1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Copyright (C) 2000, 2001, 2002 Broadcom Corporation
4  */
5 
6 /*
7  *
8  * Broadcom Common Firmware Environment (CFE)
9  *
10  * This module contains device function stubs (small routines to
11  * call the standard "iocb" interface entry point to CFE).
12  * There should be one routine here per iocb function call.
13  *
14  * Authors:  Mitch Lichtenberg, Chris Demetriou
15  */
16 
17 #include <asm/fw/cfe/cfe_api.h>
18 #include "cfe_api_int.h"
19 
20 /* Cast from a native pointer to a cfe_xptr_t and back.	 */
21 #define XPTR_FROM_NATIVE(n)	((cfe_xptr_t) (intptr_t) (n))
22 #define NATIVE_FROM_XPTR(x)	((void *) (intptr_t) (x))
23 
24 int cfe_iocb_dispatch(struct cfe_xiocb *xiocb);
25 
26 /*
27  * Declare the dispatch function with args of "intptr_t".
28  * This makes sure whatever model we're compiling in
29  * puts the pointers in a single register.  For example,
30  * combining -mlong64 and -mips1 or -mips2 would lead to
31  * trouble, since the handle and IOCB pointer will be
32  * passed in two registers each, and CFE expects one.
33  */
34 
35 static int (*cfe_dispfunc) (intptr_t handle, intptr_t xiocb);
36 static u64 cfe_handle;
37 
cfe_init(u64 handle,u64 ept)38 int cfe_init(u64 handle, u64 ept)
39 {
40 	cfe_dispfunc = NATIVE_FROM_XPTR(ept);
41 	cfe_handle = handle;
42 	return 0;
43 }
44 
cfe_iocb_dispatch(struct cfe_xiocb * xiocb)45 int cfe_iocb_dispatch(struct cfe_xiocb * xiocb)
46 {
47 	if (!cfe_dispfunc)
48 		return -1;
49 	return (*cfe_dispfunc) ((intptr_t) cfe_handle, (intptr_t) xiocb);
50 }
51 
cfe_close(int handle)52 int cfe_close(int handle)
53 {
54 	struct cfe_xiocb xiocb;
55 
56 	xiocb.xiocb_fcode = CFE_CMD_DEV_CLOSE;
57 	xiocb.xiocb_status = 0;
58 	xiocb.xiocb_handle = handle;
59 	xiocb.xiocb_flags = 0;
60 	xiocb.xiocb_psize = 0;
61 
62 	cfe_iocb_dispatch(&xiocb);
63 
64 	return xiocb.xiocb_status;
65 
66 }
67 
cfe_cpu_start(int cpu,void (* fn)(void),long sp,long gp,long a1)68 int cfe_cpu_start(int cpu, void (*fn) (void), long sp, long gp, long a1)
69 {
70 	struct cfe_xiocb xiocb;
71 
72 	xiocb.xiocb_fcode = CFE_CMD_FW_CPUCTL;
73 	xiocb.xiocb_status = 0;
74 	xiocb.xiocb_handle = 0;
75 	xiocb.xiocb_flags = 0;
76 	xiocb.xiocb_psize = sizeof(struct xiocb_cpuctl);
77 	xiocb.plist.xiocb_cpuctl.cpu_number = cpu;
78 	xiocb.plist.xiocb_cpuctl.cpu_command = CFE_CPU_CMD_START;
79 	xiocb.plist.xiocb_cpuctl.gp_val = gp;
80 	xiocb.plist.xiocb_cpuctl.sp_val = sp;
81 	xiocb.plist.xiocb_cpuctl.a1_val = a1;
82 	xiocb.plist.xiocb_cpuctl.start_addr = (long) fn;
83 
