG_PPC_FPU
992_GLOBAL(giveup_fpu)
993 blr
994#endif
995
996/*
997 * extern void abort(void)
998 *
999 * At present, this routine just applies a system reset.
1000 */
1001_GLOBAL(abort)
1002 li r13,0
1003 mtspr SPRN_DBCR0,r13 /* disable all debug events */
1004 isync
1005 mfmsr r13
1006 ori r13,r13,MSR_DE@l /* Enable Debug Events */
1007 mtmsr r13
1008 isync
1009 mfspr r13,SPRN_DBCR0
1010 lis r13,(DBCR0_IDM|DBCR0_RST_CHIP)@h
1011 mtspr SPRN_DBCR0,r13
1012 isync
1013
1014_GLOBAL(set_context)
1015
1016#ifdef CONFIG_BDI_SWITCH
1017 /* Context switch the PTE pointer for the Abatron BDI2000.
1018 * The PGDIR is the second parameter.
1019 */
1020 lis r5, abatron_pteptrs@h
1021 ori r5, r5, abatron_pteptrs@l
1022 stw r4, 0x4(r5)
1023#endif
1024 mtspr SPRN_PID,r3
1025 isync /* Force context change */
1026 blr
1027
1028/*
1029 * We put a few things here that have to be page-aligned. This stuff
1030 * goes at the beginning of the data segment, which is page-aligned.
1031 */
1032 .data
1033 .align 12
1034 .globl sdata
1035sdata:
1036 .globl empty_zero_page
1037empty_zero_page:
1038 .space 4096
1039 .globl swapper_pg_dir
1040swapper_pg_dir:
1041 .space 4096
1042
1043/* Reserved 4k for the critical exception stack & 4k for the machine
1044 * check stack per CPU for kernel mode exceptions */
1045 .section .bss
1046 .align 12
1047exception_stack_bottom:
1048 .space BOOKE_EXCEPTION_STACK_SIZE * NR_CPUS
1049 .globl exception_stack_top
1050exception_stack_top:
1051
1052/*
1053 * This space gets a copy of optional info passed to us by the bootstrap
1054 * which is used to pass parameters into the kernel like root=/dev/sda1, etc.
1055 */
1056 .globl cmd_line
1057cmd_line:
1058 .space 512
1059
1060/*
1061 * Room for two PTE pointers, usually the kernel and current user pointers
1062 * to their respective root page table.
1063 */
1064abatron_pteptrs:
1065 .space 8
diff --git a/arch/ppc/kernel/misc.S b/arch/ppc/kernel/misc.S
index e0c850d85c53..d5e0dfc9ffec 100644
--- a/arch/ppc/kernel/misc.S
+++ b/arch/ppc/kernel/misc.S
@@ -165,24 +165,7 @@ _GLOBAL(_tlbia)
165 ble 1b 165 ble 1b
166 166
167 isync 167 isync
168#elif defined(CONFIG_FSL_BOOKE) 168#else /* !(CONFIG_40x || CONFIG_44x) */
169 /* Invalidate all entries in TLB0 */
170 li r3, 0x04
171 tlbivax 0,3
172 /* Invalidate all entries in TLB1 */
173 li r3, 0x0c
174 tlbivax 0,3
175 /* Invalidate all entries in TLB2 */
176 li r3, 0x14
177 tlbivax 0,3
178 /* Invalidate all entries in TLB3 */
179 li r3, 0x1c
180 tlbivax 0,3
181 msync
182#ifdef CONFIG_SMP
183 tlbsync
184#endif /* CONFIG_SMP */
185#else /* !(CONFIG_40x || CONFIG_44x || CONFIG_FSL_BOOKE) */
186#if defined(CONFIG_SMP) 169#if defined(CONFIG_SMP)
187 rlwinm r8,r1,0,0,18 170 rlwinm r8,r1,0,0,18
188 lwz r8,TI_CPU(r8) 171 lwz r8,TI_CPU(r8)
