/* * This file needs a major cleanup. Too much #if 0 code */ #include #include #include #include #include #include #include #include #include #include #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, };