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#include <console/console.h>
#include <arch/io.h>
#include <stdint.h>
#include <mem.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 <cpu/cpu.h>
#include "chip.h"
#include "northbridge.h"
#include "amdk8.h"
#define DEVICE_MEM_HIGH 0xFEC00000ULL /* Reserve 20M for the system */
#define DEVICE_IO_START 0x1000
#define FX_DEVS 8
static device_t __f0_dev[FX_DEVS];
static device_t __f1_dev[FX_DEVS];
#if 0
static void debug_fx_devs(void)
{
int i;
for(i = 0; i < FX_DEVS; i++) {
device_t dev;
dev = __f0_dev[i];
if (dev) {
printk_debug("__f0_dev[%d]: %s bus: %p\n",
i, dev_path(dev), dev->bus);
}
dev = __f1_dev[i];
if (dev) {
printk_debug("__f1_dev[%d]: %s bus: %p\n",
i, dev_path(dev), dev->bus);
}
}
}
#endif
static void get_fx_devs(void)
{
int i;
if (__f1_dev[0]) {
return;
}
for(i = 0; i < FX_DEVS; i++) {
__f0_dev[i] = dev_find_slot(0, PCI_DEVFN(0x18 + i, 0));
__f1_dev[i] = dev_find_slot(0, PCI_DEVFN(0x18 + i, 1));
}
if (!__f1_dev[0]) {
die("Cannot find 0:0x18.1\n");
}
}
static uint32_t f1_read_config32(unsigned reg)
{
get_fx_devs();
return pci_read_config32(__f1_dev[0], reg);
}
static void f1_write_config32(unsigned reg, uint32_t value)
{
int i;
get_fx_devs();
for(i = 0; i < FX_DEVS; i++) {
device_t dev;
dev = __f1_dev[i];
if (dev && dev->enabled) {
pci_write_config32(dev, reg, value);
}
}
}
static unsigned int amdk8_nodeid(device_t dev)
{
return (dev->path.u.pci.devfn >> 3) - 0x18;
}
static unsigned int amdk8_scan_chains(device_t dev, unsigned int max)
{
unsigned nodeid;
unsigned link;
nodeid = amdk8_nodeid(dev);
#if 0
printk_debug("%s amdk8_scan_chains max: %d starting...\n",
dev_path(dev), max);
#endif
for(link = 0; link < dev->links; link++) {
uint32_t link_type;
uint32_t busses, config_busses;
unsigned free_reg, config_reg;
dev->link[link].cap = 0x80 + (link *0x20);
do {
link_type = pci_read_config32(dev, dev->link[link].cap + 0x18);
} while(link_type & ConnectionPending);
if (!(link_type & LinkConnected)) {
continue;
}
do {
link_type = pci_read_config32(dev, dev->link[link].cap + 0x18);
} while(!(link_type & InitComplete));
if (!(link_type & NonCoherent)) {
continue;
}
/* See if there is an available configuration space mapping register in function 1. */
free_reg = 0;
for(config_reg = 0xe0; config_reg <= 0xec; config_reg += 4) {
uint32_t config;
config = f1_read_config32(config_reg);
if (!free_reg && ((config & 3) == 0)) {
free_reg = config_reg;
continue;
}
if (((config & 3) == 3) &&
(((config >> 4) & 7) == nodeid) &&
(((config >> 8) & 3) == link)) {
break;
}
}
if (free_reg && (config_reg > 0xec)) {
config_reg = free_reg;
}
/* If we can't find an available configuration space mapping register skip this bus */
if (config_reg > 0xec) {
continue;
}
/* Set up the primary, secondary and subordinate bus numbers. We have
* no idea how many busses are behind this bridge yet, so we set the subordinate
* bus number to 0xff for the moment.
*/
dev->link[link].secondary = ++max;
dev->link[link].subordinate = 0xff;
/* Read the existing primary/secondary/subordinate bus
* number configuration.
