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45 * Implementation of a PL390 GIC
48 #ifndef __DEV_ARM_GIC_PL390_H__
49 #define __DEV_ARM_GIC_PL390_H__
53 #include "base/addr_range.hh"
54 #include "base/bitunion.hh"
55 #include "cpu/intr_control.hh"
56 #include "dev/arm/base_gic.hh"
57 #include "dev/io_device.hh"
58 #include "dev/platform.hh"
59 #include "params/Pl390.hh"
61 class Pl390 : public BaseGic
64 // distributor memory addresses
66 GICD_CTLR = 0x000, // control register
67 GICD_TYPER = 0x004, // controller type
68 GICD_IIDR = 0x008, // implementer id
69 GICD_SGIR = 0xf00, // software generated interrupt
74 static const AddrRange GICD_ISENABLER; // interrupt set enable
75 static const AddrRange GICD_ICENABLER; // interrupt clear enable
76 static const AddrRange GICD_ISPENDR; // set pending interrupt
77 static const AddrRange GICD_ICPENDR; // clear pending interrupt
78 static const AddrRange GICD_ISACTIVER; // active bit registers
79 static const AddrRange GICD_ICACTIVER; // clear bit registers
80 static const AddrRange GICD_IPRIORITYR; // interrupt priority registers
81 static const AddrRange GICD_ITARGETSR; // processor target registers
82 static const AddrRange GICD_ICFGR; // interrupt config registers
84 // cpu memory addresses
86 GICC_CTLR = 0x00, // CPU control register
87 GICC_PMR = 0x04, // Interrupt priority mask
88 GICC_BPR = 0x08, // binary point register
89 GICC_IAR = 0x0C, // interrupt ack register
90 GICC_EOIR = 0x10, // end of interrupt
91 GICC_RPR = 0x14, // running priority
92 GICC_HPPIR = 0x18, // highest pending interrupt
93 GICC_ABPR = 0x1c, // aliased binary point
94 GICC_IIDR = 0xfc, // cpu interface id register
99 static const int SGI_MAX = 16; // Number of Software Gen Interrupts
100 static const int PPI_MAX = 16; // Number of Private Peripheral Interrupts
102 /** Mask off SGI's when setting/clearing pending bits */
103 static const int SGI_MASK = 0xFFFF0000;
105 /** Mask for bits that config N:N mode in GICD_ICFGR's */
106 static const int NN_CONFIG_MASK = 0x55555555;
108 static const int CPU_MAX = 256; // Max number of supported CPU interfaces
109 static const int SPURIOUS_INT = 1023;
110 static const int INT_BITS_MAX = 32;
111 static const int INT_LINES_MAX = 1020;
112 static const int GLOBAL_INT_LINES = INT_LINES_MAX - SGI_MAX - PPI_MAX;
115 Bitfield<3,0> sgi_id;
116 Bitfield<23,16> cpu_list;
117 Bitfield<25,24> list_type;
121 Bitfield<9,0> ack_id;
122 Bitfield<12,10> cpu_id;
125 protected: /* Params */
126 /** Address range for the distributor interface */
127 const AddrRange distRange;
129 /** Address range for the CPU interfaces */
130 const AddrRange cpuRange;
132 /** All address ranges used by this GIC */
133 const AddrRangeList addrRanges;
135 /** Latency for a distributor operation */
136 const Tick distPioDelay;
138 /** Latency for a cpu operation */
139 const Tick cpuPioDelay;
141 /** Latency for a interrupt to get to CPU */
142 const Tick intLatency;
148 /** Are gem5 extensions available? */
149 const bool haveGem5Extensions;
151 /** gem5 many-core extension enabled by driver */
152 bool gem5ExtensionsEnabled;
154 /** Number of itLines enabled */
157 /** Registers "banked for each connected processor" per ARM IHI0048B */
158 struct BankedRegs : public Serializable {
159 /** GICD_I{S,C}ENABLER0
160 * interrupt enable bits for first 32 interrupts, 1b per interrupt */
