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>
15 #include <cpu/amd/vr.h>
16 #include "../../../southbridge/amd/cs5536/cs5536.h"
19 extern void graphics_init(void);
21 #define NORTHBRIDGE_FILE "northbridge.c"
23 /* todo: add a resource record. We don't do this here because this may be called when
24 * very little of the platform is actually working.
33 msr = rdmsr(0x20000018);
34 printk_debug("sizeram: %08x:%08x\n", msr.hi, msr.lo);
40 sizem = (1 << ((dimm >> 12)-1)) * 8;
47 sizem += (1 << ((dimm >> 12)-1)) * 8;
49 printk_debug("sizeram: sizem 0x%x\n", sizem);
54 /* here is programming for the various MSRs.*/
55 #define IM_QWAIT 0x100000
57 #define DMCF_WRITE_SERIALIZE_REQUEST (2<<12) /* 2 outstanding */ /* in high */
58 #define DMCF_SERIAL_LOAD_MISSES (2) /* enabled */
60 /* these are the 8-bit attributes for controlling RCONF registers */
61 #define CACHE_DISABLE (1<<0)
62 #define WRITE_ALLOCATE (1<<1)
63 #define WRITE_PROTECT (1<<2)
64 #define WRITE_THROUGH (1<<3)
65 #define WRITE_COMBINE (1<<4)
66 #define WRITE_SERIALIZE (1<<5)
68 /* ram has none of this stuff */
69 #define RAM_PROPERTIES (0)
70 #define DEVICE_PROPERTIES (WRITE_SERIALIZE|CACHE_DISABLE)
71 #define ROM_PROPERTIES (WRITE_SERIALIZE|WRITE_PROTECT|CACHE_DISABLE)
72 #define MSR_WS_CD_DEFAULT (0x21212121)
74 /* 1810-1817 give you 8 registers with which to program protection regions */
75 /* the are region configuration range registers, or RRCF */
76 /* in msr terms, the are a straight base, top address assign, since they are 4k aligned. */
77 /* so no left-shift needed for top or base */
78 #define RRCF_LOW(base,properties) (base|(1<<8)|properties)
79 #define RRCF_LOW_CD(base) RRCF_LOW(base, CACHE_DISABLE)
81 /* build initializer for P2D MSR */
82 #define P2D_BM(msr, pdid1, bizarro, pbase, pmask) {msr, {.hi=(pdid1<<29)|(bizarro<<28)|(pbase>>24), .lo=(pbase<<8)|pmask}}
83 #define P2D_BMO(msr, pdid1, bizarro, poffset, pbase, pmask) {msr, {.hi=(pdid1<<29)|(bizarro<<28)|(poffset<<8)|(pbase>>24), .lo=(pbase<<8)|pmask}}
84 #define P2D_R(msr, pdid1, bizarro, pmax, pmin) {msr, {.hi=(pdid1<<29)|(bizarro<<28)|(pmax>>12), .lo=(pmax<<20)|pmin}}
85 #define P2D_RO(msr, pdid1, bizarro, poffset, pmax, pmin) {msr, {.hi=(pdid1<<29)|(bizarro<<28)|(poffset<<8)|(pmax>>12), .lo=(pmax<<20)|pmin}}
86 #define P2D_SC(msr, pdid1, bizarro, wen, ren,pscbase) {msr, {.hi=(pdid1<<29)|(bizarro<<28)|(wen), .lo=(ren<<16)|(pscbase>>18)}}
