Annotation of sys/arch/arm/xscale/i80321_space.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: i80321_space.c,v 1.4 2006/06/01 03:46:01 drahn Exp $ */
2: /* $NetBSD: i80321_space.c,v 1.9 2005/11/24 13:08:32 yamt Exp $ */
3:
4: /*
5: * Copyright (c) 2001, 2002 Wasabi Systems, Inc.
6: * All rights reserved.
7: *
8: * Written by Jason R. Thorpe for Wasabi Systems, Inc.
9: *
10: * Redistribution and use in source and binary forms, with or without
11: * modification, are permitted provided that the following conditions
12: * are met:
13: * 1. Redistributions of source code must retain the above copyright
14: * notice, this list of conditions and the following disclaimer.
15: * 2. Redistributions in binary form must reproduce the above copyright
16: * notice, this list of conditions and the following disclaimer in the
17: * documentation and/or other materials provided with the distribution.
18: * 3. All advertising materials mentioning features or use of this software
19: * must display the following acknowledgement:
20: * This product includes software developed for the NetBSD Project by
21: * Wasabi Systems, Inc.
22: * 4. The name of Wasabi Systems, Inc. may not be used to endorse
23: * or promote products derived from this software without specific prior
24: * written permission.
25: *
26: * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
27: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
30: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36: * POSSIBILITY OF SUCH DAMAGE.
37: */
38:
39: /*
40: * bus_space functions for i80321 I/O Processor.
41: */
42:
43: #include <sys/param.h>
44: #include <sys/systm.h>
45:
46: #include <uvm/uvm_extern.h>
47:
48: #include <machine/bus.h>
49:
50: #include <arm/xscale/i80321reg.h>
51: #include <arm/xscale/i80321var.h>
52:
53: /* Prototypes for all the bus_space structure functions */
54: bs_protos(i80321);
55: bs_protos(i80321_io);
56: bs_protos(i80321_mem);
57: bs_protos(generic);
58: bs_protos(generic_armv4);
59: bs_protos(bs_notimpl);
60:
61: /*
62: * Template bus_space -- copied, and the bits that are NULL are
63: * filled in.
64: */
65: const struct bus_space i80321_bs_tag_template = {
66: /* cookie */
67: (void *) 0,
68:
69: /* mapping/unmapping */
70: i80321_bs_map,
71: i80321_bs_unmap,
72: i80321_bs_subregion,
73:
74: /* allocation/deallocation */
75: NULL,
76: NULL,
77:
78: /* get kernel virtual address */
79: i80321_bs_vaddr,
80:
81: /* mmap */
82: i80321_bs_mmap,
83:
84: /* barrier */
85: i80321_bs_barrier,
86:
87: /* read (single) */
88: generic_bs_r_1,
89: generic_armv4_bs_r_2,
90: generic_bs_r_4,
91: bs_notimpl_bs_r_8,
92:
93: /* read multiple */
94: generic_bs_rm_1,
95: generic_armv4_bs_rm_2,
96: generic_bs_rm_4,
97: bs_notimpl_bs_rm_8,
98:
99: /* read region */
100: generic_bs_rr_1,
101: generic_armv4_bs_rr_2,
102: generic_bs_rr_4,
103: bs_notimpl_bs_rr_8,
104:
105: /* write (single) */
106: generic_bs_w_1,
107: generic_armv4_bs_w_2,
108: generic_bs_w_4,
109: bs_notimpl_bs_w_8,
110:
111: /* write multiple */
112: generic_bs_wm_1,
113: generic_armv4_bs_wm_2,
114: generic_bs_wm_4,
115: bs_notimpl_bs_wm_8,
116:
117: /* write region */
118: generic_bs_wr_1,
119: generic_armv4_bs_wr_2,
120: generic_bs_wr_4,
121: bs_notimpl_bs_wr_8,
122:
123: /* set multiple */
124: bs_notimpl_bs_sm_1,
125: bs_notimpl_bs_sm_2,
126: bs_notimpl_bs_sm_4,
127: bs_notimpl_bs_sm_8,
128:
129: /* set region */
130: bs_notimpl_bs_sr_1,
131: generic_armv4_bs_sr_2,
132: generic_bs_sr_4,
133: bs_notimpl_bs_sr_8,
134:
135: /* copy */
136: bs_notimpl_bs_c_1,
137: generic_armv4_bs_c_2,
138: bs_notimpl_bs_c_4,
139: bs_notimpl_bs_c_8,
140: };
141:
142: void
143: i80321_bs_init(bus_space_tag_t bs, void *cookie)
144: {
145:
146: *bs = i80321_bs_tag_template;
147: bs->bs_cookie = cookie;
