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>
18 extern void graphics_init(void);
20 #define NORTHBRIDGE_FILE "northbridge.c"
22 /* todo: add a resource record. We don't do this here because this may be called when
23 * very little of the platform is actually working.
32 msr = rdmsr(0x20000018);
33 printk_debug("sizeram: %08x:%08x\n", msr.hi, msr.lo);
39 sizem = (1 << ((dimm >> 12)-1)) * 8;
46 sizem += (1 << ((dimm >> 12)-1)) * 8;
48 printk_debug("sizeram: sizem 0x%x\n", sizem);
53 /* here is programming for the various MSRs.*/
54 #define IM_QWAIT 0x100000
56 #define DMCF_WRITE_SERIALIZE_REQUEST (2<<12) /* 2 outstanding */ /* in high */
57 #define DMCF_SERIAL_LOAD_MISSES (2) /* enabled */
59 /* these are the 8-bit attributes for controlling RCONF registers */
60 #define CACHE_DISABLE (1<<0)
61 #define WRITE_ALLOCATE (1<<1)
62 #define WRITE_PROTECT (1<<2)
63 #define WRITE_THROUGH (1<<3)
64 #define WRITE_COMBINE (1<<4)
65 #define WRITE_SERIALIZE (1<<5)
67 /* ram has none of this stuff */
68 #define RAM_PROPERTIES (0)
69 #define DEVICE_PROPERTIES (WRITE_SERIALIZE|CACHE_DISABLE)
70 #define ROM_PROPERTIES (WRITE_SERIALIZE|WRITE_PROTECT|CACHE_DISABLE)
71 #define MSR_WS_CD_DEFAULT (0x21212121)
73 /* 1810-1817 give you 8 registers with which to program protection regions */
74 /* the are region configuration range registers, or RRCF */
75 /* in msr terms, the are a straight base, top address assign, since they are 4k aligned. */
76 /* so no left-shift needed for top or base */
77 #define RRCF_LOW(base,properties) (base|(1<<8)|properties)
78 #define RRCF_LOW_CD(base) RRCF_LOW(base, CACHE_DISABLE)
80 /* build initializer for P2D MSR */
81 #define P2D_BM(msr, pdid1, bizarro, pbase, pmask) {msr, {.hi=(pdid1<<29)|(bizarro<<28)|(pbase>>24), .lo=(pbase<<8)|pmask}}
82 #define P2D_BMO(msr, pdid1, bizarro, poffset, pbase, pmask) {msr, {.hi=(pdid1<<29)|(bizarro<<28)|(poffset<<8)|(pbase>>24), .lo=(pbase<<8)|pmask}}
83 #define P2D_R(msr, pdid1, bizarro, pmax, pmin) {msr, {.hi=(pdid1<<29)|(bizarro<<28)|(pmax>>12), .lo=(pmax<<20)|pmin}}
84 #define P2D_RO(msr, pdid1, bizarro, poffset, pmax, pmin) {msr, {.hi=(pdid1<<29)|(bizarro<<28)|(poffset<<8)|(pmax>>12), .lo=(pmax<<20)|pmin}}
85 #define P2D_SC(msr, pdid1, bizarro, wen, ren,pscbase) {msr, {.hi=(pdid1<<29)|(bizarro<<28)|(wen), .lo=(ren<<16)|(pscbase>>18)}}
86 #define IOD_BM(msr, pdid1, bizarro, ibase, imask) {msr, {.hi=(pdid1<<29)|(bizarro<<28)|(ibase>>12), .lo=(ibase<<20)|imask}}
87 #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)}}
95 {0x1700, {.hi = 0, .lo = IM_QWAIT}},
96 {0x1800, {.hi = DMCF_WRITE_SERIALIZE_REQUEST, .lo = DMCF_SERIAL_LOAD_MISSES}},
97 /* 1808 will be done down below, so we have to do 180a->1817 (well, 1813 really) */
98 /* for 180a, for now, we assume VSM will configure it */
99 /* 180b is left at reset value,a0000-bffff is non-cacheable */
100 /* 180c, c0000-dffff is set to write serialize and non-cachable */
101 /* oops, 180c will be set by cpu bug handling in cpubug.c */
102 //{0x180c, {.hi = MSR_WS_CD_DEFAULT, .lo = MSR_WS_CD_DEFAULT}},
