2 * linux/arch/alpha/kernel/core_tsunami.c
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/module.h>
15 #include <linux/types.h>
16 #include <linux/pci.h>
17 #include <linux/sched.h>
18 #include <linux/init.h>
19 #include <linux/bootmem.h>
21 #include <asm/ptrace.h>
28 /* Save Tsunami configuration data as the console had it set up. */
32 unsigned long wsba[4];
35 } saved_config[2] __attribute__((common));
38 * NOTE: Herein lie back-to-back mb instructions. They are magic.
39 * One plausible explanation is that the I/O controller does not properly
40 * handle the system transaction. Another involves timing. Ho hum.
44 * BIOS32-style PCI interface:
47 #define DEBUG_CONFIG 0
50 # define DBG_CFG(args) printk args
52 # define DBG_CFG(args)
57 * Given a bus, device, and function number, compute resulting
58 * configuration space address
59 * accordingly. It is therefore not safe to have concurrent
60 * invocations to configuration space access routines, but there
61 * really shouldn't be any need for this.
63 * Note that all config space accesses use Type 1 address format.
65 * Note also that type 1 is determined by non-zero bus number.
69 * 3 3|3 3 2 2|2 2 2 2|2 2 2 2|1 1 1 1|1 1 1 1|1 1
70 * 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
71 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
72 * | | | | | | | | | | |B|B|B|B|B|B|B|B|D|D|D|D|D|F|F|F|R|R|R|R|R|R|0|1|
73 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
76 * 23:16 bus number (8 bits = 128 possible buses)
77 * 15:11 Device number (5 bits)
78 * 10:8 function number
82 * The function number selects which function of a multi-function device
83 * (e.g., SCSI and Ethernet).
85 * The register selects a DWORD (32 bit) register offset. Hence it
86 * doesn't get shifted by 2 bits as we want to "drop" the bottom two
91 mk_conf_addr(struct pci_bus *pbus, unsigned int device_fn, int where,
92 unsigned long *pci_addr, unsigned char *type1)
94 struct pci_controller *hose = pbus->sysdata;
96 u8 bus = pbus->number;
98 DBG_CFG(("mk_conf_addr(bus=%d ,device_fn=0x%x, where=0x%x, "
99 "pci_addr=0x%p, type1=0x%p)\n",
100 bus, device_fn, where, pci_addr, type1));
102 if (!pbus->parent) /* No parent means peer PCI bus. */
106 addr = (bus << 16) | (device_fn << 8) | where;
107 addr |= hose->config_space_base;
110 DBG_CFG(("mk_conf_addr: returning pci_addr 0x%lx\n", addr));
115 tsunami_read_config(struct pci_bus *bus, unsigned int devfn, int where,
116 int size, u32 *value)
121 if (mk_conf_addr(bus, devfn, where, &addr, &type1))
122 return PCIBIOS_DEVICE_NOT_FOUND;
126 *value = __kernel_ldbu(*(vucp)addr);
129 *value = __kernel_ldwu(*(vusp)addr);
132 *value = *(vuip)addr;
136 return PCIBIOS_SUCCESSFUL;
140 tsunami_write_config(struct pci_bus *bus, unsigned int devfn, int where,
146 if (mk_conf_addr(bus, devfn, where, &addr, &type1))
147 return PCIBIOS_DEVICE_NOT_FOUND;
151 __kernel_stb(value, *(vucp)addr);
153 __kernel_ldbu(*(vucp)addr);
156 __kernel_stw(value, *(vusp)addr);
158 __kernel_ldwu(*(vusp)addr);
167 return PCIBIOS_SUCCESSFUL;
170 struct pci_ops tsunami_pci_ops =
172 .read = tsunami_read_config,
173 .write = tsunami_write_config,
177 tsunami_pci_tbi(struct pci_controller *hose, dma_addr_t start, dma_addr_t end)
179 tsunami_pchip *pchip = hose->index ? TSUNAMI_pchip1 : TSUNAMI_pchip0;
180 volatile unsigned long *csr;
183 /* We can invalidate up to 8 tlb entries in a go. The flush
184 matches against <31:16> in the pci address. */
185 csr = &pchip->tlbia.csr;
186 if (((start ^ end) & 0xffff0000) == 0)
187 csr = &pchip->tlbiv.csr;
189 /* For TBIA, it doesn't matter what value we write. For TBI,
190 it's the shifted tag bits. */
191 value = (start & 0xffff0000) >> 12;
198 #ifdef NXM_MACHINE_CHECKS_ON_TSUNAMI
200 tsunami_probe_read(volatile unsigned long *vaddr)
202 long dont_care, probe_result;
203 int cpu = smp_processor_id();
204 int s = swpipl(IPL_MCHECK - 1);
206 mcheck_taken(cpu) = 0;
207 mcheck_expected(cpu) = 1;
211 mcheck_expected(cpu) = 0;
212 probe_result = !mcheck_taken(cpu);
213 mcheck_taken(cpu) = 0;
216 printk("dont_care == 0x%lx\n", dont_care);
222 tsunami_probe_write(volatile unsigned long *vaddr)
