Murulidhar Nataraju | 207bed4 | 2017-03-31 07:38:55 -0500 | [diff] [blame] | 1 | #include <iostream> |
| 2 | #include <stdexcept> |
| 3 | #include <array> |
| 4 | #include "sbe_interfaces.hpp" |
| 5 | |
| 6 | namespace openpower |
| 7 | { |
| 8 | namespace sbe |
| 9 | { |
| 10 | |
| 11 | //Helper interfaces |
| 12 | static inline uint32_t upper(uint64_t value) |
| 13 | { |
| 14 | return ((value & 0xFFFFFFFF00000000ull) >> 32); |
| 15 | } |
| 16 | |
| 17 | static inline uint32_t lower(uint64_t value) |
| 18 | { |
| 19 | return (value & 0xFFFFFFFF); |
| 20 | } |
| 21 | |
| 22 | using sbe_word_t = uint32_t; |
| 23 | |
| 24 | namespace scom |
| 25 | { |
| 26 | |
| 27 | //Constants specific to SCOM operations |
| 28 | static constexpr sbe_word_t READ_OPCODE = 0x0000A201; |
| 29 | static constexpr sbe_word_t WRITE_OPCODE = 0x0000A202; |
| 30 | static constexpr size_t READ_CMD_LENGTH = 0x4; |
| 31 | static constexpr size_t WRITE_CMD_LENGTH = 0x6; |
| 32 | |
| 33 | //Reading SCOM Registers |
| 34 | uint64_t read(const char* devPath, |
| 35 | uint64_t address) |
| 36 | { |
| 37 | uint64_t value = 0; |
| 38 | |
| 39 | //Validate input device path |
| 40 | if (devPath == nullptr) |
| 41 | { |
| 42 | throw std::runtime_error("NULL FIFO device path"); |
| 43 | } |
| 44 | |
| 45 | //Build SCOM read request command |
| 46 | std::array<sbe_word_t, READ_CMD_LENGTH> command = |
| 47 | { |
| 48 | static_cast<sbe_word_t>(READ_CMD_LENGTH), |
| 49 | READ_OPCODE, |
| 50 | upper(address), |
| 51 | lower(address) |
| 52 | }; |
| 53 | |
| 54 | std::cout << "Size of read command buffer:" << command.size(); |
| 55 | |
| 56 | // TODO: Call an interface to read the command to the SBE FIFO and read the |
| 57 | // response from the SBE FIFO device |
| 58 | |
| 59 | return value; |
| 60 | } |
| 61 | |
| 62 | void write(const char* devPath, |
| 63 | uint64_t address, |
| 64 | uint64_t data) |
| 65 | { |
| 66 | //Validate input device path |
| 67 | if (devPath == nullptr) |
| 68 | { |
| 69 | throw std::runtime_error("NULL FIFO device path"); |
| 70 | } |
| 71 | |
| 72 | //Build SCOM write request command |
| 73 | std::array<sbe_word_t, WRITE_CMD_LENGTH> command = |
| 74 | { |
| 75 | static_cast<sbe_word_t>(WRITE_CMD_LENGTH), |
| 76 | WRITE_OPCODE, |
| 77 | upper(address), |
| 78 | lower(address), |
| 79 | upper(data), |
| 80 | lower(data) |
| 81 | }; |
| 82 | |
| 83 | std::cout << "Size of write command buffer:" << command.size(); |
| 84 | |
| 85 | // TODO: Call an interface to write the command to the SBE FIFO and read the |
| 86 | // response from the SBE FIFO device |
| 87 | |
| 88 | } |
| 89 | |
| 90 | } // namespace scom |
| 91 | } // namespace sbe |
| 92 | } // namespace openpower |