mirror of
https://github.com/projectacrn/acrn-hypervisor.git
synced 2025-11-03 19:15:23 +00:00
0461ac209f
Previously the min load_addr for HV image is hard coded to 0x10000000 when CONFIG_RELOC is enabled, now use CONFIG_HV_RAM_START as its prefer minimum address like setting of CONFIG_PHYSICAL_START do in Linux kernel. With this patch, we can offload the CONFIG_HV_RAM_START algorithm to acrn-config or manually set it in scenario XML on some special boards. Tracked-On: #5275 Signed-off-by: Victor Sun <victor.sun@intel.com>
342 lines
10 KiB
ArmAsm
342 lines
10 KiB
ArmAsm
/*
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* Copyright (C) 2018 Intel Corporation. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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/* NOTE:
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*
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* MISRA C requires that all unsigned constants should have the suffix 'U'
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* (e.g. 0xffU), but the assembler may not accept such C-style constants. For
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* example, binutils 2.26 fails to compile assembly in that case. To work this
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* around, all unsigned constants must be explicitly spells out in assembly
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* with a comment tracking the original expression from which the magic
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* number is calculated. As an example:
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*
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* /* 0x00000668 =
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* * (CR4_DE | CR4_PAE | CR4_MCE | CR4_OSFXSR | CR4_OSXMMEXCPT) *\/
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* movl $0x00000668, %eax
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*
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* Make sure that these numbers are updated accordingly if the definition of
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* the macros involved are changed.
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*/
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#include <config.h>
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#include <multiboot.h>
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#ifdef CONFIG_MULTIBOOT2
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#include <multiboot2.h>
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#endif
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/* MULTIBOOT HEADER */
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#define MULTIBOOT_HEADER_FLAGS MULTIBOOT_HEADER_NEED_MEMINFO
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.extern cpu_primary_save32
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.extern cpu_primary_save64
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.section multiboot_header, "a"
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.align 4
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/* header magic */
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.long MULTIBOOT_HEADER_MAGIC
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/* header flags - flags bit 6 : enable mmap_* */
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.long MULTIBOOT_HEADER_FLAGS
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/* header checksum = -(magic + flags) */
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.long -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS)
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#ifdef CONFIG_MULTIBOOT2
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.align MULTIBOOT2_HEADER_ALIGN
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mb2_header_start:
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/* Magic number indicating a Multiboot2 header. */
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.long MULTIBOOT2_HEADER_MAGIC
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/* Architecture: i386. */
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.long MULTIBOOT2_ARCHITECTURE_I386
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/* Multiboot2 header length. */
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.long mb2_header_end - mb2_header_start
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/* Multiboot2 header checksum. */
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.long -(MULTIBOOT2_HEADER_MAGIC + MULTIBOOT2_ARCHITECTURE_I386 + (mb2_header_end - mb2_header_start))
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/* please be aware that each tag should be 8 bytes aligned */
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.align MULTIBOOT2_TAG_ALIGN
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/*
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* Request infomation from boot loader, which is supposed to provide th relevant information
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* specified in the following tags to the image through the MBI if it is available
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*/
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info_req_tag_start:
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.short MULTIBOOT2_HEADER_TAG_INFORMATION_REQUEST
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.short 0
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.long info_req_tag_end - info_req_tag_start
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.long MULTIBOOT2_TAG_TYPE_MMAP /* memory map */
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.long MULTIBOOT2_TAG_TYPE_MODULE /* boot modules infomation */
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.long MULTIBOOT2_TAG_TYPE_ACPI_NEW /* a copy of RSDP as defined per ACPI 2.0 or later specification */
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.long MULTIBOOT2_TAG_TYPE_EFI64 /* EFI system table, to be passed to guest Linux */
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.long MULTIBOOT2_TAG_TYPE_EFI_MMAP /* EFI memory map, to be passed to guest Linux */
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info_req_tag_end:
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#ifdef CONFIG_RELOC
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.align MULTIBOOT2_TAG_ALIGN
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address_tag_start:
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.short MULTIBOOT2_HEADER_TAG_ADDRESS
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.short 0
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.long address_tag_end - address_tag_start
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.long mb2_header_start /* address corresponding to the beginning of the Multiboot2 header */
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.long _ld_ram_start /* load_addr: load from the binary's beginning */
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/*
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* load_end_addr: this includes .bss so that boot loader could reserve the
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* memory that .bss occupies to avoid placing boot modules or other data in that area.
