2 * This file is part of the coreboot project.
4 * Copyright (C) 2009 One Laptop per Child, Association, Inc.
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
21 * Part of this file is from cx700 port, part of is from cn700 port,
22 * and acpi_is_wakeup_early_via_VX800() is part of Rudolf's S3 patch.
25 #define RAMINIT_SYSINFO 1
26 #define CACHE_AS_RAM_ADDRESS_DEBUG 0
27 #define PAYLOAD_IS_SEABIOS 0
30 #include <device/pci_def.h>
31 #include <device/pci_ids.h>
33 #include <device/pnp_def.h>
34 #include <arch/romcc_io.h>
36 #include "pc80/serial.c"
37 #include "console/console.c"
38 #include "lib/ramtest.c"
39 #include "northbridge/via/vx800/vx800.h"
40 #include "cpu/x86/mtrr/earlymtrr.c"
41 #include "cpu/x86/bist.h"
42 #include "pc80/udelay_io.c"
43 #include "lib/delay.c"
46 /* This file contains the board-special SI value for raminit.c. */
47 #include "driving_clk_phase_data.c"
49 #include "northbridge/via/vx800/raminit.h"
50 #include "northbridge/via/vx800/raminit.c"
54 #include "superio/winbond/w83697hf/w83697hf_early_serial.c"
56 #define SERIAL_DEV PNP_DEV(0x2e, W83697HF_SP1)
59 * This acpi_is_wakeup_early_via_VX800 is from Rudolf's patch on the list:
60 * http://www.coreboot.org/pipermail/coreboot/2008-January/028787.html.
62 static int acpi_is_wakeup_early_via_vx800(void)
67 print_debug("In acpi_is_wakeup_early_via_vx800\n");
68 /* Power management controller */
69 dev = pci_locate_device(PCI_ID(PCI_VENDOR_ID_VIA,
70 PCI_DEVICE_ID_VIA_VX855_LPC), 0);
72 if (dev == PCI_DEV_INVALID)
73 die("Power management controller not found\n");
75 /* Set ACPI base address to I/O VX800_ACPI_IO_BASE. */
76 pci_write_config16(dev, 0x88, VX800_ACPI_IO_BASE | 0x1);
78 /* Enable ACPI accessm RTC signal gated with PSON. */
79 pci_write_config8(dev, 0x81, 0x84);
81 tmp = inw(VX800_ACPI_IO_BASE + 0x04);
82 result = ((tmp & (7 << 10)) >> 10) == 1 ? 3 : 0;
83 print_debug(" boot_mode=");
84 print_debug_hex16(result);
89 /* All content of this function came from the cx700 port of coreboot. */
90 static void enable_mainboard_devices(void)
95 * Add and close this switch, since some line cause error, some
96 * written at elsewhere (stage1 stage2).
99 dev = pci_locate_device(PCI_ID(PCI_VENDOR_ID_VIA,
100 PCI_DEVICE_ID_VIA_VX855_LPC), 0);
103 pci_write_config8(dev, 0x98, 0x00);
105 pci_write_config8(dev, 0x50, 0x80); /* Disable mc97. */
108 * Martin: Disable internal KBC configuration.
110 * Internal Config is needed to decide which key can be pressed to
113 pci_write_config8(dev, 0x51, 0x2d);
115 /* This causes irq0 can not be triggerd, since bit 5 was set to 0. */
116 /* pci_write_config8(dev, 0x58, 0x42); */
118 /* These writing may... TODO */
119 regdata = pci_read_config8(dev, 0x58);
121 pci_write_config8(dev, 0x58, regdata);
122 pci_write_config8(dev, 0x59, 0x80);
123 pci_write_config8(dev, 0x5b, 0x01);
126 print_debug("In enable_mainboard_devices \n");
128 /* Enable P2P Bridge Header for external PCI bus. */
129 dev = pci_locate_device(PCI_ID(0x1106, 0xa353), 0);
130 pci_write_config8(dev, 0x4f, 0x41);
133 * "5324" already is the default value of the PCI IDE device, cancel
136 * [william 20080124]: Fix bug that can not boot Ubuntu at the
141 dev = pci_locate_device(PCI_ID(0x1106, PCI_DEVICE_ID_VIA_VX855_IDE), 0);
144 values = pci_read_config16(dev, 0xBA);
147 pci_write_config16(dev, 0xBA, values);
152 * Most content of this function came from the cx700 port of coreboot.
