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>
32 #include "../../src/lib/jpeg.h"
34 void (*realmode_call)(u32 addr, u32 eax, u32 ebx, u32 ecx, u32 edx,
35 u32 esi, u32 edi) __attribute__((regparm(0))) =
36 (void *)&__realmode_call;
38 void (*realmode_interrupt)(u32 intno, u32 eax, u32 ebx, u32 ecx, u32 edx,
39 u32 esi, u32 edi) __attribute__((regparm(0))) =
40 (void *)&__realmode_interrupt;
42 static void setup_bda(void)
44 /* clear BIOS DATA AREA */
45 memset((void *)0x400, 0, 0x200);
47 write16(0x413, FAKE_MEMORY_SIZE / 1024);
48 write16(0x40e, INITIAL_EBDA_SEGMENT);
51 memset((void *)(INITIAL_EBDA_SEGMENT << 4), 0, INITIAL_EBDA_SIZE);
52 write16((INITIAL_EBDA_SEGMENT << 4) + 0x0, INITIAL_EBDA_SIZE / 1024);
55 static void setup_rombios(void)
57 const char date[] = "06/11/99";
58 memcpy((void *)0xffff5, &date, 8);
60 const char ident[] = "PCI_ISA";
61 memcpy((void *)0xfffd9, &ident, 7);
63 /* system model: IBM-AT */
64 write8(0xffffe, 0xfc);
67 int (*intXX_handler[256])(struct eregs *regs) = { NULL };
69 static int intXX_exception_handler(struct eregs *regs)
71 printk(BIOS_INFO, "Oops, exception %d while executing option rom\n",
74 // Odd: The i945GM VGA oprom chokes on a pushl %eax and will
75 // die with an exception #6 if we run the coreboot exception
76 // handler. Just continue, as it executes fine.
77 x86_exception(regs); // Call coreboot exception handler
80 return 0; // Never returns?
83 static int intXX_unknown_handler(struct eregs *regs)
85 printk(BIOS_INFO, "Unsupported software interrupt #0x%x eax 0x%x\n",
86 regs->vector, regs->eax);
91 /* setup interrupt handlers for mainboard */
92 void mainboard_interrupt_handlers(int intXX, void *intXX_func)
94 intXX_handler[intXX] = intXX_func;
97 static void setup_interrupt_handlers(void)
101 /* The first 16 intXX functions are not BIOS services,
102 * but the CPU-generated exceptions ("hardware interrupts")
104 for (i = 0; i < 0x10; i++)
105 intXX_handler[i] = &intXX_exception_handler;
107 /* Mark all other intXX calls as unknown first */
108 for (i = 0x10; i < 0x100; i++)
110 /* If the mainboard_interrupt_handler isn't called first.
112 if(!intXX_handler[i])
114 /* Now set the default functions that are actually
115 * needed to initialize the option roms. This is
116 * very slick, as it allows us to implement mainboard
117 * specific interrupt handlers, such as the int15.
121 intXX_handler[0x10] = &int10_handler;
124 intXX_handler[0x12] = &int12_handler;
127 intXX_handler[0x16] = &int16_handler;
130 intXX_handler[0x1a] = &int1a_handler;
133 intXX_handler[i] = &intXX_unknown_handler;
140 static void write_idt_stub(void *target, u8 intnum)
142 unsigned char *codeptr;
143 codeptr = (unsigned char *) target;
144 memcpy(codeptr, &__idt_handler, (size_t)&__idt_handler_size);
145 codeptr[3] = intnum; /* modify int# in the code stub. */
148 static void setup_realmode_idt(void)
150 struct realmode_idt *idts = (struct realmode_idt *) 0;
153 /* Copy IDT stub code for each interrupt. This might seem wasteful
154 * but it is really simple
156 for (i = 0; i < 256; i++) {
158 idts[i].offset = 0x1000 + (i * (u32)&__idt_handler_size);
159 write_idt_stub((void *)((u32 )idts[i].offset), i);
162 /* Many option ROMs use the hard coded interrupt entry points in the
163 * system bios. So install them at the known locations.
