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[PATCH] ocfs2: zero_user_page conversion
[wrt350n-kernel.git] / arch / ia64 / hp / sim / boot / fw-emu.c
blob300acd913d9c5df9d7fa8aa396a58a6b71c2e9fa
1 /*
2 * PAL & SAL emulation.
3 *
4 * Copyright (C) 1998-2001 Hewlett-Packard Co
5 * David Mosberger-Tang <davidm@hpl.hp.com>
6 */
7
8 #ifdef CONFIG_PCI
9 # include <linux/pci.h>
10 #endif
11
12 #include <linux/efi.h>
13 #include <asm/io.h>
14 #include <asm/pal.h>
15 #include <asm/sal.h>
16
17 #include "ssc.h"
18
19 #define MB (1024*1024UL)
20
21 #define SIMPLE_MEMMAP 1
22
23 #if SIMPLE_MEMMAP
24 # define NUM_MEM_DESCS 4
25 #else
26 # define NUM_MEM_DESCS 16
27 #endif
28
29 static char fw_mem[( sizeof(struct ia64_boot_param)
30 + sizeof(efi_system_table_t)
31 + sizeof(efi_runtime_services_t)
32 + 1*sizeof(efi_config_table_t)
33 + sizeof(struct ia64_sal_systab)
34 + sizeof(struct ia64_sal_desc_entry_point)
35 + NUM_MEM_DESCS*(sizeof(efi_memory_desc_t))
36 + 1024)] __attribute__ ((aligned (8)));
37
38 #define SECS_PER_HOUR (60 * 60)
39 #define SECS_PER_DAY (SECS_PER_HOUR * 24)
40
41 /* Compute the `struct tm' representation of *T,
42 offset OFFSET seconds east of UTC,
43 and store year, yday, mon, mday, wday, hour, min, sec into *TP.
44 Return nonzero if successful. */
45 int
46 offtime (unsigned long t, efi_time_t *tp)
47 {
48 const unsigned short int __mon_yday[2][13] =
49 {
50 /* Normal years. */
51 { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
52 /* Leap years. */
53 { 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
54 };
55 long int days, rem, y;
56 const unsigned short int *ip;
57
58 days = t / SECS_PER_DAY;
59 rem = t % SECS_PER_DAY;
60 while (rem < 0) {
61 rem += SECS_PER_DAY;
62 --days;
63 }
64 while (rem >= SECS_PER_DAY) {
65 rem -= SECS_PER_DAY;
66 ++days;
67 }
68 tp->hour = rem / SECS_PER_HOUR;
69 rem %= SECS_PER_HOUR;
70 tp->minute = rem / 60;
71 tp->second = rem % 60;
72 /* January 1, 1970 was a Thursday. */
73 y = 1970;
74
75 # define DIV(a, b) ((a) / (b) - ((a) % (b) < 0))
76 # define LEAPS_THRU_END_OF(y) (DIV (y, 4) - DIV (y, 100) + DIV (y, 400))
77 # define __isleap(year) \
78 ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
79
80 while (days < 0 || days >= (__isleap (y) ? 366 : 365)) {
81 /* Guess a corrected year, assuming 365 days per year. */
82 long int yg = y + days / 365 - (days % 365 < 0);
83
84 /* Adjust DAYS and Y to match the guessed year. */
85 days -= ((yg - y) * 365 + LEAPS_THRU_END_OF (yg - 1)
86 - LEAPS_THRU_END_OF (y - 1));
87 y = yg;
88 }
89 tp->year = y;
90 ip = __mon_yday[__isleap(y)];
91 for (y = 11; days < (long int) ip[y]; --y)
92 continue;
93 days -= ip[y];
94 tp->month = y + 1;
95 tp->day = days + 1;
96 return 1;
97 }
98
99 extern void pal_emulator_static (void);
100
101 /* Macro to emulate SAL call using legacy IN and OUT calls to CF8, CFC etc.. */
102
103 #define BUILD_CMD(addr) ((0x80000000 | (addr)) & ~3)
104
105 #define REG_OFFSET(addr) (0x00000000000000FF & (addr))
106 #define DEVICE_FUNCTION(addr) (0x000000000000FF00 & (addr))
107 #define BUS_NUMBER(addr) (0x0000000000FF0000 & (addr))
108
109 static efi_status_t
110 fw_efi_get_time (efi_time_t *tm, efi_time_cap_t *tc)
111 {
112 #if defined(CONFIG_IA64_HP_SIM) || defined(CONFIG_IA64_GENERIC)
113 struct {
114 int tv_sec; /* must be 32bits to work */
115 int tv_usec;
116 } tv32bits;
117
118 ssc((unsigned long) &tv32bits, 0, 0, 0, SSC_GET_TOD);
119
120 memset(tm, 0, sizeof(*tm));
121 offtime(tv32bits.tv_sec, tm);
122
123 if (tc)
124 memset(tc, 0, sizeof(*tc));
125 #else
126 # error Not implemented yet...
