write picorv32 test code
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parent
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2f92199c37
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@ -239,7 +239,7 @@ class ControlLoopParameters(Module, AutoCSR):
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self.zpos = CSRStatus(32, description='Measured Z position')
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self.bus = Interface(data_width = 32, address_width = 32, addressing="word")
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self.region = SoCRegion(size=minbits(0x14), cached=False)
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self.region = SoCRegion(size=minbits(0x17), cached=False)
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self.comb += [
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self.bus.cti.eq(0),
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self.bus.bte.eq(0),
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@ -0,0 +1,4 @@
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test.bin: test.elf
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riscv64-unknown-elf-objcopy -O binary -j .text test.elf test.bin
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test.elf: test.c
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riscv64-unknown-elf-gcc -march=rv32imc -mabi=ilp32 -ffreestanding -nostdlib -Os -Wl,-build-id=none,-Bstatic,-T,riscv.ld,--strip-debug -nostartfiles -lgcc test.c -o test.elf
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@ -0,0 +1,200 @@
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/* ---- Original Script: /opt/riscv32i/riscv32-unknown-elf/lib/ldscripts/elf32lriscv.x ---- */
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/* Default linker script, for normal executables */
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/* Copyright (C) 2014-2017 Free Software Foundation, Inc.
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Copying and distribution of this script, with or without modification,
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are permitted in any medium without royalty provided the copyright
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notice and this notice are preserved. */
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OUTPUT_FORMAT("elf32-littleriscv", "elf32-littleriscv",
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"elf32-littleriscv")
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OUTPUT_ARCH(riscv)
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ENTRY(_start)
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SECTIONS
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{
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. = 0x00010000;
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.text :
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{
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*(.text)
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*(.text.unlikely .text.*_unlikely .text.unlikely.*)
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*(.text.exit .text.exit.*)
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}
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{
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KEEP (*(SORT_NONE(.init)))
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}
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{
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KEEP (*(SORT_NONE(.fini)))
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PROVIDE (__etext = .);
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KEEP (*(.preinit_array))
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PROVIDE_HIDDEN (__preinit_array_end = .);
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}
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.init_array :
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{
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PROVIDE_HIDDEN (__init_array_start = .);
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KEEP (*(SORT_BY_INIT_PRIORITY(.init_array.*) SORT_BY_INIT_PRIORITY(.ctors.*)))
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KEEP (*(.init_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .ctors))
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PROVIDE_HIDDEN (__init_array_end = .);
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KEEP (*(SORT_BY_INIT_PRIORITY(.fini_array.*) SORT_BY_INIT_PRIORITY(.dtors.*)))
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KEEP (*(.fini_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .dtors))
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PROVIDE_HIDDEN (__fini_array_end = .);
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}
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.ctors :
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/* gcc uses crtbegin.o to find the start of
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the constructors, so we make sure it is
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first. Because this is a wildcard, it
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doesn't matter if the user does not
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actually link against crtbegin.o; the
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linker won't look for a file to match a
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wildcard. The wildcard also means that it
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doesn't matter which directory crtbegin.o
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is in. */
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KEEP (*crtbegin.o(.ctors))
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KEEP (*crtbegin?.o(.ctors))
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/* We don't want to include the .ctor section from
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the crtend.o file until after the sorted ctors.
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The .ctor section from the crtend file contains the
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end of ctors marker and it must be last */
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KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .ctors))
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KEEP (*(SORT(.ctors.*)))
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KEEP (*(.ctors))
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}
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.dtors :
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{
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KEEP (*crtbegin.o(.dtors))
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KEEP (*crtbegin?.o(.dtors))
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KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .dtors))
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KEEP (*(SORT(.dtors.*)))
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KEEP (*(.dtors))
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}
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.jcr : { KEEP (*(.jcr)) }
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. = DATA_SEGMENT_RELRO_END (0, .);
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.data :
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{
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*(.data .data.* .gnu.linkonce.d.*)
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SORT(CONSTRUCTORS)
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}
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.got : { *(.got.plt) *(.igot.plt) *(.got) *(.igot) }
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/* We want the small data sections together, so single-instruction offsets
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can access them all, and initialized data all before uninitialized, so
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we can shorten the on-disk segment size. */
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. = .;
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.bss :
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*(.dynbss)
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*(.bss .bss.* .gnu.linkonce.b.*)
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*(COMMON)
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/* Align here to ensure that the .bss section occupies space up to
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_end. Align after .bss to ensure correct alignment even if the
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.bss section disappears because there are no input sections.
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FIXME: Why do we need it? When there is no .bss section, we don't
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pad the .data section. */
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. = ALIGN(. != 0 ? 32 / 8 : 1);
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}
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. = ALIGN(32 / 8);
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. = SEGMENT_START("ldata-segment", .);
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. = ALIGN(32 / 8);
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_end = .; PROVIDE (end = .);
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. = DATA_SEGMENT_END (.);
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/* Stabs debugging sections. */
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/* DWARF debug sections.
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Symbols in the DWARF debugging sections are relative to the beginning
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of the section so we begin them at 0. */
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/DISCARD/ : { *(.note.GNU-stack) *(.gnu_debuglink) *(.gnu.lto_*) }
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}
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@ -0,0 +1,10 @@
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#include <stdint.h>
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void _start(void)
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{
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volatile uint32_t *write = (volatile uint32_t *)(0x100000 + 0x10);
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volatile uint32_t *read = (volatile uint32_t *)( 0x100000 + 0x0);
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*write = *read;
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for (;;) ;
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}
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