u-boot/arch/x86/include/asm/arch-ivybridge/me.h

60 lines
1.2 KiB
C
Raw Normal View History

/* SPDX-License-Identifier: GPL-2.0 */
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>
2014-11-13 05:42:28 +00:00
/*
* From Coreboot src/southbridge/intel/bd82x6x/me.h
*
* Copyright (C) 2011 The Chromium OS Authors. All rights reserved.
*/
#ifndef _ASM_INTEL_ME_H
#define _ASM_INTEL_ME_H
#include <asm/me_common.h>
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>
2014-11-13 05:42:28 +00:00
struct __packed mbp_fw_version_name {
u32 major_version:16;
u32 minor_version:16;
u32 hotfix_version:16;
u32 build_version:16;
};
struct __packed mbp_icc_profile {
u8 num_icc_profiles;
u8 icc_profile_soft_strap;
u8 icc_profile_index;
u8 reserved;
u32 register_lock_mask[3];
};
struct __packed platform_type_rule_data {
u32 platform_target_usage_type:4;
u32 platform_target_market_type:2;
u32 super_sku:1;
u32 reserved:1;
u32 intel_me_fw_image_type:4;
u32 platform_brand:4;
u32 reserved_1:16;
};
struct __packed mbp_fw_caps {
struct mefwcaps_sku fw_capabilities;
u8 available;
};
struct __packed mbp_plat_type {
struct platform_type_rule_data rule_data;
u8 available;
};
struct __packed me_bios_payload {
struct mbp_fw_version_name fw_version_name;
struct mbp_fw_caps fw_caps_sku;
struct mbp_rom_bist_data rom_bist_data;
struct mbp_platform_key platform_key;
struct mbp_plat_type fw_plat_type;
struct mbp_icc_profile icc_profile;
struct tdt_state_info at_state;
u32 mfsintegrity;
};
#endif