153 * Turn on the shadow of E-seg.
155 static void enable_shadow_ram(void)
160 * Changed the value from 0x2a to 0x3f. "read only" may block "write"?
161 * and maybe in C-seg "write" will be needed?
163 pci_write_config8(PCI_DEV(0, 0, 3), 0x80, 0xff);
165 /* 0xf0000-0xfffff - ACPI tables */
166 shadowreg = pci_read_config8(PCI_DEV(0, 0, 3), 0x83);
168 pci_write_config8(PCI_DEV(0, 0, 3), 0x83, shadowreg);
170 /* 0xe0000-0xeffff - elfload? */
172 * In s3 resume process, wakeup.c, I use E-seg to hold the code
173 * (which can not locate in the area to be covered) that will copy
174 * 0-A-seg and F-seg from TOP-mem back to their normal location.
176 pci_write_config8(PCI_DEV(0, 0, 3), 0x82, 0xff);
179 /* Enable shadow RAM as normal DRAM */
180 /* 0xc0000-0xcffff - VGA BIOS */
181 pci_write_config8(PCI_DEV(0, 0, 3), 0x80, 0x2a);
182 pci_write_config8(PCI_DEV(0, 0, 7), 0x61, 0x00);
183 /* 0xd0000-0xdffff - ?? */
184 /* pci_write_config8(PCI_DEV(0, 0, 3), 0x81, 0xff); */
185 /* pci_write_config8(PCI_DEV(0, 0, 7), 0x62, 0xff); */
187 /* Do it again for the vlink controller. */
188 shadowreg = pci_read_config8(PCI_DEV(0, 0, 7), 0x63);
190 pci_write_config8(PCI_DEV(0, 0, 7), 0x63, shadowreg);
195 * Added this table 2008-11-28.
196 * This table contains the value needed to be set before begin to init DRAM.
197 * Note: REV_Bx should be checked for changes when porting a new board!
199 static const struct VIA_PCI_REG_INIT_TABLE mNbStage1InitTbl[] = {
200 /* VT3409 no PCI-E */
201 { 0x00, 0xFF, NB_APIC_REG(0x61), 0xFF, 0x0E }, // Set Exxxxxxx as pcie mmio config range
202 { 0x00, 0xFF, NB_APIC_REG(0x60), 0xF4, 0x0B }, // Support extended cfg address of pcie
203 // {Â 0x00, 0xFF, NB_APIC_REG(0x42), 0xF9, 0x02 }, // APIC Interrupt((BT_INTR)) Control
204 // Set ROMSIP value by software
207 { 0x00, 0xFF, NB_HOST_REG(0x70), 0x77, 0x33 }, // 2x Host Adr Strobe/Pad Pullup Driving = 3
208 { 0x00, 0xFF, NB_HOST_REG(0x71), 0x77, 0x33 }, // 2x Host Adr Strobe/Pad Pulldown Driving = 3
209 { 0x00, 0xFF, NB_HOST_REG(0x72), 0x77, 0x33 }, // 4x Host Dat Strobe/Pad Pullup Driving = 3
210 { 0x00, 0xFF, NB_HOST_REG(0x73), 0x77, 0x33 }, // 4x Host Dat Strobe/Pad Pulldown Driving = 3
211 { 0x00, 0xFF, NB_HOST_REG(0x74), 0xFF, 0x21 }, // Memory I/F timing ctrl
212 { 0x00, 0xFF, NB_HOST_REG(0x74), 0xFF, 0xE1 }, // Memory I/F timing ctrl
213 { 0x00, 0xFF, NB_HOST_REG(0x75), 0xFF, 0x18 }, // AGTL+ I/O Circuit
