Pull pending-2.6.14 into release branch
[linux-2.6.git] / arch / ia64 / hp / sim / boot / fw-emu.c
1 /*
2  * PAL & SAL emulation.
3  *
4  * Copyright (C) 1998-2001 Hewlett-Packard Co
5  *      David Mosberger-Tang <davidm@hpl.hp.com>
6  */
7 #include <linux/config.h>
8
9 #ifdef CONFIG_PCI
10 # include <linux/pci.h>
11 #endif
12
13 #include <linux/efi.h>
14 #include <asm/io.h>
15 #include <asm/pal.h>
16 #include <asm/sal.h>
17
18 #include "ssc.h"
19
20 #define MB      (1024*1024UL)
21
22 #define SIMPLE_MEMMAP   1
23
24 #if SIMPLE_MEMMAP
25 # define NUM_MEM_DESCS  4
26 #else
27 # define NUM_MEM_DESCS  16
28 #endif
29
30 static char fw_mem[(  sizeof(struct ia64_boot_param)
31                     + sizeof(efi_system_table_t)
32                     + sizeof(efi_runtime_services_t)
33                     + 1*sizeof(efi_config_table_t)
34                     + sizeof(struct ia64_sal_systab)
35                     + sizeof(struct ia64_sal_desc_entry_point)
36                     + NUM_MEM_DESCS*(sizeof(efi_memory_desc_t))
37                     + 1024)] __attribute__ ((aligned (8)));
38
39 #define SECS_PER_HOUR   (60 * 60)
40 #define SECS_PER_DAY    (SECS_PER_HOUR * 24)
41
42 /* Compute the `struct tm' representation of *T,
43    offset OFFSET seconds east of UTC,
44    and store year, yday, mon, mday, wday, hour, min, sec into *TP.
45    Return nonzero if successful.  */
46 int
47 offtime (unsigned long t, efi_time_t *tp)
48 {
49         const unsigned short int __mon_yday[2][13] =
50         {
51                 /* Normal years.  */
52                 { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
53                 /* Leap years.  */
54                 { 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
55         };
56         long int days, rem, y;
57         const unsigned short int *ip;
58
59         days = t / SECS_PER_DAY;
60         rem = t % SECS_PER_DAY;
61         while (rem < 0) {
62                 rem += SECS_PER_DAY;
63                 --days;
64         }
65         while (rem >= SECS_PER_DAY) {
66                 rem -= SECS_PER_DAY;
67                 ++days;
68         }
69         tp->hour = rem / SECS_PER_HOUR;
70         rem %= SECS_PER_HOUR;
71         tp->minute = rem / 60;
72         tp->second = rem % 60;
73         /* January 1, 1970 was a Thursday.  */
74         y = 1970;
75
76 #       define DIV(a, b) ((a) / (b) - ((a) % (b) < 0))
77 #       define LEAPS_THRU_END_OF(y) (DIV (y, 4) - DIV (y, 100) + DIV (y, 400))
78 #       define __isleap(year) \
79           ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
80
81         while (days < 0 || days >= (__isleap (y) ? 366 : 365)) {
82                 /* Guess a corrected year, assuming 365 days per year.  */
83                 long int yg = y + days / 365 - (days % 365 < 0);
84
85                 /* Adjust DAYS and Y to match the guessed year.  */
86                 days -= ((yg - y) * 365 + LEAPS_THRU_END_OF (yg - 1)
87                          - LEAPS_THRU_END_OF (y - 1));
88                 y = yg;
89         }
90         tp->year = y;
91         ip = __mon_yday[__isleap(y)];
92         for (y = 11; days < (long int) ip[y]; --y)
93                 continue;
94         days -= ip[y];
95         tp->month = y + 1;
96         tp->day = days + 1;
97         return 1;
98 }
99
100 extern void pal_emulator_static (void);
101
102 /* Macro to emulate SAL call using legacy IN and OUT calls to CF8, CFC etc.. */
103
104 #define BUILD_CMD(addr)         ((0x80000000 | (addr)) & ~3)
105
106 #define REG_OFFSET(addr)        (0x00000000000000FF & (addr))
107 #define DEVICE_FUNCTION(addr)   (0x000000000000FF00 & (addr))
108 #define BUS_NUMBER(addr)        (0x0000000000FF0000 & (addr))
109
110 static efi_status_t
111 fw_efi_get_time (efi_time_t *tm, efi_time_cap_t *tc)
112 {
113 #if defined(CONFIG_IA64_HP_SIM) || defined(CONFIG_IA64_GENERIC)
114         struct {
115                 int tv_sec;     /* must be 32bits to work */
116                 int tv_usec;
117         } tv32bits;
118
119         ssc((unsigned long) &tv32bits, 0, 0, 0, SSC_GET_TOD);
120
121         memset(tm, 0, sizeof(*tm));
122         offtime(tv32bits.tv_sec, tm);
123
124         if (tc)
125                 memset(tc, 0, sizeof(*tc));
126 #else
127 #       error Not implemented yet...
