projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
sparc32: Make mmu_map_dma_area and mmu_unmap_dma_area take a device pointer.
[linux-2.6-block.git] / arch / sparc / mm / sun4c.c
CommitLineData
64d329ee 1/* sun4c.c: Doing in software what should be done in hardware.
1da177e4 2 *
64d329ee 3 * Copyright (C) 1996 David S. Miller (davem@davemloft.net)
1da177e4
LT		 4 * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be)
5 * Copyright (C) 1996 Andrew Tridgell (Andrew.Tridgell@anu.edu.au)
6 * Copyright (C) 1997-2000 Anton Blanchard (anton@samba.org)
7 * Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
8 */
9
10#define NR_TASK_BUCKETS 512
11
1da177e4
LT		 12#include <linux/kernel.h>
13#include <linux/mm.h>
14#include <linux/init.h>
15#include <linux/bootmem.h>
16#include <linux/highmem.h>
17#include <linux/fs.h>
18#include <linux/seq_file.h>
0912a5db 19#include <linux/scatterlist.h>
1da177e4 20
1da177e4
LT		 21#include <asm/page.h>
22#include <asm/pgalloc.h>
23#include <asm/pgtable.h>
24#include <asm/vaddrs.h>
25#include <asm/idprom.h>
26#include <asm/machines.h>
27#include <asm/memreg.h>
28#include <asm/processor.h>
29#include <asm/auxio.h>
30#include <asm/io.h>
31#include <asm/oplib.h>
32#include <asm/openprom.h>
33#include <asm/mmu_context.h>
34#include <asm/sun4paddr.h>
35#include <asm/highmem.h>
36#include <asm/btfixup.h>
37#include <asm/cacheflush.h>
38#include <asm/tlbflush.h>
39
40/* Because of our dynamic kernel TLB miss strategy, and how
41 * our DVMA mapping allocation works, you _MUST_:
42 *
43 * 1) Disable interrupts _and_ not touch any dynamic kernel
44 * memory while messing with kernel MMU state. By
45 * dynamic memory I mean any object which is not in
46 * the kernel image itself or a thread_union (both of
47 * which are locked into the MMU).
48 * 2) Disable interrupts while messing with user MMU state.
49 */
50
51extern int num_segmaps, num_contexts;
52
53extern unsigned long page_kernel;
54
55#ifdef CONFIG_SUN4
56#define SUN4C_VAC_SIZE sun4c_vacinfo.num_bytes
57#else
58/* That's it, we prom_halt() on sun4c if the cache size is something other than 65536.
59 * So let's save some cycles and just use that everywhere except for that bootup
60 * sanity check.
61 */
62#define SUN4C_VAC_SIZE 65536
63#endif
64
65#define SUN4C_KERNEL_BUCKETS 32
66
67/* Flushing the cache. */
68struct sun4c_vac_props sun4c_vacinfo;
69unsigned long sun4c_kernel_faults;
70
71/* Invalidate every sun4c cache line tag. */
72static void __init sun4c_flush_all(void)
73{
74 unsigned long begin, end;
75
76 if (sun4c_vacinfo.on)
77 panic("SUN4C: AIEEE, trying to invalidate vac while it is on.");
78
79 /* Clear 'valid' bit in all cache line tags */
80 begin = AC_CACHETAGS;
81 end = (AC_CACHETAGS + SUN4C_VAC_SIZE);
82 while (begin < end) {
83 __asm__ __volatile__("sta %%g0, [%0] %1\n\t" : :
84 "r" (begin), "i" (ASI_CONTROL));
85 begin += sun4c_vacinfo.linesize;
86 }
87}
88
89static void sun4c_flush_context_hw(void)
90{
91 unsigned long end = SUN4C_VAC_SIZE;
92
93 __asm__ __volatile__(
94 "1: addcc %0, -4096, %0\n\t"
95 " bne 1b\n\t"
96 " sta %%g0, [%0] %2"
97 : "=&r" (end)
98 : "0" (end), "i" (ASI_HWFLUSHCONTEXT)
99 : "cc");
100}
101
102/* Must be called minimally with IRQs disabled. */
103static void sun4c_flush_segment_hw(unsigned long addr)
104{
105 if (sun4c_get_segmap(addr) != invalid_segment) {
106 unsigned long vac_size = SUN4C_VAC_SIZE;
107
108 __asm__ __volatile__(
109 "1: addcc %0, -4096, %0\n\t"
110 " bne 1b\n\t"
111 " sta %%g0, [%2 + %0] %3"
112 : "=&r" (vac_size)
113 : "0" (vac_size), "r" (addr), "i" (ASI_HWFLUSHSEG)
114 : "cc");
115 }
116}
117
118/* File local boot time fixups. */
119BTFIXUPDEF_CALL(void, sun4c_flush_page, unsigned long)
120BTFIXUPDEF_CALL(void, sun4c_flush_segment, unsigned long)
121BTFIXUPDEF_CALL(void, sun4c_flush_context, void)
122
123#define sun4c_flush_page(addr) BTFIXUP_CALL(sun4c_flush_page)(addr)
124#define sun4c_flush_segment(addr) BTFIXUP_CALL(sun4c_flush_segment)(addr)
125#define sun4c_flush_context() BTFIXUP_CALL(sun4c_flush_context)()
126
127/* Must be called minimally with interrupts disabled. */
128static void sun4c_flush_page_hw(unsigned long addr)
129{
130 addr &= PAGE_MASK;
131 if ((int)sun4c_get_pte(addr) < 0)
132 __asm__ __volatile__("sta %%g0, [%0] %1"
133 : : "r" (addr), "i" (ASI_HWFLUSHPAGE));
134}
135
136/* Don't inline the software version as it eats too many cache lines if expanded. */
137static void sun4c_flush_context_sw(void)
138{
139 unsigned long nbytes = SUN4C_VAC_SIZE;
140 unsigned long lsize = sun4c_vacinfo.linesize;
141
142 __asm__ __volatile__(
143 "add %2, %2, %%g1\n\t"
144 "add %2, %%g1, %%g2\n\t"
145 "add %2, %%g2, %%g3\n\t"
146 "add %2, %%g3, %%g4\n\t"
147 "add %2, %%g4, %%g5\n\t"
148 "add %2, %%g5, %%o4\n\t"
149 "add %2, %%o4, %%o5\n"
150 "1:\n\t"
151 "subcc %0, %%o5, %0\n\t"
152 "sta %%g0, [%0] %3\n\t"
153 "sta %%g0, [%0 + %2] %3\n\t"
154 "sta %%g0, [%0 + %%g1] %3\n\t"
155 "sta %%g0, [%0 + %%g2] %3\n\t"
156 "sta %%g0, [%0 + %%g3] %3\n\t"
157 "sta %%g0, [%0 + %%g4] %3\n\t"
158 "sta %%g0, [%0 + %%g5] %3\n\t"
159 "bg 1b\n\t"
160 " sta %%g0, [%1 + %%o4] %3\n"
161 : "=&r" (nbytes)
162 : "0" (nbytes), "r" (lsize), "i" (ASI_FLUSHCTX)
163 : "g1", "g2", "g3", "g4", "g5", "o4", "o5", "cc");
164}
165
166/* Don't inline the software version as it eats too many cache lines if expanded. */
167static void sun4c_flush_segment_sw(unsigned long addr)
168{
169 if (sun4c_get_segmap(addr) != invalid_segment) {
170 unsigned long nbytes = SUN4C_VAC_SIZE;
171 unsigned long lsize = sun4c_vacinfo.linesize;
172
173 __asm__ __volatile__(
174 "add %2, %2, %%g1\n\t"
175 "add %2, %%g1, %%g2\n\t"
176 "add %2, %%g2, %%g3\n\t"
177 "add %2, %%g3, %%g4\n\t"
178 "add %2, %%g4, %%g5\n\t"
179 "add %2, %%g5, %%o4\n\t"
180 "add %2, %%o4, %%o5\n"
181 "1:\n\t"
182 "subcc %1, %%o5, %1\n\t"
183 "sta %%g0, [%0] %6\n\t"
184 "sta %%g0, [%0 + %2] %6\n\t"
185 "sta %%g0, [%0 + %%g1] %6\n\t"
186 "sta %%g0, [%0 + %%g2] %6\n\t"
187 "sta %%g0, [%0 + %%g3] %6\n\t"
188 "sta %%g0, [%0 + %%g4] %6\n\t"
189 "sta %%g0, [%0 + %%g5] %6\n\t"
190 "sta %%g0, [%0 + %%o4] %6\n\t"
191 "bg 1b\n\t"
192 " add %0, %%o5, %0\n"
193 : "=&r" (addr), "=&r" (nbytes), "=&r" (lsize)
194 : "0" (addr), "1" (nbytes), "2" (lsize),
195 "i" (ASI_FLUSHSEG)
196 : "g1", "g2", "g3", "g4", "g5", "o4", "o5", "cc");
197 }
198}
199
200/* Don't inline the software version as it eats too many cache lines if expanded. */
201static void sun4c_flush_page_sw(unsigned long addr)
202{
203 addr &= PAGE_MASK;
204 if ((sun4c_get_pte(addr) & (_SUN4C_PAGE_NOCACHE | _SUN4C_PAGE_VALID)) ==
205 _SUN4C_PAGE_VALID) {
206 unsigned long left = PAGE_SIZE;
207 unsigned long lsize = sun4c_vacinfo.linesize;
208
209 __asm__ __volatile__(
210 "add %2, %2, %%g1\n\t"
211 "add %2, %%g1, %%g2\n\t"
212 "add %2, %%g2, %%g3\n\t"
213 "add %2, %%g3, %%g4\n\t"
214 "add %2, %%g4, %%g5\n\t"
215 "add %2, %%g5, %%o4\n\t"
216 "add %2, %%o4, %%o5\n"
217 "1:\n\t"
218 "subcc %1, %%o5, %1\n\t"
219 "sta %%g0, [%0] %6\n\t"
220 "sta %%g0, [%0 + %2] %6\n\t"
221 "sta %%g0, [%0 + %%g1] %6\n\t"
222 "sta %%g0, [%0 + %%g2] %6\n\t"
223 "sta %%g0, [%0 + %%g3] %6\n\t"
224 "sta %%g0, [%0 + %%g4] %6\n\t"
225 "sta %%g0, [%0 + %%g5] %6\n\t"
226 "sta %%g0, [%0 + %%o4] %6\n\t"
227 "bg 1b\n\t"
228 " add %0, %%o5, %0\n"
229 : "=&r" (addr), "=&r" (left), "=&r" (lsize)
230 : "0" (addr), "1" (left), "2" (lsize),
231 "i" (ASI_FLUSHPG)
232 : "g1", "g2", "g3", "g4", "g5", "o4", "o5", "cc");
233 }
234}
235
236/* The sun4c's do have an on chip store buffer. And the way you
237 * clear them out isn't so obvious. The only way I can think of
238 * to accomplish this is to read the current context register,
239 * store the same value there, then read an external hardware
240 * register.