84 	cfe_iocb_dispatch(&xiocb);
85 
86 	return xiocb.xiocb_status;
87 }
88 
cfe_cpu_stop(int cpu)89 int cfe_cpu_stop(int cpu)
90 {
91 	struct cfe_xiocb xiocb;
92 
93 	xiocb.xiocb_fcode = CFE_CMD_FW_CPUCTL;
94 	xiocb.xiocb_status = 0;
95 	xiocb.xiocb_handle = 0;
96 	xiocb.xiocb_flags = 0;
97 	xiocb.xiocb_psize = sizeof(struct xiocb_cpuctl);
98 	xiocb.plist.xiocb_cpuctl.cpu_number = cpu;
99 	xiocb.plist.xiocb_cpuctl.cpu_command = CFE_CPU_CMD_STOP;
100 
101 	cfe_iocb_dispatch(&xiocb);
102 
103 	return xiocb.xiocb_status;
104 }
105 
cfe_enumenv(int idx,char * name,int namelen,char * val,int vallen)106 int cfe_enumenv(int idx, char *name, int namelen, char *val, int vallen)
107 {
108 	struct cfe_xiocb xiocb;
109 
110 	xiocb.xiocb_fcode = CFE_CMD_ENV_SET;
111 	xiocb.xiocb_status = 0;
112 	xiocb.xiocb_handle = 0;
113 	xiocb.xiocb_flags = 0;
114 	xiocb.xiocb_psize = sizeof(struct xiocb_envbuf);
115 	xiocb.plist.xiocb_envbuf.enum_idx = idx;
116 	xiocb.plist.xiocb_envbuf.name_ptr = XPTR_FROM_NATIVE(name);
117 	xiocb.plist.xiocb_envbuf.name_length = namelen;
118 	xiocb.plist.xiocb_envbuf.val_ptr = XPTR_FROM_NATIVE(val);
119 	xiocb.plist.xiocb_envbuf.val_length = vallen;
120 
121 	cfe_iocb_dispatch(&xiocb);
122 
123 	return xiocb.xiocb_status;
124 }
125 
126 int
cfe_enummem(int idx,int flags,u64 * start,u64 * length,u64 * type)127 cfe_enummem(int idx, int flags, u64 *start, u64 *length, u64 *type)
128 {
129 	struct cfe_xiocb xiocb;
130 
131 	xiocb.xiocb_fcode = CFE_CMD_FW_MEMENUM;
132 	xiocb.xiocb_status = 0;
133 	xiocb.xiocb_handle = 0;
134 	xiocb.xiocb_flags = flags;
135 	xiocb.xiocb_psize = sizeof(struct xiocb_meminfo);
136 	xiocb.plist.xiocb_meminfo.mi_idx = idx;
137 
138 	cfe_iocb_dispatch(&xiocb);
139 
140 	if (xiocb.xiocb_status < 0)
141 		return xiocb.xiocb_status;
142 
143 	*start = xiocb.plist.xiocb_meminfo.mi_addr;
144 	*length = xiocb.plist.xiocb_meminfo.mi_size;
145 	*type = xiocb.plist.xiocb_meminfo.mi_type;
146 
147 	return 0;
148 }
149 
cfe_exit(int warm,int status)150 int cfe_exit(int warm, int status)
151 {
152 	struct cfe_xiocb xiocb;
153 
154 	xiocb.xiocb_fcode = CFE_CMD_FW_RESTART;
155 	xiocb.xiocb_status = 0;
156 	xiocb.xiocb_handle = 0;
157 	xiocb.xiocb_flags = warm ? CFE_FLG_WARMSTART : 0;
158 	xiocb.xiocb_psize = sizeof(struct xiocb_exitstat);
159 	xiocb.plist.xiocb_exitstat.status = status;
160 
161 	cfe_iocb_dispatch(&xiocb);
162 
163 	return xiocb.xiocb_status;
164 }
165 
cfe_flushcache(int flg)166 int cfe_flushcache(int flg)
167 {
168 	struct cfe_xiocb xiocb;
169 
170 	xiocb.xiocb_fcode = CFE_CMD_FW_FLUSHCACHE;
