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https://github.com/brain-hackers/u-boot-brain
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![Simon Glass](/assets/img/avatar_default.png)
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>
357 lines
7.1 KiB
C
357 lines
7.1 KiB
C
/*
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* From Coreboot src/southbridge/intel/bd82x6x/me.h
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*
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* Copyright (C) 2011 The Chromium OS Authors. All rights reserved.
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*
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* SPDX-License-Identifier: GPL-2.0
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*/
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#ifndef _ASM_INTEL_ME_H
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#define _ASM_INTEL_ME_H
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#include <linux/compiler.h>
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#include <linux/types.h>
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#define ME_RETRY 100000 /* 1 second */
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#define ME_DELAY 10 /* 10 us */
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/*
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* Management Engine PCI registers
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*/
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#define PCI_CPU_MEBASE_L 0x70 /* Set by MRC */
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#define PCI_CPU_MEBASE_H 0x74 /* Set by MRC */
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#define PCI_ME_HFS 0x40
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#define ME_HFS_CWS_RESET 0
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#define ME_HFS_CWS_INIT 1
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#define ME_HFS_CWS_REC 2
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#define ME_HFS_CWS_NORMAL 5
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#define ME_HFS_CWS_WAIT 6
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#define ME_HFS_CWS_TRANS 7
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#define ME_HFS_CWS_INVALID 8
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#define ME_HFS_STATE_PREBOOT 0
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#define ME_HFS_STATE_M0_UMA 1
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#define ME_HFS_STATE_M3 4
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#define ME_HFS_STATE_M0 5
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#define ME_HFS_STATE_BRINGUP 6
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#define ME_HFS_STATE_ERROR 7
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#define ME_HFS_ERROR_NONE 0
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#define ME_HFS_ERROR_UNCAT 1
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#define ME_HFS_ERROR_IMAGE 3
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#define ME_HFS_ERROR_DEBUG 4
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#define ME_HFS_MODE_NORMAL 0
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#define ME_HFS_MODE_DEBUG 2
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#define ME_HFS_MODE_DIS 3
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#define ME_HFS_MODE_OVER_JMPR 4
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#define ME_HFS_MODE_OVER_MEI 5
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#define ME_HFS_BIOS_DRAM_ACK 1
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#define ME_HFS_ACK_NO_DID 0
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#define ME_HFS_ACK_RESET 1
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#define ME_HFS_ACK_PWR_CYCLE 2
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#define ME_HFS_ACK_S3 3
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#define ME_HFS_ACK_S4 4
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#define ME_HFS_ACK_S5 5
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#define ME_HFS_ACK_GBL_RESET 6
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#define ME_HFS_ACK_CONTINUE 7
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struct me_hfs {
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u32 working_state:4;
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u32 mfg_mode:1;
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u32 fpt_bad:1;
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u32 operation_state:3;
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u32 fw_init_complete:1;
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u32 ft_bup_ld_flr:1;
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u32 update_in_progress:1;
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u32 error_code:4;
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u32 operation_mode:4;
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u32 reserved:4;
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u32 boot_options_present:1;
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u32 ack_data:3;
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u32 bios_msg_ack:4;
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} __packed;
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#define PCI_ME_UMA 0x44
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struct me_uma {
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u32 size:6;
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u32 reserved_1:10;
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u32 valid:1;
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u32 reserved_0:14;
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u32 set_to_one:1;
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} __packed;
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#define PCI_ME_H_GS 0x4c
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#define ME_INIT_DONE 1
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#define ME_INIT_STATUS_SUCCESS 0
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#define ME_INIT_STATUS_NOMEM 1
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#define ME_INIT_STATUS_ERROR 2
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struct me_did {
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u32 uma_base:16;
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u32 reserved:8;
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u32 status:4;
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u32 init_done:4;
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} __packed;
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#define PCI_ME_GMES 0x48
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#define ME_GMES_PHASE_ROM 0
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#define ME_GMES_PHASE_BUP 1
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#define ME_GMES_PHASE_UKERNEL 2
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#define ME_GMES_PHASE_POLICY 3
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#define ME_GMES_PHASE_MODULE 4
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#define ME_GMES_PHASE_UNKNOWN 5
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#define ME_GMES_PHASE_HOST 6
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struct me_gmes {
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u32 bist_in_prog:1;
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u32 icc_prog_sts:2;
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u32 invoke_mebx:1;
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u32 cpu_replaced_sts:1;
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u32 mbp_rdy:1;
