/*
* This file needs a major cleanup. Too much #if 0 code
*/
#include <console/console.h>
#include <arch/io.h>
#include <stdint.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <device/hypertransport.h>
#include <stdlib.h>
#include <string.h>
#include <bitops.h>
#include "chip.h"
/* hack for now */
void sc520_udelay(int microseconds) {
volatile int x;
for(x = 0; x < 1000; x++)
;
}
/* looks like we define this now */
void
udelay(int microseconds) {
sc520_udelay(microseconds);
}
/*
* set up basic things ...
* PAR should NOT go here, as it might change with the mainboard.
*/
static void cpu_init(device_t dev)
{
unsigned long *l = (unsigned long *) 0xfffef088;
int i;
for(i = 0; i < 16; i++, l++)
printk_err("Par%d: 0x%lx\n", i, *l);
printk_spew("SC520 random fixup ...\n");
}
/* Ollie says: make a northbridge/amd/sc520. Ron sez:
* there is no real northbridge, keep it here in cpu.
* Ron wins, he's writing the code.
*/
void sc520_enable_resources(struct device *dev) {
unsigned char command;
printk_spew("%s\n", __FUNCTION__);
command = pci_read_config8(dev, PCI_COMMAND);
printk_spew("========>%s, command 0x%x\n", __FUNCTION__, command);
command |= PCI_COMMAND_MEMORY | PCI_COMMAND_PARITY | PCI_COMMAND_SERR;
printk_spew("========>%s, command 0x%x\n", __FUNCTION__, command);
pci_write_config8(dev, PCI_COMMAND, command);
command = pci_read_config8(dev, PCI_COMMAND);
printk_spew("========>%s, command 0x%x\n", __FUNCTION__, command);
/*
*/
}
static struct device_operations cpu_operations = {
.read_resources = pci_dev_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = sc520_enable_resources,
.init = cpu_init,
.enable = 0,
.ops_pci = 0,
};
static struct pci_driver cpu_driver __pci_driver = {
.ops = &cpu_operations,
.vendor = PCI_VENDOR_ID_AMD,
.device = 0x3000
};
#define BRIDGE_IO_MASK (IORESOURCE_IO | IORESOURCE_MEM)
static void pci_domain_read_resources(device_t dev)
{
struct resource *resource;
printk_spew("%s\n", __FUNCTION__);
/* Initialize the system wide io space constraints */
resource = new_resource(dev, IOINDEX_SUBTRACTIVE(0,0));
resource->limit = 0xffffUL;
resource->flags = IORESOURCE_IO | IORESOURCE_SUBTRACTIVE | IORESOURCE_ASSIGNED;
/* Initialize the system wide memory resources constraints */
resource = new_resource(dev, IOINDEX_SUBTRACTIVE(1,0));
resource->limit = 0xffffffffULL;
resource->flags = IORESOURCE_MEM | IORESOURCE_SUBTRACTIVE | IORESOURCE_ASSIGNED;
}
static void ram_resource(device_t dev, unsigned long index,
unsigned long basek, unsigned long sizek)
{
struct resource *resource;
printk_spew("%s sizek 0x%x\n", __FUNCTION__, sizek);
if (!sizek) {
return;
}
resource = new_resource(dev, index);
resource->base = ((resource_t)basek) << 10;
resource->size = ((resource_t)sizek) << 10;
resource->flags = IORESOURCE_MEM | IORESOURCE_CACHEABLE | \
IORESOURCE_FIXED | IORESOURCE_STORED | IORESOURCE_ASSIGNED;
}
static void tolm_test(void *gp, struct device *dev, struct resource *new)
{
struct resource **best_p = gp;
struct resource *best;
best = *best_p;
if (!best || (best->base > new->base)) {
best = new;
}
*best_p = best;
}
static uint32_t find_pci_tolm(struct bus *bus)
{
struct resource *min;
uint32_t tolm;
printk_spew("%s\n", __FUNCTION__);
min = 0;
search_bus_resources(bus, IORESOURCE_MEM, IORESOURCE_MEM, tolm_test, &min);
tolm = 0xffffffffUL;
if (min && tolm > min->base) {
tolm = min->base;
}
printk_spew("%s returns 0x%x\n", __FUNCTION__, tolm);
return tolm;
}
static void pci_domain_set_resources(device_t dev)
{
device_t mc_dev;
uint32_t pci_tolm;
printk_spew("%s\n", __FUNCTION__);
pci_tolm = find_pci_tolm(&dev->link[0]);
mc_dev = dev->link[0].children;
if (mc_dev) {
unsigned long tomk, tolmk;
// unsigned char rambits;
// int i;
int idx;
#if 0
for(rambits = 0, i = 0; i < sizeof(ramregs)/sizeof(ramregs[0]); i++) {
unsigned char reg;
reg = pci_read_config8(mc_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);
tomk = rambits*8*1024;
#endif
tomk = 32 * 1024;
/* Compute the top of Low memory */
tolmk = pci_tolm >> 10;
if (tolmk >= tomk) {
/* The PCI hole does does not overlap the memory.
