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Diffstat (limited to 'util/romcc/tests/simple_test10.c')
| -rw-r--r-- | util/romcc/tests/simple_test10.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/util/romcc/tests/simple_test10.c b/util/romcc/tests/simple_test10.c new file mode 100644 index 0000000000..3e7f510d67 --- /dev/null +++ b/util/romcc/tests/simple_test10.c @@ -0,0 +1,31 @@ +#define SMBUS_MEM_DEVICE_START 0x50 +#define SMBUS_MEM_DEVICE_END 0x53 +#define SMBUS_MEM_DEVICE_INC 1 + +static void spd_set_drb(void) +{ + /* + * Effects: Uses serial presence detect to set the + * DRB registers which holds the ending memory address assigned + * to each DIMM. + */ + unsigned end_of_memory; + unsigned char device; + + end_of_memory = 0; /* in multiples of 8MiB */ + device = SMBUS_MEM_DEVICE_START; + while (device <= SMBUS_MEM_DEVICE_END) { + unsigned side1_bits, side2_bits; + int byte, byte2; + + side1_bits = side2_bits = -1; + + /* Compute the end address for the DRB register */ + /* Only process dimms < 2GB (2^8 * 8MB) */ + if (side1_bits < 8) { + end_of_memory += (1 << side1_bits); + } + device += SMBUS_MEM_DEVICE_INC; + } +} + |