From ab03d3be21f229be8c28dba292d5da237a929a73 Mon Sep 17 00:00:00 2001 From: Miquel Sabaté Solà Date: Wed, 28 Aug 2024 22:25:56 +0200 Subject: Restructure the whole thing MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit It will be something more than just messing around with RISC-V stuff. Signed-off-by: Miquel Sabaté Solà --- arch/riscv/bios/hello.s | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) create mode 100644 arch/riscv/bios/hello.s (limited to 'arch/riscv/bios/hello.s') diff --git a/arch/riscv/bios/hello.s b/arch/riscv/bios/hello.s new file mode 100644 index 0000000..f3aa20a --- /dev/null +++ b/arch/riscv/bios/hello.s @@ -0,0 +1,23 @@ +# From: https://github.com/qemu/qemu/blob/23fa74974d8c96bc95cbecc0d4e2d90f984939f6/hw/riscv/virt.c#L82. +.set QEMU_UART0_ADDRESS, 0x10000000 + +.global _start +.section .text.bios + +_start: li a0, 0x68 + li a1, QEMU_UART0_ADDRESS + sb a0, (a1) # 'h' + + li a0, 0x65 + sb a0, (a1) # 'e' + + li a0, 0x6C + sb a0, (a1) # 'l' + + li a0, 0x6C + sb a0, (a1) # 'l' + + li a0, 0x6F + sb a0, (a1) # 'o' + +loop: j loop -- cgit v1.2.3