241 */
242void sun4c_complete_all_stores(void)
243{
244 volatile int _unused;
245
246 _unused = sun4c_get_context();
247 sun4c_set_context(_unused);
248#ifdef CONFIG_SUN_AUXIO
249 _unused = get_auxio();
250#endif
251}
252
253/* Bootup utility functions. */
254static inline void sun4c_init_clean_segmap(unsigned char pseg)
255{
256 unsigned long vaddr;
257
258 sun4c_put_segmap(0, pseg);
259 for (vaddr = 0; vaddr < SUN4C_REAL_PGDIR_SIZE; vaddr += PAGE_SIZE)
260 sun4c_put_pte(vaddr, 0);
261 sun4c_put_segmap(0, invalid_segment);
262}
263
264static inline void sun4c_init_clean_mmu(unsigned long kernel_end)
265{
266 unsigned long vaddr;
267 unsigned char savectx, ctx;
268
269 savectx = sun4c_get_context();
1da177e4
LT		 270 for (ctx = 0; ctx < num_contexts; ctx++) {
271 sun4c_set_context(ctx);
272 for (vaddr = 0; vaddr < 0x20000000; vaddr += SUN4C_REAL_PGDIR_SIZE)
273 sun4c_put_segmap(vaddr, invalid_segment);
274 for (vaddr = 0xe0000000; vaddr < KERNBASE; vaddr += SUN4C_REAL_PGDIR_SIZE)
275 sun4c_put_segmap(vaddr, invalid_segment);
276 for (vaddr = kernel_end; vaddr < KADB_DEBUGGER_BEGVM; vaddr += SUN4C_REAL_PGDIR_SIZE)
277 sun4c_put_segmap(vaddr, invalid_segment);
278 for (vaddr = LINUX_OPPROM_ENDVM; vaddr; vaddr += SUN4C_REAL_PGDIR_SIZE)
279 sun4c_put_segmap(vaddr, invalid_segment);
280 }
281 sun4c_set_context(savectx);
282}
283
284void __init sun4c_probe_vac(void)
285{
286 sun4c_disable_vac();
287
288 if (ARCH_SUN4) {
289 switch (idprom->id_machtype) {
290
291 case (SM_SUN4|SM_4_110):
292 sun4c_vacinfo.type = VAC_NONE;
293 sun4c_vacinfo.num_bytes = 0;
294 sun4c_vacinfo.linesize = 0;
295 sun4c_vacinfo.do_hwflushes = 0;
296 prom_printf("No VAC. Get some bucks and buy a real computer.");
297 prom_halt();
298 break;
299
300 case (SM_SUN4|SM_4_260):
301 sun4c_vacinfo.type = VAC_WRITE_BACK;
302 sun4c_vacinfo.num_bytes = 128 * 1024;
303 sun4c_vacinfo.linesize = 16;
304 sun4c_vacinfo.do_hwflushes = 0;
305 break;
306
307 case (SM_SUN4|SM_4_330):
308 sun4c_vacinfo.type = VAC_WRITE_THROUGH;
309 sun4c_vacinfo.num_bytes = 128 * 1024;
310 sun4c_vacinfo.linesize = 16;
311 sun4c_vacinfo.do_hwflushes = 0;
312 break;
313
314 case (SM_SUN4|SM_4_470):
315 sun4c_vacinfo.type = VAC_WRITE_BACK;
316 sun4c_vacinfo.num_bytes = 128 * 1024;
317 sun4c_vacinfo.linesize = 32;
318 sun4c_vacinfo.do_hwflushes = 0;
319 break;
320
321 default:
322 prom_printf("Cannot initialize VAC - weird sun4 model idprom->id_machtype = %d", idprom->id_machtype);
323 prom_halt();
324 };
325 } else {
326 sun4c_vacinfo.type = VAC_WRITE_THROUGH;
327
328 if ((idprom->id_machtype == (SM_SUN4C | SM_4C_SS1)) ||
329 (idprom->id_machtype == (SM_SUN4C | SM_4C_SS1PLUS))) {
330 /* PROM on SS1 lacks this info, to be super safe we
331 * hard code it here since this arch is cast in stone.
332 */
333 sun4c_vacinfo.num_bytes = 65536;
334 sun4c_vacinfo.linesize = 16;
335 } else {
336 sun4c_vacinfo.num_bytes =
337 prom_getintdefault(prom_root_node, "vac-size", 65536);
338 sun4c_vacinfo.linesize =
339 prom_getintdefault(prom_root_node, "vac-linesize", 16);
340 }
341 sun4c_vacinfo.do_hwflushes =
342 prom_getintdefault(prom_root_node, "vac-hwflush", 0);
343
344 if (sun4c_vacinfo.do_hwflushes == 0)
345 sun4c_vacinfo.do_hwflushes =
346 prom_getintdefault(prom_root_node, "vac_hwflush", 0);
347
348 if (sun4c_vacinfo.num_bytes != 65536) {
349 prom_printf("WEIRD Sun4C VAC cache size, "
350 "tell sparclinux@vger.kernel.org");
351 prom_halt();
352 }
353 }
354
355 sun4c_vacinfo.num_lines =
356 (sun4c_vacinfo.num_bytes / sun4c_vacinfo.linesize);
357 switch (sun4c_vacinfo.linesize) {
358 case 16:
359 sun4c_vacinfo.log2lsize = 4;
360 break;
361 case 32:
362 sun4c_vacinfo.log2lsize = 5;
363 break;
364 default:
365 prom_printf("probe_vac: Didn't expect vac-linesize of %d, halting\n",
366 sun4c_vacinfo.linesize);
367 prom_halt();
368 };
369
370 sun4c_flush_all();
371 sun4c_enable_vac();
372}
373
374/* Patch instructions for the low level kernel fault handler. */
375extern unsigned long invalid_segment_patch1, invalid_segment_patch1_ff;
376extern unsigned long invalid_segment_patch2, invalid_segment_patch2_ff;
377extern unsigned long invalid_segment_patch1_1ff, invalid_segment_patch2_1ff;
378extern unsigned long num_context_patch1, num_context_patch1_16;
379extern unsigned long num_context_patch2_16;
380extern unsigned long vac_linesize_patch, vac_linesize_patch_32;
381extern unsigned long vac_hwflush_patch1, vac_hwflush_patch1_on;
382extern unsigned long vac_hwflush_patch2, vac_hwflush_patch2_on;
383
384#define PATCH_INSN(src, dst) do { \
385 daddr = &(dst); \
386 iaddr = &(src); \
387 *daddr = *iaddr; \
388 } while (0)
389
390static void __init patch_kernel_fault_handler(void)
391{
392 unsigned long *iaddr, *daddr;
393
394 switch (num_segmaps) {
395 case 128:
396 /* Default, nothing to do. */
397 break;
398 case 256:
399 PATCH_INSN(invalid_segment_patch1_ff,
400 invalid_segment_patch1);
401 PATCH_INSN(invalid_segment_patch2_ff,
402 invalid_segment_patch2);
403 break;
404 case 512:
405 PATCH_INSN(invalid_segment_patch1_1ff,
406 invalid_segment_patch1);
407 PATCH_INSN(invalid_segment_patch2_1ff,
408 invalid_segment_patch2);
409 break;
410 default:
411 prom_printf("Unhandled number of segmaps: %d\n",
412 num_segmaps);
413 prom_halt();
414 };
415 switch (num_contexts) {
416 case 8:
417 /* Default, nothing to do. */
418 break;
419 case 16:
420 PATCH_INSN(num_context_patch1_16,
421 num_context_patch1);
422 break;
423 default:
424 prom_printf("Unhandled number of contexts: %d\n",
425 num_contexts);
426 prom_halt();
427 };
428
429 if (sun4c_vacinfo.do_hwflushes != 0) {
430 PATCH_INSN(vac_hwflush_patch1_on, vac_hwflush_patch1);
431 PATCH_INSN(vac_hwflush_patch2_on, vac_hwflush_patch2);
432 } else {
433 switch (sun4c_vacinfo.linesize) {
434 case 16:
435 /* Default, nothing to do. */
436 break;
437 case 32:
438 PATCH_INSN(vac_linesize_patch_32, vac_linesize_patch);
439 break;
440 default:
441 prom_printf("Impossible VAC linesize %d, halting...\n",
442 sun4c_vacinfo.linesize);
443 prom_halt();
444 };
445 }
446}
447
448static void __init sun4c_probe_mmu(void)
449{
450 if (ARCH_SUN4) {
451 switch (idprom->id_machtype) {
452 case (SM_SUN4|SM_4_110):
453 prom_printf("No support for 4100 yet\n");
454 prom_halt();
455 num_segmaps = 256;
456 num_contexts = 8;
457 break;
458
459 case (SM_SUN4|SM_4_260):
460 /* should be 512 segmaps. when it get fixed */
461 num_segmaps = 256;
462 num_contexts = 16;
463 break;
464
465 case (SM_SUN4|SM_4_330):
466 num_segmaps = 256;
467 num_contexts = 16;
468 break;
469
470 case (SM_SUN4|SM_4_470):
471 /* should be 1024 segmaps. when it get fixed */
472 num_segmaps = 256;
473 num_contexts = 64;
474 break;
475 default:
476 prom_printf("Invalid SUN4 model\n");
477 prom_halt();
478 };
479 } else {
480 if ((idprom->id_machtype == (SM_SUN4C | SM_4C_SS1)) ||
481 (idprom->id_machtype == (SM_SUN4C | SM_4C_SS1PLUS))) {
482 /* Hardcode these just to be safe, PROM on SS1 does
483 * not have this info available in the root node.
484 */
485 num_segmaps = 128;
486 num_contexts = 8;
487 } else {
488 num_segmaps =
489 prom_getintdefault(prom_root_node, "mmu-npmg", 128);
490 num_contexts =
491 prom_getintdefault(prom_root_node, "mmu-nctx", 0x8);
492 }
493 }
494 patch_kernel_fault_handler();
495}
496
a3297296 497volatile unsigned long __iomem *sun4c_memerr_reg = NULL;
1da177e4
LT		 498
499void __init sun4c_probe_memerr_reg(void)
500{
501 int node;
502 struct linux_prom_registers regs[1];
503
504 if (ARCH_SUN4) {
505 sun4c_memerr_reg = ioremap(sun4_memreg_physaddr, PAGE_SIZE);
506 } else {
507 node = prom_getchild(prom_root_node);
508 node = prom_searchsiblings(prom_root_node, "memory-error");
509 if (!node)
510 return;
511 if (prom_getproperty(node, "reg", (char *)regs, sizeof(regs)) <= 0)
512 return;
513 /* hmm I think regs[0].which_io is zero here anyways */
514 sun4c_memerr_reg = ioremap(regs[0].phys_addr, regs[0].reg_size);
515 }
516}
517
518static inline void sun4c_init_ss2_cache_bug(void)
519{
520 extern unsigned long start;
521
522 if ((idprom->id_machtype == (SM_SUN4C | SM_4C_SS2)) ||
523 (idprom->id_machtype == (SM_SUN4C | SM_4C_IPX)) ||
524 (idprom->id_machtype == (SM_SUN4 | SM_4_330)) ||
525 (idprom->id_machtype == (SM_SUN4C | SM_4C_ELC))) {
526 /* Whee.. */
527 printk("SS2 cache bug detected, uncaching trap table page\n");
528 sun4c_flush_page((unsigned int) &start);
529 sun4c_put_pte(((unsigned long) &start),
530 (sun4c_get_pte((unsigned long) &start) | _SUN4C_PAGE_NOCACHE));
531 }
532}
533
534/* Addr is always aligned on a page boundary for us already. */
4b1c5df2
DM		 535static int sun4c_map_dma_area(struct device *dev, dma_addr_t *pba, unsigned long va,
536 unsigned long addr, int len)
1da177e4
LT		 537{
538 unsigned long page, end;
539
540 *pba = addr;
541
542 end = PAGE_ALIGN((addr + len));
543 while (addr < end) {
544 page = va;
545 sun4c_flush_page(page);
546 page -= PAGE_OFFSET;
547 page >>= PAGE_SHIFT;
548 page |= (_SUN4C_PAGE_VALID | _SUN4C_PAGE_DIRTY |
549 _SUN4C_PAGE_NOCACHE | _SUN4C_PAGE_PRIV);
550 sun4c_put_pte(addr, page);
551 addr += PAGE_SIZE;
552 va += PAGE_SIZE;
553 }
554
555 return 0;
556}
557
4b1c5df2 558static void sun4c_unmap_dma_area(struct device *dev, unsigned long busa, int len)
1da177e4
LT		 559{
560 /* Fortunately for us, bus_addr == uncached_virt in sun4c. */
561 /* XXX Implement this */
562}
563
564/* TLB management. */
565
566/* Don't change this struct without changing entry.S. This is used
567 * in the in-window kernel fault handler, and you don't want to mess
568 * with that. (See sun4c_fault in entry.S).
569 */
570struct sun4c_mmu_entry {
571 struct sun4c_mmu_entry *next;
572 struct sun4c_mmu_entry *prev;
573 unsigned long vaddr;
574 unsigned char pseg;
575 unsigned char locked;
576
577 /* For user mappings only, and completely hidden from kernel
578 * TLB miss code.
