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/arch/powerpc/include/asm/fsl_hcalls.h

https://github.com/aicjofs/android_kernel_lge_v500_20d
C Header | 655 lines | 357 code | 90 blank | 208 comment | 0 complexity | 55648cdbf886c93f81ac49c008e1269d MD5 | raw file
  1/*
  2 * Freescale hypervisor call interface
  3 *
  4 * Copyright 2008-2010 Freescale Semiconductor, Inc.
  5 *
  6 * Author: Timur Tabi <timur@freescale.com>
  7 *
  8 * This file is provided under a dual BSD/GPL license.  When using or
  9 * redistributing this file, you may do so under either license.
 10 *
 11 * Redistribution and use in source and binary forms, with or without
 12 * modification, are permitted provided that the following conditions are met:
 13 *     * Redistributions of source code must retain the above copyright
 14 *       notice, this list of conditions and the following disclaimer.
 15 *     * 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 *     * Neither the name of Freescale Semiconductor nor the
 19 *       names of its contributors may be used to endorse or promote products
 20 *       derived from this software without specific prior written permission.
 21 *
 22 *
 23 * ALTERNATIVELY, this software may be distributed under the terms of the
 24 * GNU General Public License ("GPL") as published by the Free Software
 25 * Foundation, either version 2 of that License or (at your option) any
 26 * later version.
 27 *
 28 * THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
 29 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 30 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 31 * DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
 32 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 33 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 34 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 35 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 36 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 37 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 38 */
 39
 40#ifndef _FSL_HCALLS_H
 41#define _FSL_HCALLS_H
 42
 43#include <linux/types.h>
 44#include <linux/errno.h>
 45#include <asm/byteorder.h>
 46#include <asm/epapr_hcalls.h>
 47
 48#define FH_API_VERSION			1
 49
 50#define FH_ERR_GET_INFO			1
 51#define FH_PARTITION_GET_DTPROP		2
 52#define FH_PARTITION_SET_DTPROP		3
 53#define FH_PARTITION_RESTART		4
 54#define FH_PARTITION_GET_STATUS		5
 55#define FH_PARTITION_START		6
 56#define FH_PARTITION_STOP		7
 57#define FH_PARTITION_MEMCPY		8
 58#define FH_DMA_ENABLE			9
 59#define FH_DMA_DISABLE			10
 60#define FH_SEND_NMI			11
 61#define FH_VMPIC_GET_MSIR		12
 62#define FH_SYSTEM_RESET			13
 63#define FH_GET_CORE_STATE		14
 64#define FH_ENTER_NAP			15
 65#define FH_EXIT_NAP			16
 66#define FH_CLAIM_DEVICE			17
 67#define FH_PARTITION_STOP_DMA		18
 68
 69/* vendor ID: Freescale Semiconductor */
 70#define FH_HCALL_TOKEN(num)		_EV_HCALL_TOKEN(EV_FSL_VENDOR_ID, num)
 71
 72/*
 73 * We use "uintptr_t" to define a register because it's guaranteed to be a
 74 * 32-bit integer on a 32-bit platform, and a 64-bit integer on a 64-bit
 75 * platform.
 76 *
 77 * All registers are either input/output or output only.  Registers that are
 78 * initialized before making the hypercall are input/output.  All
 79 * input/output registers are represented with "+r".  Output-only registers
 80 * are represented with "=r".  Do not specify any unused registers.  The
 81 * clobber list will tell the compiler that the hypercall modifies those
 82 * registers, which is good enough.
 83 */
 84
 85/**
 86 * fh_send_nmi - send NMI to virtual cpu(s).
 87 * @vcpu_mask: send NMI to virtual cpu(s) specified by this mask.
 88 *
 89 * Returns 0 for success, or EINVAL for invalid vcpu_mask.
