|
|
|
|
@ -28,86 +28,94 @@ |
|
|
|
|
#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) |
|
|
|
|
#define PRINTF(fmt, args...) printf(fmt, ##args) |
|
|
|
|
#else |
|
|
|
|
#define PRINTF(fmt,args...) |
|
|
|
|
#define PRINTF(fmt, args...) |
|
|
|
|
#endif |
|
|
|
|
|
|
|
|
|
#ifdef CONFIG_PCI |
|
|
|
|
|
|
|
|
|
#ifdef PCI_BIOS_DEBUG |
|
|
|
|
#define RELOC_16(seg, off) *(u32*)(seg << 4 | (u32)&off) |
|
|
|
|
extern u32 num_pci_bios_present; |
|
|
|
|
extern u32 num_pci_bios_find_device; |
|
|
|
|
extern u32 num_pci_bios_find_class; |
|
|
|
|
extern u32 num_pci_bios_generate_special_cycle; |
|
|
|
|
extern u32 num_pci_bios_read_cfg_byte; |
|
|
|
|
extern u32 num_pci_bios_read_cfg_word; |
|
|
|
|
extern u32 num_pci_bios_read_cfg_dword; |
|
|
|
|
extern u32 num_pci_bios_write_cfg_byte; |
|
|
|
|
extern u32 num_pci_bios_write_cfg_word; |
|
|
|
|
extern u32 num_pci_bios_write_cfg_dword; |
|
|
|
|
extern u32 num_pci_bios_get_irq_routing; |
|
|
|
|
extern u32 num_pci_bios_set_irq; |
|
|
|
|
extern u32 num_pci_bios_unknown_function; |
|
|
|
|
|
|
|
|
|
void print_bios_bios_stat(void) |
|
|
|
|
{ |
|
|
|
|
printf("16 bit functions:\n"); |
|
|
|
|
printf("pci_bios_present: %d\n", RELOC_16(0xf000, num_pci_bios_present)); |
|
|
|
|
printf("pci_bios_find_device: %d\n", RELOC_16(0xf000, num_pci_bios_find_device)); |
|
|
|
|
printf("pci_bios_find_class: %d\n", RELOC_16(0xf000, num_pci_bios_find_class)); |
|
|
|
|
printf("pci_bios_generate_special_cycle: %d\n", RELOC_16(0xf000, num_pci_bios_generate_special_cycle)); |
|
|
|
|
printf("pci_bios_read_cfg_byte: %d\n", RELOC_16(0xf000, num_pci_bios_read_cfg_byte)); |
|
|
|
|
printf("pci_bios_read_cfg_word: %d\n", RELOC_16(0xf000, num_pci_bios_read_cfg_word)); |
|
|
|
|
printf("pci_bios_read_cfg_dword: %d\n", RELOC_16(0xf000, num_pci_bios_read_cfg_dword)); |
|
|
|
|
printf("pci_bios_write_cfg_byte: %d\n", RELOC_16(0xf000, num_pci_bios_write_cfg_byte)); |
|
|
|
|
printf("pci_bios_write_cfg_word: %d\n", RELOC_16(0xf000, num_pci_bios_write_cfg_word)); |
|
|
|
|
printf("pci_bios_write_cfg_dword: %d\n", RELOC_16(0xf000, num_pci_bios_write_cfg_dword)); |
|
|
|
|
printf("pci_bios_get_irq_routing: %d\n", RELOC_16(0xf000, num_pci_bios_get_irq_routing)); |
|
|
|
|
printf("pci_bios_set_irq: %d\n", RELOC_16(0xf000, num_pci_bios_set_irq)); |
|
|
|
|
printf("pci_bios_unknown_function: %d\n", RELOC_16(0xf000, num_pci_bios_unknown_function)); |
|
|
|
|
printf("pci_bios_present: %d\n", |
|
|
|
|
RELOC_16_LONG(0xf000, num_pci_bios_present)); |
|
|
|
|
printf("pci_bios_find_device: %d\n", |
|
|
|
|
RELOC_16_LONG(0xf000, num_pci_bios_find_device)); |
|
|
|
|
printf("pci_bios_find_class: %d\n", |
|
|
|
|
RELOC_16_LONG(0xf000, num_pci_bios_find_class)); |
|
|
|
|
printf("pci_bios_generate_special_cycle: %d\n", |
|
|
|
|
RELOC_16_LONG(0xf000, |
|
|
|
|
num_pci_bios_generate_special_cycle)); |
|
|
|
|
