2 * linux/arch/alpha/kernel/core_tsunami.c
4 * Based on code written by David A. Rusling (david.rusling@reo.mts.dec.com).
6 * Code common to all TSUNAMI core logic chips.
9 #define __EXTERN_INLINE inline
11 #include <asm/core_tsunami.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/bootmem.h>
20 #include <asm/ptrace.h>
27 /* Save Tsunami configuration data as the console had it set up. */
31 unsigned long wsba[4];
34 } saved_config[2] __attribute__((common));
37 * NOTE: Herein lie back-to-back mb instructions. They are magic.
38 * One plausible explanation is that the I/O controller does not properly
39 * handle the system transaction. Another involves timing. Ho hum.
43 * BIOS32-style PCI interface:
46 #define DEBUG_CONFIG 0
49 # define DBG_CFG(args) printk args
51 # define DBG_CFG(args)
56 * Given a bus, device, and function number, compute resulting
57 * configuration space address
58 * accordingly. It is therefore not safe to have concurrent
59 * invocations to configuration space access routines, but there
60 * really shouldn't be any need for this.
62 * Note that all config space accesses use Type 1 address format.
64 * Note also that type 1 is determined by non-zero bus number.
68 * 3 3|3 3 2 2|2 2 2 2|2 2 2 2|1 1 1 1|1 1 1 1|1 1
69 * 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
70 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
71 * | | | | | | | | | | |B|B|B|B|B|B|B|B|D|D|D|D|D|F|F|F|R|R|R|R|R|R|0|1|
72 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
75 * 23:16 bus number (8 bits = 128 possible buses)
76 * 15:11 Device number (5 bits)
77 * 10:8 function number
81 * The function number selects which function of a multi-function device
82 * (e.g., SCSI and Ethernet).
84 * The register selects a DWORD (32 bit) register offset. Hence it
85 * doesn't get shifted by 2 bits as we want to "drop" the bottom two
90 mk_conf_addr(struct pci_bus *pbus, unsigned int device_fn, int where,
91 unsigned long *pci_addr, unsigned char *type1)
93 struct pci_controller *hose = pbus->sysdata;
95 u8 bus = pbus->number;
97 DBG_CFG(("mk_conf_addr(bus=%d ,device_fn=0x%x, where=0x%x, "
98 "pci_addr=0x%p, type1=0x%p)\n",
99 bus, device_fn, where, pci_addr, type1));
101 if (!pbus->parent) /* No parent means peer PCI bus. */
105 addr = (bus << 16) | (device_fn << 8) | where;
106 addr |= hose->config_space_base;
109 DBG_CFG(("mk_conf_addr: returning pci_addr 0x%lx\n", addr));
114 tsunami_read_config(struct pci_bus *bus, unsigned int devfn, int where,
115 int size, u32 *value)
120 if (mk_conf_addr(bus, devfn, where, &addr, &type1))
121 return PCIBIOS_DEVICE_NOT_FOUND;
125 *value = __kernel_ldbu(*(vucp)addr);
128 *value = __kernel_ldwu(*(vusp)addr);
131 *value = *(vuip)addr;
135 return PCIBIOS_SUCCESSFUL;
139 tsunami_write_config(struct pci_bus *bus, unsigned int devfn, int where,
145 if (mk_conf_addr(bus, devfn, where, &addr, &type1))
146 return PCIBIOS_DEVICE_NOT_FOUND;
150 __kernel_stb(value, *(vucp)addr);
152 __kernel_ldbu(*(vucp)addr);
155 __kernel_stw(value, *(vusp)addr);
157 __kernel_ldwu(*(vusp)addr);
166 return PCIBIOS_SUCCESSFUL;
169 struct pci_ops tsunami_pci_ops =