171 	xiocb.xiocb_status = 0;
172 	xiocb.xiocb_handle = 0;
173 	xiocb.xiocb_flags = flg;
174 	xiocb.xiocb_psize = 0;
175 
176 	cfe_iocb_dispatch(&xiocb);
177 
178 	return xiocb.xiocb_status;
179 }
180 
cfe_getdevinfo(char * name)181 int cfe_getdevinfo(char *name)
182 {
183 	struct cfe_xiocb xiocb;
184 
185 	xiocb.xiocb_fcode = CFE_CMD_DEV_GETINFO;
186 	xiocb.xiocb_status = 0;
187 	xiocb.xiocb_handle = 0;
188 	xiocb.xiocb_flags = 0;
189 	xiocb.xiocb_psize = sizeof(struct xiocb_buffer);
190 	xiocb.plist.xiocb_buffer.buf_offset = 0;
191 	xiocb.plist.xiocb_buffer.buf_ptr = XPTR_FROM_NATIVE(name);
192 	xiocb.plist.xiocb_buffer.buf_length = strlen(name);
193 
194 	cfe_iocb_dispatch(&xiocb);
195 
196 	if (xiocb.xiocb_status < 0)
197 		return xiocb.xiocb_status;
198 	return xiocb.plist.xiocb_buffer.buf_ioctlcmd;
199 }
200 
cfe_getenv(char * name,char * dest,int destlen)201 int cfe_getenv(char *name, char *dest, int destlen)
202 {
203 	struct cfe_xiocb xiocb;
204 
205 	*dest = 0;
206 
207 	xiocb.xiocb_fcode = CFE_CMD_ENV_GET;
208 	xiocb.xiocb_status = 0;
209 	xiocb.xiocb_handle = 0;
210 	xiocb.xiocb_flags = 0;
211 	xiocb.xiocb_psize = sizeof(struct xiocb_envbuf);
212 	xiocb.plist.xiocb_envbuf.enum_idx = 0;
213 	xiocb.plist.xiocb_envbuf.name_ptr = XPTR_FROM_NATIVE(name);
214 	xiocb.plist.xiocb_envbuf.name_length = strlen(name);
215 	xiocb.plist.xiocb_envbuf.val_ptr = XPTR_FROM_NATIVE(dest);
216 	xiocb.plist.xiocb_envbuf.val_length = destlen;
217 
218 	cfe_iocb_dispatch(&xiocb);
219 
220 	return xiocb.xiocb_status;
221 }
222 
cfe_getfwinfo(cfe_fwinfo_t * info)223 int cfe_getfwinfo(cfe_fwinfo_t * info)
224 {
225 	struct cfe_xiocb xiocb;
226 
227 	xiocb.xiocb_fcode = CFE_CMD_FW_GETINFO;
228 	xiocb.xiocb_status = 0;
229 	xiocb.xiocb_handle = 0;
230 	xiocb.xiocb_flags = 0;
231 	xiocb.xiocb_psize = sizeof(struct xiocb_fwinfo);
232 
233 	cfe_iocb_dispatch(&xiocb);
234 
235 	if (xiocb.xiocb_status < 0)
236 		return xiocb.xiocb_status;
237 
238 	info->fwi_version = xiocb.plist.xiocb_fwinfo.fwi_version;
239 	info->fwi_totalmem = xiocb.plist.xiocb_fwinfo.fwi_totalmem;
240 	info->fwi_flags = xiocb.plist.xiocb_fwinfo.fwi_flags;
241 	info->fwi_boardid = xiocb.plist.xiocb_fwinfo.fwi_boardid;
242 	info->fwi_bootarea_va = xiocb.plist.xiocb_fwinfo.fwi_bootarea_va;
243 	info->fwi_bootarea_pa = xiocb.plist.xiocb_fwinfo.fwi_bootarea_pa;
244 	info->fwi_bootarea_size =
245 	    xiocb.plist.xiocb_fwinfo.fwi_bootarea_size;
246 
247 	return 0;
248 }
249 
cfe_getstdhandle(int flg)250 int cfe_getstdhandle(int flg)
251 {
252 	struct cfe_xiocb xiocb;
