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

;\r
;  Copyright (c) 2014-2018, Linaro Limited. All rights reserved.\r
;\r
;  This program and the accompanying materials are licensed and made available\r
;  under the terms and conditions of the BSD License which accompanies this\r
;  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
\r
\r
AREA IoLibMmio, CODE, READONLY\r
\r
EXPORT MmioRead8Internal\r
EXPORT MmioWrite8Internal\r
EXPORT MmioRead16Internal\r
EXPORT MmioWrite16Internal\r
EXPORT MmioRead32Internal\r
EXPORT MmioWrite32Internal\r
EXPORT MmioRead64Internal\r
EXPORT MmioWrite64Internal\r
\r
;\r
;  Reads an 8-bit MMIO register.\r
;\r
;  Reads the 8-bit MMIO register specified by Address. The 8-bit read value is\r
;  returned. This function must guarantee that all MMIO read and write\r
;  operations are serialized.\r
;\r
;  @param  Address The MMIO register to read.\r
;\r
;  @return The value read.\r
;\r
MmioRead8Internal\r
  ldrb    r0, [r0]\r
  dmb\r
  bx      lr\r
\r
;\r
;  Writes an 8-bit MMIO register.\r
;\r
;  Writes the 8-bit MMIO register specified by Address with the value specified\r
;  by Value and returns Value. This function must guarantee that all MMIO read\r
;  and write operations are serialized.\r
;\r
;  @param  Address The MMIO register to write.\r
;  @param  Value   The value to write to the MMIO register.\r
;\r
MmioWrite8Internal\r
  dmb     st\r
  strb    r1, [r0]\r
  bx      lr\r
\r
;\r
;  Reads a 16-bit MMIO register.\r
;\r
;  Reads the 16-bit MMIO register specified by Address. The 16-bit read value is\r
;  returned. This function must guarantee that all MMIO read and write\r
;  operations are serialized.\r
;\r
;  @param  Address The MMIO register to read.\r
;\r
;  @return The value read.\r
;\r
MmioRead16Internal\r
  ldrh    r0, [r0]\r
  dmb\r
  bx      lr\r
\r
;\r
;  Writes a 16-bit MMIO register.\r
;\r
;  Writes the 16-bit MMIO register specified by Address with the value specified\r
;  by Value and returns Value. This function must guarantee that all MMIO read\r
;  and write operations are serialized.\r
;\r
;  @param  Address The MMIO register to write.\r
;  @param  Value   The value to write to the MMIO register.\r
;\r
MmioWrite16Internal\r
  dmb     st\r
  strh    r1, [r0]\r
  bx      lr\r
\r
;\r
;  Reads a 32-bit MMIO register.\r
;\r
;  Reads the 32-bit MMIO register specified by Address. The 32-bit read value is\r
;  returned. This function must guarantee that all MMIO read and write\r
;  operations are serialized.\r
;\r
;  @param  Address The MMIO register to read.\r
;\r
;  @return The value read.\r
;\r
MmioRead32Internal\r
  ldr     r0, [r0]\r
  dmb\r
  bx      lr\r
\r
;\r
;  Writes a 32-bit MMIO register.\r
;\r
;  Writes the 32-bit MMIO register specified by Address with the value specified\r
;  by Value and returns Value. This function must guarantee that all MMIO read\r
;  and write operations are serialized.\r
;\r
;  @param  Address The MMIO register to write.\r
;  @param  Value   The value to write to the MMIO register.\r
;\r
MmioWrite32Internal\r
  dmb     st\r
  str     r1, [r0]\r
  bx      lr\r
\r
;\r
;  Reads a 64-bit MMIO register.\r
;\r
;  Reads the 64-bit MMIO register specified by Address. The 64-bit read value is\r
;  returned. This function must guarantee that all MMIO read and write\r
;  operations are serialized.\r
;\r
;  @param  Address The MMIO register to read.\r
;\r
;  @return The value read.\r
;\r
MmioRead64Internal\r
  ldrd    r0, r1, [r0]\r
  dmb\r
  bx      lr\r
\r
;\r
;  Writes a 64-bit MMIO register.\r
;\r
;  Writes the 64-bit MMIO register specified by Address with the value specified\r
;  by Value and returns Value. This function must guarantee that all MMIO read\r
;  and write operations are serialized.\r
;\r
;  @param  Address The MMIO register to write.\r
;  @param  Value   The value to write to the MMIO register.\r
;\r
MmioWrite64Internal\r
  dmb     st\r
  strd    r2, r3, [r0]\r
  bx      lr\r
\r
  END\r
Commit	Line	Data
9095d37b LG	1	;\r
	2	; Copyright (c) 2014-2018, Linaro Limited. All rights reserved.\r
	3	;\r
	4	; This program and the accompanying materials are licensed and made available\r
	5	; under the terms and conditions of the BSD License which accompanies this\r
