| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2007 Advanced Micro Devices, Inc. |
| * Copyright (C) 2009-2010 coresystems GmbH |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; version 2 of the License. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. |
| */ |
| |
| #include <device/pci.h> |
| #include <string.h> |
| |
| #include <arch/io.h> |
| #include <arch/registers.h> |
| #include <console/console.h> |
| #include <arch/interrupt.h> |
| #include <cbfs.h> |
| #include <delay.h> |
| #include <pc80/i8259.h> |
| #include "x86.h" |
| #include "vbe.h" |
| #include <lib/jpeg.h> |
| /* we use x86emu's register file representation */ |
| #include <x86emu/regs.h> |
| |
| /* to have a common register file for interrupt handlers */ |
| X86EMU_sysEnv _X86EMU_env; |
| |
| void (*realmode_call)(u32 addr, u32 eax, u32 ebx, u32 ecx, u32 edx, |
| u32 esi, u32 edi) asmlinkage = |
| (void *)&__realmode_call; |
| |
| void (*realmode_interrupt)(u32 intno, u32 eax, u32 ebx, u32 ecx, u32 edx, |
| u32 esi, u32 edi) asmlinkage = |
| (void *)&__realmode_interrupt; |
| |
| static void setup_rombios(void) |
| { |
| const char date[] = "06/11/99"; |
| memcpy((void *)0xffff5, &date, 8); |
| |
| const char ident[] = "PCI_ISA"; |
| memcpy((void *)0xfffd9, &ident, 7); |
| |
| /* system model: IBM-AT */ |
| write8(0xffffe, 0xfc); |
| } |
| |
| static int (*intXX_handler[256])(void) = { NULL }; |
| |
| static int intXX_exception_handler(void) |
| { |
| /* compatibility shim */ |
| struct eregs reg_info = { |
| .eax=X86_EAX, |
| .ecx=X86_ECX, |
| .edx=X86_EDX, |
| .ebx=X86_EBX, |
| .esp=X86_ESP, |
| .ebp=X86_EBP, |
| .esi=X86_ESI, |
| .edi=X86_EDI, |
| .vector=M.x86.intno, |
| .error_code=0, // FIXME: fill in |
| .eip=X86_EIP, |
| .cs=X86_CS, |
| .eflags=X86_EFLAGS |
| }; |
| struct eregs *regs = ®_info; |
| |
| printk(BIOS_INFO, "Oops, exception %d while executing option rom\n", |
| regs->vector); |
| x86_exception(regs); // Call coreboot exception handler |
| |
| return 0; // Never really returns |
| } |
| |
| static int intXX_unknown_handler(void) |
| { |
| printk(BIOS_INFO, "Unsupported software interrupt #0x%x eax 0x%x\n", |
| M.x86.intno, X86_EAX); |
| |
| return -1; |
| } |
| |
| /* setup interrupt handlers for mainboard */ |
| void mainboard_interrupt_handlers(int intXX, void *intXX_func) |
| { |
| intXX_handler[intXX] = intXX_func; |
| } |
| |
| static void setup_interrupt_handlers(void) |
| { |
| int i; |
| |
| /* The first 16 intXX functions are not BIOS services, |
| * but the CPU-generated exceptions ("hardware interrupts") |
| */ |
| for (i = 0; i < 0x10; i++) |
| intXX_handler[i] = &intXX_exception_handler; |
| |
| /* Mark all other intXX calls as unknown first */ |
| for (i = 0x10; i < 0x100; i++) |
| { |
| /* If the mainboard_interrupt_handler isn't called first. |
| */ |
| if(!intXX_handler[i]) |
| { |
