2 * linux/arch/alpha/kernel/core_mcpcia.c
4 * Based on code written by David A Rusling (david.rusling@reo.mts.dec.com).
6 * Code common to all MCbus-PCI Adaptor core logic chipsets
9 #define __EXTERN_INLINE inline
11 #include <asm/core_mcpcia.h>
12 #undef __EXTERN_INLINE
14 #include <linux/types.h>
15 #include <linux/pci.h>
16 #include <linux/sched.h>
17 #include <linux/init.h>
18 #include <linux/delay.h>
20 #include <asm/ptrace.h>
26 * NOTE: Herein lie back-to-back mb instructions. They are magic.
27 * One plausible explanation is that the i/o controller does not properly
28 * handle the system transaction. Another involves timing. Ho hum.
32 * BIOS32-style PCI interface:
38 # define DBG_CFG(args) printk args
40 # define DBG_CFG(args)
44 * Given a bus, device, and function number, compute resulting
45 * configuration space address and setup the MCPCIA_HAXR2 register
46 * accordingly. It is therefore not safe to have concurrent
47 * invocations to configuration space access routines, but there
48 * really shouldn't be any need for this.
52 * 3 3|3 3 2 2|2 2 2 2|2 2 2 2|1 1 1 1|1 1 1 1|1 1
53 * 3 2|1 0 9 8|7 6 5 4|3 2 1 0|9 8 7 6|5 4 3 2|1 0 9 8|7 6 5 4|3 2 1 0
54 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
55 * | | |D|D|D|D|D|D|D|D|D|D|D|D|D|D|D|D|D|D|D|D|D|F|F|F|R|R|R|R|R|R|0|0|
56 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
58 * 31:11 Device select bit.
59 * 10:8 Function number
64 * 3 3|3 3 2 2|2 2 2 2|2 2 2 2|1 1 1 1|1 1 1 1|1 1
65 * 3 2|1 0 9 8|7 6 5 4|3 2 1 0|9 8 7 6|5 4 3 2|1 0 9 8|7 6 5 4|3 2 1 0
66 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
67 * | | | | | | | | | | |B|B|B|B|B|B|B|B|D|D|D|D|D|F|F|F|R|R|R|R|R|R|0|1|
68 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
71 * 23:16 bus number (8 bits = 128 possible buses)
72 * 15:11 Device number (5 bits)
73 * 10:8 function number
77 * The function number selects which function of a multi-function device
78 * (e.g., SCSI and Ethernet).
80 * The register selects a DWORD (32 bit) register offset. Hence it
81 * doesn't get shifted by 2 bits as we want to "drop" the bottom two
86 conf_read(unsigned long addr, unsigned char type1,
87 struct pci_controller *hose)
90 unsigned long mid = MCPCIA_HOSE2MID(hose->index);
91 unsigned int stat0, value, cpu;
93 cpu = smp_processor_id();
95 local_irq_save(flags);
97 DBG_CFG(("conf_read(addr=0x%lx, type1=%d, hose=%d)\n",
100 /* Reset status register to avoid losing errors. */
101 stat0 = *(vuip)MCPCIA_CAP_ERR(mid);
102 *(vuip)MCPCIA_CAP_ERR(mid) = stat0;
104 *(vuip)MCPCIA_CAP_ERR(mid);
105 DBG_CFG(("conf_read: MCPCIA_CAP_ERR(%d) was 0x%x\n", mid, stat0));
109 mcheck_expected(cpu) = 1;