*/
busses = pci_read_config32(dev, dev->link[link].cap + 0x14);
config_busses = f1_read_config32(config_reg);
/* Configure the bus numbers for this bridge: the configuration
* transactions will not be propagates by the bridge if it is not
* correctly configured
*/
busses &= 0xff000000;
busses |= (((unsigned int)(dev->bus->secondary) << 0) |
((unsigned int)(dev->link[link].secondary) << 8) |
((unsigned int)(dev->link[link].subordinate) << 16));
pci_write_config32(dev, dev->link[link].cap + 0x14, busses);
config_busses &= 0x000fc88;
config_busses |=
(3 << 0) | /* rw enable, no device compare */
(( nodeid & 7) << 4) |
(( link & 3 ) << 8) |
((dev->link[link].secondary) << 16) |
((dev->link[link].subordinate) << 24);
f1_write_config32(config_reg, config_busses);
#if 0
printk_debug("%s Hyper transport scan link: %d max: %d\n",
dev_path(dev), link, max);
#endif
/* Now we can scan all of the subordinate busses i.e. the chain on the hypertranport link */
max = hypertransport_scan_chain(&dev->link[link], max);
#if 0
printk_debug("%s Hyper transport scan link: %d new max: %d\n",
dev_path(dev), link, max);
#endif
/* We know the number of busses behind this bridge. Set the subordinate
* bus number to it's real value
*/
dev->link[link].subordinate = max;
busses = (busses & 0xff00ffff) |
((unsigned int) (dev->link[link].subordinate) << 16);
pci_write_config32(dev, dev->link[link].cap + 0x14, busses);
config_busses = (config_busses & 0x00ffffff) | (dev->link[link].subordinate << 24);
f1_write_config32(config_reg, config_busses);
#if 0
printk_debug("%s Hypertransport scan link: %d done\n",
dev_path(dev), link);
#endif
}
#if 0
printk_debug("%s amdk8_scan_chains max: %d done\n",
dev_path(dev), max);
#endif
return max;
}
static int reg_useable(unsigned reg,
device_t goal_dev, unsigned goal_nodeid, unsigned goal_link)
{
struct resource *res;
unsigned nodeid, link;
int result;
res = 0;
for(nodeid = 0; !res && (nodeid < 8); nodeid++) {
device_t dev;
dev = __f0_dev[nodeid];
for(link = 0; !res && (link < 3); link++) {
res = probe_resource(dev, 0x100 + (reg | link));
}
}
result = 2;
if (res) {
result = 0;
if ( (goal_link == (link - 1)) &&
(goal_nodeid == (nodeid - 1)) &&
(res->flags <= 1)) {
result = 1;
}
}
#if 0
printk_debug("reg: %02x result: %d gnodeid: %u glink: %u nodeid: %u link: %u\n",
reg, result,
goal_nodeid, goal_link,
nodeid, link);
#endif
return result;
}
static struct resource *amdk8_find_iopair(device_t dev, unsigned nodeid, unsigned link)
{
struct resource *resource;
unsigned free_reg, reg;
resource = 0;
free_reg = 0;
for(reg = 0xc0; reg <= 0xd8; reg += 0x8) {
int result;
result = reg_useable(reg, dev, nodeid, link);
if (result == 1) {
/* I have been allocated this one */
break;
}
else if (result > 1) {
/* I have a free register pair */
free_reg = reg;
}
}
if (reg > 0xd8) {
reg = free_reg;
}
if (reg > 0) {
resource = new_resource(dev, 0x100 + (reg | link));
}
return resource;
}
static struct resource *amdk8_find_mempair(device_t dev, unsigned nodeid, unsigned link)
{
struct resource *resource;
unsigned free_reg, reg;
resource = 0;
