1 #include <console/console.h>
4 #include <device/device.h>
5 #include <device/pci.h>
6 #include <device/pci_ids.h>
11 #include "northbridge.h"
12 #include <cpu/amd/gx2def.h>
13 #include <cpu/x86/msr.h>
14 #include <cpu/x86/cache.h>
16 #define NORTHBRIDGE_FILE "northbridge.c"
18 /* number of MB to take off the top of ram for VSM and display memory.
19 * FIXME -- make this configurable
25 /* todo: add a resource record. We don't do this here because this may be called when
26 * very little of the platform is actually working.
35 msr = rdmsr(0x20000018);
36 printk_debug("sizeram: %08x:%08x\n", msr.hi, msr.lo);
42 sizem = (1 << ((dimm >> 12)-1)) * 8;
49 sizem += (1 << ((dimm >> 12)-1)) * 8;
51 printk_debug("sizeram: sizem 0x%x\n", sizem);
56 /* here is programming for the various MSRs.*/
57 #define IM_QWAIT 0x100000
59 #define DMCF_WRITE_SERIALIZE_REQUEST (2<<12) /* 2 outstanding */ /* in high */
60 #define DMCF_SERIAL_LOAD_MISSES (2) /* enabled */
62 /* these are the 8-bit attributes for controlling RCONF registers */
63 #define CACHE_DISABLE (1<<0)
64 #define WRITE_ALLOCATE (1<<1)
65 #define WRITE_PROTECT (1<<2)
66 #define WRITE_THROUGH (1<<3)
67 #define WRITE_COMBINE (1<<4)
68 #define WRITE_SERIALIZE (1<<5)
70 /* ram has none of this stuff */
71 #define RAM_PROPERTIES (0)
72 #define DEVICE_PROPERTIES (WRITE_SERIALIZE|CACHE_DISABLE)
73 #define ROM_PROPERTIES (WRITE_SERIALIZE|WRITE_THROUGH|CACHE_DISABLE)
74 #define MSR_WS_CD_DEFAULT (0x21212121)
76 /* 1810-1817 give you 8 registers with which to program protection regions */
77 /* the are region configuration range registers, or RRCF */
78 /* in msr terms, the are a straight base, top address assign, since they are 4k aligned. */
79 /* so no left-shift needed for top or base */
80 #define RRCF_LOW(base,properties) (base|(1<<8)|properties)
81 #define RRCF_LOW_CD(base) RRCF_LOW(base, CACHE_DISABLE)
83 /* build initializer for P2D MSR */
84 #define P2D_BM(msr, pdid1, bizarro, pbase, pmask) {msr, {.hi=(pdid1<<29)|(bizarro<<28)|(pbase>>24), .lo=(pbase<<8)|pmask}}
85 #define P2D_BMO(msr, pdid1, bizarro, poffset, pbase, pmask) {msr, {.hi=(pdid1<<29)|(bizarro<<28)|(poffset<<8)|(pbase>>24), .lo=(pbase<<8)|pmask}}
86 #define P2D_R(msr, pdid1, bizarro, pmax, pmin) {msr, {.hi=(pdid1<<29)|(bizarro<<28)|(pmax>>12), .lo=(pmax<<20)|pmin}}
87 #define P2D_RO(msr, pdid1, bizarro, poffset, pmax, pmin) {msr, {.hi=(pdid1<<29)|(bizarro<<28)|(poffset<<8)|(pmax>>12), .lo=(pmax<<20)|pmin}}
88 #define P2D_SC(msr, pdid1, bizarro, wen, ren,pscbase) {msr, {.hi=(pdid1<<29)|(bizarro<<28)|(wen), .lo=(ren<<16)|(pscbase>>18)}}
89 #define IOD_BM(msr, pdid1, bizarro, ibase, imask) {msr, {.hi=(pdid1<<29)|(bizarro<<28)|(ibase>>12), .lo=(ibase<<20)|imask}}
90 #define IOD_SC(msr, pdid1, bizarro, en, wen, ren, ibase) {msr, {.hi=(pdid1<<29)|(bizarro<<28), .lo=(en<<24)|(wen<<21)|(ren<<20)|(ibase<<3)}}
98 {0x1700, {.hi = 0, .lo = IM_QWAIT}},
99 {0x1800, {.hi = DMCF_WRITE_SERIALIZE_REQUEST, .lo = DMCF_SERIAL_LOAD_MISSES}},