171 .read = tsunami_read_config,
172 .write = tsunami_write_config,
176 tsunami_pci_tbi(struct pci_controller *hose, dma_addr_t start, dma_addr_t end)
178 tsunami_pchip *pchip = hose->index ? TSUNAMI_pchip1 : TSUNAMI_pchip0;
179 volatile unsigned long *csr;
182 /* We can invalidate up to 8 tlb entries in a go. The flush
183 matches against <31:16> in the pci address. */
184 csr = &pchip->tlbia.csr;
185 if (((start ^ end) & 0xffff0000) == 0)
186 csr = &pchip->tlbiv.csr;
188 /* For TBIA, it doesn't matter what value we write. For TBI,
189 it's the shifted tag bits. */
190 value = (start & 0xffff0000) >> 12;
197 #ifdef NXM_MACHINE_CHECKS_ON_TSUNAMI
199 tsunami_probe_read(volatile unsigned long *vaddr)
201 long dont_care, probe_result;
202 int cpu = smp_processor_id();
203 int s = swpipl(IPL_MCHECK - 1);
205 mcheck_taken(cpu) = 0;
206 mcheck_expected(cpu) = 1;
210 mcheck_expected(cpu) = 0;
211 probe_result = !mcheck_taken(cpu);
212 mcheck_taken(cpu) = 0;
215 printk("dont_care == 0x%lx\n", dont_care);
221 tsunami_probe_write(volatile unsigned long *vaddr)
223 long true_contents, probe_result = 1;
225 TSUNAMI_cchip->misc.csr |= (1L << 28); /* clear NXM... */
226 true_contents = *vaddr;
229 if (TSUNAMI_cchip->misc.csr & (1L << 28)) {
230 int source = (TSUNAMI_cchip->misc.csr >> 29) & 7;
231 TSUNAMI_cchip->misc.csr |= (1L << 28); /* ...and unlock NXS. */
233 printk("tsunami_probe_write: unit %d at 0x%016lx\n", source,
234 (unsigned long)vaddr);
237 *vaddr = true_contents;
241 #define tsunami_probe_read(ADDR) 1
242 #endif /* NXM_MACHINE_CHECKS_ON_TSUNAMI */
244 #define FN __FUNCTION__
247 tsunami_init_one_pchip(tsunami_pchip *pchip, int index)
249 struct pci_controller *hose;
251 if (tsunami_probe_read(&pchip->pctl.csr) == 0)
254 hose = alloc_pci_controller();
257 hose->io_space = alloc_resource();
258 hose->mem_space = alloc_resource();
260 /* This is for userland consumption. For some reason, the 40-bit
261 PIO bias that we use in the kernel through KSEG didn't work for
262 the page table based user mappings. So make sure we get the
264 hose->sparse_mem_base = 0;
265 hose->sparse_io_base = 0;
267 = (TSUNAMI_MEM(index) & 0xffffffffffL) | 0x80000000000L;
269 = (TSUNAMI_IO(index) & 0xffffffffffL) | 0x80000000000L;
271 hose->config_space_base = TSUNAMI_CONF(index);
274 hose->io_space->start = TSUNAMI_IO(index) - TSUNAMI_IO_BIAS;
275 hose->io_space->end = hose->io_space->start + TSUNAMI_IO_SPACE - 1;
276 hose->io_space->name = pci_io_names[index];
277 hose->io_space->flags = IORESOURCE_IO;
279 hose->mem_space->start = TSUNAMI_MEM(index) - TSUNAMI_MEM_BIAS;
280 hose->mem_space->end = hose->mem_space->start + 0xffffffff;
281 hose->mem_space->name = pci_mem_names[index];
282 hose->mem_space->flags = IORESOURCE_MEM;
284 if (request_resource(&ioport_resource, hose->io_space) < 0)
285 printk(KERN_ERR "Failed to request IO on hose %d\n", index);
286 if (request_resource(&iomem_resource, hose->mem_space) < 0)
287 printk(KERN_ERR "Failed to request MEM on hose %d\n", index);
290 * Save the existing PCI window translations. SRM will
291 * need them when we go to reboot.