579 */
580 unsigned char ctx;
581 struct sun4c_mmu_entry *lru_next;
582 struct sun4c_mmu_entry *lru_prev;
583};
584
585static struct sun4c_mmu_entry mmu_entry_pool[SUN4C_MAX_SEGMAPS];
586
587static void __init sun4c_init_mmu_entry_pool(void)
588{
589 int i;
590
591 for (i=0; i < SUN4C_MAX_SEGMAPS; i++) {
592 mmu_entry_pool[i].pseg = i;
593 mmu_entry_pool[i].next = NULL;
594 mmu_entry_pool[i].prev = NULL;
595 mmu_entry_pool[i].vaddr = 0;
596 mmu_entry_pool[i].locked = 0;
597 mmu_entry_pool[i].ctx = 0;
598 mmu_entry_pool[i].lru_next = NULL;
599 mmu_entry_pool[i].lru_prev = NULL;
600 }
601 mmu_entry_pool[invalid_segment].locked = 1;
602}
603
604static inline void fix_permissions(unsigned long vaddr, unsigned long bits_on,
605 unsigned long bits_off)
606{
607 unsigned long start, end;
608
609 end = vaddr + SUN4C_REAL_PGDIR_SIZE;
610 for (start = vaddr; start < end; start += PAGE_SIZE)
611 if (sun4c_get_pte(start) & _SUN4C_PAGE_VALID)
612 sun4c_put_pte(start, (sun4c_get_pte(start) | bits_on) &
613 ~bits_off);
614}
615
616static inline void sun4c_init_map_kernelprom(unsigned long kernel_end)
617{
618 unsigned long vaddr;
619 unsigned char pseg, ctx;
620#ifdef CONFIG_SUN4
621 /* sun4/110 and 260 have no kadb. */
622 if ((idprom->id_machtype != (SM_SUN4 | SM_4_260)) &&
623 (idprom->id_machtype != (SM_SUN4 | SM_4_110))) {
624#endif
625 for (vaddr = KADB_DEBUGGER_BEGVM;
626 vaddr < LINUX_OPPROM_ENDVM;
627 vaddr += SUN4C_REAL_PGDIR_SIZE) {
628 pseg = sun4c_get_segmap(vaddr);
629 if (pseg != invalid_segment) {
630 mmu_entry_pool[pseg].locked = 1;
631 for (ctx = 0; ctx < num_contexts; ctx++)
632 prom_putsegment(ctx, vaddr, pseg);
633 fix_permissions(vaddr, _SUN4C_PAGE_PRIV, 0);
634 }
635 }
636#ifdef CONFIG_SUN4
637 }
638#endif
639 for (vaddr = KERNBASE; vaddr < kernel_end; vaddr += SUN4C_REAL_PGDIR_SIZE) {
640 pseg = sun4c_get_segmap(vaddr);
641 mmu_entry_pool[pseg].locked = 1;
642 for (ctx = 0; ctx < num_contexts; ctx++)
643 prom_putsegment(ctx, vaddr, pseg);
644 fix_permissions(vaddr, _SUN4C_PAGE_PRIV, _SUN4C_PAGE_NOCACHE);
645 }
646}
647
648static void __init sun4c_init_lock_area(unsigned long start, unsigned long end)
649{
650 int i, ctx;
651
652 while (start < end) {
653 for (i = 0; i < invalid_segment; i++)
654 if (!mmu_entry_pool[i].locked)
655 break;
656 mmu_entry_pool[i].locked = 1;
657 sun4c_init_clean_segmap(i);
658 for (ctx = 0; ctx < num_contexts; ctx++)
659 prom_putsegment(ctx, start, mmu_entry_pool[i].pseg);
660 start += SUN4C_REAL_PGDIR_SIZE;
661 }
662}
663
664/* Don't change this struct without changing entry.S. This is used
665 * in the in-window kernel fault handler, and you don't want to mess
666 * with that. (See sun4c_fault in entry.S).
667 */
668struct sun4c_mmu_ring {
669 struct sun4c_mmu_entry ringhd;
670 int num_entries;
671};
672
673static struct sun4c_mmu_ring sun4c_context_ring[SUN4C_MAX_CONTEXTS]; /* used user entries */
674static struct sun4c_mmu_ring sun4c_ufree_ring; /* free user entries */
675static struct sun4c_mmu_ring sun4c_ulru_ring; /* LRU user entries */
676struct sun4c_mmu_ring sun4c_kernel_ring; /* used kernel entries */
677struct sun4c_mmu_ring sun4c_kfree_ring; /* free kernel entries */
678
679static inline void sun4c_init_rings(void)
680{
681 int i;
682
683 for (i = 0; i < SUN4C_MAX_CONTEXTS; i++) {
684 sun4c_context_ring[i].ringhd.next =
685 sun4c_context_ring[i].ringhd.prev =
686 &sun4c_context_ring[i].ringhd;
687 sun4c_context_ring[i].num_entries = 0;
688 }
689 sun4c_ufree_ring.ringhd.next = sun4c_ufree_ring.ringhd.prev =
690 &sun4c_ufree_ring.ringhd;
691 sun4c_ufree_ring.num_entries = 0;
692 sun4c_ulru_ring.ringhd.lru_next = sun4c_ulru_ring.ringhd.lru_prev =
693 &sun4c_ulru_ring.ringhd;
694 sun4c_ulru_ring.num_entries = 0;
695 sun4c_kernel_ring.ringhd.next = sun4c_kernel_ring.ringhd.prev =
696 &sun4c_kernel_ring.ringhd;
697 sun4c_kernel_ring.num_entries = 0;
698 sun4c_kfree_ring.ringhd.next = sun4c_kfree_ring.ringhd.prev =
699 &sun4c_kfree_ring.ringhd;
700 sun4c_kfree_ring.num_entries = 0;
701}
702
703static void add_ring(struct sun4c_mmu_ring *ring,
704 struct sun4c_mmu_entry *entry)
705{
706 struct sun4c_mmu_entry *head = &ring->ringhd;
707
708 entry->prev = head;
709 (entry->next = head->next)->prev = entry;
710 head->next = entry;
711 ring->num_entries++;
712}
713
64d329ee 714static inline void add_lru(struct sun4c_mmu_entry *entry)
1da177e4
LT		 715{
716 struct sun4c_mmu_ring *ring = &sun4c_ulru_ring;
717 struct sun4c_mmu_entry *head = &ring->ringhd;
718
719 entry->lru_next = head;
720 (entry->lru_prev = head->lru_prev)->lru_next = entry;
721 head->lru_prev = entry;
722}
723
724static void add_ring_ordered(struct sun4c_mmu_ring *ring,
725 struct sun4c_mmu_entry *entry)
726{
727 struct sun4c_mmu_entry *head = &ring->ringhd;
728 unsigned long addr = entry->vaddr;
729
730 while ((head->next != &ring->ringhd) && (head->next->vaddr < addr))
731 head = head->next;
732
733 entry->prev = head;
734 (entry->next = head->next)->prev = entry;
735 head->next = entry;
736 ring->num_entries++;
737
738 add_lru(entry);
739}
740
64d329ee 741static inline void remove_ring(struct sun4c_mmu_ring *ring,
1da177e4
LT		 742 struct sun4c_mmu_entry *entry)
743{
744 struct sun4c_mmu_entry *next = entry->next;
745
746 (next->prev = entry->prev)->next = next;
747 ring->num_entries--;
748}
749
750static void remove_lru(struct sun4c_mmu_entry *entry)
751{
752 struct sun4c_mmu_entry *next = entry->lru_next;
753
754 (next->lru_prev = entry->lru_prev)->lru_next = next;
755}
756
757static void free_user_entry(int ctx, struct sun4c_mmu_entry *entry)
758{
759 remove_ring(sun4c_context_ring+ctx, entry);
760 remove_lru(entry);
761 add_ring(&sun4c_ufree_ring, entry);
762}
763
764static void free_kernel_entry(struct sun4c_mmu_entry *entry,
765 struct sun4c_mmu_ring *ring)
766{
767 remove_ring(ring, entry);
768 add_ring(&sun4c_kfree_ring, entry);
769}
770
771static void __init sun4c_init_fill_kernel_ring(int howmany)
772{
773 int i;
774
775 while (howmany) {
776 for (i = 0; i < invalid_segment; i++)
777 if (!mmu_entry_pool[i].locked)
778 break;
779 mmu_entry_pool[i].locked = 1;
780 sun4c_init_clean_segmap(i);
781 add_ring(&sun4c_kfree_ring, &mmu_entry_pool[i]);
782 howmany--;
783 }
784}
785
786static void __init sun4c_init_fill_user_ring(void)
787{
788 int i;
789
790 for (i = 0; i < invalid_segment; i++) {
791 if (mmu_entry_pool[i].locked)
792 continue;
793 sun4c_init_clean_segmap(i);
794 add_ring(&sun4c_ufree_ring, &mmu_entry_pool[i]);
795 }
796}
797
798static void sun4c_kernel_unmap(struct sun4c_mmu_entry *kentry)
799{
800 int savectx, ctx;
801
802 savectx = sun4c_get_context();
803 for (ctx = 0; ctx < num_contexts; ctx++) {
804 sun4c_set_context(ctx);
805 sun4c_put_segmap(kentry->vaddr, invalid_segment);
806 }
807 sun4c_set_context(savectx);
808}
809
810static void sun4c_kernel_map(struct sun4c_mmu_entry *kentry)
811{
812 int savectx, ctx;
813
814 savectx = sun4c_get_context();
815 for (ctx = 0; ctx < num_contexts; ctx++) {
816 sun4c_set_context(ctx);
817 sun4c_put_segmap(kentry->vaddr, kentry->pseg);
818 }
819 sun4c_set_context(savectx);
820}
821
822#define sun4c_user_unmap(__entry) \
823 sun4c_put_segmap((__entry)->vaddr, invalid_segment)
824
825static void sun4c_demap_context(struct sun4c_mmu_ring *crp, unsigned char ctx)
826{
827 struct sun4c_mmu_entry *head = &crp->ringhd;
828 unsigned long flags;
829
830 local_irq_save(flags);
831 if (head->next != head) {
832 struct sun4c_mmu_entry *entry = head->next;
833 int savectx = sun4c_get_context();
834
835 flush_user_windows();
836 sun4c_set_context(ctx);
837 sun4c_flush_context();
838 do {
839 struct sun4c_mmu_entry *next = entry->next;
840
841 sun4c_user_unmap(entry);
842 free_user_entry(ctx, entry);
843
844 entry = next;
845 } while (entry != head);
846 sun4c_set_context(savectx);
847 }
848 local_irq_restore(flags);
849}
850
851static int sun4c_user_taken_entries; /* This is how much we have. */
852static int max_user_taken_entries; /* This limits us and prevents deadlock. */
853
854static struct sun4c_mmu_entry *sun4c_kernel_strategy(void)
855{
856 struct sun4c_mmu_entry *this_entry;
857
858 /* If some are free, return first one. */
859 if (sun4c_kfree_ring.num_entries) {
860 this_entry = sun4c_kfree_ring.ringhd.next;
861 return this_entry;
862 }
863
864 /* Else free one up. */
865 this_entry = sun4c_kernel_ring.ringhd.prev;
866 sun4c_flush_segment(this_entry->vaddr);
867 sun4c_kernel_unmap(this_entry);
868 free_kernel_entry(this_entry, &sun4c_kernel_ring);
869 this_entry = sun4c_kfree_ring.ringhd.next;
870
871 return this_entry;
872}
873
874/* Using this method to free up mmu entries eliminates a lot of
875 * potential races since we have a kernel that incurs tlb
876 * replacement faults. There may be performance penalties.
877 *
878 * NOTE: Must be called with interrupts disabled.
879 */
880static struct sun4c_mmu_entry *sun4c_user_strategy(void)
881{
882 struct sun4c_mmu_entry *entry;
883 unsigned char ctx;
884 int savectx;
885
886 /* If some are free, return first one. */
887 if (sun4c_ufree_ring.num_entries) {
888 entry = sun4c_ufree_ring.ringhd.next;
889 goto unlink_out;
890 }
891
892 if (sun4c_user_taken_entries) {
893 entry = sun4c_kernel_strategy();
894 sun4c_user_taken_entries--;
895 goto kunlink_out;
896 }
897
898 /* Grab from the beginning of the LRU list. */
899 entry = sun4c_ulru_ring.ringhd.lru_next;
900 ctx = entry->ctx;
901
902 savectx = sun4c_get_context();
903 flush_user_windows();
904 sun4c_set_context(ctx);
905 sun4c_flush_segment(entry->vaddr);
906 sun4c_user_unmap(entry);
907 remove_ring(sun4c_context_ring + ctx, entry);
908 remove_lru(entry);
909 sun4c_set_context(savectx);
910
911 return entry;
912
913unlink_out:
914 remove_ring(&sun4c_ufree_ring, entry);
915 return entry;
916kunlink_out:
917 remove_ring(&sun4c_kfree_ring, entry);
918 return entry;
919}
920
921/* NOTE: Must be called with interrupts disabled. */
922void sun4c_grow_kernel_ring(void)
923{
924 struct sun4c_mmu_entry *entry;
925
926 /* Prevent deadlock condition. */
927 if (sun4c_user_taken_entries >= max_user_taken_entries)
928 return;
929
930 if (sun4c_ufree_ring.num_entries) {
931 entry = sun4c_ufree_ring.ringhd.next;
932 remove_ring(&sun4c_ufree_ring, entry);
933 add_ring(&sun4c_kfree_ring, entry);
934 sun4c_user_taken_entries++;
935 }
936}
937
938/* 2 page buckets for task struct and kernel stack allocation.
