2 * This file is part of the coreboot project.
4 * Copyright (C) 2009 Rudolf Marek <r.marek@assembler.cz>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; version 2 of the License.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 /* how many nesting we support */
21 #define ACPIGEN_LENSTACK_SIZE 10
23 /* if you need to change this, change the acpigen_write_f and
26 #define ACPIGEN_MAXLEN 0xfff
29 #include <arch/acpigen.h>
30 #include <console/console.h>
32 static char *gencurrent;
34 char *len_stack[ACPIGEN_LENSTACK_SIZE];
37 static int acpigen_write_len_f(void)
39 ASSERT(ltop < (ACPIGEN_LENSTACK_SIZE - 1))
40 len_stack[ltop++] = gencurrent;
46 void acpigen_patch_len(int len)
48 ASSERT(len <= ACPIGEN_MAXLEN)
50 char *p = len_stack[--ltop];
51 /* generate store length for 0xfff max */
52 p[0] = (0x40 | (len & 0xf));
53 p[1] = (len >> 4 & 0xff);
57 void acpigen_set_current(char *curr)
62 char *acpigen_get_current(void)
67 int acpigen_emit_byte(unsigned char b)
73 int acpigen_write_package(int nr_el)
77 acpigen_emit_byte(0x12);
78 len = acpigen_write_len_f();
79 acpigen_emit_byte(nr_el);
83 int acpigen_write_byte(unsigned int data)
86 acpigen_emit_byte(0xa);
87 acpigen_emit_byte(data & 0xff);
91 int acpigen_write_dword(unsigned int data)
94 acpigen_emit_byte(0xc);
95 acpigen_emit_byte(data & 0xff);
96 acpigen_emit_byte((data >> 8) & 0xff);
97 acpigen_emit_byte((data >> 16) & 0xff);
98 acpigen_emit_byte((data >> 24) & 0xff);
102 int acpigen_write_qword(uint64_t data)
105 acpigen_emit_byte(0xe);
106 acpigen_emit_byte(data & 0xff);
107 acpigen_emit_byte((data >> 8) & 0xff);
108 acpigen_emit_byte((data >> 16) & 0xff);
109 acpigen_emit_byte((data >> 24) & 0xff);
110 acpigen_emit_byte((data >> 32) & 0xff);
111 acpigen_emit_byte((data >> 40) & 0xff);
112 acpigen_emit_byte((data >> 48) & 0xff);
113 acpigen_emit_byte((data >> 56) & 0xff);
117 int acpigen_write_name_byte(const char *name, uint8_t val)
120 len = acpigen_write_name(name);
121 len += acpigen_write_byte(val);
125 int acpigen_write_name_dword(const char *name, uint32_t val)
128 len = acpigen_write_name(name);
129 len += acpigen_write_dword(val);
133 int acpigen_write_name_qword(const char *name, uint64_t val)
136 len = acpigen_write_name(name);
137 len += acpigen_write_qword(val);
141 int acpigen_emit_stream(const char *data, int size)
144 for (i = 0; i < size; i++) {
145 acpigen_emit_byte(data[i]);
150 /* The NameString are bit tricky, each element can be 4 chars, if
151 less its padded with underscore. Check 18.2.2 and 18.4
152 and 5.3 of ACPI specs 3.0 for details
155 static int acpigen_emit_simple_namestring(const char *name) {
158 for (i = 0; i < 4; i++) {
159 if ((name[i] == '\0') || (name[i] == '.')) {
160 len += acpigen_emit_stream(ud, 4 - i);
163 len += acpigen_emit_byte(name[i]);
169 static int acpigen_emit_double_namestring(const char *name, int dotpos) {
171 /* mark dual name prefix */
172 len += acpigen_emit_byte(0x2e);
173 len += acpigen_emit_simple_namestring(name);
174 len += acpigen_emit_simple_namestring(&name[dotpos + 1]);
178 static int acpigen_emit_multi_namestring(const char *name) {
179 int len = 0, count = 0;
180 unsigned char *pathlen;
181 /* mark multi name prefix */
182 len += acpigen_emit_byte(0x2f);
183 len += acpigen_emit_byte(0x0);
184 pathlen = ((unsigned char *) acpigen_get_current()) - 1;
186 while (name[0] != '\0') {
187 len += acpigen_emit_simple_namestring(name);
188 /* find end or next entity */
189 while ((name[0] != '.') && (name[0] != '\0'))
