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u-boot/arch/x86/cpu/ivybridge/me_status.c
Simon Glass 65dd74a674 x86: ivybridge: Implement SDRAM init 
Implement SDRAM init using the Memory Reference Code (mrc.bin) provided in
the board directory and the SDRAM SPD information in the device tree. This
also needs the Intel Management Engine (me.bin) to work. Binary blobs
everywhere: so far we have MRC, ME and microcode.

SDRAM init works by setting up various parameters and calling the MRC. This
in turn does some sort of magic to work out how much memory there is and
the timing parameters to use. It also sets up the DRAM controllers. When
the MRC returns, we use the information it provides to map out the
available memory in U-Boot.

U-Boot normally moves itself to the top of RAM. On x86 the RAM is not
generally contiguous, and anyway some RAM may be above 4GB which doesn't
work in 32-bit mode. So we relocate to the top of the largest block of
RAM we can find below 4GB. Memory above 4GB is accessible with special
functions (see physmem).

It would be possible to build U-Boot in 64-bit mode but this wouldn't
necessarily provide any more memory, since the largest block is often below
4GB. Anyway U-Boot doesn't need huge amounts of memory - even a very large
ramdisk seldom exceeds 100-200MB. U-Boot has support for booting 64-bit
kernels directly so this does not pose a limitation in that area. Also there
are probably parts of U-Boot that will not work correctly in 64-bit mode.
The MRC is one.

There is some work remaining in this area. Since memory init is very slow
(over 500ms) it is possible to save the parameters in SPI flash to speed it
up next time. Suspend/resume support is not fully implemented, or at least
it is not efficient.

With this patch, link boots to a prompt.

