2 * This file is part of the coreboot project.
4 * Copyright (C) 2007 Advanced Micro Devices, Inc.
5 * Copyright (C) 2009-2010 coresystems GmbH
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; version 2 of the License.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
21 #include <device/pci.h>
25 #include <arch/registers.h>
26 #include <console/console.h>
27 #include <arch/interrupt.h>
30 #include <pc80/i8259.h>
33 #include "../../src/lib/jpeg.h"
35 void (*realmode_call)(u32 addr, u32 eax, u32 ebx, u32 ecx, u32 edx,
36 u32 esi, u32 edi) __attribute__((regparm(0))) =
37 (void *)&__realmode_call;
39 void (*realmode_interrupt)(u32 intno, u32 eax, u32 ebx, u32 ecx, u32 edx,
40 u32 esi, u32 edi) __attribute__((regparm(0))) =
41 (void *)&__realmode_interrupt;
43 static void setup_bda(void)
45 /* clear BIOS DATA AREA */
46 memset((void *)0x400, 0, 0x200);
48 write16(0x413, FAKE_MEMORY_SIZE / 1024);
49 write16(0x40e, INITIAL_EBDA_SEGMENT);
52 memset((void *)(INITIAL_EBDA_SEGMENT << 4), 0, INITIAL_EBDA_SIZE);
53 write16((INITIAL_EBDA_SEGMENT << 4) + 0x0, INITIAL_EBDA_SIZE / 1024);
56 static void setup_rombios(void)
58 const char date[] = "06/11/99";
59 memcpy((void *)0xffff5, &date, 8);
61 const char ident[] = "PCI_ISA";
62 memcpy((void *)0xfffd9, &ident, 7);
64 /* system model: IBM-AT */
65 write8(0xffffe, 0xfc);
68 int (*intXX_handler[256])(struct eregs *regs) = { NULL };
70 static int intXX_exception_handler(struct eregs *regs)
72 printk(BIOS_INFO, "Oops, exception %d while executing option rom\n",
74 x86_exception(regs); // Call coreboot exception handler
76 return 0; // Never really returns
79 static int intXX_unknown_handler(struct eregs *regs)
81 printk(BIOS_INFO, "Unsupported software interrupt #0x%x eax 0x%x\n",
82 regs->vector, regs->eax);
87 /* setup interrupt handlers for mainboard */
88 void mainboard_interrupt_handlers(int intXX, void *intXX_func)
90 intXX_handler[intXX] = intXX_func;
93 static void setup_interrupt_handlers(void)
97 /* The first 16 intXX functions are not BIOS services,
98 * but the CPU-generated exceptions ("hardware interrupts")
100 for (i = 0; i < 0x10; i++)
101 intXX_handler[i] = &intXX_exception_handler;
103 /* Mark all other intXX calls as unknown first */
104 for (i = 0x10; i < 0x100; i++)
106 /* If the mainboard_interrupt_handler isn't called first.
108 if(!intXX_handler[i])
110 /* Now set the default functions that are actually
111 * needed to initialize the option roms. This is
112 * very slick, as it allows us to implement mainboard
113 * specific interrupt handlers, such as the int15.
117 intXX_handler[0x10] = &int10_handler;
120 intXX_handler[0x12] = &int12_handler;
123 intXX_handler[0x16] = &int16_handler;
126 intXX_handler[0x1a] = &int1a_handler;
129 intXX_handler[i] = &intXX_unknown_handler;
136 static void write_idt_stub(void *target, u8 intnum)
138 unsigned char *codeptr;
139 codeptr = (unsigned char *) target;
140 memcpy(codeptr, &__idt_handler, (size_t)&__idt_handler_size);
141 codeptr[3] = intnum; /* modify int# in the code stub. */
144 static void setup_realmode_idt(void)
146 struct realmode_idt *idts = (struct realmode_idt *) 0;
149 /* Copy IDT stub code for each interrupt. This might seem wasteful
150 * but it is really simple
152 for (i = 0; i < 256; i++) {
154 idts[i].offset = 0x1000 + (i * (u32)&__idt_handler_size);
155 write_idt_stub((void *)((u32 )idts[i].offset), i);
158 /* Many option ROMs use the hard coded interrupt entry points in the
159 * system bios. So install them at the known locations.
