From: Tilman Sauerbeck Date: Mon, 8 Jul 2019 18:38:16 +0000 (+0200) Subject: bootloader: Import bootloader-final.ld. X-Git-Url: http://git.code-monkey.de/?a=commitdiff_plain;h=69f57fcaee4e0a62192a87b21ed31142624ce009;p=gps-watch.git bootloader: Import bootloader-final.ld. This is used to link the final bootloader described in the previous commit. --- diff --git a/SConscript.target b/SConscript.target index 8ee82a3..b5eb085 100644 --- a/SConscript.target +++ b/SConscript.target @@ -51,22 +51,35 @@ libbootloader_source_files = [ 'src/bootloader/flash.rs', ] -libbootloader = env.Rustc('libbootloader.a', libbootloader_source_files[0]) +start_o = env.Object('src/bootloader/start.c') -for f in libbootloader_source_files: - Depends(libbootloader, f) +for s in ['intermediate', 'final']: + libbootloader_env = env.Clone() -Depends(libbootloader, 'libcommon.rlib') -Depends(libbootloader, 'libcommon.a') + libbootloader_env.Append(RUSTCFLAGS = [ + '--cfg', + 'bootloader_type=\\"{}\\"'.format(s) + ]) -bootloader_env = env.Clone() + libbootloader = libbootloader_env.Rustc('libbootloader-{}.a'.format(s), + libbootloader_source_files[0]) -bootloader_env.Append(LINKFLAGS = [ - '-Tsrc/bootloader/bootloader-intermediate.ld', -]) + for f in libbootloader_source_files: + Depends(libbootloader, f) + + Depends(libbootloader, 'libcommon.rlib') + Depends(libbootloader, 'libcommon.a') + + bootloader_env = env.Clone() + + bootloader_env.Append(LINKFLAGS = [ + '-Tsrc/bootloader/bootloader-{}.ld'.format(s), + ]) -bootloader_elf = bootloader_env.Program('gps-watch-bootloader.elf', 'src/bootloader/start.c', LIBS = ['bootloader', 'common']) + bootloader_elf = \ + bootloader_env.Program('gps-watch-bootloader-{}.elf'.format(s), + start_o, LIBS = ['bootloader-{}'.format(s), 'common']) -bootloader_bin = bootloader_env.Objcopy(bootloader_elf) + bootloader_bin = bootloader_env.Objcopy(bootloader_elf) -Default(bootloader_bin) + Default(bootloader_bin) diff --git a/src/bootloader/bootloader-final.ld b/src/bootloader/bootloader-final.ld new file mode 100644 index 0000000..56f20cc --- /dev/null +++ b/src/bootloader/bootloader-final.ld @@ -0,0 +1,174 @@ +/* This is a copy of + * CMSIS/Device/ARM/ARMCM0plus/Source/GCC/gcc_arm.ld + * taken from + * git://github.com/ARM-software/CMSIS + */ + +/* Linker script to configure memory regions. */ +MEMORY +{ + FLASH (rx) + : ORIGIN = 0x00000000, LENGTH = 0x08000 + + RAM (rwx) + : ORIGIN = 0x1fffe000, LENGTH = 0x08000 +} + +/* Library configurations */ +GROUP(libgcc.a libc.a libm.a libnosys.a) + +/* Linker script to place sections and symbol values. Should be used together + * with other linker script that defines memory regions FLASH and RAM. + * It references following symbols, which must be defined in code: + * Reset_Handler : Entry of reset handler + * + * It defines following symbols, which code can use without definition: + * __exidx_start + * __exidx_end + * __etext + * __data_start__ + * __preinit_array_start + * __preinit_array_end + * __init_array_start + * __init_array_end + * __fini_array_start + * __fini_array_end + * __data_end__ + * __bss_start__ + * __bss_end__ + * __end__ + * end + * __HeapLimit + * __StackLimit + * __StackTop + * __stack + */ +ENTRY(Reset_Handler) + +SECTIONS +{ + .text : + { + KEEP(*(.vectors)) + __end__ = .; + + /* The flash configuration field: */ + . = ALIGN(0x400); + LONG(0x001a0933); + LONG(0xffffffff); + LONG(0xffffffff); + LONG(0xfffffb7e); + + /* Don't put any other code in there so we may avoid + * erasing and re-programming it. + */ + . = ALIGN(0x800); + + *(.text*) + + KEEP(*(.init)) + KEEP(*(.fini)) + + /* .ctors */ + *crtbegin.o(.ctors) + *crtbegin?.o(.ctors) + *(EXCLUDE_FILE(*crtend?.o *crtend.o) .ctors) + *(SORT(.ctors.*)) + *(.ctors) + + /* .dtors */ + *crtbegin.o(.dtors) + *crtbegin?.o(.dtors) + *(EXCLUDE_FILE(*crtend?.o *crtend.o) .dtors) + *(SORT(.dtors.*)) + *(.dtors) + + *(.rodata*) + + KEEP(*(.eh_frame*)) + } > FLASH =0xff + + .ARM.extab : + { + *(.ARM.extab* .gnu.linkonce.armextab.*) + } > FLASH + + __exidx_start = .; + .ARM.exidx : + { + *(.ARM.exidx* .gnu.linkonce.armexidx.*) + } > FLASH + __exidx_end = .; + + __etext = .; + + .data : AT (__etext) + { + __data_start__ = .; + *(vtable) + *(.data*) + + . = ALIGN(4); + /* preinit data */ + PROVIDE_HIDDEN (__preinit_array_start = .); + KEEP(*(.preinit_array)) + PROVIDE_HIDDEN (__preinit_array_end = .); + + . = ALIGN(4); + /* init data */ + PROVIDE_HIDDEN (__init_array_start = .); + KEEP(*(SORT(.init_array.*))) + KEEP(*(.init_array)) + PROVIDE_HIDDEN (__init_array_end = .); + + + . = ALIGN(4); + /* finit data */ + PROVIDE_HIDDEN (__fini_array_start = .); + KEEP(*(SORT(.fini_array.*))) + KEEP(*(.fini_array)) + PROVIDE_HIDDEN (__fini_array_end = .); + + KEEP(*(.jcr*)) + . = ALIGN(4); + /* All data end */ + __data_end__ = .; + + } > RAM + + .bss : + { + . = ALIGN(4); + __bss_start__ = .; + *(.bss*) + *(COMMON) + . = ALIGN(4); + __bss_end__ = .; + } > RAM + + .heap (COPY): + { + __HeapBase = .; + __end__ = .; + end = __end__; + KEEP(*(.heap*)) + __HeapLimit = .; + } > RAM + + /* .stack_dummy section doesn't contains any symbols. It is only + * used for linker to calculate size of stack sections, and assign + * values to stack symbols later */ + .stack_dummy (COPY): + { + KEEP(*(.stack*)) + } > RAM + + /* Set stack top to end of RAM, and stack limit move down by + * size of stack_dummy section */ + __StackTop = ORIGIN(RAM) + LENGTH(RAM); + __StackLimit = __StackTop - SIZEOF(.stack_dummy); + PROVIDE(__stack = __StackTop); + + /* Check if data + heap + stack exceeds RAM limit */ + ASSERT(__StackLimit >= __HeapLimit, "region RAM overflowed with stack") +} diff --git a/src/bootloader/main.rs b/src/bootloader/main.rs index d81da15..0d29549 100644 --- a/src/bootloader/main.rs +++ b/src/bootloader/main.rs @@ -40,8 +40,12 @@ extern { fn jump_to_application(address: u32); } +#[cfg(bootloader_type = "intermediate")] const APPLICATION_ADDR: u32 = 0x0; +#[cfg(bootloader_type = "final")] +const APPLICATION_ADDR: u32 = 0x8000; + fn bootloader_requested() -> bool { let start_ticks = systick::now();