diff options
Diffstat (limited to 'src/include/kernel')
| -rw-r--r-- | src/include/kernel/intmsghandler.H | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/src/include/kernel/intmsghandler.H b/src/include/kernel/intmsghandler.H index 52eadde27..500961668 100644 --- a/src/include/kernel/intmsghandler.H +++ b/src/include/kernel/intmsghandler.H @@ -27,6 +27,7 @@ #include <kernel/types.h> #include <kernel/msghandler.H> #include <kernel/msg.H> +#include <builtins.h> /** * @class InterruptMsgHdlr @@ -41,6 +42,31 @@ class InterruptMsgHdlr : public MessageHandler { public: + /** + * Field values for P8 + * @note This is used to calculate the mmio address offset + * from the PIR for the interrupt presenter memory mapped registers. + * The masks isolate the node,chip,core, and thread id fields in the + * PIR. The LSL values tell how far left a PIR field needs to be + * shifted to create a proper mmio offset address. + * + */ + enum + { + P8_PIR_THREADID_MSK = 0x00000007, + P8_PIR_COREID_MSK = 0x00000078, + P8_PIR_CHIPID_MSK = 0x00000380, + P8_PIR_NODEID_MSK = 0x00001C00, + + // Logical Shift Left fields for mmio Base address from PIR. + // (IP addr bit pos - PIR bit pos) + P8_IP_THREADID_LSL = (12-0), + P8_IP_COREID_LSL = (15-3), + P8_IP_CHIPID_LSL = (20-7), + P8_IP_NODEID_LSL = (23-10), + XIRR_ADDR_OFFSET = 4, + }; + // Notes: // All external interrupts are routed to one cpu core // External Interrupts are only processed one at a time @@ -71,6 +97,26 @@ class InterruptMsgHdlr : public MessageHandler task_t* i_task,int i_rc); + ALWAYS_INLINE + static uint64_t mmio_offset(uint64_t i_pir) + { + uint64_t offset = 0; + + // The node and chip id fields are adjacent in both the PIR and + // the mmio offset - so they can be done in one shift operation + offset |= + (i_pir & (P8_PIR_NODEID_MSK | P8_PIR_CHIPID_MSK)) + << P8_IP_CHIPID_LSL; + + // The core and thread id field are adjacent in both the PIR and + // the mmio offset, so they can be done in one shift operation. + offset |= + (i_pir & (P8_PIR_COREID_MSK | P8_PIR_THREADID_MSK)) + << P8_IP_THREADID_LSL; + + return offset; + } + /** * Create the InterruptMsgHdlr to handle external interrupts * @param[in] i_msgQ The message queue |
