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>
31 #include "machvec_impl.h"
33 #if NR_IRQS < MARVEL_NR_IRQS
34 # error NR_IRQS < MARVEL_NR_IRQS !!!
42 io7_device_interrupt(unsigned long vector)
48 * Vector is 0x800 + (interrupt)
50 * where (interrupt) is:
52 * ...16|15 14|13 4|3 0
53 * -----+-----+--------+---
58 * 0x0800 - 0x0ff0 - 0x0800 + (LSI id << 4)
59 * 0x1000 - 0x2ff0 - 0x1000 + (MSI_DAT<8:0> << 4)
62 irq = ((vector & 0xffff) - 0x800) >> 4;
64 irq += 16; /* offset for legacy */
65 irq &= MARVEL_IRQ_VEC_IRQ_MASK; /* not too many bits */
66 irq |= pid << MARVEL_IRQ_VEC_PE_SHIFT; /* merge the pid */
71 static volatile unsigned long *
72 io7_get_irq_ctl(unsigned int irq, struct io7 **pio7)
74 volatile unsigned long *ctl;
78 pid = irq >> MARVEL_IRQ_VEC_PE_SHIFT;
80 if (!(io7 = marvel_find_io7(pid))) {
82 "%s for nonexistent io7 -- vec %x, pid %d\n",
83 __FUNCTION__, irq, pid);
87 irq &= MARVEL_IRQ_VEC_IRQ_MASK; /* isolate the vector */
88 irq -= 16; /* subtract legacy bias */
92 "%s for invalid irq -- pid %d adjusted irq %x\n",
93 __FUNCTION__, pid, irq);
97 ctl = &io7->csrs->PO7_LSI_CTL[irq & 0xff].csr; /* assume LSI */
98 if (irq >= 0x80) /* MSI */
99 ctl = &io7->csrs->PO7_MSI_CTL[((irq - 0x80) >> 5) & 0x0f].csr;
101 if (pio7) *pio7 = io7;
106 io7_enable_irq(unsigned int irq)
108 volatile unsigned long *ctl;
111 ctl = io7_get_irq_ctl(irq, &io7);
113 printk(KERN_ERR "%s: get_ctl failed for irq %x\n",
118 spin_lock(&io7->irq_lock);
122 spin_unlock(&io7->irq_lock);
126 io7_disable_irq(unsigned int irq)
128 volatile unsigned long *ctl;
131 ctl = io7_get_irq_ctl(irq, &io7);
133 printk(KERN_ERR "%s: get_ctl failed for irq %x\n",
138 spin_lock(&io7->irq_lock);
139 *ctl &= ~(1UL << 24);
142 spin_unlock(&io7->irq_lock);
146 io7_startup_irq(unsigned int irq)
149 return 0; /* never anything pending */
153 io7_end_irq(unsigned int irq)
155 if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
160 marvel_irq_noop(unsigned int irq)
166 marvel_irq_noop_return(unsigned int irq)
171 static struct hw_interrupt_type marvel_legacy_irq_type = {
172 .typename = "LEGACY",
173 .startup = marvel_irq_noop_return,
174 .shutdown = marvel_irq_noop,
175 .enable = marvel_irq_noop,
176 .disable = marvel_irq_noop,
177 .ack = marvel_irq_noop,
178 .end = marvel_irq_noop,
181 static struct hw_interrupt_type io7_lsi_irq_type = {
183 .startup = io7_startup_irq,
184 .shutdown = io7_disable_irq,
185 .enable = io7_enable_irq,
186 .disable = io7_disable_irq,
187 .ack = io7_disable_irq,
191 static struct hw_interrupt_type io7_msi_irq_type = {
193 .startup = io7_startup_irq,
194 .shutdown = io7_disable_irq,
195 .enable = io7_enable_irq,
196 .disable = io7_disable_irq,
197 .ack = marvel_irq_noop,
202 io7_redirect_irq(struct io7 *io7,
203 volatile unsigned long *csr,
209 val &= ~(0x1ffUL << 24); /* clear the target pid */
210 val |= ((unsigned long)where << 24); /* set the new target pid */
218 io7_redirect_one_lsi(struct io7 *io7, unsigned int which, unsigned int where)
223 * LSI_CTL has target PID @ 14
225 val = io7->csrs->PO7_LSI_CTL[which].csr;
226 val &= ~(0x1ffUL << 14); /* clear the target pid */
227 val |= ((unsigned long)where << 14); /* set the new target pid */