| /* Now set the default functions that are actually |
| * needed to initialize the option roms. This is |
| * very slick, as it allows us to implement mainboard |
| * specific interrupt handlers, such as the int15. |
| */ |
| switch (i) { |
| case 0x10: |
| intXX_handler[0x10] = &int10_handler; |
| break; |
| case 0x12: |
| intXX_handler[0x12] = &int12_handler; |
| break; |
| case 0x16: |
| intXX_handler[0x16] = &int16_handler; |
| break; |
| case 0x1a: |
| intXX_handler[0x1a] = &int1a_handler; |
| break; |
| default: |
| intXX_handler[i] = &intXX_unknown_handler; |
| break; |
| } |
| } |
| } |
| } |
| |
| static void write_idt_stub(void *target, u8 intnum) |
| { |
| unsigned char *codeptr; |
| codeptr = (unsigned char *) target; |
| memcpy(codeptr, &__idt_handler, (size_t)&__idt_handler_size); |
| codeptr[3] = intnum; /* modify int# in the code stub. */ |
| } |
| |
| static void setup_realmode_idt(void) |
| { |
| struct realmode_idt *idts = (struct realmode_idt *) 0; |
| int i; |
| |
| /* Copy IDT stub code for each interrupt. This might seem wasteful |
| * but it is really simple |
| */ |
| for (i = 0; i < 256; i++) { |
| idts[i].cs = 0; |
| idts[i].offset = 0x1000 + (i * (u32)&__idt_handler_size); |
| write_idt_stub((void *)((u32 )idts[i].offset), i); |
| } |
| |
| /* Many option ROMs use the hard coded interrupt entry points in the |
| * system bios. So install them at the known locations. |
| */ |
| |
| /* int42 is the relocated int10 */ |
| write_idt_stub((void *)0xff065, 0x42); |
| /* BIOS Int 11 Handler F000:F84D */ |
| write_idt_stub((void *)0xff84d, 0x11); |
| /* BIOS Int 12 Handler F000:F841 */ |
| write_idt_stub((void *)0xff841, 0x12); |
| /* BIOS Int 13 Handler F000:EC59 */ |
| write_idt_stub((void *)0xfec59, 0x13); |
| /* BIOS Int 14 Handler F000:E739 */ |
| write_idt_stub((void *)0xfe739, 0x14); |
| /* BIOS Int 15 Handler F000:F859 */ |
| write_idt_stub((void *)0xff859, 0x15); |
| /* BIOS Int 16 Handler F000:E82E */ |
| write_idt_stub((void *)0xfe82e, 0x16); |
| /* BIOS Int 17 Handler F000:EFD2 */ |
| write_idt_stub((void *)0xfefd2, 0x17); |
| /* ROM BIOS Int 1A Handler F000:FE6E */ |
| write_idt_stub((void *)0xffe6e, 0x1a); |
| } |
| |
| #if CONFIG_FRAMEBUFFER_SET_VESA_MODE |
| vbe_mode_info_t mode_info; |
| static int mode_info_valid; |
| |
| int vbe_mode_info_valid(void) |
| { |
| return mode_info_valid; |
| } |
| |
| static u8 vbe_get_mode_info(vbe_mode_info_t * mi) |
| { |
| printk(BIOS_DEBUG, "VBE: Getting information about VESA mode %04x\n", |
| mi->video_mode); |
| char *buffer = (char *)&__buffer; |
| u16 buffer_seg = (((unsigned long)buffer) >> 4) & 0xff00; |
| u16 buffer_adr = ((unsigned long)buffer) & 0xffff; |
| realmode_interrupt(0x10, VESA_GET_MODE_INFO, 0x0000, |
| mi->video_mode, 0x0000, buffer_seg, buffer_adr); |
| memcpy(mi->mode_info_block, buffer, sizeof(vbe_mode_info_t)); |
| mode_info_valid = 1; |
| return 0; |