100 /* 1808 will be done down below, so we have to do 180a->1817 (well, 1813 really) */
101 /* for 180a, for now, we assume VSM will configure it */
102 /* 180b is left at reset value,a0000-bffff is non-cacheable */
103 /* 180c, c0000-dffff is set to write serialize and non-cachable */
104 /* oops, 180c will be set by cpu bug handling in cpubug.c */
105 //{0x180c, {.hi = MSR_WS_CD_DEFAULT, .lo = MSR_WS_CD_DEFAULT}},
106 /* 180d is left at default, e0000-fffff is non-cached */
108 /* we will assume 180e, the ssm region configuration, is left at default or set by VSM */
109 /* we will not set 0x180f, the DMM,yet */
110 //{0x1810, {.hi=0xee7ff000, .lo=RRCF_LOW(0xee000000, WRITE_COMBINE|CACHE_DISABLE)}},
111 //{0x1811, {.hi = 0xefffb000, .lo = RRCF_LOW_CD(0xefff8000)}},
112 //{0x1812, {.hi = 0xefff7000, .lo = RRCF_LOW_CD(0xefff4000)}},
113 //{0x1813, {.hi = 0xefff3000, .lo = RRCF_LOW_CD(0xefff0000)}},
114 /* now for GLPCI routing */
116 P2D_BM(0x10000020, 0x1, 0x0, 0x0, 0xfff80),
117 P2D_BM(0x10000021, 0x1, 0x0, 0x80000, 0xfffe0),
118 P2D_SC(0x1000002c, 0x1, 0x0, 0x0, 0xff03, 0x3),
120 P2D_BM(0x40000020, 0x1, 0x0, 0x0, 0xfff80),
121 P2D_BM(0x40000021, 0x1, 0x0, 0x80000, 0xfffe0),
122 P2D_SC(0x4000002d, 0x1, 0x0, 0x0, 0xff03, 0x3),
128 setup_gx2_cache(void)
131 unsigned long long val;
132 int sizembytes, sizereg;
134 sizembytes = sizeram();
135 printk_debug("enable_cache: enable for %dm bytes\n", sizembytes);
136 /* build up the rconf word. */
137 /* the SYSTOP bits 27:8 are actually the top bits from 31:12. Book fails to say that */
139 val = ((unsigned long long) ROM_PROPERTIES) << 56;
140 /* make rom base useful for 1M roms */
141 /* Flash base address -- sized for 1/2M for now*/
142 val |= ((unsigned long long) 0xfff800)<<36;
143 /* set the devrp properties */
144 val |= ((unsigned long long) DEVICE_PROPERTIES) << 28;
145 /* sigh. Take our TOM, RIGHT shift 12, since it page-aligned, then LEFT-shift 8 for reg. */
146 /* yank off 8M for frame buffer and 1M for VSA */
147 sizembytes -= RAMADJUSTMB;
148 sizereg = sizembytes;
153 val |= RAM_PROPERTIES;
155 msr.hi = (val >> 32);
156 printk_debug("msr will be set to %x:%x\n", msr.hi, msr.lo);
157 wrmsr(CPU_RCONF_DEFAULT, msr);
164 #define SMM_OFFSET 0x40400000
167 /* we have to do this here. We have not found a nicer way to do it */
172 unsigned long tmp, tmp2, tmp3;
174 unsigned long sizem, membytes;
176 sizem = setup_gx2_cache();
178 membytes = sizem * 1048576;
180 /* we need to set 0x10000028 and 0x40000029 */
181 printk_debug("sizem 0x%x, membytes 0x%x\n", sizem, membytes);
182 msr.hi = 0x20000000 | membytes>>24;
183 msr.lo = 0x100 | ( ((membytes >>12) & 0xfff) << 20);
184 wrmsr(0x10000028, msr);
185 msr.hi = 0x20000000 | membytes>>24;
186 msr.lo = 0x100 | ( ((membytes >>12) & 0xfff) << 20);
187 wrmsr(0x40000029, msr);
188 msr = rdmsr(0x10000028);
189 printk_debug("MSR 0x%x is now 0x%x:0x%x\n", 0x10000028, msr.hi,msr.lo);
190 msr = rdmsr(0x40000029);
191 printk_debug("MSR 0x%x is now 0x%x:0x%x\n", 0x40000029, msr.hi,msr.lo);
