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| |
| /** |
| * @file |
| * |
| * Defiens and functions for performing LMT operations, such as |
| * LMTST and LMTCANCEL |
| * |
| * @defgroup lmt Local Memory Transaction (LMT) support |
| * @{ |
| */ |
| #include "libbdk-arch/bdk-csrs-lmt.h" |
| |
| /** |
| * Address of the LMT store area in physical memory |
| */ |
| #define __BDK_LMTLINE_CN83XX 0x87F100000000ull |
| |
| /** |
| * Flush the LMTLINE area of all previous writes and clear the valid flag |
| */ |
| static inline void bdk_lmt_cancel(void) |
| { |
| if (CAVIUM_IS_MODEL(CAVIUM_CN83XX)) |
| *(volatile uint64_t *)(__BDK_LMTLINE_CN83XX | (1 << 10)) = 0; |
| else |
| BDK_CSR_WRITE(bdk_numa_local(), BDK_LMT_LF_LMTCANCEL, 0); |
| } |
| |
| /** |
| * Return a volatile pointer to the LMTLINE area in 64bit words. Good programming |
| * practice would to always store sequencially, incrementing the pointer for each |
| * word written. |
| * |
| * @return Voltaile uint64_t pointer to LMTLINE |
| */ |
| static inline volatile uint64_t *bdk_lmt_store_ptr(void) |
| { |
| if (CAVIUM_IS_MODEL(CAVIUM_CN83XX)) |
| return (volatile uint64_t *)__BDK_LMTLINE_CN83XX; |
| else |
| return (volatile uint64_t *)BDK_LMT_LF_LMTLINEX(0); |
| } |
| |
| /** |
| * Send the data stored to LMTLINE to an IO block. This call may |
| * fail if the hardware has invalidated the LMTLINE area. If it |
| * fails, you must issue all LMT stores again and redo this |
| * call. Note the return status of this function is backwards |
| * to most BDK functions. It matches the LMTST hardware result. |
| * |
| * @param io_address 48 bit IO address where the LMTLINE data will be sent |
| * |
| * @return Zero on failure, non-zero on success |
| */ |
| static inline int bdk_lmt_submit(uint64_t io_address) |
| { |
| int64_t result = 0; |
| asm volatile ("LDEOR xzr,%x[rf],[%[rs]]" : [rf] "=r"(result): [rs] "r"(io_address)); |
| return bdk_le64_to_cpu(result); |
| } |
| |
| /** @} */ |