224 long true_contents, probe_result = 1;
226 TSUNAMI_cchip->misc.csr |= (1L << 28); /* clear NXM... */
227 true_contents = *vaddr;
230 if (TSUNAMI_cchip->misc.csr & (1L << 28)) {
231 int source = (TSUNAMI_cchip->misc.csr >> 29) & 7;
232 TSUNAMI_cchip->misc.csr |= (1L << 28); /* ...and unlock NXS. */
234 printk("tsunami_probe_write: unit %d at 0x%016lx\n", source,
235 (unsigned long)vaddr);
238 *vaddr = true_contents;
242 #define tsunami_probe_read(ADDR) 1
243 #endif /* NXM_MACHINE_CHECKS_ON_TSUNAMI */
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);
354 tsunami_ioportmap(unsigned long addr)
356 FIXUP_IOADDR_VGA(addr);
357 return (void __iomem *)(addr + TSUNAMI_IO_BIAS);
361 tsunami_ioremap(unsigned long addr, unsigned long size)
363 FIXUP_MEMADDR_VGA(addr);
364 return (void __iomem *)(addr + TSUNAMI_MEM_BIAS);
367 #ifndef CONFIG_ALPHA_GENERIC
368 EXPORT_SYMBOL(tsunami_ioportmap);
369 EXPORT_SYMBOL(tsunami_ioremap);
373 tsunami_init_arch(void)
375 #ifdef NXM_MACHINE_CHECKS_ON_TSUNAMI
378 /* Ho hum.. init_arch is called before init_IRQ, but we need to be
379 able to handle machine checks. So install the handler now. */
382 /* NXMs just don't matter to Tsunami--unless they make it
384 tmp = (unsigned long)(TSUNAMI_cchip - 1);
385 printk("%s: probing bogus address: 0x%016lx\n", __func__, bogus_addr);
386 printk("\tprobe %s\n",
387 tsunami_probe_write((unsigned long *)bogus_addr)
388 ? "succeeded" : "failed");
389 #endif /* NXM_MACHINE_CHECKS_ON_TSUNAMI */
392 printk("%s: CChip registers:\n", __func__);
393 printk("%s: CSR_CSC 0x%lx\n", __func__, TSUNAMI_cchip->csc.csr);
394 printk("%s: CSR_MTR 0x%lx\n", __func__, TSUNAMI_cchip.mtr.csr);
395 printk("%s: CSR_MISC 0x%lx\n", __func__, TSUNAMI_cchip->misc.csr);
396 printk("%s: CSR_DIM0 0x%lx\n", __func__, TSUNAMI_cchip->dim0.csr);
397 printk("%s: CSR_DIM1 0x%lx\n", __func__, TSUNAMI_cchip->dim1.csr);
398 printk("%s: CSR_DIR0 0x%lx\n", __func__, TSUNAMI_cchip->dir0.csr);
399 printk("%s: CSR_DIR1 0x%lx\n", __func__, TSUNAMI_cchip->dir1.csr);
400 printk("%s: CSR_DRIR 0x%lx\n", __func__, TSUNAMI_cchip->drir.csr);
402 printk("%s: DChip registers:\n");
403 printk("%s: CSR_DSC 0x%lx\n", __func__, TSUNAMI_dchip->dsc.csr);
404 printk("%s: CSR_STR 0x%lx\n", __func__, TSUNAMI_dchip->str.csr);
405 printk("%s: CSR_DREV 0x%lx\n", __func__, TSUNAMI_dchip->drev.csr);
407 /* With multiple PCI busses, we play with I/O as physical addrs. */
408 ioport_resource.end = ~0UL;
410 /* Find how many hoses we have, and initialize them. TSUNAMI
411 and TYPHOON can have 2, but might only have 1 (DS10). */
413 tsunami_init_one_pchip(TSUNAMI_pchip0, 0);
414 if (TSUNAMI_cchip->csc.csr & 1L<<14)
415 tsunami_init_one_pchip(TSUNAMI_pchip1, 1);
417 /* Check for graphic console location (if any). */
418 find_console_vga_hose();
422 tsunami_kill_one_pchip(tsunami_pchip *pchip, int index)
424 pchip->wsba[0].csr = saved_config[index].wsba[0];
425 pchip->wsm[0].csr = saved_config[index].wsm[0];
426 pchip->tba[0].csr = saved_config[index].tba[0];
428 pchip->wsba[1].csr = saved_config[index].wsba[1];
429 pchip->wsm[1].csr = saved_config[index].wsm[1];
430 pchip->tba[1].csr = saved_config[index].tba[1];
432 pchip->wsba[2].csr = saved_config[index].wsba[2];
433 pchip->wsm[2].csr = saved_config[index].wsm[2];
434 pchip->tba[2].csr = saved_config[index].tba[2];
436 pchip->wsba[3].csr = saved_config[index].wsba[3];
437 pchip->wsm[3].csr = saved_config[index].wsm[3];
438 pchip->tba[3].csr = saved_config[index].tba[3];
442 tsunami_kill_arch(int mode)
444 tsunami_kill_one_pchip(TSUNAMI_pchip0, 0);
445 if (TSUNAMI_cchip->csc.csr & 1L<<14)
446 tsunami_kill_one_pchip(TSUNAMI_pchip1, 1);
450 tsunami_pci_clr_err_1(tsunami_pchip *pchip)
453 pchip->perror.csr = 0x040;
459 tsunami_pci_clr_err(void)
461 tsunami_pci_clr_err_1(TSUNAMI_pchip0);
463 /* TSUNAMI and TYPHOON can have 2, but might only have 1 (DS10) */
464 if (TSUNAMI_cchip->csc.csr & 1L<<14)
465 tsunami_pci_clr_err_1(TSUNAMI_pchip1);
469 tsunami_machine_check(unsigned long vector, unsigned long la_ptr)
471 /* Clear error before any reporting. */
475 tsunami_pci_clr_err();
479 process_mcheck_info(vector, la_ptr, "TSUNAMI",
480 mcheck_expected(smp_processor_id()));