87 #define IOD_BM(msr, pdid1, bizarro, ibase, imask) {msr, {.hi=(pdid1<<29)|(bizarro<<28)|(ibase>>12), .lo=(ibase<<20)|imask}}
88 #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)}}
96 {0x1700, {.hi = 0, .lo = IM_QWAIT}},
97 {0x1800, {.hi = DMCF_WRITE_SERIALIZE_REQUEST, .lo = DMCF_SERIAL_LOAD_MISSES}},
98 /* 1808 will be done down below, so we have to do 180a->1817 (well, 1813 really) */
99 /* for 180a, for now, we assume VSM will configure it */
100 /* 180b is left at reset value,a0000-bffff is non-cacheable */
101 /* 180c, c0000-dffff is set to write serialize and non-cachable */
102 /* oops, 180c will be set by cpu bug handling in cpubug.c */
103 //{0x180c, {.hi = MSR_WS_CD_DEFAULT, .lo = MSR_WS_CD_DEFAULT}},
104 /* 180d is left at default, e0000-fffff is non-cached */
106 /* we will assume 180e, the ssm region configuration, is left at default or set by VSM */
107 /* we will not set 0x180f, the DMM,yet */
108 //{0x1810, {.hi=0xee7ff000, .lo=RRCF_LOW(0xee000000, WRITE_COMBINE|CACHE_DISABLE)}},
109 //{0x1811, {.hi = 0xefffb000, .lo = RRCF_LOW_CD(0xefff8000)}},
110 //{0x1812, {.hi = 0xefff7000, .lo = RRCF_LOW_CD(0xefff4000)}},
111 //{0x1813, {.hi = 0xefff3000, .lo = RRCF_LOW_CD(0xefff0000)}},
112 /* now for GLPCI routing */
114 P2D_BM(0x10000020, 0x1, 0x0, 0x0, 0xfff80),
115 P2D_BM(0x10000021, 0x1, 0x0, 0x80000, 0xfffe0),
116 P2D_SC(0x1000002c, 0x1, 0x0, 0x0, 0xff03, 0xC0000),
118 P2D_BM(0x40000020, 0x1, 0x0, 0x0, 0xfff80),
119 P2D_BM(0x40000021, 0x1, 0x0, 0x80000, 0xfffe0),
120 P2D_SC(0x4000002d, 0x1, 0x0, 0x0, 0xff03, 0xC0000),
124 /* note that dev is NOT used -- yet */
125 static void irq_init_steering(struct device *dev, uint16_t irq_map) {
126 /* Set up IRQ steering */
127 uint32_t pciAddr = 0x80000000 | (CHIPSET_DEV_NUM << 11) | 0x5C;
129 printk_debug("%s(%08X [%08X], %04X)\n", __FUNCTION__, dev, pciAddr, irq_map);
131 /* The IRQ steering values (in hex) are effectively dcba, where:
132 * <a> represents the IRQ for INTA,
133 * <b> represents the IRQ for INTB,
134 * <c> represents the IRQ for INTC, and
135 * <d> represents the IRQ for INTD.
136 * Thus, a value of irq_map = 0xAA5B translates to:
137 * INTA = IRQB (IRQ 11)
138 * INTB = IRQ5 (IRQ 5)
139 * INTC = IRQA (IRQ 10)
140 * INTD = IRQA (IRQ 10)
142 outl(pciAddr & ~3, 0xCF8);
143 outl(irq_map, 0xCFC);
150 * Returns the amount of memory (in KB) available to the system. This is the
151 * total amount of memory less the amount of memory reserved for SMM use.
