原始版本

RT_Thread/libcpu/ppc/common/SConscript

@@ -0,0 +1,13 @@
+# RT-Thread building script for component
+
+from building import *
+
+Import('rtconfig')
+
+cwd     = GetCurrentDir()
+src     = Glob('*.c') + Glob('*.cpp') + Glob('*_gcc.S')
+CPPPATH = [cwd]
+
+group = DefineGroup('libcpu', src, depend = [''], CPPPATH = CPPPATH)
+
+Return('group')

RT_Thread/libcpu/ppc/common/ptrace.h

@@ -0,0 +1,100 @@
+#ifndef _PPC_PTRACE_H
+#define _PPC_PTRACE_H
+
+/*
+ * This struct defines the way the registers are stored on the
+ * kernel stack during a system call or other kernel entry.
+ *
+ * this should only contain volatile regs
+ * since we can keep non-volatile in the thread_struct
+ * should set this up when only volatiles are saved
+ * by intr code.
+ *
+ * Since this is going on the stack, *CARE MUST BE TAKEN* to insure
+ * that the overall structure is a multiple of 16 bytes in length.
+ *
+ * Note that the offsets of the fields in this struct correspond with
+ * the PT_* values below.  This simplifies arch/ppc/kernel/ptrace.c.
+ */
+
+#ifndef __ASSEMBLY__
+#define PPC_REG unsigned long
+
+struct pt_regs {
+    PPC_REG gpr[32];
+    PPC_REG nip;
+    PPC_REG msr;
+    PPC_REG orig_gpr3;  /* Used for restarting system calls */
+    PPC_REG ctr;
+    PPC_REG link;
+    PPC_REG xer;
+    PPC_REG ccr;
+    PPC_REG mq;     /* 601 only (not used at present) */
+                    /* Used on APUS to hold IPL value. */
+    PPC_REG trap;       /* Reason for being here */
+    PPC_REG dar;        /* Fault registers */
+    PPC_REG dsisr;
+    PPC_REG result;     /* Result of a system call */
+}__attribute__((packed)) CELL_STACK_FRAME_t;
+#endif
+
+#define STACK_FRAME_OVERHEAD    16  /* size of minimum stack frame */
+
+/* Size of stack frame allocated when calling signal handler. */
+#define __SIGNAL_FRAMESIZE  64
+
+#define instruction_pointer(regs) ((regs)->nip)
+#define user_mode(regs) (((regs)->msr & MSR_PR) != 0)
+
+/*
+ * Offsets used by 'ptrace' system call interface.
+ * These can't be changed without breaking binary compatibility
+ * with MkLinux, etc.
+ */
+#define PT_R0   0
+#define PT_R1   1
+#define PT_R2   2
+#define PT_R3   3
+#define PT_R4   4
+#define PT_R5   5
+#define PT_R6   6
+#define PT_R7   7
+#define PT_R8   8
+#define PT_R9   9
+#define PT_R10  10
+#define PT_R11  11
+#define PT_R12  12
+#define PT_R13  13
+#define PT_R14  14
+#define PT_R15  15
+#define PT_R16  16
+#define PT_R17  17
+#define PT_R18  18
+#define PT_R19  19
+#define PT_R20  20
+#define PT_R21  21
+#define PT_R22  22
+#define PT_R23  23
+#define PT_R24  24
+#define PT_R25  25
+#define PT_R26  26
+#define PT_R27  27
+#define PT_R28  28
+#define PT_R29  29
+#define PT_R30  30
+#define PT_R31  31
+
+#define PT_NIP  32
+#define PT_MSR  33
+#define PT_ORIG_R3 34
+#define PT_CTR  35
+#define PT_LNK  36
+#define PT_XER  37
+#define PT_CCR  38
+#define PT_MQ   39
+
+#define PT_FPR0 48  /* each FP reg occupies 2 slots in this space */
+#define PT_FPR31 (PT_FPR0 + 2*31)
+#define PT_FPSCR (PT_FPR0 + 2*32 + 1)
+
+#endif

RT_Thread/libcpu/ppc/common/stack.c

@@ -0,0 +1,84 @@
+/*
+ * Copyright (c) 2006-2022, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2011-02-14     Fred         the first version
+ */
+
+#include <rtthread.h>
+
+/**
+ * @addtogroup PowerPC
+ */
+/*@{*/
+
+/**
+ * This function will initialize thread stack
+ *
+ * @param tentry the entry of thread
+ * @param parameter the parameter of entry
+ * @param stack_addr the beginning stack address
+ * @param texit the function will be called when thread exit
+ *
+ * @return stack address
+ */
+rt_uint8_t *rt_hw_stack_init(void *tentry, void *parameter,
+    rt_uint8_t *stack_addr, void *texit)
+{
+    unsigned long *stk;
+    rt_uint32_t msr;
+
+    __asm__ __volatile__("mfmsr %0\n" : "=r" (msr));
+    msr |= 0x00028000;
+
+    stk      = (unsigned long *)stack_addr;
+    --stk;
+    *(--stk) = msr;                 /* srr0: machine status register */
+    *(--stk) = (rt_uint32_t)tentry; /* srr1: entry point */
+    *(--stk) = (rt_uint32_t)texit;  /* lr: link register */
+    *(--stk) = 0x0F0F0F0F;          /* ctr: counter register */
+    *(--stk) = 0x0F0F0F0F;          /* xer: fixed-point exception register */
+    *(--stk) = 0x0F0F0F0F;          /* cr : condition register */
+    *(--stk) = 0x00;                /* usprg0 */
+
+    *(--stk) = 0x31;            /* r31 */
+    *(--stk) = 0x30;            /* r30 */
+    *(--stk) = 0x29;            /* r29 */
+    *(--stk) = 0x28;            /* r28 */
+    *(--stk) = 0x27;            /* r27 */
+    *(--stk) = 0x26;            /* r26 */
+    *(--stk) = 0x25;            /* r25 */
+    *(--stk) = 0x24;            /* r24 */
+    *(--stk) = 0x23;            /* r23 */
+    *(--stk) = 0x22;            /* r22 */
+    *(--stk) = 0x21;            /* r21 */
+    *(--stk) = 0x20;            /* r20 */
+    *(--stk) = 0x19;            /* r19 */
+    *(--stk) = 0x18;            /* r18 */
+    *(--stk) = 0x17;            /* r17 */
+    *(--stk) = 0x16;            /* r16 */
+    *(--stk) = 0x15;            /* r15 */
+    *(--stk) = 0x14;            /* r14 */
+    *(--stk) = 0x13;            /* r13: thread id */
+    *(--stk) = 0x12;            /* r12 */
+    *(--stk) = 0x11;            /* r11 */
+    *(--stk) = 0x10;            /* r10 */
+    *(--stk) = 0x09;            /* r09 */
+    *(--stk) = 0x08;            /* r08 */
+    *(--stk) = 0x07;            /* r07 */
+    *(--stk) = 0x06;            /* r06 */
+    *(--stk) = 0x05;            /* r05 */
+    *(--stk) = 0x04;            /* r04 */
+    *(--stk) = (rt_uint32_t)parameter;  /* r03: parameter and return  */
+    *(--stk) = 0x02;            /* r02: toc */
+                                /* r01: sp */
+    *(--stk) = 0x0;             /* r00 */
+
+    /* return task's current stack address */
+    return (rt_uint8_t *)stk;
+}
+
+/*@}*/