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46 * Implementiation of a PL011 UART
49 #ifndef __DEV_ARM_PL011_H__
50 #define __DEV_ARM_PL011_H__
52 #include "dev/arm/amba_device.hh"
53 #include "dev/uart.hh"
58 class Pl011 : public Uart, public AmbaDevice
61 Pl011(const Pl011Params *p);
63 void serialize(CheckpointOut &cp) const override;
64 void unserialize(CheckpointIn &cp) override;
67 Tick read(PacketPtr pkt) override;
68 Tick write(PacketPtr pkt) override;
71 void dataAvailable() override;
74 protected: // Interrupt handling
75 /** Function to generate interrupt */
76 void generateInterrupt();
79 * Assign new interrupt values and update interrupt signals
81 * A new interrupt is scheduled signalled if the set of unmasked
82 * interrupts goes empty to non-empty. Conversely, if the set of
83 * unmasked interrupts goes from non-empty to empty, the interrupt
86 * @param ints New <i>raw</i> interrupt status
87 * @param mask New interrupt mask
89 void setInterrupts(uint16_t ints, uint16_t mask);
91 * Convenience function to update the interrupt mask
94 * @param mask New interrupt mask
96 void setInterruptMask(uint16_t mask) { setInterrupts(rawInt, mask); }
98 * Convenience function to raise a new interrupt
101 * @param ints Set of interrupts to raise
103 void raiseInterrupts(uint16_t ints) { setInterrupts(rawInt | ints, imsc); }
105 * Convenience function to clear interrupts
108 * @param ints Set of interrupts to clear
110 void clearInterrupts(uint16_t ints) { setInterrupts(rawInt & ~ints, imsc); }
112 /** Masked interrupt status register */
113 inline uint16_t maskInt() const { return rawInt & imsc; }
115 /** Wrapper to create an event out of the thing */
116 EventWrapper<Pl011, &Pl011::generateInterrupt> intEvent;
118 protected: // Registers
119 static const uint64_t AMBA_ID = ULL(0xb105f00d00341011);
120 static const int UART_DR = 0x000;
121 static const int UART_FR = 0x018;
122 static const int UART_FR_CTS = 0x001;
123 static const int UART_FR_TXFE = 0x080;
124 static const int UART_FR_RXFE = 0x010;
125 static const int UART_IBRD = 0x024;
126 static const int UART_FBRD = 0x028;
127 static const int UART_LCRH = 0x02C;
128 static const int UART_CR = 0x030;
129 static const int UART_IFLS = 0x034;
130 static const int UART_IMSC = 0x038;
131 static const int UART_RIS = 0x03C;
132 static const int UART_MIS = 0x040;
133 static const int UART_ICR = 0x044;
135 static const uint16_t UART_RIINTR = 1 << 0;
136 static const uint16_t UART_CTSINTR = 1 << 1;
137 static const uint16_t UART_CDCINTR = 1 << 2;
138 static const uint16_t UART_DSRINTR = 1 << 3;
139 static const uint16_t UART_RXINTR = 1 << 4;
140 static const uint16_t UART_TXINTR = 1 << 5;
141 static const uint16_t UART_RTINTR = 1 << 6;
142 static const uint16_t UART_FEINTR = 1 << 7;
143 static const uint16_t UART_PEINTR = 1 << 8;
144 static const uint16_t UART_BEINTR = 1 << 9;
145 static const uint16_t UART_OEINTR = 1 << 10;
149 /** fractional baud rate divisor. Not used for anything but reporting
153 /** integer baud rate divisor. Not used for anything but reporting
157 /** Line control register. Not used for anything but reporting
161 /** interrupt fifo level register. Not used for anything but reporting
165 /** interrupt mask register. */
168 /** raw interrupt status register */
171 protected: // Configuration
172 /** Gic to use for interrupting */
175 /** Should the simulation end on an EOT */
178 /** Interrupt number to generate */
181 /** Delay before interrupting */
185 #endif //__DEV_ARM_PL011_H__