1 // SPDX-License-Identifier: GPL-2.0
3 * linux/arch/alpha/kernel/core_mcpcia.c
7 * Code common to all MCbus-PCI Adaptor core logic chipsets
10 #define __EXTERN_INLINE inline
12 #include <asm/core_mcpcia.h>
13 #undef __EXTERN_INLINE
15 #include <linux/types.h>
16 #include <linux/pci.h>
17 #include <linux/sched.h>
18 #include <linux/init.h>
19 #include <linux/delay.h>
21 #include <asm/ptrace.h>
27 * NOTE: Herein lie back-to-back mb instructions. They are magic.
28 * One plausible explanation is that the i/o controller does not properly
29 * handle the system transaction. Another involves timing. Ho hum.
33 * BIOS32-style PCI interface:
39 # define DBG_CFG(args) printk args
41 # define DBG_CFG(args)
45 * Given a bus, device, and function number, compute resulting
46 * configuration space address and setup the MCPCIA_HAXR2 register
47 * accordingly. It is therefore not safe to have concurrent
48 * invocations to configuration space access routines, but there
49 * really shouldn't be any need for this.
53 * 3 3|3 3 2 2|2 2 2 2|2 2 2 2|1 1 1 1|1 1 1 1|1 1
54 * 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
55 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
56 * | | |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|
57 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
59 * 31:11 Device select bit.
60 * 10:8 Function number
65 * 3 3|3 3 2 2|2 2 2 2|2 2 2 2|1 1 1 1|1 1 1 1|1 1
66 * 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
67 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
68 * | | | | | | | | | | |B|B|B|B|B|B|B|B|D|D|D|D|D|F|F|F|R|R|R|R|R|R|0|1|
69 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
72 * 23:16 bus number (8 bits = 128 possible buses)
73 * 15:11 Device number (5 bits)
74 * 10:8 function number
78 * The function number selects which function of a multi-function device
79 * (e.g., SCSI and Ethernet).
81 * The register selects a DWORD (32 bit) register offset. Hence it
82 * doesn't get shifted by 2 bits as we want to "drop" the bottom two
87 conf_read(unsigned long addr, unsigned char type1,
88 struct pci_controller *hose)
91 unsigned long mid = MCPCIA_HOSE2MID(hose->index);
92 unsigned int stat0, value, cpu;
94 cpu = smp_processor_id();
96 local_irq_save(flags);
98 DBG_CFG(("conf_read(addr=0x%lx, type1=%d, hose=%d)\n",
101 /* Reset status register to avoid losing errors. */
102 stat0 = *(vuip)MCPCIA_CAP_ERR(mid);
103 *(vuip)MCPCIA_CAP_ERR(mid) = stat0;
105 *(vuip)MCPCIA_CAP_ERR(mid);
106 DBG_CFG(("conf_read: MCPCIA_CAP_ERR(%d) was 0x%x\n", mid, stat0));
110 mcheck_expected(cpu) = 1;
111 mcheck_taken(cpu) = 0;
112 mcheck_extra(cpu) = mid;
115 /* Access configuration space. */
116 value = *((vuip)addr);
120 if (mcheck_taken(cpu)) {
121 mcheck_taken(cpu) = 0;
125 mcheck_expected(cpu) = 0;
128 DBG_CFG(("conf_read(): finished\n"));
130 local_irq_restore(flags);
135 conf_write(unsigned long addr, unsigned int value, unsigned char type1,
136 struct pci_controller *hose)
139 unsigned long mid = MCPCIA_HOSE2MID(hose->index);
140 unsigned int stat0, cpu;
142 cpu = smp_processor_id();
144 local_irq_save(flags); /* avoid getting hit by machine check */
146 /* Reset status register to avoid losing errors. */
147 stat0 = *(vuip)MCPCIA_CAP_ERR(mid);
148 *(vuip)MCPCIA_CAP_ERR(mid) = stat0; mb();
149 *(vuip)MCPCIA_CAP_ERR(mid);
150 DBG_CFG(("conf_write: MCPCIA CAP_ERR(%d) was 0x%x\n", mid, stat0));
153 mcheck_expected(cpu) = 1;
154 mcheck_extra(cpu) = mid;
157 /* Access configuration space. */
158 *((vuip)addr) = value;
161 *(vuip)MCPCIA_CAP_ERR(mid); /* read to force the write */
162 mcheck_expected(cpu) = 0;
165 DBG_CFG(("conf_write(): finished\n"));
166 local_irq_restore(flags);
170 mk_conf_addr(struct pci_bus *pbus, unsigned int devfn, int where,
171 struct pci_controller *hose, unsigned long *pci_addr,