 90 */
 91static inline unsigned int fh_send_nmi(unsigned int vcpu_mask)
 92{
 93	register uintptr_t r11 __asm__("r11");
 94	register uintptr_t r3 __asm__("r3");
 95
 96	r11 = FH_HCALL_TOKEN(FH_SEND_NMI);
 97	r3 = vcpu_mask;
 98
 99	__asm__ __volatile__ ("sc 1"
100		: "+r" (r11), "+r" (r3)
101		: : EV_HCALL_CLOBBERS1
102	);
103
104	return r3;
105}
106
107/* Arbitrary limits to avoid excessive memory allocation in hypervisor */
108#define FH_DTPROP_MAX_PATHLEN 4096
109#define FH_DTPROP_MAX_PROPLEN 32768
110
111/**
112 * fh_partiton_get_dtprop - get a property from a guest device tree.
113 * @handle: handle of partition whose device tree is to be accessed
114 * @dtpath_addr: physical address of device tree path to access
115 * @propname_addr: physical address of name of property
116 * @propvalue_addr: physical address of property value buffer
117 * @propvalue_len: length of buffer on entry, length of property on return
118 *
119 * Returns zero on success, non-zero on error.
120 */
121static inline unsigned int fh_partition_get_dtprop(int handle,
122						   uint64_t dtpath_addr,
123						   uint64_t propname_addr,
124						   uint64_t propvalue_addr,
125						   uint32_t *propvalue_len)
126{
127	register uintptr_t r11 __asm__("r11");
128	register uintptr_t r3 __asm__("r3");
129	register uintptr_t r4 __asm__("r4");
130	register uintptr_t r5 __asm__("r5");
131	register uintptr_t r6 __asm__("r6");
132	register uintptr_t r7 __asm__("r7");
133	register uintptr_t r8 __asm__("r8");
134	register uintptr_t r9 __asm__("r9");
135	register uintptr_t r10 __asm__("r10");
136
137	r11 = FH_HCALL_TOKEN(FH_PARTITION_GET_DTPROP);
138	r3 = handle;
139
140#ifdef CONFIG_PHYS_64BIT
141	r4 = dtpath_addr >> 32;
142	r6 = propname_addr >> 32;
143	r8 = propvalue_addr >> 32;
144#else
145	r4 = 0;
146	r6 = 0;
147	r8 = 0;
148#endif
149	r5 = (uint32_t)dtpath_addr;
150	r7 = (uint32_t)propname_addr;
151	r9 = (uint32_t)propvalue_addr;
152	r10 = *propvalue_len;
153
154	__asm__ __volatile__ ("sc 1"
155		: "+r" (r11),
156		  "+r" (r3), "+r" (r4), "+r" (r5), "+r" (r6), "+r" (r7),
157		  "+r" (r8), "+r" (r9), "+r" (r10)
158		: : EV_HCALL_CLOBBERS8
159	);
160
161	*propvalue_len = r4;
162	return r3;
163}
164
165/**
166 * Set a property in a guest device tree.
167 * @handle: handle of partition whose device tree is to be accessed
168 * @dtpath_addr: physical address of device tree path to access
169 * @propname_addr: physical address of name of property
170 * @propvalue_addr: physical address of property value
171 * @propvalue_len: length of property
172 *
173 * Returns zero on success, non-zero on error.
