Adrian Bunk | 88278ca | 2008-05-19 16:53:02 -0700 | [diff] [blame] | 1 | /* |
Sam Ravnborg | fd49bf4 | 2011-01-28 22:08:24 +0000 | [diff] [blame] | 2 | * Interrupt request handling routines. On the |
| 3 | * Sparc the IRQs are basically 'cast in stone' |
| 4 | * and you are supposed to probe the prom's device |
| 5 | * node trees to find out who's got which IRQ. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | * |
| 7 | * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) |
| 8 | * Copyright (C) 1995 Miguel de Icaza (miguel@nuclecu.unam.mx) |
| 9 | * Copyright (C) 1995,2002 Pete A. Zaitcev (zaitcev@yahoo.com) |
| 10 | * Copyright (C) 1996 Dave Redman (djhr@tadpole.co.uk) |
| 11 | * Copyright (C) 1998-2000 Anton Blanchard (anton@samba.org) |
| 12 | */ |
| 13 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | #include <linux/kernel_stat.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | #include <linux/seq_file.h> |
| 16 | |
Sam Ravnborg | a2a211c | 2011-02-25 22:59:20 -0800 | [diff] [blame] | 17 | #include <asm/cacheflush.h> |
Sam Ravnborg | 6baa9b2 | 2011-04-18 11:25:44 +0000 | [diff] [blame] | 18 | #include <asm/cpudata.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | #include <asm/pcic.h> |
Konrad Eisele | 0fd7ef1 | 2009-08-17 00:13:31 +0000 | [diff] [blame] | 20 | #include <asm/leon.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | |
Sam Ravnborg | 81265fd | 2008-12-08 01:08:24 -0800 | [diff] [blame] | 22 | #include "kernel.h" |
Al Viro | 32231a6 | 2007-07-21 19:18:57 -0700 | [diff] [blame] | 23 | #include "irq.h" |
| 24 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #ifdef CONFIG_SMP |
| 26 | #define SMP_NOP2 "nop; nop;\n\t" |
| 27 | #define SMP_NOP3 "nop; nop; nop;\n\t" |
| 28 | #else |
| 29 | #define SMP_NOP2 |
| 30 | #define SMP_NOP3 |
| 31 | #endif /* SMP */ |
Sam Ravnborg | fd49bf4 | 2011-01-28 22:08:24 +0000 | [diff] [blame] | 32 | |
Sam Ravnborg | bbdc266 | 2011-02-25 23:00:19 -0800 | [diff] [blame] | 33 | /* platform specific irq setup */ |
| 34 | struct sparc_irq_config sparc_irq_config; |
| 35 | |
David Howells | df9ee29 | 2010-10-07 14:08:55 +0100 | [diff] [blame] | 36 | unsigned long arch_local_irq_save(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | { |
| 38 | unsigned long retval; |
| 39 | unsigned long tmp; |
| 40 | |
| 41 | __asm__ __volatile__( |
| 42 | "rd %%psr, %0\n\t" |
| 43 | SMP_NOP3 /* Sun4m + Cypress + SMP bug */ |
| 44 | "or %0, %2, %1\n\t" |
| 45 | "wr %1, 0, %%psr\n\t" |
| 46 | "nop; nop; nop\n" |
| 47 | : "=&r" (retval), "=r" (tmp) |
| 48 | : "i" (PSR_PIL) |
| 49 | : "memory"); |
| 50 | |
| 51 | return retval; |
| 52 | } |
David Howells | df9ee29 | 2010-10-07 14:08:55 +0100 | [diff] [blame] | 53 | EXPORT_SYMBOL(arch_local_irq_save); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | |
David Howells | df9ee29 | 2010-10-07 14:08:55 +0100 | [diff] [blame] | 55 | void arch_local_irq_enable(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | { |
| 57 | unsigned long tmp; |
| 58 | |
| 59 | __asm__ __volatile__( |
| 60 | "rd %%psr, %0\n\t" |