155 setup_gx2_cache(void)
158 unsigned long long val;
159 int sizekbytes, sizereg;
161 sizekbytes = sizeram() * 1024;
162 printk_debug("setup_gx2_cache: enable for %d KB\n", sizekbytes);
163 /* build up the rconf word. */
164 /* the SYSTOP bits 27:8 are actually the top bits from 31:12. Book fails to say that */
166 val = ((unsigned long long) ROM_PROPERTIES) << 56;
167 /* make rom base useful for 1M roms */
168 /* Flash base address -- sized for 1M for now*/
169 val |= ((unsigned long long) 0xfff00)<<36;
170 /* set the devrp properties */
171 val |= ((unsigned long long) DEVICE_PROPERTIES) << 28;
172 /* Take our TOM, RIGHT shift 12, since it page-aligned, then LEFT-shift 8 for reg. */
173 /* yank off memory for the SMM handler */
174 sizekbytes -= SMM_SIZE;
175 sizereg = sizekbytes;
176 sizereg *= 1024; // convert to bytes
180 val |= RAM_PROPERTIES;
182 msr.hi = (val >> 32);
183 printk_debug("msr 0x%08X will be set to %08x:%08x\n", CPU_RCONF_DEFAULT, msr.hi, msr.lo);
184 wrmsr(CPU_RCONF_DEFAULT, msr);
191 /* we have to do this here. We have not found a nicer way to do it */
196 unsigned long tmp, tmp2;
198 unsigned long size_kb, membytes;
200 size_kb = setup_gx2_cache();
202 membytes = size_kb * 1024;
203 /* NOTE! setup_gx2_cache returns the SIZE OF RAM - RAMADJUST!
204 * so it is safe to use. You should NOT at this point call
205 * sizeram() directly.
208 /* we need to set 0x10000028 and 0x40000029 */
210 * These two descriptors cover the range from 1 MB (0x100000) to
211 * SYSTOP (a.k.a. TOM, or Top of Memory)
215 /* This has already been done elsewhere */
216 printk_debug("size_kb 0x%x, membytes 0x%x\n", size_kb, membytes);
217 msr.hi = 0x20000000 | membytes>>24;
218 msr.lo = 0x100 | ( ((membytes >>12) & 0xfff) << 20);
219 wrmsr(0x10000028, msr);
220 msr.hi = 0x20000000 | membytes>>24;
221 msr.lo = 0x100 | ( ((membytes >>12) & 0xfff) << 20);
222 wrmsr(0x40000029, msr);
225 msr = rdmsr(0x10000028);
226 printk_debug("MSR 0x%x is now 0x%x:0x%x\n", 0x10000028, msr.hi,msr.lo);
227 msr = rdmsr(0x40000029);
228 printk_debug("MSR 0x%x is now 0x%x:0x%x\n", 0x40000029, msr.hi,msr.lo);
231 /* fixme: SMM MSR 0x10000026 and 0x400000023 */
232 /* calculate the OFFSET field */
233 tmp = membytes - SMM_OFFSET;
237 tmp |= (SMM_OFFSET >> 24);
239 /* calculate the PBASE and PMASK fields */
240 tmp2 = (SMM_OFFSET << 8) & 0xFFF00000; /* shift right 12 then left 20 == left 8 */
241 tmp2 |= (((~(SMM_SIZE * 1024) + 1) >> 12) & 0xfffff);
242 printk_debug("MSR 0x%x is now 0x%x:0x%x\n", 0x10000026, tmp, tmp2);
245 wrmsr(0x10000026, msr);
251 wrmsr(0x10000026, msr);
252 msr = rdmsr(0x10000026);
253 printk_debug("MSR 0x%x is now 0x%x:0x%x\n", 0x10000026, msr.hi, msr.lo);
260 printk_debug("MSR 0x%x is now 0x%x:0x%x\n", 0x1808, msr.hi, msr.lo);
262 #if 0 // SDG - don't do this
263 /* now do the default MSR values */
264 for(i = 0; msr_defaults[i].msr_no; i++) {
266 wrmsr(msr_defaults[i].msr_no, msr_defaults[i].msr); // MSR - see table above
267 msr = rdmsr(msr_defaults[i].msr_no);
268 printk_debug("MSR 0x%08X is now 0x%08X:0x%08X\n", msr_defaults[i].msr_no, msr.hi,msr.lo);
273 static void enable_shadow(device_t dev)