191 /* forward to next */
202 int acpigen_emit_namestring(const char *namepath) {
207 /* we can start with a \ */
208 if (namepath[0] == '\\') {
209 len += acpigen_emit_byte('\\');
213 /* and there can be any number of ^ */
214 while (namepath[0] == '^') {
215 len += acpigen_emit_byte('^');
219 ASSERT(namepath[0] != '\0');
222 while (namepath[i] != '\0') {
223 if (namepath[i] == '.') {
231 len += acpigen_emit_simple_namestring(namepath);
232 } else if (dotcount == 1) {
233 len += acpigen_emit_double_namestring(namepath, dotpos);
235 len += acpigen_emit_multi_namestring(namepath);
240 int acpigen_write_name(const char *name)
244 len = acpigen_emit_byte(0x8);
245 return len + acpigen_emit_namestring(name);
248 int acpigen_write_scope(const char *name)
252 len = acpigen_emit_byte(0x10);
253 len += acpigen_write_len_f();
254 return len + acpigen_emit_namestring(name);
257 int acpigen_write_processor(u8 cpuindex, u32 pblock_addr, u8 pblock_len)
260 Processor (\_PR.CPUcpuindex, cpuindex, pblock_addr, pblock_len)
266 acpigen_emit_byte(0x5b);
267 acpigen_emit_byte(0x83);
268 len = acpigen_write_len_f();
270 sprintf(pscope, "\\_PR.CPU%x", (unsigned int) cpuindex);
271 len += acpigen_emit_namestring(pscope);
272 acpigen_emit_byte(cpuindex);
273 acpigen_emit_byte(pblock_addr & 0xff);
274 acpigen_emit_byte((pblock_addr >> 8) & 0xff);
275 acpigen_emit_byte((pblock_addr >> 16) & 0xff);
276 acpigen_emit_byte((pblock_addr >> 24) & 0xff);
277 acpigen_emit_byte(pblock_len);
281 int acpigen_write_empty_PCT(void)
284 Name (_PCT, Package (0x02)
291 0x0000000000000000, // Address
300 0x0000000000000000, // Address
305 static char stream[] = {
306 0x08, 0x5F, 0x50, 0x43, 0x54, 0x12, 0x2C, /* 00000030 "0._PCT.," */
307 0x02, 0x11, 0x14, 0x0A, 0x11, 0x82, 0x0C, 0x00, /* 00000038 "........" */
308 0x7F, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 00000040 "........" */
309 0x00, 0x00, 0x00, 0x00, 0x79, 0x00, 0x11, 0x14, /* 00000048 "....y..." */
310 0x0A, 0x11, 0x82, 0x0C, 0x00, 0x7F, 0x00, 0x00, /* 00000050 "........" */
311 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 00000058 "........" */
314 return acpigen_emit_stream(stream, ARRAY_SIZE(stream));
317 /* generates a func with max supported P states */
318 int acpigen_write_PPC(u8 nr)
321 Method (_PPC, 0, NotSerialized)
328 acpigen_emit_byte(0x14);
329 len = acpigen_write_len_f();
330 len += acpigen_emit_namestring("_PPC");
332 acpigen_emit_byte(0x00);
334 acpigen_emit_byte(0xa4);
336 len += acpigen_write_byte(nr);
337 /* add all single bytes */
339 acpigen_patch_len(len - 1);
343 int acpigen_write_PSS_package(u32 coreFreq, u32 power, u32 transLat,
344 u32 busmLat, u32 control, u32 status)
347 len = acpigen_write_package(6);
348 len += acpigen_write_dword(coreFreq);
349 len += acpigen_write_dword(power);
350 len += acpigen_write_dword(transLat);
351 len += acpigen_write_dword(busmLat);
352 len += acpigen_write_dword(control);
353 len += acpigen_write_dword(status);
354 //pkglen without the len opcode
355 acpigen_patch_len(len - 1);
359 int acpigen_write_PSD_package(u32 domain, u32 numprocs, PSD_coord coordtype)
362 lenh = acpigen_write_name("_PSD");
363 lenp = acpigen_write_package(1);
364 len = acpigen_write_package(5);
365 len += acpigen_write_byte(5); // 5 values
366 len += acpigen_write_byte(0); // revision 0
367 len += acpigen_write_dword(domain);
368 len += acpigen_write_dword(coordtype);
369 len += acpigen_write_dword(numprocs);
370 acpigen_patch_len(len - 1);
372 acpigen_patch_len(len - 1);