174 */
175static inline unsigned int fh_partition_set_dtprop(int handle,
176						   uint64_t dtpath_addr,
177						   uint64_t propname_addr,
178						   uint64_t propvalue_addr,
179						   uint32_t propvalue_len)
180{
181	register uintptr_t r11 __asm__("r11");
182	register uintptr_t r3 __asm__("r3");
183	register uintptr_t r4 __asm__("r4");
184	register uintptr_t r6 __asm__("r6");
185	register uintptr_t r8 __asm__("r8");
186	register uintptr_t r5 __asm__("r5");
187	register uintptr_t r7 __asm__("r7");
188	register uintptr_t r9 __asm__("r9");
189	register uintptr_t r10 __asm__("r10");
190
191	r11 = FH_HCALL_TOKEN(FH_PARTITION_SET_DTPROP);
192	r3 = handle;
193
194#ifdef CONFIG_PHYS_64BIT
195	r4 = dtpath_addr >> 32;
196	r6 = propname_addr >> 32;
197	r8 = propvalue_addr >> 32;
198#else
199	r4 = 0;
200	r6 = 0;
201	r8 = 0;
202#endif
203	r5 = (uint32_t)dtpath_addr;
204	r7 = (uint32_t)propname_addr;
205	r9 = (uint32_t)propvalue_addr;
206	r10 = propvalue_len;
207
208	__asm__ __volatile__ ("sc 1"
209		: "+r" (r11),
210		  "+r" (r3), "+r" (r4), "+r" (r5), "+r" (r6), "+r" (r7),
211		  "+r" (r8), "+r" (r9), "+r" (r10)
212		: : EV_HCALL_CLOBBERS8
213	);
214
215	return r3;
216}
217
218/**
219 * fh_partition_restart - reboot the current partition
220 * @partition: partition ID
221 *
222 * Returns an error code if reboot failed.  Does not return if it succeeds.
223 */
224static inline unsigned int fh_partition_restart(unsigned int partition)
225{
226	register uintptr_t r11 __asm__("r11");
227	register uintptr_t r3 __asm__("r3");
228
229	r11 = FH_HCALL_TOKEN(FH_PARTITION_RESTART);
230	r3 = partition;
231
232	__asm__ __volatile__ ("sc 1"
233		: "+r" (r11), "+r" (r3)
234		: : EV_HCALL_CLOBBERS1
235	);
236
237	return r3;
238}
239
240#define FH_PARTITION_STOPPED	0
241#define FH_PARTITION_RUNNING	1
242#define FH_PARTITION_STARTING	2
243#define FH_PARTITION_STOPPING	3
244#define FH_PARTITION_PAUSING	4
245#define FH_PARTITION_PAUSED	5
246#define FH_PARTITION_RESUMING	6
247
248/**
249 * fh_partition_get_status - gets the status of a partition
250 * @partition: partition ID
251 * @status: returned status code
252 *
253 * Returns 0 for success, or an error code.
254 */
255static inline unsigned int fh_partition_get_status(unsigned int partition,
256	unsigned int *status)
257{
258	register uintptr_t r11 __asm__("r11");
259	register uintptr_t r3 __asm__("r3");
260	register uintptr_t r4 __asm__("r4");
261
262	r11 = FH_HCALL_TOKEN(FH_PARTITION_GET_STATUS);
263	r3 = partition;
264
265	__asm__ __volatile__ ("sc 1"
266		: "+r" (r11), "+r" (r3), "=r" (r4)
267		: : EV_HCALL_CLOBBERS2
268	);
269
270	*status = r4;
271
272	return r3;
273}
274
275/**
276 * fh_partition_start - boots and starts execution of the specified partition
277 * @partition: partition ID
278 * @entry_point: guest physical address to start execution
279 *
280 * The hypervisor creates a 1-to-1 virtual/physical IMA mapping, so at boot
281 * time, guest physical address are the same as guest virtual addresses.
282 *
283 * Returns 0 for success, or an error code.
284 */
285static inline unsigned int fh_partition_start(unsigned int partition,
286	uint32_t entry_point, int load)
287{
288	register uintptr_t r11 __asm__("r11");
289	register uintptr_t r3 __asm__("r3");
290	register uintptr_t r4 __asm__("r4");
291	register uintptr_t r5 __asm__("r5");
292
293	r11 = FH_HCALL_TOKEN(FH_PARTITION_START);
294	r3 = partition;
295	r4 = entry_point;
296	r5 = load;
297
298	__asm__ __volatile__ ("sc 1"
299		: "+r" (r11), "+r" (r3), "+r" (r4), "+r" (r5)
300		: : EV_HCALL_CLOBBERS3
301	);
302
303	return r3;
304}
305
306/**
307 * fh_partition_stop - stops another partition
308 * @partition: partition ID
309 *
310 * Returns 0 for success, or an error code.