| 61 | SMP_NOP3 /* Sun4m + Cypress + SMP bug */ |
| 62 | "andn %0, %1, %0\n\t" |
| 63 | "wr %0, 0, %%psr\n\t" |
| 64 | "nop; nop; nop\n" |
| 65 | : "=&r" (tmp) |
| 66 | : "i" (PSR_PIL) |
| 67 | : "memory"); |
| 68 | } |
David Howells | df9ee29 | 2010-10-07 14:08:55 +0100 | [diff] [blame] | 69 | EXPORT_SYMBOL(arch_local_irq_enable); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | |
David Howells | df9ee29 | 2010-10-07 14:08:55 +0100 | [diff] [blame] | 71 | void arch_local_irq_restore(unsigned long old_psr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | { |
| 73 | unsigned long tmp; |
| 74 | |
| 75 | __asm__ __volatile__( |
| 76 | "rd %%psr, %0\n\t" |
| 77 | "and %2, %1, %2\n\t" |
| 78 | SMP_NOP2 /* Sun4m + Cypress + SMP bug */ |
| 79 | "andn %0, %1, %0\n\t" |
| 80 | "wr %0, %2, %%psr\n\t" |
| 81 | "nop; nop; nop\n" |
| 82 | : "=&r" (tmp) |
| 83 | : "i" (PSR_PIL), "r" (old_psr) |
| 84 | : "memory"); |
| 85 | } |
David Howells | df9ee29 | 2010-10-07 14:08:55 +0100 | [diff] [blame] | 86 | EXPORT_SYMBOL(arch_local_irq_restore); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | |
| 88 | /* |
| 89 | * Dave Redman (djhr@tadpole.co.uk) |
| 90 | * |
| 91 | * IRQ numbers.. These are no longer restricted to 15.. |
| 92 | * |
| 93 | * this is done to enable SBUS cards and onboard IO to be masked |
| 94 | * correctly. using the interrupt level isn't good enough. |
| 95 | * |
| 96 | * For example: |
| 97 | * A device interrupting at sbus level6 and the Floppy both come in |
| 98 | * at IRQ11, but enabling and disabling them requires writing to |
| 99 | * different bits in the SLAVIO/SEC. |
| 100 | * |
| 101 | * As a result of these changes sun4m machines could now support |
| 102 | * directed CPU interrupts using the existing enable/disable irq code |
| 103 | * with tweaks. |
| 104 | * |
Sam Ravnborg | 6baa9b2 | 2011-04-18 11:25:44 +0000 | [diff] [blame] | 105 | * Sun4d complicates things even further. IRQ numbers are arbitrary |
| 106 | * 32-bit values in that case. Since this is similar to sparc64, |
| 107 | * we adopt a virtual IRQ numbering scheme as is done there. |
| 108 | * Virutal interrupt numbers are allocated by build_irq(). So NR_IRQS |
| 109 | * just becomes a limit of how many interrupt sources we can handle in |
| 110 | * a single system. Even fully loaded SS2000 machines top off at |
| 111 | * about 32 interrupt sources or so, therefore a NR_IRQS value of 64 |
| 112 | * is more than enough. |
| 113 | * |
| 114 | * We keep a map of per-PIL enable interrupts. These get wired |
| 115 | * up via the irq_chip->startup() method which gets invoked by |
| 116 | * the generic IRQ layer during request_irq(). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | */ |
| 118 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | |
Sam Ravnborg | 6baa9b2 | 2011-04-18 11:25:44 +0000 | [diff] [blame] | 120 | /* Table of allocated irqs. Unused entries has irq == 0 */ |
| 121 | static struct irq_bucket irq_table[NR_IRQS]; |
| 122 | /* Protect access to irq_table */ |
| 123 | static DEFINE_SPINLOCK(irq_table_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | |
Sam Ravnborg | 6baa9b2 | 2011-04-18 11:25:44 +0000 | [diff] [blame] | 125 | /* Map between the irq identifier used in hw to the irq_bucket. */ |
| 126 | struct irq_bucket *irq_map[SUN4D_MAX_IRQ]; |
| 127 | /* Protect access to irq_map */ |
| 128 | static DEFINE_SPINLOCK(irq_map_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | |
Sam Ravnborg | 6baa9b2 | 2011-04-18 11:25:44 +0000 | [diff] [blame] | 130 | /* Allocate a new irq from the irq_table */ |
| 131 | unsigned int irq_alloc(unsigned int real_irq, unsigned int pil) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | unsigned long flags; |
Sam Ravnborg | 6baa9b2 | 2011-04-18 11:25:44 +0000 | [diff] [blame] | 134 | unsigned int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | |
Sam Ravnborg | 6baa9b2 | 2011-04-18 11:25:44 +0000 | [diff] [blame] | 136 | spin_lock_irqsave(&irq_table_lock, flags); |
| 137 | for (i = 1; i < NR_IRQS; i++) { |
| 138 | if (irq_table[i].real_irq == real_irq && irq_table[i].pil == pil) |
| 139 | goto found; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | } |
Sam Ravnborg | 6baa9b2 | 2011-04-18 11:25:44 +0000 | [diff] [blame] | 141 | |
| 142 | for (i = 1; i < NR_IRQS; i++) { |
| 143 | if (!irq_table[i].irq) |
| 144 | break; |
| 145 | } |
| 146 | |
| 147 | if (i < NR_IRQS) { |
| 148 | irq_table[i].real_irq = real_irq; |
| 149 | irq_table[i].irq = i; |
| 150 | irq_table[i].pil = pil; |
| 151 | } else { |
| 152 | printk(KERN_ERR "IRQ: Out of virtual IRQs.\n"); |
| 153 | i = 0; |
| 154 | } |
| 155 | found: |
| 156 | spin_unlock_irqrestore(&irq_table_lock, flags); |
| 157 | |
| 158 | return i; |
| 159 | } |
| 160 | |
| 161 | /* Based on a single pil handler_irq may need to call several |
| 162 | * interrupt handlers. Use irq_map as entry to irq_table, |
| 163 | * and let each entry in irq_table point to the next entry. |
| 164 | */ |
| 165 | void irq_link(unsigned int irq) |
| 166 | { |
| 167 | struct irq_bucket *p; |
| 168 | unsigned long flags; |
| 169 | unsigned int pil; |
| 170 | |
| 171 | BUG_ON(irq >= NR_IRQS); |
| 172 | |
| 173 | spin_lock_irqsave(&irq_map_lock, flags); |
| 174 | |
| 175 | p = &irq_table[irq]; |
| 176 | pil = p->pil; |
| 177 | BUG_ON(pil > SUN4D_MAX_IRQ); |
| 178 | p->next = irq_map[pil]; |
| 179 | irq_map[pil] = p; |
| 180 | |
| 181 | spin_unlock_irqrestore(&irq_map_lock, flags); |
| 182 | } |
| 183 | |
| 184 | void irq_unlink(unsigned int irq) |
| 185 | { |
| 186 | struct irq_bucket *p, **pnext; |
| 187 | unsigned long flags; |
| 188 | |
| 189 | BUG_ON(irq >= NR_IRQS); |
| 190 | |
| 191 | spin_lock_irqsave(&irq_map_lock, flags); |
| 192 | |
| 193 | p = &irq_table[irq]; |
| 194 | BUG_ON(p->pil > SUN4D_MAX_IRQ); |
| 195 | pnext = &irq_map[p->pil]; |
| 196 | while (*pnext != p) |
| 197 | pnext = &(*pnext)->next; |
| 198 | *pnext = p->next; |
| 199 | |
| 200 | spin_unlock_irqrestore(&irq_map_lock, flags); |
| 201 | } |
| 202 | |
| 203 | |
| 204 | /* /proc/interrupts printing */ |
| 205 | int arch_show_interrupts(struct seq_file *p, int prec) |
| 206 | { |
| 207 | int j; |
