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>
26 /* Save Tsunami configuration data as the console had it set up. */
30 unsigned long wsba[4];
33 } saved_config[2] __attribute__((common));
36 * NOTE: Herein lie back-to-back mb instructions. They are magic.
37 * One plausible explanation is that the I/O controller does not properly
38 * handle the system transaction. Another involves timing. Ho hum.
42 * BIOS32-style PCI interface:
45 #define DEBUG_CONFIG 0
48 # define DBG_CFG(args) printk args
50 # define DBG_CFG(args)
55 * Given a bus, device, and function number, compute resulting
56 * configuration space address
57 * accordingly. It is therefore not safe to have concurrent
58 * invocations to configuration space access routines, but there
59 * really shouldn't be any need for this.
61 * Note that all config space accesses use Type 1 address format.
63 * Note also that type 1 is determined by non-zero bus number.
67 * 3 3|3 3 2 2|2 2 2 2|2 2 2 2|1 1 1 1|1 1 1 1|1 1
68 * 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
69 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
70 * | | | | | | | | | | |B|B|B|B|B|B|B|B|D|D|D|D|D|F|F|F|R|R|R|R|R|R|0|1|
71 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
74 * 23:16 bus number (8 bits = 128 possible buses)
75 * 15:11 Device number (5 bits)
76 * 10:8 function number
80 * The function number selects which function of a multi-function device
81 * (e.g., SCSI and Ethernet).
83 * The register selects a DWORD (32 bit) register offset. Hence it
84 * doesn't get shifted by 2 bits as we want to "drop" the bottom two
89 mk_conf_addr(struct pci_bus *pbus, unsigned int device_fn, int where,
90 unsigned long *pci_addr, unsigned char *type1)
92 struct pci_controller *hose = pbus->sysdata;
94 u8 bus = pbus->number;
96 DBG_CFG(("mk_conf_addr(bus=%d ,device_fn=0x%x, where=0x%x, "
97 "pci_addr=0x%p, type1=0x%p)\n",
98 bus, device_fn, where, pci_addr, type1));
100 if (!pbus->parent) /* No parent means peer PCI bus. */
104 addr = (bus << 16) | (device_fn << 8) | where;
105 addr |= hose->config_space_base;
108 DBG_CFG(("mk_conf_addr: returning pci_addr 0x%lx\n", addr));
113 tsunami_read_config(struct pci_bus *bus, unsigned int devfn, int where,
114 int size, u32 *value)
119 if (mk_conf_addr(bus, devfn, where, &addr, &type1))
120 return PCIBIOS_DEVICE_NOT_FOUND;
124 *value = __kernel_ldbu(*(vucp)addr);
127 *value = __kernel_ldwu(*(vusp)addr);
130 *value = *(vuip)addr;
134 return PCIBIOS_SUCCESSFUL;
138 tsunami_write_config(struct pci_bus *bus, unsigned int devfn, int where,
144 if (mk_conf_addr(bus, devfn, where, &addr, &type1))
145 return PCIBIOS_DEVICE_NOT_FOUND;
149 __kernel_stb(value, *(vucp)addr);
151 __kernel_ldbu(*(vucp)addr);
154 __kernel_stw(value, *(vusp)addr);
156 __kernel_ldwu(*(vusp)addr);
165 return PCIBIOS_SUCCESSFUL;
168 struct pci_ops tsunami_pci_ops =
170 .read = tsunami_read_config,
171 .write = tsunami_write_config,
175 tsunami_pci_tbi(struct pci_controller *hose, dma_addr_t start, dma_addr_t end)
177 tsunami_pchip *pchip = hose->index ? TSUNAMI_pchip1 : TSUNAMI_pchip0;
178 volatile unsigned long *csr;
181 /* We can invalidate up to 8 tlb entries in a go. The flush
182 matches against <31:16> in the pci address. */
183 csr = &pchip->tlbia.csr;
184 if (((start ^ end) & 0xffff0000) == 0)
185 csr = &pchip->tlbiv.csr;
187 /* For TBIA, it doesn't matter what value we write. For TBI,
188 it's the shifted tag bits. */
189 value = (start & 0xffff0000) >> 12;