free_reg = 0;
for(reg = 0x80; reg <= 0xb8; reg += 0x8) {
int result;
result = reg_useable(reg, dev, nodeid, link);
if (result == 1) {
/* I have been allocated this one */
break;
}
else if (result > 1) {
/* I have a free register pair */
free_reg = reg;
}
}
if (reg > 0xb8) {
reg = free_reg;
}
if (reg > 0) {
resource = new_resource(dev, 0x100 + (reg | link));
}
return resource;
}
static void amdk8_link_read_bases(device_t dev, unsigned nodeid, unsigned link)
{
struct resource *resource;
/* Initialize the io space constraints on the current bus */
resource = amdk8_find_iopair(dev, nodeid, link);
if (resource) {
resource->base = 0;
resource->size = 0;
resource->align = log2(HT_IO_HOST_ALIGN);
resource->gran = log2(HT_IO_HOST_ALIGN);
resource->limit = 0xffffUL;
resource->flags = IORESOURCE_IO;
compute_allocate_resource(&dev->link[link], resource,
IORESOURCE_IO, IORESOURCE_IO);
}
/* Initialize the prefetchable memory constraints on the current bus */
resource = amdk8_find_mempair(dev, nodeid, link);
if (resource) {
resource->base = 0;
resource->size = 0;
resource->align = log2(HT_MEM_HOST_ALIGN);
resource->gran = log2(HT_MEM_HOST_ALIGN);
resource->limit = 0xffffffffffULL;
resource->flags = IORESOURCE_MEM | IORESOURCE_PREFETCH;
compute_allocate_resource(&dev->link[link], resource,
IORESOURCE_MEM | IORESOURCE_PREFETCH,
IORESOURCE_MEM | IORESOURCE_PREFETCH);
}
/* Initialize the memory constraints on the current bus */
resource = amdk8_find_mempair(dev, nodeid, link);
if (resource) {
resource->base = 0;
resource->size = 0;
resource->align = log2(HT_MEM_HOST_ALIGN);
resource->gran = log2(HT_MEM_HOST_ALIGN);
resource->limit = 0xffffffffffULL;
resource->flags = IORESOURCE_MEM;
compute_allocate_resource(&dev->link[link], resource,
IORESOURCE_MEM | IORESOURCE_PREFETCH,
IORESOURCE_MEM);
}
}
static void amdk8_read_resources(device_t dev)
{
unsigned nodeid, link;
nodeid = amdk8_nodeid(dev);
for(link = 0; link < dev->links; link++) {
if (dev->link[link].children) {
amdk8_link_read_bases(dev, nodeid, link);
}
}
}
static void amdk8_set_resource(device_t dev, struct resource *resource, unsigned nodeid)
{
resource_t rbase, rend;
unsigned reg, link;
char buf[50];
/* Make certain the resource has actually been set */
if (!(resource->flags & IORESOURCE_ASSIGNED)) {
return;
}
/* If I have already stored this resource don't worry about it */
if (resource->flags & IORESOURCE_STORED) {
return;
}
/* Only handle PCI memory and IO resources */
if (!(resource->flags & (IORESOURCE_MEM | IORESOURCE_IO)))
return;
/* Ensure I am actually looking at a resource of function 1 */
if (resource->index < 0x100) {
return;
}
/* Get the base address */
rbase = resource->base;
/* Get the limit (rounded up) */
rend = resource_end(resource);
/* Get the register and link */
reg = resource->index & 0xfc;
link = resource->index & 3;
if (resource->flags & IORESOURCE_IO) {
uint32_t base, limit;
compute_allocate_resource(&dev->link[link], resource,
IORESOURCE_IO, IORESOURCE_IO);
base = f1_read_config32(reg);
limit = f1_read_config32(reg + 0x4);
base &= 0xfe000fcc;
base |= rbase & 0x01fff000;