939 *
940 * TASK_STACK_BEGIN
941 * bucket[0]
942 * bucket[1]
943 * [ ... ]
944 * bucket[NR_TASK_BUCKETS-1]
945 * TASK_STACK_BEGIN + (sizeof(struct task_bucket) * NR_TASK_BUCKETS)
946 *
947 * Each slot looks like:
948 *
949 * page 1 -- task struct + beginning of kernel stack
950 * page 2 -- rest of kernel stack
951 */
952
953union task_union *sun4c_bucket[NR_TASK_BUCKETS];
954
955static int sun4c_lowbucket_avail;
956
957#define BUCKET_EMPTY ((union task_union *) 0)
958#define BUCKET_SHIFT (PAGE_SHIFT + 1) /* log2(sizeof(struct task_bucket)) */
959#define BUCKET_SIZE (1 << BUCKET_SHIFT)
960#define BUCKET_NUM(addr) ((((addr) - SUN4C_LOCK_VADDR) >> BUCKET_SHIFT))
961#define BUCKET_ADDR(num) (((num) << BUCKET_SHIFT) + SUN4C_LOCK_VADDR)
962#define BUCKET_PTE(page) \
963 ((((page) - PAGE_OFFSET) >> PAGE_SHIFT) | pgprot_val(SUN4C_PAGE_KERNEL))
964#define BUCKET_PTE_PAGE(pte) \
965 (PAGE_OFFSET + (((pte) & SUN4C_PFN_MASK) << PAGE_SHIFT))
966
967static void get_locked_segment(unsigned long addr)
968{
969 struct sun4c_mmu_entry *stolen;
970 unsigned long flags;
971
972 local_irq_save(flags);
973 addr &= SUN4C_REAL_PGDIR_MASK;
974 stolen = sun4c_user_strategy();
975 max_user_taken_entries--;
976 stolen->vaddr = addr;
977 flush_user_windows();
978 sun4c_kernel_map(stolen);
979 local_irq_restore(flags);
980}
981
982static void free_locked_segment(unsigned long addr)
983{
984 struct sun4c_mmu_entry *entry;
985 unsigned long flags;
986 unsigned char pseg;
987
988 local_irq_save(flags);
989 addr &= SUN4C_REAL_PGDIR_MASK;
990 pseg = sun4c_get_segmap(addr);
991 entry = &mmu_entry_pool[pseg];
992
993 flush_user_windows();
994 sun4c_flush_segment(addr);
995 sun4c_kernel_unmap(entry);
996 add_ring(&sun4c_ufree_ring, entry);
997 max_user_taken_entries++;
998 local_irq_restore(flags);
999}
1000
1001static inline void garbage_collect(int entry)
1002{
1003 int start, end;
1004
1005 /* 32 buckets per segment... */
1006 entry &= ~31;
1007 start = entry;
1008 for (end = (start + 32); start < end; start++)
1009 if (sun4c_bucket[start] != BUCKET_EMPTY)
1010 return;
1011
1012 /* Entire segment empty, release it. */
1013 free_locked_segment(BUCKET_ADDR(entry));
1014}
1015
1016static struct thread_info *sun4c_alloc_thread_info(void)
1017{
1018 unsigned long addr, pages;
1019 int entry;
1020
1021 pages = __get_free_pages(GFP_KERNEL, THREAD_INFO_ORDER);
1022 if (!pages)
1023 return NULL;
1024
1025 for (entry = sun4c_lowbucket_avail; entry < NR_TASK_BUCKETS; entry++)
1026 if (sun4c_bucket[entry] == BUCKET_EMPTY)
1027 break;
1028 if (entry == NR_TASK_BUCKETS) {
1029 free_pages(pages, THREAD_INFO_ORDER);
1030 return NULL;
1031 }
1032 if (entry >= sun4c_lowbucket_avail)
1033 sun4c_lowbucket_avail = entry + 1;
1034
1035 addr = BUCKET_ADDR(entry);
1036 sun4c_bucket[entry] = (union task_union *) addr;
1037 if(sun4c_get_segmap(addr) == invalid_segment)
1038 get_locked_segment(addr);
1039
1040 /* We are changing the virtual color of the page(s)
1041 * so we must flush the cache to guarantee consistency.
1042 */
1043 sun4c_flush_page(pages);
1044#ifndef CONFIG_SUN4
1045 sun4c_flush_page(pages + PAGE_SIZE);
1046#endif
1047
1048 sun4c_put_pte(addr, BUCKET_PTE(pages));
1049#ifndef CONFIG_SUN4
1050 sun4c_put_pte(addr + PAGE_SIZE, BUCKET_PTE(pages + PAGE_SIZE));
1051#endif
1052
1053#ifdef CONFIG_DEBUG_STACK_USAGE
1054 memset((void *)addr, 0, PAGE_SIZE << THREAD_INFO_ORDER);
1055#endif /* DEBUG_STACK_USAGE */
1056
1057 return (struct thread_info *) addr;
1058}
1059
1060static void sun4c_free_thread_info(struct thread_info *ti)
1061{
1062 unsigned long tiaddr = (unsigned long) ti;
1063 unsigned long pages = BUCKET_PTE_PAGE(sun4c_get_pte(tiaddr));
1064 int entry = BUCKET_NUM(tiaddr);
1065
1066 /* We are deleting a mapping, so the flush here is mandatory. */
1067 sun4c_flush_page(tiaddr);
1068#ifndef CONFIG_SUN4
1069 sun4c_flush_page(tiaddr + PAGE_SIZE);
1070#endif
1071 sun4c_put_pte(tiaddr, 0);
1072#ifndef CONFIG_SUN4
1073 sun4c_put_pte(tiaddr + PAGE_SIZE, 0);
1074#endif
1075 sun4c_bucket[entry] = BUCKET_EMPTY;
1076 if (entry < sun4c_lowbucket_avail)
1077 sun4c_lowbucket_avail = entry;
1078
1079 free_pages(pages, THREAD_INFO_ORDER);
1080 garbage_collect(entry);
1081}
1082
1083static void __init sun4c_init_buckets(void)
1084{
1085 int entry;
1086
1087 if (sizeof(union thread_union) != (PAGE_SIZE << THREAD_INFO_ORDER)) {
1088 extern void thread_info_size_is_bolixed_pete(void);
1089 thread_info_size_is_bolixed_pete();
1090 }
1091
1092 for (entry = 0; entry < NR_TASK_BUCKETS; entry++)
1093 sun4c_bucket[entry] = BUCKET_EMPTY;
1094 sun4c_lowbucket_avail = 0;
1095}
1096
1097static unsigned long sun4c_iobuffer_start;
1098static unsigned long sun4c_iobuffer_end;
1099static unsigned long sun4c_iobuffer_high;
1100static unsigned long *sun4c_iobuffer_map;
1101static int iobuffer_map_size;
1102
1103/*
1104 * Alias our pages so they do not cause a trap.
1105 * Also one page may be aliased into several I/O areas and we may
1106 * finish these I/O separately.
1107 */
1108static char *sun4c_lockarea(char *vaddr, unsigned long size)
1109{
1110 unsigned long base, scan;
1111 unsigned long npages;
1112 unsigned long vpage;
1113 unsigned long pte;
1114 unsigned long apage;
1115 unsigned long high;
1116 unsigned long flags;
1117
1118 npages = (((unsigned long)vaddr & ~PAGE_MASK) +
1119 size + (PAGE_SIZE-1)) >> PAGE_SHIFT;
1120
1121 scan = 0;
1122 local_irq_save(flags);
1123 for (;;) {
1124 scan = find_next_zero_bit(sun4c_iobuffer_map,
1125 iobuffer_map_size, scan);
1126 if ((base = scan) + npages > iobuffer_map_size) goto abend;
1127 for (;;) {
1128 if (scan >= base + npages) goto found;
1129 if (test_bit(scan, sun4c_iobuffer_map)) break;
1130 scan++;
1131 }
1132 }
1133
1134found:
1135 high = ((base + npages) << PAGE_SHIFT) + sun4c_iobuffer_start;
1136 high = SUN4C_REAL_PGDIR_ALIGN(high);
1137 while (high > sun4c_iobuffer_high) {
1138 get_locked_segment(sun4c_iobuffer_high);
1139 sun4c_iobuffer_high += SUN4C_REAL_PGDIR_SIZE;
1140 }
1141
1142 vpage = ((unsigned long) vaddr) & PAGE_MASK;
1143 for (scan = base; scan < base+npages; scan++) {
1144 pte = ((vpage-PAGE_OFFSET) >> PAGE_SHIFT);
1145 pte |= pgprot_val(SUN4C_PAGE_KERNEL);
1146 pte |= _SUN4C_PAGE_NOCACHE;
1147 set_bit(scan, sun4c_iobuffer_map);
1148 apage = (scan << PAGE_SHIFT) + sun4c_iobuffer_start;
1149
1150 /* Flush original mapping so we see the right things later. */
1151 sun4c_flush_page(vpage);
1152
1153 sun4c_put_pte(apage, pte);
1154 vpage += PAGE_SIZE;
1155 }
1156 local_irq_restore(flags);
1157 return (char *) ((base << PAGE_SHIFT) + sun4c_iobuffer_start +
1158 (((unsigned long) vaddr) & ~PAGE_MASK));
1159
1160abend:
1161 local_irq_restore(flags);
1162 printk("DMA vaddr=0x%p size=%08lx\n", vaddr, size);
1163 panic("Out of iobuffer table");
1164 return NULL;
1165}
1166
1167static void sun4c_unlockarea(char *vaddr, unsigned long size)
1168{
1169 unsigned long vpage, npages;
1170 unsigned long flags;
1171 int scan, high;
1172
1173 vpage = (unsigned long)vaddr & PAGE_MASK;
1174 npages = (((unsigned long)vaddr & ~PAGE_MASK) +
1175 size + (PAGE_SIZE-1)) >> PAGE_SHIFT;
1176
1177 local_irq_save(flags);
1178 while (npages != 0) {
1179 --npages;
1180
1181 /* This mapping is marked non-cachable, no flush necessary. */
1182 sun4c_put_pte(vpage, 0);
1183 clear_bit((vpage - sun4c_iobuffer_start) >> PAGE_SHIFT,
1184 sun4c_iobuffer_map);
1185 vpage += PAGE_SIZE;
1186 }
1187
1188 /* garbage collect */
1189 scan = (sun4c_iobuffer_high - sun4c_iobuffer_start) >> PAGE_SHIFT;
1190 while (scan >= 0 && !sun4c_iobuffer_map[scan >> 5])
1191 scan -= 32;
1192 scan += 32;
1193 high = sun4c_iobuffer_start + (scan << PAGE_SHIFT);
1194 high = SUN4C_REAL_PGDIR_ALIGN(high) + SUN4C_REAL_PGDIR_SIZE;
1195 while (high < sun4c_iobuffer_high) {
1196 sun4c_iobuffer_high -= SUN4C_REAL_PGDIR_SIZE;
1197 free_locked_segment(sun4c_iobuffer_high);
1198 }
1199 local_irq_restore(flags);
1200}
1201
1202/* Note the scsi code at init time passes to here buffers
1203 * which sit on the kernel stack, those are already locked
1204 * by implication and fool the page locking code above
1205 * if passed to by mistake.