172 unsigned char *type1)
174 u8 bus = pbus->number;
177 DBG_CFG(("mk_conf_addr(bus=%d,devfn=0x%x,hose=%d,where=0x%x,"
178 " pci_addr=0x%p, type1=0x%p)\n",
179 bus, devfn, hose->index, where, pci_addr, type1));
181 /* Type 1 configuration cycle for *ALL* busses. */
184 if (!pbus->parent) /* No parent means peer PCI bus. */
186 addr = (bus << 16) | (devfn << 8) | (where);
187 addr <<= 5; /* swizzle for SPARSE */
188 addr |= hose->config_space_base;
191 DBG_CFG(("mk_conf_addr: returning pci_addr 0x%lx\n", addr));
196 mcpcia_read_config(struct pci_bus *bus, unsigned int devfn, int where,
197 int size, u32 *value)
199 struct pci_controller *hose = bus->sysdata;
200 unsigned long addr, w;
203 if (mk_conf_addr(bus, devfn, where, hose, &addr, &type1))
204 return PCIBIOS_DEVICE_NOT_FOUND;
206 addr |= (size - 1) * 8;
207 w = conf_read(addr, type1, hose);
210 *value = __kernel_extbl(w, where & 3);
213 *value = __kernel_extwl(w, where & 3);
219 return PCIBIOS_SUCCESSFUL;
223 mcpcia_write_config(struct pci_bus *bus, unsigned int devfn, int where,
226 struct pci_controller *hose = bus->sysdata;
230 if (mk_conf_addr(bus, devfn, where, hose, &addr, &type1))
231 return PCIBIOS_DEVICE_NOT_FOUND;
233 addr |= (size - 1) * 8;
234 value = __kernel_insql(value, where & 3);
235 conf_write(addr, value, type1, hose);
236 return PCIBIOS_SUCCESSFUL;
239 struct pci_ops mcpcia_pci_ops =
241 .read = mcpcia_read_config,
242 .write = mcpcia_write_config,
246 mcpcia_pci_tbi(struct pci_controller *hose, dma_addr_t start, dma_addr_t end)
249 *(vuip)MCPCIA_SG_TBIA(MCPCIA_HOSE2MID(hose->index)) = 0;
254 mcpcia_probe_hose(int h)
256 int cpu = smp_processor_id();
257 int mid = MCPCIA_HOSE2MID(h);
258 unsigned int pci_rev;
260 /* Gotta be REAL careful. If hose is absent, we get an mcheck. */
267 mcheck_expected(cpu) = 2; /* indicates probing */
268 mcheck_taken(cpu) = 0;
269 mcheck_extra(cpu) = mid;
272 /* Access the bus revision word. */
273 pci_rev = *(vuip)MCPCIA_REV(mid);
277 if (mcheck_taken(cpu)) {
278 mcheck_taken(cpu) = 0;
279 pci_rev = 0xffffffff;
282 mcheck_expected(cpu) = 0;
285 return (pci_rev >> 16) == PCI_CLASS_BRIDGE_HOST;
289 mcpcia_new_hose(int h)
291 struct pci_controller *hose;
292 struct resource *io, *mem, *hae_mem;
293 int mid = MCPCIA_HOSE2MID(h);
295 hose = alloc_pci_controller();
298 io = alloc_resource();
299 mem = alloc_resource();
300 hae_mem = alloc_resource();
303 hose->mem_space = hae_mem;
304 hose->sparse_mem_base = MCPCIA_SPARSE(mid) - IDENT_ADDR;
305 hose->dense_mem_base = MCPCIA_DENSE(mid) - IDENT_ADDR;
306 hose->sparse_io_base = MCPCIA_IO(mid) - IDENT_ADDR;
307 hose->dense_io_base = 0;
308 hose->config_space_base = MCPCIA_CONF(mid);
311 io->start = MCPCIA_IO(mid) - MCPCIA_IO_BIAS;
312 io->end = io->start + 0xffff;
313 io->name = pci_io_names[h];
314 io->flags = IORESOURCE_IO;
316 mem->start = MCPCIA_DENSE(mid) - MCPCIA_MEM_BIAS;
317 mem->end = mem->start + 0xffffffff;
318 mem->name = pci_mem_names[h];
319 mem->flags = IORESOURCE_MEM;
321 hae_mem->start = mem->start;
322 hae_mem->end = mem->start + MCPCIA_MEM_MASK;
323 hae_mem->name = pci_hae0_name;
324 hae_mem->flags = IORESOURCE_MEM;
326 if (request_resource(&ioport_resource, io) < 0)
327 printk(KERN_ERR "Failed to request IO on hose %d\n", h);
328 if (request_resource(&iomem_resource, mem) < 0)
329 printk(KERN_ERR "Failed to request MEM on hose %d\n", h);
330 if (request_resource(mem, hae_mem) < 0)
331 printk(KERN_ERR "Failed to request HAE_MEM on hose %d\n", h);
335 mcpcia_pci_clr_err(int mid)
337 *(vuip)MCPCIA_CAP_ERR(mid);
338 *(vuip)MCPCIA_CAP_ERR(mid) = 0xffffffff; /* Clear them all. */
340 *(vuip)MCPCIA_CAP_ERR(mid); /* Re-read for force write. */
344 mcpcia_startup_hose(struct pci_controller *hose)
346 int mid = MCPCIA_HOSE2MID(hose->index);
349 mcpcia_pci_clr_err(mid);
352 * Set up error reporting.