163 /** GICD_I{S,C}PENDR0
164 * interrupt pending bits for first 32 interrupts, 1b per interrupt */
167 /** GICD_I{S,C}ACTIVER0
168 * interrupt active bits for first 32 interrupts, 1b per interrupt */
171 /** GICD_IPRIORITYR{0..7}
172 * interrupt priority for SGIs and PPIs */
173 uint8_t intPriority[SGI_MAX + PPI_MAX];
175 /** GICD_ITARGETSR{0..7}
176 * 8b CPU target ID for each SGI and PPI */
177 uint8_t cpuTarget[SGI_MAX + PPI_MAX];
179 void serialize(CheckpointOut &cp) const override;
180 void unserialize(CheckpointIn &cp) override;
183 intEnabled(0), pendingInt(0), activeInt(0),
184 intPriority {0}, cpuTarget {0}
187 std::vector<BankedRegs*> bankedRegs;
189 BankedRegs& getBankedRegs(ContextID);
191 /** GICD_I{S,C}ENABLER{1..31}
192 * interrupt enable bits for global interrupts
193 * 1b per interrupt, 32 bits per word, 31 words */
194 uint32_t intEnabled[INT_BITS_MAX-1];
196 uint32_t& getIntEnabled(ContextID ctx, uint32_t ix) {
198 return getBankedRegs(ctx).intEnabled;
200 return intEnabled[ix - 1];
204 /** GICD_I{S,C}PENDR{1..31}
205 * interrupt pending bits for global interrupts
206 * 1b per interrupt, 32 bits per word, 31 words */
207 uint32_t pendingInt[INT_BITS_MAX-1];
209 uint32_t& getPendingInt(ContextID ctx, uint32_t ix) {
210 assert(ix < INT_BITS_MAX);
212 return getBankedRegs(ctx).pendingInt;
214 return pendingInt[ix - 1];
218 /** GICD_I{S,C}ACTIVER{1..31}
219 * interrupt active bits for global interrupts
220 * 1b per interrupt, 32 bits per word, 31 words */
221 uint32_t activeInt[INT_BITS_MAX-1];
223 uint32_t& getActiveInt(ContextID ctx, uint32_t ix) {
224 assert(ix < INT_BITS_MAX);
226 return getBankedRegs(ctx).activeInt;
228 return activeInt[ix - 1];
232 /** read only running priority register, 1 per cpu*/
233 uint32_t iccrpr[CPU_MAX];
235 /** GICD_IPRIORITYR{8..255}
236 * an 8 bit priority (lower is higher priority) for each
237 * of the global (not replicated per CPU) interrupts.
239 uint8_t intPriority[GLOBAL_INT_LINES];
241 uint8_t& getIntPriority(ContextID ctx, uint32_t ix) {
242 assert(ix < INT_LINES_MAX);
243 if (ix < SGI_MAX + PPI_MAX) {
244 return getBankedRegs(ctx).intPriority[ix];
246 return intPriority[ix - (SGI_MAX + PPI_MAX)];
250 /** GICD_ITARGETSR{8..255}
251 * an 8 bit cpu target id for each global interrupt.
253 uint8_t cpuTarget[GLOBAL_INT_LINES];
255 uint8_t& getCpuTarget(ContextID ctx, uint32_t ix) {
256 assert(ix < INT_LINES_MAX);
257 if (ix < SGI_MAX + PPI_MAX) {
258 return getBankedRegs(ctx).cpuTarget[ix];
260 return cpuTarget[ix - (SGI_MAX + PPI_MAX)];
264 /** 2 bit per interrupt signaling if it's level or edge sensitive
265 * and if it is 1:N or N:N */
266 uint32_t intConfig[INT_BITS_MAX*2];
269 bool cpuEnabled[CPU_MAX];
272 uint8_t cpuPriority[CPU_MAX];
274 /** Binary point registers */
275 uint8_t cpuBpr[CPU_MAX];
277 /** highest interrupt that is interrupting CPU */
278 uint32_t cpuHighestInt[CPU_MAX];
280 /** One bit per cpu per software interrupt that is pending for each possible
281 * sgi source. Indexed by SGI number. Each byte in generating cpu id and
282 * bits in position is destination id. e.g. 0x4 = CPU 0 generated interrupt
284 uint64_t cpuSgiPending[SGI_MAX];
285 uint64_t cpuSgiActive[SGI_MAX];
287 /** SGI pending arrays for gem5 GIC extension mode, which instead keeps
288 * 16 SGI pending bits for each of the (large number of) CPUs.
