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Diffstat (limited to 'src/northbridge/amd/amdk8/misc_control.c')
-rw-r--r--src/northbridge/amd/amdk8/misc_control.c198
1 files changed, 148 insertions, 50 deletions
diff --git a/src/northbridge/amd/amdk8/misc_control.c b/src/northbridge/amd/amdk8/misc_control.c
index fe797aa580..df28bd0331 100644
--- a/src/northbridge/amd/amdk8/misc_control.c
+++ b/src/northbridge/amd/amdk8/misc_control.c
@@ -14,21 +14,96 @@
#include <device/pci.h>
#include <device/pci_ids.h>
#include <device/pci_ops.h>
+#include <part/hard_reset.h>
#include "./cpu_rev.c"
+#include "amdk8.h"
+
+#define IOMMU_APETURE_SIZE (64*1024*1024) /* 64M */
+static void mcf3_read_resources(device_t dev)
+{
+ struct resource *resource;
+ /* Read the generic PCI resources */
+ pci_dev_read_resources(dev);
+
+ /* If we are not the first processor don't allocate the gart apeture */
+ if (dev->path.u.pci.devfn != PCI_DEVFN(24, 3)) {
+ return;
+ }
+
+ /* Add a 64M Gart apeture resource */
+ if (dev->resources < MAX_RESOURCES) {
+ resource = &dev->resource[dev->resources];
+ dev->resources++;
+ resource->base = 0;
+ resource->size = IOMMU_APETURE_SIZE;
+ resource->align = log2(resource->size);
+ resource->gran = log2(resource->size);
+ resource->limit = 0xffffffff; /* 4G */
+ resource->flags = IORESOURCE_MEM;
+ resource->index = 0x94;
+ }
+ else {
+ printk_err("%s Unexpeted resource shortage\n", dev_path(dev));
+ }
+}
+
+static void mcf3_set_resources(device_t dev)
+{
+ struct resource *resource, *last;
+ last = &dev->resource[dev->resources];
+ for(resource = &dev->resource[0]; resource < last; resource++) {
+ if (resource->index == 0x94) {
+ device_t pdev;
+ uint32_t base;
+ uint32_t size;
+
+ size = (0<<6)|(0<<5)|(0<<4)|((log2(resource->size) - 25) << 1)|(0<<0);
+ base = ((resource->base) >> 25) & 0x00007fff;
+
+ pdev = 0;
+ while(pdev = dev_find_device(PCI_VENDOR_ID_AMD, 0x1103, pdev)) {
+ /* I want a 64M GART apeture */
+ pci_write_config32(pdev, 0x90, (0<<6)|(0<<5)|(0<<4)|(1<<1)|(0<<0));
+ /* Store the GART base address */
+ pci_write_config32(pdev, 0x94, base);
+ /* Don't set the GART Table base address */
+ pci_write_config32(pdev, 0x98, 0);
+
+ printk_debug(
+ "%s %02x <- [0x%08lx - 0x%08lx] mem <gart>\n",
+ dev_path(pdev),
+ resource->index,
+ resource->base, resource->base + resource->size - 1);
+ }
+ /* Remember this resource has been stored */
+ resource->flags |= IORESOURCE_STORED;
+
+ }
+ }
+ /* Set the generic PCI resources */
+ pci_dev_set_resources(dev);
+}
-static cpu_reset_count = 0;
static void misc_control_init(struct device *dev)
{
- uint32_t cmd;
+ uint32_t cmd, cmd_ref;
+ int needs_reset;
+ struct device *f0_dev, *f2_dev;
printk_debug("NB: Function 3 Misc Control.. ");
-
- /* disable error reporting */
+ needs_reset = 0;
+
+ /* Disable Machine checks from Invalid Locations.
+ * This is needed for PC backwards compatibility.
