diff options
| author | bernard.xiong <[email protected]> | 2012-10-14 23:28:37 +0000 |
|---|---|---|
| committer | bernard.xiong <[email protected]> | 2012-10-14 23:28:37 +0000 |
| commit | 0c1371139684af526c05eee22ff337149332bd2c (patch) | |
| tree | 60579454b805e888c02d14df26794fee6e1ecc49 /libcpu/ppc/common | |
| parent | 8ab10598731740fe9264351108aaf4aa9121074f (diff) | |
Add taihu bsp (PPC405)
git-svn-id: https://rt-thread.googlecode.com/svn/trunk@2350 bbd45198-f89e-11dd-88c7-29a3b14d5316
Diffstat (limited to 'libcpu/ppc/common')
| -rw-r--r-- | libcpu/ppc/common/ptrace.h | 100 | ||||
| -rw-r--r-- | libcpu/ppc/common/stack.c | 88 |
2 files changed, 188 insertions, 0 deletions
diff --git a/libcpu/ppc/common/ptrace.h b/libcpu/ppc/common/ptrace.h new file mode 100644 index 0000000000..860d1a7c60 --- /dev/null +++ b/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
diff --git a/libcpu/ppc/common/stack.c b/libcpu/ppc/common/stack.c new file mode 100644 index 0000000000..05ae5abb80 --- /dev/null +++ b/libcpu/ppc/common/stack.c @@ -0,0 +1,88 @@ +/*
+ * File : stack.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2006-2011, RT-Thread Development Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date Author Notes
+ * 2011-02-14 Fred first implementation for
+ */
+
+#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;
+}
+
+/*@}*/
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