original files of m241

2026-07-30 11:19:44 +05:30
parent 170c2b3f3a
commit afc7070c1f
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+/* syscallPpc.h - PowerPC specific System Call Infrastructure header */
+
+/*
+ * Copyright (c) 2003-2004, 2007 Wind River Systems, Inc.
+ *
+ * The right to copy, distribute or otherwise make use of this software
+ * may be licensed only pursuant to the terms of an applicable Wind River
+ * license agreement. 
+ */
+
+/*
+modification history
+--------------------
+01d,04may07,zl   updated portable library build configuration.
+01c,04may04,yvp  Renamed spare1 to srTable.
+01b,06apr04,yvp  SPR 95407: SYSCALL_ENTRY_FRAME_SIZE now made a multiple 
+                 of _STACK_ALIGN_SIZE.
+01a,15sep03,yvp  written.
+*/
+
+/*
+DESCRIPTION
+This header contains PowerPC-specific definitions and constants used by
+the System Call Infrastructure library.
+
+*/
+
+#ifndef __INCsyscallPpch
+#define __INCsyscallPpch
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+    /* defines */
+
+#define SYSCALL_ENTRY_FRAME_SIZE	96
+
+    /* PPC doesnt need a user-SP check since all params are in registers. */
+
+#define _SYSCALL_USER_SP_CHECK(sp)      
+
+    /* typedefs */
+
+#ifndef _ASMLANGUAGE
+    /* 
+     * The SYSCALL_ENTRY_STATE structure defines the saved machine state
+     * when the system call trap is taken. This information is architecture
+     * specific, and is used by the system call dispatcher to restart system
+     * calls that have been interrupted by the occurance of signals.
+     * System call restart is achieved by restoring the saved state at the
+     * time of the system call trap, and re-issuing the system call.
+     * Arguments to the system call are saved on the kernel stack, and 
+     * the address of that array is passed as an argument to the dispatcher.
+     * The layout of this structure must exactly match the ordering of members
+     * of the system call entry frame in src/arch/ppc/syscallALib.s.
+     */
+
+typedef struct syscall_entry_state
+    {
+    int    args[8];             /* argument list (r3-r10) */
+    int    scn;			/* System Call Number (SCN) in r0 */
+    void * pSdata;		/* small data pointer (r13) */
+    void * pSdata2;		/* small data pointer 2 (r2) */
+    void * pLR;			/* saved link register value */
+    int  * pUStack;		/* user-mode stack pointer */
+    int    statusReg;		/* saved Machine Status Register (SRR1) */ 
+    void * pc;			/* Trap return address (SRR0) */
+    int    nonVolatileRegs[4];	/* saved non-volatile registers (r28-r31) */
+    int    pSrTable;		/* Ptr to Segment Reg. Table (PPC60X only) */
+    int    spare1;
+    int    spare2;
+    } SYSCALL_ENTRY_STATE;
+#endif /* _ASMLANGUAGE */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __INCsyscallPpch */