2 * linux/arch/alpha/kernel/sys_marvel.c
7 #include <linux/kernel.h>
8 #include <linux/types.h>
10 #include <linux/sched.h>
11 #include <linux/pci.h>
12 #include <linux/init.h>
13 #include <linux/bitops.h>
15 #include <asm/ptrace.h>
16 #include <asm/system.h>
19 #include <asm/mmu_context.h>
21 #include <asm/pgtable.h>
22 #include <asm/core_marvel.h>
23 #include <asm/hwrpb.h>
24 #include <asm/tlbflush.h>
30 #include "machvec_impl.h"
32 #if NR_IRQS < MARVEL_NR_IRQS
33 # error NR_IRQS < MARVEL_NR_IRQS !!!
41 io7_device_interrupt(unsigned long vector)
47 * Vector is 0x800 + (interrupt)
49 * where (interrupt) is:
51 * ...16|15 14|13 4|3 0
52 * -----+-----+--------+---
57 * 0x0800 - 0x0ff0 - 0x0800 + (LSI id << 4)
58 * 0x1000 - 0x2ff0 - 0x1000 + (MSI_DAT<8:0> << 4)
61 irq = ((vector & 0xffff) - 0x800) >> 4;
63 irq += 16; /* offset for legacy */
64 irq &= MARVEL_IRQ_VEC_IRQ_MASK; /* not too many bits */
65 irq |= pid << MARVEL_IRQ_VEC_PE_SHIFT; /* merge the pid */
70 static volatile unsigned long *
71 io7_get_irq_ctl(unsigned int irq, struct io7 **pio7)
73 volatile unsigned long *ctl;
77 pid = irq >> MARVEL_IRQ_VEC_PE_SHIFT;
79 if (!(io7 = marvel_find_io7(pid))) {
81 "%s for nonexistent io7 -- vec %x, pid %d\n",
82 __FUNCTION__, irq, pid);
86 irq &= MARVEL_IRQ_VEC_IRQ_MASK; /* isolate the vector */
87 irq -= 16; /* subtract legacy bias */
91 "%s for invalid irq -- pid %d adjusted irq %x\n",
92 __FUNCTION__, pid, irq);
96 ctl = &io7->csrs->PO7_LSI_CTL[irq & 0xff].csr; /* assume LSI */
97 if (irq >= 0x80) /* MSI */
98 ctl = &io7->csrs->PO7_MSI_CTL[((irq - 0x80) >> 5) & 0x0f].csr;
100 if (pio7) *pio7 = io7;
105 io7_enable_irq(unsigned int irq)
107 volatile unsigned long *ctl;
110 ctl = io7_get_irq_ctl(irq, &io7);
112 printk(KERN_ERR "%s: get_ctl failed for irq %x\n",
117 spin_lock(&io7->irq_lock);
121 spin_unlock(&io7->irq_lock);
125 io7_disable_irq(unsigned int irq)
127 volatile unsigned long *ctl;
130 ctl = io7_get_irq_ctl(irq, &io7);
132 printk(KERN_ERR "%s: get_ctl failed for irq %x\n",
137 spin_lock(&io7->irq_lock);
138 *ctl &= ~(1UL << 24);
141 spin_unlock(&io7->irq_lock);
145 io7_startup_irq(unsigned int irq)
148 return 0; /* never anything pending */
152 io7_end_irq(unsigned int irq)
154 if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
159 marvel_irq_noop(unsigned int irq)
165 marvel_irq_noop_return(unsigned int irq)
170 static struct hw_interrupt_type marvel_legacy_irq_type = {
171 .typename = "LEGACY",
172 .startup = marvel_irq_noop_return,
173 .shutdown = marvel_irq_noop,
174 .enable = marvel_irq_noop,
175 .disable = marvel_irq_noop,
176 .ack = marvel_irq_noop,
177 .end = marvel_irq_noop,
180 static struct hw_interrupt_type io7_lsi_irq_type = {
182 .startup = io7_startup_irq,
183 .shutdown = io7_disable_irq,
184 .enable = io7_enable_irq,
185 .disable = io7_disable_irq,
186 .ack = io7_disable_irq,
190 static struct hw_interrupt_type io7_msi_irq_type = {
192 .startup = io7_startup_irq,
193 .shutdown = io7_disable_irq,
194 .enable = io7_enable_irq,
195 .disable = io7_disable_irq,
196 .ack = marvel_irq_noop,
201 io7_redirect_irq(struct io7 *io7,
202 volatile unsigned long *csr,
208 val &= ~(0x1ffUL << 24); /* clear the target pid */
209 val |= ((unsigned long)where << 24); /* set the new target pid */
217 io7_redirect_one_lsi(struct io7 *io7, unsigned int which, unsigned int where)