110 mcheck_taken(cpu) = 0;
111 mcheck_extra(cpu) = mid;
114 /* Access configuration space. */
115 value = *((vuip)addr);
119 if (mcheck_taken(cpu)) {
120 mcheck_taken(cpu) = 0;
124 mcheck_expected(cpu) = 0;
127 DBG_CFG(("conf_read(): finished\n"));
129 local_irq_restore(flags);
134 conf_write(unsigned long addr, unsigned int value, unsigned char type1,
135 struct pci_controller *hose)
138 unsigned long mid = MCPCIA_HOSE2MID(hose->index);
139 unsigned int stat0, cpu;
141 cpu = smp_processor_id();
143 local_irq_save(flags); /* avoid getting hit by machine check */
145 /* Reset status register to avoid losing errors. */
146 stat0 = *(vuip)MCPCIA_CAP_ERR(mid);
147 *(vuip)MCPCIA_CAP_ERR(mid) = stat0; mb();
148 *(vuip)MCPCIA_CAP_ERR(mid);
149 DBG_CFG(("conf_write: MCPCIA CAP_ERR(%d) was 0x%x\n", mid, stat0));
152 mcheck_expected(cpu) = 1;
153 mcheck_extra(cpu) = mid;
156 /* Access configuration space. */
157 *((vuip)addr) = value;
160 *(vuip)MCPCIA_CAP_ERR(mid); /* read to force the write */
161 mcheck_expected(cpu) = 0;
164 DBG_CFG(("conf_write(): finished\n"));
165 local_irq_restore(flags);
169 mk_conf_addr(struct pci_bus *pbus, unsigned int devfn, int where,
170 struct pci_controller *hose, unsigned long *pci_addr,
171 unsigned char *type1)
173 u8 bus = pbus->number;
176 DBG_CFG(("mk_conf_addr(bus=%d,devfn=0x%x,hose=%d,where=0x%x,"
177 " pci_addr=0x%p, type1=0x%p)\n",
178 bus, devfn, hose->index, where, pci_addr, type1));
180 /* Type 1 configuration cycle for *ALL* busses. */
183 if (!pbus->parent) /* No parent means peer PCI bus. */
185 addr = (bus << 16) | (devfn << 8) | (where);
186 addr <<= 5; /* swizzle for SPARSE */
187 addr |= hose->config_space_base;
190 DBG_CFG(("mk_conf_addr: returning pci_addr 0x%lx\n", addr));
195 mcpcia_read_config(struct pci_bus *bus, unsigned int devfn, int where,
196 int size, u32 *value)
198 struct pci_controller *hose = bus->sysdata;
199 unsigned long addr, w;
202 if (mk_conf_addr(bus, devfn, where, hose, &addr, &type1))
203 return PCIBIOS_DEVICE_NOT_FOUND;
205 addr |= (size - 1) * 8;
206 w = conf_read(addr, type1, hose);
209 *value = __kernel_extbl(w, where & 3);
212 *value = __kernel_extwl(w, where & 3);
218 return PCIBIOS_SUCCESSFUL;
222 mcpcia_write_config(struct pci_bus *bus, unsigned int devfn, int where,
225 struct pci_controller *hose = bus->sysdata;
229 if (mk_conf_addr(bus, devfn, where, hose, &addr, &type1))
230 return PCIBIOS_DEVICE_NOT_FOUND;
232 addr |= (size - 1) * 8;
233 value = __kernel_insql(value, where & 3);
234 conf_write(addr, value, type1, hose);
235 return PCIBIOS_SUCCESSFUL;
238 struct pci_ops mcpcia_pci_ops =
240 .read = mcpcia_read_config,