1206 */
1207static __u32 sun4c_get_scsi_one(char *bufptr, unsigned long len, struct sbus_bus *sbus)
1208{
1209 unsigned long page;
1210
1211 page = ((unsigned long)bufptr) & PAGE_MASK;
1212 if (!virt_addr_valid(page)) {
1213 sun4c_flush_page(page);
1214 return (__u32)bufptr; /* already locked */
1215 }
1216 return (__u32)sun4c_lockarea(bufptr, len);
1217}
1218
1219static void sun4c_get_scsi_sgl(struct scatterlist *sg, int sz, struct sbus_bus *sbus)
1220{
1221 while (sz != 0) {
1222 --sz;
58b053e4 1223 sg->dvma_address = (__u32)sun4c_lockarea(sg_virt(sg), sg->length);
0912a5db
JA		 1224 sg->dvma_length = sg->length;
1225 sg = sg_next(sg);
1da177e4
LT		 1226 }
1227}
1228
1229static void sun4c_release_scsi_one(__u32 bufptr, unsigned long len, struct sbus_bus *sbus)
1230{
1231 if (bufptr < sun4c_iobuffer_start)
1232 return; /* On kernel stack or similar, see above */
1233 sun4c_unlockarea((char *)bufptr, len);
1234}
1235
1236static void sun4c_release_scsi_sgl(struct scatterlist *sg, int sz, struct sbus_bus *sbus)
1237{
1238 while (sz != 0) {
1239 --sz;
0912a5db
JA		 1240 sun4c_unlockarea((char *)sg->dvma_address, sg->length);
1241 sg = sg_next(sg);
1da177e4
LT		 1242 }
1243}
1244
1245#define TASK_ENTRY_SIZE BUCKET_SIZE /* see above */
1246#define LONG_ALIGN(x) (((x)+(sizeof(long))-1)&~((sizeof(long))-1))
1247
1248struct vm_area_struct sun4c_kstack_vma;
1249
1250static void __init sun4c_init_lock_areas(void)
1251{
1252 unsigned long sun4c_taskstack_start;
1253 unsigned long sun4c_taskstack_end;
1254 int bitmap_size;
1255
1256 sun4c_init_buckets();
1257 sun4c_taskstack_start = SUN4C_LOCK_VADDR;
1258 sun4c_taskstack_end = (sun4c_taskstack_start +
1259 (TASK_ENTRY_SIZE * NR_TASK_BUCKETS));
1260 if (sun4c_taskstack_end >= SUN4C_LOCK_END) {
1261 prom_printf("Too many tasks, decrease NR_TASK_BUCKETS please.\n");
1262 prom_halt();
1263 }
1264
1265 sun4c_iobuffer_start = sun4c_iobuffer_high =
1266 SUN4C_REAL_PGDIR_ALIGN(sun4c_taskstack_end);
1267 sun4c_iobuffer_end = SUN4C_LOCK_END;
1268 bitmap_size = (sun4c_iobuffer_end - sun4c_iobuffer_start) >> PAGE_SHIFT;
1269 bitmap_size = (bitmap_size + 7) >> 3;
1270 bitmap_size = LONG_ALIGN(bitmap_size);
1271 iobuffer_map_size = bitmap_size << 3;
1272 sun4c_iobuffer_map = __alloc_bootmem(bitmap_size, SMP_CACHE_BYTES, 0UL);
1273 memset((void *) sun4c_iobuffer_map, 0, bitmap_size);
1274
1275 sun4c_kstack_vma.vm_mm = &init_mm;
1276 sun4c_kstack_vma.vm_start = sun4c_taskstack_start;
1277 sun4c_kstack_vma.vm_end = sun4c_taskstack_end;
1278 sun4c_kstack_vma.vm_page_prot = PAGE_SHARED;
1279 sun4c_kstack_vma.vm_flags = VM_READ | VM_WRITE | VM_EXEC;
1280 insert_vm_struct(&init_mm, &sun4c_kstack_vma);
1281}
1282
1283/* Cache flushing on the sun4c. */
1284static void sun4c_flush_cache_all(void)
1285{
1286 unsigned long begin, end;
1287
1288 flush_user_windows();
1289 begin = (KERNBASE + SUN4C_REAL_PGDIR_SIZE);
1290 end = (begin + SUN4C_VAC_SIZE);
1291
1292 if (sun4c_vacinfo.linesize == 32) {
1293 while (begin < end) {
1294 __asm__ __volatile__(
1295 "ld [%0 + 0x00], %%g0\n\t"
1296 "ld [%0 + 0x20], %%g0\n\t"
1297 "ld [%0 + 0x40], %%g0\n\t"
1298 "ld [%0 + 0x60], %%g0\n\t"
1299 "ld [%0 + 0x80], %%g0\n\t"
1300 "ld [%0 + 0xa0], %%g0\n\t"
1301 "ld [%0 + 0xc0], %%g0\n\t"
1302 "ld [%0 + 0xe0], %%g0\n\t"
1303 "ld [%0 + 0x100], %%g0\n\t"
1304 "ld [%0 + 0x120], %%g0\n\t"
1305 "ld [%0 + 0x140], %%g0\n\t"
1306 "ld [%0 + 0x160], %%g0\n\t"
1307 "ld [%0 + 0x180], %%g0\n\t"
1308 "ld [%0 + 0x1a0], %%g0\n\t"
1309 "ld [%0 + 0x1c0], %%g0\n\t"
1310 "ld [%0 + 0x1e0], %%g0\n"
1311 : : "r" (begin));
1312 begin += 512;
1313 }
1314 } else {
1315 while (begin < end) {
1316 __asm__ __volatile__(
1317 "ld [%0 + 0x00], %%g0\n\t"
1318 "ld [%0 + 0x10], %%g0\n\t"
1319 "ld [%0 + 0x20], %%g0\n\t"
1320 "ld [%0 + 0x30], %%g0\n\t"
1321 "ld [%0 + 0x40], %%g0\n\t"
1322 "ld [%0 + 0x50], %%g0\n\t"
1323 "ld [%0 + 0x60], %%g0\n\t"
1324 "ld [%0 + 0x70], %%g0\n\t"
1325 "ld [%0 + 0x80], %%g0\n\t"
1326 "ld [%0 + 0x90], %%g0\n\t"
1327 "ld [%0 + 0xa0], %%g0\n\t"
1328 "ld [%0 + 0xb0], %%g0\n\t"
1329 "ld [%0 + 0xc0], %%g0\n\t"
1330 "ld [%0 + 0xd0], %%g0\n\t"
1331 "ld [%0 + 0xe0], %%g0\n\t"
1332 "ld [%0 + 0xf0], %%g0\n"
1333 : : "r" (begin));
1334 begin += 256;
1335 }
1336 }
1337}
1338
1339static void sun4c_flush_cache_mm(struct mm_struct *mm)
1340{
1341 int new_ctx = mm->context;
1342
1343 if (new_ctx != NO_CONTEXT) {
1344 flush_user_windows();
1345
1346 if (sun4c_context_ring[new_ctx].num_entries) {
1347 struct sun4c_mmu_entry *head = &sun4c_context_ring[new_ctx].ringhd;
1348 unsigned long flags;
1349
1350 local_irq_save(flags);
1351 if (head->next != head) {
1352 struct sun4c_mmu_entry *entry = head->next;
1353 int savectx = sun4c_get_context();
1354
1355 sun4c_set_context(new_ctx);
1356 sun4c_flush_context();
1357 do {
1358 struct sun4c_mmu_entry *next = entry->next;
1359
1360 sun4c_user_unmap(entry);
1361 free_user_entry(new_ctx, entry);
1362
1363 entry = next;
1364 } while (entry != head);
1365 sun4c_set_context(savectx);
1366 }
1367 local_irq_restore(flags);
1368 }
1369 }
1370}
1371
1372static void sun4c_flush_cache_range(struct vm_area_struct *vma, unsigned long start, unsigned long end)
1373{
1374 struct mm_struct *mm = vma->vm_mm;
1375 int new_ctx = mm->context;
1376
1377 if (new_ctx != NO_CONTEXT) {
1378 struct sun4c_mmu_entry *head = &sun4c_context_ring[new_ctx].ringhd;
1379 struct sun4c_mmu_entry *entry;
1380 unsigned long flags;
1381
1382 flush_user_windows();
1383
1384 local_irq_save(flags);
1385 /* All user segmap chains are ordered on entry->vaddr. */
1386 for (entry = head->next;
1387 (entry != head) && ((entry->vaddr+SUN4C_REAL_PGDIR_SIZE) < start);
1388 entry = entry->next)
1389 ;
1390
1391 /* Tracing various job mixtures showed that this conditional
1392 * only passes ~35% of the time for most worse case situations,
1393 * therefore we avoid all of this gross overhead ~65% of the time.
1394 */
1395 if ((entry != head) && (entry->vaddr < end)) {
1396 int octx = sun4c_get_context();
1397 sun4c_set_context(new_ctx);
1398
1399 /* At this point, always, (start >= entry->vaddr) and
1400 * (entry->vaddr < end), once the latter condition
1401 * ceases to hold, or we hit the end of the list, we
1402 * exit the loop. The ordering of all user allocated
1403 * segmaps makes this all work out so beautifully.
1404 */
1405 do {
1406 struct sun4c_mmu_entry *next = entry->next;
1407 unsigned long realend;
1408
1409 /* "realstart" is always >= entry->vaddr */
1410 realend = entry->vaddr + SUN4C_REAL_PGDIR_SIZE;
1411 if (end < realend)
1412 realend = end;
1413 if ((realend - entry->vaddr) <= (PAGE_SIZE << 3)) {
1414 unsigned long page = entry->vaddr;
1415 while (page < realend) {
1416 sun4c_flush_page(page);
1417 page += PAGE_SIZE;
1418 }
1419 } else {
1420 sun4c_flush_segment(entry->vaddr);
1421 sun4c_user_unmap(entry);
1422 free_user_entry(new_ctx, entry);
1423 }
1424 entry = next;
1425 } while ((entry != head) && (entry->vaddr < end));
1426 sun4c_set_context(octx);
1427 }
1428 local_irq_restore(flags);
1429 }
1430}
1431
1432static void sun4c_flush_cache_page(struct vm_area_struct *vma, unsigned long page)
1433{
1434 struct mm_struct *mm = vma->vm_mm;
1435 int new_ctx = mm->context;
1436
1437 /* Sun4c has no separate I/D caches so cannot optimize for non
1438 * text page flushes.
1439 */
1440 if (new_ctx != NO_CONTEXT) {
1441 int octx = sun4c_get_context();
1442 unsigned long flags;
1443
1444 flush_user_windows();
1445 local_irq_save(flags);
1446 sun4c_set_context(new_ctx);
1447 sun4c_flush_page(page);
1448 sun4c_set_context(octx);
1449 local_irq_restore(flags);
1450 }
1451}
1452
1453static void sun4c_flush_page_to_ram(unsigned long page)
1454{
1455 unsigned long flags;
1456
1457 local_irq_save(flags);
1458 sun4c_flush_page(page);
1459 local_irq_restore(flags);
1460}
1461
1462/* Sun4c cache is unified, both instructions and data live there, so
1463 * no need to flush the on-stack instructions for new signal handlers.
1464 */
1465static void sun4c_flush_sig_insns(struct mm_struct *mm, unsigned long insn_addr)
1466{
1467}
1468
1469/* TLB flushing on the sun4c. These routines count on the cache
1470 * flushing code to flush the user register windows so that we need
1471 * not do so when we get here.
