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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2001 Ronald G. Minnich
* Copyright (C) 2005 Nick.Barker9@btinternet.com
* Copyright (C) 2007-2009 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 <device/pci_ids.h>
#include <device/pci_ops.h>
#include <string.h>
#include <console/console.h>
#include <arch/io.h>
#include <arch/registers.h>
#include "x86.h"
// errors go in AH. Just set these up so that word assigns
// will work. KISS.
enum {
PCIBIOS_SUCCESSFUL = 0x0000,
PCIBIOS_UNSUPPORTED = 0x8100,
PCIBIOS_BADVENDOR = 0x8300,
PCIBIOS_NODEV = 0x8600,
PCIBIOS_BADREG = 0x8700
};
int int10_handler(struct eregs *regs)
{
int res=-1;
static u8 cursor_row=0, cursor_col=0;
switch((regs->eax & 0xff00)>>8) {
case 0x01: // Set cursor shape
res = 0;
break;
case 0x02: // Set cursor position
if (cursor_row != ((regs->edx >> 8) & 0xff) ||
cursor_col >= (regs->edx & 0xff)) {
printk(BIOS_INFO, "\n");
}
cursor_row = (regs->edx >> 8) & 0xff;
cursor_col = regs->edx & 0xff;
res = 0;
break;
case 0x03: // Get cursor position
regs->eax &= 0x00ff;
regs->ecx = 0x0607;
regs->edx = (cursor_row << 8) | cursor_col;
res = 0;
break;
case 0x06: // Scroll up
printk(BIOS_INFO, "\n");
res = 0;
break;
case 0x08: // Get Character and Mode at Cursor Position
regs->eax = 0x0f00 | 'A'; // White on black 'A'
res = 0;
break;
case 0x09: // Write Character and attribute
case 0x0e: // Write Character
printk(BIOS_INFO, "%c", regs->eax & 0xff);
res = 0;
break;
case 0x0f: // Get video mode
regs->eax = 0x5002; //80x25
regs->ebx &= 0x00ff;
res = 0;
break;
default:
printk(BIOS_WARNING, "Unknown INT10 function %04x!\n",
regs->eax & 0xffff);
break;
}
return res;
}
int int12_handler(struct eregs *regs)
{
regs->eax = 64 * 1024;
return 0;
}
int int16_handler(struct eregs *regs)
{
int res=-1;
switch((regs->eax & 0xff00)>>8) {
case 0x00: // Check for Keystroke
regs->eax = 0x6120; // Space Bar, Space
res = 0;
break;
case 0x01: // Check for Keystroke
regs->eflags |= 1<<6; // Zero Flag set (no key available)
res = 0;
break;
default:
printk(BIOS_WARNING, "Unknown INT16 function %04x!\n",
regs->eax & 0xffff);
break;
}
return res;
}
#define PCI_CONFIG_SPACE_TYPE1 (1 << 0)
#define PCI_CONFIG_SPACE_TYPE2 (1 << 1)
#define PCI_SPECIAL_CYCLE_TYPE1 (1 << 4)
#define PCI_SPECIAL_CYCLE_TYPE2 (1 << 5)
int int1a_handler(struct eregs *regs)
{
unsigned short func = (unsigned short)regs->eax;
int retval = 0;
unsigned short devid, vendorid, devfn;
/* Use short to get rid of gabage in upper half of 32-bit register */
short devindex;
unsigned char bus;
struct device *dev;
u32 dword;
u16 word;
u8 byte, reg;
switch (func) {
case 0xb101: /* PCIBIOS Check */
regs->edx = 0x20494350; /* ' ICP' */
regs->eax &= 0xffff0000; /* Clear AH / AL */
regs->eax |= PCI_CONFIG_SPACE_TYPE1 | PCI_SPECIAL_CYCLE_TYPE1;
// last bus in the system. Hard code to 255 for now.
// dev_enumerate() does not seem to tell us (publically)
regs->ecx = 0xff;
regs->edi = 0x00000000; /* protected mode entry */
retval = 0;
break;
case 0xb102: /* Find Device */
devid = regs->ecx;
vendorid = regs->edx;
devindex = regs->esi;
dev = 0;
while ((dev = dev_find_device(vendorid, devid, dev))) {
if (devindex <= 0)
break;
devindex--;
}
if (dev) {
unsigned short busdevfn;
regs->eax &= 0xffff00ff; /* Clear AH */
regs->eax |= PCIBIOS_SUCCESSFUL;
// busnum is an unsigned char;
// devfn is an int, so we mask it off.
busdevfn = (dev->bus->secondary << 8)
| (dev->path.pci.devfn & 0xff);
printk(BIOS_DEBUG, "0x%x: return 0x%x\n", func, busdevfn);
regs->ebx = busdevfn;
retval = 0;
} else {
regs->eax &= 0xffff00ff; /* Clear AH */
regs->eax |= PCIBIOS_NODEV;
retval = -1;
}
break;
case 0xb10a: /* Read Config Dword */
case 0xb109: /* Read Config Word */
case 0xb108: /* Read Config Byte */
case 0xb10d: /* Write Config Dword */
case 0xb10c: /* Write Config Word */
case 0xb10b: /* Write Config Byte */
devfn = regs->ebx & 0xff;
bus = regs->ebx >> 8;
reg = regs->edi;
dev = dev_find_slot(bus, devfn);
if (!dev) {
printk(BIOS_DEBUG, "0x%x: BAD DEVICE bus %d devfn 0x%x\n", func, bus, devfn);
// Or are we supposed to return PCIBIOS_NODEV?
regs->eax &= 0xffff00ff; /* Clear AH */
regs->eax |= PCIBIOS_BADREG;
retval = -1;
return retval;
}
switch (func) {
case 0xb108: /* Read Config Byte */
byte = pci_read_config8(dev, reg);
regs->ecx = byte;
break;
case 0xb109: /* Read Config Word */
word = pci_read_config16(dev, reg);
regs->ecx = word;
break;
case 0xb10a: /* Read Config Dword */
dword = pci_read_config32(dev, reg);
regs->ecx = dword;
break;
case 0xb10b: /* Write Config Byte */
byte = regs->ecx;
pci_write_config8(dev, reg, byte);
break;
case 0xb10c: /* Write Config Word */
word = regs->ecx;
pci_write_config16(dev, reg, word);
break;
case 0xb10d: /* Write Config Dword */
dword = regs->ecx;
pci_write_config32(dev, reg, dword);
break;
}
#if CONFIG_REALMODE_DEBUG
printk(BIOS_DEBUG, "0x%x: bus %d devfn 0x%x reg 0x%x val 0x%x\n",
func, bus, devfn, reg, regs->ecx);
#endif
regs->eax &= 0xffff00ff; /* Clear AH */
regs->eax |= PCIBIOS_SUCCESSFUL;
retval = 0;
break;
default:
printk(BIOS_ERR, "UNSUPPORTED PCIBIOS FUNCTION 0x%x\n", func);
regs->eax &= 0xffff00ff; /* Clear AH */
regs->eax |= PCIBIOS_UNSUPPORTED;
retval = -1;
break;
}
return retval;
}
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