103 /* 180d is left at default, e0000-fffff is non-cached */
105 /* we will assume 180e, the ssm region configuration, is left at default or set by VSM */
106 /* we will not set 0x180f, the DMM,yet */
107 //{0x1810, {.hi=0xee7ff000, .lo=RRCF_LOW(0xee000000, WRITE_COMBINE|CACHE_DISABLE)}},
108 //{0x1811, {.hi = 0xefffb000, .lo = RRCF_LOW_CD(0xefff8000)}},
109 //{0x1812, {.hi = 0xefff7000, .lo = RRCF_LOW_CD(0xefff4000)}},
110 //{0x1813, {.hi = 0xefff3000, .lo = RRCF_LOW_CD(0xefff0000)}},
111 /* now for GLPCI routing */
113 P2D_BM(0x10000020, 0x1, 0x0, 0x0, 0xfff80),
114 P2D_BM(0x10000021, 0x1, 0x0, 0x80000, 0xfffe0),
115 P2D_SC(0x1000002c, 0x1, 0x0, 0x0, 0xff03, 0xC0000),
117 P2D_BM(0x40000020, 0x1, 0x0, 0x0, 0xfff80),
118 P2D_BM(0x40000021, 0x1, 0x0, 0x80000, 0xfffe0),
119 P2D_SC(0x4000002d, 0x1, 0x0, 0x0, 0xff03, 0xC0000),
123 /* note that dev is NOT used -- yet */
124 static void irq_init_steering(struct device *dev, uint16_t irq_map) {
125 /* Set up IRQ steering */
126 uint32_t pciAddr = 0x80000000 | (CHIPSET_DEV_NUM << 11) | 0x5C;
128 printk_debug("%s(%08X [%08X], %04X)\n", __FUNCTION__, dev, pciAddr, irq_map);
130 /* The IRQ steering values (in hex) are effectively dcba, where:
131 * <a> represents the IRQ for INTA,
132 * <b> represents the IRQ for INTB,
133 * <c> represents the IRQ for INTC, and
134 * <d> represents the IRQ for INTD.
135 * Thus, a value of irq_map = 0xAA5B translates to:
136 * INTA = IRQB (IRQ 11)
137 * INTB = IRQ5 (IRQ 5)
138 * INTC = IRQA (IRQ 10)
139 * INTD = IRQA (IRQ 10)
141 outl(pciAddr & ~3, 0xCF8);
142 outl(irq_map, 0xCFC);
149 * Returns the amount of memory (in KB) available to the system. This is the
150 * total amount of memory less the amount of memory reserved for SMM use.
154 setup_gx2_cache(void)
157 unsigned long long val;
158 int sizekbytes, sizereg;
160 sizekbytes = sizeram() * 1024;
161 printk_debug("setup_gx2_cache: enable for %d KB\n", sizekbytes);
162 /* build up the rconf word. */
163 /* the SYSTOP bits 27:8 are actually the top bits from 31:12. Book fails to say that */
165 val = ((unsigned long long) ROM_PROPERTIES) << 56;
166 /* make rom base useful for 1M roms */
167 /* Flash base address -- sized for 1M for now*/
168 val |= ((unsigned long long) 0xfff00)<<36;
169 /* set the devrp properties */
170 val |= ((unsigned long long) DEVICE_PROPERTIES) << 28;
171 /* Take our TOM, RIGHT shift 12, since it page-aligned, then LEFT-shift 8 for reg. */
172 /* yank off memory for the SMM handler */
173 sizekbytes -= SMM_SIZE;
174 sizereg = sizekbytes;
175 sizereg *= 1024; // convert to bytes
179 val |= RAM_PROPERTIES;
181 msr.hi = (val >> 32);
182 printk_debug("msr 0x%08X will be set to %08x:%08x\n", CPU_RCONF_DEFAULT, msr.hi, msr.lo);
183 wrmsr(CPU_RCONF_DEFAULT, msr);
190 /* we have to do this here. We have not found a nicer way to do it */
195 unsigned long tmp, tmp2;
197 unsigned long size_kb, membytes;
199 size_kb = setup_gx2_cache();
201 membytes = size_kb * 1024;
202 /* NOTE! setup_gx2_cache returns the SIZE OF RAM - RAMADJUST!
203 * so it is safe to use. You should NOT at this point call
204 * sizeram() directly.
