blob: d6ad4e23a0c8d3a9fc801525d33cedd5bd2b6c55 [file] [log] [blame]
#include <arch/io.h>
#include <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <device/pci_ops.h>
#include <x86emu/x86emu.h>
#define MEM_WB(where, what) wrb(where, what)
#define MEM_WW(where, what) wrw(where, what)
#define MEM_WL(where, what) wrl(where, what)
#define MEM_RB(where) rdb(where)
#define MEM_RW(where) rdw(where)
#define MEM_RL(where) rdl(where)
u8 x_inb(u16 port);
u16 x_inw(u16 port);
void x_outb(u16 port, u8 val);
void x_outw(u16 port, u16 val);
u32 x_inl(u16 port);
void x_outl(u16 port, u32 val);
/* general software interrupt handler */
u32 getIntVect(int num)
{
return MEM_RW(num << 2) + (MEM_RW((num << 2) + 2) << 4);
}
/* FixME: There is already a push_word() in the emulator */
void pushw(u16 val)
{
X86_ESP -= 2;
MEM_WW(((u32) X86_SS << 4) + X86_SP, val);
}
int run_bios_int(int num)
{
u32 eflags;
eflags = X86_EFLAGS;
pushw(eflags);
pushw(X86_CS);
pushw(X86_IP);
X86_CS = MEM_RW((num << 2) + 2);
X86_IP = MEM_RW(num << 2);
return 1;
}
u8 x_inb(u16 port)
{
u8 val;
val = inb(port);
//if (port != 0x40)
// printk_debug("inb(0x%04x) = 0x%02x\n", port, val);
return val;
}
u16 x_inw(u16 port)
{
u16 val;
val = inw(port);
//printk_debug("inw(0x%04x) = 0x%04x\n", port, val);
return val;
}
u32 x_inl(u16 port)
{
u32 val;
val = inl(port);
//printk_debug("inl(0x%04x) = 0x%08x\n", port, val);
return val;
}
void x_outb(u16 port, u8 val)
{
//if (port != 0x43)
// printk_debug("outb(0x%02x, 0x%04x)\n", val, port);
outb(val, port);
}
void x_outw(u16 port, u16 val)
{
//printk_debug("outw(0x%04x, 0x%04x)\n", val, port);
outw(val, port);
}
void x_outl(u16 port, u32 val)
{
//printk_debug("outl(0x%08x, 0x%04x)\n", val, port);
outl(val, port);
}
X86EMU_pioFuncs myfuncs = {
x_inb, x_inw, x_inl,
x_outb, x_outw, x_outl
};
/* Interrupt multiplexer */
void do_int(int num)
{
int ret = 0;
// printk_debug("int%x vector at %x\n", num, getIntVect(num));
switch (num) {
#ifndef _PC
case 0x10:
case 0x42:
case 0x6D:
if (getIntVect(num) == 0x0000) {
printk_debug("un-inited int vector\n");
}
if (getIntVect(num) == 0xFF065) {
//ret = int42_handler();
ret = 1;
}
break;
#endif
case 0x15:
//ret = int15_handler();
ret = 1;
break;
case 0x16:
//ret = int16_handler();
ret = 0;
break;
case 0x1A:
ret = pcibios_handler();
ret = 1;
break;
case 0xe6:
//ret = intE6_handler();
ret = 0;
break;
default:
break;
}
if (!ret)
ret = run_bios_int(num);
}
#if 0
#define SYS_BIOS 0xf0000
/*
* here we are really paranoid about faking a "real"
* BIOS. Most of this information was pulled from
* dosemu.
*/
#if 0
void setup_int_vect(void)
{
int i;
/* let the int vects point to the SYS_BIOS seg */
for (i = 0; i < 0x80; i++) {
MEM_WW(i << 2, 0);
MEM_WW((i << 2) + 2, SYS_BIOS >> 4);
}
reset_int_vect();
/* font tables default location (int 1F) */
MEM_WW(0x1f << 2, 0xfa6e);
/* int 11 default location (Get Equipment Configuration) */
MEM_WW(0x11 << 2, 0xf84d);
/* int 12 default location (Get Conventional Memory Size) */
MEM_WW(0x12 << 2, 0xf841);
/* int 15 default location (I/O System Extensions) */
MEM_WW(0x15 << 2, 0xf859);
/* int 1A default location (RTC, PCI and others) */
MEM_WW(0x1a << 2, 0xff6e);
/* int 05 default location (Bound Exceeded) */
MEM_WW(0x05 << 2, 0xff54);
/* int 08 default location (Double Fault) */
MEM_WW(0x08 << 2, 0xfea5);
/* int 13 default location (Disk) */
MEM_WW(0x13 << 2, 0xec59);
/* int 0E default location (Page Fault) */
MEM_WW(0x0e << 2, 0xef57);
/* int 17 default location (Parallel Port) */
MEM_WW(0x17 << 2, 0xefd2);
/* fdd table default location (int 1e) */
MEM_WW(0x1e << 2, 0xefc7);
/* Set Equipment flag to VGA */
i = MEM_RB(0x0410) & 0xCF;
MEM_WB(0x0410, i);
/* XXX Perhaps setup more of the BDA here. See also int42(0x00). */
}
int setup_system_bios(void *base_addr)
{
char *base = (char *) base_addr;
/*
* we trap the "industry standard entry points" to the BIOS
* and all other locations by filling them with "hlt"
* TODO: implement hlt-handler for these
*/
memset(base, 0xf4, 0x10000);
/* set bios date */
//strcpy(base + 0x0FFF5, "06/11/99");
/* set up eisa ident string */
//strcpy(base + 0x0FFD9, "PCI_ISA");
/* write system model id for IBM-AT */
//*((unsigned char *) (base + 0x0FFFE)) = 0xfc;
return 1;
}
#endif
void reset_int_vect(void)
{
/*
* This table is normally located at 0xF000:0xF0A4. However, int 0x42,
* function 0 (Mode Set) expects it (or a copy) somewhere in the bottom
* 64kB. Note that because this data doesn't survive POST, int 0x42 should
* only be used during EGA/VGA BIOS initialisation.