196 #ifdef NXM_MACHINE_CHECKS_ON_TSUNAMI
198 tsunami_probe_read(volatile unsigned long *vaddr)
200 long dont_care, probe_result;
201 int cpu = smp_processor_id();
202 int s = swpipl(IPL_MCHECK - 1);
204 mcheck_taken(cpu) = 0;
205 mcheck_expected(cpu) = 1;
209 mcheck_expected(cpu) = 0;
210 probe_result = !mcheck_taken(cpu);
211 mcheck_taken(cpu) = 0;
214 printk("dont_care == 0x%lx\n", dont_care);
220 tsunami_probe_write(volatile unsigned long *vaddr)
222 long true_contents, probe_result = 1;
224 TSUNAMI_cchip->misc.csr |= (1L << 28); /* clear NXM... */
225 true_contents = *vaddr;
228 if (TSUNAMI_cchip->misc.csr & (1L << 28)) {
229 int source = (TSUNAMI_cchip->misc.csr >> 29) & 7;
230 TSUNAMI_cchip->misc.csr |= (1L << 28); /* ...and unlock NXS. */
232 printk("tsunami_probe_write: unit %d at 0x%016lx\n", source,
233 (unsigned long)vaddr);
236 *vaddr = true_contents;
240 #define tsunami_probe_read(ADDR) 1
241 #endif /* NXM_MACHINE_CHECKS_ON_TSUNAMI */
243 #define FN __FUNCTION__
246 tsunami_init_one_pchip(tsunami_pchip *pchip, int index)
248 struct pci_controller *hose;
250 if (tsunami_probe_read(&pchip->pctl.csr) == 0)
253 hose = alloc_pci_controller();
256 hose->io_space = alloc_resource();
257 hose->mem_space = alloc_resource();
259 /* This is for userland consumption. For some reason, the 40-bit
260 PIO bias that we use in the kernel through KSEG didn't work for
261 the page table based user mappings. So make sure we get the
263 hose->sparse_mem_base = 0;
264 hose->sparse_io_base = 0;
266 = (TSUNAMI_MEM(index) & 0xffffffffffL) | 0x80000000000L;
268 = (TSUNAMI_IO(index) & 0xffffffffffL) | 0x80000000000L;
270 hose->config_space_base = TSUNAMI_CONF(index);
273 hose->io_space->start = TSUNAMI_IO(index) - TSUNAMI_IO_BIAS;
274 hose->io_space->end = hose->io_space->start + TSUNAMI_IO_SPACE - 1;
275 hose->io_space->name = pci_io_names[index];
276 hose->io_space->flags = IORESOURCE_IO;
278 hose->mem_space->start = TSUNAMI_MEM(index) - TSUNAMI_MEM_BIAS;
279 hose->mem_space->end = hose->mem_space->start + 0xffffffff;
280 hose->mem_space->name = pci_mem_names[index];
281 hose->mem_space->flags = IORESOURCE_MEM;
283 if (request_resource(&ioport_resource, hose->io_space) < 0)
284 printk(KERN_ERR "Failed to request IO on hose %d\n", index);
285 if (request_resource(&iomem_resource, hose->mem_space) < 0)
286 printk(KERN_ERR "Failed to request MEM on hose %d\n", index);
289 * Save the existing PCI window translations. SRM will
290 * need them when we go to reboot.
293 saved_config[index].wsba[0] = pchip->wsba[0].csr;
294 saved_config[index].wsm[0] = pchip->wsm[0].csr;
295 saved_config[index].tba[0] = pchip->tba[0].csr;
297 saved_config[index].wsba[1] = pchip->wsba[1].csr;
298 saved_config[index].wsm[1] = pchip->wsm[1].csr;
299 saved_config[index].tba[1] = pchip->tba[1].csr;
301 saved_config[index].wsba[2] = pchip->wsba[2].csr;
302 saved_config[index].wsm[2] = pchip->wsm[2].csr;
303 saved_config[index].tba[2] = pchip->tba[2].csr;
305 saved_config[index].wsba[3] = pchip->wsba[3].csr;
306 saved_config[index].wsm[3] = pchip->wsm[3].csr;
307 saved_config[index].tba[3] = pchip->tba[3].csr;
310 * Set up the PCI to main memory translation windows.
312 * Note: Window 3 is scatter-gather only
314 * Window 0 is scatter-gather 8MB at 8MB (for isa)
315 * Window 1 is scatter-gather (up to) 1GB at 1GB
316 * Window 2 is direct access 2GB at 2GB
318 * NOTE: we need the align_entry settings for Acer devices on ES40,
319 * specifically floppy and IDE when memory is larger than 2GB.