base |= 3;
limit &= 0xfe000fc8;
limit |= rend & 0x01fff000;
limit |= (link & 3) << 4;
limit |= (nodeid & 7);
if (dev->link[link].bridge_ctrl & PCI_BRIDGE_CTL_VGA) {
base |= PCI_IO_BASE_VGA_EN;
}
if (dev->link[link].bridge_ctrl & PCI_BRIDGE_CTL_NO_ISA) {
base |= PCI_IO_BASE_NO_ISA;
}
f1_write_config32(reg + 0x4, limit);
f1_write_config32(reg, base);
}
else if (resource->flags & IORESOURCE_MEM) {
uint32_t base, limit;
compute_allocate_resource(&dev->link[link], resource,
IORESOURCE_MEM | IORESOURCE_PREFETCH,
resource->flags & (IORESOURCE_MEM | IORESOURCE_PREFETCH));
base = f1_read_config32(reg);
limit = f1_read_config32(reg + 0x4);
base &= 0x000000f0;
base |= (rbase >> 8) & 0xffffff00;
base |= 3;
limit &= 0x00000048;
limit |= (rend >> 8) & 0xffffff00;
limit |= (link & 3) << 4;
limit |= (nodeid & 7);
f1_write_config32(reg + 0x4, limit);
f1_write_config32(reg, base);
}
resource->flags |= IORESOURCE_STORED;
sprintf(buf, " <node %d link %d>",
nodeid, link);
report_resource_stored(dev, resource, buf);
}
static void amdk8_set_resources(device_t dev)
{
unsigned nodeid, link;
int i;
/* Find the nodeid */
nodeid = amdk8_nodeid(dev);
/* Set each resource we have found */
for(i = 0; i < dev->resources; i++) {
amdk8_set_resource(dev, &dev->resource[i], nodeid);
}
for(link = 0; link < dev->links; link++) {
struct bus *bus;
bus = &dev->link[link];
if (bus->children) {
assign_resources(bus);
}
}
}
static void mcf0_control_init(struct device *dev)
{
uint32_t cmd;
#if 0
printk_debug("NB: Function 0 Misc Control.. ");
#endif
#if 1
/* improve latency and bandwith on HT */
cmd = pci_read_config32(dev, 0x68);
cmd &= 0xffff80ff;
cmd |= 0x00004800;
pci_write_config32(dev, 0x68, cmd );
#endif
#if 0
/* over drive the ht port to 1000 Mhz */
cmd = pci_read_config32(dev, 0xa8);
cmd &= 0xfffff0ff;
cmd |= 0x00000600;
pci_write_config32(dev, 0xdc, cmd );
#endif
printk_debug("done.\n");
}
static struct device_operations northbridge_operations = {
.read_resources = amdk8_read_resources,
.set_resources = amdk8_set_resources,
.enable_resources = pci_dev_enable_resources,
.init = mcf0_control_init,
.scan_bus = amdk8_scan_chains,
.enable = 0,
.ops_pci = 0,
};
static struct pci_driver mcf0_driver __pci_driver = {
.ops = &northbridge_operations,
.vendor = PCI_VENDOR_ID_AMD,
.device = 0x1100,
};
#define BRIDGE_IO_MASK (IORESOURCE_IO | IORESOURCE_MEM | IORESOURCE_PREFETCH)
static void pci_domain_read_resources(device_t dev)
{
struct resource *resource;
unsigned reg;
/* Find the already assigned resource pairs */
get_fx_devs();
for(reg = 0x80; reg <= 0xd8; reg+= 0x08) {
uint32_t base, limit;
base = f1_read_config32(reg);
limit = f1_read_config32(reg + 0x04);
/* Is this register allocated? */
if ((base & 3) != 0) {
unsigned nodeid, link;
device_t dev;
nodeid = limit & 7;
link = (limit >> 4) & 3;
dev = __f0_dev[nodeid];
if (dev) {
/* Reserve the resource */
struct resource *resource;
resource = new_resource(dev, 0x100 + (reg | link));
if (resource) {
resource->flags = 1;
}
}
}
}
/* Initialize the system wide io space constraints */
resource = new_resource(dev, 0);