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u32 mfs_failure:1;
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u32 warm_rst_req_for_df:1;
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u32 cpu_replaced_valid:1;
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u32 reserved_1:2;
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u32 fw_upd_ipu:1;
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u32 reserved_2:4;
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u32 current_state:8;
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u32 current_pmevent:4;
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u32 progress_code:4;
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} __packed;
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#define PCI_ME_HERES 0xbc
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#define PCI_ME_EXT_SHA1 0x00
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#define PCI_ME_EXT_SHA256 0x02
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#define PCI_ME_HER(x) (0xc0+(4*(x)))
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struct me_heres {
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u32 extend_reg_algorithm:4;
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u32 reserved:26;
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u32 extend_feature_present:1;
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u32 extend_reg_valid:1;
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} __packed;
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/*
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* Management Engine MEI registers
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*/
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#define MEI_H_CB_WW 0x00
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#define MEI_H_CSR 0x04
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#define MEI_ME_CB_RW 0x08
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#define MEI_ME_CSR_HA 0x0c
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struct mei_csr {
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u32 interrupt_enable:1;
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u32 interrupt_status:1;
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u32 interrupt_generate:1;
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u32 ready:1;
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u32 reset:1;
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u32 reserved:3;
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u32 buffer_read_ptr:8;
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u32 buffer_write_ptr:8;
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u32 buffer_depth:8;
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} __packed;
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#define MEI_ADDRESS_CORE 0x01
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#define MEI_ADDRESS_AMT 0x02
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#define MEI_ADDRESS_RESERVED 0x03
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#define MEI_ADDRESS_WDT 0x04
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#define MEI_ADDRESS_MKHI 0x07
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#define MEI_ADDRESS_ICC 0x08
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#define MEI_ADDRESS_THERMAL 0x09
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#define MEI_HOST_ADDRESS 0
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struct mei_header {
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u32 client_address:8;
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u32 host_address:8;
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u32 length:9;
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u32 reserved:6;
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u32 is_complete:1;
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} __packed;
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#define MKHI_GROUP_ID_CBM 0x00
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#define MKHI_GROUP_ID_FWCAPS 0x03
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#define MKHI_GROUP_ID_MDES 0x08
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#define MKHI_GROUP_ID_GEN 0xff
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#define MKHI_GLOBAL_RESET 0x0b
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#define MKHI_FWCAPS_GET_RULE 0x02
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#define MKHI_MDES_ENABLE 0x09
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#define MKHI_GET_FW_VERSION 0x02
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#define MKHI_END_OF_POST 0x0c
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#define MKHI_FEATURE_OVERRIDE 0x14
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struct mkhi_header {
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u32 group_id:8;
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u32 command:7;
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u32 is_response:1;
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u32 reserved:8;
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u32 result:8;
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} __packed;
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struct me_fw_version {
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u16 code_minor;
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u16 code_major;
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u16 code_build_number;
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u16 code_hot_fix;
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u16 recovery_minor;
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u16 recovery_major;
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u16 recovery_build_number;
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u16 recovery_hot_fix;
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} __packed;
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#define HECI_EOP_STATUS_SUCCESS 0x0
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#define HECI_EOP_PERFORM_GLOBAL_RESET 0x1
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#define CBM_RR_GLOBAL_RESET 0x01
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#define GLOBAL_RESET_BIOS_MRC 0x01
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#define GLOBAL_RESET_BIOS_POST 0x02
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#define GLOBAL_RESET_MEBX 0x03
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struct me_global_reset {
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u8 request_origin;
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u8 reset_type;
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} __packed;
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enum me_bios_path {
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ME_NORMAL_BIOS_PATH,
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ME_S3WAKE_BIOS_PATH,
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ME_ERROR_BIOS_PATH,
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ME_RECOVERY_BIOS_PATH,
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ME_DISABLE_BIOS_PATH,
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ME_FIRMWARE_UPDATE_BIOS_PATH,
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};
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struct __packed mbp_fw_version_name {
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u32 major_version:16;
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u32 minor_version:16;
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u32 hotfix_version:16;
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u32 build_version:16;
