初始提交

2025-06-27 00:32:57 +08:00
commit e40bb2ba8a
5134 changed files with 2158460 additions and 0 deletions
--- a/Project/Src/rt-thread/libcpu/mips/x1000/stack.c
+++ b/Project/Src/rt-thread/libcpu/mips/x1000/stack.c
@@ -0,0 +1,82 @@
+/*
+ * File      : stack.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2008 - 2012, RT-Thread Development Team
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2016年9月8日     Urey         the first version
+ */
+
+#include <rtthread.h>
+
+#include "../common/mips.h"
+
+register U32 $GP __asm__ ("$28");
+
+rt_uint8_t *rt_hw_stack_init(void *tentry, void *parameter, rt_uint8_t *stack_addr, void *texit)
+{
+    static rt_uint32_t wSR=0;
+    static rt_uint32_t wGP;
+
+	mips_reg_ctx	*regCtx;
+	mips_arg_ctx	*argCtx;
+	rt_uint32_t i;
+
+	if (wSR == 0)
+	{
+		wSR = read_c0_status();
+		wSR &= 0xfffffffe;
+		wSR |= 0x0403;
+
+		wGP = $GP;
+	}
+
+	if ((rt_uint32_t) stack_addr & 0x7)
+	{
+		stack_addr = (rt_uint8_t *)((rt_uint32_t)stack_addr - 4);
+	}
+
+	argCtx = (mips_arg_ctx *)((rt_uint32_t)stack_addr - sizeof(mips_arg_ctx));
+	regCtx = (mips_reg_ctx *)((rt_uint32_t)stack_addr - sizeof(mips_arg_ctx) - sizeof(mips_reg_ctx));
+
+	for (i = 0; i < 4; ++i)
+	{
+		argCtx->args[i] = i;
+	}
+
+	//保存通用寄存器
+	for (i = 0; i < 32; ++i)
+	{
+		regCtx->regs[i] = i;
+	}
+
+	regCtx->regs[REG_SP] = (rt_uint32_t)stack_addr;
+	regCtx->regs[REG_A0] = (rt_uint32_t)parameter;
+	regCtx->regs[REG_GP] = (rt_uint32_t)wGP;
+	regCtx->regs[REG_FP] = (rt_uint32_t)0x0;
+	regCtx->regs[REG_RA] = (rt_uint32_t)texit;
+
+    regCtx->CP0DataLO	= 0x00;
+    regCtx->CP0DataHI	= 0x00;
+    regCtx->CP0Cause	= read_c0_cause();
+    regCtx->CP0Status	= wSR;
+    regCtx->CP0EPC		= (rt_uint32_t)tentry;
+    regCtx->CP0BadVAddr= 0x00;
+
+	return (rt_uint8_t *)(regCtx);
+}