printf("pci_bios_read_cfg_byte: %d\n", |
|
|
|
|
RELOC_16_LONG(0xf000, num_pci_bios_read_cfg_byte)); |
|
|
|
|
printf("pci_bios_read_cfg_word: %d\n", |
|
|
|
|
RELOC_16_LONG(0xf000, num_pci_bios_read_cfg_word)); |
|
|
|
|
printf("pci_bios_read_cfg_dword: %d\n", |
|
|
|
|
RELOC_16_LONG(0xf000, num_pci_bios_read_cfg_dword)); |
|
|
|
|
printf("pci_bios_write_cfg_byte: %d\n", |
|
|
|
|
RELOC_16_LONG(0xf000, num_pci_bios_write_cfg_byte)); |
|
|
|
|
printf("pci_bios_write_cfg_word: %d\n", |
|
|
|
|
RELOC_16_LONG(0xf000, num_pci_bios_write_cfg_word)); |
|
|
|
|
printf("pci_bios_write_cfg_dword: %d\n", |
|
|
|
|
RELOC_16_LONG(0xf000, num_pci_bios_write_cfg_dword)); |
|
|
|
|
printf("pci_bios_get_irq_routing: %d\n", |
|
|
|
|
RELOC_16_LONG(0xf000, num_pci_bios_get_irq_routing)); |
|
|
|
|
printf("pci_bios_set_irq: %d\n", |
|
|
|
|
RELOC_16_LONG(0xf000, num_pci_bios_set_irq)); |
|
|
|
|
printf("pci_bios_unknown_function: %d\n", |
|
|
|
|
RELOC_16_LONG(0xf000, num_pci_bios_unknown_function)); |
|
|
|
|
|
|
|
|
|
} |
|
|
|
|
#endif |
|
|
|
|
|
|
|
|
|
#ifdef CONFIG_VIDEO |
|
|
|
|
|
|
|
|
|
#define PCI_CLASS_VIDEO 3 |
|
|
|
|
#define PCI_CLASS_VIDEO_STD 0 |
|
|
|
|
#define PCI_CLASS_VIDEO_PROG_IF_VGA 0 |
|
|
|
|
#define PCI_CLASS_VIDEO 3 |
|
|
|
|
#define PCI_CLASS_VIDEO_STD 0 |
|
|
|
|
#define PCI_CLASS_VIDEO_PROG_IF_VGA 0 |
|
|
|
|
|
|
|
|
|
static struct pci_device_id supported[] = { |
|
|
|
|
DEFINE_PCI_DEVICE_TABLE(supported) = { |
|
|
|
|
{PCI_VIDEO_VENDOR_ID, PCI_VIDEO_DEVICE_ID}, |
|
|
|
|
{} |
|
|
|
|
}; |
|
|
|
|
|
|
|
|
|
static u32 probe_pci_video(void) |
|
|
|
|
{ |
|
|
|
|
pci_dev_t devbusfn; |
|
|
|
|
struct pci_controller *hose; |
|
|
|
|
pci_dev_t devbusfn = pci_find_devices(supported, 0); |
|
|
|
|
|
|
|
|
|
if ((devbusfn = pci_find_devices(supported, 0) != -1)) { |
|
|
|
|
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)); |
|
|
|
|
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); |
|
|
|
|
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_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); |
|
|
|
|
|
|
|
|
|
@ -117,13 +125,14 @@ static u32 probe_pci_video(void) |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
/* device have a rom */ |
|
|
|
|
if (pci_shadow_rom(devbusfn, (void*)0xc0000)) { |
|
|
|
|
if (pci_shadow_rom(devbusfn, (void *)0xc0000)) { |
|
|
|
|
printf("Shadowing of PCI VGA BIOS failed\n"); |
|
|
|
|
return 0; |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
/* Now enable lagacy VGA port access */ |
|
|
|
|
if (pci_enable_legacy_video_ports(pci_bus_to_hose(PCI_BUS(devbusfn)))) { |
|
|
|
|
hose = pci_bus_to_hose(PCI_BUS(devbusfn)); |
|
|
|
|
if (pci_enable_legacy_video_ports(hose)) { |
|
|
|
|
printf("PCI VGA enable failed\n"); |
|
|
|
|
return 0; |
|
|
|
|
} |
|
|
|
|
@ -131,7 +140,7 @@ static u32 probe_pci_video(void) |
|
|
|
|
|
|
|
|
|
/* return the pci device info, that we'll need later */ |
|
|
