/* * "magic" Event State Buffer (ESB) MMIO offsets. * * Each interrupt source has a 2-bit state machine called ESB * which can be controlled by MMIO. It's made of 2 bits, P and * Q. P indicates that an interrupt is pending (has been sent * to a queue and is waiting for an EOI). Q indicates that the * interrupt has been triggered while pending. * * This acts as a coalescing mechanism in order to guarantee * that a given interrupt only occurs at most once in a queue. * * When doing an EOI, the Q bit will indicate if the interrupt * needs to be re-triggered. * * The following offsets into the ESB MMIO allow to read or * manipulate the PQ bits. They must be used with an 8-bytes * load instruction. They all return the previous state of the * interrupt (atomically). * * Additionally, some ESB pages support doing an EOI via a * store at 0 and some ESBs support doing a trigger via a * separate trigger page.
*/ #define XIVE_ESB_STORE_EOI 0x400 /* Store */ #define XIVE_ESB_LOAD_EOI 0x000 /* Load */ #define XIVE_ESB_GET 0x800 /* Load */ #define XIVE_ESB_SET_PQ_00 0xc00 /* Load */ #define XIVE_ESB_SET_PQ_01 0xd00 /* Load */ #define XIVE_ESB_SET_PQ_10 0xe00 /* Load */ #define XIVE_ESB_SET_PQ_11 0xf00 /* Load */
/* * Load-after-store ordering * * Adding this offset to the load address will enforce * load-after-store ordering. This is required to use StoreEOI.
*/ #define XIVE_ESB_LD_ST_MO 0x40 /* Load-after-store ordering */
/* * QW word 2 contains the valid bit at the top and other fields * depending on the QW.
*/ #define TM_WORD2 0x8 #define TM_QW0W2_VU PPC_BIT32(0) #define TM_QW0W2_LOGIC_SERV PPC_BITMASK32(1,31) // XX 2,31 ? #define TM_QW1W2_VO PPC_BIT32(0) #define TM_QW1W2_HO PPC_BIT32(1) /* P10 XIVE2 */ #define TM_QW1W2_OS_CAM PPC_BITMASK32(8,31) #define TM_QW2W2_VP PPC_BIT32(0) #define TM_QW2W2_HP PPC_BIT32(1) /* P10 XIVE2 */ #define TM_QW2W2_POOL_CAM PPC_BITMASK32(8,31) #define TM_QW3W2_VT PPC_BIT32(0) #define TM_QW3W2_HT PPC_BIT32(1) /* P10 XIVE2 */ #define TM_QW3W2_LP PPC_BIT32(6) #define TM_QW3W2_LE PPC_BIT32(7) #define TM_QW3W2_T PPC_BIT32(31)
/* * In addition to normal loads to "peek" and writes (only when invalid) * using 4 and 8 bytes accesses, the above registers support these * "special" byte operations: * * - Byte load from QW0[NSR] - User level NSR (EBB) * - Byte store to QW0[NSR] - User level NSR (EBB) * - Byte load/store to QW1[CPPR] and QW3[CPPR] - CPPR access * - Byte load from QW3[TM_WORD2] - Read VT||00000||LP||LE on thrd 0 * otherwise VT||0000000 * - Byte store to QW3[TM_WORD2] - Set VT bit (and LP/LE if present) * * Then we have all these "special" CI ops at these offset that trigger * all sorts of side effects:
*/ #define TM_SPC_ACK_EBB 0x800 /* Load8 ack EBB to reg*/ #define TM_SPC_ACK_OS_REG 0x810 /* Load16 ack OS irq to reg */ #define TM_SPC_PUSH_USR_CTX 0x808 /* Store32 Push/Validate user context */ #define TM_SPC_PULL_USR_CTX 0x808 /* Load32 Pull/Invalidate user context */ #define TM_SPC_SET_OS_PENDING 0x812 /* Store8 Set OS irq pending bit */ #define TM_SPC_PULL_OS_CTX 0x818 /* Load32/Load64 Pull/Invalidate OS context to reg */ #define TM_SPC_PULL_POOL_CTX 0x828 /* Load32/Load64 Pull/Invalidate Pool context to reg*/ #define TM_SPC_ACK_HV_REG 0x830 /* Load16 ack HV irq to reg */ #define TM_SPC_PULL_USR_CTX_OL 0xc08 /* Store8 Pull/Inval usr ctx to odd line */ #define TM_SPC_ACK_OS_EL 0xc10 /* Store8 ack OS irq to even line */ #define TM_SPC_ACK_HV_POOL_EL 0xc20 /* Store8 ack HV evt pool to even line */ #define TM_SPC_ACK_HV_EL 0xc30 /* Store8 ack HV irq to even line */ /* XXX more... */
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