127 #endif
128 return EFI_SUCCESS;
129 }
130
131 static void
132 efi_reset_system (int reset_type, efi_status_t status, unsigned long data_size, efi_char16_t *data)
133 {
134 #if defined(CONFIG_IA64_HP_SIM) || defined(CONFIG_IA64_GENERIC)
135 ssc(status, 0, 0, 0, SSC_EXIT);
136 #else
137 # error Not implemented yet...
138 #endif
139 }
140
141 static efi_status_t
142 efi_unimplemented (void)
143 {
144 return EFI_UNSUPPORTED;
145 }
146
147 static struct sal_ret_values
148 sal_emulator (long index, unsigned long in1, unsigned long in2,
149 unsigned long in3, unsigned long in4, unsigned long in5,
150 unsigned long in6, unsigned long in7)
151 {
152 long r9 = 0;
153 long r10 = 0;
154 long r11 = 0;
155 long status;
156
157 /*
158 * Don't do a "switch" here since that gives us code that
159 * isn't self-relocatable.
160 */
161 status = 0;
162 if (index == SAL_FREQ_BASE) {
163 switch (in1) {
164 case SAL_FREQ_BASE_PLATFORM:
165 r9 = 200000000;
166 break;
167
168 case SAL_FREQ_BASE_INTERVAL_TIMER:
169 /*
170 * Is this supposed to be the cr.itc frequency
171 * or something platform specific? The SAL
172 * doc ain't exactly clear on this...
173 */
174 r9 = 700000000;
175 break;
176
177 case SAL_FREQ_BASE_REALTIME_CLOCK:
178 r9 = 1;
179 break;
180
181 default:
182 status = -1;
183 break;
184 }
185 } else if (index == SAL_SET_VECTORS) {
186 ;
187 } else if (index == SAL_GET_STATE_INFO) {
188 ;
189 } else if (index == SAL_GET_STATE_INFO_SIZE) {
190 ;
191 } else if (index == SAL_CLEAR_STATE_INFO) {
192 ;
193 } else if (index == SAL_MC_RENDEZ) {
194 ;
195 } else if (index == SAL_MC_SET_PARAMS) {
196 ;
197 } else if (index == SAL_CACHE_FLUSH) {
198 ;
199 } else if (index == SAL_CACHE_INIT) {
200 ;
201 #ifdef CONFIG_PCI
202 } else if (index == SAL_PCI_CONFIG_READ) {
203 /*
204 * in1 contains the PCI configuration address and in2
205 * the size of the read. The value that is read is
206 * returned via the general register r9.
207 */
208 outl(BUILD_CMD(in1), 0xCF8);
209 if (in2 == 1) /* Reading byte */
210 r9 = inb(0xCFC + ((REG_OFFSET(in1) & 3)));
211 else if (in2 == 2) /* Reading word */
212 r9 = inw(0xCFC + ((REG_OFFSET(in1) & 2)));
213 else /* Reading dword */
214 r9 = inl(0xCFC);
215 status = PCIBIOS_SUCCESSFUL;
216 } else if (index == SAL_PCI_CONFIG_WRITE) {
217 /*
218 * in1 contains the PCI configuration address, in2 the
219 * size of the write, and in3 the actual value to be
220 * written out.