241 .write = mcpcia_write_config,
245 mcpcia_pci_tbi(struct pci_controller *hose, dma_addr_t start, dma_addr_t end)
248 *(vuip)MCPCIA_SG_TBIA(MCPCIA_HOSE2MID(hose->index)) = 0;
253 mcpcia_probe_hose(int h)
255 int cpu = smp_processor_id();
256 int mid = MCPCIA_HOSE2MID(h);
257 unsigned int pci_rev;
259 /* Gotta be REAL careful. If hose is absent, we get an mcheck. */
266 mcheck_expected(cpu) = 2; /* indicates probing */
267 mcheck_taken(cpu) = 0;
268 mcheck_extra(cpu) = mid;
271 /* Access the bus revision word. */
272 pci_rev = *(vuip)MCPCIA_REV(mid);
276 if (mcheck_taken(cpu)) {
277 mcheck_taken(cpu) = 0;
278 pci_rev = 0xffffffff;
281 mcheck_expected(cpu) = 0;
284 return (pci_rev >> 16) == PCI_CLASS_BRIDGE_HOST;
288 mcpcia_new_hose(int h)
290 struct pci_controller *hose;
291 struct resource *io, *mem, *hae_mem;
292 int mid = MCPCIA_HOSE2MID(h);
294 hose = alloc_pci_controller();
297 io = alloc_resource();
298 mem = alloc_resource();
299 hae_mem = alloc_resource();
302 hose->mem_space = hae_mem;
303 hose->sparse_mem_base = MCPCIA_SPARSE(mid) - IDENT_ADDR;
304 hose->dense_mem_base = MCPCIA_DENSE(mid) - IDENT_ADDR;
305 hose->sparse_io_base = MCPCIA_IO(mid) - IDENT_ADDR;
306 hose->dense_io_base = 0;
307 hose->config_space_base = MCPCIA_CONF(mid);
310 io->start = MCPCIA_IO(mid) - MCPCIA_IO_BIAS;
311 io->end = io->start + 0xffff;
312 io->name = pci_io_names[h];
313 io->flags = IORESOURCE_IO;
315 mem->start = MCPCIA_DENSE(mid) - MCPCIA_MEM_BIAS;
316 mem->end = mem->start + 0xffffffff;
317 mem->name = pci_mem_names[h];
318 mem->flags = IORESOURCE_MEM;
320 hae_mem->start = mem->start;
321 hae_mem->end = mem->start + MCPCIA_MEM_MASK;
322 hae_mem->name = pci_hae0_name;
323 hae_mem->flags = IORESOURCE_MEM;
325 if (request_resource(&ioport_resource, io) < 0)
326 printk(KERN_ERR "Failed to request IO on hose %d\n", h);
327 if (request_resource(&iomem_resource, mem) < 0)
328 printk(KERN_ERR "Failed to request MEM on hose %d\n", h);
329 if (request_resource(mem, hae_mem) < 0)
330 printk(KERN_ERR "Failed to request HAE_MEM on hose %d\n", h);
334 mcpcia_pci_clr_err(int mid)
336 *(vuip)MCPCIA_CAP_ERR(mid);
337 *(vuip)MCPCIA_CAP_ERR(mid) = 0xffffffff; /* Clear them all. */
339 *(vuip)MCPCIA_CAP_ERR(mid); /* Re-read for force write. */
343 mcpcia_startup_hose(struct pci_controller *hose)
345 int mid = MCPCIA_HOSE2MID(hose->index);
348 mcpcia_pci_clr_err(mid);
351 * Set up error reporting.
353 tmp = *(vuip)MCPCIA_CAP_ERR(mid);
354 tmp |= 0x0006; /* master/target abort */
355 *(vuip)MCPCIA_CAP_ERR(mid) = tmp;
357 tmp = *(vuip)MCPCIA_CAP_ERR(mid);
360 * Set up the PCI->physical memory translation windows.