| 208 | |
Daniel Hellstrom | d6d0481 | 2011-05-02 00:08:51 +0000 | [diff] [blame] | 209 | #ifdef CONFIG_SMP |
| 210 | seq_printf(p, "RES: "); |
| 211 | for_each_online_cpu(j) |
| 212 | seq_printf(p, "%10u ", cpu_data(j).irq_resched_count); |
| 213 | seq_printf(p, " IPI rescheduling interrupts\n"); |
| 214 | seq_printf(p, "CAL: "); |
| 215 | for_each_online_cpu(j) |
| 216 | seq_printf(p, "%10u ", cpu_data(j).irq_call_count); |
| 217 | seq_printf(p, " IPI function call interrupts\n"); |
| 218 | #endif |
Sam Ravnborg | 6baa9b2 | 2011-04-18 11:25:44 +0000 | [diff] [blame] | 219 | seq_printf(p, "NMI: "); |
| 220 | for_each_online_cpu(j) |
| 221 | seq_printf(p, "%10u ", cpu_data(j).counter); |
| 222 | seq_printf(p, " Non-maskable interrupts\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | return 0; |
| 224 | } |
| 225 | |
Sam Ravnborg | 6baa9b2 | 2011-04-18 11:25:44 +0000 | [diff] [blame] | 226 | void handler_irq(unsigned int pil, struct pt_regs *regs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | { |
Al Viro | 0d84438 | 2006-10-08 14:30:44 +0100 | [diff] [blame] | 228 | struct pt_regs *old_regs; |
Sam Ravnborg | 6baa9b2 | 2011-04-18 11:25:44 +0000 | [diff] [blame] | 229 | struct irq_bucket *p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | |
Sam Ravnborg | 6baa9b2 | 2011-04-18 11:25:44 +0000 | [diff] [blame] | 231 | BUG_ON(pil > 15); |
Al Viro | 0d84438 | 2006-10-08 14:30:44 +0100 | [diff] [blame] | 232 | old_regs = set_irq_regs(regs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | irq_enter(); |
Sam Ravnborg | 6baa9b2 | 2011-04-18 11:25:44 +0000 | [diff] [blame] | 234 | |
| 235 | p = irq_map[pil]; |
| 236 | while (p) { |
| 237 | struct irq_bucket *next = p->next; |
| 238 | |
| 239 | generic_handle_irq(p->irq); |
| 240 | p = next; |
| 241 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | irq_exit(); |
Al Viro | 0d84438 | 2006-10-08 14:30:44 +0100 | [diff] [blame] | 243 | set_irq_regs(old_regs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | } |
| 245 | |
David S. Miller | 0a808a3 | 2007-08-02 00:19:14 -0700 | [diff] [blame] | 246 | #if defined(CONFIG_BLK_DEV_FD) || defined(CONFIG_BLK_DEV_FD_MODULE) |
Sam Ravnborg | 6baa9b2 | 2011-04-18 11:25:44 +0000 | [diff] [blame] | 247 | static unsigned int floppy_irq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | |
Sam Ravnborg | 6baa9b2 | 2011-04-18 11:25:44 +0000 | [diff] [blame] | 249 | int sparc_floppy_request_irq(unsigned int irq, irq_handler_t irq_handler) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | unsigned int cpu_irq; |
Sam Ravnborg | 6baa9b2 | 2011-04-18 11:25:44 +0000 | [diff] [blame] | 252 | int err; |
| 253 | |
Namhyung Kim | 5167232 | 2010-10-25 05:52:38 +0000 | [diff] [blame] | 254 | #if defined CONFIG_SMP && !defined CONFIG_SPARC_LEON |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | struct tt_entry *trap_table; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | |
Sam Ravnborg | 6baa9b2 | 2011-04-18 11:25:44 +0000 | [diff] [blame] | 258 | err = request_irq(irq, irq_handler, 0, "floppy", NULL); |
| 259 | if (err) |
