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[embedded] Add a riscv32-qemu-virt QEMU test configuration

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This commit is contained in:
Kuba Mracek
2024-10-28 21:37:52 -07:00
parent 9ee1ddc35e
commit dd1e3a9640
4 changed files with 71 additions and 0 deletions
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10
test/CMakeLists.txt
View File

@@ -547,6 +547,16 @@ if(SWIFT_SHOULD_BUILD_EMBEDDED_STDLIB_CROSS_COMPILING)
"${CMAKE_CURRENT_SOURCE_DIR}/lit.site.cfg.in"
"${CMAKE_CURRENT_BINARY_DIR}${VARIANT_SUFFIX}/lit.site.cfg"
"test${VARIANT_SUFFIX}.lit.site.cfg")
set(VARIANT_SUFFIX "-embedded-riscv32")
set(VARIANT_TRIPLE "riscv32-none-none-eabi")
set(VARIANT_EXTERNAL_EMBEDDED_PLATFORM TRUE)
set(VARIANT_EXTERNAL_EMBEDDED_DEVICE "riscv32-qemu-virt")
set(SWIFT_TEST_RESULTS_DIR "${CMAKE_BINARY_DIR}/${CMAKE_CFG_INTDIR}/swift-test-results/${VARIANT_TRIPLE}")
swift_configure_lit_site_cfg(
"${CMAKE_CURRENT_SOURCE_DIR}/lit.site.cfg.in"
"${CMAKE_CURRENT_BINARY_DIR}${VARIANT_SUFFIX}/lit.site.cfg"
"test${VARIANT_SUFFIX}.lit.site.cfg")
endif()
# Add shortcuts for the default variant.

9
utils/embedded-test-support/embedded-test-support.py
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@@ -63,6 +63,15 @@ def main():
semihosting = False
qemu_mode = "-bios"
always_optimize_for_size = True
elif args.device == "riscv32-qemu-virt":
target = "riscv32-none-none-eabi"
qemu_binary = "qemu-system-riscv32"
qemu_machine = "virt"
mmcu = ""
entry_point = "start"
semihosting = False
qemu_mode = "-bios none -kernel"
always_optimize_for_size = True
else:
assert False

12
utils/embedded-test-support/riscv32-qemu-virt/linkerscript.ld Normal file
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@@ -0,0 +1,12 @@
MEMORY
{
ram : ORIGIN = 0x80000000, LENGTH = 128K
}
SECTIONS
{
.text : { *(.start*) ; *(.text*) } > ram
.bss : { *(.bss*) } > ram
.data : { *(.data*) ; *(.rodata*) } > ram
/DISCARD/ : { *(.swift_modhash*) }
}

40
utils/embedded-test-support/riscv32-qemu-virt/support.c Normal file
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@@ -0,0 +1,40 @@
//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift open source project
//
// Copyright (c) 2024 Apple Inc. and the Swift project authors.
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
#include <stddef.h>
#include <stdint.h>
int puts(const char *p);
__attribute__((naked))
__attribute__((section(".start")))
void start() {
asm volatile("la sp, stack + 8192 - 4");
asm volatile("call main");
asm volatile("call halt");
}
void halt(void) {
puts("HALT\n");
asm("unimp");
}
__attribute__((aligned(4))) char stack[8192];
int putchar(int c) {
// This is only valid in an emulator (QEMU), and it's skipping a proper configuration of the UART device
// and waiting for a "ready to transit" state.
// QEMU riscv32-virt's specific location of the 16550A UART and its THR register
*(volatile uint8_t *)(0x10000000 + 0) = c;
return c;
}