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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: chips/p9/procedures/hwp/memory/lib/mcbist/mcbist.C $ */
/* */
/* IBM CONFIDENTIAL */
/* */
/* EKB Project */
/* */
/* COPYRIGHT 2015,2016 */
/* [+] International Business Machines Corp. */
/* */
/* */
/* The source code for this program is not published or otherwise */
/* divested of its trade secrets, irrespective of what has been */
/* deposited with the U.S. Copyright Office. */
/* */
/* IBM_PROLOG_END_TAG */
///
/// @file mcbist.C
/// @brief Run and manage the MCBIST engine
///
// *HWP HWP Owner: Brian Silver <bsilver@us.ibm.com>
// *HWP HWP Backup: Craig Hamilton <cchamilt@us.ibm.com>
// *HWP Team: Memory
// *HWP Level: 2
// *HWP Consumed by: FSP:HB
#include <fapi2.H>
#include "mcbist.H"
#include "../utils/dump_regs.H"
using fapi2::TARGET_TYPE_MCBIST;
using fapi2::TARGET_TYPE_MCA;
namespace mss
{
namespace mcbist
{
///
/// @brief Load a set of MCBIST subtests in to the MCBIST registers
/// @tparam T, the fapi2::TargetType - derived
/// @tparam TT, the mcbistTraits associated with T - derived
/// @param[in] the target to effect
/// @param[in] the mcbist::program
/// @return FAPI2_RC_SUCCSS iff ok
/// @note assumes the MCBIST engine has been configured.
///
template<>
fapi2::ReturnCode load_mcbmr( const fapi2::Target<TARGET_TYPE_MCBIST>& i_target,
const mcbist::program<TARGET_TYPE_MCBIST>& i_program )
{
// Leave if there are no subtests.
if (0 == i_program.iv_subtests.size())
{
FAPI_DBG("no subtests, noting to do");
return fapi2::current_err;
}
// List of the 8 MCBIST registers - each holds 4 subtests.
static const std::vector< uint64_t > l_memory_registers =
{
MCBIST_MCBMR0Q, MCBIST_MCBMR1Q, MCBIST_MCBMR2Q, MCBIST_MCBMR3Q,
MCBIST_MCBMR4Q, MCBIST_MCBMR5Q, MCBIST_MCBMR6Q, MCBIST_MCBMR7Q,
};
std::vector< uint64_t > l_memory_register_buffers =
{
0, 0, 0, 0, 0, 0, 0, 0,
};
static const size_t SUBTEST_PER_REG = 4;
static const size_t SUBTEST_PER_PROGRAM = 32;
static const auto BITS_IN_SUBTEST = sizeof(mcbist::subtest_t<TARGET_TYPE_MCBIST>().iv_mcbmr) * 8;
static const auto LEFT_SHIFT = (sizeof(uint64_t) * 8) - BITS_IN_SUBTEST;
ssize_t l_bin = -1;
size_t l_register_shift = 0;
// We'll shift this in to position to indicate which subtest is the last
static const uint64_t l_done_bit( 0x8000000000000000 >> MCBIST_MCBMR0Q_MCBIST_CFG_TEST00_DONE );
// TK: For now limit MCBIST programs to 32 subtests.
const auto l_program_size = i_program.iv_subtests.size();
FAPI_ASSERT( l_program_size <= SUBTEST_PER_PROGRAM,
fapi2::MSS_MCBIST_PROGRAM_TOO_BIG().set_PROGRAM_LENGTH(l_program_size),
"mcbist program of length %d exceeds arbitrary maximum of %d", l_program_size, SUBTEST_PER_PROGRAM );
// Distribute the program over the 8 MCBIST subtest registers
// We need the index, so increment thru i_program.iv_subtests.size()
for (size_t l_index = 0; l_index < l_program_size; ++l_index)
{
l_bin = (l_index % SUBTEST_PER_REG) == 0 ? l_bin + 1 : l_bin;
l_register_shift = (l_index % SUBTEST_PER_REG) * BITS_IN_SUBTEST;
l_memory_register_buffers[l_bin] |=
(uint64_t(i_program.iv_subtests[l_index].iv_mcbmr) << LEFT_SHIFT) >> l_register_shift;
FAPI_DBG("putting subtest %d (0x%x) in MCBMR%dQ shifted %d 0x%016llx",
l_index, i_program.iv_subtests[l_index].iv_mcbmr, l_bin,
l_register_shift, l_memory_register_buffers[l_bin]);
}
// l_bin and l_register_shift are the values for the last subtest we'll tell the MCBIST about.
// We need to set that subtest's done-bit so the MCBIST knows it's the end of the line
l_memory_register_buffers[l_bin] |= l_done_bit >> l_register_shift;
FAPI_DBG("setting MCBMR%dQ subtest %llu as the last subtest 0x%016llx",
l_bin, l_register_shift, l_memory_register_buffers[l_bin]);
// ... and slam the values in to the registers.
// Could just decrement l_bin, but that scoms the subtests in backwards and is confusing
for (auto l_index = 0; l_index <= l_bin; ++l_index)
{
FAPI_TRY( mss::putScom(i_target, l_memory_registers[l_index], l_memory_register_buffers[l_index]) );
}
fapi_try_exit:
return fapi2::current_err;
}
///
/// @brief Execute the mcbist program
/// @param[in] i_target the target to effect
/// @param[in] i_program, the mcbist program to execute
/// @return fapi2::ReturnCode, FAPI2_RC_SUCCESS iff OK
///
template<>
fapi2::ReturnCode execute( const fapi2::Target<TARGET_TYPE_MCBIST>& i_target,
const program<TARGET_TYPE_MCBIST>& i_program )
{
typedef mcbistTraits<TARGET_TYPE_MCBIST> TT;
static const uint64_t l_done = fapi2::buffer<uint64_t>().setBit<TT::MCBIST_DONE>();
static const uint64_t l_fail = fapi2::buffer<uint64_t>().setBit<TT::MCBIST_FAIL>();
fapi2::buffer<uint64_t> l_status;
// Slam the subtests in to the mcbist registers
FAPI_TRY( load_mcbmr(i_target, i_program) );
// Slam the parameters in to the mcbist parameter register
FAPI_TRY( load_mcbparm(i_target, i_program) );
// Slam the address generator config
FAPI_TRY( load_addr_gen(i_target, i_program) );
// Slam the configured address maps down
FAPI_TRY( load_mcbamr( i_target, i_program) );
// Slam the config register down
FAPI_TRY( load_config( i_target, i_program) );
// Slam the control register down
FAPI_TRY( load_control( i_target, i_program) );
// Start the engine, and then poll for completion
// Note: We need to have a bit in the program for 'async' mode where an attention
// bit is set and we can fire-and-forget BRS
FAPI_TRY(start_stop(i_target, mss::START));
mss::poll(i_target, TT::STATQ_REG, i_program.iv_poll,
[&l_status](const size_t poll_remaining, const fapi2::buffer<uint64_t>& stat_reg) -> bool
{
FAPI_DBG("mcbist statq 0x%llx, remaining: %d", stat_reg, poll_remaining);
l_status = stat_reg;
return l_status.getBit<TT::MCBIST_IN_PROGRESS>() != 1;
});
// The control register has a bit for done-and-happy and a bit for done-and-unhappy
if ((l_status & l_done) == l_done)
{
FAPI_DBG("MCBIST executed successfully.");
return fapi2::current_err;
}
if ((l_status & l_fail) == l_fail)
{
FAPI_DBG("MCBIST failed execution.");
return fapi2::FAPI2_RC_FALSE;
}
// So something set more than one bit in the control register?
FAPI_DBG("MCBIST executed <shrug>. Something's not good 0x%016llx", l_status);
return fapi2::FAPI2_RC_FALSE;
fapi_try_exit:
return fapi2::current_err;
}
} // namespace
// Note: outside of the mcbist namespace
///
/// @brief Dump the registers of an mcbist
/// @param[in] i_target, the mcbist in question
/// @return fapi2::FAPI2_RC_SUCCESS if ok
///
template<>
fapi2::ReturnCode dump_regs( const fapi2::Target<TARGET_TYPE_MCBIST>& i_target )
{
return fapi2::current_err;
}
} // namespace
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