278 static void northbridge_init(device_t dev)
282 struct northbridge_amd_gx2_config *nb = (struct northbridge_amd_gx2_config *)dev->chip_info;
283 printk_debug("northbridge: %s()\n", __FUNCTION__);
286 irq_init_steering(dev, nb->irqmap);
288 /* HACK HACK HACK HACK */
289 /* 0x1000 is where GPIO is being assigned */
296 /* due to vsa interactions, we need not not touch the nb settings ... */
297 /* this is a test -- we are not sure it will work -- but it ought to */
298 static void set_resources(struct device *dev)
300 struct resource *resource, *last;
305 last = &dev->resource[dev->resources];
307 for(resource = &dev->resource[0]; resource < last; resource++) {
308 pci_set_resource(dev, resource);
311 for(link = 0; link < dev->links; link++) {
313 bus = &dev->link[link];
315 assign_resources(bus);
320 /* set a default latency timer */
321 pci_write_config8(dev, PCI_LATENCY_TIMER, 0x40);
323 /* set a default secondary latency timer */
324 if ((dev->hdr_type & 0x7f) == PCI_HEADER_TYPE_BRIDGE) {
325 pci_write_config8(dev, PCI_SEC_LATENCY_TIMER, 0x40);
328 /* zero the irq settings */
329 line = pci_read_config8(dev, PCI_INTERRUPT_PIN);
331 pci_write_config8(dev, PCI_INTERRUPT_LINE, 0);
333 /* set the cache line size, so far 64 bytes is good for everyone */
334 pci_write_config8(dev, PCI_CACHE_LINE_SIZE, 64 >> 2);
340 static struct device_operations northbridge_operations = {
341 .read_resources = pci_dev_read_resources,
343 .set_resources = pci_dev_set_resources,
345 .set_resources = set_resources,
346 .enable_resources = pci_dev_enable_resources,
347 .init = northbridge_init,
352 static const struct pci_driver northbridge_driver __pci_driver = {
353 .ops = &northbridge_operations,
354 .vendor = PCI_VENDOR_ID_NS,
355 .device = PCI_DEVICE_ID_NS_GX2,
358 #define BRIDGE_IO_MASK (IORESOURCE_IO | IORESOURCE_MEM)
360 static void pci_domain_read_resources(device_t dev)
362 struct resource *resource;
364 printk_spew("%s:%s()\n", NORTHBRIDGE_FILE, __FUNCTION__);
366 /* Initialize the system wide io space constraints */
367 resource = new_resource(dev, IOINDEX_SUBTRACTIVE(0,0));
368 resource->limit = 0xffffUL;
369 resource->flags = IORESOURCE_IO | IORESOURCE_SUBTRACTIVE | IORESOURCE_ASSIGNED;
371 /* Initialize the system wide memory resources constraints */
372 resource = new_resource(dev, IOINDEX_SUBTRACTIVE(1,0));
373 resource->limit = 0xffffffffULL;
374 resource->flags = IORESOURCE_MEM | IORESOURCE_SUBTRACTIVE | IORESOURCE_ASSIGNED;
377 static void ram_resource(device_t dev, unsigned long index,
378 unsigned long basek, unsigned long sizek)
380 struct resource *resource;
385 resource = new_resource(dev, index);
386 resource->base = ((resource_t)basek) << 10;
387 resource->size = ((resource_t)sizek) << 10;
388 resource->flags = IORESOURCE_MEM | IORESOURCE_CACHEABLE | \
389 IORESOURCE_FIXED | IORESOURCE_STORED | IORESOURCE_ASSIGNED;
392 static void tolm_test(void *gp, struct device *dev, struct resource *new)
394 struct resource **best_p = gp;
395 struct resource *best;
397 if (!best || (best->base > new->base)) {
404 static uint32_t find_pci_tolm(struct bus *bus)
406 struct resource *min;
