From f695df295da82c8ef801906ad8b00b0e8afa7502 Mon Sep 17 00:00:00 2001 From: Nathaniel Graff Date: Thu, 7 Mar 2019 09:27:31 -0800 Subject: Remove legacy BSP Signed-off-by: Nathaniel Graff --- bsp/env/start.S | 112 -------------------------------------------------------- 1 file changed, 112 deletions(-) delete mode 100644 bsp/env/start.S (limited to 'bsp/env/start.S') diff --git a/bsp/env/start.S b/bsp/env/start.S deleted file mode 100644 index 4d1eb04..0000000 --- a/bsp/env/start.S +++ /dev/null @@ -1,112 +0,0 @@ -// See LICENSE for license details. -#include -#include - -/* This is defined in sifive/platform.h, but that can't be included from - * assembly. */ -#define CLINT_CTRL_ADDR 0x02000000 - - .section .init - .globl _start - .type _start,@function - -_start: - .cfi_startproc - .cfi_undefined ra -.option push -.option norelax - la gp, __global_pointer$ -.option pop - la sp, _sp - -#if defined(ENABLE_SMP) - smp_pause(t0, t1) -#endif - - /* Load data section */ - la a0, _data_lma - la a1, _data - la a2, _edata - bgeu a1, a2, 2f -1: - lw t0, (a0) - sw t0, (a1) - addi a0, a0, 4 - addi a1, a1, 4 - bltu a1, a2, 1b -2: - - /* Clear bss section */ - la a0, __bss_start - la a1, _end - bgeu a0, a1, 2f -1: - sw zero, (a0) - addi a0, a0, 4 - bltu a0, a1, 1b -2: - - /* Call global constructors */ - la a0, __libc_fini_array - call atexit - call __libc_init_array - -#ifndef __riscv_float_abi_soft - /* Enable FPU */ - li t0, MSTATUS_FS - csrs mstatus, t0 - csrr t1, mstatus - and t1, t1, t0 - beqz t1, 1f - fssr x0 -1: -#endif - -#if defined(ENABLE_SMP) - smp_resume(t0, t1) - - csrr a0, mhartid - bnez a0, 2f -#endif - - auipc ra, 0 - addi sp, sp, -16 -#if __riscv_xlen == 32 - sw ra, 8(sp) -#else - sd ra, 8(sp) -#endif - - /* argc = argv = 0 */ - li a0, 0 - li a1, 0 - call main - tail exit -1: - j 1b - -#if defined(ENABLE_SMP) -2: - la t0, trap_entry - csrw mtvec, t0 - - csrr a0, mhartid - la t1, _sp - slli t0, a0, 10 - sub sp, t1, t0 - - auipc ra, 0 - addi sp, sp, -16 -#if __riscv_xlen == 32 - sw ra, 8(sp) -#else - sd ra, 8(sp) -#endif - - call secondary_main - tail exit - -1: - j 1b -#endif - .cfi_endproc -- cgit v1.2.3