162 /* int42 is the relocated int10 */
163 write_idt_stub((void *)0xff065, 0x42);
164 /* BIOS Int 11 Handler F000:F84D */
165 write_idt_stub((void *)0xff84d, 0x11);
166 /* BIOS Int 12 Handler F000:F841 */
167 write_idt_stub((void *)0xff841, 0x12);
168 /* BIOS Int 13 Handler F000:EC59 */
169 write_idt_stub((void *)0xfec59, 0x13);
170 /* BIOS Int 14 Handler F000:E739 */
171 write_idt_stub((void *)0xfe739, 0x14);
172 /* BIOS Int 15 Handler F000:F859 */
173 write_idt_stub((void *)0xff859, 0x15);
174 /* BIOS Int 16 Handler F000:E82E */
175 write_idt_stub((void *)0xfe82e, 0x16);
176 /* BIOS Int 17 Handler F000:EFD2 */
177 write_idt_stub((void *)0xfefd2, 0x17);
178 /* ROM BIOS Int 1A Handler F000:FE6E */
179 write_idt_stub((void *)0xffe6e, 0x1a);
182 #if CONFIG_FRAMEBUFFER_SET_VESA_MODE
183 static u8 vbe_get_mode_info(vbe_mode_info_t * mode_info)
185 printk(BIOS_DEBUG, "Getting information about VESA mode %04x\n",
186 mode_info->video_mode);
187 char *buffer = (char *)&__buffer;
188 u16 buffer_seg = (((unsigned long)buffer) >> 4) & 0xff00;
189 u16 buffer_adr = ((unsigned long)buffer) & 0xffff;
190 realmode_interrupt(0x10, VESA_GET_MODE_INFO, 0x0000,
191 mode_info->video_mode, 0x0000, buffer_seg, buffer_adr);
192 memcpy(mode_info->mode_info_block, buffer, sizeof(vbe_mode_info_t));
196 static u8 vbe_set_mode(vbe_mode_info_t * mode_info)
198 printk(BIOS_DEBUG, "Setting VESA mode %04x\n", mode_info->video_mode);
199 // request linear framebuffer mode
200 mode_info->video_mode |= (1 << 14);
201 // request clearing of framebuffer
202 mode_info->video_mode &= ~(1 << 15);
203 realmode_interrupt(0x10, VESA_SET_MODE, mode_info->video_mode,
204 0x0000, 0x0000, 0x0000, 0x0000);
208 vbe_mode_info_t mode_info;
210 /* These two functions could probably even be generic between
211 * yabel and x86 native. TBD later.
213 void vbe_set_graphics(void)
215 mode_info.video_mode = (1 << 14) | CONFIG_FRAMEBUFFER_VESA_MODE;
216 vbe_get_mode_info(&mode_info);
217 unsigned char *framebuffer =
218 (unsigned char *)mode_info.vesa.phys_base_ptr;
219 printk(BIOS_DEBUG, "framebuffer: %p\n", framebuffer);
220 vbe_set_mode(&mode_info);
221 #if CONFIG_BOOTSPLASH
222 struct jpeg_decdata *decdata;
223 decdata = malloc(sizeof(*decdata));
224 unsigned char *jpeg = cbfs_find_file("bootsplash.jpg",
225 CBFS_TYPE_BOOTSPLASH);
230 ret = jpeg_decode(jpeg, framebuffer, 1024, 768, 16, decdata);
234 void vbe_textmode_console(void)
237 realmode_interrupt(0x10, 0x0003, 0x0000, 0x0000,
238 0x0000, 0x0000, 0x0000);
241 void fill_lb_framebuffer(struct lb_framebuffer *framebuffer)
243 framebuffer->physical_address = mode_info.vesa.phys_base_ptr;
245 framebuffer->x_resolution = le16_to_cpu(mode_info.vesa.x_resolution);
246 framebuffer->y_resolution = le16_to_cpu(mode_info.vesa.y_resolution);
247 framebuffer->bytes_per_line =
248 le16_to_cpu(mode_info.vesa.bytes_per_scanline);
249 framebuffer->bits_per_pixel = mode_info.vesa.bits_per_pixel;
251 framebuffer->red_mask_pos = mode_info.vesa.red_mask_pos;
252 framebuffer->red_mask_size = mode_info.vesa.red_mask_size;
254 framebuffer->green_mask_pos = mode_info.vesa.green_mask_pos;
255 framebuffer->green_mask_size = mode_info.vesa.green_mask_size;
257 framebuffer->blue_mask_pos = mode_info.vesa.blue_mask_pos;
258 framebuffer->blue_mask_size = mode_info.vesa.blue_mask_size;
260 framebuffer->reserved_mask_pos = mode_info.vesa.reserved_mask_pos;
261 framebuffer->reserved_mask_size = mode_info.vesa.reserved_mask_size;
265 void run_bios(struct device *dev, unsigned long addr)
267 u32 num_dev = (dev->bus->secondary << 8) | dev->path.pci.devfn;
269 /* Setting up required hardware.
270 * Removing this will cause random illegal instruction exceptions
271 * in some option roms.
275 /* Set up BIOS Data Area */
278 /* Set up some legacy information in the F segment */
281 /* Set up C interrupt handlers */
282 setup_interrupt_handlers();
284 /* Set up real-mode IDT */
285 setup_realmode_idt();
287 memcpy(REALMODE_BASE, &__realmode_code, (size_t)&__realmode_code_size);
288 printk(BIOS_SPEW, "Real mode stub @%p: %d bytes\n", REALMODE_BASE,
289 (u32)&__realmode_code_size);
291 printk(BIOS_DEBUG, "Calling Option ROM...\n");
292 /* TODO ES:DI Pointer to System BIOS PnP Installation Check Structure */
293 /* Option ROM entry point is at OPROM start + 3 */
294 realmode_call(addr + 0x0003, num_dev, 0xffff, 0x0000, 0xffff, 0x0, 0x0);
295 printk(BIOS_DEBUG, "... Option ROM returned.\n");
297 #if CONFIG_FRAMEBUFFER_SET_VESA_MODE
303 #include <cpu/amd/lxdef.h>
304 #include <cpu/amd/vr.h>
307 #define VSA2_BUFFER 0x60000
308 #define VSA2_ENTRY_POINT 0x60020
310 // TODO move to a header file.
