sw: bootrom: Make stack selectable via define
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@ -5,4 +5,4 @@ riscv64-elf-gcc -mabi=ilp32 -march=rv32i -nostdlib -nostartfiles -ffreestanding
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#riscv64-elf-objdump -D bootrom.elf
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#riscv64-elf-objdump -D bootrom.elf
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riscv64-elf-objcopy -O binary bootrom.elf bootrom.bin
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riscv64-elf-objcopy -O binary bootrom.elf bootrom.bin
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od --endian=little -vtx4 -An -w4 bootrom.bin | tr -d ' ' > bootrom.vhex
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od --endian=little -vtx4 -An -w4 bootrom.bin | tr -d ' ' > bootrom.vhex
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r2 -A -c 'pdf @ sym._start' -q bootrom.elf
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r2 -A -c 'pdf @ entry0' -q bootrom.elf
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@ -7,16 +7,20 @@
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#define UART0_SR_RX_DATA_EMPTY (1 << 0)
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#define UART0_SR_RX_DATA_EMPTY (1 << 0)
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#define UART0_SR_TX_FULL (1 << 1)
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#define UART0_SR_TX_FULL (1 << 1)
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/*
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//#define ENABLE_STACK
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#ifdef ENABLE_STACK
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// Set up stack pointer
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// Set up stack pointer
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asm("_start:\
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asm("_start:\
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xor sp, sp, sp;\
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xor sp, sp, sp;\
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lui sp, 0x40100;\
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lui sp, 0x40100;\
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j main;\
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j main;\
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");
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");
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*/
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#else
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#define main() _start()
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#endif /* ifdef ENABLE_STACK */
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__attribute__((noreturn)) void _start() {
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__attribute__((noreturn)) void main() {
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uint8_t state = 0;
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uint8_t state = 0;
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uint8_t c;
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uint8_t c;
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uint8_t opcode;
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uint8_t opcode;
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