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-rw-r--r--src/northbridge/intel/e7501/northbridge.c266
1 files changed, 264 insertions, 2 deletions
diff --git a/src/northbridge/intel/e7501/northbridge.c b/src/northbridge/intel/e7501/northbridge.c
index 6ad5973a86..6b35eaf720 100644
--- a/src/northbridge/intel/e7501/northbridge.c
+++ b/src/northbridge/intel/e7501/northbridge.c
@@ -9,7 +9,7 @@
#include <string.h>
#include <bitops.h>
#include "chip.h"
-
+#if 0
struct mem_range *sizeram(void)
{
static struct mem_range mem[4];
@@ -113,7 +113,269 @@ struct mem_range *sizeram(void)
return mem;
}
+#endif
+
+#define BRIDGE_IO_MASK (IORESOURCE_IO | IORESOURCE_MEM | IORESOURCE_PREFETCH)
+
+static void pci_domain_read_resources(device_t dev)
+{
+ struct resource *resource;
+ unsigned reg;
+
+ /* 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 idx;
+ uint8_t drb;
+ unsigned basek, sizek;
+ device_t dev_memctrl;
+
+#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);
+
+#if 1
+ printk_debug("base1: 0x%08Lx limit1: 0x%08Lx size: 0x%08Lx align: %d\n",
+ mem1->base, mem1->limit, mem1->size, mem1->align);
+ printk_debug("base2: 0x%08Lx limit2: 0x%08Lx size: 0x%08Lx align: %d\n",
+ mem2->base, mem2->limit, mem2->size, mem2->align);
+#endif
+
+ /* 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 = tmp;
+ }
+ /* 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 1
+ printk_debug("base1: 0x%08Lx limit1: 0x%08Lx size: 0x%08Lx align: %d\n",
+ mem1->base, mem1->limit, mem1->size, mem1->align);
+ printk_debug("base2: 0x%08Lx limit2: 0x%08Lx size: 0x%08Lx align: %d\n",
+ mem2->base, mem2->limit, mem2->size, mem2->align);
+#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
+
+ dev_memctrl = dev_find_slot(0, 0); // d0f0
+ drb = pci_read_config8(dev_memctrl, 0x67);
-struct chip_operations northbridge_intel_e7501_control = {
+ idx = 10;
+
+ basek = 0;
+ sizek = 640;
+ ram_resource(dev, idx++, basek, sizek);
+
+ basek = 768;
+ sizek = mmio_basek - basek;
+ ram_resource(dev, idx++, basek, sizek);
+
+ if ((drb << 16) > mmio_basek) {
+ /* We don't need to consider the remap window
+ * here because we put it immediately after the
+ * rest of ram.
+ * All we must do is calculate the amount
+ * of unused memory and report it at 4GB.
+ */
+ basek = 4096*1024;
+ sizek = (drb << 16) - 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)
+{
+ max = pci_scan_bus(&dev->link[0], PCI_DEVFN(0, 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+=6) {
+ device_t dev, cpu;
+ struct device_path cpu_path;
+#if 0
+//How to identify Intel CPU
+ /* Find the cpu's memory controller */
+ dev = dev_find_slot(0, PCI_DEVFN(0x18 + i, 0));
+#endif
+
+ /* 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);
+#if 0
+ /* 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;
+ }
+#else
+ cpu->enabled = 1;
+#endif
+ /* 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_intel_e7501_ops = {
.name = "intel E7501 Northbridge",
+ .enable_dev = enable_dev,
};
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-30 05:40:11 +0000