[mirror_edk2.git] / MdePkg / Library / BaseLib / Ipf / AccessPsr.s

/// @file\r
///  IPF specific Processor Status Register accessing functions\r
///\r
/// Copyright (c) 2006 - 2008, Intel Corporation\r
/// All rights reserved. This program and the accompanying materials\r
/// are licensed and made available under the terms and conditions of the BSD License\r
/// which accompanies this distribution.  The full text of the license may be found at\r
/// http://opensource.org/licenses/bsd-license.php\r
///\r
/// THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
/// WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
///\r
/// Module Name: AccessPsr.s\r
///\r
///\r
\r
#define CpuModeMask           0x0000001008020000\r
\r
#define CpuInVirtualMode             0x1\r
#define CpuInPhysicalMode            0x0\r
#define CpuInMixMode                 (0x0 - 0x1)\r
\r
//---------------------------------------------------------------------------------\r
//++\r
// AsmReadPsr\r
//\r
// This routine is used to read the current value of Processor Status Register (PSR).\r
//\r
// Arguments :\r
//\r
// On Entry :\r
//\r
// Return Value: The current PSR value.\r
//\r
//--\r
//----------------------------------------------------------------------------------\r
.text\r
.type   AsmReadPsr, @function\r
.proc   AsmReadPsr\r
\r
AsmReadPsr::\r
        mov             r8 = psr;;\r
        br.ret.dpnt     b0;;\r
.endp   AsmReadPsr\r
\r
//---------------------------------------------------------------------------------\r
//++\r
// AsmWritePsr\r
//\r
// This routine is used to write the value of Processor Status Register (PSR).\r
//\r
// Arguments :\r
//\r
// On Entry : The value need to be written.\r
//\r
// Return Value: The value have been written.\r
//\r
//--\r
//----------------------------------------------------------------------------------\r
.text\r
.type   AsmWritePsr, @function\r
.proc   AsmWritePsr\r
.regstk 1, 0, 0, 0\r
\r
AsmWritePsr::\r
        mov             psr.l = in0\r
        mov             r8 = in0;;\r
        srlz.d;;\r
        srlz.i;;\r
        br.ret.dpnt     b0;;\r
.endp   AsmWritePsr\r
\r
//---------------------------------------------------------------------------------\r
//++\r
// AsmCpuVirtual\r
//\r
// This routine is used to determines if the CPU is currently executing\r
// in virtual, physical, or mixed mode.\r
//\r
// If the CPU is in virtual mode(PSR.RT=1, PSR.DT=1, PSR.IT=1), then 1 is returned.\r
// If the CPU is in physical mode(PSR.RT=0, PSR.DT=0, PSR.IT=0), then 0 is returned.\r
// If the CPU is not in physical mode or virtual mode, then it is in mixed mode,\r
// and -1 is returned.\r
//\r
// Arguments:\r
//\r
// On Entry: None\r
//\r
// Return Value: The CPU mode flag\r
//               return  1  The CPU is in virtual mode.\r
//               return  0  The CPU is in physical mode.\r
//               return -1  The CPU is in mixed mode.\r
//\r
//--\r
//----------------------------------------------------------------------------------\r
.text\r
.type   AsmCpuVirtual, @function\r
.proc   AsmCpuVirtual\r
\r
AsmCpuVirtual::\r
        mov            r29 = psr\r
        movl           r30 = CpuModeMask;;\r
        and            r28 = r30, r29;;\r
        cmp.eq         p6, p7 = r30, r28;;\r
(p6)    mov            r8 = CpuInVirtualMode;;\r
(p7)    cmp.eq         p6, p7 = 0x0, r28;;\r
(p6)    mov            r8 = CpuInPhysicalMode;;\r
(p7)    mov            r8 = CpuInMixMode;;\r
        br.ret.dpnt    b0;;\r
.endp   AsmCpuVirtual\r
Commit	Line	Data
