1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 | /* * interface to Blackfin CEC * * Copyright 2009 Analog Devices Inc. * Licensed under the GPL-2 or later. */ #ifndef __ASM_BFIN_IRQFLAGS_H__ #define __ASM_BFIN_IRQFLAGS_H__ #include <mach/blackfin.h> #ifdef [31mCONFIG_SMP[0m # include <asm/pda.h> # include <asm/processor.h> # define bfin_irq_flags cpu_pda[blackfin_core_id()].imask #else extern unsigned long bfin_irq_flags; #endif static inline notrace void bfin_sti(unsigned long flags) { asm volatile("sti %0;" : : "d" (flags)); } static inline notrace unsigned long bfin_cli(void) { unsigned long flags; asm volatile("cli %0;" : "=d" (flags)); return flags; } #ifdef [31mCONFIG_DEBUG_HWERR[0m # define bfin_no_irqs 0x3f #else # define bfin_no_irqs 0x1f #endif /*****************************************************************************/ /* * Hard, untraced CPU interrupt flag manipulation and access. */ static inline notrace void __hard_local_irq_disable(void) { bfin_cli(); } static inline notrace void __hard_local_irq_enable(void) { bfin_sti(bfin_irq_flags); } static inline notrace unsigned long hard_local_save_flags(void) { return bfin_read_IMASK(); } static inline notrace unsigned long __hard_local_irq_save(void) { unsigned long flags; flags = bfin_cli(); #ifdef [31mCONFIG_DEBUG_HWERR[0m bfin_sti(0x3f); #endif return flags; } static inline notrace int hard_irqs_disabled_flags(unsigned long flags) { #ifdef [31mCONFIG_BF60x[0m return (flags & IMASK_IVG11) == 0; #else return (flags & ~0x3f) == 0; #endif } static inline notrace int hard_irqs_disabled(void) { unsigned long flags = hard_local_save_flags(); return hard_irqs_disabled_flags(flags); } static inline notrace void __hard_local_irq_restore(unsigned long flags) { if (!hard_irqs_disabled_flags(flags)) __hard_local_irq_enable(); } /*****************************************************************************/ /* * Interrupt pipe handling. */ #ifdef CONFIG_IPIPE #include <linux/compiler.h> #include <linux/ipipe_trace.h> /* * Way too many inter-deps between low-level headers in this port, so * we redeclare the required bits we cannot pick from * <asm/ipipe_base.h> to prevent circular dependencies. */ void __ipipe_stall_root(void); void __ipipe_unstall_root(void); unsigned long __ipipe_test_root(void); unsigned long __ipipe_test_and_stall_root(void); void __ipipe_restore_root(unsigned long flags); #ifdef CONFIG_IPIPE_DEBUG_CONTEXT struct ipipe_domain; extern struct ipipe_domain ipipe_root; void ipipe_check_context(struct ipipe_domain *ipd); #define __check_irqop_context(ipd) ipipe_check_context(&ipipe_root) #else /* !CONFIG_IPIPE_DEBUG_CONTEXT */ #define __check_irqop_context(ipd) do { } while (0) #endif /* !CONFIG_IPIPE_DEBUG_CONTEXT */ /* * Interrupt pipe interface to linux/irqflags.h. */ static inline notrace void arch_local_irq_disable(void) { __check_irqop_context(); __ipipe_stall_root(); barrier(); } static inline notrace void arch_local_irq_enable(void) { barrier(); __check_irqop_context(); __ipipe_unstall_root(); } static inline notrace unsigned long arch_local_save_flags(void) { return __ipipe_test_root() ? bfin_no_irqs : bfin_irq_flags; } static inline notrace int arch_irqs_disabled_flags(unsigned long flags) { return flags == bfin_no_irqs; } static inline notrace unsigned long arch_local_irq_save(void) { unsigned long flags; __check_irqop_context(); flags = __ipipe_test_and_stall_root() ? bfin_no_irqs : bfin_irq_flags; barrier(); return flags; } static inline notrace void arch_local_irq_restore(unsigned long flags) { __check_irqop_context(); __ipipe_restore_root(flags == bfin_no_irqs); } static inline notrace unsigned long arch_mangle_irq_bits(int virt, unsigned long real) { /* * Merge virtual and real interrupt mask bits into a single * 32bit word. */ return (real & ~(1 << 31)) | ((virt != 0) << 31); } static inline notrace int arch_demangle_irq_bits(unsigned long *x) { int virt = (*x & (1 << 31)) != 0; *x &= ~(1L << 31); return virt; } /* * Interface to various arch routines that may be traced. */ #ifdef CONFIG_IPIPE_TRACE_IRQSOFF static inline notrace void hard_local_irq_disable(void) { if (!hard_irqs_disabled()) { __hard_local_irq_disable(); ipipe_trace_begin(0x80000000); } } static inline notrace void hard_local_irq_enable(void) { if (hard_irqs_disabled()) { ipipe_trace_end(0x80000000); __hard_local_irq_enable(); } } static inline notrace unsigned long hard_local_irq_save(void) { unsigned long flags = hard_local_save_flags(); if (!hard_irqs_disabled_flags(flags)) { __hard_local_irq_disable(); ipipe_trace_begin(0x80000001); } return flags; } static inline notrace void hard_local_irq_restore(unsigned long flags) { if (!hard_irqs_disabled_flags(flags)) { ipipe_trace_end(0x80000001); __hard_local_irq_enable(); } } #else /* !CONFIG_IPIPE_TRACE_IRQSOFF */ # define hard_local_irq_disable() __hard_local_irq_disable() # define hard_local_irq_enable() __hard_local_irq_enable() # define hard_local_irq_save() __hard_local_irq_save() # define hard_local_irq_restore(flags) __hard_local_irq_restore(flags) #endif /* !CONFIG_IPIPE_TRACE_IRQSOFF */ #define hard_local_irq_save_cond() hard_local_irq_save() #define hard_local_irq_restore_cond(flags) hard_local_irq_restore(flags) #else /* !CONFIG_IPIPE */ /* * Direct interface to linux/irqflags.h. */ #define arch_local_save_flags() hard_local_save_flags() #define arch_local_irq_save() __hard_local_irq_save() #define arch_local_irq_restore(flags) __hard_local_irq_restore(flags) #define arch_local_irq_enable() __hard_local_irq_enable() #define arch_local_irq_disable() __hard_local_irq_disable() #define arch_irqs_disabled_flags(flags) hard_irqs_disabled_flags(flags) #define arch_irqs_disabled() hard_irqs_disabled() /* * Interface to various arch routines that may be traced. */ #define hard_local_irq_save() __hard_local_irq_save() #define hard_local_irq_restore(flags) __hard_local_irq_restore(flags) #define hard_local_irq_enable() __hard_local_irq_enable() #define hard_local_irq_disable() __hard_local_irq_disable() #define hard_local_irq_save_cond() hard_local_save_flags() #define hard_local_irq_restore_cond(flags) do { (void)(flags); } while (0) #endif /* !CONFIG_IPIPE */ #ifdef [31mCONFIG_SMP[0m #define hard_local_irq_save_smp() hard_local_irq_save() #define hard_local_irq_restore_smp(flags) hard_local_irq_restore(flags) #else #define hard_local_irq_save_smp() hard_local_save_flags() #define hard_local_irq_restore_smp(flags) do { (void)(flags); } while (0) #endif /* * Remap the arch-neutral IRQ state manipulation macros to the * blackfin-specific hard_local_irq_* API. */ #define local_irq_save_hw(flags) \ do { \ (flags) = hard_local_irq_save(); \ } while (0) #define local_irq_restore_hw(flags) \ do { \ hard_local_irq_restore(flags); \ } while (0) #define local_irq_disable_hw() \ do { \ hard_local_irq_disable(); \ } while (0) #define local_irq_enable_hw() \ do { \ hard_local_irq_enable(); \ } while (0) #define local_irq_save_hw_notrace(flags) \ do { \ (flags) = __hard_local_irq_save(); \ } while (0) #define local_irq_restore_hw_notrace(flags) \ do { \ __hard_local_irq_restore(flags); \ } while (0) #define irqs_disabled_hw() hard_irqs_disabled() #endif |