214 { 0x00, 0xFF, NB_HOST_REG(0x76), 0xFB, 0x0C }, // AGTL+ Compensation Status
215 { 0x00, 0xFF, NB_HOST_REG(0x78), 0xFF, 0x33 }, // 2X AGTL+ Auto Compensation Offset
216 { 0x00, 0xFF, NB_HOST_REG(0x79), 0xFF, 0x33 }, // 4X AGTL+ Auto Compensation Offset
217 { 0x00, 0xFF, NB_HOST_REG(0x7A), 0x3F, 0x72 }, // AGTL Compensation Status
218 { 0x00, 0xFF, NB_HOST_REG(0x7A), 0x3F, 0x77 }, // AGTL Compensation Status
219 { 0x00, 0xFF, NB_HOST_REG(0x7B), 0xFF, 0x44 }, // Input Host Address / Host Strobe Delay Control for HA Group
220 { 0x00, 0xFF, NB_HOST_REG(0x7B), 0xFF, 0x22 }, // Input Host Address / Host Strobe Delay Control for HA Group
221 { 0x00, 0xFF, NB_HOST_REG(0x7C), 0xFF, 0x00 }, // Output Delay Control of PAD for HA Group
222 { 0x00, 0xFF, NB_HOST_REG(0x7D), 0xFF, 0xAA }, // Host Address / Address Clock Output Delay Control (Only for P4 Bus)
223 { 0x00, 0xFF, NB_HOST_REG(0x7E), 0xFF, 0x10 }, // Host Address CKG Rising / Falling Time Control (Only for P4 Bus)
224 { 0x00, 0xFF, NB_HOST_REG(0x7E), 0xFF, 0x40 }, // Host Address CKG Rising / Falling Time Control (Only for P4 Bus)
225 { 0x00, 0xFF, NB_HOST_REG(0x7F), 0xFF, 0x10 }, // Host Address CKG Rising / Falling Time Control (Only for P4 Bus)
226 { 0x00, 0xFF, NB_HOST_REG(0x7F), 0xFF, 0x40 }, // Host Address CKG Rising / Falling Time Control (Only for P4 Bus)
227 { 0x00, 0xFF, NB_HOST_REG(0x80), 0x3F, 0x44 }, // Host Data Receiving Strobe Delay Ctrl 1
228 { 0x00, 0xFF, NB_HOST_REG(0x81), 0xFF, 0x44 }, // Host Data Receiving Strobe Delay Ctrl 2
229 { 0x00, 0xFF, NB_HOST_REG(0x82), 0xFF, 0x00 }, // Output Delay of PAD for HDSTB
230 { 0x00, 0xFF, NB_HOST_REG(0x83), 0xFF, 0x00 }, // Output Delay of PAD for HD
231 { 0x00, 0xFF, NB_HOST_REG(0x84), 0xFF, 0x44 }, // Host Data / Strobe CKG Control (Group 0)
232 { 0x00, 0xFF, NB_HOST_REG(0x85), 0xFF, 0x44 }, // Host Data / Strobe CKG Control (Group 1)
233 { 0x00, 0xFF, NB_HOST_REG(0x86), 0xFF, 0x44 }, // Host Data / Strobe CKG Control (Group 2)
234 { 0x00, 0xFF, NB_HOST_REG(0x87), 0xFF, 0x44 }, // Host Data / Strobe CKG Control (Group 3)
237 // CPU Host Bus Control
238 { 0x00, 0xFF, NB_HOST_REG(0x50), 0x1F, 0x08 }, // Request phase ctrl: Dynamic Defer Snoop Stall Count = 8
239 // { 0x00, 0xFF, NB_HOST_REG(0x51), 0xFF, 0x7F }, // CPU I/F Ctrl-1: Disable Fast DRDY and RAW
240 { 0x00, 0xFF, NB_HOST_REG(0x51), 0xFF, 0x7C }, // CPU I/F Ctrl-1: Disable Fast DRDY and RAW
241 { 0x00, 0xFF, NB_HOST_REG(0x52), 0xCB, 0xCB }, // CPU I/F Ctrl-2: Enable all for performance