f1baef62	1	/// @file\r
	2	/// IPF specific Processor Status Register accessing functions\r
	3	///\r
373ade0e	4	/// Copyright (c) 2006 - 2008, Intel Corporation\r
f1baef62	5	/// All rights reserved. This program and the accompanying materials\r
	6	/// are licensed and made available under the terms and conditions of the BSD License\r
	7	/// which accompanies this distribution. The full text of the license may be found at\r
	8	/// http://opensource.org/licenses/bsd-license.php\r
	9	///\r
	10	/// THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
	11	/// WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
	12	///\r
	13	/// Module Name: AccessPsr.s\r
	14	///\r
	15	///\r
	16	\r
	17	#define CpuModeMask 0x0000001008020000\r
	18	\r
	19	#define CpuInVirtualMode 0x1\r
	20	#define CpuInPhysicalMode 0x0\r
	21	#define CpuInMixMode (0x0 - 0x1)\r
	22	\r
	23	//---------------------------------------------------------------------------------\r
	24	//++\r
	25	// AsmReadPsr\r
	26	//\r
	27	// This routine is used to read the current value of Processor Status Register (PSR).\r
	28	//\r
	29	// Arguments :\r
	30	//\r
	31	// On Entry :\r
	32	//\r
	33	// Return Value: The current PSR value.\r
	34	//\r
	35	//--\r
	36	//----------------------------------------------------------------------------------\r
	37	.text\r
	38	.type AsmReadPsr, @function\r
	39	.proc AsmReadPsr\r
	40	\r
	41	AsmReadPsr::\r
	42	mov r8 = psr;;\r
	43	br.ret.dpnt b0;;\r
	44	.endp AsmReadPsr\r
	45	\r
	46	//---------------------------------------------------------------------------------\r
	47	//++\r
	48	// AsmWritePsr\r
	49	//\r
	50	// This routine is used to write the value of Processor Status Register (PSR).\r
	51	//\r
	52	// Arguments :\r
	53	//\r
	54	// On Entry : The value need to be written.\r
	55	//\r
	56	// Return Value: The value have been written.\r
	57	//\r
	58	//--\r
	59	//----------------------------------------------------------------------------------\r
	60	.text\r
	61	.type AsmWritePsr, @function\r
	62	.proc AsmWritePsr\r
	63	.regstk 1, 0, 0, 0\r
	64	\r
	65	AsmWritePsr::\r
	66	mov psr.l = in0\r
	67	mov r8 = in0;;\r
	68	srlz.d;;\r
69	srlz.i;;\r
70	br.ret.dpnt b0;;\r
71	.endp AsmWritePsr\r
72	\r
73	//---------------------------------------------------------------------------------\r
74	//++\r
75	// AsmCpuVirtual\r
76	//\r
77	// This routine is used to determines if the CPU is currently executing\r
78	// in virtual, physical, or mixed mode.\r
79	//\r
80	// If the CPU is in virtual mode(PSR.RT=1, PSR.DT=1, PSR.IT=1), then 1 is returned.\r
81	// If the CPU is in physical mode(PSR.RT=0, PSR.DT=0, PSR.IT=0), then 0 is returned.\r
82	// If the CPU is not in physical mode or virtual mode, then it is in mixed mode,\r
83	// and -1 is returned.\r
84	//\r
85	// Arguments:\r
86	//\r
87	// On Entry: None\r
88	//\r
89	// Return Value: The CPU mode flag\r
90	// return 1 The CPU is in virtual mode.\r
91	// return 0 The CPU is in physical mode.\r
92	// return -1 The CPU is in mixed mode.\r
93	//\r
94	//--\r
95	//----------------------------------------------------------------------------------\r
96	.text\r
97	.type AsmCpuVirtual, @function\r
98	.proc AsmCpuVirtual\r
99	\r
100	AsmCpuVirtual::\r
101	mov r29 = psr\r
102	movl r30 = CpuModeMask;;\r
103	and r28 = r30, r29;;\r
104	cmp.eq p6, p7 = r30, r28;;\r
105	(p6) mov r8 = CpuInVirtualMode;;\r
106	(p7) cmp.eq p6, p7 = 0x0, r28;;\r
107	(p6) mov r8 = CpuInPhysicalMode;;\r
108	(p7) mov r8 = CpuInMixMode;;\r
109	br.ret.dpnt b0;;\r
6446db6e	110	.endp AsmCpuVirtual\r