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Lines 33-39
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*/ |
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*/ |
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#include <sys/io.h> |
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#include "vmmouse_proto.h" |
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#include "vmmouse_proto.h" |
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#include "vmmouse_client.h" |
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/* |
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/* |
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Lines 119-124
VMMouseProtoInOut(VMMouseProtoCmd *cmd) // IN/OUT
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#endif |
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#endif |
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} |
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} |
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/* |
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*----------------------------------------------------------------------------- |
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* |
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* VMMouseGetIOPL -- |
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* |
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* Helper to figure out the current I/O privilege level (idea by |
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* Jiri Kosina <jkosina@suse.cz>) |
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* |
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* Results: |
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* Returns I/O privilege level |
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* |
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* Side effects: |
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* None |
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* |
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*----------------------------------------------------------------------------- |
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*/ |
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int |
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VMMouseGetIOPL() |
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{ |
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unsigned long eflags; |
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asm ("pushf\n\tpop %0" : "=r" (eflags)); |
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return (eflags >> 12) & 3; |
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} |
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/* |
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/* |
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*----------------------------------------------------------------------------- |
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*----------------------------------------------------------------------------- |
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Lines 140-147
VMMouseProtoInOut(VMMouseProtoCmd *cmd) // IN/OUT
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void |
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void |
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VMMouseProto_SendCmd(VMMouseProtoCmd *cmd) // IN/OUT |
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VMMouseProto_SendCmd(VMMouseProtoCmd *cmd) // IN/OUT |
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{ |
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{ |
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int cpl; |
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cmd->in.magic = VMMOUSE_PROTO_MAGIC; |
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cmd->in.magic = VMMOUSE_PROTO_MAGIC; |
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cmd->in.port = VMMOUSE_PROTO_PORT; |
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cmd->in.port = VMMOUSE_PROTO_PORT; |
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#if defined __i386__ || defined __x86_64__ |
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cpl = VMMouseGetIOPL(); |
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VMwareLog(("Current I/O privilege level: %d", cpl)); |
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/* |
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* To access i/o ports above 0x3ff, we need to be in iopl(3). |
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*/ |
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VMwareLog(("Switching to I/O privilege level 3.")); |
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iopl(3); |
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#endif |
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VMMouseProtoInOut(cmd); |
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VMMouseProtoInOut(cmd); |
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#if defined __i386__ || defined __x86_64__ |
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VMwareLog(("Switching back to previous I/O privilege level %d.\n", cpl)); |
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iopl(cpl); |
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#endif |
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} |
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} |
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