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*
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* However, the boot loader is supposed not to actually load the .bss section because
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* it's beyond the scope of acrn.bin
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*/
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.long _ld_ram_end
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.long 0 /* bss_end_addr, don't ask boot loader to clear .bss */
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address_tag_end:
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.align MULTIBOOT2_TAG_ALIGN
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entry_address_tag_start:
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.short MULTIBOOT2_HEADER_TAG_ENTRY_ADDRESS
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.short 0
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.long entry_address_tag_end - entry_address_tag_start
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.long cpu_primary_start_32 /* The address to which the boot loader should jump to start hypervisor */
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entry_address_tag_end:
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.align MULTIBOOT2_TAG_ALIGN
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relocatable_tag_start:
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.short MULTIBOOT2_HEADER_TAG_RELOCATABLE
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.short 0
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.long relocatable_tag_end - relocatable_tag_start
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.long CONFIG_HV_RAM_START /* min_addr */
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.long 0x80000000 /* max_addr */
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.long 0x200000 /* image alignment */
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.long 1 /* preference: lowest possible address */
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relocatable_tag_end:
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#endif /* CONFIG_RELOC */
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.align MULTIBOOT2_TAG_ALIGN
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.short MULTIBOOT2_HEADER_TAG_END
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.short 0
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.long 8
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mb2_header_end:
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#endif /* CONFIG_MULTIBOOT2 */
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/*
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* The page tables are aligned to 4KB, which implicitly aligns this section at
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* 4KB boundary. Put an extra .align here to explicitly state that regardless
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* the actual length of the multiboot header section, this section will be linked
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* at offset 0x1000 to the beginning of the target executable.
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*/
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.align 0x1000
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.section entry, "ax"
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.align 8
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.code32
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.global cpu_primary_start_32
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cpu_primary_start_32:
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/*
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* Calculate the relocation delta between where we were compiled to run
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* at and where we were actually loaded at.
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*/
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call 0f
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0: pop %esi
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sub $0b, %esi
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/* save the MULTBOOT magic number & MBI */
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movl %eax, boot_regs(%esi)
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movl %ebx, (boot_regs+4)(%esi)
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/* Disable interrupts */
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cli
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/* Clear direction flag */
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cld
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/* detect whether it is in long mode
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*
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* 0xc0000080 = MSR_IA32_EFER
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*/
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movl $0xc0000080, %ecx
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rdmsr
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/* 0x400 = MSR_IA32_EFER_LMA_BIT */
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test $0x400, %eax
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/* jump to 64bit entry if it is already in long mode */
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jne cpu_primary_start_64
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/* Disable paging */
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mov %cr0, %ebx
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/* 0x7fffffff = ~CR0_PG */
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andl $0x7fffffff, %ebx
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mov %ebx, %cr0
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/* Set DE, PAE, MCE and OS support bits in CR4
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* 0x00000668 =
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* (CR4_DE | CR4_PAE | CR4_MCE | CR4_OSFXSR | CR4_OSXMMEXCPT) */
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movl $0x00000668, %eax
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mov %eax, %cr4
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/* fixup page table pointers with relocation delta */
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addl %esi, cpu_primary32_pdpt_addr(%esi)
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addl %esi, (cpu_primary32_pdpt_addr+8)(%esi)
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addl %esi, (cpu_primary32_pdpt_addr+16)(%esi)
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addl %esi, (cpu_primary32_pdpt_addr+24)(%esi)
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/* Set CR3 to PML4 table address */
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movl $cpu_boot32_page_tables_start, %edi
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addl %esi, %edi
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addl %esi, (%edi)
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mov %edi, %cr3
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/* Set LME bit in EFER */
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/* 0xc0000080 = MSR_IA32_EFER */
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movl $0xc0000080, %ecx
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rdmsr
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/* 0x00000100 = MSR_IA32_EFER_LME_BIT */
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orl $0x00000100, %eax
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wrmsr
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/* Enable paging, protection, numeric error and co-processor
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monitoring in CR0 to enter long mode */
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mov %cr0, %ebx
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/* 0x80000023 = (CR0_PG | CR0_PE | CR0_MP | CR0_NE) */
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orl $0x80000023, %ebx
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mov %ebx, %cr0
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/* Load temportary GDT pointer value */
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mov $cpu_primary32_gdt_ptr, %ebx
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addl %esi, %ebx
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addl %esi, 2(%ebx)
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lgdt (%ebx)
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/* Perform a long jump based to start executing in 64-bit mode */
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movl $jmpbuf_32, %eax
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addl %esi, %eax
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addl %esi, (%eax)
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ljmp *(%eax)
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jmpbuf_32:
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.long primary_start_long_mode
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/* 0x0008 = HOST_GDT_RING0_CODE_SEL */
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.word 0x0008
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/*
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* Offset from the beginning of the entry section.