242 // { 0x00, 0xFF, NB_HOST_REG(0x53), 0xFF, 0x88 }, // Arbitration: Host/Master Occupancy timer = 8*4 HCLK
243 { 0x00, 0xFF, NB_HOST_REG(0x53), 0xFF, 0x44 }, // Arbitration: Host/Master Occupancy timer = 4*4 HCLK
244 { 0x00, 0xFF, NB_HOST_REG(0x54), 0x1E, 0x1C }, // Misc Ctrl: Enable 8QW burst Mem Access
245 // { 0x00, 0xFF, NB_HOST_REG(0x55), 0x06, 0x06 }, // Miscellaneous Control 2
246 { 0x00, 0xFF, NB_HOST_REG(0x55), 0x06, 0x04 }, // Miscellaneous Control 2
247 { 0x00, 0xFF, NB_HOST_REG(0x56), 0xF7, 0x63 }, // Write Policy 1
248 // { 0x00, 0xFF, NB_HOST_REG(0x59), 0x3D, 0x01 }, // CPU Miscellaneous Control 1, enable Lowest-Priority IPL
249 // { 0x00, 0xFF, NB_HOST_REG(0x5c), 0xFF, 0x00 }, // CPU Miscellaneous Control 2
250 { 0x00, 0xFF, NB_HOST_REG(0x5D), 0xFF, 0xA2 }, // Write Policy
251 { 0x00, 0xFF, NB_HOST_REG(0x5E), 0xFF, 0x88 }, // Bandwidth Timer
252 { 0x00, 0xFF, NB_HOST_REG(0x5F), 0x46, 0x46 }, // CPU Misc Ctrl
253 // { 0x00, 0xFF, NB_HOST_REG(0x90), 0xFF, 0x0B }, // CPU Miscellaneous Control 3
254 // { 0x00, 0xFF, NB_HOST_REG(0x96), 0x0B, 0x0B }, // CPU Miscellaneous Control 2
255 { 0x00, 0xFF, NB_HOST_REG(0x96), 0x0B, 0x0A }, // CPU Miscellaneous Control 2
256 { 0x00, 0xFF, NB_HOST_REG(0x98), 0xC1, 0x41 }, // CPU Miscellaneous Control 3
257 { 0x00, 0xFF, NB_HOST_REG(0x99), 0x0E, 0x06 }, // CPU Miscellaneous Control 4
259 // Set APIC and SMRAM
260 { 0x00, 0xFF, NB_HOST_REG(0x97), 0xFF, 0x00 }, // APIC Related Control
261 { 0x00, 0xFF, NB_DRAMC_REG(0x86), 0xD6, 0x29 }, // SMM and APIC Decoding: enable APIC, MSI and SMRAM A-Seg
262 { 0x00, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } // End of the table
265 #define USE_VCP 1 /* 0 means "use DVP". */
269 #define gCom1Base 0x3f8
270 #define gCom2Base 0x2f8
273 static void EmbedComInit(void)
278 /* Enable NB multiple function control. */
279 ByteVal = pci_read_config8(PCI_DEV(0, 0, 0), 0x4f);
280 ByteVal = ByteVal | 0x01;
281 pci_write_config8(PCI_DEV(0, 0, 0), 0x4f, ByteVal);
284 ByteVal = pci_read_config8(PCI_DEV(0, 0, 3), 0xA1);
285 ByteVal = ByteVal | 0x80;
286 pci_write_config8(PCI_DEV(0, 0, 3), 0xA1, ByteVal);
288 ByteVal = pci_read_config8(PCI_DEV(0, 0, 3), 0xA7);
289 ByteVal = ByteVal | 0x08;
290 pci_write_config8(PCI_DEV(0, 0, 3), 0xA7, ByteVal);
292 /* Enable P2P IO/mem. */
293 ByteVal = pci_read_config8(PCI_DEV(0, 1, 0), 0x4);
294 ByteVal = ByteVal | 0x07;
