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Honor STOP Gated bit when checking access states
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Change-Id: I08d2b377414f0f0491a731efee02359f6cefc27b
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/40920
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Reviewed-by: Christian R. Geddes <crgeddes@us.ibm.com>
Reviewed-by: Gregory S. Still <stillgs@us.ibm.com>
Tested-by: Hostboot CI <hostboot-ci+hostboot@us.ibm.com>
Reviewed-by: Jennifer A. Stofer <stofer@us.ibm.com>
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/40924
Reviewed-by: Hostboot Team <hostboot@us.ibm.com>
Tested-by: Jenkins OP Build CI <op-jenkins+hostboot@us.ibm.com>
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>
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@sannerd @dcrowell77
sannerd authored and dcrowell77 committed May 25, 2017
1 parent acda24e commit 1ca209e
Showing 1 changed file with 47 additions and 42 deletions.
89 changes: 47 additions & 42 deletions src/import/chips/p9/procedures/hwp/pm/p9_query_cache_access_state.C
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Expand Up @@ -60,6 +60,7 @@ const uint32_t eq_clk_l2_pos[] = {8, 9};
const uint32_t eq_clk_l3_pos[] = {6, 7};
const uint32_t SSH_REG_STOP_LEVEL = 8;
const uint32_t SSH_REG_STOP_LEVEL_LEN = 4;
const uint32_t SSH_REG_STOP_GATED = 0;

// ----------------------------------------------------------------------
// Procedure Function
Expand Down Expand Up @@ -115,57 +116,61 @@ p9_query_cache_access_state(
o_l3_is_scomable = 1;
o_l3_is_scannable = 1;

// STOP8 - Half Quad Deep Sleep
// VSU, ISU are powered off
// IFU, LSU are powered off
// PC, Core EPS are powered off
// L20-EX0 is clocked off if both cores are >= 8
// L20-EX1 is clocked off if both cores are >= 8
if (l_quadStopLevel >= 8)
//Looking at the stop states is only valid if quad is stop gated -- else it is fully running
if (l_qsshsrc.getBit(SSH_REG_STOP_GATED))
{
o_l2_is_scomable = 0;
}
// STOP8 - Half Quad Deep Sleep
// VSU, ISU are powered off
// IFU, LSU are powered off
// PC, Core EPS are powered off
// L20-EX0 is clocked off if both cores are >= 8
// L20-EX1 is clocked off if both cores are >= 8
if (l_quadStopLevel >= 8)
{
o_l2_is_scomable = 0;
}

// STOP9 - Fast Winkle (lab use only)
// Both cores and cache are clocked off
if (l_quadStopLevel >= 9)
{
o_l3_is_scomable = 0;
}
// STOP9 - Fast Winkle (lab use only)
// Both cores and cache are clocked off
if (l_quadStopLevel >= 9)
{
o_l3_is_scomable = 0;
}

// STOP11 - Deep Winkle
// Both cores and cache are powered off
if (l_quadStopLevel >= 11)
{
o_l2_is_scannable = 0;
o_l3_is_scannable = 0;
}
else
{
//Read clock status to confirm stop state history is accurate
//If we trust the stop state history, this could be removed to save on code size
//Compare Hardware status vs stop state status. If there is a mismatch the HW value overrides the stop state
// STOP11 - Deep Winkle
// Both cores and cache are powered off
if (l_quadStopLevel >= 11)
{
o_l2_is_scannable = 0;
o_l3_is_scannable = 0;
}
else
{
//Read clock status to confirm stop state history is accurate
//If we trust the stop state history, this could be removed to save on code size
//Compare Hardware status vs stop state status. If there is a mismatch the HW value overrides the stop state

FAPI_TRY(fapi2::getScom(i_target, EQ_CLOCK_STAT_SL, l_data64), "Error reading data from EQ_CLOCK_STAT_SL");
FAPI_TRY(fapi2::getScom(i_target, EQ_CLOCK_STAT_SL, l_data64), "Error reading data from EQ_CLOCK_STAT_SL");

FAPI_TRY(FAPI_ATTR_GET(fapi2::ATTR_CHIP_UNIT_POS, i_target, l_chpltNumber),
"Error: Failed to get the position of the EX:0x%08X", i_target);
l_exPos = l_chpltNumber % 2;
FAPI_TRY(FAPI_ATTR_GET(fapi2::ATTR_CHIP_UNIT_POS, i_target, l_chpltNumber),
"Error: Failed to get the position of the EX:0x%08X", i_target);
l_exPos = l_chpltNumber % 2;

l_is_scomable = !l_data64.getBit(eq_clk_l2_pos[l_exPos]);
l_is_scomable = !l_data64.getBit(eq_clk_l2_pos[l_exPos]);

if (o_l2_is_scomable != l_is_scomable)
{
FAPI_INF("Clock status didn't match stop state, overriding is_scomable status");
o_l2_is_scomable = l_is_scomable;
}
if (o_l2_is_scomable != l_is_scomable)
{
FAPI_INF("Clock status didn't match stop state, overriding is_scomable status");
o_l2_is_scomable = l_is_scomable;
}

l_is_scomable = !l_data64.getBit(eq_clk_l3_pos[l_exPos]);
l_is_scomable = !l_data64.getBit(eq_clk_l3_pos[l_exPos]);

if (o_l3_is_scomable != l_is_scomable)
{
FAPI_INF("Clock status didn't match stop state, overriding is_scomable status");
o_l3_is_scomable = l_is_scomable;
if (o_l3_is_scomable != l_is_scomable)
{
FAPI_INF("Clock status didn't match stop state, overriding is_scomable status");
o_l3_is_scomable = l_is_scomable;
}
}
}

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