[mirror_edk2.git] / MdePkg / Library / BaseIoLibIntrinsic / Arm / ArmVirtMmio.asm

;
;  Copyright (c) 2014-2018, Linaro Limited. All rights reserved.
;
;  This program and the accompanying materials are licensed and made available
;  under the terms and conditions of the BSD License which accompanies this
;  distribution.  The full text of the license may be found at
;  http:;opensource.org/licenses/bsd-license.php
;
;  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
;  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
;


AREA IoLibMmio, CODE, READONLY

EXPORT MmioRead8Internal
EXPORT MmioWrite8Internal
EXPORT MmioRead16Internal
EXPORT MmioWrite16Internal
EXPORT MmioRead32Internal
EXPORT MmioWrite32Internal
EXPORT MmioRead64Internal
EXPORT MmioWrite64Internal

;
;  Reads an 8-bit MMIO register.
;
;  Reads the 8-bit MMIO register specified by Address. The 8-bit read value is
;  returned. This function must guarantee that all MMIO read and write
;  operations are serialized.
;
;  @param  Address The MMIO register to read.
;
;  @return The value read.
;
MmioRead8Internal
  ldrb    r0, [r0]
  dmb
  bx      lr

;
;  Writes an 8-bit MMIO register.
;
;  Writes the 8-bit MMIO register specified by Address with the value specified
;  by Value and returns Value. This function must guarantee that all MMIO read
;  and write operations are serialized.
;
;  @param  Address The MMIO register to write.
;  @param  Value   The value to write to the MMIO register.
;
MmioWrite8Internal
  dmb     st
  strb    r1, [r0]
  bx      lr

;
;  Reads a 16-bit MMIO register.
;
;  Reads the 16-bit MMIO register specified by Address. The 16-bit read value is
;  returned. This function must guarantee that all MMIO read and write
;  operations are serialized.
;
;  @param  Address The MMIO register to read.
;
;  @return The value read.
;
MmioRead16Internal
  ldrh    r0, [r0]
  dmb
  bx      lr

;
;  Writes a 16-bit MMIO register.
;
;  Writes the 16-bit MMIO register specified by Address with the value specified
;  by Value and returns Value. This function must guarantee that all MMIO read
;  and write operations are serialized.
;
;  @param  Address The MMIO register to write.
;  @param  Value   The value to write to the MMIO register.
;
MmioWrite16Internal
  dmb     st
  strh    r1, [r0]
  bx      lr

;
;  Reads a 32-bit MMIO register.
;
;  Reads the 32-bit MMIO register specified by Address. The 32-bit read value is
;  returned. This function must guarantee that all MMIO read and write
;  operations are serialized.
;
;  @param  Address The MMIO register to read.
;
;  @return The value read.
;
MmioRead32Internal
  ldr     r0, [r0]
  dmb
  bx      lr

;
;  Writes a 32-bit MMIO register.
;
;  Writes the 32-bit MMIO register specified by Address with the value specified
;  by Value and returns Value. This function must guarantee that all MMIO read
;  and write operations are serialized.
;
;  @param  Address The MMIO register to write.
;  @param  Value   The value to write to the MMIO register.
;
MmioWrite32Internal
  dmb     st
  str     r1, [r0]
  bx      lr

;
;  Reads a 64-bit MMIO register.
;
;  Reads the 64-bit MMIO register specified by Address. The 64-bit read value is
;  returned. This function must guarantee that all MMIO read and write
;  operations are serialized.
;
;  @param  Address The MMIO register to read.
;
;  @return The value read.
;
MmioRead64Internal
  ldrd    r0, r1, [r0]
  dmb
  bx      lr

;
;  Writes a 64-bit MMIO register.
;
;  Writes the 64-bit MMIO register specified by Address with the value specified
;  by Value and returns Value. This function must guarantee that all MMIO read
;  and write operations are serialized.
;
;  @param  Address The MMIO register to write.
;  @param  Value   The value to write to the MMIO register.
;
MmioWrite64Internal
  dmb     st
  strd    r2, r3, [r0]
  bx      lr