229 io7->csrs->PO7_LSI_CTL[which].csr = val;
231 io7->csrs->PO7_LSI_CTL[which].csr;
235 io7_redirect_one_msi(struct io7 *io7, unsigned int which, unsigned int where)
240 * MSI_CTL has target PID @ 14
242 val = io7->csrs->PO7_MSI_CTL[which].csr;
243 val &= ~(0x1ffUL << 14); /* clear the target pid */
244 val |= ((unsigned long)where << 14); /* set the new target pid */
246 io7->csrs->PO7_MSI_CTL[which].csr = val;
248 io7->csrs->PO7_MSI_CTL[which].csr;
252 init_one_io7_lsi(struct io7 *io7, unsigned int which, unsigned int where)
255 * LSI_CTL has target PID @ 14
257 io7->csrs->PO7_LSI_CTL[which].csr = ((unsigned long)where << 14);
259 io7->csrs->PO7_LSI_CTL[which].csr;
263 init_one_io7_msi(struct io7 *io7, unsigned int which, unsigned int where)
266 * MSI_CTL has target PID @ 14
268 io7->csrs->PO7_MSI_CTL[which].csr = ((unsigned long)where << 14);
270 io7->csrs->PO7_MSI_CTL[which].csr;
274 init_io7_irqs(struct io7 *io7,
275 struct hw_interrupt_type *lsi_ops,
276 struct hw_interrupt_type *msi_ops)
278 long base = (io7->pe << MARVEL_IRQ_VEC_PE_SHIFT) + 16;
281 printk("Initializing interrupts for IO7 at PE %u - base %lx\n",
285 * Where should interrupts from this IO7 go?
287 * They really should be sent to the local CPU to avoid having to
288 * traverse the mesh, but if it's not an SMP kernel, they have to
289 * go to the boot CPU. Send them all to the boot CPU for now,
290 * as each secondary starts, it can redirect it's local device
293 printk(" Interrupts reported to CPU at PE %u\n", boot_cpuid);
295 spin_lock(&io7->irq_lock);
297 /* set up the error irqs */
298 io7_redirect_irq(io7, &io7->csrs->HLT_CTL.csr, boot_cpuid);
299 io7_redirect_irq(io7, &io7->csrs->HPI_CTL.csr, boot_cpuid);
300 io7_redirect_irq(io7, &io7->csrs->CRD_CTL.csr, boot_cpuid);
301 io7_redirect_irq(io7, &io7->csrs->STV_CTL.csr, boot_cpuid);
302 io7_redirect_irq(io7, &io7->csrs->HEI_CTL.csr, boot_cpuid);
304 /* Set up the lsi irqs. */
305 for (i = 0; i < 128; ++i) {
306 irq_desc[base + i].status = IRQ_DISABLED | IRQ_LEVEL;
307 irq_desc[base + i].chip = lsi_ops;
310 /* Disable the implemented irqs in hardware. */
311 for (i = 0; i < 0x60; ++i)
312 init_one_io7_lsi(io7, i, boot_cpuid);
314 init_one_io7_lsi(io7, 0x74, boot_cpuid);
315 init_one_io7_lsi(io7, 0x75, boot_cpuid);
318 /* Set up the msi irqs. */
319 for (i = 128; i < (128 + 512); ++i) {
320 irq_desc[base + i].status = IRQ_DISABLED | IRQ_LEVEL;
321 irq_desc[base + i].chip = msi_ops;
324 for (i = 0; i < 16; ++i)
325 init_one_io7_msi(io7, i, boot_cpuid);
327 spin_unlock(&io7->irq_lock);
331 marvel_init_irq(void)
334 struct io7 *io7 = NULL;
336 /* Reserve the legacy irqs. */
337 for (i = 0; i < 16; ++i) {
338 irq_desc[i].status = IRQ_DISABLED;
339 irq_desc[i].chip = &marvel_legacy_irq_type;
342 /* Init the io7 irqs. */
343 for (io7 = NULL; (io7 = marvel_next_io7(io7)) != NULL; )
344 init_io7_irqs(io7, &io7_lsi_irq_type, &io7_msi_irq_type);
348 marvel_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
350 struct pci_controller *hose = dev->sysdata;
351 struct io7_port *io7_port = hose->sysdata;
352 struct io7 *io7 = io7_port->io7;
353 int msi_loc, msi_data_off;
359 pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &intline);
