diff options
Diffstat (limited to 'arch/x86/lib/video_bios.c')
| -rw-r--r-- | arch/x86/lib/video_bios.c | 196 |
1 files changed, 0 insertions, 196 deletions
diff --git a/arch/x86/lib/video_bios.c b/arch/x86/lib/video_bios.c deleted file mode 100644 index 1e06759..0000000 --- a/arch/x86/lib/video_bios.c +++ /dev/null @@ -1,196 +0,0 @@ -/* - * (C) Copyright 2002 - * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se> - * - * See file CREDITS for list of people who contributed to this - * project. - * - * 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; either version 2 of - * the License, or (at your option) any later version. - * - * 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., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA - */ - -#include <common.h> -#include <pci.h> -#include <malloc.h> -#include <asm/ptrace.h> -#include <asm/realmode.h> -#include <asm/io.h> -#include <asm/pci.h> -#include "bios.h" - -#undef PCI_BIOS_DEBUG -#undef VGA_BIOS_DEBUG - -#ifdef VGA_BIOS_DEBUG -#define PRINTF(fmt, args...) printf(fmt, ##args) -#else -#define PRINTF(fmt, args...) -#endif - -#define PCI_CLASS_VIDEO 3 -#define PCI_CLASS_VIDEO_STD 0 -#define PCI_CLASS_VIDEO_PROG_IF_VGA 0 - -DEFINE_PCI_DEVICE_TABLE(supported) = { - {PCI_VIDEO_VENDOR_ID, PCI_VIDEO_DEVICE_ID}, - {} -}; - -static u32 probe_pci_video(void) -{ - struct pci_controller *hose; - pci_dev_t devbusfn = pci_find_devices(supported, 0); - - if ((devbusfn != -1)) { - u32 old; - u32 addr; - - /* PCI video device detected */ - printf("Found PCI VGA device at %02x.%02x.%x\n", - PCI_BUS(devbusfn), - PCI_DEV(devbusfn), - PCI_FUNC(devbusfn)); - - /* Enable I/O decoding as well, PCI viudeo boards - * support I/O accesses, but they provide no - * bar register for this since the ports are fixed. - */ - pci_write_config_word(devbusfn, - PCI_COMMAND, - PCI_COMMAND_MEMORY | - PCI_COMMAND_IO | - PCI_COMMAND_MASTER); - - /* Test the ROM decoder, do the device support a rom? */ - pci_read_config_dword(devbusfn, PCI_ROM_ADDRESS, &old); - pci_write_config_dword(devbusfn, PCI_ROM_ADDRESS, - (u32)PCI_ROM_ADDRESS_MASK); - pci_read_config_dword(devbusfn, PCI_ROM_ADDRESS, &addr); - pci_write_config_dword(devbusfn, PCI_ROM_ADDRESS, old); - - if (!addr) { - printf("PCI VGA have no ROM?\n"); - return 0; - } - - /* device have a rom */ - if (pci_shadow_rom(devbusfn, (void *)0xc0000)) { - printf("Shadowing of PCI VGA BIOS failed\n"); - return 0; - } - - /* Now enable lagacy VGA port access */ - hose = pci_bus_to_hose(PCI_BUS(devbusfn)); - if (pci_enable_legacy_video_ports(hose)) { - printf("PCI VGA enable failed\n"); - return 0; - } - - - /* return the pci device info, that we'll need later */ - return PCI_BUS(devbusfn) << 8 | - PCI_DEV(devbusfn) << 3 | (PCI_FUNC(devbusfn) & 7); - } - - return 0; -} - -static int probe_isa_video(void) -{ - u32 ptr; - char *buf; - - ptr = isa_map_rom(0xc0000, 0x8000); - - if (!ptr) - return -1; - - buf = malloc(0x8000); - if (!buf) { - isa_unmap_rom(ptr); - return -1; - } - - if (readw(ptr) != 0xaa55) { - free(buf); - isa_unmap_rom(ptr); - return -1; - } - - /* shadow the rom */ - memcpy(buf, (void *)ptr, 0x8000); - isa_unmap_rom(ptr); - memcpy((void *)0xc0000, buf, 0x8000); - - free(buf); - - return 0; -} - -int video_bios_init(void) -{ - struct pt_regs regs; - int size; - int i; - u8 sum; - - /* clear the video bios area in case we warmbooted */ - memset((void *)0xc0000, 0, 0x8000); - memset(®s, 0, sizeof(struct pt_regs)); - - if (probe_isa_video()) - /* No ISA board found, try the PCI bus */ - regs.eax = probe_pci_video(); - - /* Did we succeed in mapping any video bios */ - if (readw(0xc0000) == 0xaa55) { - PRINTF("Found video bios signature\n"); - size = readb(0xc0002) * 512; - PRINTF("size %d\n", size); - sum = 0; - - for (i = 0; i < size; i++) - sum += readb(0xc0000 + i); - - PRINTF("Checksum is %sOK\n", sum ? "NOT " : ""); - - if (sum) - return 1; - - /* - * Some video bioses (ATI Mach64) seem to think that - * the original int 10 handler is always at - * 0xf000:0xf065 , place an iret instruction there - */ - writeb(0xcf, 0xff065); - - regs.esp = 0x8000; - regs.xss = 0x2000; - enter_realmode(0xc000, 3, ®s, ®s); - - PRINTF("INT 0x10 vector after: %04x:%04x\n", - readw(0x42), readw(0x40)); - PRINTF("BIOS returned %scarry\n", - regs.eflags & 0x00000001 ? "" : "NOT "); -#ifdef PCI_BIOS_DEBUG - print_bios_bios_stat(); -#endif - return regs.eflags & 0x00000001; - - } - - return 1; - -} |