  END
Commit	Line	Data
4134f2bd AB	1	;
	2	; Copyright (c) 2014-2018, Linaro Limited. All rights reserved.
	3	;
	4	; This program and the accompanying materials are licensed and made available
	5	; under the terms and conditions of the BSD License which accompanies this
	6	; distribution. The full text of the license may be found at
	7	; http:;opensource.org/licenses/bsd-license.php
	8	;
	9	; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
	10	; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
	11	;
	12
	13
	14	AREA IoLibMmio, CODE, READONLY
	15
	16	EXPORT MmioRead8Internal
	17	EXPORT MmioWrite8Internal
	18	EXPORT MmioRead16Internal
	19	EXPORT MmioWrite16Internal
	20	EXPORT MmioRead32Internal
	21	EXPORT MmioWrite32Internal
	22	EXPORT MmioRead64Internal
	23	EXPORT MmioWrite64Internal
	24
	25	;
	26	; Reads an 8-bit MMIO register.
	27	;
	28	; Reads the 8-bit MMIO register specified by Address. The 8-bit read value is
	29	; returned. This function must guarantee that all MMIO read and write
	30	; operations are serialized.
	31	;
	32	; @param Address The MMIO register to read.
	33	;
	34	; @return The value read.
	35	;
	36	MmioRead8Internal
	37	ldrb r0, [r0]
	38	dmb
	39	bx lr
	40
	41	;
	42	; Writes an 8-bit MMIO register.
	43	;
	44	; Writes the 8-bit MMIO register specified by Address with the value specified
	45	; by Value and returns Value. This function must guarantee that all MMIO read
	46	; and write operations are serialized.
	47	;
	48	; @param Address The MMIO register to write.
	49	; @param Value The value to write to the MMIO register.
	50	;
	51	MmioWrite8Internal
	52	dmb st
	53	strb r1, [r0]
	54	bx lr
	55
	56	;
	57	; Reads a 16-bit MMIO register.
	58	;
	59	; Reads the 16-bit MMIO register specified by Address. The 16-bit read value is
	60	; returned. This function must guarantee that all MMIO read and write
	61	; operations are serialized.
	62	;
	63	; @param Address The MMIO register to read.
	64	;
65	; @return The value read.
66	;
67	MmioRead16Internal
68	ldrh r0, [r0]
69	dmb
70	bx lr
71
72	;
73	; Writes a 16-bit MMIO register.
74	;
75	; Writes the 16-bit MMIO register specified by Address with the value specified
76	; by Value and returns Value. This function must guarantee that all MMIO read
77	; and write operations are serialized.
78	;
79	; @param Address The MMIO register to write.
80	; @param Value The value to write to the MMIO register.
81	;
82	MmioWrite16Internal
83	dmb st
84	strh r1, [r0]
85	bx lr
86
87	;
88	; Reads a 32-bit MMIO register.
89	;
90	; Reads the 32-bit MMIO register specified by Address. The 32-bit read value is
91	; returned. This function must guarantee that all MMIO read and write
92	; operations are serialized.
93	;
94	; @param Address The MMIO register to read.
95	;
96	; @return The value read.
97	;
98	MmioRead32Internal
99	ldr r0, [r0]
100	dmb
101	bx lr
102
103	;
104	; Writes a 32-bit MMIO register.
105	;
106	; Writes the 32-bit MMIO register specified by Address with the value specified
107	; by Value and returns Value. This function must guarantee that all MMIO read
108	; and write operations are serialized.
109	;
110	; @param Address The MMIO register to write.
111	; @param Value The value to write to the MMIO register.
112	;
113	MmioWrite32Internal
114	dmb st
115	str r1, [r0]
116	bx lr
117
118	;
119	; Reads a 64-bit MMIO register.
120	;
121	; Reads the 64-bit MMIO register specified by Address. The 64-bit read value is
122	; returned. This function must guarantee that all MMIO read and write
123	; operations are serialized.
124	;
125	; @param Address The MMIO register to read.
126	;
127	; @return The value read.
128	;
129	MmioRead64Internal
130	ldrd r0, r1, [r0]
131	dmb
132	bx lr
133
134	;
135	; Writes a 64-bit MMIO register.
136	;
137	; Writes the 64-bit MMIO register specified by Address with the value specified
138	; by Value and returns Value. This function must guarantee that all MMIO read
139	; and write operations are serialized.
140	;
141	; @param Address The MMIO register to write.
142	; @param Value The value to write to the MMIO register.
143	;
144	MmioWrite64Internal
145	dmb st
146	strd r2, r3, [r0]
147	bx lr
148
149	END