+ */
cmd = pci_read_config32(dev, 0x44);
cmd |= (1<<6) | (1<<25);
pci_write_config32(dev, 0x44, cmd );
if (is_cpu_pre_c0()) {
- /* errata 58 */
+
+ /* Errata 58
+ * Disable CPU low power states C2, C1 and throttling
+ */
cmd = pci_read_config32(dev, 0x80);
cmd &= ~(1<<0);
pci_write_config32(dev, 0x80, cmd );
@@ -36,62 +111,86 @@ static void misc_control_init(struct device *dev)
cmd &= ~(1<<24);
cmd &= ~(1<<8);
pci_write_config32(dev, 0x84, cmd );
- /* errata 66 */
+
+ /* Errata 66
+ * Limit the number of downstream posted requests to 1
+ */
cmd = pci_read_config32(dev, 0x70);
- cmd &= ~(1<<0);
- cmd |= (1<<1);
- pci_write_config32(dev, 0x70, cmd );
+ if ((cmd & (3 << 0)) != 2) {
+ cmd &= ~(3<<0);
+ cmd |= (2<<0);
+ pci_write_config32(dev, 0x70, cmd );
+ needs_reset = 1;
+ }
cmd = pci_read_config32(dev, 0x7c);
- cmd &= ~(3<<4);
- pci_write_config32(dev, 0x7c, cmd );
+ if ((cmd & (3 << 4)) != 0) {
+ cmd &= ~(3<<4);
+ cmd |= (0<<4);
+ pci_write_config32(dev, 0x7c, cmd );
+ needs_reset = 1;
+ }
+ /* Clock Power/Timing Low */
+ cmd = pci_read_config32(dev, 0xd4);
+ if (cmd != 0x000D0001) {
+ cmd = 0x000D0001;
+ pci_write_config32(dev, 0xd4, cmd);
+ needs_reset = 1; /* Needed? */
+ }
}
else {
- /* errata 98 */
-#if 0
+ uint32_t dcl;
+ f2_dev = dev_find_slot(0, dev->path.u.pci.devfn - 3 + 2);
+ /* Errata 98
+ * Set Clk Ramp Hystersis to 7
+ * Clock Power/Timing Low
+ */
+ cmd_ref = 0x04e20707; /* Registered */
+ dcl = pci_read_config32(f2_dev, DRAM_CONFIG_LOW);
+ if (dcl & DCL_UnBufDimm) {
+ cmd_ref = 0x000D0701; /* Unbuffered */
+ }
cmd = pci_read_config32(dev, 0xd4);
- if(cmd != 0x04e20707) {
- cmd = 0x04e20707;
- pci_write_config32(dev, 0xd4, cmd );
- hard_reset();
+ if(cmd != cmd_ref) {
+ pci_write_config32(dev, 0xd4, cmd_ref );
+ needs_reset = 1; /* Needed? */
}
-#endif
-
- cmd = 0x04e20707;
- pci_write_config32(dev, 0xd4, cmd );
}
-
-/*
- * FIXME: This preprocessor check is a mere workaround.
- * The right fix is to walk over all links on all nodes
- * and set the FIFO read pointer optimization value to
- * 0x25 for each link connected to an AMD HT device.
- *
- * The reason this is only enabled for machines with more
- * than one CPU is that Athlon64 machines don't have the
- * link at all that is optimized in the code.
- */
-
-#if CONFIG_MAX_CPUS > 1
-#if HAVE_HARD_RESET==1
- cpu_reset_count++;
- cmd = pci_read_config32(dev, 0xdc);
- if((cmd & 0x0000ff00) != 0x02500) {
- cmd &= 0xffff00ff;
- cmd |= 0x00002500;
- pci_write_config32(dev, 0xdc, cmd );
- if(cpu_reset_count==CONFIG_MAX_CPUS) {
- printk_debug("resetting cpu\n");
- hard_reset();
+ /* Optimize the Link read pointers */
+ f0_dev = dev_find_slot(0, dev->path.u.pci.devfn - 3);
+ if (f0_dev) {
+ int link;
+ cmd_ref = cmd = pci_read_config32(dev, 0xdc);
+ for(link = 0; link < 3; link++) {
+ uint32_t link_type;
+ unsigned reg;
+ /* This works on an Athlon64 because unimplemented links return 0 */
+ reg = 0x98 + (link * 0x20);
+ link_type = pci_read_config32(f0_dev, reg);
+ if (link_type & LinkConnected) {
+ cmd &= 0xff << (link *8);
+ /* FIXME this assumes the device on the other side is an AMD device */
+ cmd |= 0x25 << (link *8);
+ }
+ }
+ if (cmd != cmd_ref) {
+ pci_write_config32(dev, 0xdc, cmd);
+ needs_reset = 1;
}
- }
-#endif
-#endif
+ }
+ else {
+ printk_err("Missing f0 device!\n");
+ }
+ if (needs_reset) {
+ printk_debug("resetting cpu\n");
+ hard_reset();
+ }
printk_debug("done.\n");
}
+
static struct device_operations mcf3_ops = {
- .read_resources = pci_dev_read_resources,
- .set_resources = pci_dev_set_resources,
+ .read_resources = mcf3_read_resources,
+ .set_resources = mcf3_set_resources,
.enable_resources = pci_dev_enable_resources,
.init = misc_control_init,
.scan_bus = 0,
@@ -102,4 +201,3 @@ static struct pci_driver mcf3_driver __pci_driver = {
.vendor = PCI_VENDOR_ID_AMD,
.device = 0x1103,
};
-
generated by cgit v1.2.3 (git 2.39.1) at 2024-08-25 00:06:00 +0000