362 * Window 0 is scatter-gather 8MB at 8MB (for isa)
363 * Window 1 is scatter-gather (up to) 1GB at 1GB (for pci)
364 * Window 2 is direct access 2GB at 2GB
366 hose->sg_isa = iommu_arena_new(hose, 0x00800000, 0x00800000, 0);
367 hose->sg_pci = iommu_arena_new(hose, 0x40000000,
368 size_for_memory(0x40000000), 0);
370 __direct_map_base = 0x80000000;
371 __direct_map_size = 0x80000000;
373 *(vuip)MCPCIA_W0_BASE(mid) = hose->sg_isa->dma_base | 3;
374 *(vuip)MCPCIA_W0_MASK(mid) = (hose->sg_isa->size - 1) & 0xfff00000;
375 *(vuip)MCPCIA_T0_BASE(mid) = virt_to_phys(hose->sg_isa->ptes) >> 8;
377 *(vuip)MCPCIA_W1_BASE(mid) = hose->sg_pci->dma_base | 3;
378 *(vuip)MCPCIA_W1_MASK(mid) = (hose->sg_pci->size - 1) & 0xfff00000;
379 *(vuip)MCPCIA_T1_BASE(mid) = virt_to_phys(hose->sg_pci->ptes) >> 8;
381 *(vuip)MCPCIA_W2_BASE(mid) = __direct_map_base | 1;
382 *(vuip)MCPCIA_W2_MASK(mid) = (__direct_map_size - 1) & 0xfff00000;
383 *(vuip)MCPCIA_T2_BASE(mid) = 0;
385 *(vuip)MCPCIA_W3_BASE(mid) = 0x0;
387 mcpcia_pci_tbi(hose, 0, -1);
389 *(vuip)MCPCIA_HBASE(mid) = 0x0;
392 *(vuip)MCPCIA_HAE_MEM(mid) = 0U;
394 *(vuip)MCPCIA_HAE_MEM(mid); /* read it back. */
395 *(vuip)MCPCIA_HAE_IO(mid) = 0;
397 *(vuip)MCPCIA_HAE_IO(mid); /* read it back. */
401 mcpcia_init_arch(void)
403 /* With multiple PCI busses, we play with I/O as physical addrs. */
404 ioport_resource.end = ~0UL;
406 /* Allocate hose 0. That's the one that all the ISA junk hangs
407 off of, from which we'll be registering stuff here in a bit.
408 Other hose detection is done in mcpcia_init_hoses, which is
409 called from init_IRQ. */
414 /* This is called from init_IRQ, since we cannot take interrupts
415 before then. Which means we cannot do this in init_arch. */
418 mcpcia_init_hoses(void)
420 struct pci_controller *hose;
424 /* First, find how many hoses we have. */
426 for (h = 0; h < MCPCIA_MAX_HOSES; ++h) {
427 if (mcpcia_probe_hose(h)) {
434 printk("mcpcia_init_hoses: found %d hoses\n", hose_count);
436 /* Now do init for each hose. */
437 for (hose = hose_head; hose; hose = hose->next)
438 mcpcia_startup_hose(hose);
442 mcpcia_print_uncorrectable(struct el_MCPCIA_uncorrected_frame_mcheck *logout)
444 struct el_common_EV5_uncorrectable_mcheck *frame;
447 frame = &logout->procdata;
449 /* Print PAL fields */
450 for (i = 0; i < 24; i += 2) {
451 printk(" paltmp[%d-%d] = %16lx %16lx\n",
452 i, i+1, frame->paltemp[i], frame->paltemp[i+1]);
454 for (i = 0; i < 8; i += 2) {
455 printk(" shadow[%d-%d] = %16lx %16lx\n",
456 i, i+1, frame->shadow[i],
459 printk(" Addr of excepting instruction = %16lx\n",
461 printk(" Summary of arithmetic traps = %16lx\n",
463 printk(" Exception mask = %16lx\n",
465 printk(" Base address for PALcode = %16lx\n",
467 printk(" Interrupt Status Reg = %16lx\n",
469 printk(" CURRENT SETUP OF EV5 IBOX = %16lx\n",
471 printk(" I-CACHE Reg %s parity error = %16lx\n",
472 (frame->ic_perr_stat & 0x800L) ?