207 /* we need to set 0x10000028 and 0x40000029 */
209 * These two descriptors cover the range from 1 MB (0x100000) to
210 * SYSTOP (a.k.a. TOM, or Top of Memory)
214 /* This has already been done elsewhere */
215 printk_debug("size_kb 0x%x, membytes 0x%x\n", size_kb, membytes);
216 msr.hi = 0x20000000 | membytes>>24;
217 msr.lo = 0x100 | ( ((membytes >>12) & 0xfff) << 20);
218 wrmsr(0x10000028, msr);
219 msr.hi = 0x20000000 | membytes>>24;
220 msr.lo = 0x100 | ( ((membytes >>12) & 0xfff) << 20);
221 wrmsr(0x40000029, msr);
224 msr = rdmsr(0x10000028);
225 printk_debug("MSR 0x%x is now 0x%x:0x%x\n", 0x10000028, msr.hi,msr.lo);
226 msr = rdmsr(0x40000029);
227 printk_debug("MSR 0x%x is now 0x%x:0x%x\n", 0x40000029, msr.hi,msr.lo);
230 /* fixme: SMM MSR 0x10000026 and 0x400000023 */
231 /* calculate the OFFSET field */
232 tmp = membytes - SMM_OFFSET;
236 tmp |= (SMM_OFFSET >> 24);
238 /* calculate the PBASE and PMASK fields */
239 tmp2 = (SMM_OFFSET << 8) & 0xFFF00000; /* shift right 12 then left 20 == left 8 */
240 tmp2 |= (((~(SMM_SIZE * 1024) + 1) >> 12) & 0xfffff);
241 printk_debug("MSR 0x%x is now 0x%x:0x%x\n", 0x10000026, tmp, tmp2);
244 wrmsr(0x10000026, msr);
250 wrmsr(0x10000026, msr);
251 msr = rdmsr(0x10000026);
252 printk_debug("MSR 0x%x is now 0x%x:0x%x\n", 0x10000026, msr.hi, msr.lo);
259 printk_debug("MSR 0x%x is now 0x%x:0x%x\n", 0x1808, msr.hi, msr.lo);
261 #if 0 // SDG - don't do this
262 /* now do the default MSR values */
263 for(i = 0; msr_defaults[i].msr_no; i++) {
265 wrmsr(msr_defaults[i].msr_no, msr_defaults[i].msr); // MSR - see table above
266 msr = rdmsr(msr_defaults[i].msr_no);
267 printk_debug("MSR 0x%08X is now 0x%08X:0x%08X\n", msr_defaults[i].msr_no, msr.hi,msr.lo);
272 static void enable_shadow(device_t dev)
277 static void northbridge_init(device_t dev)
279 struct northbridge_amd_gx2_config *nb = (struct northbridge_amd_gx2_config *)dev->chip_info;
280 printk_debug("northbridge: %s()\n", __FUNCTION__);
283 irq_init_steering(dev, nb->irqmap);
286 static struct device_operations northbridge_operations = {
287 .read_resources = pci_dev_read_resources,
288 .set_resources = pci_dev_set_resources,
289 .enable_resources = pci_dev_enable_resources,
290 .init = northbridge_init,
295 static struct pci_driver northbridge_driver __pci_driver = {
296 .ops = &northbridge_operations,
297 .vendor = PCI_VENDOR_ID_NS,
298 .device = PCI_DEVICE_ID_NS_GX2,
301 #define BRIDGE_IO_MASK (IORESOURCE_IO | IORESOURCE_MEM)
303 static void pci_domain_read_resources(device_t dev)
305 struct resource *resource;
307 printk_spew("%s:%s()\n", NORTHBRIDGE_FILE, __FUNCTION__);
309 /* Initialize the system wide io space constraints */
310 resource = new_resource(dev, IOINDEX_SUBTRACTIVE(0,0));
311 resource->limit = 0xffffUL;
312 resource->flags = IORESOURCE_IO | IORESOURCE_SUBTRACTIVE | IORESOURCE_ASSIGNED;
314 /* Initialize the system wide memory resources constraints */
315 resource = new_resource(dev, IOINDEX_SUBTRACTIVE(1,0));
316 resource->limit = 0xffffffffULL;
317 resource->flags = IORESOURCE_MEM | IORESOURCE_SUBTRACTIVE | IORESOURCE_ASSIGNED;
320 static void ram_resource(device_t dev, unsigned long index,
321 unsigned long basek, unsigned long sizek)
323 struct resource *resource;
328 resource = new_resource(dev, index);
329 resource->base = ((resource_t)basek) << 10;
330 resource->size = ((resource_t)sizek) << 10;
331 resource->flags = IORESOURCE_MEM | IORESOURCE_CACHEABLE | \