321 hose->sg_isa = iommu_arena_new(hose, 0x00800000, 0x00800000, 0);
322 /* Initially set for 4 PTEs, but will be overridden to 64K for ISA. */
323 hose->sg_isa->align_entry = 4;
325 hose->sg_pci = iommu_arena_new(hose, 0x40000000,
326 size_for_memory(0x40000000), 0);
327 hose->sg_pci->align_entry = 4; /* Tsunami caches 4 PTEs at a time */
329 __direct_map_base = 0x80000000;
330 __direct_map_size = 0x80000000;
332 pchip->wsba[0].csr = hose->sg_isa->dma_base | 3;
333 pchip->wsm[0].csr = (hose->sg_isa->size - 1) & 0xfff00000;
334 pchip->tba[0].csr = virt_to_phys(hose->sg_isa->ptes);
336 pchip->wsba[1].csr = hose->sg_pci->dma_base | 3;
337 pchip->wsm[1].csr = (hose->sg_pci->size - 1) & 0xfff00000;
338 pchip->tba[1].csr = virt_to_phys(hose->sg_pci->ptes);
340 pchip->wsba[2].csr = 0x80000000 | 1;
341 pchip->wsm[2].csr = (0x80000000 - 1) & 0xfff00000;
342 pchip->tba[2].csr = 0;
344 pchip->wsba[3].csr = 0;
346 /* Enable the Monster Window to make DAC pci64 possible. */
347 pchip->pctl.csr |= pctl_m_mwin;
349 tsunami_pci_tbi(hose, 0, -1);
353 tsunami_init_arch(void)
355 #ifdef NXM_MACHINE_CHECKS_ON_TSUNAMI
358 /* Ho hum.. init_arch is called before init_IRQ, but we need to be
359 able to handle machine checks. So install the handler now. */
362 /* NXMs just don't matter to Tsunami--unless they make it
364 tmp = (unsigned long)(TSUNAMI_cchip - 1);
365 printk("%s: probing bogus address: 0x%016lx\n", FN, bogus_addr);
366 printk("\tprobe %s\n",
367 tsunami_probe_write((unsigned long *)bogus_addr)
368 ? "succeeded" : "failed");
369 #endif /* NXM_MACHINE_CHECKS_ON_TSUNAMI */
372 printk("%s: CChip registers:\n", FN);
373 printk("%s: CSR_CSC 0x%lx\n", FN, TSUNAMI_cchip->csc.csr);
374 printk("%s: CSR_MTR 0x%lx\n", FN, TSUNAMI_cchip.mtr.csr);
375 printk("%s: CSR_MISC 0x%lx\n", FN, TSUNAMI_cchip->misc.csr);
376 printk("%s: CSR_DIM0 0x%lx\n", FN, TSUNAMI_cchip->dim0.csr);
377 printk("%s: CSR_DIM1 0x%lx\n", FN, TSUNAMI_cchip->dim1.csr);
378 printk("%s: CSR_DIR0 0x%lx\n", FN, TSUNAMI_cchip->dir0.csr);
379 printk("%s: CSR_DIR1 0x%lx\n", FN, TSUNAMI_cchip->dir1.csr);
380 printk("%s: CSR_DRIR 0x%lx\n", FN, TSUNAMI_cchip->drir.csr);
382 printk("%s: DChip registers:\n");
383 printk("%s: CSR_DSC 0x%lx\n", FN, TSUNAMI_dchip->dsc.csr);
384 printk("%s: CSR_STR 0x%lx\n", FN, TSUNAMI_dchip->str.csr);
385 printk("%s: CSR_DREV 0x%lx\n", FN, TSUNAMI_dchip->drev.csr);
387 /* With multiple PCI busses, we play with I/O as physical addrs. */
388 ioport_resource.end = ~0UL;
390 /* Find how many hoses we have, and initialize them. TSUNAMI
391 and TYPHOON can have 2, but might only have 1 (DS10). */
393 tsunami_init_one_pchip(TSUNAMI_pchip0, 0);
394 if (TSUNAMI_cchip->csc.csr & 1L<<14)
395 tsunami_init_one_pchip(TSUNAMI_pchip1, 1);
399 tsunami_kill_one_pchip(tsunami_pchip *pchip, int index)
401 pchip->wsba[0].csr = saved_config[index].wsba[0];
402 pchip->wsm[0].csr = saved_config[index].wsm[0];
403 pchip->tba[0].csr = saved_config[index].tba[0];
405 pchip->wsba[1].csr = saved_config[index].wsba[1];
406 pchip->wsm[1].csr = saved_config[index].wsm[1];
407 pchip->tba[1].csr = saved_config[index].tba[1];
409 pchip->wsba[2].csr = saved_config[index].wsba[2];
410 pchip->wsm[2].csr = saved_config[index].wsm[2];
411 pchip->tba[2].csr = saved_config[index].tba[2];
413 pchip->wsba[3].csr = saved_config[index].wsba[3];
414 pchip->wsm[3].csr = saved_config[index].wsm[3];
415 pchip->tba[3].csr = saved_config[index].tba[3];
419 tsunami_kill_arch(int mode)
421 tsunami_kill_one_pchip(TSUNAMI_pchip0, 0);
422 if (TSUNAMI_cchip->csc.csr & 1L<<14)
423 tsunami_kill_one_pchip(TSUNAMI_pchip1, 1);
427 tsunami_pci_clr_err_1(tsunami_pchip *pchip)
430 pchip->perror.csr = 0x040;
436 tsunami_pci_clr_err(void)
438 tsunami_pci_clr_err_1(TSUNAMI_pchip0);
440 /* TSUNAMI and TYPHOON can have 2, but might only have 1 (DS10) */
441 if (TSUNAMI_cchip->csc.csr & 1L<<14)
442 tsunami_pci_clr_err_1(TSUNAMI_pchip1);
446 tsunami_machine_check(unsigned long vector, unsigned long la_ptr,
447 struct pt_regs * regs)
449 /* Clear error before any reporting. */
453 tsunami_pci_clr_err();
457 process_mcheck_info(vector, la_ptr, regs, "TSUNAMI",
458 mcheck_expected(smp_processor_id()));