295 pci_write_config8(PCI_DEV(0, 1, 0), 0x4, ByteVal);
297 /* Turn on graphic chip I/O port port access. */
298 ByteVal = inb(0x3C3);
299 ByteVal = ByteVal | 0x01;
300 outb(ByteVal, 0x3C3);
302 /* Turn off graphic chip register protection. */
304 ByteVal = inb(0x3C5);
305 ByteVal = ByteVal | 0x01;
306 outb(ByteVal, 0x3C5);
308 /* South module pad share enable 0x3C5.78[7]. */
310 ByteVal = inb(0x3C5);
311 ByteVal = ByteVal | 0x80;
312 outb(ByteVal, 0x3C5);
314 /* Enable UART function multiplex with DVP or VCP pad D17F0Rx46[7,6]. */
315 ByteVal = pci_read_config8(PCI_DEV(0, 17, 0), 0x46);
317 ByteVal = (ByteVal & 0x3F) | 0x40; /* Multiplex with VCP. */
319 ByteVal = (ByteVal & 0x3F) | 0xC0; /* Multiplex with DVP. */
320 pci_write_config8(PCI_DEV(0, 17, 0), 0x46, ByteVal);
322 /* Enable embedded COM1 and COM2 D17F0RxB0[5,4]. */
323 ByteVal = pci_read_config8(PCI_DEV(0, 17, 0), 0xB0);
324 ByteVal = ByteVal & 0xcf;
325 /* Multiplex with VCP. */
327 ByteVal = ByteVal | 0x10;
329 ByteVal = ByteVal | 0x20;
330 pci_write_config8(PCI_DEV(0, 17, 0), 0xB0, ByteVal);
339 /* Set embedded COM1 I/O base = 0x3E8 (D17F0RB4, ByteVal = 0xFD) */
341 ByteVal = (u8) ((gCom1Base >> 3) | 0x80);
342 pci_write_config8(PCI_DEV(0, 17, 0), 0xB4, ByteVal);
343 ByteVal = pci_read_config8(PCI_DEV(0, 17, 0), 0xb2);
344 ByteVal = (ByteVal & 0xf0) | 0x04;
345 pci_write_config8(PCI_DEV(0, 17, 0), 0xB2, ByteVal);
348 /* Set embedded COM2 I/O base = 0x2E8 (D17F0RB5, ByteVal = 0xDD). */
350 ByteVal = (u8) ((gCom2Base >> 3) | 0x80);
351 pci_write_config8(PCI_DEV(0, 17, 0), 0xB5, ByteVal);
352 ByteVal = pci_read_config8(PCI_DEV(0, 17, 0), 0xb2);
353 ByteVal = (ByteVal & 0x0f) | 0x30;
354 pci_write_config8(PCI_DEV(0, 17, 0), 0xB2, ByteVal);
356 /* No port 80 biger then 0x10. */
358 /* Disable interrupt. */
359 ByteVal = inb(ComBase + 3);
360 outb(ByteVal & 0x7F, ComBase + 3);
361 outb(0x00, ComBase + 1);
364 ByteVal = inb(ComBase + 3);
365 outb(ByteVal | 0x80, ComBase + 3);
367 outb(0x00, ComBase + 1);
369 /* Set frame format. */
370 ByteVal = inb(ComBase + 3);
371 outb(ByteVal & 0x3F, ComBase + 3);
372 outb(0x03, ComBase + 3);
373 outb(0x00, ComBase + 2);
374 outb(0x00, ComBase + 4);
376 /* SOutput("Embedded COM output\n"); */
381 /* cache_as_ram.inc jumps to here. */
382 void main(unsigned long bist)
385 u8 rambits, Data8, Data;
390 * Enable multifunction for northbridge. These 4 lines (until
391 * console_init()) are the same with epia-cn port.