221 */
222 outl(BUILD_CMD(in1), 0xCF8);
223 if (in2 == 1) /* Writing byte */
224 outb(in3, 0xCFC + ((REG_OFFSET(in1) & 3)));
225 else if (in2 == 2) /* Writing word */
226 outw(in3, 0xCFC + ((REG_OFFSET(in1) & 2)));
227 else /* Writing dword */
228 outl(in3, 0xCFC);
229 status = PCIBIOS_SUCCESSFUL;
230 #endif /* CONFIG_PCI */
231 } else if (index == SAL_UPDATE_PAL) {
232 ;
233 } else {
234 status = -1;
235 }
236 return ((struct sal_ret_values) {status, r9, r10, r11});
237 }
238
239 struct ia64_boot_param *
240 sys_fw_init (const char *args, int arglen)
241 {
242 efi_system_table_t *efi_systab;
243 efi_runtime_services_t *efi_runtime;
244 efi_config_table_t *efi_tables;
245 struct ia64_sal_systab *sal_systab;
246 efi_memory_desc_t *efi_memmap, *md;
247 unsigned long *pal_desc, *sal_desc;
248 struct ia64_sal_desc_entry_point *sal_ed;
249 struct ia64_boot_param *bp;
250 unsigned char checksum = 0;
251 char *cp, *cmd_line;
252 int i = 0;
253 # define MAKE_MD(typ, attr, start, end) \
254 do { \
255 md = efi_memmap + i++; \
256 md->type = typ; \
257 md->pad = 0; \
258 md->phys_addr = start; \
259 md->virt_addr = 0; \
260 md->num_pages = (end - start) >> 12; \
261 md->attribute = attr; \
262 } while (0)
263
264 memset(fw_mem, 0, sizeof(fw_mem));
265
266 pal_desc = (unsigned long *) &pal_emulator_static;
267 sal_desc = (unsigned long *) &sal_emulator;
268
269 cp = fw_mem;
270 efi_systab = (void *) cp; cp += sizeof(*efi_systab);
271 efi_runtime = (void *) cp; cp += sizeof(*efi_runtime);
272 efi_tables = (void *) cp; cp += sizeof(*efi_tables);
273 sal_systab = (void *) cp; cp += sizeof(*sal_systab);
274 sal_ed = (void *) cp; cp += sizeof(*sal_ed);
275 efi_memmap = (void *) cp; cp += NUM_MEM_DESCS*sizeof(*efi_memmap);
276 bp = (void *) cp; cp += sizeof(*bp);
277 cmd_line = (void *) cp;
278
279 if (args) {
280 if (arglen >= 1024)
281 arglen = 1023;
282 memcpy(cmd_line, args, arglen);
283 } else {
284 arglen = 0;
285 }
286 cmd_line[arglen] = '\0';
287
288 memset(efi_systab, 0, sizeof(efi_systab));
289 efi_systab->hdr.signature = EFI_SYSTEM_TABLE_SIGNATURE;
290 efi_systab->hdr.revision = ((1 << 16) | 00);
291 efi_systab->hdr.headersize = sizeof(efi_systab->hdr);
292 efi_systab->fw_vendor = __pa("H\0e\0w\0l\0e\0t\0t\0-\0P\0a\0c\0k\0a\0r\0d\0\0");
293 efi_systab->fw_revision = 1;
294 efi_systab->runtime = (void *) __pa(efi_runtime);
295 efi_systab->nr_tables = 1;
296 efi_systab->tables = __pa(efi_tables);
297
298 efi_runtime->hdr.signature = EFI_RUNTIME_SERVICES_SIGNATURE;
299 efi_runtime->hdr.revision = EFI_RUNTIME_SERVICES_REVISION;
300 efi_runtime->hdr.headersize = sizeof(efi_runtime->hdr);
301 efi_runtime->get_time = __pa(&fw_efi_get_time);
302 efi_runtime->set_time = __pa(&efi_unimplemented);
303 efi_runtime->get_wakeup_time = __pa(&efi_unimplemented);
304 efi_runtime->set_wakeup_time = __pa(&efi_unimplemented);
305 efi_runtime->set_virtual_address_map = __pa(&efi_unimplemented);
306 efi_runtime->get_variable = __pa(&efi_unimplemented);
307 efi_runtime->get_next_variable = __pa(&efi_unimplemented);
308 efi_runtime->set_variable = __pa(&efi_unimplemented);