332 IORESOURCE_FIXED | IORESOURCE_STORED | IORESOURCE_ASSIGNED;
335 static void tolm_test(void *gp, struct device *dev, struct resource *new)
337 struct resource **best_p = gp;
338 struct resource *best;
340 if (!best || (best->base > new->base)) {
347 static uint32_t find_pci_tolm(struct bus *bus)
349 struct resource *min;
352 search_bus_resources(bus, IORESOURCE_MEM, IORESOURCE_MEM, tolm_test, &min);
354 if (min && tolm > min->base) {
360 #define FRAMEBUFFERK 4096
362 static void pci_domain_set_resources(device_t dev)
368 pci_tolm = find_pci_tolm(&dev->link[0]);
369 mc_dev = dev->link[0].children;
371 unsigned int tomk, tolmk;
372 unsigned int ramreg = 0;
374 unsigned int *bcdramtop = (unsigned int *)(GX_BASE + BC_DRAM_TOP);
375 unsigned int *mcgbaseadd = (unsigned int *)(GX_BASE + MC_GBASE_ADD);
377 for(i=0; i<0x20; i+= 0x10) {
378 unsigned int *mcreg = (unsigned int *)(GX_BASE + MC_BANK_CFG);
379 unsigned int mem_config = *mcreg;
381 if (((mem_config & (DIMM_PG_SZ << i)) >> (4 + i)) == 7)
383 ramreg += 1 << (((mem_config & (DIMM_SZ << i)) >> (i + 8)) + 2);
388 /* Sort out the framebuffer size */
389 tomk -= FRAMEBUFFERK;
390 *bcdramtop = ((tomk << 10) - 1);
391 *mcgbaseadd = (tomk >> 9);
393 printk_debug("BC_DRAM_TOP = 0x%08x\n", *bcdramtop);
394 printk_debug("MC_GBASE_ADD = 0x%08x\n", *mcgbaseadd);
396 printk_debug("I would set ram size to %d Mbytes\n", (tomk >> 10));
398 /* Compute the top of Low memory */
399 tolmk = pci_tolm >> 10;
401 /* The PCI hole does does not overlap the memory.
405 /* Report the memory regions */
407 ram_resource(dev, idx++, 0, tolmk);
410 assign_resources(&dev->link[0]);
413 static unsigned int pci_domain_scan_bus(device_t dev, unsigned int max)
415 max = pci_scan_bus(&dev->link[0], PCI_DEVFN(0, 0), 0xff, max);
419 static struct device_operations pci_domain_ops = {
420 .read_resources = pci_domain_read_resources,
421 .set_resources = pci_domain_set_resources,
422 .enable_resources = enable_childrens_resources,
424 .scan_bus = pci_domain_scan_bus,
427 static void cpu_bus_init(device_t dev)
429 initialize_cpus(&dev->link[0]);
432 static void cpu_bus_noop(device_t dev)
436 static struct device_operations cpu_bus_ops = {
437 .read_resources = cpu_bus_noop,
438 .set_resources = cpu_bus_noop,
439 .enable_resources = cpu_bus_noop,
440 .init = cpu_bus_init,
444 void chipsetInit (void);
446 static void enable_dev(struct device *dev)
448 printk_debug("gx2 north: enable_dev\n");
449 void northbridgeinit(void);
450 void chipsetinit(struct northbridge_amd_gx2_config *nb);
451 void setup_realmode_idt(void);
452 void do_vsmbios(void);
453 /* Set the operations if it is a special bus type */
454 if (dev->path.type == DEVICE_PATH_PCI_DOMAIN) {
455 struct northbridge_amd_gx2_config *nb = (struct northbridge_amd_gx2_config *)dev->chip_info;
456 extern void cpubug(void);
457 printk_debug("DEVICE_PATH_PCI_DOMAIN\n");
458 /* cpubug MUST be called before setup_gx2(), so we force the issue here */
463 /* do this here for now -- this chip really breaks our device model */
464 setup_realmode_idt();
467 dev->ops = &pci_domain_ops;
469 ram_resource(dev, 0, 0, ((sizeram() - VIDEO_MB) * 1024) - SMM_SIZE);
470 } else if (dev->path.type == DEVICE_PATH_APIC_CLUSTER) {
471 printk_debug("DEVICE_PATH_APIC_CLUSTER\n");
472 dev->ops = &cpu_bus_ops;
474 printk_debug("gx2 north: end enable_dev\n");
477 struct chip_operations northbridge_amd_gx2_ops = {
478 CHIP_NAME("AMD GX2 Northbridge")
479 .enable_dev = enable_dev,