362 msi_loc = pci_find_capability(dev, PCI_CAP_ID_MSI);
365 pci_read_config_word(dev, msi_loc + PCI_MSI_FLAGS, &msg_ctl);
367 if (msg_ctl & PCI_MSI_FLAGS_ENABLE) {
368 msi_data_off = PCI_MSI_DATA_32;
369 if (msg_ctl & PCI_MSI_FLAGS_64BIT)
370 msi_data_off = PCI_MSI_DATA_64;
371 pci_read_config_word(dev, msi_loc + msi_data_off, &msg_dat);
373 irq = msg_dat & 0x1ff; /* we use msg_data<8:0> */
374 irq += 0x80; /* offset for lsi */
377 printk("PCI:%d:%d:%d (hose %d) is using MSI\n",
379 PCI_SLOT(dev->devfn),
380 PCI_FUNC(dev->devfn),
382 printk(" %d message(s) from 0x%04x\n",
383 1 << ((msg_ctl & PCI_MSI_FLAGS_QSIZE) >> 4),
385 printk(" reporting on %d IRQ(s) from %d (0x%x)\n",
386 1 << ((msg_ctl & PCI_MSI_FLAGS_QSIZE) >> 4),
387 (irq + 16) | (io7->pe << MARVEL_IRQ_VEC_PE_SHIFT),
388 (irq + 16) | (io7->pe << MARVEL_IRQ_VEC_PE_SHIFT));
392 pci_write_config_word(dev, msi_loc + PCI_MSI_FLAGS,
393 msg_ctl & ~PCI_MSI_FLAGS_ENABLE);
394 pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &intline);
397 printk(" forcing LSI interrupt on irq %d [0x%x]\n", irq, irq);
401 irq += 16; /* offset for legacy */
402 irq |= io7->pe << MARVEL_IRQ_VEC_PE_SHIFT; /* merge the pid */
408 marvel_init_pci(void)
412 marvel_register_error_handlers();
416 locate_and_init_vga(NULL);
418 /* Clear any io7 errors. */
419 for (io7 = NULL; (io7 = marvel_next_io7(io7)) != NULL; )
420 io7_clear_errors(io7);
424 marvel_init_rtc(void)
430 marvel_smp_callin(void)
432 int cpuid = hard_smp_processor_id();
433 struct io7 *io7 = marvel_find_io7(cpuid);
440 * There is a local IO7 - redirect all of its interrupts here.
442 printk("Redirecting IO7 interrupts to local CPU at PE %u\n", cpuid);
444 /* Redirect the error IRQS here. */
445 io7_redirect_irq(io7, &io7->csrs->HLT_CTL.csr, cpuid);
446 io7_redirect_irq(io7, &io7->csrs->HPI_CTL.csr, cpuid);
447 io7_redirect_irq(io7, &io7->csrs->CRD_CTL.csr, cpuid);
448 io7_redirect_irq(io7, &io7->csrs->STV_CTL.csr, cpuid);
449 io7_redirect_irq(io7, &io7->csrs->HEI_CTL.csr, cpuid);
451 /* Redirect the implemented LSIs here. */
452 for (i = 0; i < 0x60; ++i)
453 io7_redirect_one_lsi(io7, i, cpuid);
455 io7_redirect_one_lsi(io7, 0x74, cpuid);
456 io7_redirect_one_lsi(io7, 0x75, cpuid);
458 /* Redirect the MSIs here. */
459 for (i = 0; i < 16; ++i)
460 io7_redirect_one_msi(io7, i, cpuid);
466 struct alpha_machine_vector marvel_ev7_mv __initmv = {
467 .vector_name = "MARVEL/EV7",
471 .machine_check = marvel_machine_check,
472 .max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS,
473 .min_io_address = DEFAULT_IO_BASE,
474 .min_mem_address = DEFAULT_MEM_BASE,
475 .pci_dac_offset = IO7_DAC_OFFSET,
477 .nr_irqs = MARVEL_NR_IRQS,
478 .device_interrupt = io7_device_interrupt,
480 .agp_info = marvel_agp_info,
482 .smp_callin = marvel_smp_callin,
483 .init_arch = marvel_init_arch,
484 .init_irq = marvel_init_irq,
485 .init_rtc = marvel_init_rtc,
486 .init_pci = marvel_init_pci,
487 .kill_arch = marvel_kill_arch,
488 .pci_map_irq = marvel_map_irq,
489 .pci_swizzle = common_swizzle,
491 .pa_to_nid = marvel_pa_to_nid,
492 .cpuid_to_nid = marvel_cpuid_to_nid,
493 .node_mem_start = marvel_node_mem_start,
494 .node_mem_size = marvel_node_mem_size,