@@ -268,20 +251,7 @@ _GLOBAL(_tlbie)
268 tlbwe r3, r3, PPC44x_TLB_PAGEID 251 tlbwe r3, r3, PPC44x_TLB_PAGEID
269 isync 252 isync
27010: 25310:
271#elif defined(CONFIG_FSL_BOOKE) 254#else /* !(CONFIG_40x || CONFIG_44x) */
272 rlwinm r4, r3, 0, 0, 19
273 ori r5, r4, 0x08 /* TLBSEL = 1 */
274 ori r6, r4, 0x10 /* TLBSEL = 2 */
275 ori r7, r4, 0x18 /* TLBSEL = 3 */
276 tlbivax 0, r4
277 tlbivax 0, r5
278 tlbivax 0, r6
279 tlbivax 0, r7
280 msync
281#if defined(CONFIG_SMP)
282 tlbsync
283#endif /* CONFIG_SMP */
284#else /* !(CONFIG_40x || CONFIG_44x || CONFIG_FSL_BOOKE) */
285#if defined(CONFIG_SMP) 255#if defined(CONFIG_SMP)
286 rlwinm r8,r1,0,0,18 256 rlwinm r8,r1,0,0,18
287 lwz r8,TI_CPU(r8) 257 lwz r8,TI_CPU(r8)
@@ -338,18 +308,6 @@ _GLOBAL(flush_instruction_cache)
338 lis r3, KERNELBASE@h 308 lis r3, KERNELBASE@h
339 iccci 0,r3 309 iccci 0,r3
340#endif 310#endif
341#elif CONFIG_FSL_BOOKE
342BEGIN_FTR_SECTION
343 mfspr r3,SPRN_L1CSR0
344 ori r3,r3,L1CSR0_CFI|L1CSR0_CLFC
345 /* msync; isync recommended here */
346 mtspr SPRN_L1CSR0,r3
347 isync
348 blr
349END_FTR_SECTION_IFSET(CPU_FTR_UNIFIED_ID_CACHE)
350 mfspr r3,SPRN_L1CSR1
351 ori r3,r3,L1CSR1_ICFI|L1CSR1_ICLFR
352 mtspr SPRN_L1CSR1,r3
353#else 311#else
354 mfspr r3,SPRN_PVR 312 mfspr r3,SPRN_PVR
355 rlwinm r3,r3,16,16,31 313 rlwinm r3,r3,16,16,31
diff --git a/arch/ppc/kernel/ppc_ksyms.c b/arch/ppc/kernel/ppc_ksyms.c
index ba729ce2071c..c35350250cfc 100644
--- a/arch/ppc/kernel/ppc_ksyms.c
+++ b/arch/ppc/kernel/ppc_ksyms.c
@@ -166,12 +166,6 @@ EXPORT_SYMBOL(last_task_used_altivec);
166#endif 166#endif
167EXPORT_SYMBOL(giveup_altivec); 167EXPORT_SYMBOL(giveup_altivec);
168#endif /* CONFIG_ALTIVEC */ 168#endif /* CONFIG_ALTIVEC */
169#ifdef CONFIG_SPE
170#ifndef CONFIG_SMP
171EXPORT_SYMBOL(last_task_used_spe);
172#endif
173EXPORT_SYMBOL(giveup_spe);
174#endif /* CONFIG_SPE */
175#ifdef CONFIG_SMP 169#ifdef CONFIG_SMP
176EXPORT_SYMBOL(smp_call_function); 170EXPORT_SYMBOL(smp_call_function);
177EXPORT_SYMBOL(smp_hw_index); 171EXPORT_SYMBOL(smp_hw_index);
@@ -244,7 +238,7 @@ EXPORT_SYMBOL(debugger_fault_handler);
244EXPORT_SYMBOL(cpm_install_handler); 238EXPORT_SYMBOL(cpm_install_handler);
245EXPORT_SYMBOL(cpm_free_handler); 239EXPORT_SYMBOL(cpm_free_handler);
246#endif /* CONFIG_8xx */ 240#endif /* CONFIG_8xx */
247#if defined(CONFIG_8xx) || defined(CONFIG_40x) || defined(CONFIG_85xx) 241#if defined(CONFIG_8xx) || defined(CONFIG_40x)
248EXPORT_SYMBOL(__res); 242EXPORT_SYMBOL(__res);
249#endif 243#endif
250 244
diff --git a/arch/ppc/kernel/setup.c b/arch/ppc/kernel/setup.c
index 5888ae6a4ac8..d51368d72e39 100644
--- a/arch/ppc/kernel/setup.c
+++ b/arch/ppc/kernel/setup.c
@@ -38,8 +38,7 @@
38#include <asm/xmon.h> 38#include <asm/xmon.h>
39#include <asm/ocp.h> 39#include <asm/ocp.h>