| } |
| |
| static u8 vbe_set_mode(vbe_mode_info_t * mi) |
| { |
| printk(BIOS_DEBUG, "VBE: Setting VESA mode %04x\n", mi->video_mode); |
| // request linear framebuffer mode |
| mi->video_mode |= (1 << 14); |
| // request clearing of framebuffer |
| mi->video_mode &= ~(1 << 15); |
| realmode_interrupt(0x10, VESA_SET_MODE, mi->video_mode, |
| 0x0000, 0x0000, 0x0000, 0x0000); |
| return 0; |
| } |
| |
| /* These two functions could probably even be generic between |
| * yabel and x86 native. TBD later. |
| */ |
| void vbe_set_graphics(void) |
| { |
| mode_info.video_mode = (1 << 14) | CONFIG_FRAMEBUFFER_VESA_MODE; |
| vbe_get_mode_info(&mode_info); |
| unsigned char *framebuffer = |
| (unsigned char *)mode_info.vesa.phys_base_ptr; |
| printk(BIOS_DEBUG, "VBE: resolution: %dx%d@%d\n", |
| le16_to_cpu(mode_info.vesa.x_resolution), |
| le16_to_cpu(mode_info.vesa.y_resolution), |
| mode_info.vesa.bits_per_pixel); |
| printk(BIOS_DEBUG, "VBE: framebuffer: %p\n", framebuffer); |
| if (!framebuffer) { |
| printk(BIOS_DEBUG, "VBE: Mode does not support linear " |
| "framebuffer\n"); |
| return; |
| } |
| |
| vbe_set_mode(&mode_info); |
| #if CONFIG_BOOTSPLASH |
| struct jpeg_decdata *decdata; |
| decdata = malloc(sizeof(*decdata)); |
| unsigned char *jpeg = cbfs_find_file("bootsplash.jpg", |
| CBFS_TYPE_BOOTSPLASH); |
| if (!jpeg) { |
| printk(BIOS_DEBUG, "VBE: No bootsplash found.\n"); |
| return; |
| } |
| int ret = 0; |
| ret = jpeg_decode(jpeg, framebuffer, 1024, 768, 16, decdata); |
| #endif |
| } |
| |
| void vbe_textmode_console(void) |
| { |
| delay(2); |
| realmode_interrupt(0x10, 0x0003, 0x0000, 0x0000, |
| 0x0000, 0x0000, 0x0000); |
| } |
| |
| void fill_lb_framebuffer(struct lb_framebuffer *framebuffer) |
| { |
| framebuffer->physical_address = mode_info.vesa.phys_base_ptr; |
| |
| framebuffer->x_resolution = le16_to_cpu(mode_info.vesa.x_resolution); |
| framebuffer->y_resolution = le16_to_cpu(mode_info.vesa.y_resolution); |
| framebuffer->bytes_per_line = |
| le16_to_cpu(mode_info.vesa.bytes_per_scanline); |
| framebuffer->bits_per_pixel = mode_info.vesa.bits_per_pixel; |
| |
| framebuffer->red_mask_pos = mode_info.vesa.red_mask_pos; |
| framebuffer->red_mask_size = mode_info.vesa.red_mask_size; |
| |
| framebuffer->green_mask_pos = mode_info.vesa.green_mask_pos; |
| framebuffer->green_mask_size = mode_info.vesa.green_mask_size; |
| |
| framebuffer->blue_mask_pos = mode_info.vesa.blue_mask_pos; |
| framebuffer->blue_mask_size = mode_info.vesa.blue_mask_size; |
| |
| framebuffer->reserved_mask_pos = mode_info.vesa.reserved_mask_pos; |
| framebuffer->reserved_mask_size = mode_info.vesa.reserved_mask_size; |
| } |
| #endif |
| |
| void run_bios(struct device *dev, unsigned long addr) |
| { |
| u32 num_dev = (dev->bus->secondary << 8) | dev->path.pci.devfn; |
| |
| /* Setting up required hardware. |