*/
static const u8 VideoParms[] = {
/* Timing for modes 0x00 & 0x01 */
0x38, 0x28, 0x2d, 0x0a, 0x1f, 0x06, 0x19, 0x1c,
0x02, 0x07, 0x06, 0x07, 0x00, 0x00, 0x00, 0x00,
/* Timing for modes 0x02 & 0x03 */
0x71, 0x50, 0x5a, 0x0a, 0x1f, 0x06, 0x19, 0x1c,
0x02, 0x07, 0x06, 0x07, 0x00, 0x00, 0x00, 0x00,
/* Timing for modes 0x04, 0x05 & 0x06 */
0x38, 0x28, 0x2d, 0x0a, 0x7f, 0x06, 0x64, 0x70,
0x02, 0x01, 0x06, 0x07, 0x00, 0x00, 0x00, 0x00,
/* Timing for mode 0x07 */
0x61, 0x50, 0x52, 0x0f, 0x19, 0x06, 0x19, 0x19,
0x02, 0x0d, 0x0b, 0x0c, 0x00, 0x00, 0x00, 0x00,
/* Display page lengths in little endian order */
0x00, 0x08, /* Modes 0x00 and 0x01 */
0x00, 0x10, /* Modes 0x02 and 0x03 */
0x00, 0x40, /* Modes 0x04 and 0x05 */
0x00, 0x40, /* Modes 0x06 and 0x07 */
/* Number of columns for each mode */
40, 40, 80, 80, 40, 40, 80, 80,
/* CGA Mode register value for each mode */
0x2c, 0x28, 0x2d, 0x29, 0x2a, 0x2e, 0x1e, 0x29,
/* Padding */
0x00, 0x00, 0x00, 0x00
};
int i;
for (i = 0; i < sizeof(VideoParms); i++)
MEM_WB(i + (0x1000 - sizeof(VideoParms)), VideoParms[i]);
MEM_WW(0x1d << 2, 0x1000 - sizeof(VideoParms));
MEM_WW((0x1d << 2) + 2, 0);
printk_debug("SETUP INT\n");
MEM_WW(0x10 << 2, 0xf065);
MEM_WW((0x10 << 2) + 2, SYS_BIOS >> 4);
MEM_WW(0x42 << 2, 0xf065);
MEM_WW((0x42 << 2) + 2, SYS_BIOS >> 4);
MEM_WW(0x6D << 2, 0xf065);
MEM_WW((0x6D << 2) + 2, SYS_BIOS >> 4);
}
#endif
void run_bios(struct device * dev, unsigned long addr)
{
#if 1
int i;
unsigned short initialcs = (addr & 0xF0000) >> 4;
unsigned short initialip = (addr + 3) & 0xFFFF;
unsigned short devfn = dev->bus->secondary << 8 | dev->path.u.pci.devfn;
X86EMU_intrFuncs intFuncs[256];
X86EMU_setMemBase(0, 0x100000);
X86EMU_setupPioFuncs(&myfuncs);
for (i = 0; i < 256; i++)
intFuncs[i] = do_int;
X86EMU_setupIntrFuncs(intFuncs);
{
char *date = "01/01/99";
for (i = 0; date[i]; i++)
wrb(0xffff5 + i, date[i]);
wrb(0xffff7, '/');
wrb(0xffffa, '/');
}
{
/* FixME: move PIT init to its own file */
outb(0x36, 0x43);
outb(0x00, 0x40);
outb(0x00, 0x40);
}
//setup_int_vect();
/* cpu setup */
X86_AX = devfn ? devfn : 0xff;
X86_DX = 0x80;
X86_EIP = initialip;
X86_CS = initialcs;
/* Initialize stack and data segment */
X86_SS = initialcs;
X86_SP = 0xfffe;
X86_DS = 0x0040;
X86_ES = 0x0000;
/* We need a sane way to return from bios
* execution. A hlt instruction and a pointer
* to it, both kept on the stack, will do.
*/
pushw(0xf4f4); /* hlt; hlt */
pushw(X86_SS);
pushw(X86_SP + 2);
// X86EMU_trace_on();
printk_info("entering emulator\n");
X86EMU_exec();
#endif
}