311 void do_vsmbios(void);
313 /* VSA virtual register helper */
314 static u32 VSA_vrRead(u16 classIndex)
316 u32 eax, ebx, ecx, edx;
318 "movw $0x0AC1C, %%dx\n"
319 "orl $0x0FC530000, %%eax\n"
323 : "=a" (eax), "=b"(ebx), "=c"(ecx), "=d"(edx)
330 void do_vsmbios(void)
332 printk(BIOS_DEBUG, "Preparing for VSA...\n");
334 /* Set up C interrupt handlers */
335 setup_interrupt_handlers();
337 /* Setting up realmode IDT */
338 setup_realmode_idt();
340 memcpy(REALMODE_BASE, &__realmode_code, (size_t)&__realmode_code_size);
341 printk(BIOS_SPEW, "VSA: Real mode stub @%p: %d bytes\n", REALMODE_BASE,
342 (u32)&__realmode_code_size);
344 if ((unsigned int)cbfs_load_stage("vsa") != VSA2_ENTRY_POINT) {
345 printk(BIOS_ERR, "Failed to load VSA.\n");
349 unsigned char *buf = (unsigned char *)VSA2_BUFFER;
350 printk(BIOS_DEBUG, "VSA: Buffer @%p *[0k]=%02x\n", buf, buf[0]);
351 printk(BIOS_DEBUG, "VSA: Signature *[0x20-0x23] is %02x:%02x:%02x:%02x\n",
352 buf[0x20], buf[0x21], buf[0x22], buf[0x23]);
354 /* Check for code to emit POST code at start of VSA. */
355 if ((buf[0x20] != 0xb0) || (buf[0x21] != 0x10) ||
356 (buf[0x22] != 0xe6) || (buf[0x23] != 0x80)) {
357 printk(BIOS_WARNING, "VSA: Signature incorrect. Install failed.\n");
361 printk(BIOS_DEBUG, "Calling VSA module...\n");
363 /* ECX gets SMM, EDX gets SYSMEM */
364 realmode_call(VSA2_ENTRY_POINT, 0x0, 0x0, MSR_GLIU0_SMM,
365 MSR_GLIU0_SYSMEM, 0x0, 0x0);
367 printk(BIOS_DEBUG, "... VSA module returned.\n");
369 /* Restart timer 1 */
373 /* Check that VSA is running OK */
374 if (VSA_vrRead(SIGNATURE) == VSA2_SIGNATURE)
375 printk(BIOS_DEBUG, "VSM: VSA2 VR signature verified.\n");
377 printk(BIOS_ERR, "VSM: VSA2 VR signature not valid. Install failed.\n");
381 /* interrupt_handler() is called from assembler code only,
382 * so there is no use in putting the prototype into a header file.
384 int __attribute__((regparm(0))) interrupt_handler(u32 intnumber,
390 u32 cs_ip, u16 stackflags);
392 int __attribute__((regparm(0))) interrupt_handler(u32 intnumber,
398 u32 cs_ip, u16 stackflags)
404 struct eregs reg_info;
410 #if CONFIG_REALMODE_DEBUG
411 printk(BIOS_DEBUG, "oprom: INT# 0x%x\n", intnumber);
412 printk(BIOS_DEBUG, "oprom: eax: %08x ebx: %08x ecx: %08x edx: %08x\n",
414 printk(BIOS_DEBUG, "oprom: ebp: %08x esp: %08x edi: %08x esi: %08x\n",
416 printk(BIOS_DEBUG, "oprom: ip: %04x cs: %04x flags: %08x\n",
420 // Fetch arguments from the stack and put them into
421 // a structure that we want to pass on to our sub interrupt
423 reg_info = (struct eregs) {
439 // Call the interrupt handler for this int#
440 ret = intXX_handler[intnumber](®_info);
442 // Put registers back on the stack. The assembler code
443 // will later pop them.
444 // What happens here is that we force (volatile!) changing
445 // the values of the parameters of this function. We do this
446 // because we know that they stay alive on the stack after
447 // we leave this function. Don't say this is bollocks.
448 *(volatile u32 *)&eax = reg_info.eax;
449 *(volatile u32 *)&ecx = reg_info.ecx;
450 *(volatile u32 *)&edx = reg_info.edx;
451 *(volatile u32 *)&ebx = reg_info.ebx;
452 *(volatile u32 *)&esi = reg_info.esi;
453 *(volatile u32 *)&edi = reg_info.edi;
454 flags = reg_info.eflags;
456 /* Pass errors back to our caller via the CARRY flag */
458 printk(BIOS_DEBUG,"int%02x call returned error.\n", intnumber);
459 flags |= 1; // error: set carry
461 flags &= ~1; // no error: clear carry
463 *(volatile u16 *)&stackflags = flags;