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};
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struct __packed mbp_icc_profile {
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u8 num_icc_profiles;
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u8 icc_profile_soft_strap;
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u8 icc_profile_index;
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u8 reserved;
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u32 register_lock_mask[3];
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};
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struct __packed mefwcaps_sku {
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u32 full_net:1;
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u32 std_net:1;
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u32 manageability:1;
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u32 small_business:1;
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u32 l3manageability:1;
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u32 intel_at:1;
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u32 intel_cls:1;
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u32 reserved:3;
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u32 intel_mpc:1;
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u32 icc_over_clocking:1;
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u32 pavp:1;
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u32 reserved_1:4;
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u32 ipv6:1;
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u32 kvm:1;
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u32 och:1;
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u32 vlan:1;
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u32 tls:1;
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u32 reserved_4:1;
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u32 wlan:1;
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u32 reserved_5:8;
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};
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struct __packed tdt_state_flag {
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u16 lock_state:1;
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u16 authenticate_module:1;
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u16 s3authentication:1;
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u16 flash_wear_out:1;
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u16 flash_variable_security:1;
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u16 wwan3gpresent:1;
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u16 wwan3goob:1;
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u16 reserved:9;
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};
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struct __packed tdt_state_info {
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u8 state;
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u8 last_theft_trigger;
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struct tdt_state_flag flags;
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};
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struct __packed platform_type_rule_data {
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u32 platform_target_usage_type:4;
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u32 platform_target_market_type:2;
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u32 super_sku:1;
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u32 reserved:1;
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u32 intel_me_fw_image_type:4;
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u32 platform_brand:4;
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u32 reserved_1:16;
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};
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struct __packed mbp_fw_caps {
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struct mefwcaps_sku fw_capabilities;
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u8 available;
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};
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struct __packed mbp_rom_bist_data {
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u16 device_id;
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u16 fuse_test_flags;
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u32 umchid[4];
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};
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struct __packed mbp_platform_key {
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u32 key[8];
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};
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struct __packed mbp_plat_type {
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struct platform_type_rule_data rule_data;
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u8 available;
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};
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struct __packed me_bios_payload {
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struct mbp_fw_version_name fw_version_name;
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struct mbp_fw_caps fw_caps_sku;
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struct mbp_rom_bist_data rom_bist_data;
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struct mbp_platform_key platform_key;
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struct mbp_plat_type fw_plat_type;
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struct mbp_icc_profile icc_profile;
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struct tdt_state_info at_state;
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u32 mfsintegrity;
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};
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struct __packed mbp_header {
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u32 mbp_size:8;
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u32 num_entries:8;
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u32 rsvd:16;
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};
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struct __packed mbp_item_header {
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u32 app_id:8;
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u32 item_id:8;
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u32 length:8;
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u32 rsvd:8;
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};
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struct __packed me_fwcaps {
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u32 id;
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u8 length;
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struct mefwcaps_sku caps_sku;
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u8 reserved[3];
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};
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/* Defined in me_status.c for both romstage and ramstage */
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void intel_me_status(struct me_hfs *hfs, struct me_gmes *gmes);
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void intel_early_me_status(void);
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int intel_early_me_init(void);
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int intel_early_me_uma_size(void);
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int intel_early_me_init_done(u8 status);
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#endif
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