*/
tolmk = tomk;
}
/* Report the memory regions */
idx = 10;
ram_resource(dev, idx++, 0, tolmk);
}
assign_resources(&dev->link[0]);
}
static unsigned int pci_domain_scan_bus(device_t dev, unsigned int max)
{
printk_spew("%s\n", __FUNCTION__);
max = pci_scan_bus(&dev->link[0], PCI_DEVFN(0, 0), 0xff, max);
return max;
}
#if 0
void sc520_enable_resources(device_t dev) {
printk_spew("%s\n", __FUNCTION__);
printk_spew("THIS IS FOR THE SC520 =============================\n");
/*
command = pci_read_config8(dev, PCI_COMMAND);
printk_spew("%s, command 0x%x\n", __FUNCTION__, command);
command |= PCI_COMMAND_MEMORY;
printk_spew("%s, command 0x%x\n", __FUNCTION__, command);
pci_write_config8(dev, PCI_COMMAND, command);
command = pci_read_config8(dev, PCI_COMMAND);
printk_spew("%s, command 0x%x\n", __FUNCTION__, command);
*/
enable_childrens_resources(dev);
printk_spew("%s\n", __FUNCTION__);
}
#endif
static struct device_operations pci_domain_ops = {
.read_resources = pci_domain_read_resources,
.set_resources = pci_domain_set_resources,
/*
* If enable_resources is set to the generic enable_resources
* function the whole thing will hang in an endless loop on
* the ts5300. If this is really needed on another platform,
* something is conceptionally wrong.
*/
.enable_resources = 0, //enable_resources,
.init = 0,
.scan_bus = pci_domain_scan_bus,
};
#if 0
static void cpu_bus_init(device_t dev)
{
printk_spew("cpu_bus_init\n");
}
static void cpu_bus_noop(device_t dev)
{
}
static struct device_operations cpu_bus_ops = {
.read_resources = cpu_bus_noop,
.set_resources = cpu_bus_noop,
.enable_resources = cpu_bus_noop,
.init = cpu_bus_init,
.scan_bus = 0,
};
#endif
static void enable_dev(struct device *dev)
{
printk_spew("%s\n", __FUNCTION__);
/* Set the operations if it is a special bus type */
if (dev->path.type == DEVICE_PATH_PCI_DOMAIN) {
dev->ops = &pci_domain_ops;
pci_set_method(dev);
}
#if 0
/* This is never hit as none of the sc520 boards have
* an APIC cluster defined
*/
else if (dev->path.type == DEVICE_PATH_APIC_CLUSTER) {
dev->ops = &cpu_bus_ops;
}
#endif
}
struct chip_operations cpu_amd_sc520_ops = {
CHIP_NAME("AMD Elan SC520 CPU")
.enable_dev = enable_dev,
};