40 40
41#define USES_PPC_SYS (defined(CONFIG_85xx) || \ 41#define USES_PPC_SYS (defined(CONFIG_MPC10X_BRIDGE) || defined(CONFIG_8260) || \
42 defined(CONFIG_MPC10X_BRIDGE) || defined(CONFIG_8260) || \
43 defined(CONFIG_PPC_MPC52xx)) 42 defined(CONFIG_PPC_MPC52xx))
44 43
45#if USES_PPC_SYS 44#if USES_PPC_SYS
diff --git a/arch/ppc/kernel/traps.c b/arch/ppc/kernel/traps.c
index 25a1085fbd01..a467a429c2fe 100644
--- a/arch/ppc/kernel/traps.c
+++ b/arch/ppc/kernel/traps.c
@@ -194,11 +194,7 @@ static inline int check_io_access(struct pt_regs *regs)
194/* On 4xx, the reason for the machine check or program exception 194/* On 4xx, the reason for the machine check or program exception
195 is in the ESR. */ 195 is in the ESR. */
196#define get_reason(regs) ((regs)->dsisr) 196#define get_reason(regs) ((regs)->dsisr)
197#ifndef CONFIG_FSL_BOOKE
198#define get_mc_reason(regs) ((regs)->dsisr) 197#define get_mc_reason(regs) ((regs)->dsisr)
199#else
200#define get_mc_reason(regs) (mfspr(SPRN_MCSR))
201#endif
202#define REASON_FP ESR_FP 198#define REASON_FP ESR_FP
203#define REASON_ILLEGAL (ESR_PIL | ESR_PUO) 199#define REASON_ILLEGAL (ESR_PIL | ESR_PUO)
204#define REASON_PRIVILEGED ESR_PPR 200#define REASON_PRIVILEGED ESR_PPR
@@ -281,66 +277,6 @@ int machine_check_440A(struct pt_regs *regs)
281 } 277 }
282 return 0; 278 return 0;
283} 279}
284#elif defined(CONFIG_E500)
285int machine_check_e500(struct pt_regs *regs)
286{
287 unsigned long reason = get_mc_reason(regs);
288
289 printk("Machine check in kernel mode.\n");
290 printk("Caused by (from MCSR=%lx): ", reason);
291
292 if (reason & MCSR_MCP)
293 printk("Machine Check Signal\n");
294 if (reason & MCSR_ICPERR)
295 printk("Instruction Cache Parity Error\n");
296 if (reason & MCSR_DCP_PERR)
297 printk("Data Cache Push Parity Error\n");
298 if (reason & MCSR_DCPERR)
299 printk("Data Cache Parity Error\n");
300 if (reason & MCSR_BUS_IAERR)
301 printk("Bus - Instruction Address Error\n");
302 if (reason & MCSR_BUS_RAERR)
303 printk("Bus - Read Address Error\n");
304 if (reason & MCSR_BUS_WAERR)
305 printk("Bus - Write Address Error\n");
306 if (reason & MCSR_BUS_IBERR)
307 printk("Bus - Instruction Data Error\n");
308 if (reason & MCSR_BUS_RBERR)
309 printk("Bus - Read Data Bus Error\n");
310 if (reason & MCSR_BUS_WBERR)
311 printk("Bus - Read Data Bus Error\n");
312 if (reason & MCSR_BUS_IPERR)
313 printk("Bus - Instruction Parity Error\n");
314 if (reason & MCSR_BUS_RPERR)
315 printk("Bus - Read Parity Error\n");
316
317 return 0;
318}
319#elif defined(CONFIG_E200)
320int machine_check_e200(struct pt_regs *regs)
321{
322 unsigned long reason = get_mc_reason(regs);
323
324 printk("Machine check in kernel mode.\n");
325 printk("Caused by (from MCSR=%lx): ", reason);