393 pci_write_config8(PCI_DEV(0, 0, 0), 0x4f, 0x01);
394 /* EmbedComInit(); */
395 w83697hf_set_clksel_48(SERIAL_DEV);
396 w83697hf_enable_serial(SERIAL_DEV, CONFIG_TTYS0_BASE);
398 /* enable_vx800_serial(); */
418 pci_write_config16(PCI_DEV(0, 0xf, 0), 0xBA,
419 PCI_DEVICE_ID_VIA_VX855_IDE);
420 pci_write_config16(PCI_DEV(0, 0xf, 0), 0xBE,
421 PCI_DEVICE_ID_VIA_VX855_IDE);
422 pci_write_config16(PCI_DEV(0, 0x11, 0), 0xA0, PCI_VENDOR_ID_VIA);
423 pci_write_config16(PCI_DEV(0, 0x11, 0), 0xA2,
424 PCI_DEVICE_ID_VIA_VX855_LPC);
425 Data8 = pci_read_config8(PCI_DEV(0, 0x11, 0), 0x79);
428 pci_write_config8(PCI_DEV(0, 0x11, 0), 0x79, Data8);
429 pci_write_config16(PCI_DEV(0, 0x11, 0), 0x72,
430 PCI_DEVICE_ID_VIA_VX855_LPC);
433 * There are two function definitions of console_init(), while the
434 * src/arch/i386/lib is the right one.
438 /* Decide if this is a s3 wakeup or a normal boot. */
439 boot_mode = acpi_is_wakeup_early_via_vx800();
442 * 2008-11-27 Add this, to transfer "cpu restart" to "cold boot".
443 * When this boot is not a S3 resume, and PCI registers had been
444 * written, then this must be a CPU restart (result of OS reboot cmd),
445 * so we need a real "cold boot".
448 && (pci_read_config8(PCI_DEV(0, 0, 3), 0x80) != 0)) {
452 /* x86 cold boot I/O cmd. */
453 /* These 2 lines are the same with epia-cn port. */
456 /* This fix does help vx800!, but vx855 doesn't need this. */
457 /* smbus_fixup(&ctrl); */
461 * CAR needs MTRR until memory is ok, so disable this
462 * early_mtrr_init() call.
465 print_debug("doing early_mtrr\n");
470 /* Halt if there was a built-in self test failure. */
471 report_bist_failure(bist);
473 print_debug("Enabling mainboard devices\n");
474 enable_mainboard_devices();
477 * Get NB chip revision from D0F4RxF6, revision will be used in
480 device = PCI_DEV(0, 0, 4);
481 Data = pci_read_config8(device, 0xf6);
482 print_debug("NB chip revision =");
483 print_debug_hex8(Data);
486 /* Make NB ready before DRAM init. */
487 via_pci_inittable(Data, mNbStage1InitTbl);
490 * When resume from s3, DRAM init is skipped, so need to recovery
491 * any PCI register related to DRAM init. d0f3 didn't lose its power
492 * during whole s3 time, so any register not belonging to d0f3 needs
496 if (boot_mode == 3) {
498 u8 ramregs[] = { 0x43, 0x42, 0x41, 0x40 };
499 DRAM_SYS_ATTR DramAttr;
501 print_debug("This is an S3 wakeup\n");
503 memset(&DramAttr, 0, sizeof(DRAM_SYS_ATTR));
505 * Step 1: DRAM detection; DDR1 or DDR2; Get SPD Data;
506 * Rank Presence; 64 or 128bit; Unbuffered or registered;
509 DRAMDetect(&DramAttr);
512 * Begin to get RAM size, 43,42 41 40 contains the end
513 * address of last rank in DDR2 slot.
515 device = PCI_DEV(0, 0, 3);
516 for (rambits = 0, i = 0; i < ARRAY_SIZE(ramregs); i++) {
517 rambits = pci_read_config8(device, ramregs[i]);
522 DRAMDRDYSetting(&DramAttr);
524 Data = 0x80; /* This value is same with DevInit.c. */
525 pci_write_config8(PCI_DEV(0, 0, 4), 0xa3, Data);
526 pci_write_config8(PCI_DEV(0, 17, 7), 0x60, rambits << 2);
527 Data = pci_read_config8(MEMCTRL, 0x88);
528 pci_write_config8(PCI_DEV(0, 17, 7), 0xE5, Data);
530 /* Just copy this function from draminit to here! */
531 DRAMRegFinalValue(&DramAttr);
533 /* Just copy this function from draminit to here! */
536 print_debug("Resume from S3, RAM init was ignored\n");
539 ram_check(0, 640 * 1024);
543 /* ddr2_ram_setup(); */
544 /* This line is the same with cx700 port. */
548 * For coreboot most time of S3 resume is the same as normal boot,
549 * so some memory area under 1M become dirty, so before this happen,
550 * I need to backup the content of mem to top-mem.