1472 */
1473
1474static void sun4c_flush_tlb_all(void)
1475{
1476 struct sun4c_mmu_entry *this_entry, *next_entry;
1477 unsigned long flags;
1478 int savectx, ctx;
1479
1480 local_irq_save(flags);
1481 this_entry = sun4c_kernel_ring.ringhd.next;
1482 savectx = sun4c_get_context();
1483 flush_user_windows();
1484 while (sun4c_kernel_ring.num_entries) {
1485 next_entry = this_entry->next;
1486 sun4c_flush_segment(this_entry->vaddr);
1487 for (ctx = 0; ctx < num_contexts; ctx++) {
1488 sun4c_set_context(ctx);
1489 sun4c_put_segmap(this_entry->vaddr, invalid_segment);
1490 }
1491 free_kernel_entry(this_entry, &sun4c_kernel_ring);
1492 this_entry = next_entry;
1493 }
1494 sun4c_set_context(savectx);
1495 local_irq_restore(flags);
1496}
1497
1498static void sun4c_flush_tlb_mm(struct mm_struct *mm)
1499{
1500 int new_ctx = mm->context;
1501
1502 if (new_ctx != NO_CONTEXT) {
1503 struct sun4c_mmu_entry *head = &sun4c_context_ring[new_ctx].ringhd;
1504 unsigned long flags;
1505
1506 local_irq_save(flags);
1507 if (head->next != head) {
1508 struct sun4c_mmu_entry *entry = head->next;
1509 int savectx = sun4c_get_context();
1510
1511 sun4c_set_context(new_ctx);
1512 sun4c_flush_context();
1513 do {
1514 struct sun4c_mmu_entry *next = entry->next;
1515
1516 sun4c_user_unmap(entry);
1517 free_user_entry(new_ctx, entry);
1518
1519 entry = next;
1520 } while (entry != head);
1521 sun4c_set_context(savectx);
1522 }
1523 local_irq_restore(flags);
1524 }
1525}
1526
1527static void sun4c_flush_tlb_range(struct vm_area_struct *vma, unsigned long start, unsigned long end)
1528{
1529 struct mm_struct *mm = vma->vm_mm;
1530 int new_ctx = mm->context;
1531
1532 if (new_ctx != NO_CONTEXT) {
1533 struct sun4c_mmu_entry *head = &sun4c_context_ring[new_ctx].ringhd;
1534 struct sun4c_mmu_entry *entry;
1535 unsigned long flags;
1536
1537 local_irq_save(flags);
1538 /* See commentary in sun4c_flush_cache_range(). */
1539 for (entry = head->next;
1540 (entry != head) && ((entry->vaddr+SUN4C_REAL_PGDIR_SIZE) < start);
1541 entry = entry->next)
1542 ;
1543
1544 if ((entry != head) && (entry->vaddr < end)) {
1545 int octx = sun4c_get_context();
1546
1547 sun4c_set_context(new_ctx);
1548 do {
1549 struct sun4c_mmu_entry *next = entry->next;
1550
1551 sun4c_flush_segment(entry->vaddr);
1552 sun4c_user_unmap(entry);
1553 free_user_entry(new_ctx, entry);
1554
1555 entry = next;
1556 } while ((entry != head) && (entry->vaddr < end));
1557 sun4c_set_context(octx);
1558 }
1559 local_irq_restore(flags);
1560 }
1561}
1562
1563static void sun4c_flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
1564{
1565 struct mm_struct *mm = vma->vm_mm;
1566 int new_ctx = mm->context;
1567
1568 if (new_ctx != NO_CONTEXT) {
1569 int savectx = sun4c_get_context();
1570 unsigned long flags;
1571
1572 local_irq_save(flags);
1573 sun4c_set_context(new_ctx);
1574 page &= PAGE_MASK;
1575 sun4c_flush_page(page);
1576 sun4c_put_pte(page, 0);
1577 sun4c_set_context(savectx);
1578 local_irq_restore(flags);
1579 }
1580}
1581
1582static inline void sun4c_mapioaddr(unsigned long physaddr, unsigned long virt_addr)
1583{
14778d90
DM		 1584 unsigned long page_entry, pg_iobits;
1585
1586 pg_iobits = _SUN4C_PAGE_PRESENT | _SUN4C_READABLE | _SUN4C_WRITEABLE |
1587 _SUN4C_PAGE_IO | _SUN4C_PAGE_NOCACHE;
1da177e4
LT		 1588
1589 page_entry = ((physaddr >> PAGE_SHIFT) & SUN4C_PFN_MASK);
1590 page_entry |= ((pg_iobits | _SUN4C_PAGE_PRIV) & ~(_SUN4C_PAGE_PRESENT));
1591 sun4c_put_pte(virt_addr, page_entry);
1592}
1593
1594static void sun4c_mapiorange(unsigned int bus, unsigned long xpa,
1595 unsigned long xva, unsigned int len)
1596{
1597 while (len != 0) {
1598 len -= PAGE_SIZE;
1599 sun4c_mapioaddr(xpa, xva);
1600 xva += PAGE_SIZE;
1601 xpa += PAGE_SIZE;
1602 }
1603}
1604
1605static void sun4c_unmapiorange(unsigned long virt_addr, unsigned int len)
1606{
1607 while (len != 0) {
1608 len -= PAGE_SIZE;
1609 sun4c_put_pte(virt_addr, 0);
1610 virt_addr += PAGE_SIZE;
1611 }
1612}
1613
1614static void sun4c_alloc_context(struct mm_struct *old_mm, struct mm_struct *mm)
1615{
1616 struct ctx_list *ctxp;
1617
1618 ctxp = ctx_free.next;
1619 if (ctxp != &ctx_free) {
1620 remove_from_ctx_list(ctxp);
1621 add_to_used_ctxlist(ctxp);
1622 mm->context = ctxp->ctx_number;
1623 ctxp->ctx_mm = mm;
1624 return;
1625 }
1626 ctxp = ctx_used.next;
1627 if (ctxp->ctx_mm == old_mm)
1628 ctxp = ctxp->next;
1629 remove_from_ctx_list(ctxp);
1630 add_to_used_ctxlist(ctxp);
1631 ctxp->ctx_mm->context = NO_CONTEXT;
1632 ctxp->ctx_mm = mm;
1633 mm->context = ctxp->ctx_number;
1634 sun4c_demap_context(&sun4c_context_ring[ctxp->ctx_number],
1635 ctxp->ctx_number);
1636}
1637
1638/* Switch the current MM context. */
1639static void sun4c_switch_mm(struct mm_struct *old_mm, struct mm_struct *mm, struct task_struct *tsk, int cpu)
1640{
1641 struct ctx_list *ctx;
1642 int dirty = 0;
1643
1644 if (mm->context == NO_CONTEXT) {
1645 dirty = 1;
1646 sun4c_alloc_context(old_mm, mm);
1647 } else {
1648 /* Update the LRU ring of contexts. */
1649 ctx = ctx_list_pool + mm->context;
1650 remove_from_ctx_list(ctx);
1651 add_to_used_ctxlist(ctx);
1652 }
1653 if (dirty || old_mm != mm)
1654 sun4c_set_context(mm->context);
1655}
1656
1657static void sun4c_destroy_context(struct mm_struct *mm)
1658{
1659 struct ctx_list *ctx_old;
1660
1661 if (mm->context != NO_CONTEXT) {
1662 sun4c_demap_context(&sun4c_context_ring[mm->context], mm->context);
1663 ctx_old = ctx_list_pool + mm->context;
1664 remove_from_ctx_list(ctx_old);
1665 add_to_free_ctxlist(ctx_old);
1666 mm->context = NO_CONTEXT;
1667 }
1668}
1669
1670static void sun4c_mmu_info(struct seq_file *m)
1671{
1672 int used_user_entries, i;
1673
1674 used_user_entries = 0;
1675 for (i = 0; i < num_contexts; i++)
1676 used_user_entries += sun4c_context_ring[i].num_entries;
1677
1678 seq_printf(m,
1679 "vacsize\t\t: %d bytes\n"
1680 "vachwflush\t: %s\n"
1681 "vaclinesize\t: %d bytes\n"
1682 "mmuctxs\t\t: %d\n"
1683 "mmupsegs\t: %d\n"
1684 "kernelpsegs\t: %d\n"
1685 "kfreepsegs\t: %d\n"
1686 "usedpsegs\t: %d\n"
1687 "ufreepsegs\t: %d\n"
1688 "user_taken\t: %d\n"
1689 "max_taken\t: %d\n",
1690 sun4c_vacinfo.num_bytes,
1691 (sun4c_vacinfo.do_hwflushes ? "yes" : "no"),
1692 sun4c_vacinfo.linesize,
1693 num_contexts,
1694 (invalid_segment + 1),
1695 sun4c_kernel_ring.num_entries,
1696 sun4c_kfree_ring.num_entries,
1697 used_user_entries,
1698 sun4c_ufree_ring.num_entries,
1699 sun4c_user_taken_entries,
1700 max_user_taken_entries);
1701}
1702
1703/* Nothing below here should touch the mmu hardware nor the mmu_entry
1704 * data structures.
1705 */
1706
1707/* First the functions which the mid-level code uses to directly
1708 * manipulate the software page tables. Some defines since we are
1709 * emulating the i386 page directory layout.
1710 */
1711#define PGD_PRESENT 0x001
1712#define PGD_RW 0x002
1713#define PGD_USER 0x004
1714#define PGD_ACCESSED 0x020
1715#define PGD_DIRTY 0x040
1716#define PGD_TABLE (PGD_PRESENT | PGD_RW | PGD_USER | PGD_ACCESSED | PGD_DIRTY)
1717
1718static void sun4c_set_pte(pte_t *ptep, pte_t pte)
1719{
1720 *ptep = pte;
1721}
1722
1723static void sun4c_pgd_set(pgd_t * pgdp, pmd_t * pmdp)
1724{
1725}
1726
1727static void sun4c_pmd_set(pmd_t * pmdp, pte_t * ptep)
1728{
1729 pmdp->pmdv[0] = PGD_TABLE | (unsigned long) ptep;
1730}
1731
1732static void sun4c_pmd_populate(pmd_t * pmdp, struct page * ptep)
1733{
1734 if (page_address(ptep) == NULL) BUG(); /* No highmem on sun4c */
1735 pmdp->pmdv[0] = PGD_TABLE | (unsigned long) page_address(ptep);
1736}
1737
1738static int sun4c_pte_present(pte_t pte)
1739{
1740 return ((pte_val(pte) & (_SUN4C_PAGE_PRESENT | _SUN4C_PAGE_PRIV)) != 0);
1741}
1742static void sun4c_pte_clear(pte_t *ptep) { *ptep = __pte(0); }
1743
1da177e4
LT		 1744static int sun4c_pmd_bad(pmd_t pmd)
1745{
1746 return (((pmd_val(pmd) & ~PAGE_MASK) != PGD_TABLE) ||
1747 (!virt_addr_valid(pmd_val(pmd))));
1748}
1749
1750static int sun4c_pmd_present(pmd_t pmd)
1751{
1752 return ((pmd_val(pmd) & PGD_PRESENT) != 0);
1753}
1754
1755#if 0 /* if PMD takes one word */
1756static void sun4c_pmd_clear(pmd_t *pmdp) { *pmdp = __pmd(0); }
1757#else /* if pmd_t is a longish aggregate */
1758static void sun4c_pmd_clear(pmd_t *pmdp) {
1759 memset((void *)pmdp, 0, sizeof(pmd_t));
1760}
1761#endif
1762
1763static int sun4c_pgd_none(pgd_t pgd) { return 0; }
1764static int sun4c_pgd_bad(pgd_t pgd) { return 0; }
1765static int sun4c_pgd_present(pgd_t pgd) { return 1; }
1766static void sun4c_pgd_clear(pgd_t * pgdp) { }
1767
1768/*
1769 * The following only work if pte_present() is true.
1770 * Undefined behaviour if not..
1771 */
1772static pte_t sun4c_pte_mkwrite(pte_t pte)
1773{
1774 pte = __pte(pte_val(pte) | _SUN4C_PAGE_WRITE);
1775 if (pte_val(pte) & _SUN4C_PAGE_MODIFIED)
1776 pte = __pte(pte_val(pte) | _SUN4C_PAGE_SILENT_WRITE);
1777 return pte;
1778}
1779
1780static pte_t sun4c_pte_mkdirty(pte_t pte)
1781{
1782 pte = __pte(pte_val(pte) | _SUN4C_PAGE_MODIFIED);
1783 if (pte_val(pte) & _SUN4C_PAGE_WRITE)
1784 pte = __pte(pte_val(pte) | _SUN4C_PAGE_SILENT_WRITE);
1785 return pte;
1786}
1787
1788static pte_t sun4c_pte_mkyoung(pte_t pte)
1789{
1790 pte = __pte(pte_val(pte) | _SUN4C_PAGE_ACCESSED);
1791 if (pte_val(pte) & _SUN4C_PAGE_READ)
1792 pte = __pte(pte_val(pte) | _SUN4C_PAGE_SILENT_READ);
1793 return pte;
1794}
1795
1796/*
1797 * Conversion functions: convert a page and protection to a page entry,
1798 * and a page entry and page directory to the page they refer to.