148: }
149:
150: void
151: i80321_io_bs_init(bus_space_tag_t bs, void *cookie)
152: {
153:
154: *bs = i80321_bs_tag_template;
155: bs->bs_cookie = cookie;
156:
157: bs->bs_map = i80321_io_bs_map;
158: bs->bs_unmap = i80321_io_bs_unmap;
159: bs->bs_alloc = i80321_io_bs_alloc;
160: bs->bs_free = i80321_io_bs_free;
161:
162: bs->bs_vaddr = i80321_io_bs_vaddr;
163: }
164:
165: void
166: i80321_mem_bs_init(bus_space_tag_t bs, void *cookie)
167: {
168:
169: *bs = i80321_bs_tag_template;
170: bs->bs_cookie = cookie;
171:
172: bs->bs_map = i80321_mem_bs_map;
173: bs->bs_unmap = i80321_mem_bs_unmap;
174: bs->bs_alloc = i80321_mem_bs_alloc;
175: bs->bs_free = i80321_mem_bs_free;
176:
177: bs->bs_mmap = i80321_mem_bs_mmap;
178: }
179:
180: int
181: i80321_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flag,
182: bus_space_handle_t *bshp)
183: {
184: const struct pmap_devmap *pd;
185: paddr_t startpa, endpa, pa, pagecnt;
186: vaddr_t va;
187: pt_entry_t *pte;
188:
189: if ((pd = pmap_devmap_find_pa(bpa, size)) != NULL) {
190: /* Device was statically mapped. */
191: *bshp = pd->pd_va + (bpa - pd->pd_pa);
192: return (0);
193: }
194:
195: #if 0
196: printf("i80321_bs_map bpa %x, size %x flag %x\n", bpa, size, flag);
197: #endif
198: endpa = round_page(bpa + size);
199: startpa = trunc_page(bpa);
200: pagecnt = endpa - startpa;
201:
202: va = uvm_km_valloc(kernel_map, endpa - startpa);
203: if (va == 0)
204: return(ENOMEM);
205: #if 0
206: printf("i80321_bs_map va %x pa %x, endpa %x, sz %x\n", va, startpa,
207: endpa, endpa-startpa);
208: #endif
209:
210: *bshp = (bus_space_handle_t)(va + (bpa - startpa));
211:
212: for (pa = startpa; pagecnt > 0;
213: pa += PAGE_SIZE, va += PAGE_SIZE, pagecnt -= PAGE_SIZE) {
214: pmap_kenter_pa(va, pa, VM_PROT_READ | VM_PROT_WRITE);
215: if ((flag & BUS_SPACE_MAP_CACHEABLE) == 0) {
216: pte = vtopte(va);
217: *pte &= ~L2_S_CACHE_MASK;
218: PTE_SYNC(pte);
219: }
220: }
221: pmap_update(pmap_kernel());
222:
223: return (0);
224: }
225:
226: void
227: i80321_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size)
228: {
229: vaddr_t va, endva;
230:
231: if (pmap_devmap_find_va(bsh, size) != NULL) {
232: /* Device was statically mapped; nothing to do. */
233: return;
234: }
235:
236: endva = round_page(bsh + size);
237: va = trunc_page(bsh);
238:
239: pmap_kremove(va, endva - va);
240: uvm_km_free(kernel_map, va, endva - va);
241: }
242:
243:
244: /* *** Routines shared by i80321, PCI IO, and PCI MEM. *** */
245:
246: int
247: i80321_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset,
248: bus_size_t size, bus_space_handle_t *nbshp)
249: {
250: *nbshp = bsh + offset;
251: return (0);
252: }
253:
254: void
255: i80321_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset,
256: bus_size_t len, int flags)
257: {
258:
259: /* Nothing to do. */
260: }
261:
262: void *
263: i80321_bs_vaddr(void *t, bus_space_handle_t bsh)
264: {
265:
266: return ((void *)bsh);
267: }
268:
269: paddr_t
270: i80321_bs_mmap(void *t, bus_addr_t addr, off_t off, int prot, int flags)
271: {
272:
273: /* Not supported. */
274: return (-1);
275: }
276:
277: /* *** Routines for PCI IO. *** */
278:
279: int
280: i80321_io_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flags,
281: bus_space_handle_t *bshp)
282: {
283: struct i80321_softc *sc = t;
284: uint32_t busbase;
285:
286: if (bpa >= sc->sc_ioout_xlate &&
287: bpa < (sc->sc_ioout_xlate + VERDE_OUT_XLATE_IO_WIN_SIZE)) {
288: busbase = sc->sc_ioout_xlate;
289: } else
290: return (EINVAL);
291:
292: if ((bpa + size) >= (busbase + VERDE_OUT_XLATE_IO_WIN_SIZE))
293: return (EINVAL);
294:
295: /*
296: * Found the window -- PCI I/O space is mapped at a fixed
297: * virtual address by board-specific code. Translate the
298: * bus address to the virtual address.