294 saved_config[index].wsba[0] = pchip->wsba[0].csr;
295 saved_config[index].wsm[0] = pchip->wsm[0].csr;
296 saved_config[index].tba[0] = pchip->tba[0].csr;
298 saved_config[index].wsba[1] = pchip->wsba[1].csr;
299 saved_config[index].wsm[1] = pchip->wsm[1].csr;
300 saved_config[index].tba[1] = pchip->tba[1].csr;
302 saved_config[index].wsba[2] = pchip->wsba[2].csr;
303 saved_config[index].wsm[2] = pchip->wsm[2].csr;
304 saved_config[index].tba[2] = pchip->tba[2].csr;
306 saved_config[index].wsba[3] = pchip->wsba[3].csr;
307 saved_config[index].wsm[3] = pchip->wsm[3].csr;
308 saved_config[index].tba[3] = pchip->tba[3].csr;
311 * Set up the PCI to main memory translation windows.
313 * Note: Window 3 is scatter-gather only
315 * Window 0 is scatter-gather 8MB at 8MB (for isa)
316 * Window 1 is scatter-gather (up to) 1GB at 1GB
317 * Window 2 is direct access 2GB at 2GB
319 * NOTE: we need the align_entry settings for Acer devices on ES40,
320 * specifically floppy and IDE when memory is larger than 2GB.
322 hose->sg_isa = iommu_arena_new(hose, 0x00800000, 0x00800000, 0);
323 /* Initially set for 4 PTEs, but will be overridden to 64K for ISA. */
324 hose->sg_isa->align_entry = 4;
326 hose->sg_pci = iommu_arena_new(hose, 0x40000000,
327 size_for_memory(0x40000000), 0);
328 hose->sg_pci->align_entry = 4; /* Tsunami caches 4 PTEs at a time */
330 __direct_map_base = 0x80000000;
331 __direct_map_size = 0x80000000;
333 pchip->wsba[0].csr = hose->sg_isa->dma_base | 3;
334 pchip->wsm[0].csr = (hose->sg_isa->size - 1) & 0xfff00000;
335 pchip->tba[0].csr = virt_to_phys(hose->sg_isa->ptes);
337 pchip->wsba[1].csr = hose->sg_pci->dma_base | 3;
338 pchip->wsm[1].csr = (hose->sg_pci->size - 1) & 0xfff00000;
339 pchip->tba[1].csr = virt_to_phys(hose->sg_pci->ptes);
341 pchip->wsba[2].csr = 0x80000000 | 1;
342 pchip->wsm[2].csr = (0x80000000 - 1) & 0xfff00000;
343 pchip->tba[2].csr = 0;
345 pchip->wsba[3].csr = 0;
347 /* Enable the Monster Window to make DAC pci64 possible. */
348 pchip->pctl.csr |= pctl_m_mwin;
350 tsunami_pci_tbi(hose, 0, -1);
355 tsunami_ioportmap(unsigned long addr)
357 FIXUP_IOADDR_VGA(addr);
358 return (void __iomem *)(addr + TSUNAMI_IO_BIAS);
362 tsunami_ioremap(unsigned long addr, unsigned long size)
364 FIXUP_MEMADDR_VGA(addr);
365 return (void __iomem *)(addr + TSUNAMI_MEM_BIAS);
368 #ifndef CONFIG_ALPHA_GENERIC
369 EXPORT_SYMBOL(tsunami_ioportmap);
370 EXPORT_SYMBOL(tsunami_ioremap);
374 tsunami_init_arch(void)
376 #ifdef NXM_MACHINE_CHECKS_ON_TSUNAMI
379 /* Ho hum.. init_arch is called before init_IRQ, but we need to be
380 able to handle machine checks. So install the handler now. */
383 /* NXMs just don't matter to Tsunami--unless they make it
385 tmp = (unsigned long)(TSUNAMI_cchip - 1);
386 printk("%s: probing bogus address: 0x%016lx\n", FN, bogus_addr);
