mirror of
https://github.com/fail0verflow/switch-coreboot.git
synced 2025-05-04 01:39:18 -04:00
fe23cd79ba
This is an infrastructure patch, it will not make vga output work yet. Another patch will follow. This code is imported from LinuxBIOSv2 which had this code imported from LinuxBIOSv1. Signed-off-by: Stefan Reinauer <stepan@coresystems.de> Acked-by: Stefan Reinauer <stepan@coresystems.de> git-svn-id: svn://coreboot.org/repository/LinuxBIOSv3@256 f3766cd6-281f-0410-b1cd-43a5c92072e9
339 lines
7.4 KiB
C
339 lines
7.4 KiB
C
#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>
|
|
|
|
#include "pcbios/pcibios.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);
|
|
|
|
//
|
|
void X86EMU_setMemBase(void *base, size_t size);
|
|
|
|
/* 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(BIOS_DEBUG,"inb(0x%04x) = 0x%02x\n", port, val);
|
|
|
|
return val;
|
|
}
|
|
|
|
u16 x_inw(u16 port)
|
|
{
|
|
u16 val;
|
|
|
|
val = inw(port);
|
|
|
|
//printk(BIOS_DEBUG,"inw(0x%04x) = 0x%04x\n", port, val);
|
|
return val;
|
|
}
|
|
|
|
u32 x_inl(u16 port)
|
|
{
|
|
u32 val;
|
|
|
|
val = inl(port);
|
|
|
|
//printk(BIOS_DEBUG,"inl(0x%04x) = 0x%08x\n", port, val);
|
|
return val;
|
|
}
|
|
|
|
void x_outb(u16 port, u8 val)
|
|
{
|
|
//if (port != 0x43)
|
|
// printk(BIOS_DEBUG,"outb(0x%02x, 0x%04x)\n", val, port);
|
|
outb(val, port);
|
|
}
|
|
|
|
void x_outw(u16 port, u16 val)
|
|
{
|
|
//printk(BIOS_DEBUG,"outw(0x%04x, 0x%04x)\n", val, port);
|
|
outw(val, port);
|
|
}
|
|
|
|
void x_outl(u16 port, u32 val)
|
|
{
|
|
//printk(BIOS_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(BIOS_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("uninitialized interrupt vector\n");
|
|
ret = 1;
|
|
}
|
|
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(BIOS_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("entering emulator\n");
|
|
|
|
X86EMU_exec();
|
|
#endif
|
|
}
|