326
327 if (reason & MCSR_MCP)
328 printk("Machine Check Signal\n");
329 if (reason & MCSR_CP_PERR)
330 printk("Cache Push Parity Error\n");
331 if (reason & MCSR_CPERR)
332 printk("Cache Parity Error\n");
333 if (reason & MCSR_EXCP_ERR)
334 printk("ISI, ITLB, or Bus Error on first instruction fetch for an exception handler\n");
335 if (reason & MCSR_BUS_IRERR)
336 printk("Bus - Read Bus Error on instruction fetch\n");
337 if (reason & MCSR_BUS_DRERR)
338 printk("Bus - Read Bus Error on data load\n");
339 if (reason & MCSR_BUS_WRERR)
340 printk("Bus - Write Bus Error on buffered store or cache line push\n");
341
342 return 0;
343}
344#else 280#else
345int machine_check_generic(struct pt_regs *regs) 281int machine_check_generic(struct pt_regs *regs)
346{ 282{
@@ -866,63 +802,6 @@ void altivec_assist_exception(struct pt_regs *regs)
866} 802}
867#endif /* CONFIG_ALTIVEC */ 803#endif /* CONFIG_ALTIVEC */
868 804
869#ifdef CONFIG_E500
870void performance_monitor_exception(struct pt_regs *regs)
871{
872 perf_irq(regs);
873}
874#endif
875
876#ifdef CONFIG_FSL_BOOKE
877void CacheLockingException(struct pt_regs *regs, unsigned long address,
878 unsigned long error_code)
879{
880 /* We treat cache locking instructions from the user
881 * as priv ops, in the future we could try to do
882 * something smarter
883 */
884 if (error_code & (ESR_DLK|ESR_ILK))
885 _exception(SIGILL, regs, ILL_PRVOPC, regs->nip);
886 return;
887}
888#endif /* CONFIG_FSL_BOOKE */
889
890#ifdef CONFIG_SPE
891void SPEFloatingPointException(struct pt_regs *regs)
892{
893 unsigned long spefscr;
894 int fpexc_mode;
895 int code = 0;
896
897 spefscr = current->thread.spefscr;
898 fpexc_mode = current->thread.fpexc_mode;
899
900 /* Hardware does not necessarily set sticky
901 * underflow/overflow/invalid flags */
902 if ((spefscr & SPEFSCR_FOVF) && (fpexc_mode & PR_FP_EXC_OVF)) {
903 code = FPE_FLTOVF;
904 spefscr |= SPEFSCR_FOVFS;
905 }
906 else if ((spefscr & SPEFSCR_FUNF) && (fpexc_mode & PR_FP_EXC_UND)) {
907 code = FPE_FLTUND;
908 spefscr |= SPEFSCR_FUNFS;
909 }
910 else if ((spefscr & SPEFSCR_FDBZ) && (fpexc_mode & PR_FP_EXC_DIV))
911 code = FPE_FLTDIV;
912 else if ((spefscr & SPEFSCR_FINV) && (fpexc_mode & PR_FP_EXC_INV)) {
913 code = FPE_FLTINV;
914 spefscr |= SPEFSCR_FINVS;
915 }
916 else if ((spefscr & (SPEFSCR_FG | SPEFSCR_FX)) && (fpexc_mode & PR_FP_EXC_RES))
917 code = FPE_FLTRES;
918
919 current->thread.spefscr = spefscr;
920
921 _exception(SIGFPE, regs, code, regs->nip);
922 return;
923}
924#endif
925
926#ifdef CONFIG_BOOKE_WDT 805#ifdef CONFIG_BOOKE_WDT
927/* 806/*
928 * Default handler for a Watchdog exception, 807 * Default handler for a Watchdog exception,
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-25 19:03:24 -0500