222 * LSI_CTL has target PID @ 14
224 val = io7->csrs->PO7_LSI_CTL[which].csr;
225 val &= ~(0x1ffUL << 14); /* clear the target pid */
226 val |= ((unsigned long)where << 14); /* set the new target pid */
228 io7->csrs->PO7_LSI_CTL[which].csr = val;
230 io7->csrs->PO7_LSI_CTL[which].csr;
234 io7_redirect_one_msi(struct io7 *io7, unsigned int which, unsigned int where)
239 * MSI_CTL has target PID @ 14
241 val = io7->csrs->PO7_MSI_CTL[which].csr;
242 val &= ~(0x1ffUL << 14); /* clear the target pid */
243 val |= ((unsigned long)where << 14); /* set the new target pid */
245 io7->csrs->PO7_MSI_CTL[which].csr = val;
247 io7->csrs->PO7_MSI_CTL[which].csr;
251 init_one_io7_lsi(struct io7 *io7, unsigned int which, unsigned int where)
254 * LSI_CTL has target PID @ 14
256 io7->csrs->PO7_LSI_CTL[which].csr = ((unsigned long)where << 14);
258 io7->csrs->PO7_LSI_CTL[which].csr;
262 init_one_io7_msi(struct io7 *io7, unsigned int which, unsigned int where)
265 * MSI_CTL has target PID @ 14
267 io7->csrs->PO7_MSI_CTL[which].csr = ((unsigned long)where << 14);
269 io7->csrs->PO7_MSI_CTL[which].csr;
273 init_io7_irqs(struct io7 *io7,
274 struct hw_interrupt_type *lsi_ops,
275 struct hw_interrupt_type *msi_ops)
277 long base = (io7->pe << MARVEL_IRQ_VEC_PE_SHIFT) + 16;
280 printk("Initializing interrupts for IO7 at PE %u - base %lx\n",
284 * Where should interrupts from this IO7 go?
286 * They really should be sent to the local CPU to avoid having to
287 * traverse the mesh, but if it's not an SMP kernel, they have to
288 * go to the boot CPU. Send them all to the boot CPU for now,
289 * as each secondary starts, it can redirect it's local device
292 printk(" Interrupts reported to CPU at PE %u\n", boot_cpuid);
294 spin_lock(&io7->irq_lock);
296 /* set up the error irqs */
297 io7_redirect_irq(io7, &io7->csrs->HLT_CTL.csr, boot_cpuid);
298 io7_redirect_irq(io7, &io7->csrs->HPI_CTL.csr, boot_cpuid);
299 io7_redirect_irq(io7, &io7->csrs->CRD_CTL.csr, boot_cpuid);
300 io7_redirect_irq(io7, &io7->csrs->STV_CTL.csr, boot_cpuid);
301 io7_redirect_irq(io7, &io7->csrs->HEI_CTL.csr, boot_cpuid);
303 /* Set up the lsi irqs. */
304 for (i = 0; i < 128; ++i) {
305 irq_desc[base + i].status = IRQ_DISABLED | IRQ_LEVEL;
306 irq_desc[base + i].chip = lsi_ops;
309 /* Disable the implemented irqs in hardware. */
310 for (i = 0; i < 0x60; ++i)
311 init_one_io7_lsi(io7, i, boot_cpuid);
313 init_one_io7_lsi(io7, 0x74, boot_cpuid);
314 init_one_io7_lsi(io7, 0x75, boot_cpuid);
317 /* Set up the msi irqs. */
318 for (i = 128; i < (128 + 512); ++i) {
319 irq_desc[base + i].status = IRQ_DISABLED | IRQ_LEVEL;
320 irq_desc[base + i].chip = msi_ops;
323 for (i = 0; i < 16; ++i)
324 init_one_io7_msi(io7, i, boot_cpuid);
326 spin_unlock(&io7->irq_lock);
330 marvel_init_irq(void)
333 struct io7 *io7 = NULL;
335 /* Reserve the legacy irqs. */
336 for (i = 0; i < 16; ++i) {
337 irq_desc[i].status = IRQ_DISABLED;
338 irq_desc[i].chip = &marvel_legacy_irq_type;
341 /* Init the io7 irqs. */
342 for (io7 = NULL; (io7 = marvel_next_io7(io7)) != NULL; )
343 init_io7_irqs(io7, &io7_lsi_irq_type, &io7_msi_irq_type);
347 marvel_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
349 struct pci_controller *hose = dev->sysdata;
350 struct io7_port *io7_port = hose->sysdata;
351 struct io7 *io7 = io7_port->io7;