|
|
return PCI_BUS(devbusfn) << 8 | |
|
|
|
|
PCI_DEV(devbusfn) << 3 | (PCI_FUNC(devbusfn)&7); |
|
|
|
|
PCI_DEV(devbusfn) << 3 | (PCI_FUNC(devbusfn) & 7); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
return 0; |
|
|
|
|
@ -142,13 +151,17 @@ static int probe_isa_video(void) |
|
|
|
|
u32 ptr; |
|
|
|
|
char *buf; |
|
|
|
|
|
|
|
|
|
if (0 == (ptr = isa_map_rom(0xc0000, 0x8000))) { |
|
|
|
|
ptr = isa_map_rom(0xc0000, 0x8000); |
|
|
|
|
|
|
|
|
|
if (!ptr) |
|
|
|
|
return -1; |
|
|
|
|
} |
|
|
|
|
if (NULL == (buf=malloc(0x8000))) { |
|
|
|
|
|
|
|
|
|
buf = malloc(0x8000); |
|
|
|
|
if (!buf) { |
|
|
|
|
isa_unmap_rom(ptr); |
|
|
|
|
return -1; |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
if (readw(ptr) != 0xaa55) { |
|
|
|
|
free(buf); |
|
|
|
|
isa_unmap_rom(ptr); |
|
|
|
|
@ -156,9 +169,9 @@ static int probe_isa_video(void) |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
/* shadow the rom */ |
|
|
|
|
memcpy(buf, (void*)ptr, 0x8000); |
|
|
|
|
memcpy(buf, (void *)ptr, 0x8000); |
|
|
|
|
isa_unmap_rom(ptr); |
|
|
|
|
memcpy((void*)0xc0000, buf, 0x8000); |
|
|
|
|
memcpy((void *)0xc0000, buf, 0x8000); |
|
|
|
|
|
|
|
|
|
free(buf); |
|
|
|
|
|
|
|
|
|
@ -168,35 +181,35 @@ static int probe_isa_video(void) |
|
|
|
|
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((void *)0xc0000, 0, 0x8000); |
|
|
|
|
memset(®s, 0, sizeof(struct pt_regs)); |
|
|
|
|
|
|
|
|
|
if (probe_isa_video()) { |
|
|
|
|
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) { |
|
|
|
|
int size; |
|
|
|
|
int i; |
|
|
|
|
u8 sum; |
|
|
|
|
|
|
|
|
|
PRINTF("Found video bios signature\n"); |
|
|
|
|
size = 512*readb(0xc0002); |
|
|
|
|
size = readb(0xc0002) * 512; |
|
|
|
|
PRINTF("size %d\n", size); |
|
|
|
|
sum=0; |
|
|
|
|
for (i=0;i<size;i++) { |
|
|
|
|
sum = 0; |
|
|
|
|
|
|
|
|
|
for (i = 0; i < size; i++) |
|
|
|
|
sum += readb(0xc0000 + i); |
|
|
|
|
} |
|
|
|
|
PRINTF("Checksum is %sOK\n",sum?"NOT ":""); |
|
|
|
|
if (sum) { |
|
|
|
|
|
|
|
|
|
PRINTF("Checksum is %sOK\n", sum ? "NOT " : ""); |
|
|
|
|
|
|
|
|
|
if (sum) |
|
|
|
|
return 1; |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
/* some video bioses (ATI Mach64) seem to think that
|
|
|
|
|
/*
|
|
|
|
|
* Some video bioses (ATI Mach64) seem to think that |
|
|
|
|
* the original int 10 handler is always at |
|
|
|
|
* 0xf000:0xf065 , place an iret instruction there |
|
|
|
|
*/ |
|
|
|
|
@ -205,13 +218,15 @@ int video_bios_init(void) |
|
|
|
|
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 & 1?"":"NOT "); |
|
|
|
|
PRINTF("BIOS returned %scarry\n", |
|
|
|
|
regs.eflags & 0x00000001 ? "" : "NOT "); |
|
|
|
|
#ifdef PCI_BIOS_DEBUG |
|
|
|
|
print_bios_bios_stat(); |
|
|
|
|
#endif |
|
|
|
|
return (regs.eflags & 1); |
|
|
|
|
return regs.eflags & 0x00000001; |
|
|
|
|
|
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
Graeme Russ
13 years ago