| 260 | return -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | |
Sam Ravnborg | 6baa9b2 | 2011-04-18 11:25:44 +0000 | [diff] [blame] | 262 | /* Save for later use in floppy interrupt handler */ |
| 263 | floppy_irq = irq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | |
Sam Ravnborg | 6baa9b2 | 2011-04-18 11:25:44 +0000 | [diff] [blame] | 265 | cpu_irq = (irq & (NR_IRQS - 1)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | |
| 267 | /* Dork with trap table if we get this far. */ |
| 268 | #define INSTANTIATE(table) \ |
| 269 | table[SP_TRAP_IRQ1+(cpu_irq-1)].inst_one = SPARC_RD_PSR_L0; \ |
| 270 | table[SP_TRAP_IRQ1+(cpu_irq-1)].inst_two = \ |
Sam Ravnborg | 6baa9b2 | 2011-04-18 11:25:44 +0000 | [diff] [blame] | 271 | SPARC_BRANCH((unsigned long) floppy_hardint, \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | (unsigned long) &table[SP_TRAP_IRQ1+(cpu_irq-1)].inst_two);\ |
| 273 | table[SP_TRAP_IRQ1+(cpu_irq-1)].inst_three = SPARC_RD_WIM_L3; \ |
| 274 | table[SP_TRAP_IRQ1+(cpu_irq-1)].inst_four = SPARC_NOP; |
| 275 | |
| 276 | INSTANTIATE(sparc_ttable) |
Namhyung Kim | 5167232 | 2010-10-25 05:52:38 +0000 | [diff] [blame] | 277 | #if defined CONFIG_SMP && !defined CONFIG_SPARC_LEON |
Sam Ravnborg | fd49bf4 | 2011-01-28 22:08:24 +0000 | [diff] [blame] | 278 | trap_table = &trapbase_cpu1; |
| 279 | INSTANTIATE(trap_table) |
| 280 | trap_table = &trapbase_cpu2; |
| 281 | INSTANTIATE(trap_table) |
| 282 | trap_table = &trapbase_cpu3; |
| 283 | INSTANTIATE(trap_table) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | #endif |
| 285 | #undef INSTANTIATE |
| 286 | /* |
| 287 | * XXX Correct thing whould be to flush only I- and D-cache lines |
| 288 | * which contain the handler in question. But as of time of the |
| 289 | * writing we have no CPU-neutral interface to fine-grained flushes. |
| 290 | */ |
| 291 | flush_cache_all(); |
Sam Ravnborg | 6baa9b2 | 2011-04-18 11:25:44 +0000 | [diff] [blame] | 292 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | } |
Sam Ravnborg | 6baa9b2 | 2011-04-18 11:25:44 +0000 | [diff] [blame] | 294 | EXPORT_SYMBOL(sparc_floppy_request_irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | |
Sam Ravnborg | fd49bf4 | 2011-01-28 22:08:24 +0000 | [diff] [blame] | 296 | /* |
| 297 | * These variables are used to access state from the assembler |
David S. Miller | 0a808a3 | 2007-08-02 00:19:14 -0700 | [diff] [blame] | 298 | * interrupt handler, floppy_hardint, so we cannot put these in |
| 299 | * the floppy driver image because that would not work in the |
| 300 | * modular case. |
| 301 | */ |
| 302 | volatile unsigned char *fdc_status; |
| 303 | EXPORT_SYMBOL(fdc_status); |
| 304 | |
| 305 | char *pdma_vaddr; |
| 306 | EXPORT_SYMBOL(pdma_vaddr); |
| 307 | |
| 308 | unsigned long pdma_size; |
| 309 | EXPORT_SYMBOL(pdma_size); |
| 310 | |
| 311 | volatile int doing_pdma; |
| 312 | EXPORT_SYMBOL(doing_pdma); |
| 313 | |
| 314 | char *pdma_base; |
| 315 | EXPORT_SYMBOL(pdma_base); |
| 316 | |
| 317 | unsigned long pdma_areasize; |
| 318 | EXPORT_SYMBOL(pdma_areasize); |