309 efi_runtime->get_next_high_mono_count = __pa(&efi_unimplemented);
310 efi_runtime->reset_system = __pa(&efi_reset_system);
311
312 efi_tables->guid = SAL_SYSTEM_TABLE_GUID;
313 efi_tables->table = __pa(sal_systab);
314
315 /* fill in the SAL system table: */
316 memcpy(sal_systab->signature, "SST_", 4);
317 sal_systab->size = sizeof(*sal_systab);
318 sal_systab->sal_rev_minor = 1;
319 sal_systab->sal_rev_major = 0;
320 sal_systab->entry_count = 1;
321
322 #ifdef CONFIG_IA64_GENERIC
323 strcpy(sal_systab->oem_id, "Generic");
324 strcpy(sal_systab->product_id, "IA-64 system");
325 #endif
326
327 #ifdef CONFIG_IA64_HP_SIM
328 strcpy(sal_systab->oem_id, "Hewlett-Packard");
329 strcpy(sal_systab->product_id, "HP-simulator");
330 #endif
331
332 #ifdef CONFIG_IA64_SDV
333 strcpy(sal_systab->oem_id, "Intel");
334 strcpy(sal_systab->product_id, "SDV");
335 #endif
336
337 /* fill in an entry point: */
338 sal_ed->type = SAL_DESC_ENTRY_POINT;
339 sal_ed->pal_proc = __pa(pal_desc[0]);
340 sal_ed->sal_proc = __pa(sal_desc[0]);
341 sal_ed->gp = __pa(sal_desc[1]);
342
343 for (cp = (char *) sal_systab; cp < (char *) efi_memmap; ++cp)
344 checksum += *cp;
345
346 sal_systab->checksum = -checksum;
347
348 #if SIMPLE_MEMMAP
349 /* simulate free memory at physical address zero */
350 MAKE_MD(EFI_BOOT_SERVICES_DATA, EFI_MEMORY_WB, 0*MB, 1*MB);
351 MAKE_MD(EFI_PAL_CODE, EFI_MEMORY_WB, 1*MB, 2*MB);
352 MAKE_MD(EFI_CONVENTIONAL_MEMORY, EFI_MEMORY_WB, 2*MB, 130*MB);
353 MAKE_MD(EFI_CONVENTIONAL_MEMORY, EFI_MEMORY_WB, 4096*MB, 4128*MB);
354 #else
355 MAKE_MD( 4, 0x9, 0x0000000000000000, 0x0000000000001000);
356 MAKE_MD( 7, 0x9, 0x0000000000001000, 0x000000000008a000);
357 MAKE_MD( 4, 0x9, 0x000000000008a000, 0x00000000000a0000);
358 MAKE_MD( 5, 0x8000000000000009, 0x00000000000c0000, 0x0000000000100000);
359 MAKE_MD( 7, 0x9, 0x0000000000100000, 0x0000000004400000);
360 MAKE_MD( 2, 0x9, 0x0000000004400000, 0x0000000004be5000);
361 MAKE_MD( 7, 0x9, 0x0000000004be5000, 0x000000007f77e000);
362 MAKE_MD( 6, 0x8000000000000009, 0x000000007f77e000, 0x000000007fb94000);
363 MAKE_MD( 6, 0x8000000000000009, 0x000000007fb94000, 0x000000007fb95000);
364 MAKE_MD( 6, 0x8000000000000009, 0x000000007fb95000, 0x000000007fc00000);
365 MAKE_MD(13, 0x8000000000000009, 0x000000007fc00000, 0x000000007fc3a000);
366 MAKE_MD( 7, 0x9, 0x000000007fc3a000, 0x000000007fea0000);
367 MAKE_MD( 5, 0x8000000000000009, 0x000000007fea0000, 0x000000007fea8000);
368 MAKE_MD( 7, 0x9, 0x000000007fea8000, 0x000000007feab000);
369 MAKE_MD( 5, 0x8000000000000009, 0x000000007feab000, 0x000000007ffff000);
370 MAKE_MD( 7, 0x9, 0x00000000ff400000, 0x0000000104000000);
371 #endif
372
373 bp->efi_systab = __pa(&fw_mem);
374 bp->efi_memmap = __pa(efi_memmap);
375 bp->efi_memmap_size = NUM_MEM_DESCS*sizeof(efi_memory_desc_t);
376 bp->efi_memdesc_size = sizeof(efi_memory_desc_t);
377 bp->efi_memdesc_version = 1;
378 bp->command_line = __pa(cmd_line);
379 bp->console_info.num_cols = 80;
380 bp->console_info.num_rows = 25;
381 bp->console_info.orig_x = 0;
382 bp->console_info.orig_y = 24;
383 bp->fpswa = 0;
384
385 return bp;
386 }
WRT350N Kernel Patches