resource->base = 0x400;
resource->limit = 0xffffUL;
resource->flags = IORESOURCE_IO;
compute_allocate_resource(&dev->link[0], resource,
IORESOURCE_IO, IORESOURCE_IO);
/* Initialize the system wide prefetchable memory resources constraints */
resource = new_resource(dev, 1);
resource->limit = 0xfcffffffffULL;
resource->flags = IORESOURCE_MEM | IORESOURCE_PREFETCH;
compute_allocate_resource(&dev->link[0], resource,
IORESOURCE_MEM | IORESOURCE_PREFETCH,
IORESOURCE_MEM | IORESOURCE_PREFETCH);
/* Initialize the system wide memory resources constraints */
resource = new_resource(dev, 2);
resource->limit = 0xfcffffffffULL;
resource->flags = IORESOURCE_MEM;
compute_allocate_resource(&dev->link[0], resource,
IORESOURCE_MEM | IORESOURCE_PREFETCH,
IORESOURCE_MEM);
}
static void ram_resource(device_t dev, unsigned long index,
unsigned long basek, unsigned long sizek)
{
struct resource *resource;
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 pci_domain_set_resources(device_t dev)
{
struct resource *io, *mem1, *mem2;
struct resource *resource, *last;
unsigned long mmio_basek;
uint32_t pci_tolm;
int i, idx;
#if 0
/* Place the IO devices somewhere safe */
io = find_resource(dev, 0);
io->base = DEVICE_IO_START;
#endif
#if 1
/* Now reallocate the pci resources memory with the
* highest addresses I can manage.
*/
mem1 = find_resource(dev, 1);
mem2 = find_resource(dev, 2);
/* See if both resources have roughly the same limits */
if (((mem1->limit <= 0xffffffff) && (mem2->limit <= 0xffffffff)) ||
((mem1->limit > 0xffffffff) && (mem2->limit > 0xffffffff)))
{
/* If so place the one with the most stringent alignment first
*/
if (mem2->align > mem1->align) {
struct resource *tmp;
tmp = mem1;
mem1 = mem2;
mem2 = mem1;
}
/* Now place the memory as high up as it will go */
mem2->base = resource_max(mem2);
mem1->limit = mem2->base - 1;
mem1->base = resource_max(mem1);
}
else {
/* Place the resources as high up as they will go */
mem2->base = resource_max(mem2);
mem1->base = resource_max(mem1);
}
#if 0
printk_debug("base1: 0x%08Lx limit1: 0x%08lx size: 0x%08Lx\n",
mem1->base, mem1->limit, mem1->size);
printk_debug("base2: 0x%08Lx limit2: 0x%08Lx size: 0x%08Lx\n",
mem2->base, mem2->limit, mem2->size);
#endif
#endif
pci_tolm = 0xffffffffUL;
last = &dev->resource[dev->resources];
for(resource = &dev->resource[0]; resource < last; resource++)
{
#if 1
resource->flags |= IORESOURCE_ASSIGNED;
resource->flags &= ~IORESOURCE_STORED;
#endif
compute_allocate_resource(&dev->link[0], resource,
BRIDGE_IO_MASK, resource->flags & BRIDGE_IO_MASK);
resource->flags |= IORESOURCE_STORED;
report_resource_stored(dev, resource, "");
if ((resource->flags & IORESOURCE_MEM) &&
(pci_tolm > resource->base))
{
pci_tolm = resource->base;
}
}
#warning "FIXME handle interleaved nodes"
mmio_basek = pci_tolm >> 10;
/* Round mmio_basek to something the processor can support */
mmio_basek &= ~((1 << 6) -1);
#if 1
#warning "FIXME improve mtrr.c so we don't use up all of the mtrrs with a 64M MMIO hole"
/* Round the mmio hold to 64M */
mmio_basek &= ~((64*1024) - 1);
#endif