354 tmp = *(vuip)MCPCIA_CAP_ERR(mid);
355 tmp |= 0x0006; /* master/target abort */
356 *(vuip)MCPCIA_CAP_ERR(mid) = tmp;
358 tmp = *(vuip)MCPCIA_CAP_ERR(mid);
361 * Set up the PCI->physical memory translation windows.
363 * Window 0 is scatter-gather 8MB at 8MB (for isa)
364 * Window 1 is scatter-gather (up to) 1GB at 1GB (for pci)
365 * Window 2 is direct access 2GB at 2GB
367 hose->sg_isa = iommu_arena_new(hose, 0x00800000, 0x00800000,
369 hose->sg_pci = iommu_arena_new(hose, 0x40000000,
370 size_for_memory(0x40000000),
373 __direct_map_base = 0x80000000;
374 __direct_map_size = 0x80000000;
376 *(vuip)MCPCIA_W0_BASE(mid) = hose->sg_isa->dma_base | 3;
377 *(vuip)MCPCIA_W0_MASK(mid) = (hose->sg_isa->size - 1) & 0xfff00000;
378 *(vuip)MCPCIA_T0_BASE(mid) = virt_to_phys(hose->sg_isa->ptes) >> 8;
380 *(vuip)MCPCIA_W1_BASE(mid) = hose->sg_pci->dma_base | 3;
381 *(vuip)MCPCIA_W1_MASK(mid) = (hose->sg_pci->size - 1) & 0xfff00000;
382 *(vuip)MCPCIA_T1_BASE(mid) = virt_to_phys(hose->sg_pci->ptes) >> 8;
384 *(vuip)MCPCIA_W2_BASE(mid) = __direct_map_base | 1;
385 *(vuip)MCPCIA_W2_MASK(mid) = (__direct_map_size - 1) & 0xfff00000;
386 *(vuip)MCPCIA_T2_BASE(mid) = 0;
388 *(vuip)MCPCIA_W3_BASE(mid) = 0x0;
390 mcpcia_pci_tbi(hose, 0, -1);
392 *(vuip)MCPCIA_HBASE(mid) = 0x0;
395 *(vuip)MCPCIA_HAE_MEM(mid) = 0U;
397 *(vuip)MCPCIA_HAE_MEM(mid); /* read it back. */
398 *(vuip)MCPCIA_HAE_IO(mid) = 0;
400 *(vuip)MCPCIA_HAE_IO(mid); /* read it back. */
404 mcpcia_init_arch(void)
406 /* With multiple PCI busses, we play with I/O as physical addrs. */
407 ioport_resource.end = ~0UL;
409 /* Allocate hose 0. That's the one that all the ISA junk hangs
410 off of, from which we'll be registering stuff here in a bit.
411 Other hose detection is done in mcpcia_init_hoses, which is
412 called from init_IRQ. */
417 /* This is called from init_IRQ, since we cannot take interrupts
418 before then. Which means we cannot do this in init_arch. */
421 mcpcia_init_hoses(void)
423 struct pci_controller *hose;
427 /* First, find how many hoses we have. */
429 for (h = 0; h < MCPCIA_MAX_HOSES; ++h) {
430 if (mcpcia_probe_hose(h)) {
437 printk("mcpcia_init_hoses: found %d hoses\n", hose_count);
439 /* Now do init for each hose. */
440 for (hose = hose_head; hose; hose = hose->next)
441 mcpcia_startup_hose(hose);
445 mcpcia_print_uncorrectable(struct el_MCPCIA_uncorrected_frame_mcheck *logout)
447 struct el_common_EV5_uncorrectable_mcheck *frame;
450 frame = &logout->procdata;
452 /* Print PAL fields */
453 for (i = 0; i < 24; i += 2) {
454 printk(" paltmp[%d-%d] = %16lx %16lx\n",
455 i, i+1, frame->paltemp[i], frame->paltemp[i+1]);
457 for (i = 0; i < 8; i += 2) {
458 printk(" shadow[%d-%d] = %16lx %16lx\n",
459 i, i+1, frame->shadow[i],
462 printk(" Addr of excepting instruction = %16lx\n",
464 printk(" Summary of arithmetic traps = %16lx\n",
466 printk(" Exception mask = %16lx\n",
468 printk(" Base address for PALcode = %16lx\n",
470 printk(" Interrupt Status Reg = %16lx\n",
472 printk(" CURRENT SETUP OF EV5 IBOX = %16lx\n",
474 printk(" I-CACHE Reg %s parity error = %16lx\n",
475 (frame->ic_perr_stat & 0x800L) ?
