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