311 */
312static inline unsigned int fh_partition_stop(unsigned int partition)
313{
314	register uintptr_t r11 __asm__("r11");
315	register uintptr_t r3 __asm__("r3");
316
317	r11 = FH_HCALL_TOKEN(FH_PARTITION_STOP);
318	r3 = partition;
319
320	__asm__ __volatile__ ("sc 1"
321		: "+r" (r11), "+r" (r3)
322		: : EV_HCALL_CLOBBERS1
323	);
324
325	return r3;
326}
327
328/**
329 * struct fh_sg_list: definition of the fh_partition_memcpy S/G list
330 * @source: guest physical address to copy from
331 * @target: guest physical address to copy to
332 * @size: number of bytes to copy
333 * @reserved: reserved, must be zero
334 *
335 * The scatter/gather list for fh_partition_memcpy() is an array of these
336 * structures.  The array must be guest physically contiguous.
337 *
338 * This structure must be aligned on 32-byte boundary, so that no single
339 * strucuture can span two pages.
340 */
341struct fh_sg_list {
342	uint64_t source;   /**< guest physical address to copy from */
343	uint64_t target;   /**< guest physical address to copy to */
344	uint64_t size;     /**< number of bytes to copy */
345	uint64_t reserved; /**< reserved, must be zero */
346} __attribute__ ((aligned(32)));
347
348/**
349 * fh_partition_memcpy - copies data from one guest to another
350 * @source: the ID of the partition to copy from
351 * @target: the ID of the partition to copy to
352 * @sg_list: guest physical address of an array of &fh_sg_list structures
353 * @count: the number of entries in @sg_list
354 *
355 * Returns 0 for success, or an error code.
356 */
357static inline unsigned int fh_partition_memcpy(unsigned int source,
358	unsigned int target, phys_addr_t sg_list, unsigned int count)
359{
360	register uintptr_t r11 __asm__("r11");
361	register uintptr_t r3 __asm__("r3");
362	register uintptr_t r4 __asm__("r4");
363	register uintptr_t r5 __asm__("r5");
364	register uintptr_t r6 __asm__("r6");
365	register uintptr_t r7 __asm__("r7");
366
367	r11 = FH_HCALL_TOKEN(FH_PARTITION_MEMCPY);
368	r3 = source;
369	r4 = target;
370	r5 = (uint32_t) sg_list;
371
372#ifdef CONFIG_PHYS_64BIT
373	r6 = sg_list >> 32;
374#else
375	r6 = 0;
376#endif
377	r7 = count;
378
379	__asm__ __volatile__ ("sc 1"
380		: "+r" (r11),
381		  "+r" (r3), "+r" (r4), "+r" (r5), "+r" (r6), "+r" (r7)
382		: : EV_HCALL_CLOBBERS5
383	);
384
385	return r3;
386}
387
388/**
389 * fh_dma_enable - enable DMA for the specified device
390 * @liodn: the LIODN of the I/O device for which to enable DMA
391 *
392 * Returns 0 for success, or an error code.
393 */
394static inline unsigned int fh_dma_enable(unsigned int liodn)
395{
396	register uintptr_t r11 __asm__("r11");
397	register uintptr_t r3 __asm__("r3");
398
399	r11 = FH_HCALL_TOKEN(FH_DMA_ENABLE);
400	r3 = liodn;
401
402	__asm__ __volatile__ ("sc 1"
403		: "+r" (r11), "+r" (r3)
404		: : EV_HCALL_CLOBBERS1
405	);
406
407	return r3;
408}
409
410/**
411 * fh_dma_disable - disable DMA for the specified device
412 * @liodn: the LIODN of the I/O device for which to disable DMA
413 *
414 * Returns 0 for success, or an error code.
