diff options
Diffstat (limited to 'roms/u-boot/arch/riscv/lib/crt0_riscv_efi.S')
| -rw-r--r-- | roms/u-boot/arch/riscv/lib/crt0_riscv_efi.S | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/roms/u-boot/arch/riscv/lib/crt0_riscv_efi.S b/roms/u-boot/arch/riscv/lib/crt0_riscv_efi.S new file mode 100644 index 000000000..e7c4d99c2 --- /dev/null +++ b/roms/u-boot/arch/riscv/lib/crt0_riscv_efi.S @@ -0,0 +1,176 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * crt0-efi-riscv.S - PE/COFF header for RISC-V EFI applications + * + * Copright (C) 2014 Linaro Ltd. <ard.biesheuvel@linaro.org> + * Copright (C) 2018 Alexander Graf <agraf@suse.de> + * + * This file is inspired by arch/arm/lib/crt0_aarch64_efi.S + */ + +#include <asm-generic/pe.h> + +#if __riscv_xlen == 64 +#define SIZE_LONG 8 +#define SAVE_LONG(reg, idx) sd reg, (idx*SIZE_LONG)(sp) +#define LOAD_LONG(reg, idx) ld reg, (idx*SIZE_LONG)(sp) +#define PE_MACHINE IMAGE_FILE_MACHINE_RISCV64 +#define PE_MAGIC IMAGE_NT_OPTIONAL_HDR64_MAGIC +#else +#define SIZE_LONG 4 +#define SAVE_LONG(reg, idx) sw reg, (idx*SIZE_LONG)(sp) +#define LOAD_LONG(reg, idx) lw reg, (idx*SIZE_LONG)(sp) +#define PE_MACHINE IMAGE_FILE_MACHINE_RISCV32 +#define PE_MAGIC IMAGE_NT_OPTIONAL_HDR32_MAGIC +#endif + + + .section .text.head + + /* + * Magic "MZ" signature for PE/COFF + */ + .globl ImageBase +ImageBase: + .short IMAGE_DOS_SIGNATURE /* 'MZ' */ + .skip 58 /* 'MZ' + pad + offset == 64 */ + .long pe_header - ImageBase /* Offset to the PE header */ +pe_header: + .long IMAGE_NT_SIGNATURE /* 'PE' */ +coff_header: + .short PE_MACHINE /* RISC-V 64/32-bit */ + .short 2 /* nr_sections */ + .long 0 /* TimeDateStamp */ + .long 0 /* PointerToSymbolTable */ + .long 0 /* NumberOfSymbols */ + .short section_table - optional_header /* SizeOfOptionalHeader */ + /* Characteristics */ + .short (IMAGE_FILE_EXECUTABLE_IMAGE | \ + IMAGE_FILE_LINE_NUMS_STRIPPED | \ + IMAGE_FILE_LOCAL_SYMS_STRIPPED | \ + IMAGE_FILE_DEBUG_STRIPPED) +optional_header: + .short PE_MAGIC /* PE32(+) format */ + .byte 0x02 /* MajorLinkerVersion */ + .byte 0x14 /* MinorLinkerVersion */ + .long _edata - _start /* SizeOfCode */ + .long 0 /* SizeOfInitializedData */ + .long 0 /* SizeOfUninitializedData */ + .long _start - ImageBase /* AddressOfEntryPoint */ + .long _start - ImageBase /* BaseOfCode */ +#if __riscv_xlen == 32 + .long 0 /* BaseOfData */ +#endif + +extra_header_fields: +#if __riscv_xlen == 32 + .long 0 /* ImageBase */ +#else + .quad 0 /* ImageBase */ +#endif + .long 0x20 /* SectionAlignment */ + .long 0x8 /* FileAlignment */ + .short 0 /* MajorOperatingSystemVersion */ + .short 0 /* MinorOperatingSystemVersion */ + .short 0 /* MajorImageVersion */ + .short 0 /* MinorImageVersion */ + .short 0 /* MajorSubsystemVersion */ + .short 0 /* MinorSubsystemVersion */ + .long 0 /* Win32VersionValue */ + + .long _edata - ImageBase /* SizeOfImage */ + + /* + * Everything before the kernel image is considered part of the header + */ + .long _start - ImageBase /* SizeOfHeaders */ + .long 0 /* CheckSum */ + .short IMAGE_SUBSYSTEM_EFI_APPLICATION /* Subsystem */ + .short 0 /* DllCharacteristics */ +#if __riscv_xlen == 32 + .long 0 /* SizeOfStackReserve */ + .long 0 /* SizeOfStackCommit */ + .long 0 /* SizeOfHeapReserve */ + .long 0 /* SizeOfHeapCommit */ +#else + .quad 0 /* SizeOfStackReserve */ + .quad 0 /* SizeOfStackCommit */ + .quad 0 /* SizeOfHeapReserve */ + .quad 0 /* SizeOfHeapCommit */ +#endif + .long 0 /* LoaderFlags */ + .long 0x6 /* NumberOfRvaAndSizes */ + + .quad 0 /* ExportTable */ + .quad 0 /* ImportTable */ + .quad 0 /* ResourceTable */ + .quad 0 /* ExceptionTable */ + .quad 0 /* CertificationTable */ + .quad 0 /* BaseRelocationTable */ + .quad 0 /* Debug */ + .quad 0 /* Architecture */ + .quad 0 /* Global Ptr */ + .quad 0 /* TLS Table */ + .quad 0 /* Load Config Table */ + .quad 0 /* Bound Import */ + .quad 0 /* IAT */ + .quad 0 /* Delay Import Descriptor */ + .quad 0 /* CLR Runtime Header */ + .quad 0 /* Reserved */ + + /* Section table */ +section_table: + + /* + * The EFI application loader requires a relocation section + * because EFI applications must be relocatable. This is a + * dummy section as far as we are concerned. + */ + .ascii ".reloc" + .byte 0 + .byte 0 /* end of 0 padding of section name */ + .long 0 + .long 0 + .long 0 /* SizeOfRawData */ + .long 0 /* PointerToRawData */ + .long 0 /* PointerToRelocations */ + .long 0 /* PointerToLineNumbers */ + .short 0 /* NumberOfRelocations */ + .short 0 /* NumberOfLineNumbers */ + .long 0x42100040 /* Characteristics (section flags) */ + + + .ascii ".text" + .byte 0 + .byte 0 + .byte 0 /* end of 0 padding of section name */ + .long _edata - _start /* VirtualSize */ + .long _start - ImageBase /* VirtualAddress */ + .long _edata - _start /* SizeOfRawData */ + .long _start - ImageBase /* PointerToRawData */ + + .long 0 /* PointerToRelocations (0 for executables) */ + .long 0 /* PointerToLineNumbers (0 for executables) */ + .short 0 /* NumberOfRelocations (0 for executables) */ + .short 0 /* NumberOfLineNumbers (0 for executables) */ + .long 0xe0500020 /* Characteristics (section flags) */ + +_start: + addi sp, sp, -(SIZE_LONG * 3) + SAVE_LONG(a0, 0) + SAVE_LONG(a1, 1) + SAVE_LONG(ra, 2) + + lla a0, ImageBase + lla a1, _DYNAMIC + call _relocate + bne a0, zero, 0f + + LOAD_LONG(a1, 1) + LOAD_LONG(a0, 0) + call efi_main + + LOAD_LONG(ra, 2) + +0: addi sp, sp, (SIZE_LONG * 3) + ret |