diff options
| author | Aaron Durbin <adurbin@chromium.org> | 2013-09-23 14:17:35 -0500 |
|---|---|---|
| committer | Aaron Durbin <adurbin@google.com> | 2014-01-31 20:42:28 +0100 |
| commit | 4c53df47302968fd6f90261d84c9d3c0f8e7bbc2 (patch) | |
| tree | 50500c5e0f653c6358e8334568684bfb7dded1ee /src/soc/intel/baytrail/iosf.c | |
| parent | 191570ded853521ed2e54414ba33074ba7909a7d (diff) | |
baytrail: add dunit access and registers
The dunit on baytrail is the dram unit. Provide a means
to access the configuration registers there using the
proper IOSF mechanisms.
BUG=chrome-os-partner:22875
BRANCH=none
TEST=Built and booted. Able to read dram registers.
Change-Id: I4d5c019720a7883fe93f3e1860bcd57ce2ea6542
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/170490
Reviewed-on: http://review.coreboot.org/4853
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Diffstat (limited to 'src/soc/intel/baytrail/iosf.c')
| -rw-r--r-- | src/soc/intel/baytrail/iosf.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/src/soc/intel/baytrail/iosf.c b/src/soc/intel/baytrail/iosf.c index 6d4cba9bb6..2373d81598 100644 --- a/src/soc/intel/baytrail/iosf.c +++ b/src/soc/intel/baytrail/iosf.c @@ -59,3 +59,24 @@ void iosf_bunit_write(int reg, uint32_t val) write_iosf_reg(MCR_REG, cr); write_iosf_reg(MDR_REG, val); } + +uint32_t iosf_dunit_read(int reg) +{ + uint32_t cr = IOSF_OPCODE(IOSF_OP_READ_SYSMEMC) | + IOSF_PORT(IOSF_PORT_SYSMEMC) | IOSF_REG(reg) | + IOSF_BYTE_EN; + + write_iosf_reg(MCR_REG, cr); + return read_iosf_reg(MDR_REG); +} + +void iosf_dunit_write(int reg, uint32_t val) +{ + uint32_t cr = IOSF_OPCODE(IOSF_OP_WRITE_SYSMEMC) | + IOSF_PORT(IOSF_PORT_SYSMEMC) | IOSF_REG(reg) | + IOSF_BYTE_EN; + + + write_iosf_reg(MCR_REG, cr); + write_iosf_reg(MDR_REG, val); +} |