415 */
416static inline unsigned int fh_dma_disable(unsigned int liodn)
417{
418	register uintptr_t r11 __asm__("r11");
419	register uintptr_t r3 __asm__("r3");
420
421	r11 = FH_HCALL_TOKEN(FH_DMA_DISABLE);
422	r3 = liodn;
423
424	__asm__ __volatile__ ("sc 1"
425		: "+r" (r11), "+r" (r3)
426		: : EV_HCALL_CLOBBERS1
427	);
428
429	return r3;
430}
431
432
433/**
434 * fh_vmpic_get_msir - returns the MPIC-MSI register value
435 * @interrupt: the interrupt number
436 * @msir_val: returned MPIC-MSI register value
437 *
438 * Returns 0 for success, or an error code.
439 */
440static inline unsigned int fh_vmpic_get_msir(unsigned int interrupt,
441	unsigned int *msir_val)
442{
443	register uintptr_t r11 __asm__("r11");
444	register uintptr_t r3 __asm__("r3");
445	register uintptr_t r4 __asm__("r4");
446
447	r11 = FH_HCALL_TOKEN(FH_VMPIC_GET_MSIR);
448	r3 = interrupt;
449
450	__asm__ __volatile__ ("sc 1"
451		: "+r" (r11), "+r" (r3), "=r" (r4)
452		: : EV_HCALL_CLOBBERS2
453	);
454
455	*msir_val = r4;
456
457	return r3;
458}
459
460/**
461 * fh_system_reset - reset the system
462 *
463 * Returns 0 for success, or an error code.
464 */
465static inline unsigned int fh_system_reset(void)
466{
467	register uintptr_t r11 __asm__("r11");
468	register uintptr_t r3 __asm__("r3");
469
470	r11 = FH_HCALL_TOKEN(FH_SYSTEM_RESET);
471
472	__asm__ __volatile__ ("sc 1"
473		: "+r" (r11), "=r" (r3)
474		: : EV_HCALL_CLOBBERS1
475	);
476
477	return r3;
478}
479
480
481/**
482 * fh_err_get_info - get platform error information
483 * @queue id:
484 * 0 for guest error event queue
485 * 1 for global error event queue
486 *
487 * @pointer to store the platform error data:
488 * platform error data is returned in registers r4 - r11
489 *
490 * Returns 0 for success, or an error code.
491 */
492static inline unsigned int fh_err_get_info(int queue, uint32_t *bufsize,
493	uint32_t addr_hi, uint32_t addr_lo, int peek)
494{
495	register uintptr_t r11 __asm__("r11");
496	register uintptr_t r3 __asm__("r3");
497	register uintptr_t r4 __asm__("r4");
498	register uintptr_t r5 __asm__("r5");
499	register uintptr_t r6 __asm__("r6");
500	register uintptr_t r7 __asm__("r7");
501
502	r11 = FH_HCALL_TOKEN(FH_ERR_GET_INFO);
503	r3 = queue;
504	r4 = *bufsize;
505	r5 = addr_hi;
506	r6 = addr_lo;
507	r7 = peek;
508
509	__asm__ __volatile__ ("sc 1"
510		: "+r" (r11), "+r" (r3), "+r" (r4), "+r" (r5), "+r" (r6),
511		  "+r" (r7)
512		: : EV_HCALL_CLOBBERS5
513	);
514
515	*bufsize = r4;
516
517	return r3;
518}
519
520
521#define FH_VCPU_RUN	0
522#define FH_VCPU_IDLE	1
523#define FH_VCPU_NAP	2
524
525/**
526 * fh_get_core_state - get the state of a vcpu
527 *
528 * @handle: handle of partition containing the vcpu
529 * @vcpu: vcpu number within the partition
530 * @state:the current state of the vcpu, see FH_VCPU_*
531 *
532 * Returns 0 for success, or an error code.