idx = 10;
for(i = 0; i < 8; i++) {
uint32_t base, limit;
unsigned basek, limitk, sizek;
base = f1_read_config32(0x40 + (i << 3));
limit = f1_read_config32(0x44 + (i << 3));
if ((base & ((1<<1)|(1<<0))) != ((1<<1)|(1<<0))) {
continue;
}
basek = (base & 0xffff0000) >> 2;
limitk = ((limit + 0x00010000) & 0xffff0000) >> 2;
sizek = limitk - basek;
/* see if we need a hole from 0xa0000 to 0xbffff */
if ((basek < ((8*64)+(8*16))) && (sizek > ((8*64)+(16*16)))) {
ram_resource(dev, idx++, basek, ((8*64)+(8*16)) - basek);
basek = (8*64)+(16*16);
sizek = limitk - ((8*64)+(16*16));
}
/* See if I need to split the region to accomodate pci memory space */
if ((basek < mmio_basek) && (limitk > mmio_basek)) {
if (basek < mmio_basek) {
unsigned pre_sizek;
pre_sizek = mmio_basek - basek;
ram_resource(dev, idx++, basek, pre_sizek);
sizek -= pre_sizek;
basek = mmio_basek;
}
if ((basek + sizek) <= 4*1024*1024) {
sizek = 0;
}
else {
basek = 4*1024*1024;
sizek -= (4*1024*1024 - mmio_basek);
}
}
ram_resource(dev, idx++, basek, sizek);
}
assign_resources(&dev->link[0]);
}
static unsigned int pci_domain_scan_bus(device_t dev, unsigned int max)
{
unsigned reg;
int i;
/* Unmap all of the HT chains */
for(reg = 0xe0; reg <= 0xec; reg += 4) {
f1_write_config32(reg, 0);
}
max = pci_scan_bus(&dev->link[0], PCI_DEVFN(0x18, 0), 0xff, max);
return max;
}
static struct device_operations pci_domain_ops = {
.read_resources = pci_domain_read_resources,
.set_resources = pci_domain_set_resources,
.enable_resources = enable_childrens_resources,
.init = 0,
.scan_bus = pci_domain_scan_bus,
};
static unsigned int cpu_bus_scan(device_t dev, unsigned int max)
{
struct bus *cpu_bus;
unsigned reg;
int i;
/* Find which cpus are present */
cpu_bus = &dev->link[0];
for(i = 0; i < 7; i++) {
device_t dev, cpu;
struct device_path cpu_path;
/* Find the cpu's memory controller */
dev = dev_find_slot(0, PCI_DEVFN(0x18 + i, 0));
/* Build the cpu device path */
cpu_path.type = DEVICE_PATH_APIC;
cpu_path.u.apic.apic_id = i;
/* See if I can find the cpu */
cpu = find_dev_path(cpu_bus, &cpu_path);
/* Enable the cpu if I have the processor */
if (dev && dev->enabled) {
if (!cpu) {
cpu = alloc_dev(cpu_bus, &cpu_path);
}
if (cpu) {
cpu->enabled = 1;
}
}
/* Disable the cpu if I don't have the processor */
if (cpu && (!dev || !dev->enabled)) {
cpu->enabled = 0;
}
/* Report what I have done */
if (cpu) {
printk_debug("CPU: %s %s\n",
dev_path(cpu), cpu->enabled?"enabled":"disabled");
}
}
return max;
}
static void cpu_bus_init(device_t dev)
{
initialize_cpus(&dev->link[0]);
}
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 = cpu_bus_scan,
};
static void enable_dev(struct device *dev)
{
struct device_path path;
/* Set the operations if it is a special bus type */
if (dev->path.type == DEVICE_PATH_PCI_DOMAIN) {
dev->ops = &pci_domain_ops;
}
else if (dev->path.type == DEVICE_PATH_APIC_CLUSTER) {
dev->ops = &cpu_bus_ops;
}
}
struct chip_operations northbridge_amd_amdk8_ops = {
.name = "AMD K8 Northbridge",
.enable_dev = enable_dev,
};
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