299: */
300: bus_space_subregion(sc->sc_st, sc->sc_io_sh, (bpa - busbase), size,
301: bshp);
302: return (0);
303: }
304:
305: void
306: i80321_io_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size)
307: {
308:
309: /* Nothing to do. */
310: }
311:
312: int
313: i80321_io_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend,
314: bus_size_t size, bus_size_t alignment, bus_size_t boundary, int flags,
315: bus_addr_t *bpap, bus_space_handle_t *bshp)
316: {
317:
318: panic("i80321_io_bs_alloc(): not implemented");
319: }
320:
321: void
322: i80321_io_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size)
323: {
324:
325: panic("i80321_io_bs_free(): not implemented");
326: }
327:
328: void *
329: i80321_io_bs_vaddr(void *t, bus_space_handle_t bsh)
330: {
331:
332: /* Not supported. */
333: return (NULL);
334: }
335:
336: /* *** Routines for PCI MEM. *** */
337:
338: int
339: i80321_mem_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flag,
340: bus_space_handle_t *bshp)
341: {
342:
343: struct i80321_softc *sc = t;
344: vaddr_t va;
345: uint32_t busbase;
346: paddr_t pa, endpa, physbase;
347: pt_entry_t *pte;
348:
349: #if 0
350: printf("i80321_bs_map bpa %x, size %x flag %x : %x %x \n", bpa, size, flag,
351: sc->sc_owin[0].owin_xlate_lo,
352: sc->sc_owin[0].owin_xlate_lo+ VERDE_OUT_XLATE_MEM_WIN_SIZE);
353: #endif
354:
355: if (bpa >= sc->sc_owin[0].owin_xlate_lo &&
356: bpa < (sc->sc_owin[0].owin_xlate_lo +
357: VERDE_OUT_XLATE_MEM_WIN_SIZE)) {
358: busbase = sc->sc_iwin[1].iwin_xlate;
359: physbase = sc->sc_owin[0].owin_xlate_lo;
360: } else
361: return (EINVAL);
362:
363: if ((bpa + size) >= ( sc->sc_owin[0].owin_xlate_lo +
364: VERDE_OUT_XLATE_MEM_WIN_SIZE))
365: return (EINVAL);
366:
367: /*
368: * Found the window -- PCI MEM space is now mapped by allocating
369: * some kernel VA space and mapping the pages with pmap_enter().
370: * pmap_enter() will map unmanaged pages as non-cacheable.
371: */
372: pa = trunc_page((bpa - busbase) + physbase);
373: endpa = round_page(((bpa - busbase) + physbase) + size);
374:
375: va = uvm_km_valloc(kernel_map, endpa - pa);
376: if (va == 0)
377: return (ENOMEM);
378: //printf("i80321_mem_bs_map bpa %x pa %x va %x sz %x\n", bpa, pa, va, endpa-pa);
379:
380: #if 0
381: printf("i80321_bs_map va %x pa %x, endpa %x, sz %x\n", va, pa,
382: endpa, endpa-pa);
383: #endif
384:
385: *bshp = va + (bpa & PAGE_MASK);
386:
387: for (; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) {
388: pmap_kenter_pa(va, pa, VM_PROT_READ | VM_PROT_WRITE);
389: if ((flag & BUS_SPACE_MAP_CACHEABLE) == 0) {
390: pte = vtopte(va);
391: *pte &= ~L2_S_CACHE_MASK;
392: PTE_SYNC(pte);
393: }
394: }
395: pmap_update(pmap_kernel());
396:
397: return (0);
398: }
399:
400: void
401: i80321_mem_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size)
402: {
403: vaddr_t va, endva;
404:
405: va = trunc_page(bsh);
406: endva = round_page(bsh + size);
407:
408: pmap_kremove(va, endva - va);
409: pmap_update(pmap_kernel());
410:
411: /* Free the kernel virtual mapping. */
412: uvm_km_free(kernel_map, va, endva - va);
413: }
414:
415: int
416: i80321_mem_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend,
417: bus_size_t size, bus_size_t alignment, bus_size_t boundary, int flags,
418: bus_addr_t *bpap, bus_space_handle_t *bshp)
419: {
420:
421: panic("i80321_mem_bs_alloc(): not implemented");
422: }
423:
424: void
425: i80321_mem_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size)
426: {
427:
428: panic("i80321_mem_bs_free(): not implemented");
429: }
430:
431: paddr_t
432: i80321_mem_bs_mmap(void *t, bus_addr_t addr, off_t off, int prot, int flags)
433: {
434:
435: /* XXX */
436: return (-1);
437: }
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