166 /* int42 is the relocated int10 */
167 write_idt_stub((void *)0xff065, 0x42);
168 /* BIOS Int 11 Handler F000:F84D */
169 write_idt_stub((void *)0xff84d, 0x11);
170 /* BIOS Int 12 Handler F000:F841 */
171 write_idt_stub((void *)0xff841, 0x12);
172 /* BIOS Int 13 Handler F000:EC59 */
173 write_idt_stub((void *)0xfec59, 0x13);
174 /* BIOS Int 14 Handler F000:E739 */
175 write_idt_stub((void *)0xfe739, 0x14);
176 /* BIOS Int 15 Handler F000:F859 */
177 write_idt_stub((void *)0xff859, 0x15);
178 /* BIOS Int 16 Handler F000:E82E */
179 write_idt_stub((void *)0xfe82e, 0x16);
180 /* BIOS Int 17 Handler F000:EFD2 */
181 write_idt_stub((void *)0xfefd2, 0x17);
182 /* ROM BIOS Int 1A Handler F000:FE6E */
183 write_idt_stub((void *)0xffe6e, 0x1a);
186 #if CONFIG_FRAMEBUFFER_SET_VESA_MODE
187 static u8 vbe_get_mode_info(vbe_mode_info_t * mode_info)
189 char *buffer = (char *)&__buffer;
190 u16 buffer_seg = (((unsigned long)buffer) >> 4) & 0xff00;
191 u16 buffer_adr = ((unsigned long)buffer) & 0xffff;
192 realmode_interrupt(0x10, VESA_GET_MODE_INFO, 0x0000,
193 mode_info->video_mode, 0x0000, buffer_seg, buffer_adr);
194 memcpy(mode_info, buffer, sizeof(vbe_mode_info_t));
198 static u8 vbe_set_mode(vbe_mode_info_t * mode_info)
200 // request linear framebuffer mode
201 mode_info->video_mode |= (1 << 14);
202 // request clearing of framebuffer
203 mode_info->video_mode &= ~(1 << 15);
204 realmode_interrupt(0x10, VESA_SET_MODE, mode_info->video_mode,
205 0x0000, 0x0000, 0x0000, 0x0000);
209 vbe_mode_info_t mode_info;
211 /* These two functions could probably even be generic between
212 * yabel and x86 native. TBD later.
214 void vbe_set_graphics(void)
216 mode_info.video_mode = (1 << 14) | CONFIG_FRAMEBUFFER_VESA_MODE;
217 vbe_get_mode_info(&mode_info);
218 unsigned char *framebuffer =
219 (unsigned char *) le32_to_cpu(mode_info.vesa.phys_base_ptr);
220 printk(BIOS_DEBUG, "framebuffer: %p\n", framebuffer);
221 printk(BIOS_DEBUG, "framebuffer: %x\n", mode_info.vesa.phys_base_ptr);
222 vbe_set_mode(&mode_info);
223 #if CONFIG_BOOTSPLASH
224 struct jpeg_decdata *decdata;
225 decdata = malloc(sizeof(*decdata));
226 unsigned char *jpeg = cbfs_find_file("bootsplash.jpg",
227 CBFS_TYPE_BOOTSPLASH);
232 ret = jpeg_decode(jpeg, framebuffer, 1024, 768, 16, decdata);
236 void vbe_textmode_console(void)
239 realmode_interrupt(0x10, 0x0003, 0x0000, 0x0000,
240 0x0000, 0x0000, 0x0000);
243 void fill_lb_framebuffer(struct lb_framebuffer *framebuffer)
245 framebuffer->physical_address =
246 le32_to_cpu(mode_info.vesa.phys_base_ptr);
248 framebuffer->x_resolution = le16_to_cpu(mode_info.vesa.x_resolution);
249 framebuffer->y_resolution = le16_to_cpu(mode_info.vesa.y_resolution);
250 framebuffer->bytes_per_line =
251 le16_to_cpu(mode_info.vesa.bytes_per_scanline);
252 framebuffer->bits_per_pixel = mode_info.vesa.bits_per_pixel;
254 framebuffer->red_mask_pos = mode_info.vesa.red_mask_pos;
255 framebuffer->red_mask_size = mode_info.vesa.red_mask_size;
257 framebuffer->green_mask_pos = mode_info.vesa.green_mask_pos;
258 framebuffer->green_mask_size = mode_info.vesa.green_mask_size;
260 framebuffer->blue_mask_pos = mode_info.vesa.blue_mask_pos;
261 framebuffer->blue_mask_size = mode_info.vesa.blue_mask_size;
263 framebuffer->reserved_mask_pos = mode_info.vesa.reserved_mask_pos;
264 framebuffer->reserved_mask_size = mode_info.vesa.reserved_mask_size;
268 void run_bios(struct device *dev, unsigned long addr)
270 u32 num_dev = (dev->bus->secondary << 8) | dev->path.pci.devfn;
272 /* Set up BIOS Data Area */
275 /* Set up some legacy information in the F segment */
278 /* Set up C interrupt handlers */
279 setup_interrupt_handlers();
281 /* Set up real-mode IDT */
282 setup_realmode_idt();
284 memcpy(REALMODE_BASE, &__realmode_code, (size_t)&__realmode_code_size);
285 printk(BIOS_SPEW, "Real mode stub @%p: %d bytes\n", REALMODE_BASE,
286 (u32)&__realmode_code_size);
288 printk(BIOS_DEBUG, "Calling Option ROM...\n");
289 /* TODO ES:DI Pointer to System BIOS PnP Installation Check Structure */
290 /* Option ROM entry point is at OPROM start + 3 */
291 realmode_call(addr + 0x0003, num_dev, 0xffff, 0x0000, 0xffff, 0x0, 0x0);
292 printk(BIOS_DEBUG, "... Option ROM returned.\n");
294 #if CONFIG_FRAMEBUFFER_SET_VESA_MODE
300 #include <cpu/amd/lxdef.h>
301 #include <cpu/amd/vr.h>
304 #define VSA2_BUFFER 0x60000
305 #define VSA2_ENTRY_POINT 0x60020
307 // TODO move to a header file.