	6	; distribution. The full text of the license may be found at\r
	7	; http:;opensource.org/licenses/bsd-license.php\r
	8	;\r
	9	; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
	10	; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
	11	;\r
	12	\r
	13	\r
	14	AREA IoLibMmio, CODE, READONLY\r
	15	\r
	16	EXPORT MmioRead8Internal\r
	17	EXPORT MmioWrite8Internal\r
	18	EXPORT MmioRead16Internal\r
	19	EXPORT MmioWrite16Internal\r
	20	EXPORT MmioRead32Internal\r
	21	EXPORT MmioWrite32Internal\r
	22	EXPORT MmioRead64Internal\r
	23	EXPORT MmioWrite64Internal\r
	24	\r
	25	;\r
	26	; Reads an 8-bit MMIO register.\r
	27	;\r
	28	; Reads the 8-bit MMIO register specified by Address. The 8-bit read value is\r
	29	; returned. This function must guarantee that all MMIO read and write\r
	30	; operations are serialized.\r
	31	;\r
	32	; @param Address The MMIO register to read.\r
	33	;\r
	34	; @return The value read.\r
	35	;\r
	36	MmioRead8Internal\r
	37	ldrb r0, [r0]\r
	38	dmb\r
	39	bx lr\r
	40	\r
	41	;\r
	42	; Writes an 8-bit MMIO register.\r
	43	;\r
	44	; Writes the 8-bit MMIO register specified by Address with the value specified\r
	45	; by Value and returns Value. This function must guarantee that all MMIO read\r
	46	; and write operations are serialized.\r
	47	;\r
	48	; @param Address The MMIO register to write.\r
	49	; @param Value The value to write to the MMIO register.\r
	50	;\r
	51	MmioWrite8Internal\r
	52	dmb st\r
	53	strb r1, [r0]\r
	54	bx lr\r
	55	\r
	56	;\r
	57	; Reads a 16-bit MMIO register.\r
	58	;\r
	59	; Reads the 16-bit MMIO register specified by Address. The 16-bit read value is\r
	60	; returned. This function must guarantee that all MMIO read and write\r
	61	; operations are serialized.\r
	62	;\r
	63	; @param Address The MMIO register to read.\r
	64	;\r
65	; @return The value read.\r
66	;\r
67	MmioRead16Internal\r
68	ldrh r0, [r0]\r
69	dmb\r
70	bx lr\r
71	\r
72	;\r
73	; Writes a 16-bit MMIO register.\r
74	;\r
75	; Writes the 16-bit MMIO register specified by Address with the value specified\r
76	; by Value and returns Value. This function must guarantee that all MMIO read\r
77	; and write operations are serialized.\r
78	;\r
79	; @param Address The MMIO register to write.\r
80	; @param Value The value to write to the MMIO register.\r
81	;\r
82	MmioWrite16Internal\r
83	dmb st\r
84	strh r1, [r0]\r
85	bx lr\r
86	\r
87	;\r
88	; Reads a 32-bit MMIO register.\r
89	;\r
90	; Reads the 32-bit MMIO register specified by Address. The 32-bit read value is\r
91	; returned. This function must guarantee that all MMIO read and write\r
92	; operations are serialized.\r
93	;\r
94	; @param Address The MMIO register to read.\r
95	;\r
96	; @return The value read.\r
97	;\r
98	MmioRead32Internal\r
99	ldr r0, [r0]\r
100	dmb\r
101	bx lr\r
102	\r
103	;\r
104	; Writes a 32-bit MMIO register.\r
105	;\r
106	; Writes the 32-bit MMIO register specified by Address with the value specified\r
107	; by Value and returns Value. This function must guarantee that all MMIO read\r
108	; and write operations are serialized.\r
109	;\r
110	; @param Address The MMIO register to write.\r
111	; @param Value The value to write to the MMIO register.\r
112	;\r
113	MmioWrite32Internal\r
114	dmb st\r
115	str r1, [r0]\r
116	bx lr\r
117	\r
118	;\r
119	; Reads a 64-bit MMIO register.\r
120	;\r
121	; Reads the 64-bit MMIO register specified by Address. The 64-bit read value is\r
122	; returned. This function must guarantee that all MMIO read and write\r
123	; operations are serialized.\r
124	;\r
125	; @param Address The MMIO register to read.\r
126	;\r
127	; @return The value read.\r
128	;\r
129	MmioRead64Internal\r
130	ldrd r0, r1, [r0]\r
131	dmb\r
132	bx lr\r
133	\r
134	;\r
135	; Writes a 64-bit MMIO register.\r
136	;\r
137	; Writes the 64-bit MMIO register specified by Address with the value specified\r
138	; by Value and returns Value. This function must guarantee that all MMIO read\r
139	; and write operations are serialized.\r
140	;\r
141	; @param Address The MMIO register to write.\r
142	; @param Value The value to write to the MMIO register.\r
143	;\r
144	MmioWrite64Internal\r
145	dmb st\r
146	strd r2, r3, [r0]\r
147	bx lr\r
148	\r
149	END\r