diff options
Diffstat (limited to 'src/include/arch/memorymap.H')
| -rw-r--r-- | src/include/arch/memorymap.H | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/src/include/arch/memorymap.H b/src/include/arch/memorymap.H index 7b75f6363..1ea479d8c 100644 --- a/src/include/arch/memorymap.H +++ b/src/include/arch/memorymap.H @@ -39,8 +39,13 @@ constexpr uint64_t MMIO_OFFSET_PER_CHIP = (4*TERABYTE); //0x40000000000 constexpr uint64_t MMIO_OFFSET_PER_GROUP = (32*TERABYTE); //0x200000000000 constexpr uint64_t MMIO_BASE = 0x6000000000000; + /** * @brief Compute MMIO value for a given chip and base value + * @param[in] i_baseAddr group0-chip0 address + * @param[in] i_group Fabric Group ID to compute address for + * @param[in] i_chip Fabric Chip ID to compute address for + * @return Fully qualified memory address */ inline uint64_t computeMemoryMapOffset( uint64_t i_baseAddr, uint8_t i_group, @@ -52,6 +57,26 @@ inline uint64_t computeMemoryMapOffset( uint64_t i_baseAddr, }; /** + * @brief Determine fabric id from a MMIO address + * @param[in] i_addr position-specific memory address + * @param[out] i_group Fabric Group ID to compute address for + * @param[out] i_chip Fabric Chip ID to compute address for + */ +inline void getFabricIdFromAddr( uint64_t i_addr, + uint8_t& o_group, + uint8_t& o_chip ) +{ + // chop off any high-order offset + uint64_t l_addr = i_addr % MMIO_BASE; + // use integer math to get the group id + o_group = l_addr / MMIO_OFFSET_PER_GROUP; + // chop off the group + l_addr = l_addr % MMIO_OFFSET_PER_GROUP; + // use integer math to get the chip id + o_chip = l_addr % MMIO_OFFSET_PER_CHIP; +}; + +/** * @brief A few default values that will need to be known * by low-level code */ |