1799 */
1800static pte_t sun4c_mk_pte(struct page *page, pgprot_t pgprot)
1801{
1802 return __pte(page_to_pfn(page) | pgprot_val(pgprot));
1803}
1804
1805static pte_t sun4c_mk_pte_phys(unsigned long phys_page, pgprot_t pgprot)
1806{
1807 return __pte((phys_page >> PAGE_SHIFT) | pgprot_val(pgprot));
1808}
1809
1810static pte_t sun4c_mk_pte_io(unsigned long page, pgprot_t pgprot, int space)
1811{
1812 return __pte(((page - PAGE_OFFSET) >> PAGE_SHIFT) | pgprot_val(pgprot));
1813}
1814
1815static unsigned long sun4c_pte_pfn(pte_t pte)
1816{
1817 return pte_val(pte) & SUN4C_PFN_MASK;
1818}
1819
1820static pte_t sun4c_pgoff_to_pte(unsigned long pgoff)
1821{
1822 return __pte(pgoff | _SUN4C_PAGE_FILE);
1823}
1824
1825static unsigned long sun4c_pte_to_pgoff(pte_t pte)
1826{
1827 return pte_val(pte) & ((1UL << PTE_FILE_MAX_BITS) - 1);
1828}
1829
1830
64d329ee 1831static inline unsigned long sun4c_pmd_page_v(pmd_t pmd)
1da177e4
LT		 1832{
1833 return (pmd_val(pmd) & PAGE_MASK);
1834}
1835
1836static struct page *sun4c_pmd_page(pmd_t pmd)
1837{
1838 return virt_to_page(sun4c_pmd_page_v(pmd));
1839}
1840
1841static unsigned long sun4c_pgd_page(pgd_t pgd) { return 0; }
1842
1843/* to find an entry in a page-table-directory */
1844static inline pgd_t *sun4c_pgd_offset(struct mm_struct * mm, unsigned long address)
1845{
1846 return mm->pgd + (address >> SUN4C_PGDIR_SHIFT);
1847}
1848
1849/* Find an entry in the second-level page table.. */
1850static pmd_t *sun4c_pmd_offset(pgd_t * dir, unsigned long address)
1851{
1852 return (pmd_t *) dir;
1853}
1854
1855/* Find an entry in the third-level page table.. */
1856pte_t *sun4c_pte_offset_kernel(pmd_t * dir, unsigned long address)
1857{
1858 return (pte_t *) sun4c_pmd_page_v(*dir) +
1859 ((address >> PAGE_SHIFT) & (SUN4C_PTRS_PER_PTE - 1));
1860}
1861
1862static unsigned long sun4c_swp_type(swp_entry_t entry)
1863{
1864 return (entry.val & SUN4C_SWP_TYPE_MASK);
1865}
1866
1867static unsigned long sun4c_swp_offset(swp_entry_t entry)
1868{
1869 return (entry.val >> SUN4C_SWP_OFF_SHIFT) & SUN4C_SWP_OFF_MASK;
1870}
1871
1872static swp_entry_t sun4c_swp_entry(unsigned long type, unsigned long offset)
1873{
1874 return (swp_entry_t) {
1875 (offset & SUN4C_SWP_OFF_MASK) << SUN4C_SWP_OFF_SHIFT
1876 | (type & SUN4C_SWP_TYPE_MASK) };
1877}
1878
1879static void sun4c_free_pte_slow(pte_t *pte)
1880{
1881 free_page((unsigned long)pte);
1882}
1883
1884static void sun4c_free_pgd_slow(pgd_t *pgd)
1885{
1886 free_page((unsigned long)pgd);
1887}
1888
1889static pgd_t *sun4c_get_pgd_fast(void)
1890{
1891 unsigned long *ret;
1892
1893 if ((ret = pgd_quicklist) != NULL) {
1894 pgd_quicklist = (unsigned long *)(*ret);
1895 ret[0] = ret[1];
1896 pgtable_cache_size--;
1897 } else {
1898 pgd_t *init;
1899
1900 ret = (unsigned long *)__get_free_page(GFP_KERNEL);
1901 memset (ret, 0, (KERNBASE / SUN4C_PGDIR_SIZE) * sizeof(pgd_t));
1902 init = sun4c_pgd_offset(&init_mm, 0);
1903 memcpy (((pgd_t *)ret) + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,
1904 (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
1905 }
1906 return (pgd_t *)ret;
1907}
1908
1909static void sun4c_free_pgd_fast(pgd_t *pgd)
1910{
1911 *(unsigned long *)pgd = (unsigned long) pgd_quicklist;
1912 pgd_quicklist = (unsigned long *) pgd;
1913 pgtable_cache_size++;
1914}
1915
1916
64d329ee 1917static inline pte_t *
1da177e4
LT		 1918sun4c_pte_alloc_one_fast(struct mm_struct *mm, unsigned long address)
1919{
1920 unsigned long *ret;
1921
1922 if ((ret = (unsigned long *)pte_quicklist) != NULL) {
1923 pte_quicklist = (unsigned long *)(*ret);
1924 ret[0] = ret[1];
1925 pgtable_cache_size--;
1926 }
1927 return (pte_t *)ret;
1928}
1929
1930static pte_t *sun4c_pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
1931{
1932 pte_t *pte;
1933
1934 if ((pte = sun4c_pte_alloc_one_fast(mm, address)) != NULL)
1935 return pte;
1936
b3dd5b82 1937 pte = (pte_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT);
1da177e4
LT		 1938 return pte;
1939}
1940
2f569afd 1941static pgtable_t sun4c_pte_alloc_one(struct mm_struct *mm, unsigned long address)
1da177e4 1942{
2f569afd
MS		 1943 pte_t *pte;
1944 struct page *page;
1945
1946 pte = sun4c_pte_alloc_one_kernel(mm, address);
1da177e4
LT		 1947 if (pte == NULL)
1948 return NULL;
2f569afd
MS		 1949 page = virt_to_page(pte);
1950 pgtable_page_ctor(page);
1951 return page;
1da177e4
LT		 1952}
1953
64d329ee 1954static inline void sun4c_free_pte_fast(pte_t *pte)
1da177e4
LT		 1955{
1956 *(unsigned long *)pte = (unsigned long) pte_quicklist;
1957 pte_quicklist = (unsigned long *) pte;
1958 pgtable_cache_size++;
1959}
1960
2f569afd 1961static void sun4c_pte_free(pgtable_t pte)
1da177e4 1962{
2f569afd 1963 pgtable_page_dtor(pte);
1da177e4
LT		 1964 sun4c_free_pte_fast(page_address(pte));
1965}
1966
1967/*
1968 * allocating and freeing a pmd is trivial: the 1-entry pmd is
1969 * inside the pgd, so has no extra memory associated with it.
1970 */
1971static pmd_t *sun4c_pmd_alloc_one(struct mm_struct *mm, unsigned long address)
1972{
1973 BUG();
1974 return NULL;
1975}
1976
1977static void sun4c_free_pmd_fast(pmd_t * pmd) { }
1978
1979static void sun4c_check_pgt_cache(int low, int high)
1980{
1981 if (pgtable_cache_size > high) {
1982 do {
1983 if (pgd_quicklist)
1984 sun4c_free_pgd_slow(sun4c_get_pgd_fast());
1985 if (pte_quicklist)
1986 sun4c_free_pte_slow(sun4c_pte_alloc_one_fast(NULL, 0));
1987 } while (pgtable_cache_size > low);
1988 }
1989}
1990
1991/* An experiment, turn off by default for now... -DaveM */
1992#define SUN4C_PRELOAD_PSEG
1993
1994void sun4c_update_mmu_cache(struct vm_area_struct *vma, unsigned long address, pte_t pte)
1995{
1996 unsigned long flags;
1997 int pseg;
1998
da4e9fea
MF		 1999 if (vma->vm_mm->context == NO_CONTEXT)
2000 return;
2001
1da177e4
LT		 2002 local_irq_save(flags);
2003 address &= PAGE_MASK;
2004 if ((pseg = sun4c_get_segmap(address)) == invalid_segment) {
2005 struct sun4c_mmu_entry *entry = sun4c_user_strategy();
2006 struct mm_struct *mm = vma->vm_mm;
2007 unsigned long start, end;
2008
2009 entry->vaddr = start = (address & SUN4C_REAL_PGDIR_MASK);
2010 entry->ctx = mm->context;
2011 add_ring_ordered(sun4c_context_ring + mm->context, entry);
2012 sun4c_put_segmap(entry->vaddr, entry->pseg);
2013 end = start + SUN4C_REAL_PGDIR_SIZE;
2014 while (start < end) {
2015#ifdef SUN4C_PRELOAD_PSEG
2016 pgd_t *pgdp = sun4c_pgd_offset(mm, start);
2017 pte_t *ptep;
2018
2019 if (!pgdp)
2020 goto no_mapping;
2021 ptep = sun4c_pte_offset_kernel((pmd_t *) pgdp, start);
2022 if (!ptep || !(pte_val(*ptep) & _SUN4C_PAGE_PRESENT))
2023 goto no_mapping;
2024 sun4c_put_pte(start, pte_val(*ptep));
2025 goto next;
2026
2027 no_mapping:
2028#endif
2029 sun4c_put_pte(start, 0);
2030#ifdef SUN4C_PRELOAD_PSEG
2031 next:
2032#endif
2033 start += PAGE_SIZE;
2034 }
2035#ifndef SUN4C_PRELOAD_PSEG
2036 sun4c_put_pte(address, pte_val(pte));
2037#endif
2038 local_irq_restore(flags);
2039 return;
2040 } else {
2041 struct sun4c_mmu_entry *entry = &mmu_entry_pool[pseg];
2042
2043 remove_lru(entry);
2044 add_lru(entry);
2045 }
2046
2047 sun4c_put_pte(address, pte_val(pte));
2048 local_irq_restore(flags);
2049}
2050
2051extern void sparc_context_init(int);
2052extern unsigned long end;
2053extern unsigned long bootmem_init(unsigned long *pages_avail);
2054extern unsigned long last_valid_pfn;
2055
2056void __init sun4c_paging_init(void)
2057{
2058 int i, cnt;
2059 unsigned long kernel_end, vaddr;
2060 extern struct resource sparc_iomap;
2061 unsigned long end_pfn, pages_avail;
2062
2063 kernel_end = (unsigned long) &end;
1da177e4
LT		 2064 kernel_end = SUN4C_REAL_PGDIR_ALIGN(kernel_end);
2065
2066 pages_avail = 0;
2067 last_valid_pfn = bootmem_init(&pages_avail);
2068 end_pfn = last_valid_pfn;
2069
2070 sun4c_probe_mmu();
2071 invalid_segment = (num_segmaps - 1);
2072 sun4c_init_mmu_entry_pool();
2073 sun4c_init_rings();
2074 sun4c_init_map_kernelprom(kernel_end);
2075 sun4c_init_clean_mmu(kernel_end);
2076 sun4c_init_fill_kernel_ring(SUN4C_KERNEL_BUCKETS);
2077 sun4c_init_lock_area(sparc_iomap.start, IOBASE_END);
2078 sun4c_init_lock_area(DVMA_VADDR, DVMA_END);
2079 sun4c_init_lock_areas();
2080 sun4c_init_fill_user_ring();
2081
2082 sun4c_set_context(0);
2083 memset(swapper_pg_dir, 0, PAGE_SIZE);
2084 memset(pg0, 0, PAGE_SIZE);
2085 memset(pg1, 0, PAGE_SIZE);
2086 memset(pg2, 0, PAGE_SIZE);
2087 memset(pg3, 0, PAGE_SIZE);
2088
2089 /* Save work later. */
2090 vaddr = VMALLOC_START;
2091 swapper_pg_dir[vaddr>>SUN4C_PGDIR_SHIFT] = __pgd(PGD_TABLE | (unsigned long) pg0);
2092 vaddr += SUN4C_PGDIR_SIZE;
2093 swapper_pg_dir[vaddr>>SUN4C_PGDIR_SHIFT] = __pgd(PGD_TABLE | (unsigned long) pg1);
2094 vaddr += SUN4C_PGDIR_SIZE;
2095 swapper_pg_dir[vaddr>>SUN4C_PGDIR_SHIFT] = __pgd(PGD_TABLE | (unsigned long) pg2);
2096 vaddr += SUN4C_PGDIR_SIZE;