128 #endif
129         return EFI_SUCCESS;
130 }
131
132 static void
133 efi_reset_system (int reset_type, efi_status_t status, unsigned long data_size, efi_char16_t *data)
134 {
135 #if defined(CONFIG_IA64_HP_SIM) || defined(CONFIG_IA64_GENERIC)
136         ssc(status, 0, 0, 0, SSC_EXIT);
137 #else
138 #       error Not implemented yet...
139 #endif
140 }
141
142 static efi_status_t
143 efi_unimplemented (void)
144 {
145         return EFI_UNSUPPORTED;
146 }
147
148 static struct sal_ret_values
149 sal_emulator (long index, unsigned long in1, unsigned long in2,
150               unsigned long in3, unsigned long in4, unsigned long in5,
151               unsigned long in6, unsigned long in7)
152 {
153         long r9  = 0;
154         long r10 = 0;
155         long r11 = 0;
156         long status;
157
158         /*
159          * Don't do a "switch" here since that gives us code that
160          * isn't self-relocatable.
161          */
162         status = 0;
163         if (index == SAL_FREQ_BASE) {
164                 switch (in1) {
165                       case SAL_FREQ_BASE_PLATFORM:
166                         r9 = 200000000;
167                         break;
168
169                       case SAL_FREQ_BASE_INTERVAL_TIMER:
170                         /*
171                          * Is this supposed to be the cr.itc frequency
172                          * or something platform specific?  The SAL
173                          * doc ain't exactly clear on this...
174                          */
175                         r9 = 700000000;
176                         break;
177
178                       case SAL_FREQ_BASE_REALTIME_CLOCK:
179                         r9 = 1;
180                         break;
181
182                       default:
183                         status = -1;
184                         break;
185                 }
186         } else if (index == SAL_SET_VECTORS) {
187                 ;
188         } else if (index == SAL_GET_STATE_INFO) {
189                 ;
190         } else if (index == SAL_GET_STATE_INFO_SIZE) {
191                 ;
192         } else if (index == SAL_CLEAR_STATE_INFO) {
193                 ;
194         } else if (index == SAL_MC_RENDEZ) {
195                 ;
196         } else if (index == SAL_MC_SET_PARAMS) {
197                 ;
198         } else if (index == SAL_CACHE_FLUSH) {
199                 ;
200         } else if (index == SAL_CACHE_INIT) {
201                 ;
202 #ifdef CONFIG_PCI
203         } else if (index == SAL_PCI_CONFIG_READ) {
204                 /*
205                  * in1 contains the PCI configuration address and in2
206                  * the size of the read.  The value that is read is
207                  * returned via the general register r9.
208                  */
209                 outl(BUILD_CMD(in1), 0xCF8);
210                 if (in2 == 1)                           /* Reading byte  */
211                         r9 = inb(0xCFC + ((REG_OFFSET(in1) & 3)));
212                 else if (in2 == 2)                      /* Reading word  */
213                         r9 = inw(0xCFC + ((REG_OFFSET(in1) & 2)));
214                 else                                    /* Reading dword */
215                         r9 = inl(0xCFC);
216                 status = PCIBIOS_SUCCESSFUL;
217         } else if (index == SAL_PCI_CONFIG_WRITE) {
218                 /*
219                  * in1 contains the PCI configuration address, in2 the
220                  * size of the write, and in3 the actual value to be
221                  * written out.