Signed-off-by: Simon Glass <sjg@chromium.org>
2014-11-21 07:34:15 +01:00

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/*
* From Coreboot src/southbridge/intel/bd82x6x/me_status.c
*
* Copyright (C) 2011 The Chromium OS Authors. All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0
*/
#include <common.h>
#include <asm/arch/me.h>
/* HFS1[3:0] Current Working State Values */
static const char *const me_cws_values[] = {
[ME_HFS_CWS_RESET] = "Reset",
[ME_HFS_CWS_INIT] = "Initializing",
[ME_HFS_CWS_REC] = "Recovery",
[ME_HFS_CWS_NORMAL] = "Normal",
[ME_HFS_CWS_WAIT] = "Platform Disable Wait",
[ME_HFS_CWS_TRANS] = "OP State Transition",
[ME_HFS_CWS_INVALID] = "Invalid CPU Plugged In"
};
/* HFS1[8:6] Current Operation State Values */
static const char *const me_opstate_values[] = {
[ME_HFS_STATE_PREBOOT] = "Preboot",
[ME_HFS_STATE_M0_UMA] = "M0 with UMA",
[ME_HFS_STATE_M3] = "M3 without UMA",
[ME_HFS_STATE_M0] = "M0 without UMA",
[ME_HFS_STATE_BRINGUP] = "Bring up",
[ME_HFS_STATE_ERROR] = "M0 without UMA but with error"
};
/* HFS[19:16] Current Operation Mode Values */
static const char *const me_opmode_values[] = {
[ME_HFS_MODE_NORMAL] = "Normal",
[ME_HFS_MODE_DEBUG] = "Debug",
[ME_HFS_MODE_DIS] = "Soft Temporary Disable",
[ME_HFS_MODE_OVER_JMPR] = "Security Override via Jumper",
[ME_HFS_MODE_OVER_MEI] = "Security Override via MEI Message"
};
/* HFS[15:12] Error Code Values */
static const char *const me_error_values[] = {
[ME_HFS_ERROR_NONE] = "No Error",
[ME_HFS_ERROR_UNCAT] = "Uncategorized Failure",
[ME_HFS_ERROR_IMAGE] = "Image Failure",
[ME_HFS_ERROR_DEBUG] = "Debug Failure"
};
/* GMES[31:28] ME Progress Code */
static const char *const me_progress_values[] = {
[ME_GMES_PHASE_ROM] = "ROM Phase",
[ME_GMES_PHASE_BUP] = "BUP Phase",
[ME_GMES_PHASE_UKERNEL] = "uKernel Phase",
[ME_GMES_PHASE_POLICY] = "Policy Module",
[ME_GMES_PHASE_MODULE] = "Module Loading",
[ME_GMES_PHASE_UNKNOWN] = "Unknown",
[ME_GMES_PHASE_HOST] = "Host Communication"
};
/* GMES[27:24] Power Management Event */
static const char *const me_pmevent_values[] = {
[0x00] = "Clean Moff->Mx wake",
[0x01] = "Moff->Mx wake after an error",
[0x02] = "Clean global reset",
[0x03] = "Global reset after an error",
[0x04] = "Clean Intel ME reset",
[0x05] = "Intel ME reset due to exception",
[0x06] = "Pseudo-global reset",
[0x07] = "S0/M0->Sx/M3",
[0x08] = "Sx/M3->S0/M0",
[0x09] = "Non-power cycle reset",
[0x0a] = "Power cycle reset through M3",
[0x0b] = "Power cycle reset through Moff",
[0x0c] = "Sx/Mx->Sx/Moff"
};
/* Progress Code 0 states */
static const char *const me_progress_rom_values[] = {
[0x00] = "BEGIN",
[0x06] = "DISABLE"
};
/* Progress Code 1 states */
static const char *const me_progress_bup_values[] = {
[0x00] = "Initialization starts",
[0x01] = "Disable the host wake event",
[0x04] = "Flow determination start process",
[0x08] = "Error reading/matching the VSCC table in the descriptor",
[0x0a] = "Check to see if straps say ME DISABLED",
[0x0b] = "Timeout waiting for PWROK",
[0x0d] = "Possibly handle BUP manufacturing override strap",
[0x11] = "Bringup in M3",
[0x12] = "Bringup in M0",
[0x13] = "Flow detection error",
[0x15] = "M3 clock switching error",
[0x18] = "M3 kernel load",
[0x1c] = "T34 missing - cannot program ICC",
[0x1f] = "Waiting for DID BIOS message",
[0x20] = "Waiting for DID BIOS message failure",
[0x21] = "DID reported an error",
[0x22] = "Enabling UMA",
[0x23] = "Enabling UMA error",
[0x24] = "Sending DID Ack to BIOS",
[0x25] = "Sending DID Ack to BIOS error",
[0x26] = "Switching clocks in M0",
[0x27] = "Switching clocks in M0 error",
[0x28] = "ME in temp disable",
[0x32] = "M0 kernel load",
};
/* Progress Code 3 states */
static const char *const me_progress_policy_values[] = {
[0x00] = "Entery into Policy Module",
[0x03] = "Received S3 entry",
[0x04] = "Received S4 entry",
[0x05] = "Received S5 entry",
[0x06] = "Received UPD entry",
[0x07] = "Received PCR entry",
[0x08] = "Received NPCR entry",
[0x09] = "Received host wake",
[0x0a] = "Received AC<>DC switch",
[0x0b] = "Received DRAM Init Done",
[0x0c] = "VSCC Data not found for flash device",
[0x0d] = "VSCC Table is not valid",
[0x0e] = "Flash Partition Boundary is outside address space",
[0x0f] = "ME cannot access the chipset descriptor region",
[0x10] = "Required VSCC values for flash parts do not match",
};
void intel_me_status(struct me_hfs *hfs, struct me_gmes *gmes)
{
/* Check Current States */
debug("ME: FW Partition Table : %s\n",
hfs->fpt_bad ? "BAD" : "OK");
debug("ME: Bringup Loader Failure : %s\n",
hfs->ft_bup_ld_flr ? "YES" : "NO");
debug("ME: Firmware Init Complete : %s\n",
hfs->fw_init_complete ? "YES" : "NO");
debug("ME: Manufacturing Mode : %s\n",
hfs->mfg_mode ? "YES" : "NO");
debug("ME: Boot Options Present : %s\n",
hfs->boot_options_present ? "YES" : "NO");
debug("ME: Update In Progress : %s\n",
hfs->update_in_progress ? "YES" : "NO");
debug("ME: Current Working State : %s\n",
me_cws_values[hfs->working_state]);
debug("ME: Current Operation State : %s\n",
me_opstate_values[hfs->operation_state]);
debug("ME: Current Operation Mode : %s\n",
me_opmode_values[hfs->operation_mode]);
debug("ME: Error Code : %s\n",
me_error_values[hfs->error_code]);
debug("ME: Progress Phase : %s\n",
me_progress_values[gmes->progress_code]);
debug("ME: Power Management Event : %s\n",
me_pmevent_values[gmes->current_pmevent]);
debug("ME: Progress Phase State : ");
switch (gmes->progress_code) {
case ME_GMES_PHASE_ROM: /* ROM Phase */
debug("%s", me_progress_rom_values[gmes->current_state]);
break;
case ME_GMES_PHASE_BUP: /* Bringup Phase */
if (gmes->current_state < ARRAY_SIZE(me_progress_bup_values) &&
me_progress_bup_values[gmes->current_state])
debug("%s",
me_progress_bup_values[gmes->current_state]);
else
debug("0x%02x", gmes->current_state);
break;
case ME_GMES_PHASE_POLICY: /* Policy Module Phase */
if (gmes->current_state <
ARRAY_SIZE(me_progress_policy_values) &&
me_progress_policy_values[gmes->current_state])
debug("%s",
me_progress_policy_values[gmes->current_state]);
else
debug("0x%02x", gmes->current_state);
break;
case ME_GMES_PHASE_HOST: /* Host Communication Phase */
if (!gmes->current_state)
debug("Host communication established");
else
debug("0x%02x", gmes->current_state);
break;
default:
debug("Unknown 0x%02x", gmes->current_state);
}
debug("\n");
}
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