2097 swapper_pg_dir[vaddr>>SUN4C_PGDIR_SHIFT] = __pgd(PGD_TABLE | (unsigned long) pg3);
2098 sun4c_init_ss2_cache_bug();
2099 sparc_context_init(num_contexts);
2100
2101 {
2102 unsigned long zones_size[MAX_NR_ZONES];
2103 unsigned long zholes_size[MAX_NR_ZONES];
2104 unsigned long npages;
2105 int znum;
2106
2107 for (znum = 0; znum < MAX_NR_ZONES; znum++)
2108 zones_size[znum] = zholes_size[znum] = 0;
2109
2110 npages = max_low_pfn - pfn_base;
2111
2112 zones_size[ZONE_DMA] = npages;
2113 zholes_size[ZONE_DMA] = npages - pages_avail;
2114
2115 npages = highend_pfn - max_low_pfn;
2116 zones_size[ZONE_HIGHMEM] = npages;
2117 zholes_size[ZONE_HIGHMEM] = npages - calc_highpages();
2118
9109fb7b 2119 free_area_init_node(0, zones_size, pfn_base, zholes_size);
1da177e4
LT		 2120 }
2121
2122 cnt = 0;
2123 for (i = 0; i < num_segmaps; i++)
2124 if (mmu_entry_pool[i].locked)
2125 cnt++;
2126
2127 max_user_taken_entries = num_segmaps - cnt - 40 - 1;
2128
2129 printk("SUN4C: %d mmu entries for the kernel\n", cnt);
2130}
2131
14778d90
DM		 2132static pgprot_t sun4c_pgprot_noncached(pgprot_t prot)
2133{
2134 prot |= __pgprot(_SUN4C_PAGE_IO | _SUN4C_PAGE_NOCACHE);
2135
2136 return prot;
2137}
2138
1da177e4
LT		 2139/* Load up routines and constants for sun4c mmu */
2140void __init ld_mmu_sun4c(void)
2141{
2142 extern void ___xchg32_sun4c(void);
2143
2144 printk("Loading sun4c MMU routines\n");
2145
2146 /* First the constants */
2147 BTFIXUPSET_SIMM13(pgdir_shift, SUN4C_PGDIR_SHIFT);
2148 BTFIXUPSET_SETHI(pgdir_size, SUN4C_PGDIR_SIZE);
2149 BTFIXUPSET_SETHI(pgdir_mask, SUN4C_PGDIR_MASK);
2150
2151 BTFIXUPSET_SIMM13(ptrs_per_pmd, SUN4C_PTRS_PER_PMD);
2152 BTFIXUPSET_SIMM13(ptrs_per_pgd, SUN4C_PTRS_PER_PGD);
2153 BTFIXUPSET_SIMM13(user_ptrs_per_pgd, KERNBASE / SUN4C_PGDIR_SIZE);
2154
2155 BTFIXUPSET_INT(page_none, pgprot_val(SUN4C_PAGE_NONE));
378e515c 2156 PAGE_SHARED = pgprot_val(SUN4C_PAGE_SHARED);
1da177e4
LT		 2157 BTFIXUPSET_INT(page_copy, pgprot_val(SUN4C_PAGE_COPY));
2158 BTFIXUPSET_INT(page_readonly, pgprot_val(SUN4C_PAGE_READONLY));
2159 BTFIXUPSET_INT(page_kernel, pgprot_val(SUN4C_PAGE_KERNEL));
2160 page_kernel = pgprot_val(SUN4C_PAGE_KERNEL);
1da177e4
LT		 2161
2162 /* Functions */
14778d90 2163 BTFIXUPSET_CALL(pgprot_noncached, sun4c_pgprot_noncached, BTFIXUPCALL_NORM);
1da177e4
LT		 2164 BTFIXUPSET_CALL(___xchg32, ___xchg32_sun4c, BTFIXUPCALL_NORM);
2165 BTFIXUPSET_CALL(do_check_pgt_cache, sun4c_check_pgt_cache, BTFIXUPCALL_NORM);
2166
2167 BTFIXUPSET_CALL(flush_cache_all, sun4c_flush_cache_all, BTFIXUPCALL_NORM);
2168
2169 if (sun4c_vacinfo.do_hwflushes) {
2170 BTFIXUPSET_CALL(sun4c_flush_page, sun4c_flush_page_hw, BTFIXUPCALL_NORM);
2171 BTFIXUPSET_CALL(sun4c_flush_segment, sun4c_flush_segment_hw, BTFIXUPCALL_NORM);
2172 BTFIXUPSET_CALL(sun4c_flush_context, sun4c_flush_context_hw, BTFIXUPCALL_NORM);
2173 } else {
2174 BTFIXUPSET_CALL(sun4c_flush_page, sun4c_flush_page_sw, BTFIXUPCALL_NORM);
2175 BTFIXUPSET_CALL(sun4c_flush_segment, sun4c_flush_segment_sw, BTFIXUPCALL_NORM);
2176 BTFIXUPSET_CALL(sun4c_flush_context, sun4c_flush_context_sw, BTFIXUPCALL_NORM);
2177 }
2178
2179 BTFIXUPSET_CALL(flush_tlb_mm, sun4c_flush_tlb_mm, BTFIXUPCALL_NORM);
2180 BTFIXUPSET_CALL(flush_cache_mm, sun4c_flush_cache_mm, BTFIXUPCALL_NORM);
2181 BTFIXUPSET_CALL(destroy_context, sun4c_destroy_context, BTFIXUPCALL_NORM);
2182 BTFIXUPSET_CALL(switch_mm, sun4c_switch_mm, BTFIXUPCALL_NORM);
2183 BTFIXUPSET_CALL(flush_cache_page, sun4c_flush_cache_page, BTFIXUPCALL_NORM);
2184 BTFIXUPSET_CALL(flush_tlb_page, sun4c_flush_tlb_page, BTFIXUPCALL_NORM);
2185 BTFIXUPSET_CALL(flush_tlb_range, sun4c_flush_tlb_range, BTFIXUPCALL_NORM);
2186 BTFIXUPSET_CALL(flush_cache_range, sun4c_flush_cache_range, BTFIXUPCALL_NORM);
2187 BTFIXUPSET_CALL(__flush_page_to_ram, sun4c_flush_page_to_ram, BTFIXUPCALL_NORM);
2188 BTFIXUPSET_CALL(flush_tlb_all, sun4c_flush_tlb_all, BTFIXUPCALL_NORM);
2189
2190 BTFIXUPSET_CALL(flush_sig_insns, sun4c_flush_sig_insns, BTFIXUPCALL_NOP);
2191
2192 BTFIXUPSET_CALL(set_pte, sun4c_set_pte, BTFIXUPCALL_STO1O0);
2193
2194 /* The 2.4.18 code does not set this on sun4c, how does it work? XXX */
2195 /* BTFIXUPSET_SETHI(none_mask, 0x00000000); */ /* Defaults to zero? */
2196
2197 BTFIXUPSET_CALL(pte_pfn, sun4c_pte_pfn, BTFIXUPCALL_NORM);
2198#if 0 /* PAGE_SHIFT <= 12 */ /* Eek. Investigate. XXX */
2199 BTFIXUPSET_CALL(pmd_page, sun4c_pmd_page, BTFIXUPCALL_ANDNINT(PAGE_SIZE - 1));
2200#else
2201 BTFIXUPSET_CALL(pmd_page, sun4c_pmd_page, BTFIXUPCALL_NORM);
2202#endif
2203 BTFIXUPSET_CALL(pmd_set, sun4c_pmd_set, BTFIXUPCALL_NORM);
2204 BTFIXUPSET_CALL(pmd_populate, sun4c_pmd_populate, BTFIXUPCALL_NORM);
2205
2206 BTFIXUPSET_CALL(pte_present, sun4c_pte_present, BTFIXUPCALL_NORM);
2207 BTFIXUPSET_CALL(pte_clear, sun4c_pte_clear, BTFIXUPCALL_STG0O0);
1da177e4
LT		 2208
2209 BTFIXUPSET_CALL(pmd_bad, sun4c_pmd_bad, BTFIXUPCALL_NORM);
2210 BTFIXUPSET_CALL(pmd_present, sun4c_pmd_present, BTFIXUPCALL_NORM);
2211 BTFIXUPSET_CALL(pmd_clear, sun4c_pmd_clear, BTFIXUPCALL_STG0O0);
2212
2213 BTFIXUPSET_CALL(pgd_none, sun4c_pgd_none, BTFIXUPCALL_RETINT(0));
2214 BTFIXUPSET_CALL(pgd_bad, sun4c_pgd_bad, BTFIXUPCALL_RETINT(0));
2215 BTFIXUPSET_CALL(pgd_present, sun4c_pgd_present, BTFIXUPCALL_RETINT(1));
2216 BTFIXUPSET_CALL(pgd_clear, sun4c_pgd_clear, BTFIXUPCALL_NOP);
2217
2218 BTFIXUPSET_CALL(mk_pte, sun4c_mk_pte, BTFIXUPCALL_NORM);
2219 BTFIXUPSET_CALL(mk_pte_phys, sun4c_mk_pte_phys, BTFIXUPCALL_NORM);
2220 BTFIXUPSET_CALL(mk_pte_io, sun4c_mk_pte_io, BTFIXUPCALL_NORM);
2221
2222 BTFIXUPSET_INT(pte_modify_mask, _SUN4C_PAGE_CHG_MASK);
2223 BTFIXUPSET_CALL(pmd_offset, sun4c_pmd_offset, BTFIXUPCALL_NORM);
2224 BTFIXUPSET_CALL(pte_offset_kernel, sun4c_pte_offset_kernel, BTFIXUPCALL_NORM);
2225 BTFIXUPSET_CALL(free_pte_fast, sun4c_free_pte_fast, BTFIXUPCALL_NORM);
2226 BTFIXUPSET_CALL(pte_free, sun4c_pte_free, BTFIXUPCALL_NORM);
2227 BTFIXUPSET_CALL(pte_alloc_one_kernel, sun4c_pte_alloc_one_kernel, BTFIXUPCALL_NORM);
2228 BTFIXUPSET_CALL(pte_alloc_one, sun4c_pte_alloc_one, BTFIXUPCALL_NORM);
2229 BTFIXUPSET_CALL(free_pmd_fast, sun4c_free_pmd_fast, BTFIXUPCALL_NOP);
2230 BTFIXUPSET_CALL(pmd_alloc_one, sun4c_pmd_alloc_one, BTFIXUPCALL_RETO0);
2231 BTFIXUPSET_CALL(free_pgd_fast, sun4c_free_pgd_fast, BTFIXUPCALL_NORM);
2232 BTFIXUPSET_CALL(get_pgd_fast, sun4c_get_pgd_fast, BTFIXUPCALL_NORM);
2233
2234 BTFIXUPSET_HALF(pte_writei, _SUN4C_PAGE_WRITE);
2235 BTFIXUPSET_HALF(pte_dirtyi, _SUN4C_PAGE_MODIFIED);
2236 BTFIXUPSET_HALF(pte_youngi, _SUN4C_PAGE_ACCESSED);
2237 BTFIXUPSET_HALF(pte_filei, _SUN4C_PAGE_FILE);
2238 BTFIXUPSET_HALF(pte_wrprotecti, _SUN4C_PAGE_WRITE|_SUN4C_PAGE_SILENT_WRITE);
2239 BTFIXUPSET_HALF(pte_mkcleani, _SUN4C_PAGE_MODIFIED|_SUN4C_PAGE_SILENT_WRITE);
2240 BTFIXUPSET_HALF(pte_mkoldi, _SUN4C_PAGE_ACCESSED|_SUN4C_PAGE_SILENT_READ);
2241 BTFIXUPSET_CALL(pte_mkwrite, sun4c_pte_mkwrite, BTFIXUPCALL_NORM);
2242 BTFIXUPSET_CALL(pte_mkdirty, sun4c_pte_mkdirty, BTFIXUPCALL_NORM);
2243 BTFIXUPSET_CALL(pte_mkyoung, sun4c_pte_mkyoung, BTFIXUPCALL_NORM);
2244 BTFIXUPSET_CALL(update_mmu_cache, sun4c_update_mmu_cache, BTFIXUPCALL_NORM);
2245
2246 BTFIXUPSET_CALL(pte_to_pgoff, sun4c_pte_to_pgoff, BTFIXUPCALL_NORM);
2247 BTFIXUPSET_CALL(pgoff_to_pte, sun4c_pgoff_to_pte, BTFIXUPCALL_NORM);
2248
2249 BTFIXUPSET_CALL(mmu_lockarea, sun4c_lockarea, BTFIXUPCALL_NORM);
2250 BTFIXUPSET_CALL(mmu_unlockarea, sun4c_unlockarea, BTFIXUPCALL_NORM);
2251
2252 BTFIXUPSET_CALL(mmu_get_scsi_one, sun4c_get_scsi_one, BTFIXUPCALL_NORM);
2253 BTFIXUPSET_CALL(mmu_get_scsi_sgl, sun4c_get_scsi_sgl, BTFIXUPCALL_NORM);
2254 BTFIXUPSET_CALL(mmu_release_scsi_one, sun4c_release_scsi_one, BTFIXUPCALL_NORM);
2255 BTFIXUPSET_CALL(mmu_release_scsi_sgl, sun4c_release_scsi_sgl, BTFIXUPCALL_NORM);
2256
2257 BTFIXUPSET_CALL(mmu_map_dma_area, sun4c_map_dma_area, BTFIXUPCALL_NORM);
2258 BTFIXUPSET_CALL(mmu_unmap_dma_area, sun4c_unmap_dma_area, BTFIXUPCALL_NORM);
1da177e4
LT		 2259
2260 BTFIXUPSET_CALL(sparc_mapiorange, sun4c_mapiorange, BTFIXUPCALL_NORM);
2261 BTFIXUPSET_CALL(sparc_unmapiorange, sun4c_unmapiorange, BTFIXUPCALL_NORM);
2262
2263 BTFIXUPSET_CALL(__swp_type, sun4c_swp_type, BTFIXUPCALL_NORM);
2264 BTFIXUPSET_CALL(__swp_offset, sun4c_swp_offset, BTFIXUPCALL_NORM);
2265 BTFIXUPSET_CALL(__swp_entry, sun4c_swp_entry, BTFIXUPCALL_NORM);
2266
2267 BTFIXUPSET_CALL(alloc_thread_info, sun4c_alloc_thread_info, BTFIXUPCALL_NORM);
2268 BTFIXUPSET_CALL(free_thread_info, sun4c_free_thread_info, BTFIXUPCALL_NORM);
2269
2270 BTFIXUPSET_CALL(mmu_info, sun4c_mmu_info, BTFIXUPCALL_NORM);
2271
2272 /* These should _never_ get called with two level tables. */
2273 BTFIXUPSET_CALL(pgd_set, sun4c_pgd_set, BTFIXUPCALL_NOP);
46a82b2d 2274 BTFIXUPSET_CALL(pgd_page_vaddr, sun4c_pgd_page, BTFIXUPCALL_RETO0);
1da177e4 2275}
Linux 6.x block layer and io_uring tree(s)