222                  */
223                 outl(BUILD_CMD(in1), 0xCF8);
224                 if (in2 == 1)                           /* Writing byte  */
225                         outb(in3, 0xCFC + ((REG_OFFSET(in1) & 3)));
226                 else if (in2 == 2)                      /* Writing word  */
227                         outw(in3, 0xCFC + ((REG_OFFSET(in1) & 2)));
228                 else                                    /* Writing dword */
229                         outl(in3, 0xCFC);
230                 status = PCIBIOS_SUCCESSFUL;
231 #endif /* CONFIG_PCI */
232         } else if (index == SAL_UPDATE_PAL) {
233                 ;
234         } else {
235                 status = -1;
236         }
237         return ((struct sal_ret_values) {status, r9, r10, r11});
238 }
239
240 struct ia64_boot_param *
241 sys_fw_init (const char *args, int arglen)
242 {
243         efi_system_table_t *efi_systab;
244         efi_runtime_services_t *efi_runtime;
245         efi_config_table_t *efi_tables;
246         struct ia64_sal_systab *sal_systab;
247         efi_memory_desc_t *efi_memmap, *md;
248         unsigned long *pal_desc, *sal_desc;
249         struct ia64_sal_desc_entry_point *sal_ed;
250         struct ia64_boot_param *bp;
251         unsigned char checksum = 0;
252         char *cp, *cmd_line;
253         int i = 0;
254 #       define MAKE_MD(typ, attr, start, end)           \
255         do {                                            \
256                 md = efi_memmap + i++;                  \
257                 md->type = typ;                         \
258                 md->pad = 0;                            \
259                 md->phys_addr = start;                  \
260                 md->virt_addr = 0;                      \
261                 md->num_pages = (end - start) >> 12;    \
262                 md->attribute = attr;                   \
263         } while (0)
264
265         memset(fw_mem, 0, sizeof(fw_mem));
266
267         pal_desc = (unsigned long *) &pal_emulator_static;
268         sal_desc = (unsigned long *) &sal_emulator;
269
270         cp = fw_mem;
271         efi_systab  = (void *) cp; cp += sizeof(*efi_systab);
272         efi_runtime = (void *) cp; cp += sizeof(*efi_runtime);
273         efi_tables  = (void *) cp; cp += sizeof(*efi_tables);
274         sal_systab  = (void *) cp; cp += sizeof(*sal_systab);
275         sal_ed      = (void *) cp; cp += sizeof(*sal_ed);
276         efi_memmap  = (void *) cp; cp += NUM_MEM_DESCS*sizeof(*efi_memmap);
277         bp          = (void *) cp; cp += sizeof(*bp);
278         cmd_line    = (void *) cp;
279
280         if (args) {
281                 if (arglen >= 1024)
282                         arglen = 1023;
283                 memcpy(cmd_line, args, arglen);
284         } else {
285                 arglen = 0;
286         }
287         cmd_line[arglen] = '\0';
288
289         memset(efi_systab, 0, sizeof(efi_systab));
290         efi_systab->hdr.signature = EFI_SYSTEM_TABLE_SIGNATURE;
291         efi_systab->hdr.revision  = EFI_SYSTEM_TABLE_REVISION;
292         efi_systab->hdr.headersize = sizeof(efi_systab->hdr);
293         efi_systab->fw_vendor = __pa("H\0e\0w\0l\0e\0t\0t\0-\0P\0a\0c\0k\0a\0r\0d\0\0");
294         efi_systab->fw_revision = 1;
295         efi_systab->runtime = (void *) __pa(efi_runtime);
296         efi_systab->nr_tables = 1;
297         efi_systab->tables = __pa(efi_tables);
298
299         efi_runtime->hdr.signature = EFI_RUNTIME_SERVICES_SIGNATURE;
300         efi_runtime->hdr.revision = EFI_RUNTIME_SERVICES_REVISION;
301         efi_runtime->hdr.headersize = sizeof(efi_runtime->hdr);
302         efi_runtime->get_time = __pa(&fw_efi_get_time);
303         efi_runtime->set_time = __pa(&efi_unimplemented);
304         efi_runtime->get_wakeup_time = __pa(&efi_unimplemented);
305         efi_runtime->set_wakeup_time = __pa(&efi_unimplemented);
306         efi_runtime->set_virtual_address_map = __pa(&efi_unimplemented);