| * Removing this will cause random illegal instruction exceptions |
| * in some option roms. |
| */ |
| setup_i8259(); |
| |
| /* Set up some legacy information in the F segment */ |
| setup_rombios(); |
| |
| /* Set up C interrupt handlers */ |
| setup_interrupt_handlers(); |
| |
| /* Set up real-mode IDT */ |
| setup_realmode_idt(); |
| |
| memcpy(REALMODE_BASE, &__realmode_code, (size_t)&__realmode_code_size); |
| printk(BIOS_SPEW, "Real mode stub @%p: %d bytes\n", REALMODE_BASE, |
| (u32)&__realmode_code_size); |
| |
| printk(BIOS_DEBUG, "Calling Option ROM...\n"); |
| /* TODO ES:DI Pointer to System BIOS PnP Installation Check Structure */ |
| /* Option ROM entry point is at OPROM start + 3 */ |
| realmode_call(addr + 0x0003, num_dev, 0xffff, 0x0000, 0xffff, 0x0, 0x0); |
| printk(BIOS_DEBUG, "... Option ROM returned.\n"); |
| |
| #if CONFIG_FRAMEBUFFER_SET_VESA_MODE |
| vbe_set_graphics(); |
| #endif |
| } |
| |
| #if CONFIG_GEODE_VSA |
| #include <cpu/amd/lxdef.h> |
| #include <cpu/amd/vr.h> |
| #include <cbfs.h> |
| |
| #define VSA2_BUFFER 0x60000 |
| #define VSA2_ENTRY_POINT 0x60020 |
| |
| // TODO move to a header file. |
| void do_vsmbios(void); |
| |
| /* VSA virtual register helper */ |
| static u32 VSA_vrRead(u16 classIndex) |
| { |
| u32 eax, ebx, ecx, edx; |
| asm volatile ( |
| "movw $0x0AC1C, %%dx\n" |
| "orl $0x0FC530000, %%eax\n" |
| "outl %%eax, %%dx\n" |
| "addb $2, %%dl\n" |
| "inw %%dx, %%ax\n" |
| : "=a" (eax), "=b"(ebx), "=c"(ecx), "=d"(edx) |
| : "a"(classIndex) |
| ); |
| |
| return eax; |
| } |
| |
| void do_vsmbios(void) |
| { |
| printk(BIOS_DEBUG, "Preparing for VSA...\n"); |
| |
| /* Set up C interrupt handlers */ |
| setup_interrupt_handlers(); |
| |
| /* Setting up realmode IDT */ |
| setup_realmode_idt(); |
| |
| memcpy(REALMODE_BASE, &__realmode_code, (size_t)&__realmode_code_size); |
| printk(BIOS_SPEW, "VSA: Real mode stub @%p: %d bytes\n", REALMODE_BASE, |
| (u32)&__realmode_code_size); |
| |
| if ((unsigned int)cbfs_load_stage("vsa") != VSA2_ENTRY_POINT) { |
| printk(BIOS_ERR, "Failed to load VSA.\n"); |
| return; |
| } |
| |
| unsigned char *buf = (unsigned char *)VSA2_BUFFER; |
| printk(BIOS_DEBUG, "VSA: Buffer @%p *[0k]=%02x\n", buf, buf[0]); |
| printk(BIOS_DEBUG, "VSA: Signature *[0x20-0x23] is %02x:%02x:%02x:%02x\n", |
| buf[0x20], buf[0x21], buf[0x22], buf[0x23]); |
| |
| /* Check for code to emit POST code at start of VSA. */ |
| if ((buf[0x20] != 0xb0) || (buf[0x21] != 0x10) || |
| (buf[0x22] != 0xe6) || (buf[0x23] != 0x80)) { |
| printk(BIOS_WARNING, "VSA: Signature incorrect. Install failed.\n"); |
| return; |
| } |
| |
| printk(BIOS_DEBUG, "Calling VSA module...\n"); |
| |
| /* ECX gets SMM, EDX gets SYSMEM */ |
| realmode_call(VSA2_ENTRY_POINT, 0x0, 0x0, MSR_GLIU0_SMM, |
| MSR_GLIU0_SYSMEM, 0x0, 0x0); |
| |
| printk(BIOS_DEBUG, "... VSA module returned.\n"); |
| |
| /* Restart timer 1 */ |
| outb(0x56, 0x43); |