352 int msi_loc, msi_data_off;
358 pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &intline);
361 msi_loc = pci_find_capability(dev, PCI_CAP_ID_MSI);
364 pci_read_config_word(dev, msi_loc + PCI_MSI_FLAGS, &msg_ctl);
366 if (msg_ctl & PCI_MSI_FLAGS_ENABLE) {
367 msi_data_off = PCI_MSI_DATA_32;
368 if (msg_ctl & PCI_MSI_FLAGS_64BIT)
369 msi_data_off = PCI_MSI_DATA_64;
370 pci_read_config_word(dev, msi_loc + msi_data_off, &msg_dat);
372 irq = msg_dat & 0x1ff; /* we use msg_data<8:0> */
373 irq += 0x80; /* offset for lsi */
376 printk("PCI:%d:%d:%d (hose %d) is using MSI\n",
378 PCI_SLOT(dev->devfn),
379 PCI_FUNC(dev->devfn),
381 printk(" %d message(s) from 0x%04x\n",
382 1 << ((msg_ctl & PCI_MSI_FLAGS_QSIZE) >> 4),
384 printk(" reporting on %d IRQ(s) from %d (0x%x)\n",
385 1 << ((msg_ctl & PCI_MSI_FLAGS_QSIZE) >> 4),
386 (irq + 16) | (io7->pe << MARVEL_IRQ_VEC_PE_SHIFT),
387 (irq + 16) | (io7->pe << MARVEL_IRQ_VEC_PE_SHIFT));
391 pci_write_config_word(dev, msi_loc + PCI_MSI_FLAGS,
392 msg_ctl & ~PCI_MSI_FLAGS_ENABLE);
393 pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &intline);
396 printk(" forcing LSI interrupt on irq %d [0x%x]\n", irq, irq);
400 irq += 16; /* offset for legacy */
401 irq |= io7->pe << MARVEL_IRQ_VEC_PE_SHIFT; /* merge the pid */
407 marvel_init_pci(void)
411 marvel_register_error_handlers();
416 #ifdef CONFIG_VGA_HOSE
417 locate_and_init_vga(NULL);
420 /* Clear any io7 errors. */
421 for (io7 = NULL; (io7 = marvel_next_io7(io7)) != NULL; )
422 io7_clear_errors(io7);
426 marvel_init_rtc(void)
432 marvel_smp_callin(void)
434 int cpuid = hard_smp_processor_id();
435 struct io7 *io7 = marvel_find_io7(cpuid);
442 * There is a local IO7 - redirect all of its interrupts here.
444 printk("Redirecting IO7 interrupts to local CPU at PE %u\n", cpuid);
446 /* Redirect the error IRQS here. */
447 io7_redirect_irq(io7, &io7->csrs->HLT_CTL.csr, cpuid);
448 io7_redirect_irq(io7, &io7->csrs->HPI_CTL.csr, cpuid);
449 io7_redirect_irq(io7, &io7->csrs->CRD_CTL.csr, cpuid);
450 io7_redirect_irq(io7, &io7->csrs->STV_CTL.csr, cpuid);
451 io7_redirect_irq(io7, &io7->csrs->HEI_CTL.csr, cpuid);
453 /* Redirect the implemented LSIs here. */
454 for (i = 0; i < 0x60; ++i)
455 io7_redirect_one_lsi(io7, i, cpuid);
457 io7_redirect_one_lsi(io7, 0x74, cpuid);
458 io7_redirect_one_lsi(io7, 0x75, cpuid);
460 /* Redirect the MSIs here. */
461 for (i = 0; i < 16; ++i)
462 io7_redirect_one_msi(io7, i, cpuid);
468 struct alpha_machine_vector marvel_ev7_mv __initmv = {
469 .vector_name = "MARVEL/EV7",
473 .machine_check = marvel_machine_check,
474 .max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS,
475 .min_io_address = DEFAULT_IO_BASE,
476 .min_mem_address = DEFAULT_MEM_BASE,
477 .pci_dac_offset = IO7_DAC_OFFSET,
479 .nr_irqs = MARVEL_NR_IRQS,
480 .device_interrupt = io7_device_interrupt,
482 .agp_info = marvel_agp_info,
484 .smp_callin = marvel_smp_callin,
485 .init_arch = marvel_init_arch,
486 .init_irq = marvel_init_irq,
487 .init_rtc = marvel_init_rtc,
488 .init_pci = marvel_init_pci,
489 .kill_arch = marvel_kill_arch,
490 .pci_map_irq = marvel_map_irq,
491 .pci_swizzle = common_swizzle,
493 .pa_to_nid = marvel_pa_to_nid,
494 .cpuid_to_nid = marvel_cpuid_to_nid,
495 .node_mem_start = marvel_node_mem_start,
496 .node_mem_size = marvel_node_mem_size,