290 uint32_t cpuSgiPendingExt[CPU_MAX];
291 uint32_t cpuSgiActiveExt[CPU_MAX];
293 /** One bit per private peripheral interrupt. Only upper 16 bits
294 * will be used since PPI interrupts are numberred from 16 to 32 */
295 uint32_t cpuPpiPending[CPU_MAX];
296 uint32_t cpuPpiActive[CPU_MAX];
298 /** IRQ Enable Used for debug */
301 /** software generated interrupt
302 * @param data data to decode that indicates which cpus to interrupt
304 void softInt(ContextID ctx, SWI swi);
306 /** See if some processor interrupt flags need to be enabled/disabled
307 * @param hint which set of interrupts needs to be checked
309 void updateIntState(int hint);
311 /** Update the register that records priority of the highest priority
315 /** generate a bit mask to check cpuSgi for an interrupt. */
316 uint64_t genSwiMask(int cpu);
318 int intNumToWord(int num) const { return num >> 5; }
319 int intNumToBit(int num) const { return num % 32; }
322 * Post an interrupt to a CPU with a delay
324 void postInt(uint32_t cpu, Tick when);
327 * Deliver a delayed interrupt to the target CPU
329 void postDelayedInt(uint32_t cpu);
331 /** Event definition to post interrupt to CPU after a delay
333 class PostIntEvent : public Event
339 PostIntEvent(Pl390 &_parent, uint32_t _cpu)
340 : parent(_parent), cpu(_cpu)
342 void process() { parent.postDelayedInt(cpu); }
343 const char *description() const { return "Post Interrupt to CPU"; }
345 PostIntEvent *postIntEvent[CPU_MAX];
346 int pendingDelayedInterrupts;
349 typedef Pl390Params Params;
353 return dynamic_cast<const Params *>(_params);
355 Pl390(const Params *p);
357 DrainState drain() override;
359 void serialize(CheckpointOut &cp) const override;
360 void unserialize(CheckpointIn &cp) override;
362 public: /* PioDevice */
363 AddrRangeList getAddrRanges() const override { return addrRanges; }
365 /** A PIO read to the device, immediately split up into
366 * readDistributor() or readCpu()
368 Tick read(PacketPtr pkt) override;
370 /** A PIO read to the device, immediately split up into
371 * writeDistributor() or writeCpu()
373 Tick write(PacketPtr pkt) override;
375 public: /* BaseGic */
376 void sendInt(uint32_t number) override;
377 void clearInt(uint32_t number) override;
379 void sendPPInt(uint32_t num, uint32_t cpu) override;
380 void clearPPInt(uint32_t num, uint32_t cpu) override;
382 public: // Test & debug intefaces
384 /* Various functions fer testing and debugging */
385 void driveSPI(uint32_t spi);
386 void driveLegIRQ(bool state);
387 void driveLegFIQ(bool state);
388 void driveIrqEn(bool state);
392 /** Handle a read to the distributor portion of the GIC
393 * @param pkt packet to respond to
395 Tick readDistributor(PacketPtr pkt);
396 uint32_t readDistributor(ContextID ctx, Addr daddr, size_t resp_sz);
398 /** Handle a read to the cpu portion of the GIC
399 * @param pkt packet to respond to
401 Tick readCpu(PacketPtr pkt);
402 uint32_t readCpu(ContextID ctx, Addr daddr);
404 /** Handle a write to the distributor portion of the GIC
405 * @param pkt packet to respond to
407 Tick writeDistributor(PacketPtr pkt);
408 void writeDistributor(ContextID ctx, Addr daddr, uint32_t data,
411 /** Handle a write to the cpu portion of the GIC
412 * @param pkt packet to respond to
414 Tick writeCpu(PacketPtr pkt);
415 void writeCpu(ContextID ctx, Addr daddr, uint32_t data);
418 #endif //__DEV_ARM_GIC_H__