| outb(0x12, 0x41); |
| |
| /* Check that VSA is running OK */ |
| if (VSA_vrRead(SIGNATURE) == VSA2_SIGNATURE) |
| printk(BIOS_DEBUG, "VSM: VSA2 VR signature verified.\n"); |
| else |
| printk(BIOS_ERR, "VSM: VSA2 VR signature not valid. Install failed.\n"); |
| } |
| #endif |
| |
| /* interrupt_handler() is called from assembler code only, |
| * so there is no use in putting the prototype into a header file. |
| */ |
| int asmlinkage interrupt_handler(u32 intnumber, |
| u32 gsfs, u32 dses, |
| u32 edi, u32 esi, |
| u32 ebp, u32 esp, |
| u32 ebx, u32 edx, |
| u32 ecx, u32 eax, |
| u32 cs_ip, u16 stackflags); |
| |
| int asmlinkage interrupt_handler(u32 intnumber, |
| u32 gsfs, u32 dses, |
| u32 edi, u32 esi, |
| u32 ebp, u32 esp, |
| u32 ebx, u32 edx, |
| u32 ecx, u32 eax, |
| u32 cs_ip, u16 stackflags) |
| { |
| u32 ip; |
| u32 cs; |
| u32 flags; |
| int ret = 0; |
| |
| ip = cs_ip & 0xffff; |
| cs = cs_ip >> 16; |
| flags = stackflags; |
| |
| #if CONFIG_REALMODE_DEBUG |
| printk(BIOS_DEBUG, "oprom: INT# 0x%x\n", intnumber); |
| printk(BIOS_DEBUG, "oprom: eax: %08x ebx: %08x ecx: %08x edx: %08x\n", |
| eax, ebx, ecx, edx); |
| printk(BIOS_DEBUG, "oprom: ebp: %08x esp: %08x edi: %08x esi: %08x\n", |
| ebp, esp, edi, esi); |
| printk(BIOS_DEBUG, "oprom: ip: %04x cs: %04x flags: %08x\n", |
| ip, cs, flags); |
| #endif |
| |
| // Fetch arguments from the stack and put them to a place |
| // suitable for the interrupt handlers |
| X86_EAX = eax; |
| X86_ECX = ecx; |
| X86_EDX = edx; |
| X86_EBX = ebx; |
| X86_ESP = esp; |
| X86_EBP = ebp; |
| X86_ESI = esi; |
| X86_EDI = edi; |
| M.x86.intno = intnumber; |
| /* TODO: error_code must be stored somewhere */ |
| X86_EIP = ip; |
| X86_CS = cs; |
| X86_EFLAGS = flags; |
| |
| // Call the interrupt handler for this int# |
| ret = intXX_handler[intnumber](); |
| |
| // Put registers back on the stack. The assembler code |
| // will later pop them. |
| // What happens here is that we force (volatile!) changing |
| // the values of the parameters of this function. We do this |
| // because we know that they stay alive on the stack after |
| // we leave this function. Don't say this is bollocks. |
| *(volatile u32 *)&eax = X86_EAX; |
| *(volatile u32 *)&ecx = X86_ECX; |
| *(volatile u32 *)&edx = X86_EDX; |
| *(volatile u32 *)&ebx = X86_EBX; |
| *(volatile u32 *)&esi = X86_ESI; |
| *(volatile u32 *)&edi = X86_EDI; |
| flags = X86_EFLAGS; |
| |
| /* Pass success or error back to our caller via the CARRY flag */ |
| if (ret) { |
| flags &= ~1; // no error: clear carry |
| }else{ |
| printk(BIOS_DEBUG,"int%02x call returned error.\n", intnumber); |
| flags |= 1; // error: set carry |
| } |
| *(volatile u16 *)&stackflags = flags; |
| |
| /* The assembler code doesn't actually care for the return value, |
| * but keep it around so its expectations are met */ |
| return ret; |
| } |
| |