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#include <console/console.h>
#include <arch/io.h>
#include <stdint.h>
#include <mem.h>
#include <part/sizeram.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/hypertransport.h>
#include <device/chip.h>
#include <stdlib.h>
#include <string.h>
#include <bitops.h>
#include "chip.h"
#include "northbridge.h"
static const uint8_t ramregs[] = {0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
0x56, 0x57};
struct mem_range *sizeram(void)
{
unsigned long mmio_basek;
static struct mem_range mem[10];
device_t dev;
int i, idx;
unsigned char rambits;
dev = dev_find_slot(0, 0);
if (!dev) {
printk_err("Cannot find PCI: 0:0\n");
return 0;
}
mem[0].basek = 0;
mem[0].sizek = 65536;
idx = 1;
while(idx < sizeof(mem)/sizeof(mem[0])) {
mem[idx].basek = 0;
mem[idx].sizek = 0;
idx++;
}
for(rambits = 0, i = 0; i < sizeof(ramregs)/sizeof(ramregs[0]); i++) {
unsigned char reg;
reg = pci_read_config8(dev, ramregs[i]);
/* these are ENDING addresses, not sizes.
* if there is memory in this slot, then reg will be > rambits.
* So we just take the max, that gives us total.
* We take the highest one to cover for once and future linuxbios
* bugs. We warn about bugs.
*/
if (reg > rambits)
rambits = reg;
if (reg < rambits)
printk_err("ERROR! register 0x%x is not set!\n",
ramregs[i]);
}
printk_debug("I would set ram size to 0x%x Kbytes\n", (rambits)*8*1024);
mem[0].sizek = rambits*8*1024;
#if 1
for(i = 0; i < idx; i++) {
printk_debug("mem[%d].basek = %08x mem[%d].sizek = %08x\n",
i, mem[i].basek, i, mem[i].sizek);
}
#endif
return mem;
}
static void enumerate(struct chip *chip)
{
extern struct device_operations default_pci_ops_bus;
chip_enumerate(chip);
chip->dev->ops = &default_pci_ops_bus;
}
/*
* This fixup is based on capturing values from an Award bios. Without
* this fixup the DMA write performance is awful (i.e. hdparm -t /dev/hda is 20x
* slower than normal, ethernet drops packets).
* Apparently these registers govern some sort of bus master behavior.
*/
static void
random_fixup() {
device_t pcidev = dev_find_slot(0, 0);
printk_spew("VT8601 random fixup ...\n");
if (pcidev) {
pci_write_config8(pcidev, 0x70, 0xc0);
pci_write_config8(pcidev, 0x71, 0x88);
pci_write_config8(pcidev, 0x72, 0xec);
pci_write_config8(pcidev, 0x73, 0x0c);
pci_write_config8(pcidev, 0x74, 0x0e);
pci_write_config8(pcidev, 0x75, 0x81);
pci_write_config8(pcidev, 0x76, 0x52);
}
}
static void
northbridge_init(struct chip *chip, enum chip_pass pass)
{
struct northbridge_via_vt8601_config *conf =
(struct northbridge_via_vt8601_config *)chip->chip_info;
switch (pass) {
case CONF_PASS_PRE_PCI:
break;
case CONF_PASS_POST_PCI:
break;
case CONF_PASS_PRE_BOOT:
random_fixup();
break;
default:
/* nothing yet */
break;
}
}
struct chip_control northbridge_via_vt8601_control = {
.enumerate = enumerate,
enable: northbridge_init,
.name = "VIA vt8601 Northbridge",
};
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