533 */
534static inline unsigned int fh_get_core_state(unsigned int handle,
535	unsigned int vcpu, unsigned int *state)
536{
537	register uintptr_t r11 __asm__("r11");
538	register uintptr_t r3 __asm__("r3");
539	register uintptr_t r4 __asm__("r4");
540
541	r11 = FH_HCALL_TOKEN(FH_GET_CORE_STATE);
542	r3 = handle;
543	r4 = vcpu;
544
545	__asm__ __volatile__ ("sc 1"
546		: "+r" (r11), "+r" (r3), "+r" (r4)
547		: : EV_HCALL_CLOBBERS2
548	);
549
550	*state = r4;
551	return r3;
552}
553
554/**
555 * fh_enter_nap - enter nap on a vcpu
556 *
557 * Note that though the API supports entering nap on a vcpu other
558 * than the caller, this may not be implmented and may return EINVAL.
559 *
560 * @handle: handle of partition containing the vcpu
561 * @vcpu: vcpu number within the partition
562 *
563 * Returns 0 for success, or an error code.
564 */
565static inline unsigned int fh_enter_nap(unsigned int handle, unsigned int vcpu)
566{
567	register uintptr_t r11 __asm__("r11");
568	register uintptr_t r3 __asm__("r3");
569	register uintptr_t r4 __asm__("r4");
570
571	r11 = FH_HCALL_TOKEN(FH_ENTER_NAP);
572	r3 = handle;
573	r4 = vcpu;
574
575	__asm__ __volatile__ ("sc 1"
576		: "+r" (r11), "+r" (r3), "+r" (r4)
577		: : EV_HCALL_CLOBBERS2
578	);
579
580	return r3;
581}
582
583/**
584 * fh_exit_nap - exit nap on a vcpu
585 * @handle: handle of partition containing the vcpu
586 * @vcpu: vcpu number within the partition
587 *
588 * Returns 0 for success, or an error code.
589 */
590static inline unsigned int fh_exit_nap(unsigned int handle, unsigned int vcpu)
591{
592	register uintptr_t r11 __asm__("r11");
593	register uintptr_t r3 __asm__("r3");
594	register uintptr_t r4 __asm__("r4");
595
596	r11 = FH_HCALL_TOKEN(FH_EXIT_NAP);
597	r3 = handle;
598	r4 = vcpu;
599
600	__asm__ __volatile__ ("sc 1"
601		: "+r" (r11), "+r" (r3), "+r" (r4)
602		: : EV_HCALL_CLOBBERS2
603	);
604
605	return r3;
606}
607/**
608 * fh_claim_device - claim a "claimable" shared device
609 * @handle: fsl,hv-device-handle of node to claim
610 *
611 * Returns 0 for success, or an error code.
612 */
613static inline unsigned int fh_claim_device(unsigned int handle)
614{
615	register uintptr_t r11 __asm__("r11");
616	register uintptr_t r3 __asm__("r3");
617
618	r11 = FH_HCALL_TOKEN(FH_CLAIM_DEVICE);
619	r3 = handle;
620
621	__asm__ __volatile__ ("sc 1"
622		: "+r" (r11), "+r" (r3)
623		: : EV_HCALL_CLOBBERS1
624	);
625
626	return r3;
627}
628
629/**
630 * Run deferred DMA disabling on a partition's private devices
631 *
632 * This applies to devices which a partition owns either privately,
633 * or which are claimable and still actively owned by that partition,
634 * and which do not have the no-dma-disable property.
635 *
636 * @handle: partition (must be stopped) whose DMA is to be disabled
637 *
638 * Returns 0 for success, or an error code.
639 */
640static inline unsigned int fh_partition_stop_dma(unsigned int handle)
641{
642	register uintptr_t r11 __asm__("r11");
643	register uintptr_t r3 __asm__("r3");
644
645	r11 = FH_HCALL_TOKEN(FH_PARTITION_STOP_DMA);
646	r3 = handle;
647
648	__asm__ __volatile__ ("sc 1"
649		: "+r" (r11), "+r" (r3)
650		: : EV_HCALL_CLOBBERS1
651	);
652
653	return r3;
654}
655#endif