253 
254 	xiocb.xiocb_fcode = CFE_CMD_DEV_GETHANDLE;
255 	xiocb.xiocb_status = 0;
256 	xiocb.xiocb_handle = 0;
257 	xiocb.xiocb_flags = flg;
258 	xiocb.xiocb_psize = 0;
259 
260 	cfe_iocb_dispatch(&xiocb);
261 
262 	if (xiocb.xiocb_status < 0)
263 		return xiocb.xiocb_status;
264 	return xiocb.xiocb_handle;
265 }
266 
267 int64_t
cfe_getticks(void)268 cfe_getticks(void)
269 {
270 	struct cfe_xiocb xiocb;
271 
272 	xiocb.xiocb_fcode = CFE_CMD_FW_GETTIME;
273 	xiocb.xiocb_status = 0;
274 	xiocb.xiocb_handle = 0;
275 	xiocb.xiocb_flags = 0;
276 	xiocb.xiocb_psize = sizeof(struct xiocb_time);
277 	xiocb.plist.xiocb_time.ticks = 0;
278 
279 	cfe_iocb_dispatch(&xiocb);
280 
281 	return xiocb.plist.xiocb_time.ticks;
282 
283 }
284 
cfe_inpstat(int handle)285 int cfe_inpstat(int handle)
286 {
287 	struct cfe_xiocb xiocb;
288 
289 	xiocb.xiocb_fcode = CFE_CMD_DEV_INPSTAT;
290 	xiocb.xiocb_status = 0;
291 	xiocb.xiocb_handle = handle;
292 	xiocb.xiocb_flags = 0;
293 	xiocb.xiocb_psize = sizeof(struct xiocb_inpstat);
294 	xiocb.plist.xiocb_inpstat.inp_status = 0;
295 
296 	cfe_iocb_dispatch(&xiocb);
297 
298 	if (xiocb.xiocb_status < 0)
299 		return xiocb.xiocb_status;
300 	return xiocb.plist.xiocb_inpstat.inp_status;
301 }
302 
303 int
cfe_ioctl(int handle,unsigned int ioctlnum,unsigned char * buffer,int length,int * retlen,u64 offset)304 cfe_ioctl(int handle, unsigned int ioctlnum, unsigned char *buffer,
305 	  int length, int *retlen, u64 offset)
306 {
307 	struct cfe_xiocb xiocb;
308 
309 	xiocb.xiocb_fcode = CFE_CMD_DEV_IOCTL;
310 	xiocb.xiocb_status = 0;
311 	xiocb.xiocb_handle = handle;
312 	xiocb.xiocb_flags = 0;
313 	xiocb.xiocb_psize = sizeof(struct xiocb_buffer);
314 	xiocb.plist.xiocb_buffer.buf_offset = offset;
315 	xiocb.plist.xiocb_buffer.buf_ioctlcmd = ioctlnum;
316 	xiocb.plist.xiocb_buffer.buf_ptr = XPTR_FROM_NATIVE(buffer);
317 	xiocb.plist.xiocb_buffer.buf_length = length;
318 
319 	cfe_iocb_dispatch(&xiocb);
320 
321 	if (retlen)
322 		*retlen = xiocb.plist.xiocb_buffer.buf_retlen;
323 	return xiocb.xiocb_status;
324 }
325 
cfe_open(char * name)326 int cfe_open(char *name)
327 {
328 	struct cfe_xiocb xiocb;
329 
330 	xiocb.xiocb_fcode = CFE_CMD_DEV_OPEN;
331 	xiocb.xiocb_status = 0;
332 	xiocb.xiocb_handle = 0;
333 	xiocb.xiocb_flags = 0;
334 	xiocb.xiocb_psize = sizeof(struct xiocb_buffer);
335 	xiocb.plist.xiocb_buffer.buf_offset = 0;
336 	xiocb.plist.xiocb_buffer.buf_ptr = XPTR_FROM_NATIVE(name);
337 	xiocb.plist.xiocb_buffer.buf_length = strlen(name);
338 
339 	cfe_iocb_dispatch(&xiocb);
340 