307         efi_runtime->get_variable = __pa(&efi_unimplemented);
308         efi_runtime->get_next_variable = __pa(&efi_unimplemented);
309         efi_runtime->set_variable = __pa(&efi_unimplemented);
310         efi_runtime->get_next_high_mono_count = __pa(&efi_unimplemented);
311         efi_runtime->reset_system = __pa(&efi_reset_system);
312
313         efi_tables->guid = SAL_SYSTEM_TABLE_GUID;
314         efi_tables->table = __pa(sal_systab);
315
316         /* fill in the SAL system table: */
317         memcpy(sal_systab->signature, "SST_", 4);
318         sal_systab->size = sizeof(*sal_systab);
319         sal_systab->sal_rev_minor = 1;
320         sal_systab->sal_rev_major = 0;
321         sal_systab->entry_count = 1;
322
323 #ifdef CONFIG_IA64_GENERIC
324         strcpy(sal_systab->oem_id, "Generic");
325         strcpy(sal_systab->product_id, "IA-64 system");
326 #endif
327
328 #ifdef CONFIG_IA64_HP_SIM
329         strcpy(sal_systab->oem_id, "Hewlett-Packard");
330         strcpy(sal_systab->product_id, "HP-simulator");
331 #endif
332
333 #ifdef CONFIG_IA64_SDV
334         strcpy(sal_systab->oem_id, "Intel");
335         strcpy(sal_systab->product_id, "SDV");
336 #endif
337
338         /* fill in an entry point: */
339         sal_ed->type = SAL_DESC_ENTRY_POINT;
340         sal_ed->pal_proc = __pa(pal_desc[0]);
341         sal_ed->sal_proc = __pa(sal_desc[0]);
342         sal_ed->gp = __pa(sal_desc[1]);
343
344         for (cp = (char *) sal_systab; cp < (char *) efi_memmap; ++cp)
345                 checksum += *cp;
346
347         sal_systab->checksum = -checksum;
348
349 #if SIMPLE_MEMMAP
350         /* simulate free memory at physical address zero */
351         MAKE_MD(EFI_BOOT_SERVICES_DATA,         EFI_MEMORY_WB,    0*MB,    1*MB);
352         MAKE_MD(EFI_PAL_CODE,                   EFI_MEMORY_WB,    1*MB,    2*MB);
353         MAKE_MD(EFI_CONVENTIONAL_MEMORY,        EFI_MEMORY_WB,    2*MB,  130*MB);
354         MAKE_MD(EFI_CONVENTIONAL_MEMORY,        EFI_MEMORY_WB, 4096*MB, 4128*MB);
355 #else
356         MAKE_MD( 4,                0x9, 0x0000000000000000, 0x0000000000001000);
357         MAKE_MD( 7,                0x9, 0x0000000000001000, 0x000000000008a000);
358         MAKE_MD( 4,                0x9, 0x000000000008a000, 0x00000000000a0000);
359         MAKE_MD( 5, 0x8000000000000009, 0x00000000000c0000, 0x0000000000100000);
360         MAKE_MD( 7,                0x9, 0x0000000000100000, 0x0000000004400000);
361         MAKE_MD( 2,                0x9, 0x0000000004400000, 0x0000000004be5000);
362         MAKE_MD( 7,                0x9, 0x0000000004be5000, 0x000000007f77e000);
363         MAKE_MD( 6, 0x8000000000000009, 0x000000007f77e000, 0x000000007fb94000);
364         MAKE_MD( 6, 0x8000000000000009, 0x000000007fb94000, 0x000000007fb95000);
365         MAKE_MD( 6, 0x8000000000000009, 0x000000007fb95000, 0x000000007fc00000);
366         MAKE_MD(13, 0x8000000000000009, 0x000000007fc00000, 0x000000007fc3a000);
367         MAKE_MD( 7,                0x9, 0x000000007fc3a000, 0x000000007fea0000);
368         MAKE_MD( 5, 0x8000000000000009, 0x000000007fea0000, 0x000000007fea8000);
369         MAKE_MD( 7,                0x9, 0x000000007fea8000, 0x000000007feab000);
370         MAKE_MD( 5, 0x8000000000000009, 0x000000007feab000, 0x000000007ffff000);
371         MAKE_MD( 7,                0x9, 0x00000000ff400000, 0x0000000104000000);
372 #endif
373
374         bp->efi_systab = __pa(&fw_mem);
375         bp->efi_memmap = __pa(efi_memmap);
376         bp->efi_memmap_size = NUM_MEM_DESCS*sizeof(efi_memory_desc_t);
377         bp->efi_memdesc_size = sizeof(efi_memory_desc_t);
378         bp->efi_memdesc_version = 1;
379         bp->command_line = __pa(cmd_line);
380         bp->console_info.num_cols = 80;
381         bp->console_info.num_rows = 25;
382         bp->console_info.orig_x = 0;
383         bp->console_info.orig_y = 24;
384         bp->fpswa = 0;
385
386         return bp;
387 }