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* This is to make sure that cpu_primary_start_64 is linked to a known address
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* so that efi-stub knows where to pass control to hypervisor.
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*/
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.org 0x200
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.code64
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.global cpu_primary_start_64
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cpu_primary_start_64:
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/* save the MULTBOOT magic number & MBI */
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lea boot_regs(%rip), %rax
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movl %edi, (%rax)
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movl %esi, 4(%rax)
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/* Save boot context from 64bit mode */
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call cpu_primary_save_64
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primary_start_long_mode:
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/* Initialize temporary stack pointer, size = 0x1000 */
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lea stack_for_boot(%rip), %rsp
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/* 16 = CPU_STACK_ALIGN */
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and $(~(16 - 1)),%rsp
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/*
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* Fix up the .rela sections
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* Notes: this includes the fixup to IDT tables and temporary
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* page tables
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*/
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call relocate
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call 0f
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0: pop %rsi
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sub $0b, %rsi /* relocation delta */
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/* Load temportary GDT pointer value */
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lea cpu_primary64_gdt_ptr(%rip), %rbx
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addq %rsi, 2(%rbx)
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lgdt (%ebx)
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/* Set the correct long jump address */
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lea jmpbuf_64(%rip), %rax
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lea after(%rip), %rbx
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mov %rbx, (%rax)
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rex.w ljmp *(%rax)
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jmpbuf_64: .quad 0
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/* 0x0008 = HOST_GDT_RING0_CODE_SEL */
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.word 0x0008
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after:
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/* 0x10 = HOST_GDT_RING0_DATA_SEL*/
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movl $0x10,%eax
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mov %eax,%ss // Was 32bit POC Stack
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mov %eax,%ds // Was 32bit POC Data
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mov %eax,%es // Was 32bit POC Data
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mov %eax,%fs // Was 32bit POC Data
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mov %eax,%gs // Was 32bit POC CLS
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/* continue with chipset level initialization */
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call init_primary_pcpu
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loop:
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jmp loop
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.align 4
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.global boot_regs
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boot_regs:
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.long 0x00000000
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.long 0x00000000
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/* GDT table */
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.align 4
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cpu_primary32_gdt:
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.quad 0x0000000000000000
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.quad 0x00af9b000000ffff
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.quad 0x00cf93000000ffff
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cpu_primary32_gdt_end:
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/* GDT pointer */
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.align 2
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cpu_primary32_gdt_ptr:
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.short (cpu_primary32_gdt_end - cpu_primary32_gdt) - 1
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.quad cpu_primary32_gdt
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cpu_primary64_gdt_ptr:
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.short (cpu_primary32_gdt_end - cpu_primary32_gdt) - 1
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.quad cpu_primary32_gdt
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/* PML4, PDPT, and PD tables initialized to map first 4 GBytes of memory */
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/*0x1000 = PAGE_SIZE*/
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.align 0x1000
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.global cpu_boot32_page_tables_start
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cpu_boot32_page_tables_start:
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/* 0x3 = (PAGE_PRESENT | PAGE_RW) */
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.quad cpu_primary32_pdpt_addr + 0x3
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/*0x1000 = PAGE_SIZE*/
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.align 0x1000
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cpu_primary32_pdpt_addr:
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address = 0
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.rept 4
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/* 0x3 = (PAGE_PRESENT | PAGE_RW) */
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.quad cpu_primary32_pdt_addr + address + 0x3
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/*0x1000 = PAGE_SIZE*/
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address = address + 0x1000
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.endr
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/*0x1000 = PAGE_SIZE*/
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.align 0x1000
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cpu_primary32_pdt_addr:
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address = 0
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.rept 2048
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/* 0x83 = (PAGE_PSE | PAGE_PRESENT | PAGE_RW) */
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.quad address + 0x83
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address = address + 0x200000
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.endr
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#ifdef CONFIG_MULTIBOOT2
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.global efiloader_sig
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efiloader_sig:
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.asciz "EL64"
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#endif
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