477 frame->ic_perr_stat);
478 printk(" D-CACHE error Reg = %16lx\n",
479 frame->dc_perr_stat);
480 if (frame->dc_perr_stat & 0x2) {
481 switch (frame->dc_perr_stat & 0x03c) {
483 printk(" Data error in bank 1\n");
486 printk(" Data error in bank 0\n");
489 printk(" Tag error in bank 1\n");
492 printk(" Tag error in bank 0\n");
496 printk(" Effective VA = %16lx\n",
498 printk(" Reason for D-stream = %16lx\n",
500 printk(" EV5 SCache address = %16lx\n",
502 printk(" EV5 SCache TAG/Data parity = %16lx\n",
504 printk(" EV5 BC_TAG_ADDR = %16lx\n",
506 printk(" EV5 EI_ADDR: Phys addr of Xfer = %16lx\n",
508 printk(" Fill Syndrome = %16lx\n",
509 frame->fill_syndrome);
510 printk(" EI_STAT reg = %16lx\n",
512 printk(" LD_LOCK = %16lx\n",
517 mcpcia_print_system_area(unsigned long la_ptr)
519 struct el_common *frame;
520 struct pci_controller *hose;
522 struct IOD_subpacket {
526 unsigned int pci_rev;
527 unsigned int cap_ctrl;
528 unsigned int hae_mem;
530 unsigned int int_ctl;
531 unsigned int int_reg;
532 unsigned int int_mask0;
533 unsigned int int_mask1;
534 unsigned int mc_err0;
535 unsigned int mc_err1;
536 unsigned int cap_err;
538 unsigned int pci_err1;
539 unsigned int mdpa_stat;
540 unsigned int mdpa_syn;
541 unsigned int mdpb_stat;
542 unsigned int mdpb_syn;
548 frame = (struct el_common *)la_ptr;
549 iodpp = (struct IOD_subpacket *) (la_ptr + frame->sys_offset);
551 for (hose = hose_head; hose; hose = hose->next, iodpp++) {
553 printk("IOD %d Register Subpacket - Bridge Base Address %16lx\n",
554 hose->index, iodpp->base);
555 printk(" WHOAMI = %8x\n", iodpp->whoami);
556 printk(" PCI_REV = %8x\n", iodpp->pci_rev);
557 printk(" CAP_CTRL = %8x\n", iodpp->cap_ctrl);
558 printk(" HAE_MEM = %8x\n", iodpp->hae_mem);
559 printk(" HAE_IO = %8x\n", iodpp->hae_io);
560 printk(" INT_CTL = %8x\n", iodpp->int_ctl);
561 printk(" INT_REG = %8x\n", iodpp->int_reg);
562 printk(" INT_MASK0 = %8x\n", iodpp->int_mask0);
563 printk(" INT_MASK1 = %8x\n", iodpp->int_mask1);
564 printk(" MC_ERR0 = %8x\n", iodpp->mc_err0);
565 printk(" MC_ERR1 = %8x\n", iodpp->mc_err1);
566 printk(" CAP_ERR = %8x\n", iodpp->cap_err);
567 printk(" PCI_ERR1 = %8x\n", iodpp->pci_err1);
568 printk(" MDPA_STAT = %8x\n", iodpp->mdpa_stat);
569 printk(" MDPA_SYN = %8x\n", iodpp->mdpa_syn);
570 printk(" MDPB_STAT = %8x\n", iodpp->mdpb_stat);
571 printk(" MDPB_SYN = %8x\n", iodpp->mdpb_syn);
576 mcpcia_machine_check(unsigned long vector, unsigned long la_ptr)
578 struct el_MCPCIA_uncorrected_frame_mcheck *mchk_logout;
579 unsigned int cpu = smp_processor_id();
582 mchk_logout = (struct el_MCPCIA_uncorrected_frame_mcheck *)la_ptr;
583 expected = mcheck_expected(cpu);
592 /* FIXME: how do we figure out which hose the
594 struct pci_controller *hose;
595 for (hose = hose_head; hose; hose = hose->next)
596 mcpcia_pci_clr_err(MCPCIA_HOSE2MID(hose->index));
600 mcpcia_pci_clr_err(mcheck_extra(cpu));
603 /* Otherwise, we're being called from mcpcia_probe_hose
604 and there's no hose clear an error from. */
611 process_mcheck_info(vector, la_ptr, "MCPCIA", expected != 0);
612 if (!expected && vector != 0x620 && vector != 0x630) {
613 mcpcia_print_uncorrectable(mchk_logout);
614 mcpcia_print_system_area(la_ptr);