474 frame->ic_perr_stat);
475 printk(" D-CACHE error Reg = %16lx\n",
476 frame->dc_perr_stat);
477 if (frame->dc_perr_stat & 0x2) {
478 switch (frame->dc_perr_stat & 0x03c) {
480 printk(" Data error in bank 1\n");
483 printk(" Data error in bank 0\n");
486 printk(" Tag error in bank 1\n");
489 printk(" Tag error in bank 0\n");
493 printk(" Effective VA = %16lx\n",
495 printk(" Reason for D-stream = %16lx\n",
497 printk(" EV5 SCache address = %16lx\n",
499 printk(" EV5 SCache TAG/Data parity = %16lx\n",
501 printk(" EV5 BC_TAG_ADDR = %16lx\n",
503 printk(" EV5 EI_ADDR: Phys addr of Xfer = %16lx\n",
505 printk(" Fill Syndrome = %16lx\n",
506 frame->fill_syndrome);
507 printk(" EI_STAT reg = %16lx\n",
509 printk(" LD_LOCK = %16lx\n",
514 mcpcia_print_system_area(unsigned long la_ptr)
516 struct el_common *frame;
517 struct pci_controller *hose;
519 struct IOD_subpacket {
523 unsigned int pci_rev;
524 unsigned int cap_ctrl;
525 unsigned int hae_mem;
527 unsigned int int_ctl;
528 unsigned int int_reg;
529 unsigned int int_mask0;
530 unsigned int int_mask1;
531 unsigned int mc_err0;
532 unsigned int mc_err1;
533 unsigned int cap_err;
535 unsigned int pci_err1;
536 unsigned int mdpa_stat;
537 unsigned int mdpa_syn;
538 unsigned int mdpb_stat;
539 unsigned int mdpb_syn;
545 frame = (struct el_common *)la_ptr;
546 iodpp = (struct IOD_subpacket *) (la_ptr + frame->sys_offset);
548 for (hose = hose_head; hose; hose = hose->next, iodpp++) {
550 printk("IOD %d Register Subpacket - Bridge Base Address %16lx\n",
551 hose->index, iodpp->base);
552 printk(" WHOAMI = %8x\n", iodpp->whoami);
553 printk(" PCI_REV = %8x\n", iodpp->pci_rev);
554 printk(" CAP_CTRL = %8x\n", iodpp->cap_ctrl);
555 printk(" HAE_MEM = %8x\n", iodpp->hae_mem);
556 printk(" HAE_IO = %8x\n", iodpp->hae_io);
557 printk(" INT_CTL = %8x\n", iodpp->int_ctl);
558 printk(" INT_REG = %8x\n", iodpp->int_reg);
559 printk(" INT_MASK0 = %8x\n", iodpp->int_mask0);
560 printk(" INT_MASK1 = %8x\n", iodpp->int_mask1);
561 printk(" MC_ERR0 = %8x\n", iodpp->mc_err0);
562 printk(" MC_ERR1 = %8x\n", iodpp->mc_err1);
563 printk(" CAP_ERR = %8x\n", iodpp->cap_err);
564 printk(" PCI_ERR1 = %8x\n", iodpp->pci_err1);
565 printk(" MDPA_STAT = %8x\n", iodpp->mdpa_stat);
566 printk(" MDPA_SYN = %8x\n", iodpp->mdpa_syn);
567 printk(" MDPB_STAT = %8x\n", iodpp->mdpb_stat);
568 printk(" MDPB_SYN = %8x\n", iodpp->mdpb_syn);
573 mcpcia_machine_check(unsigned long vector, unsigned long la_ptr)
575 struct el_MCPCIA_uncorrected_frame_mcheck *mchk_logout;
576 unsigned int cpu = smp_processor_id();
579 mchk_logout = (struct el_MCPCIA_uncorrected_frame_mcheck *)la_ptr;
580 expected = mcheck_expected(cpu);
589 /* FIXME: how do we figure out which hose the
591 struct pci_controller *hose;
592 for (hose = hose_head; hose; hose = hose->next)
593 mcpcia_pci_clr_err(MCPCIA_HOSE2MID(hose->index));
597 mcpcia_pci_clr_err(mcheck_extra(cpu));
600 /* Otherwise, we're being called from mcpcia_probe_hose
601 and there's no hose clear an error from. */
608 process_mcheck_info(vector, la_ptr, "MCPCIA", expected != 0);
609 if (!expected && vector != 0x620 && vector != 0x630) {
610 mcpcia_print_uncorrectable(mchk_logout);
611 mcpcia_print_system_area(la_ptr);