194 /* fixme: SMM MSR 0x10000026 and 0x400000023 */
195 /* calculate the OFFSET field */
196 tmp = membytes - SMM_OFFSET;
200 tmp |= (SMM_OFFSET >> 24);
202 /* calculate the PBASE and PMASK fields */
203 tmp2 = (SMM_OFFSET << 8) & 0xFFF00000; /* shift right 12 then left 20 == left 8 */
204 tmp2 |= (((~(SMM_SIZE * 1024) + 1) >> 12) & 0xfffff);
205 printk_debug("MSR 0x%x is now 0x%x:0x%x\n", 0x10000026, tmp, tmp2);
208 wrmsr(0x10000026, msr);
212 wrmsr(0x10000028, msr);
213 msr = rdmsr(0x10000028);
214 printk_debug("MSR 0x%x is now 0x%x:0x%x\n", 0x10000028, msr.hi, msr.lo);
215 wrmsr(0x40000029, msr);
216 msr = rdmsr(0x40000029);
217 printk_debug("MSR 0x%x is now 0x%x:0x%x\n", 0x40000029, msr.hi, msr.lo);
221 wrmsr(0x10000026, msr);
222 msr = rdmsr(0x10000026);
223 printk_debug("MSR 0x%x is now 0x%x:0x%x\n", 0x10000026, msr.hi, msr.lo);
229 printk_debug("MSR 0x%x is now 0x%x:0x%x\n", 0x1808, msr.hi, msr.lo);
231 /* now do the default MSR values */
232 for(i = 0; msr_defaults[i].msr_no; i++) {
234 wrmsr(msr_defaults[i].msr_no, msr_defaults[i].msr);
235 msr = rdmsr(msr_defaults[i].msr_no);
236 printk_debug("MSR 0x%x is now 0x%x:0x%x\n", msr_defaults[i].msr_no, msr.hi,msr.lo);
240 static void enable_shadow(device_t dev)
245 static void northbridge_init(device_t dev)
247 printk_debug("northbridge: %s()\n", __FUNCTION__);
252 static struct device_operations northbridge_operations = {
253 .read_resources = pci_dev_read_resources,
254 .set_resources = pci_dev_set_resources,
255 .enable_resources = pci_dev_enable_resources,
256 .init = northbridge_init,
261 static struct pci_driver northbridge_driver __pci_driver = {
262 .ops = &northbridge_operations,
263 .vendor = PCI_VENDOR_ID_NS,
264 .device = PCI_DEVICE_ID_NS_GX2,
267 #define BRIDGE_IO_MASK (IORESOURCE_IO | IORESOURCE_MEM)
269 static void pci_domain_read_resources(device_t dev)
271 struct resource *resource;
273 printk_spew("%s:%s()\n", NORTHBRIDGE_FILE, __FUNCTION__);
275 /* Initialize the system wide io space constraints */
276 resource = new_resource(dev, IOINDEX_SUBTRACTIVE(0,0));
277 resource->limit = 0xffffUL;
278 resource->flags = IORESOURCE_IO | IORESOURCE_SUBTRACTIVE | IORESOURCE_ASSIGNED;
280 /* Initialize the system wide memory resources constraints */
281 resource = new_resource(dev, IOINDEX_SUBTRACTIVE(1,0));
282 resource->limit = 0xffffffffULL;
283 resource->flags = IORESOURCE_MEM | IORESOURCE_SUBTRACTIVE | IORESOURCE_ASSIGNED;
286 static void ram_resource(device_t dev, unsigned long index,
287 unsigned long basek, unsigned long sizek)
289 struct resource *resource;
294 resource = new_resource(dev, index);
295 resource->base = ((resource_t)basek) << 10;
296 resource->size = ((resource_t)sizek) << 10;
297 resource->flags = IORESOURCE_MEM | IORESOURCE_CACHEABLE | \
298 IORESOURCE_FIXED | IORESOURCE_STORED | IORESOURCE_ASSIGNED;
301 static void tolm_test(void *gp, struct device *dev, struct resource *new)
303 struct resource **best_p = gp;