387 printk("\tprobe %s\n",
388 tsunami_probe_write((unsigned long *)bogus_addr)
389 ? "succeeded" : "failed");
390 #endif /* NXM_MACHINE_CHECKS_ON_TSUNAMI */
393 printk("%s: CChip registers:\n", FN);
394 printk("%s: CSR_CSC 0x%lx\n", FN, TSUNAMI_cchip->csc.csr);
395 printk("%s: CSR_MTR 0x%lx\n", FN, TSUNAMI_cchip.mtr.csr);
396 printk("%s: CSR_MISC 0x%lx\n", FN, TSUNAMI_cchip->misc.csr);
397 printk("%s: CSR_DIM0 0x%lx\n", FN, TSUNAMI_cchip->dim0.csr);
398 printk("%s: CSR_DIM1 0x%lx\n", FN, TSUNAMI_cchip->dim1.csr);
399 printk("%s: CSR_DIR0 0x%lx\n", FN, TSUNAMI_cchip->dir0.csr);
400 printk("%s: CSR_DIR1 0x%lx\n", FN, TSUNAMI_cchip->dir1.csr);
401 printk("%s: CSR_DRIR 0x%lx\n", FN, TSUNAMI_cchip->drir.csr);
403 printk("%s: DChip registers:\n");
404 printk("%s: CSR_DSC 0x%lx\n", FN, TSUNAMI_dchip->dsc.csr);
405 printk("%s: CSR_STR 0x%lx\n", FN, TSUNAMI_dchip->str.csr);
406 printk("%s: CSR_DREV 0x%lx\n", FN, TSUNAMI_dchip->drev.csr);
408 /* With multiple PCI busses, we play with I/O as physical addrs. */
409 ioport_resource.end = ~0UL;
411 /* Find how many hoses we have, and initialize them. TSUNAMI
412 and TYPHOON can have 2, but might only have 1 (DS10). */
414 tsunami_init_one_pchip(TSUNAMI_pchip0, 0);
415 if (TSUNAMI_cchip->csc.csr & 1L<<14)
416 tsunami_init_one_pchip(TSUNAMI_pchip1, 1);
418 /* Check for graphic console location (if any). */
419 find_console_vga_hose();
423 tsunami_kill_one_pchip(tsunami_pchip *pchip, int index)
425 pchip->wsba[0].csr = saved_config[index].wsba[0];
426 pchip->wsm[0].csr = saved_config[index].wsm[0];
427 pchip->tba[0].csr = saved_config[index].tba[0];
429 pchip->wsba[1].csr = saved_config[index].wsba[1];
430 pchip->wsm[1].csr = saved_config[index].wsm[1];
431 pchip->tba[1].csr = saved_config[index].tba[1];
433 pchip->wsba[2].csr = saved_config[index].wsba[2];
434 pchip->wsm[2].csr = saved_config[index].wsm[2];
435 pchip->tba[2].csr = saved_config[index].tba[2];
437 pchip->wsba[3].csr = saved_config[index].wsba[3];
438 pchip->wsm[3].csr = saved_config[index].wsm[3];
439 pchip->tba[3].csr = saved_config[index].tba[3];
443 tsunami_kill_arch(int mode)
445 tsunami_kill_one_pchip(TSUNAMI_pchip0, 0);
446 if (TSUNAMI_cchip->csc.csr & 1L<<14)
447 tsunami_kill_one_pchip(TSUNAMI_pchip1, 1);
451 tsunami_pci_clr_err_1(tsunami_pchip *pchip)
454 pchip->perror.csr = 0x040;
460 tsunami_pci_clr_err(void)
462 tsunami_pci_clr_err_1(TSUNAMI_pchip0);
464 /* TSUNAMI and TYPHOON can have 2, but might only have 1 (DS10) */
465 if (TSUNAMI_cchip->csc.csr & 1L<<14)
466 tsunami_pci_clr_err_1(TSUNAMI_pchip1);
470 tsunami_machine_check(unsigned long vector, unsigned long la_ptr)
472 /* Clear error before any reporting. */
476 tsunami_pci_clr_err();
480 process_mcheck_info(vector, la_ptr, "TSUNAMI",
481 mcheck_expected(smp_processor_id()));