308 void do_vsmbios(void);
310 /* VSA virtual register helper */
311 static u32 VSA_vrRead(u16 classIndex)
313 u32 eax, ebx, ecx, edx;
315 "movw $0x0AC1C, %%dx\n"
316 "orl $0x0FC530000, %%eax\n"
320 : "=a" (eax), "=b"(ebx), "=c"(ecx), "=d"(edx)
327 void do_vsmbios(void)
329 printk(BIOS_DEBUG, "Preparing for VSA...\n");
331 /* Set up C interrupt handlers */
332 setup_interrupt_handlers();
334 /* Setting up realmode IDT */
335 setup_realmode_idt();
337 memcpy(REALMODE_BASE, &__realmode_code, (size_t)&__realmode_code_size);
338 printk(BIOS_SPEW, "VSA: Real mode stub @%p: %d bytes\n", REALMODE_BASE,
339 (u32)&__realmode_code_size);
341 if ((unsigned int)cbfs_load_stage("vsa") != VSA2_ENTRY_POINT) {
342 printk(BIOS_ERR, "Failed to load VSA.\n");
346 unsigned char *buf = (unsigned char *)VSA2_BUFFER;
347 printk(BIOS_DEBUG, "VSA: Buffer @%p *[0k]=%02x\n", buf, buf[0]);
348 printk(BIOS_DEBUG, "VSA: Signature *[0x20-0x23] is %02x:%02x:%02x:%02x\n",
349 buf[0x20], buf[0x21], buf[0x22], buf[0x23]);
351 /* Check for code to emit POST code at start of VSA. */
352 if ((buf[0x20] != 0xb0) || (buf[0x21] != 0x10) ||
353 (buf[0x22] != 0xe6) || (buf[0x23] != 0x80)) {
354 printk(BIOS_WARNING, "VSA: Signature incorrect. Install failed.\n");
358 printk(BIOS_DEBUG, "Calling VSA module...\n");
360 /* ECX gets SMM, EDX gets SYSMEM */
361 realmode_call(VSA2_ENTRY_POINT, 0x0, 0x0, MSR_GLIU0_SMM,
362 MSR_GLIU0_SYSMEM, 0x0, 0x0);
364 printk(BIOS_DEBUG, "... VSA module returned.\n");
366 /* Restart timer 1 */
370 /* Check that VSA is running OK */
371 if (VSA_vrRead(SIGNATURE) == VSA2_SIGNATURE)
372 printk(BIOS_DEBUG, "VSM: VSA2 VR signature verified.\n");
374 printk(BIOS_ERR, "VSM: VSA2 VR signature not valid. Install failed.\n");
378 /* interrupt_handler() is called from assembler code only,
379 * so there is no use in putting the prototype into a header file.
381 int __attribute__((regparm(0))) interrupt_handler(u32 intnumber,
387 u32 cs_ip, u16 stackflags);
389 int __attribute__((regparm(0))) interrupt_handler(u32 intnumber,
395 u32 cs_ip, u16 stackflags)
401 struct eregs reg_info;
407 #if CONFIG_REALMODE_DEBUG
408 printk(BIOS_DEBUG, "oprom: INT# 0x%x\n", intnumber);
409 printk(BIOS_DEBUG, "oprom: eax: %08x ebx: %08x ecx: %08x edx: %08x\n",
411 printk(BIOS_DEBUG, "oprom: ebp: %08x esp: %08x edi: %08x esi: %08x\n",
413 printk(BIOS_DEBUG, "oprom: ip: %04x cs: %04x flags: %08x\n",
417 // Fetch arguments from the stack and put them into
418 // a structure that we want to pass on to our sub interrupt
420 reg_info = (struct eregs) {
436 // Call the interrupt handler for this int#
437 ret = intXX_handler[intnumber](®_info);
439 // Put registers back on the stack. The assembler code
440 // will later pop them.
441 // What happens here is that we force (volatile!) changing
442 // the values of the parameters of this function. We do this
443 // because we know that they stay alive on the stack after
444 // we leave this function. Don't say this is bollocks.
445 *(volatile u32 *)&eax = reg_info.eax;
446 *(volatile u32 *)&ecx = reg_info.ecx;
447 *(volatile u32 *)&edx = reg_info.edx;
448 *(volatile u32 *)&ebx = reg_info.ebx;
449 *(volatile u32 *)&esi = reg_info.esi;
450 *(volatile u32 *)&edi = reg_info.edi;
451 flags = reg_info.eflags;
453 /* Pass errors back to our caller via the CARRY flag */
455 printk(BIOS_DEBUG,"int%02x call returned error.\n", intnumber);
456 flags |= 1; // error: set carry
458 flags &= ~1; // no error: clear carry
460 *(volatile u16 *)&stackflags = flags;