304 struct resource *best;
306 if (!best || (best->base > new->base)) {
312 static uint32_t find_pci_tolm(struct bus *bus)
314 struct resource *min;
317 search_bus_resources(bus, IORESOURCE_MEM, IORESOURCE_MEM, tolm_test, &min);
319 if (min && tolm > min->base) {
325 #define FRAMEBUFFERK 4096
327 static void pci_domain_set_resources(device_t dev)
332 pci_tolm = find_pci_tolm(&dev->link[0]);
333 mc_dev = dev->link[0].children;
335 unsigned int tomk, tolmk;
336 unsigned int ramreg = 0;
338 unsigned int *bcdramtop = (unsigned int *)(GX_BASE + BC_DRAM_TOP);
339 unsigned int *mcgbaseadd = (unsigned int *)(GX_BASE + MC_GBASE_ADD);
341 for(i=0; i<0x20; i+= 0x10) {
342 unsigned int *mcreg = (unsigned int *)(GX_BASE + MC_BANK_CFG);
343 unsigned int mem_config = *mcreg;
345 if (((mem_config & (DIMM_PG_SZ << i)) >> (4 + i)) == 7)
347 ramreg += 1 << (((mem_config & (DIMM_SZ << i)) >> (i + 8)) + 2);
352 /* Sort out the framebuffer size */
353 tomk -= FRAMEBUFFERK;
354 *bcdramtop = ((tomk << 10) - 1);
355 *mcgbaseadd = (tomk >> 9);
357 printk_debug("BC_DRAM_TOP = 0x%08x\n", *bcdramtop);
358 printk_debug("MC_GBASE_ADD = 0x%08x\n", *mcgbaseadd);
360 printk_debug("I would set ram size to %d Mbytes\n", (tomk >> 10));
362 /* Compute the top of Low memory */
363 tolmk = pci_tolm >> 10;
365 /* The PCI hole does does not overlap the memory.
369 /* Report the memory regions */
371 ram_resource(dev, idx++, 0, tolmk);
373 assign_resources(&dev->link[0]);
377 static unsigned int pci_domain_scan_bus(device_t dev, unsigned int max)
379 max = pci_scan_bus(&dev->link[0], PCI_DEVFN(0, 0), 0xff, max);
383 static struct device_operations pci_domain_ops = {
384 .read_resources = pci_domain_read_resources,
385 .set_resources = pci_domain_set_resources,
386 .enable_resources = enable_childrens_resources,
388 .scan_bus = pci_domain_scan_bus,
391 static void cpu_bus_init(device_t dev)
393 initialize_cpus(&dev->link[0]);
396 static void cpu_bus_noop(device_t dev)
400 static struct device_operations cpu_bus_ops = {
401 .read_resources = cpu_bus_noop,
402 .set_resources = cpu_bus_noop,
403 .enable_resources = cpu_bus_noop,
404 .init = cpu_bus_init,
408 void chipsetInit (void);
410 static void enable_dev(struct device *dev)
412 printk_debug("gx2 north: enable_dev\n");
413 /* Set the operations if it is a special bus type */
414 if (dev->path.type == DEVICE_PATH_PCI_DOMAIN) {
415 extern void cpubug(void);
416 printk_debug("DEVICE_PATH_PCI_DOMAIN\n");
417 /* cpubug MUST be called before setup_gx2(), so we force the issue here */
422 /* do this here for now -- this chip really breaks our device model */
423 setup_realmode_idt();
425 dev->ops = &pci_domain_ops;
427 ram_resource(dev, 0, 0, (sizeram() - RAMADJUSTMB)*1024);
428 } else if (dev->path.type == DEVICE_PATH_APIC_CLUSTER) {
429 printk_debug("DEVICE_PATH_APIC_CLUSTER\n");
430 dev->ops = &cpu_bus_ops;
434 struct chip_operations northbridge_amd_gx2_ops = {
435 CHIP_NAME("AMD GX2 Northbridge")
436 .enable_dev = enable_dev,