341 	if (xiocb.xiocb_status < 0)
342 		return xiocb.xiocb_status;
343 	return xiocb.xiocb_handle;
344 }
345 
cfe_read(int handle,unsigned char * buffer,int length)346 int cfe_read(int handle, unsigned char *buffer, int length)
347 {
348 	return cfe_readblk(handle, 0, buffer, length);
349 }
350 
cfe_readblk(int handle,s64 offset,unsigned char * buffer,int length)351 int cfe_readblk(int handle, s64 offset, unsigned char *buffer, int length)
352 {
353 	struct cfe_xiocb xiocb;
354 
355 	xiocb.xiocb_fcode = CFE_CMD_DEV_READ;
356 	xiocb.xiocb_status = 0;
357 	xiocb.xiocb_handle = handle;
358 	xiocb.xiocb_flags = 0;
359 	xiocb.xiocb_psize = sizeof(struct xiocb_buffer);
360 	xiocb.plist.xiocb_buffer.buf_offset = offset;
361 	xiocb.plist.xiocb_buffer.buf_ptr = XPTR_FROM_NATIVE(buffer);
362 	xiocb.plist.xiocb_buffer.buf_length = length;
363 
364 	cfe_iocb_dispatch(&xiocb);
365 
366 	if (xiocb.xiocb_status < 0)
367 		return xiocb.xiocb_status;
368 	return xiocb.plist.xiocb_buffer.buf_retlen;
369 }
370 
cfe_setenv(char * name,char * val)371 int cfe_setenv(char *name, char *val)
372 {
373 	struct cfe_xiocb xiocb;
374 
375 	xiocb.xiocb_fcode = CFE_CMD_ENV_SET;
376 	xiocb.xiocb_status = 0;
377 	xiocb.xiocb_handle = 0;
378 	xiocb.xiocb_flags = 0;
379 	xiocb.xiocb_psize = sizeof(struct xiocb_envbuf);
380 	xiocb.plist.xiocb_envbuf.enum_idx = 0;
381 	xiocb.plist.xiocb_envbuf.name_ptr = XPTR_FROM_NATIVE(name);
382 	xiocb.plist.xiocb_envbuf.name_length = strlen(name);
383 	xiocb.plist.xiocb_envbuf.val_ptr = XPTR_FROM_NATIVE(val);
384 	xiocb.plist.xiocb_envbuf.val_length = strlen(val);
385 
386 	cfe_iocb_dispatch(&xiocb);
387 
388 	return xiocb.xiocb_status;
389 }
390 
cfe_write(int handle,const char * buffer,int length)391 int cfe_write(int handle, const char *buffer, int length)
392 {
393 	return cfe_writeblk(handle, 0, buffer, length);
394 }
395 
cfe_writeblk(int handle,s64 offset,const char * buffer,int length)396 int cfe_writeblk(int handle, s64 offset, const char *buffer, int length)
397 {
398 	struct cfe_xiocb xiocb;
399 
400 	xiocb.xiocb_fcode = CFE_CMD_DEV_WRITE;
401 	xiocb.xiocb_status = 0;
402 	xiocb.xiocb_handle = handle;
403 	xiocb.xiocb_flags = 0;
404 	xiocb.xiocb_psize = sizeof(struct xiocb_buffer);
405 	xiocb.plist.xiocb_buffer.buf_offset = offset;
406 	xiocb.plist.xiocb_buffer.buf_ptr = XPTR_FROM_NATIVE(buffer);
407 	xiocb.plist.xiocb_buffer.buf_length = length;
408 
409 	cfe_iocb_dispatch(&xiocb);
410 
411 	if (xiocb.xiocb_status < 0)
412 		return xiocb.xiocb_status;
413 	return xiocb.plist.xiocb_buffer.buf_retlen;
414 }
415