552 * I will reserve the 1M top-men in LBIO table in coreboot_table.c
553 * and recovery the content of 1M-mem in wakeup.c.
555 #if PAYLOAD_IS_SEABIOS == 1
556 if (boot_mode == 3) {
557 /* An idea of Libo.Feng at amd.com in http://www.coreboot.org/pipermail/coreboot/2008-December/043111.html
559 * I want move the 1M data, I have to set some MTRRs myself.
560 * Setting MTRR before back memory save s3 resume time about
563 * !!! Since CAR stack uses cache, and we are using cache
564 * here, we must be careful:
566 * 1. during this MTRR code, must no function call (after
567 * this MTRR, I think it should be OK to use function).
568 * 2. Before stack switch, no use variable that have value
570 * 3. Due to 2, take care of "cpu_reset", I directlly set it
573 u32 memtop = *(u32 *) WAKE_MEM_INFO;
574 u32 memtop1 = *(u32 *) WAKE_MEM_INFO - 0x100000;
575 u32 memtop2 = *(u32 *) WAKE_MEM_INFO - 0x200000;
576 u32 memtop3 = *(u32 *) WAKE_MEM_INFO - 64 * 1024 - 0x100000;
578 *(u32 *) WAKE_MEM_INFO - 64 * 1024 - 0x100000 + 0xe0000;
581 "movl $0x204, %%ecx\n\t"
582 "xorl %%edx, %%edx\n\t"
584 "orl $(0 | 6), %%eax\n\t"
587 "movl $0x205, %%ecx\n\t"
588 "xorl %%edx, %%edx\n\t"
589 "movl $0x100000,%%eax\n\t"
592 "orl $(0 | 0x800), %%eax\n\t"
598 "movl $0x206, %%ecx\n\t"
599 "xorl %%edx, %%edx\n\t"
601 "orl $(0 | 6), %%eax\n\t"
604 "movl $0x207, %%ecx\n\t"
605 "xorl %%edx, %%edx\n\t"
606 "movl $0x100000,%%eax\n\t"
609 "orl $(0 | 0x800), %%eax\n\t"
615 "movl $0x208, %ecx\n\t"
616 "xorl %edx, %edx\n\t"
618 "orl $(0 | 6), %eax\n\t"
621 "movl $0x209, %ecx\n\t"
622 "xorl %edx, %edx\n\t"
623 "movl $0x100000,%eax\n\t"
626 "orl $(0 | 0x800), %eax\n\t"
632 * WAKE_MEM_INFO is inited in get_set_top_available_mem()
633 * in tables.c these two memcpy() not not be enabled if set
634 * the MTRR around this two lines.
640 "movl $0xa0000, %%ecx\n\t"
647 "movl $0xe0000, %%esi\n\t"
649 "movl $0x20000, %%ecx\n\t"
655 /* This can have function call, because no variable used before this. */
656 print_debug("Copy memory to high memory to protect s3 wakeup vector code \n");
657 memcpy((unsigned char *)((*(u32 *) WAKE_MEM_INFO) - 64 * 1024 -
658 0x100000), (unsigned char *)0, 0xa0000);
659 memcpy((unsigned char *)((*(u32 *) WAKE_MEM_INFO) - 64 * 1024 -
660 0x100000 + 0xe0000), (unsigned char *)0xe0000, 0x20000);
662 /* Restore the MTRR previously modified. */
666 "xorl %edx, %edx\n\t"
667 "xorl %eax, %eax\n\t"
668 "movl $0x204, %ecx\n\t"
670 "movl $0x205, %ecx\n\t"
672 "movl $0x206, %ecx\n\t"
674 "movl $0x207, %ecx\n\t"
676 "movl $0x208, %ecx\n\t"
678 "movl $0x209, %ecx\n\t"