assemble simple rom

7 files changed, 62 insertions, 0 deletions

diff --git a/prog/build.sh b/prog/build.sh
new file mode 100755
index 0000000..22557b4
--- /dev/null
+++ b/prog/build.sh
@@ -0,0 +1,6 @@
+#!/bin/sh
+riscv64-unknown-elf-as -march=rv32i -mabi=ilp32 -o main.o main.s
+riscv64-unknown-elf-ld -T link.ld -m elf32lriscv -o main.elf main.o
+riscv64-unknown-elf-objcopy -O binary main.elf main.bin
+xxd -g 1 -c 1 -p main.bin >main.hex
+cp -f main.hex ../rom/rom.hex
diff --git a/prog/link.ld b/prog/link.ld
new file mode 100644
index 0000000..98658c3
--- /dev/null
+++ b/prog/link.ld
@@ -0,0 +1,16 @@
+OUTPUT_ARCH( "riscv" )
+ENTRY(_start)
+
+MEMORY
+{
+  ROM (rx)  : ORIGIN = 0x00010000, LENGTH = 0xF0000    # 0x0001_0000 - 0x000F_FFFF
+  RAM (rwx) : ORIGIN = 0x00100000, LENGTH = 0xFEFFFFF  # 0x0010_0000 - 0xFF0F_FFFF
+}
+
+SECTIONS
+{
+  .text  : { *(.text) }  > ROM
+  .data  : { *(.data) }  > RAM
+  .bss   : { *(.bss) }   > RAM
+  .stack : { *(.stack) } > RAM
+}
diff --git a/prog/main.bin b/prog/main.bin
new file mode 100755
index 0000000..ba70022
--- /dev/null
+++ b/prog/main.bin
diff --git a/prog/main.elf b/prog/main.elf
new file mode 100755
index 0000000..4c53d74
--- /dev/null
+++ b/prog/main.elf
diff --git a/prog/main.hex b/prog/main.hex
new file mode 100644
index 0000000..116b9b4
--- /dev/null
+++ b/prog/main.hex
@@ -0,0 +1,16 @@
+93
+02
+50
+00
+13
+03
+30
+00
+b3
+83
+62
+00
+6f
+00
+00
+00
diff --git a/prog/main.o b/prog/main.o
new file mode 100644
index 0000000..e50c4a8
--- /dev/null
+++ b/prog/main.o
diff --git a/prog/main.s b/prog/main.s
new file mode 100644
index 0000000..bbae5bb
--- /dev/null
+++ b/prog/main.s
@@ -0,0 +1,24 @@
+.section .text
+.globl _start
+
+_start:
+  #la sp, stack_top
+    
+  #li a0, 10
+  #li a1, 20
+  #add a2, a0, a1
+  addi  t0, zero, 5
+  addi  t1, zero, 3
+  add   t2, t0,   t1
+
+halt_loop:
+  j halt_loop
+
+.section .data
+
+
+.section .bss
+
+.section .stack
+  .space 0x1000  # Allocate stack space
+stack_top: