PCH_R_BAR_HD0
pchsmbus_write8(pch, PCH_R_BAR_HD0, req->smbr_wlen);
uint8_t len = pchsmbus_read8(pch, PCH_R_BAR_HD0);
pch->ps_req->smbr_rdata[0] = pchsmbus_read8(pch, PCH_R_BAR_HD0);
pch->ps_req->smbr_rdata[0] = pchsmbus_read8(pch, PCH_R_BAR_HD0);
len = pchsmbus_read8(pch, PCH_R_BAR_HD0);
pchsmbus_write8(pch, PCH_R_BAR_HD0, req->smbr_wdata[0]);
pchsmbus_write8(pch, PCH_R_BAR_HD0, req->smbr_wdata[0]);