409 search_bus_resources(bus, IORESOURCE_MEM, IORESOURCE_MEM, tolm_test, &min);
411 if (min && tolm > min->base) {
417 #define FRAMEBUFFERK 4096
419 static void pci_domain_set_resources(device_t dev)
425 pci_tolm = find_pci_tolm(&dev->link[0]);
426 mc_dev = dev->link[0].children;
428 unsigned int tomk, tolmk;
429 unsigned int ramreg = 0;
431 unsigned int *bcdramtop = (unsigned int *)(GX_BASE + BC_DRAM_TOP);
432 unsigned int *mcgbaseadd = (unsigned int *)(GX_BASE + MC_GBASE_ADD);
434 for(i=0; i<0x20; i+= 0x10) {
435 unsigned int *mcreg = (unsigned int *)(GX_BASE + MC_BANK_CFG);
436 unsigned int mem_config = *mcreg;
438 if (((mem_config & (DIMM_PG_SZ << i)) >> (4 + i)) == 7)
440 ramreg += 1 << (((mem_config & (DIMM_SZ << i)) >> (i + 8)) + 2);
445 /* Sort out the framebuffer size */
446 tomk -= FRAMEBUFFERK;
447 *bcdramtop = ((tomk << 10) - 1);
448 *mcgbaseadd = (tomk >> 9);
450 printk_debug("BC_DRAM_TOP = 0x%08x\n", *bcdramtop);
451 printk_debug("MC_GBASE_ADD = 0x%08x\n", *mcgbaseadd);
453 printk_debug("I would set ram size to %d Mbytes\n", (tomk >> 10));
455 /* Compute the top of Low memory */
456 tolmk = pci_tolm >> 10;
458 /* The PCI hole does does not overlap the memory.
462 /* Report the memory regions */
464 ram_resource(dev, idx++, 0, tolmk);
467 assign_resources(&dev->link[0]);
470 static unsigned int pci_domain_scan_bus(device_t dev, unsigned int max)
472 max = pci_scan_bus(&dev->link[0], PCI_DEVFN(0, 0), 0xff, max);
476 static struct device_operations pci_domain_ops = {
477 .read_resources = pci_domain_read_resources,
478 .set_resources = pci_domain_set_resources,
479 .enable_resources = enable_childrens_resources,
481 .scan_bus = pci_domain_scan_bus,
484 static void cpu_bus_init(device_t dev)
486 initialize_cpus(&dev->link[0]);
489 static void cpu_bus_noop(device_t dev)
493 static struct device_operations cpu_bus_ops = {
494 .read_resources = cpu_bus_noop,
495 .set_resources = cpu_bus_noop,
496 .enable_resources = cpu_bus_noop,
497 .init = cpu_bus_init,
501 void chipsetInit (void);
503 static void enable_dev(struct device *dev)
505 printk_debug("gx2 north: enable_dev\n");
506 void northbridgeinit(void);
507 void chipsetinit(struct northbridge_amd_gx2_config *nb);
508 void setup_realmode_idt(void);
509 void do_vsmbios(void);
510 /* Set the operations if it is a special bus type */
511 if (dev->path.type == DEVICE_PATH_PCI_DOMAIN) {
512 struct northbridge_amd_gx2_config *nb = (struct northbridge_amd_gx2_config *)dev->chip_info;
513 extern void cpubug(void);
514 printk_debug("DEVICE_PATH_PCI_DOMAIN\n");
515 /* cpubug MUST be called before setup_gx2(), so we force the issue here */
520 /* do this here for now -- this chip really breaks our device model */
521 setup_realmode_idt();
524 dev->ops = &pci_domain_ops;
526 ram_resource(dev, 0, 0, ((sizeram() - VIDEO_MB) * 1024) - SMM_SIZE);
527 } else if (dev->path.type == DEVICE_PATH_APIC_CLUSTER) {
528 printk_debug("DEVICE_PATH_APIC_CLUSTER\n");
529 dev->ops = &cpu_bus_ops;
531 printk_debug("gx2 north: end enable_dev\n");
534 struct chip_operations northbridge_amd_gx2_ops = {
535 CHIP_NAME("AMD GX (previously GX2) Northbridge")
536 .enable_dev = enable_dev,