| 319 | |
Sam Ravnborg | 6baa9b2 | 2011-04-18 11:25:44 +0000 | [diff] [blame] | 320 | /* Use the generic irq support to call floppy_interrupt |
| 321 | * which was setup using request_irq() in sparc_floppy_request_irq(). |
| 322 | * We only have one floppy interrupt so we do not need to check |
| 323 | * for additional handlers being wired up by irq_link() |
| 324 | */ |
David S. Miller | 0a808a3 | 2007-08-02 00:19:14 -0700 | [diff] [blame] | 325 | void sparc_floppy_irq(int irq, void *dev_id, struct pt_regs *regs) |
| 326 | { |
| 327 | struct pt_regs *old_regs; |
David S. Miller | 0a808a3 | 2007-08-02 00:19:14 -0700 | [diff] [blame] | 328 | |
| 329 | old_regs = set_irq_regs(regs); |
David S. Miller | 0a808a3 | 2007-08-02 00:19:14 -0700 | [diff] [blame] | 330 | irq_enter(); |
Sam Ravnborg | 6baa9b2 | 2011-04-18 11:25:44 +0000 | [diff] [blame] | 331 | generic_handle_irq(floppy_irq); |
David S. Miller | 0a808a3 | 2007-08-02 00:19:14 -0700 | [diff] [blame] | 332 | irq_exit(); |
David S. Miller | 0a808a3 | 2007-08-02 00:19:14 -0700 | [diff] [blame] | 333 | set_irq_regs(old_regs); |
David S. Miller | 0a808a3 | 2007-08-02 00:19:14 -0700 | [diff] [blame] | 334 | } |
David S. Miller | 0a808a3 | 2007-08-02 00:19:14 -0700 | [diff] [blame] | 335 | #endif |
| 336 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | /* djhr |
| 338 | * This could probably be made indirect too and assigned in the CPU |
| 339 | * bits of the code. That would be much nicer I think and would also |
| 340 | * fit in with the idea of being able to tune your kernel for your machine |
| 341 | * by removing unrequired machine and device support. |
| 342 | * |
| 343 | */ |
| 344 | |
| 345 | void __init init_IRQ(void) |
| 346 | { |
Sam Ravnborg | fd49bf4 | 2011-01-28 22:08:24 +0000 | [diff] [blame] | 347 | switch (sparc_cpu_model) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | case sun4c: |
| 349 | case sun4: |
| 350 | sun4c_init_IRQ(); |
| 351 | break; |
| 352 | |
| 353 | case sun4m: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | pcic_probe(); |
Sam Ravnborg | 06010fb | 2011-04-17 13:49:55 +0200 | [diff] [blame] | 355 | if (pcic_present()) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | sun4m_pci_init_IRQ(); |
Sam Ravnborg | 06010fb | 2011-04-17 13:49:55 +0200 | [diff] [blame] | 357 | else |
| 358 | sun4m_init_IRQ(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | break; |
Sam Ravnborg | fd49bf4 | 2011-01-28 22:08:24 +0000 | [diff] [blame] | 360 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | case sun4d: |
| 362 | sun4d_init_IRQ(); |
| 363 | break; |
| 364 | |
Konrad Eisele | 0fd7ef1 | 2009-08-17 00:13:31 +0000 | [diff] [blame] | 365 | case sparc_leon: |
| 366 | leon_init_IRQ(); |
| 367 | break; |
| 368 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | default: |
Simon Arlott | d1a78c3 | 2007-05-11 13:51:23 -0700 | [diff] [blame] | 370 | prom_printf("Cannot initialize IRQs on this Sun machine..."); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | break; |
| 372 | } |
| 373 | btfixup(); |
| 374 | } |
| 375 | |